WIP shadow-stack based mark/sweep collector

.circleci/config.yml

@@ -1,114 +0,0 @@
-version: 2.1
-
-commands:
-  submodules:
-    steps:
-      - run:
-          name: "Pull submodules"
-          command: git submodule update --init
-  llvm-source-linux:
-    steps:
-      - restore_cache:
-          keys:
-            - llvm-source-14-v3
-      - run:
-          name: "Fetch LLVM source"
-          command: make llvm-source
-      - save_cache:
-          key: llvm-source-14-v3
-          paths:
-            - llvm-project/clang/lib/Headers
-            - llvm-project/clang/include
-            - llvm-project/compiler-rt
-            - llvm-project/lld/include
-            - llvm-project/llvm/include
-  hack-ninja-jobs:
-    steps:
-      - run:
-          name: "Hack Ninja to use less jobs"
-          command: |
-            echo -e '#!/bin/sh\n/usr/bin/ninja -j3 "$@"' > /go/bin/ninja
-            chmod +x /go/bin/ninja
-  build-binaryen-linux:
-    steps:
-      - restore_cache:
-          keys:
-            - binaryen-linux-v2
-      - run:
-          name: "Build Binaryen"
-          command: |
-            make binaryen
-      - save_cache:
-          key: binaryen-linux-v2
-          paths:
-            - build/wasm-opt
-  test-linux:
-    parameters:
-      llvm:
-        type: string
-      fmt-check:
-        type: boolean
-        default: true
-    steps:
-      - checkout
-      - submodules
-      - run:
-          name: "Install apt dependencies"
-          command: |
-            echo 'deb https://apt.llvm.org/buster/ llvm-toolchain-buster-<<parameters.llvm>> main' > /etc/apt/sources.list.d/llvm.list
-            wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
-            apt-get update
-            apt-get install --no-install-recommends -y \
-                llvm-<<parameters.llvm>>-dev \
-                clang-<<parameters.llvm>> \
-                libclang-<<parameters.llvm>>-dev \
-                lld-<<parameters.llvm>> \
-                cmake \
-                ninja-build
-      - hack-ninja-jobs
-      - build-binaryen-linux
-      - restore_cache:
-          keys:
-            - go-cache-v3-{{ checksum "go.mod" }}-{{ .Environment.CIRCLE_PREVIOUS_BUILD_NUM }}
-            - go-cache-v3-{{ checksum "go.mod" }}
-      - llvm-source-linux
-      - run: go install -tags=llvm<<parameters.llvm>> .
-      - restore_cache:
-          keys:
-            - wasi-libc-sysroot-systemclang-v6
-      - run: make wasi-libc
-      - save_cache:
-          key: wasi-libc-sysroot-systemclang-v6
-          paths:
-            - lib/wasi-libc/sysroot
-      - when:
-          condition: <<parameters.fmt-check>>
-          steps:
-          - run:
-              # Do this before gen-device so that it doesn't check the
-              # formatting of generated files.
-              name: Check Go code formatting
-              command: make fmt-check
-      - run: make gen-device -j4
-      - run: make smoketest XTENSA=0
-      - save_cache:
-          key: go-cache-v3-{{ checksum "go.mod" }}-{{ .Environment.CIRCLE_BUILD_NUM }}
-          paths:
-            - ~/.cache/go-build
-            - /go/pkg/mod
-
-jobs:
-  test-llvm14-go118:
-    docker:
-      - image: golang:1.18-buster
-    steps:
-      - test-linux:
-          llvm: "14"
-    resource_class: large
-
-workflows:
-  test-all:
-    jobs:
-      # This tests our lowest supported versions of Go and LLVM, to make sure at
-      # least the smoke tests still pass.
-      - test-llvm14-go118

.dockerignore

@@ -1,5 +0,0 @@
-build/
-llvm-*/
-.github
-.circleci
-

.github/workflows/build-macos.yml

@@ -1,134 +0,0 @@
-name: macOS
-
-on:
-  pull_request:
-  push:
-    branches:
-      - dev
-      - release
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build-macos:
-    name: build-macos
-    runs-on: macos-11
-    steps:
-      - name: Install Dependencies
-        shell: bash
-        run: |
-          HOMEBREW_NO_AUTO_UPDATE=1 brew install qemu binaryen
-      - name: Checkout
-        uses: actions/checkout@v3
-        with:
-          submodules: true
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-          cache: true
-      - name: Restore LLVM source cache
-        uses: actions/cache/restore@v3
-        id: cache-llvm-source
-        with:
-          key: llvm-source-15-macos-v3
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Download LLVM source
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        run: make llvm-source
-      - name: Save LLVM source cache
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Restore LLVM build cache
-        uses: actions/cache/restore@v3
-        id: cache-llvm-build
-        with:
-          key: llvm-build-15-macos-v4
-          path: llvm-build
-      - name: Build LLVM
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        shell: bash
-        run: |
-          # fetch LLVM source
-          rm -rf llvm-project
-          make llvm-source
-          # install dependencies
-          HOMEBREW_NO_AUTO_UPDATE=1 brew install cmake ninja
-          # build!
-          make llvm-build
-          find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
-      - name: Save LLVM build cache
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
-          path: llvm-build
-      - name: Cache wasi-libc sysroot
-        uses: actions/cache@v3
-        id: cache-wasi-libc
-        with:
-          key: wasi-libc-sysroot-v4
-          path: lib/wasi-libc/sysroot
-      - name: Build wasi-libc
-        if: steps.cache-wasi-libc.outputs.cache-hit != 'true'
-        run: make wasi-libc
-      - name: make gen-device
-        run: make -j3 gen-device
-      - name: Test TinyGo
-        shell: bash
-        run: make test GOTESTFLAGS="-short"
-      - name: Build TinyGo release tarball
-        run: make release -j3
-      - name: Test stdlib packages
-        run: make tinygo-test
-      - name: Make release artifact
-        shell: bash
-        run: cp -p build/release.tar.gz build/tinygo.darwin-amd64.tar.gz 
-      - name: Publish release artifact
-        # Note: this release artifact is double-zipped, see:
-        # https://github.com/actions/upload-artifact/issues/39
-        # We can essentially pick one of these:
-        # - have a double-zipped artifact when downloaded from the UI
-        # - have a very slow artifact upload
-        # We're doing the former here, to keep artifact uploads fast.
-        uses: actions/upload-artifact@v2
-        with:
-          name: release-double-zipped
-          path: build/tinygo.darwin-amd64.tar.gz
-      - name: Smoke tests
-        shell: bash
-        run: make smoketest TINYGO=$(PWD)/build/tinygo
-  test-macos-homebrew:
-    name: homebrew-install
-    runs-on: macos-latest
-    steps:
-      - name: Install LLVM
-        shell: bash
-        run: |
-          HOMEBREW_NO_AUTO_UPDATE=1 brew install llvm@15
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-          cache: true
-      - name: Build TinyGo
-        run: go install
-      - name: Check binary
-        run: tinygo version

.github/workflows/docker.yml

@@ -1,100 +0,0 @@
-# This is the Github action to build and push the tinygo/tinygo-dev Docker image.
-# If you are looking for the tinygo/tinygo "release" Docker image please see
-# https://github.com/tinygo-org/docker
-#
-name: Docker
-on:
-  push:
-    branches: [ dev, fix-docker-llvm-build ]
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  push_to_registry:
-    name: build-push-dev
-    runs-on: ubuntu-latest
-    permissions:
-      packages: write
-      contents: read
-    steps:
-      - name: Check out the repo
-        uses: actions/checkout@v3
-        with:
-          submodules: recursive
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-      - name: Docker meta
-        id: meta
-        uses: docker/metadata-action@v4
-        with:
-          images: |
-            tinygo/tinygo-dev
-            ghcr.io/${{ github.repository_owner }}/tinygo-dev
-          tags: |
-            type=sha,format=long
-            type=raw,value=latest
-      - name: Log in to Docker Hub
-        uses: docker/login-action@v2
-        with:
-          username: ${{ secrets.DOCKER_HUB_USERNAME }}
-          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
-      - name: Log in to Github Container Registry
-        uses: docker/login-action@v2
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Build and push
-        uses: docker/build-push-action@v3
-        with:
-          context: .
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          build-contexts: tinygo-llvm-build=docker-image://tinygo/llvm-15
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-      - name: Trigger Drivers repo build on Github Actions
-        run: |
-          curl -X POST \
-          -H "Authorization: Bearer ${{secrets.GHA_ACCESS_TOKEN}}" \
-          -H "Accept: application/vnd.github.v3+json" \
-          https://api.github.com/repos/tinygo-org/drivers/actions/workflows/build.yml/dispatches \
-          -d '{"ref": "dev"}'
-      - name: Trigger Bluetooth repo build on Github Actions
-        run: |
-          curl -X POST \
-          -H "Authorization: Bearer ${{secrets.GHA_ACCESS_TOKEN}}" \
-          -H "Accept: application/vnd.github.v3+json" \
-          https://api.github.com/repos/tinygo-org/bluetooth/actions/workflows/linux.yml/dispatches \
-          -d '{"ref": "dev"}'
-      - name: Trigger TinyFS repo build on Github Actions
-        run: |
-          curl -X POST \
-          -H "Authorization: Bearer ${{secrets.GHA_ACCESS_TOKEN}}" \
-          -H "Accept: application/vnd.github.v3+json" \
-          https://api.github.com/repos/tinygo-org/tinyfs/actions/workflows/build.yml/dispatches \
-          -d '{"ref": "dev"}'
-      - name: Trigger TinyFont repo build on Github Actions
-        run: |
-          curl -X POST \
-          -H "Authorization: Bearer ${{secrets.GHA_ACCESS_TOKEN}}" \
-          -H "Accept: application/vnd.github.v3+json" \
-          https://api.github.com/repos/tinygo-org/tinyfont/actions/workflows/build.yml/dispatches \
-          -d '{"ref": "dev"}'
-      - name: Trigger TinyDraw repo build on Github Actions
-        run: |
-          curl -X POST \
-          -H "Authorization: Bearer ${{secrets.GHA_ACCESS_TOKEN}}" \
-          -H "Accept: application/vnd.github.v3+json" \
-          https://api.github.com/repos/tinygo-org/tinydraw/actions/workflows/build.yml/dispatches \
-          -d '{"ref": "dev"}'
-      - name: Trigger TinyTerm repo build on Github Actions
-        run: |
-          curl -X POST \
-          -H "Authorization: Bearer ${{secrets.GHA_ACCESS_TOKEN}}" \
-          -H "Accept: application/vnd.github.v3+json" \
-          https://api.github.com/repos/tinygo-org/tinyterm/actions/workflows/build.yml/dispatches \
-          -d '{"ref": "dev"}'

.github/workflows/linux.yml

@@ -1,501 +0,0 @@
-name: Linux
-
-on:
-  pull_request:
-  push:
-    branches:
-      - dev
-      - release
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build-linux:
-    # Build Linux binaries, ready for release.
-    # This runs inside an Alpine Linux container so we can more easily create a
-    # statically linked binary.
-    runs-on: ubuntu-latest
-    container:
-      image: golang:1.20-alpine
-    steps:
-      - name: Install apk dependencies
-        # tar: needed for actions/cache@v3
-        # git+openssh: needed for checkout (I think?)
-        # ruby: needed to install fpm
-        run: apk add tar git openssh make g++ ruby
-      - name: Work around CVE-2022-24765
-        # We're not on a multi-user machine, so this is safe.
-        run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
-      - name: Checkout
-        uses: actions/checkout@v3
-        with:
-          submodules: true
-      - name: Cache Go
-        uses: actions/cache@v3
-        with:
-          key: go-cache-linux-alpine-v1-${{ hashFiles('go.mod') }}
-          path: |
-            ~/.cache/go-build
-            ~/go/pkg/mod
-      - name: Restore LLVM source cache
-        uses: actions/cache/restore@v3
-        id: cache-llvm-source
-        with:
-          key: llvm-source-15-linux-alpine-v3
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Download LLVM source
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        run: make llvm-source
-      - name: Save LLVM source cache
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Restore LLVM build cache
-        uses: actions/cache/restore@v3
-        id: cache-llvm-build
-        with:
-          key: llvm-build-15-linux-alpine-v4
-          path: llvm-build
-      - name: Build LLVM
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        run: |
-          # fetch LLVM source
-          rm -rf llvm-project
-          make llvm-source
-          # install dependencies
-          apk add cmake samurai python3
-          # build!
-          make llvm-build
-          # Remove unnecessary object files (to reduce cache size).
-          find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
-      - name: Save LLVM build cache
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
-          path: llvm-build
-      - name: Cache Binaryen
-        uses: actions/cache@v3
-        id: cache-binaryen
-        with:
-          key: binaryen-linux-alpine-v1
-          path: build/wasm-opt
-      - name: Build Binaryen
-        if: steps.cache-binaryen.outputs.cache-hit != 'true'
-        run: |
-          apk add cmake samurai python3
-          make binaryen STATIC=1
-      - name: Cache wasi-libc
-        uses: actions/cache@v3
-        id: cache-wasi-libc
-        with:
-          key: wasi-libc-sysroot-linux-alpine-v1
-          path: lib/wasi-libc/sysroot
-      - name: Build wasi-libc
-        if: steps.cache-wasi-libc.outputs.cache-hit != 'true'
-        run: make wasi-libc
-      - name: Install fpm
-        run: |
-          gem install --version 4.0.7 public_suffix
-          gem install --version 2.7.6 dotenv
-          gem install --no-document fpm
-      - name: Build TinyGo release
-        run: |
-          make release deb -j3 STATIC=1
-          cp -p build/release.tar.gz /tmp/tinygo.linux-amd64.tar.gz
-          cp -p build/release.deb    /tmp/tinygo_amd64.deb
-      - name: Publish release artifact
-        uses: actions/upload-artifact@v3
-        with:
-          name: linux-amd64-double-zipped
-          path: |
-            /tmp/tinygo.linux-amd64.tar.gz
-            /tmp/tinygo_amd64.deb
-  test-linux-build:
-    # Test the binaries built in the build-linux job by running the smoke tests.
-    runs-on: ubuntu-latest
-    needs: build-linux
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-          cache: true
-      - name: Install wasmtime
-        run: |
-          mkdir -p $HOME/.wasmtime $HOME/.wasmtime/bin
-          curl https://github.com/bytecodealliance/wasmtime/releases/download/v5.0.0/wasmtime-v5.0.0-x86_64-linux.tar.xz -o wasmtime-v5.0.0-x86_64-linux.tar.xz -SfL
-          tar -C $HOME/.wasmtime/bin --wildcards -xf wasmtime-v5.0.0-x86_64-linux.tar.xz --strip-components=1 wasmtime-v5.0.0-x86_64-linux/*
-          echo "$HOME/.wasmtime/bin" >> $GITHUB_PATH
-      - name: Download release artifact
-        uses: actions/download-artifact@v3
-        with:
-          name: linux-amd64-double-zipped
-      - name: Extract release tarball
-        run: |
-          mkdir -p ~/lib
-          tar -C ~/lib -xf tinygo.linux-amd64.tar.gz
-          ln -s ~/lib/tinygo/bin/tinygo ~/go/bin/tinygo
-      - run: make tinygo-test-wasi-fast
-      - run: make smoketest
-  assert-test-linux:
-    # Run all tests that can run on Linux, with LLVM assertions enabled to catch
-    # potential bugs.
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-        with:
-          submodules: true
-      - name: Install apt dependencies
-        run: |
-          echo "Show cpuinfo; sometimes useful when troubleshooting"
-          cat /proc/cpuinfo
-          sudo apt-get update
-          sudo apt-get install --no-install-recommends \
-              qemu-system-arm \
-              qemu-system-riscv32 \
-              qemu-user \
-              simavr \
-              ninja-build
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-          cache: true
-      - name: Install Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: '14'
-      - name: Install wasmtime
-        run: |
-          mkdir -p $HOME/.wasmtime $HOME/.wasmtime/bin
-          curl -L https://github.com/bytecodealliance/wasmtime/releases/download/v5.0.0/wasmtime-v5.0.0-x86_64-linux.tar.xz -o wasmtime-v5.0.0-x86_64-linux.tar.xz -SfL
-          tar -C $HOME/.wasmtime/bin --wildcards -xf wasmtime-v5.0.0-x86_64-linux.tar.xz --strip-components=1 wasmtime-v5.0.0-x86_64-linux/*
-          echo "$HOME/.wasmtime/bin" >> $GITHUB_PATH
-      - name: Restore LLVM source cache
-        uses: actions/cache/restore@v3
-        id: cache-llvm-source
-        with:
-          key: llvm-source-15-linux-asserts-v3
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Download LLVM source
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        run: make llvm-source
-      - name: Save LLVM source cache
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Restore LLVM build cache
-        uses: actions/cache/restore@v3
-        id: cache-llvm-build
-        with:
-          key: llvm-build-15-linux-asserts-v4
-          path: llvm-build
-      - name: Build LLVM
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        run: |
-          # fetch LLVM source
-          rm -rf llvm-project
-          make llvm-source
-          # build!
-          make llvm-build ASSERT=1
-          # Remove unnecessary object files (to reduce cache size).
-          find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
-      - name: Save LLVM build cache
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
-          path: llvm-build
-      - name: Cache Binaryen
-        uses: actions/cache@v3
-        id: cache-binaryen
-        with:
-          key: binaryen-linux-asserts-v1
-          path: build/wasm-opt
-      - name: Build Binaryen
-        if: steps.cache-binaryen.outputs.cache-hit != 'true'
-        run: make binaryen
-      - name: Cache wasi-libc
-        uses: actions/cache@v3
-        id: cache-wasi-libc
-        with:
-          key: wasi-libc-sysroot-linux-asserts-v5
-          path: lib/wasi-libc/sysroot
-      - name: Build wasi-libc
-        if: steps.cache-wasi-libc.outputs.cache-hit != 'true'
-        run: make wasi-libc
-      - run: make gen-device -j4
-      - name: Test TinyGo
-        run: make ASSERT=1 test
-      - name: Build TinyGo
-        run: |
-          make ASSERT=1
-          echo "$(pwd)/build" >> $GITHUB_PATH
-      - name: Test stdlib packages
-        run: make tinygo-test
-      - run: make smoketest
-      - run: make wasmtest
-      - run: make tinygo-baremetal
-  build-linux-arm:
-    # Build ARM Linux binaries, ready for release.
-    # This intentionally uses an older Linux image, so that we compile against
-    # an older glibc version and therefore are compatible with a wide range of
-    # Linux distributions.
-    # It is set to "needs: build-linux" because it modifies the release created
-    # in that process to avoid doing lots of duplicate work and to avoid
-    # complications around precompiled libraries such as compiler-rt shipped as
-    # part of the release tarball.
-    runs-on: ubuntu-20.04
-    needs: build-linux
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install apt dependencies
-        run: |
-          sudo apt-get update
-          sudo apt-get install --no-install-recommends \
-              qemu-user \
-              g++-arm-linux-gnueabihf \
-              libc6-dev-armhf-cross
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-          cache: true
-      - name: Restore LLVM source cache
-        uses: actions/cache/restore@v3
-        id: cache-llvm-source
-        with:
-          key: llvm-source-15-linux-v3
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Download LLVM source
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        run: make llvm-source
-      - name: Save LLVM source cache
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Restore LLVM build cache
-        uses: actions/cache/restore@v3
-        id: cache-llvm-build
-        with:
-          key: llvm-build-15-linux-arm-v4
-          path: llvm-build
-      - name: Build LLVM
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        run: |
-          # fetch LLVM source
-          rm -rf llvm-project
-          make llvm-source
-          # Install build dependencies.
-          sudo apt-get install --no-install-recommends ninja-build
-          # build!
-          make llvm-build CROSS=arm-linux-gnueabihf
-          # Remove unnecessary object files (to reduce cache size).
-          find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
-      - name: Save LLVM build cache
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
-          path: llvm-build
-      - name: Cache Binaryen
-        uses: actions/cache@v3
-        id: cache-binaryen
-        with:
-          key: binaryen-linux-arm-v1
-          path: build/wasm-opt
-      - name: Build Binaryen
-        if: steps.cache-binaryen.outputs.cache-hit != 'true'
-        run: |
-          sudo apt-get install --no-install-recommends ninja-build
-          git submodule update --init lib/binaryen
-          make CROSS=arm-linux-gnueabihf binaryen
-      - name: Install fpm
-        run: |
-          sudo gem install --version 4.0.7 public_suffix
-          sudo gem install --version 2.7.6 dotenv
-          sudo gem install --no-document fpm
-      - name: Build TinyGo binary
-        run: |
-          make CROSS=arm-linux-gnueabihf
-      - name: Download amd64 release
-        uses: actions/download-artifact@v3
-        with:
-          name: linux-amd64-double-zipped
-      - name: Extract amd64 release
-        run: |
-          mkdir -p build/release
-          tar -xf tinygo.linux-amd64.tar.gz -C build/release tinygo
-      - name: Modify release
-        run: |
-          cp -p build/tinygo   build/release/tinygo/bin
-          cp -p build/wasm-opt build/release/tinygo/bin
-      - name: Create arm release
-        run: |
-          make release deb RELEASEONLY=1 DEB_ARCH=armhf
-          cp -p build/release.tar.gz /tmp/tinygo.linux-arm.tar.gz
-          cp -p build/release.deb    /tmp/tinygo_armhf.deb
-      - name: Publish release artifact
-        uses: actions/upload-artifact@v3
-        with:
-          name: linux-arm-double-zipped
-          path: |
-            /tmp/tinygo.linux-arm.tar.gz
-            /tmp/tinygo_armhf.deb
-  build-linux-arm64:
-    # Build ARM64 Linux binaries, ready for release.
-    # It is set to "needs: build-linux" because it modifies the release created
-    # in that process to avoid doing lots of duplicate work and to avoid
-    # complications around precompiled libraries such as compiler-rt shipped as
-    # part of the release tarball.
-    runs-on: ubuntu-20.04
-    needs: build-linux
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install apt dependencies
-        run: |
-          sudo apt-get update
-          sudo apt-get install --no-install-recommends \
-              qemu-user \
-              g++-aarch64-linux-gnu \
-              libc6-dev-arm64-cross \
-              ninja-build
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-          cache: true
-      - name: Restore LLVM source cache
-        uses: actions/cache/restore@v3
-        id: cache-llvm-source
-        with:
-          key: llvm-source-15-linux-v3
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Download LLVM source
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        run: make llvm-source
-      - name: Save LLVM source cache
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Restore LLVM build cache
-        uses: actions/cache/restore@v3
-        id: cache-llvm-build
-        with:
-          key: llvm-build-15-linux-arm64-v4
-          path: llvm-build
-      - name: Build LLVM
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        run: |
-          # fetch LLVM source
-          rm -rf llvm-project
-          make llvm-source
-          # build!
-          make llvm-build CROSS=aarch64-linux-gnu
-          # Remove unnecessary object files (to reduce cache size).
-          find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
-      - name: Save LLVM build cache
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
-          path: llvm-build
-      - name: Cache Binaryen
-        uses: actions/cache@v3
-        id: cache-binaryen
-        with:
-          key: binaryen-linux-arm64-v1
-          path: build/wasm-opt
-      - name: Build Binaryen
-        if: steps.cache-binaryen.outputs.cache-hit != 'true'
-        run: |
-          git submodule update --init lib/binaryen
-          make CROSS=aarch64-linux-gnu binaryen
-      - name: Install fpm
-        run: |
-          sudo gem install --version 4.0.7 public_suffix
-          sudo gem install --version 2.7.6 dotenv
-          sudo gem install --no-document fpm
-      - name: Build TinyGo binary
-        run: |
-          make CROSS=aarch64-linux-gnu
-      - name: Download amd64 release
-        uses: actions/download-artifact@v3
-        with:
-          name: linux-amd64-double-zipped
-      - name: Extract amd64 release
-        run: |
-          mkdir -p build/release
-          tar -xf tinygo.linux-amd64.tar.gz -C build/release tinygo
-      - name: Modify release
-        run: |
-          cp -p build/tinygo   build/release/tinygo/bin
-          cp -p build/wasm-opt build/release/tinygo/bin
-      - name: Create arm64 release
-        run: |
-          make release deb RELEASEONLY=1 DEB_ARCH=arm64
-          cp -p build/release.tar.gz /tmp/tinygo.linux-arm64.tar.gz
-          cp -p build/release.deb    /tmp/tinygo_arm64.deb
-      - name: Publish release artifact
-        uses: actions/upload-artifact@v3
-        with:
-          name: linux-arm64-double-zipped
-          path: |
-            /tmp/tinygo.linux-arm64.tar.gz
-            /tmp/tinygo_arm64.deb

.github/workflows/llvm.yml

@@ -1,63 +0,0 @@
-# This is the Github action to build and push the LLVM Docker image
-# used by the tinygo/tinygo-dev Docker image.
-#
-# It only needs to be rebuilt when updating the LLVM version.
-#
-# To update, make any needed changes to this file,
-# then push to the "build-llvm-image" branch.
-#
-# The needed image will be rebuilt, which will very likely take at least 1-2 hours.
-name: LLVM
-on:
-  push:
-    branches: [ build-llvm-image ]
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build-push-llvm:
-    name: build-push-llvm
-    runs-on: ubuntu-latest
-    permissions:
-      packages: write
-      contents: read
-    steps:
-      - name: Check out the repo
-        uses: actions/checkout@v3
-        with:
-          submodules: recursive
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-      - name: Docker meta
-        id: meta
-        uses: docker/metadata-action@v4
-        with:
-          images: |
-            tinygo/llvm-15
-            ghcr.io/${{ github.repository_owner }}/llvm-15
-          tags: |
-            type=sha,format=long
-            type=raw,value=latest
-      - name: Log in to Docker Hub
-        uses: docker/login-action@v2
-        with:
-          username: ${{ secrets.DOCKER_HUB_USERNAME }}
-          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
-      - name: Log in to Github Container Registry
-        uses: docker/login-action@v2
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Build and push
-        uses: docker/build-push-action@v4
-        with:
-          target: tinygo-llvm-build
-          context: .
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max

.github/workflows/windows.yml

@@ -1,224 +0,0 @@
-name: Windows
-
-on:
-  pull_request:
-  push:
-    branches:
-      - dev
-      - release
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build-windows:
-    runs-on: windows-2022
-    steps:
-      - name: Configure pagefile
-        uses: al-cheb/configure-pagefile-action@v1.3
-        with:
-          minimum-size: 8GB
-          maximum-size: 24GB
-          disk-root: "C:"
-      - uses: brechtm/setup-scoop@v2
-        with:
-          scoop_update: 'false'
-      - name: Install Dependencies
-        shell: bash
-        run: |
-          scoop install ninja binaryen
-      - name: Checkout
-        uses: actions/checkout@v3
-        with:
-          submodules: true
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-          cache: true
-      - name: Restore cached LLVM source
-        uses: actions/cache/restore@v3
-        id: cache-llvm-source
-        with:
-          key: llvm-source-15-windows-v4
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Download LLVM source
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        run: make llvm-source
-      - name: Save cached LLVM source
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Restore cached LLVM build
-        uses: actions/cache/restore@v3
-        id: cache-llvm-build
-        with:
-          key: llvm-build-15-windows-v6
-          path: llvm-build
-      - name: Build LLVM
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        shell: bash
-        run: |
-          # fetch LLVM source
-          rm -rf llvm-project
-          make llvm-source
-          # build!
-          make llvm-build CCACHE=OFF
-          # Remove unnecessary object files (to reduce cache size).
-          find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;
-      - name: Save cached LLVM build
-        uses: actions/cache/save@v3
-        if: steps.cache-llvm-build.outputs.cache-hit != 'true'
-        with:
-          key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
-          path: llvm-build
-      - name: Cache wasi-libc sysroot
-        uses: actions/cache@v3
-        id: cache-wasi-libc
-        with:
-          key: wasi-libc-sysroot-v4
-          path: lib/wasi-libc/sysroot
-      - name: Build wasi-libc
-        if: steps.cache-wasi-libc.outputs.cache-hit != 'true'
-        run: make wasi-libc
-      - name: Install wasmtime
-        run: |
-          scoop install wasmtime
-      - name: make gen-device
-        run: make -j3 gen-device
-      - name: Test TinyGo
-        shell: bash
-        run: make test GOTESTFLAGS="-short"
-      - name: Build TinyGo release tarball
-        shell: bash
-        run: make build/release -j4
-      - name: Make release artifact
-        shell: bash
-        working-directory: build/release
-        run: 7z -tzip a release.zip tinygo
-      - name: Publish release artifact
-        # Note: this release artifact is double-zipped, see:
-        # https://github.com/actions/upload-artifact/issues/39
-        # We can essentially pick one of these:
-        # - have a dobule-zipped artifact when downloaded from the UI
-        # - have a very slow artifact upload
-        # We're doing the former here, to keep artifact uploads fast.
-        uses: actions/upload-artifact@v3
-        with:
-          name: release-double-zipped
-          path: build/release/release.zip
-
-  smoke-test-windows:
-    runs-on: windows-2022
-    needs: build-windows
-    steps:
-      - name: Configure pagefile
-        uses: al-cheb/configure-pagefile-action@v1.3
-        with:
-          minimum-size: 8GB
-          maximum-size: 24GB
-          disk-root: "C:"
-      - uses: brechtm/setup-scoop@v2
-        with:
-          scoop_update: 'false'
-      - name: Install Dependencies
-        shell: bash
-        run: |
-          scoop install binaryen
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-          cache: true
-      - name: Download TinyGo build
-        uses: actions/download-artifact@v2
-        with:
-          name: release-double-zipped
-          path: build/
-      - name: Unzip TinyGo build
-        shell: bash
-        working-directory: build
-        run: 7z x release.zip -r
-      - name: Smoke tests
-        shell: bash
-        run: make smoketest TINYGO=$(PWD)/build/tinygo/bin/tinygo
-
-  stdlib-test-windows:
-    runs-on: windows-2022
-    needs: build-windows
-    steps:
-      - name: Configure pagefile
-        uses: al-cheb/configure-pagefile-action@v1.3
-        with:
-          minimum-size: 8GB
-          maximum-size: 24GB
-          disk-root: "C:"
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-          cache: true
-      - name: Download TinyGo build
-        uses: actions/download-artifact@v2
-        with:
-          name: release-double-zipped
-          path: build/
-      - name: Unzip TinyGo build
-        shell: bash
-        working-directory: build
-        run: 7z x release.zip -r
-      - name: Test stdlib packages
-        run: make tinygo-test TINYGO=$(PWD)/build/tinygo/bin/tinygo
-
-  stdlib-wasi-test-windows:
-    runs-on: windows-2022
-    needs: build-windows
-    steps:
-      - name: Configure pagefile
-        uses: al-cheb/configure-pagefile-action@v1.3
-        with:
-          minimum-size: 8GB
-          maximum-size: 24GB
-          disk-root: "C:"
-      - uses: brechtm/setup-scoop@v2
-        with:
-          scoop_update: 'false'
-      - name: Install Dependencies
-        shell: bash
-        run: |
-          scoop install binaryen wasmtime
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: '1.20'
-          cache: true
-      - name: Download TinyGo build
-        uses: actions/download-artifact@v2
-        with:
-          name: release-double-zipped
-          path: build/
-      - name: Unzip TinyGo build
-        shell: bash
-        working-directory: build
-        run: 7z x release.zip -r
-      - name: Test stdlib packages on wasi
-        run: make tinygo-test-wasi-fast TINYGO=$(PWD)/build/tinygo/bin/tinygo

.gitignore

@@ -1,34 +1,12 @@
+build
 docs/_build
 src/device/avr/*.go
 src/device/avr/*.ld
 src/device/avr/*.s
-src/device/esp/*.go
 src/device/nrf/*.go
 src/device/nrf/*.s
-src/device/nxp/*.go
-src/device/nxp/*.s
-src/device/sam/*.go
-src/device/sam/*.s
-src/device/sifive/*.go
-src/device/sifive/*.s
 src/device/stm32/*.go
 src/device/stm32/*.s
-src/device/kendryte/*.go
-src/device/kendryte/*.s
-src/device/rp/*.go
-src/device/rp/*.s
+src/device/sam/*.go
+src/device/sam/*.s
 vendor
-llvm-build
-llvm-project
-build/*
-
-# Ignore files generated by smoketest
-test
-test.bin
-test.elf
-test.exe
-test.gba
-test.hex
-test.nro
-test.wasm
-wasm.wasm

.gitmodules

@@ -9,25 +9,8 @@
 	url = https://github.com/avr-rust/avr-mcu.git
 [submodule "lib/cmsis-svd"]
 	path = lib/cmsis-svd
-	url = https://github.com/tinygo-org/cmsis-svd
-[submodule "lib/wasi-libc"]
-	path = lib/wasi-libc
-	url = https://github.com/CraneStation/wasi-libc
-[submodule "lib/picolibc"]
-	path = lib/picolibc
-	url = https://github.com/keith-packard/picolibc.git
-[submodule "lib/stm32-svd"]
-	path = lib/stm32-svd
-	url = https://github.com/tinygo-org/stm32-svd
-[submodule "lib/musl"]
-	path = lib/musl
-	url = git://git.musl-libc.org/musl
-[submodule "lib/binaryen"]
-	path = lib/binaryen
-	url = https://github.com/WebAssembly/binaryen.git
-[submodule "lib/mingw-w64"]
-	path = lib/mingw-w64
-	url = https://github.com/mingw-w64/mingw-w64.git
-[submodule "lib/macos-minimal-sdk"]
-	path = lib/macos-minimal-sdk
-	url = https://github.com/aykevl/macos-minimal-sdk.git
+	url = https://github.com/posborne/cmsis-svd
+[submodule "lib/compiler-rt"]
+	path = lib/compiler-rt
+	url = https://github.com/llvm-mirror/compiler-rt.git
+	branch = release_70

.travis.yml

@@ -0,0 +1,33 @@
+language: go
+
+go:
+  - "1.11"
+
+before_install:
+  - echo "deb http://apt.llvm.org/trusty/ llvm-toolchain-trusty-7 main"            | sudo tee -a /etc/apt/sources.list
+  - echo "deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu trusty main" | sudo tee -a /etc/apt/sources.list
+  - sudo apt-get update -qq
+  - sudo apt-get install llvm-7-dev clang-7 libclang-7-dev binutils-arm-none-eabi qemu-system-arm --allow-unauthenticated -y
+  - sudo ln -s /usr/bin/clang-7 /usr/local/bin/cc # work around missing -no-pie in old GCC version
+
+install:
+  - curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
+  - dep ensure --vendor-only
+
+script:
+  - go install github.com/aykevl/tinygo
+  - go test -v .
+  - make gen-device
+  - tinygo build -o blinky1.nrf.elf    -target=pca10040     examples/blinky1
+  - tinygo build -o blinky2.nrf.elf    -target=pca10040     examples/blinky2
+  - tinygo build -o blinky2                                 examples/blinky2
+  - tinygo build -o test.nrf.elf       -target=pca10040     examples/test
+  - tinygo build -o blinky1.nrf51.elf  -target=microbit     examples/echo
+  - tinygo build -o test.nrf.elf       -target=nrf52840-mdk examples/blinky1
+  - tinygo build -o blinky1.nrf51d.elf -target=pca10031     examples/blinky1
+  - tinygo build -o blinky1.stm32.elf  -target=bluepill     examples/blinky1
+  - tinygo build -o blinky1.avr.o      -target=arduino      examples/blinky1 # TODO: avr-as/avr-gcc doesn't work
+  - tinygo build -o blinky1.reel.elf   -target=reelboard    examples/blinky1
+  - tinygo build -o blinky2.reel.elf   -target=reelboard    examples/blinky2
+  - tinygo build -o blinky1.pca10056.elf    -target=pca10056     examples/blinky1
+  - tinygo build -o blinky2.pca10056.elf    -target=pca10056     examples/blinky2

BUILDING.md

@@ -1,96 +0,0 @@
-# Building TinyGo
-
-TinyGo depends on LLVM and libclang, which are both big C++ libraries. It can
-also optionally use a built-in lld to ease cross compiling. There are two ways
-these can be linked: dynamically and statically. An install with `go install` is
-dynamic linking because it is fast and works almost out of the box on
-Debian-based systems with the right packages installed.
-
-This guide describes how to statically link TinyGo against LLVM, libclang and
-lld so that the binary can be easily moved between systems. It also shows how to
-build a release tarball that includes this binary and all necessary extra files.
-
-**Note**: this documentation describes how to build a statically linked release
-tarball. If you want to help with development of TinyGo itself, you should follow the guide located at https://tinygo.org/docs/guides/build/
-
-## Dependencies
-
-LLVM, Clang and LLD are quite light on dependencies, requiring only standard
-build tools to be built. Go is of course necessary to build TinyGo itself.
-
-  * Go (1.18+)
-  * Standard build tools (gcc/clang)
-  * git
-  * CMake
-  * [Ninja](https://ninja-build.org/)
-
-The rest of this guide assumes you're running Linux, but it should be equivalent
-on a different system like Mac.
-
-## Download the source
-
-The first step is to download the TinyGo sources (use `--recursive` if you clone
-the git repository). Then, inside the directory, download the LLVM source:
-
-    make llvm-source
-
-You can also store LLVM outside of the TinyGo root directory by setting the
-`LLVM_BUILDDIR`, `CLANG_SRC` and `LLD_SRC` make variables, but that is not
-covered by this guide.
-
-## Build LLVM, Clang, LLD
-
-Before starting the build, you may want to set the following environment
-variables to speed up the build. Most Linux distributions ship with GCC as the
-default compiler, but Clang is significantly faster and uses much less memory
-while producing binaries that are about as fast.
-
-    export CC=clang
-    export CXX=clang++
-
-The Makefile includes a default configuration that is good for most users. It
-builds a release version of LLVM (optimized, no asserts) and includes all
-targets supported by TinyGo:
-
-    make llvm-build
-
-This can take over an hour depending on the speed of your system.
-
-## Build TinyGo
-
-The last step of course is to build TinyGo itself. This can again be done with
-make:
-
-    make
-
-## Verify TinyGo
-
-Try running TinyGo:
-
-    ./build/tinygo help
-
-Also, make sure the `tinygo` binary really is statically linked. Check this
-using `ldd` (not to be confused with `lld`):
-
-    ldd ./build/tinygo
-
-The result should not contain libclang or libLLVM.
-
-## Make a release tarball
-
-Now that we have a working static build, it's time to make a release tarball:
-
-    make release
-
-If you did not clone the repository with the `--recursive` option, you will get errors until you initialize the project submodules:
-
-    git submodule update --init
-
-The release tarball is stored in build/release.tar.gz, and can be extracted with
-the following command (for example in ~/lib):
-
-    tar -xvf path/to/release.tar.gz
-
-TinyGo will get extracted to a `tinygo` directory. You can then call it with:
-
-    ./tinygo/bin/tinygo

CODE-OF-CONDUCT.md

@@ -1,76 +0,0 @@
-# Contributor Covenant Code of Conduct
-
-## Our Pledge
-
-In the interest of fostering an open and welcoming environment, we as
-contributors and maintainers pledge to make participation in our project and
-our community a harassment-free experience for everyone, regardless of age, body
-size, disability, ethnicity, sex characteristics, gender identity and expression,
-level of experience, education, socio-economic status, nationality, personal
-appearance, race, religion, or sexual identity and orientation.
-
-## Our Standards
-
-Examples of behavior that contributes to creating a positive environment
-include:
-
-* Using welcoming and inclusive language
-* Being respectful of differing viewpoints and experiences
-* Gracefully accepting constructive criticism
-* Focusing on what is best for the community
-* Showing empathy towards other community members
-
-Examples of unacceptable behavior by participants include:
-
-* The use of sexualized language or imagery and unwelcome sexual attention or
-  advances
-* Trolling, insulting/derogatory comments, and personal or political attacks
-* Public or private harassment
-* Publishing others' private information, such as a physical or electronic
-  address, without explicit permission
-* Other conduct which could reasonably be considered inappropriate in a
-  professional setting
-
-## Our Responsibilities
-
-Project maintainers are responsible for clarifying the standards of acceptable
-behavior and are expected to take appropriate and fair corrective action in
-response to any instances of unacceptable behavior.
-
-Project maintainers have the right and responsibility to remove, edit, or
-reject comments, commits, code, wiki edits, issues, and other contributions
-that are not aligned to this Code of Conduct, or to ban temporarily or
-permanently any contributor for other behaviors that they deem inappropriate,
-threatening, offensive, or harmful.
-
-## Scope
-
-This Code of Conduct applies within all project spaces, and it also applies when
-an individual is representing the project or its community in public spaces.
-Examples of representing a project or community include using an official
-project e-mail address, posting via an official social media account, or acting
-as an appointed representative at an online or offline event. Representation of
-a project may be further defined and clarified by project maintainers.
-
-## Enforcement
-
-Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by contacting the project team at [conduct@tinygo.org](mailto:conduct@tinygo.org). All
-complaints will be reviewed and investigated and will result in a response that
-is deemed necessary and appropriate to the circumstances. The project team is
-obligated to maintain confidentiality with regard to the reporter of an incident.
-Further details of specific enforcement policies may be posted separately.
-
-Project maintainers who do not follow or enforce the Code of Conduct in good
-faith may face temporary or permanent repercussions as determined by other
-members of the project's leadership.
-
-## Attribution
-
-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
-available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
-
-[homepage]: https://www.contributor-covenant.org
-
-For answers to common questions about this code of conduct, see
-https://www.contributor-covenant.org/faq

CONTRIBUTING.md

@@ -1 +0,0 @@
-Please take a look at our [Contributing](https://tinygo.org/docs/guides/contributing/) page on our web site for details. Thank you.

CONTRIBUTORS

@@ -1,18 +0,0 @@
-# This is the official list of TinyGo authors for copyright purposes.
-#
-# This file is not actively maintained.
-# To be included, send a change adding the individual or
-# company who owns a contribution's copyright.
-#
-# Names should be added to this file as one of
-#     Organization's name
-#     Individual's name <submission email address>
-#     Individual's name <submission email address> <email2> <emailN>
-#
-# Please keep the list sorted.
-
-Ayke van Laethem <aykevanlaethem@gmail.com>
-Daniel Esteban <conejo@conejo.me>
-Loon, LLC.
-Ron Evans <ron@hybridgroup.com>
-Nia Weiss <niaow1234@gmail.com>

Dockerfile

@@ -1,40 +1,80 @@
-# tinygo-llvm stage obtains the llvm source for TinyGo
-FROM golang:1.20 AS tinygo-llvm
+# TinyGo base stage just installs LLVM 7 and the TinyGo compiler itself.
+FROM golang:latest AS tinygo-base
 
-RUN apt-get update && \
-    apt-get install -y apt-utils make cmake clang-11 ninja-build
+RUN wget -O- https://apt.llvm.org/llvm-snapshot.gpg.key| apt-key add - && \
+    echo "deb http://apt.llvm.org/stretch/ llvm-toolchain-stretch-7 main" >> /etc/apt/sources.list && \
+    apt-get update && \
+    apt-get install -y llvm-7-dev libclang-7-dev
 
-COPY ./Makefile /tinygo/Makefile
+RUN wget -O- https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
 
-RUN cd /tinygo/ && \
-    make llvm-source
+COPY . /go/src/github.com/aykevl/tinygo
 
-# tinygo-llvm-build stage build the custom llvm with xtensa support
-FROM tinygo-llvm AS tinygo-llvm-build
+RUN cd /go/src/github.com/aykevl/tinygo/ && \
+    dep ensure --vendor-only && \
+    go install /go/src/github.com/aykevl/tinygo/
 
-RUN cd /tinygo/ && \
-    make llvm-build
+# tinygo-wasm stage installs the needed dependencies to compile TinyGo programs for WASM.
+FROM tinygo-base AS tinygo-wasm
 
-# tinygo-compiler stage builds the compiler itself
-FROM tinygo-llvm-build AS tinygo-compiler
+COPY --from=tinygo-base /go/bin/tinygo /go/bin/tinygo
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/src /go/src/github.com/aykevl/tinygo/src
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/targets /go/src/github.com/aykevl/tinygo/targets
 
-COPY . /tinygo
+RUN wget -O- https://apt.llvm.org/llvm-snapshot.gpg.key| apt-key add - && \
+    echo "deb http://apt.llvm.org/stretch/ llvm-toolchain-stretch-7 main" >> /etc/apt/sources.list && \
+    apt-get update && \
+    apt-get install -y libllvm7 lld-7
 
-# update submodules
-RUN cd /tinygo/ && \
-    rm -rf ./lib/*/ && \
-    git submodule sync && \
-    git submodule update --init --recursive --force
+# tinygo-avr stage installs the needed dependencies to compile TinyGo programs for AVR microcontrollers.
+FROM tinygo-base AS tinygo-avr
 
-RUN cd /tinygo/ && \
-    make
+COPY --from=tinygo-base /go/bin/tinygo /go/bin/tinygo
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/src /go/src/github.com/aykevl/tinygo/src
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/targets /go/src/github.com/aykevl/tinygo/targets
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/Makefile /go/src/github.com/aykevl/tinygo/
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/tools /go/src/github.com/aykevl/tinygo/tools
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/lib /go/src/github.com/aykevl/tinygo/lib
 
-# tinygo-tools stage installs the needed dependencies to compile TinyGo programs for all platforms.
-FROM tinygo-compiler AS tinygo-tools
+RUN cd /go/src/github.com/aykevl/tinygo/ && \
+    apt-get update && \
+    apt-get install -y apt-utils python3 make binutils-avr gcc-avr avr-libc && \
+    make gen-device-avr && \
+    apt-get remove -y python3 make && \
+    apt-get autoremove -y && \
+    apt-get clean
 
-RUN cd /tinygo/ && \
-    make wasi-libc binaryen && \
-    make gen-device -j4 && \
-    cp build/* $GOPATH/bin/
+# tinygo-arm stage installs the needed dependencies to compile TinyGo programs for ARM microcontrollers.
+FROM tinygo-base AS tinygo-arm
+
+COPY --from=tinygo-base /go/bin/tinygo /go/bin/tinygo
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/src /go/src/github.com/aykevl/tinygo/src
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/targets /go/src/github.com/aykevl/tinygo/targets
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/Makefile /go/src/github.com/aykevl/tinygo/
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/tools /go/src/github.com/aykevl/tinygo/tools
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/lib /go/src/github.com/aykevl/tinygo/lib
+
+RUN cd /go/src/github.com/aykevl/tinygo/ && \
+    apt-get update && \
+    apt-get install -y apt-utils python3 make binutils-arm-none-eabi clang-7 && \
+    make gen-device-nrf && make gen-device-stm32 && \
+    apt-get remove -y python3 make && \
+    apt-get autoremove -y && \
+    apt-get clean
+
+# tinygo-all stage installs the needed dependencies to compile TinyGo programs for all platforms.
+FROM tinygo-wasm AS tinygo-all
+
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/Makefile /go/src/github.com/aykevl/tinygo/
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/tools /go/src/github.com/aykevl/tinygo/tools
+COPY --from=tinygo-base /go/src/github.com/aykevl/tinygo/lib /go/src/github.com/aykevl/tinygo/lib
+
+RUN cd /go/src/github.com/aykevl/tinygo/ && \
+    apt-get update && \
+    apt-get install -y apt-utils python3 make binutils-arm-none-eabi clang-7 binutils-avr gcc-avr avr-libc && \
+    make gen-device && \
+    apt-get remove -y python3 make && \
+    apt-get autoremove -y && \
+    apt-get clean
 
 CMD ["tinygo"]

Gopkg.lock

@@ -0,0 +1,44 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  branch = "master"
+  digest = "1:f250e2a6d7e4f9ebc5ba37e5e2ec91b46eb1399ee43f2fdaeb20cd4fd1aeee59"
+  name = "github.com/aykevl/go-llvm"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "d8539684f173a591ea9474d6262ac47ef2277d64"
+
+[[projects]]
+  branch = "master"
+  digest = "1:d1102ae84d8c9318db4ce2ad2673eb2bf54569ab2a4a5d57e70d8aef726b681d"
+  name = "golang.org/x/tools"
+  packages = [
+    "go/ast/astutil",
+    "go/buildutil",
+    "go/gcexportdata",
+    "go/internal/cgo",
+    "go/internal/gcimporter",
+    "go/loader",
+    "go/packages",
+    "go/ssa",
+    "go/ssa/ssautil",
+    "go/types/typeutil",
+    "internal/fastwalk",
+    "internal/gopathwalk",
+    "internal/semver",
+  ]
+  pruneopts = "UT"
+  revision = "3e7aa9e59977626dc60433e9aeadf1bb63d28295"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  input-imports = [
+    "github.com/aykevl/go-llvm",
+    "golang.org/x/tools/go/loader",
+    "golang.org/x/tools/go/ssa",
+    "golang.org/x/tools/go/ssa/ssautil",
+  ]
+  solver-name = "gps-cdcl"
+  solver-version = 1

Gopkg.toml

@@ -0,0 +1,11 @@
+[[constraint]]
+  branch = "master"
+  name = "github.com/aykevl/go-llvm"
+
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/tools"
+
+[prune]
+  go-tests = true
+  unused-packages = true

LICENSE

@@ -1,10 +1,4 @@
-Copyright (c) 2018-2022 The TinyGo Authors. All rights reserved.
-
-TinyGo includes portions of the Go standard library.
-Copyright (c) 2009-2022 The Go Authors. All rights reserved.
-
-TinyGo includes portions of LLVM, which is under the Apache License v2.0 with
-LLVM Exceptions. See https://llvm.org/LICENSE.txt for license information.
+Copyright (c) 2018 Ayke van Laethem. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are

Makefile

@@ -1,852 +1,113 @@
 
 # aliases
-all: tinygo
+all: tgo
+tgo: build/tgo
 
-# Default build and source directories, as created by `make llvm-build`.
-LLVM_BUILDDIR ?= llvm-build
-LLVM_PROJECTDIR ?= llvm-project
-CLANG_SRC ?= $(LLVM_PROJECTDIR)/clang
-LLD_SRC ?= $(LLVM_PROJECTDIR)/lld
+.PHONY: all tgo run-test run-blinky run-blinky2 clean fmt gen-device gen-device-nrf gen-device-avr
 
-# Try to autodetect LLVM build tools.
-# Versions are listed here in descending priority order.
-LLVM_VERSIONS = 15 14 13 12 11
-errifempty = $(if $(1),$(1),$(error $(2)))
-detect = $(shell which $(call errifempty,$(firstword $(foreach p,$(2),$(shell command -v $(p) 2> /dev/null && echo $(p)))),failed to locate $(1) at any of: $(2)))
-toolSearchPathsVersion = $(1)-$(2)
-ifeq ($(shell uname -s),Darwin)
-	# Also explicitly search Brew's copy, which is not in PATH by default.
-	BREW_PREFIX := $(shell brew --prefix)
-	toolSearchPathsVersion += $(BREW_PREFIX)/opt/llvm@$(2)/bin/$(1)-$(2) $(BREW_PREFIX)/opt/llvm@$(2)/bin/$(1)
-endif
-# First search for a custom built copy, then move on to explicitly version-tagged binaries, then just see if the tool is in path with its normal name.
-findLLVMTool = $(call detect,$(1),$(abspath llvm-build/bin/$(1)) $(foreach ver,$(LLVM_VERSIONS),$(call toolSearchPathsVersion,$(1),$(ver))) $(1))
-CLANG ?= $(call findLLVMTool,clang)
-LLVM_AR ?= $(call findLLVMTool,llvm-ar)
-LLVM_NM ?= $(call findLLVMTool,llvm-nm)
+TARGET ?= unix
 
-# Go binary and GOROOT to select
-GO ?= go
-export GOROOT = $(shell $(GO) env GOROOT)
+ifeq ($(TARGET),unix)
+# Regular *nix system.
 
-# Flags to pass to go test.
-GOTESTFLAGS ?=
+else ifeq ($(TARGET),pca10040)
+# PCA10040: nRF52832 development board
+OBJCOPY = arm-none-eabi-objcopy
+TGOFLAGS += -target $(TARGET)
 
-# md5sum binary
-MD5SUM = md5sum
+else ifeq ($(TARGET),microbit)
+# BBC micro:bit
+OBJCOPY = arm-none-eabi-objcopy
+TGOFLAGS += -target $(TARGET)
 
-# tinygo binary for tests
-TINYGO ?= $(call detect,tinygo,tinygo $(CURDIR)/build/tinygo)
+else ifeq ($(TARGET),reelboard)
+# reel board
+OBJCOPY = arm-none-eabi-objcopy
+TGOFLAGS += -target $(TARGET)
 
-# Check for ccache if the user hasn't set it to on or off.
-ifeq (, $(CCACHE))
-    # Use CCACHE for LLVM if possible
-    ifneq (, $(shell command -v ccache 2> /dev/null))
-        CCACHE := ON
-    else
-        CCACHE := OFF
-    endif
-endif
-LLVM_OPTION += '-DLLVM_CCACHE_BUILD=$(CCACHE)'
+else ifeq ($(TARGET),bluepill)
+# "blue pill" development board
+# See: https://wiki.stm32duino.com/index.php?title=Blue_Pill
+OBJCOPY = arm-none-eabi-objcopy
+TGOFLAGS += -target $(TARGET)
+
+else ifeq ($(TARGET),arduino)
+OBJCOPY = avr-objcopy
+TGOFLAGS += -target $(TARGET)
 
-# Allow enabling LLVM assertions
-ifeq (1, $(ASSERT))
-    LLVM_OPTION += '-DLLVM_ENABLE_ASSERTIONS=ON'
 else
-    LLVM_OPTION += '-DLLVM_ENABLE_ASSERTIONS=OFF'
+$(error Unknown target)
+
 endif
 
-# Enable AddressSanitizer
-ifeq (1, $(ASAN))
-    LLVM_OPTION += -DLLVM_USE_SANITIZER=Address
-    CGO_LDFLAGS += -fsanitize=address
-endif
 
-ifeq (1, $(STATIC))
-    # Build TinyGo as a fully statically linked binary (no dynamically loaded
-    # libraries such as a libc). This is not supported with glibc which is used
-    # on most major Linux distributions. However, it is supported in Alpine
-    # Linux with musl.
-    CGO_LDFLAGS += -static
-    # Also set the thread stack size to 1MB. This is necessary on musl as the
-    # default stack size is 128kB and LLVM uses more than that.
-    # For more information, see:
-    # https://wiki.musl-libc.org/functional-differences-from-glibc.html#Thread-stack-size
-    CGO_LDFLAGS += -Wl,-z,stack-size=1048576
-    # Build wasm-opt with static linking.
-    # For details, see:
-    # https://github.com/WebAssembly/binaryen/blob/version_102/.github/workflows/ci.yml#L181
-    BINARYEN_OPTION += -DCMAKE_CXX_FLAGS="-static" -DCMAKE_C_FLAGS="-static"
-endif
 
-# Cross compiling support.
-ifneq ($(CROSS),)
-    CC = $(CROSS)-gcc
-    CXX = $(CROSS)-g++
-    LLVM_OPTION += \
-        -DCMAKE_C_COMPILER=$(CC) \
-        -DCMAKE_CXX_COMPILER=$(CXX) \
-        -DLLVM_DEFAULT_TARGET_TRIPLE=$(CROSS) \
-        -DCROSS_TOOLCHAIN_FLAGS_NATIVE="-UCMAKE_C_COMPILER;-UCMAKE_CXX_COMPILER"
-    ifeq ($(CROSS), arm-linux-gnueabihf)
-        # Assume we're building on a Debian-like distro, with QEMU installed.
-        LLVM_CONFIG_PREFIX = qemu-arm -L /usr/arm-linux-gnueabihf/
-        # The CMAKE_SYSTEM_NAME flag triggers cross compilation mode.
-        LLVM_OPTION += \
-            -DCMAKE_SYSTEM_NAME=Linux \
-            -DLLVM_TARGET_ARCH=ARM
-        GOENVFLAGS = GOARCH=arm CC=$(CC) CXX=$(CXX) CGO_ENABLED=1
-        BINARYEN_OPTION += -DCMAKE_C_COMPILER=$(CC) -DCMAKE_CXX_COMPILER=$(CXX)
-    else ifeq ($(CROSS), aarch64-linux-gnu)
-        # Assume we're building on a Debian-like distro, with QEMU installed.
-        LLVM_CONFIG_PREFIX = qemu-aarch64 -L /usr/aarch64-linux-gnu/
-        # The CMAKE_SYSTEM_NAME flag triggers cross compilation mode.
-        LLVM_OPTION += \
-            -DCMAKE_SYSTEM_NAME=Linux \
-            -DLLVM_TARGET_ARCH=AArch64
-        GOENVFLAGS = GOARCH=arm64 CC=$(CC) CXX=$(CXX) CGO_ENABLED=1
-        BINARYEN_OPTION += -DCMAKE_C_COMPILER=$(CC) -DCMAKE_CXX_COMPILER=$(CXX)
-    else
-        $(error Unknown cross compilation target: $(CROSS))
-    endif
-endif
+run-test: build/test
+	./build/test
 
-.PHONY: all tinygo test $(LLVM_BUILDDIR) llvm-source clean fmt gen-device gen-device-nrf gen-device-nxp gen-device-avr gen-device-rp
+run-blinky: run-blinky2
+run-blinky2: build/blinky2
+	./build/blinky2
 
-LLVM_COMPONENTS = all-targets analysis asmparser asmprinter bitreader bitwriter codegen core coroutines coverage debuginfodwarf debuginfopdb executionengine frontendopenmp instrumentation interpreter ipo irreader libdriver linker lto mc mcjit objcarcopts option profiledata scalaropts support target windowsdriver windowsmanifest
-
-ifeq ($(OS),Windows_NT)
-    EXE = .exe
-    START_GROUP = -Wl,--start-group
-    END_GROUP = -Wl,--end-group
-
-    # PIC needs to be disabled for libclang to work.
-    LLVM_OPTION += -DLLVM_ENABLE_PIC=OFF
-
-    CGO_CPPFLAGS += -DCINDEX_NO_EXPORTS
-    CGO_LDFLAGS += -static -static-libgcc -static-libstdc++
-    CGO_LDFLAGS_EXTRA += -lversion
-
-    USE_SYSTEM_BINARYEN ?= 1
-
-else ifeq ($(shell uname -s),Darwin)
-    MD5SUM = md5
-
-    CGO_LDFLAGS += -lxar
-
-    USE_SYSTEM_BINARYEN ?= 1
-
-else ifeq ($(shell uname -s),FreeBSD)
-    MD5SUM = md5
-    START_GROUP = -Wl,--start-group
-    END_GROUP = -Wl,--end-group
-else
-    START_GROUP = -Wl,--start-group
-    END_GROUP = -Wl,--end-group
-endif
-
-# Libraries that should be linked in for the statically linked Clang.
-CLANG_LIB_NAMES = clangAnalysis clangAST clangASTMatchers clangBasic clangCodeGen clangCrossTU clangDriver clangDynamicASTMatchers clangEdit clangExtractAPI clangFormat clangFrontend clangFrontendTool clangHandleCXX clangHandleLLVM clangIndex clangLex clangParse clangRewrite clangRewriteFrontend clangSema clangSerialization clangSupport clangTooling clangToolingASTDiff clangToolingCore clangToolingInclusions
-CLANG_LIBS = $(START_GROUP) $(addprefix -l,$(CLANG_LIB_NAMES)) $(END_GROUP) -lstdc++
-
-# Libraries that should be linked in for the statically linked LLD.
-LLD_LIB_NAMES = lldCOFF lldCommon lldELF lldMachO lldMinGW lldWasm
-LLD_LIBS = $(START_GROUP) $(addprefix -l,$(LLD_LIB_NAMES)) $(END_GROUP)
-
-# Other libraries that are needed to link TinyGo.
-EXTRA_LIB_NAMES = LLVMInterpreter LLVMMCA LLVMX86TargetMCA
-
-# All libraries to be built and linked with the tinygo binary (lib/lib*.a).
-LIB_NAMES = clang $(CLANG_LIB_NAMES) $(LLD_LIB_NAMES) $(EXTRA_LIB_NAMES)
-
-# These build targets appear to be the only ones necessary to build all TinyGo
-# dependencies. Only building a subset significantly speeds up rebuilding LLVM.
-# The Makefile rules convert a name like lldELF to lib/liblldELF.a to match the
-# library path (for ninja).
-# This list also includes a few tools that are necessary as part of the full
-# TinyGo build.
-NINJA_BUILD_TARGETS = clang llvm-config llvm-ar llvm-nm $(addprefix lib/lib,$(addsuffix .a,$(LIB_NAMES)))
-
-# For static linking.
-ifneq ("$(wildcard $(LLVM_BUILDDIR)/bin/llvm-config*)","")
-    CGO_CPPFLAGS+=$(shell $(LLVM_CONFIG_PREFIX) $(LLVM_BUILDDIR)/bin/llvm-config --cppflags) -I$(abspath $(LLVM_BUILDDIR))/tools/clang/include -I$(abspath $(CLANG_SRC))/include -I$(abspath $(LLD_SRC))/include
-    CGO_CXXFLAGS=-std=c++14
-    CGO_LDFLAGS+=-L$(abspath $(LLVM_BUILDDIR)/lib) -lclang $(CLANG_LIBS) $(LLD_LIBS) $(shell $(LLVM_CONFIG_PREFIX) $(LLVM_BUILDDIR)/bin/llvm-config --ldflags --libs --system-libs $(LLVM_COMPONENTS)) -lstdc++ $(CGO_LDFLAGS_EXTRA)
+ifeq ($(TARGET),pca10040)
+flash-%: build/%.hex
+	nrfjprog -f nrf52 --sectorerase --program $< --reset
+else ifeq ($(TARGET),microbit)
+flash-%: build/%.hex
+	openocd -f interface/cmsis-dap.cfg -f target/nrf51.cfg -c 'program $< reset exit'
+else ifeq ($(TARGET),reelboard)
+flash-%: build/%.hex
+	openocd -f interface/cmsis-dap.cfg -f target/nrf51.cfg -c 'program $< reset exit'
+else ifeq ($(TARGET),arduino)
+flash-%: build/%.hex
+	avrdude -c arduino -p atmega328p -P /dev/ttyACM0 -U flash:w:$<
+else ifeq ($(TARGET),bluepill)
+flash-%: build/%.hex
+	openocd -f interface/stlink-v2.cfg -f target/stm32f1x.cfg -c 'program $< reset exit'
 endif
 
 clean:
 	@rm -rf build
 
-FMT_PATHS = ./*.go builder cgo/*.go compiler interp loader src transform
 fmt:
-	@gofmt -l -w $(FMT_PATHS)
-fmt-check:
-	@unformatted=$$(gofmt -l $(FMT_PATHS)); [ -z "$$unformatted" ] && exit 0; echo "Unformatted:"; for fn in $$unformatted; do echo "  $$fn"; done; exit 1
+	@go fmt . ./compiler ./interp ./loader ./ir ./src/device/arm ./src/examples/* ./src/machine ./src/runtime ./src/sync
+	@go fmt ./testdata/*.go
 
+test:
+	@go test -v .
 
-gen-device: gen-device-avr gen-device-esp gen-device-nrf gen-device-sam gen-device-sifive gen-device-kendryte gen-device-nxp gen-device-rp
-ifneq ($(STM32), 0)
-gen-device: gen-device-stm32
-endif
+gen-device: gen-device-avr gen-device-nrf gen-device-sam gen-device-stm32
 
 gen-device-avr:
-	@if [ ! -e lib/avr/README.md ]; then echo "Submodules have not been downloaded. Please download them using:\n  git submodule update --init"; exit 1; fi
-	$(GO) build -o ./build/gen-device-avr ./tools/gen-device-avr/
-	./build/gen-device-avr lib/avr/packs/atmega src/device/avr/
-	./build/gen-device-avr lib/avr/packs/tiny src/device/avr/
-	@GO111MODULE=off $(GO) fmt ./src/device/avr
+	./tools/gen-device-avr.py lib/avr/packs/atmega src/device/avr/
+	./tools/gen-device-avr.py lib/avr/packs/tiny src/device/avr/
+	go fmt ./src/device/avr
 
-build/gen-device-svd: ./tools/gen-device-svd/*.go
-	$(GO) build -o $@ ./tools/gen-device-svd/
+gen-device-nrf:
+	./tools/gen-device-svd.py lib/nrfx/mdk/ src/device/nrf/ --source=https://github.com/NordicSemiconductor/nrfx/tree/master/mdk
+	go fmt ./src/device/nrf
 
-gen-device-esp: build/gen-device-svd
-	./build/gen-device-svd -source=https://github.com/posborne/cmsis-svd/tree/master/data/Espressif-Community -interrupts=software lib/cmsis-svd/data/Espressif-Community/ src/device/esp/
-	./build/gen-device-svd -source=https://github.com/posborne/cmsis-svd/tree/master/data/Espressif -interrupts=software lib/cmsis-svd/data/Espressif/ src/device/esp/
-	GO111MODULE=off $(GO) fmt ./src/device/esp
-
-gen-device-nrf: build/gen-device-svd
-	./build/gen-device-svd -source=https://github.com/NordicSemiconductor/nrfx/tree/master/mdk lib/nrfx/mdk/ src/device/nrf/
-	GO111MODULE=off $(GO) fmt ./src/device/nrf
-
-gen-device-nxp: build/gen-device-svd
-	./build/gen-device-svd -source=https://github.com/posborne/cmsis-svd/tree/master/data/NXP lib/cmsis-svd/data/NXP/ src/device/nxp/
-	GO111MODULE=off $(GO) fmt ./src/device/nxp
-
-gen-device-sam: build/gen-device-svd
-	./build/gen-device-svd -source=https://github.com/posborne/cmsis-svd/tree/master/data/Atmel lib/cmsis-svd/data/Atmel/ src/device/sam/
-	GO111MODULE=off $(GO) fmt ./src/device/sam
-
-gen-device-sifive: build/gen-device-svd
-	./build/gen-device-svd -source=https://github.com/posborne/cmsis-svd/tree/master/data/SiFive-Community -interrupts=software lib/cmsis-svd/data/SiFive-Community/ src/device/sifive/
-	GO111MODULE=off $(GO) fmt ./src/device/sifive
-
-gen-device-kendryte: build/gen-device-svd
-	./build/gen-device-svd -source=https://github.com/posborne/cmsis-svd/tree/master/data/Kendryte-Community -interrupts=software lib/cmsis-svd/data/Kendryte-Community/ src/device/kendryte/
-	GO111MODULE=off $(GO) fmt ./src/device/kendryte
-
-gen-device-stm32: build/gen-device-svd
-	./build/gen-device-svd -source=https://github.com/tinygo-org/stm32-svd lib/stm32-svd/svd src/device/stm32/
-	GO111MODULE=off $(GO) fmt ./src/device/stm32
-
-gen-device-rp: build/gen-device-svd
-	./build/gen-device-svd -source=https://github.com/posborne/cmsis-svd/tree/master/data/RaspberryPi lib/cmsis-svd/data/RaspberryPi/ src/device/rp/
-	GO111MODULE=off $(GO) fmt ./src/device/rp
-
-# Get LLVM sources.
-$(LLVM_PROJECTDIR)/llvm:
-	git clone -b xtensa_release_15.x --depth=1 https://github.com/espressif/llvm-project $(LLVM_PROJECTDIR)
-llvm-source: $(LLVM_PROJECTDIR)/llvm
-
-# Configure LLVM.
-TINYGO_SOURCE_DIR=$(shell pwd)
-$(LLVM_BUILDDIR)/build.ninja:
-	mkdir -p $(LLVM_BUILDDIR) && cd $(LLVM_BUILDDIR) && cmake -G Ninja $(TINYGO_SOURCE_DIR)/$(LLVM_PROJECTDIR)/llvm "-DLLVM_TARGETS_TO_BUILD=X86;ARM;AArch64;RISCV;WebAssembly" "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=AVR;Xtensa" -DCMAKE_BUILD_TYPE=Release -DLIBCLANG_BUILD_STATIC=ON -DLLVM_ENABLE_TERMINFO=OFF -DLLVM_ENABLE_ZLIB=OFF -DLLVM_ENABLE_ZSTD=OFF -DLLVM_ENABLE_LIBEDIT=OFF -DLLVM_ENABLE_Z3_SOLVER=OFF -DLLVM_ENABLE_OCAMLDOC=OFF -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_PROJECTS="clang;lld" -DLLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD=OFF -DCLANG_ENABLE_STATIC_ANALYZER=OFF -DCLANG_ENABLE_ARCMT=OFF $(LLVM_OPTION)
-
-# Build LLVM.
-$(LLVM_BUILDDIR): $(LLVM_BUILDDIR)/build.ninja
-	cd $(LLVM_BUILDDIR) && ninja $(NINJA_BUILD_TARGETS)
-
-ifneq ($(USE_SYSTEM_BINARYEN),1)
-# Build Binaryen
-.PHONY: binaryen
-binaryen: build/wasm-opt$(EXE)
-build/wasm-opt$(EXE):
-	mkdir -p build
-	cd lib/binaryen && cmake -G Ninja . -DBUILD_STATIC_LIB=ON $(BINARYEN_OPTION) && ninja bin/wasm-opt$(EXE)
-	cp lib/binaryen/bin/wasm-opt$(EXE) build/wasm-opt$(EXE)
-endif
-
-# Build wasi-libc sysroot
-.PHONY: wasi-libc
-wasi-libc: lib/wasi-libc/sysroot/lib/wasm32-wasi/libc.a
-lib/wasi-libc/sysroot/lib/wasm32-wasi/libc.a:
-	@if [ ! -e lib/wasi-libc/Makefile ]; then echo "Submodules have not been downloaded. Please download them using:\n  git submodule update --init"; exit 1; fi
-	cd lib/wasi-libc && make -j4 EXTRA_CFLAGS="-O2 -g -DNDEBUG -mnontrapping-fptoint -msign-ext" MALLOC_IMPL=none CC=$(CLANG) AR=$(LLVM_AR) NM=$(LLVM_NM)
+gen-device-sam:
+	./tools/gen-device-svd.py lib/cmsis-svd/data/Atmel/ src/device/sam/ --source=https://github.com/posborne/cmsis-svd/tree/master/data/Atmel
+	go fmt ./src/device/sam
 
+gen-device-stm32:
+	./tools/gen-device-svd.py lib/cmsis-svd/data/STMicro/ src/device/stm32/ --source=https://github.com/posborne/cmsis-svd/tree/master/data/STMicro
+	go fmt ./src/device/stm32
 
 # Build the Go compiler.
-tinygo:
-	@if [ ! -f "$(LLVM_BUILDDIR)/bin/llvm-config" ]; then echo "Fetch and build LLVM first by running:"; echo "  make llvm-source"; echo "  make $(LLVM_BUILDDIR)"; exit 1; fi
-	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GOENVFLAGS) $(GO) build -buildmode exe -o build/tinygo$(EXE) -tags "byollvm osusergo" -ldflags="-X github.com/tinygo-org/tinygo/goenv.GitSha1=`git rev-parse --short HEAD`" .
-test: wasi-libc
-	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=20m -buildmode exe -tags "byollvm osusergo" ./builder ./cgo ./compileopts ./compiler ./interp ./transform .
+build/tgo: *.go compiler/*.go interp/*.go loader/*.go ir/*.go
+	@mkdir -p build
+	go build -o build/tgo -i .
 
-# Standard library packages that pass tests on darwin, linux, wasi, and windows, but take over a minute in wasi
-TEST_PACKAGES_SLOW = \
-	compress/bzip2 \
-	crypto/dsa \
-	index/suffixarray \
+# Binary that can run on the host.
+build/%: src/examples/% src/examples/%/*.go build/tgo src/runtime/*.go
+	./build/tgo build $(TGOFLAGS) -size=short -o $@ $(subst src/,,$<)
 
-# Standard library packages that pass tests quickly on darwin, linux, wasi, and windows
-TEST_PACKAGES_FAST = \
-	compress/lzw \
-	compress/zlib \
-	container/heap \
-	container/list \
-	container/ring \
-	crypto/des \
-	crypto/md5 \
-	crypto/rc4 \
-	crypto/sha1 \
-	crypto/sha256 \
-	crypto/sha512 \
-	debug/macho \
-	embed/internal/embedtest \
-	encoding \
-	encoding/ascii85 \
-	encoding/base32 \
-	encoding/base64 \
-	encoding/csv \
-	encoding/hex \
-	go/scanner \
-	hash \
-	hash/adler32 \
-	hash/crc64 \
-	hash/fnv \
-	html \
-	internal/itoa \
-	internal/profile \
-	math \
-	math/cmplx \
-	net/http/internal/ascii \
-	net/mail \
-	os \
-	path \
-	reflect \
-	sync \
-	testing \
-	testing/iotest \
-	text/scanner \
-	unicode \
-	unicode/utf16 \
-	unicode/utf8 \
-	$(nil)
+# ELF file that can run on a microcontroller.
+build/%.elf: src/examples/% src/examples/%/*.go build/tgo src/runtime/*.go
+	./build/tgo build $(TGOFLAGS) -size=short -o $@ $(subst src/,,$<)
 
-# Assume this will go away before Go2, so only check minor version.
-ifeq ($(filter $(shell $(GO) env GOVERSION | cut -f 2 -d.), 16 17 18), )
-TEST_PACKAGES_FAST += crypto/internal/nistec/fiat
-else
-TEST_PACKAGES_FAST += crypto/elliptic/internal/fiat
-endif
-
-# archive/zip requires os.ReadAt, which is not yet supported on windows
-# bytes requires mmap
-# compress/flate appears to hang on wasi
-# crypto/hmac fails on wasi, it exits with a "slice out of range" panic
-# debug/plan9obj requires os.ReadAt, which is not yet supported on windows
-# image requires recover(), which is not  yet supported on wasi
-# io/ioutil requires os.ReadDir, which is not yet supported on windows or wasi
-# mime/quotedprintable requires syscall.Faccessat
-# strconv requires recover() which is not yet supported on wasi
-# text/tabwriter requries recover(), which is not  yet supported on wasi
-# text/template/parse requires recover(), which is not yet supported on wasi
-# testing/fstest requires os.ReadDir, which is not yet supported on windows or wasi
-
-# Additional standard library packages that pass tests on individual platforms
-TEST_PACKAGES_LINUX := \
-	archive/zip \
-	bytes \
-	compress/flate \
-	crypto/hmac \
-	debug/dwarf \
-	debug/plan9obj \
-	image \
-	io/ioutil \
-	mime/quotedprintable \
-	net \
-	strconv \
-	testing/fstest \
-	text/tabwriter \
-	text/template/parse
-
-TEST_PACKAGES_DARWIN := $(TEST_PACKAGES_LINUX)
-
-TEST_PACKAGES_WINDOWS := \
-	compress/flate \
-	crypto/hmac \
-	strconv \
-	text/template/parse \
-	$(nil)
-
-# Report platforms on which each standard library package is known to pass tests
-jointmp := $(shell echo /tmp/join.$$$$)
-report-stdlib-tests-pass:
-	@for t in $(TEST_PACKAGES_DARWIN); do echo "$$t darwin"; done | sort > $(jointmp).darwin
-	@for t in $(TEST_PACKAGES_LINUX); do echo "$$t linux"; done | sort > $(jointmp).linux
-	@for t in $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW); do echo "$$t darwin linux wasi windows"; done | sort > $(jointmp).portable
-	@join -a1 -a2 $(jointmp).darwin $(jointmp).linux | \
-	join -a1 -a2 - $(jointmp).portable
-	@rm $(jointmp).*
-
-# Standard library packages that pass tests quickly on the current platform
-ifeq ($(shell uname),Darwin)
-TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_DARWIN)
-TEST_IOFS := true
-endif
-ifeq ($(shell uname),Linux)
-TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_LINUX)
-TEST_IOFS := true
-endif
-ifeq ($(OS),Windows_NT)
-TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_WINDOWS)
-TEST_IOFS := false
-endif
-
-# Test known-working standard library packages.
-# TODO: parallelize, and only show failing tests (no implied -v flag).
-.PHONY: tinygo-test
-tinygo-test:
-	$(TINYGO) test $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
-	@# io/fs requires os.ReadDir, not yet supported on windows or wasi. It also
-	@# requires a large stack-size. Hence, io/fs is only run conditionally.
-	@# For more details, see the comments on issue #3143.
-ifeq ($(TEST_IOFS),true)
-	$(TINYGO) test -stack-size=6MB io/fs
-endif
-tinygo-test-fast:
-	$(TINYGO) test $(TEST_PACKAGES_HOST)
-tinygo-bench:
-	$(TINYGO) test -bench . $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
-tinygo-bench-fast:
-	$(TINYGO) test -bench . $(TEST_PACKAGES_HOST)
-
-# Same thing, except for wasi rather than the current platform.
-tinygo-test-wasi:
-	$(TINYGO) test -target wasi $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
-tinygo-test-wasi-fast:
-	$(TINYGO) test -target wasi $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
-tinygo-bench-wasi:
-	$(TINYGO) test -target wasi -bench . $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW)
-tinygo-bench-wasi-fast:
-	$(TINYGO) test -target wasi -bench . $(TEST_PACKAGES_FAST)
-
-# Test external packages in a large corpus.
-test-corpus:
-	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags byollvm -run TestCorpus . -corpus=testdata/corpus.yaml
-test-corpus-fast:
-	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags byollvm -run TestCorpus -short . -corpus=testdata/corpus.yaml
-test-corpus-wasi: wasi-libc
-	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags byollvm -run TestCorpus . -corpus=testdata/corpus.yaml -target=wasi
-
-tinygo-baremetal:
-	# Regression tests that run on a baremetal target and don't fit in either main_test.go or smoketest.
-	# regression test for #2666: e.g. encoding/hex must pass on baremetal
-	$(TINYGO) test -target cortex-m-qemu encoding/hex
-
-.PHONY: smoketest
-smoketest:
-	$(TINYGO) version
-	$(TINYGO) targets > /dev/null
-	# regression test for #2892
-	cd tests/testing/recurse && ($(TINYGO) test ./... > recurse.log && cat recurse.log && test $$(wc -l < recurse.log) = 2 && rm recurse.log)
-	# compile-only platform-independent examples
-	cd tests/text/template/smoke && $(TINYGO) test -c && rm -f smoke.test
-	# regression test for #2563
-	cd tests/os/smoke && $(TINYGO) test -c -target=pybadge && rm smoke.test
-	# test all examples (except pwm)
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/adc
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/blinkm
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/blinky2
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/button
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/button2
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/echo
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/echo2
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=circuitplay-express examples/i2s
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/mcp3008
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/memstats
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=microbit            examples/microbit-blink
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/pininterrupt
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nano-rp2040         examples/rtcinterrupt
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/serial
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/systick
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/test
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=wioterminal         examples/hid-mouse
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=wioterminal         examples/hid-keyboard
-	@$(MD5SUM) test.hex
-	# test simulated boards on play.tinygo.org
-ifneq ($(WASM), 0)
-	$(TINYGO) build -size short -o test.wasm -tags=arduino              examples/blinky1
-	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=hifive1b             examples/blinky1
-	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=reelboard            examples/blinky1
-	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=microbit             examples/microbit-blink
-	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=circuitplay_express  examples/blinky1
-	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=circuitplay_bluefruit examples/blinky1
-	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=mch2022              examples/serial
-	@$(MD5SUM) test.wasm
-endif
-	# test all targets/boards
-	$(TINYGO) build -size short -o test.hex -target=pca10040-s132v6     examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=microbit            examples/echo
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=microbit-s110v8     examples/echo
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=microbit-v2         examples/microbit-blink
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=microbit-v2-s113v7  examples/microbit-blink
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nrf52840-mdk        examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10031            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=reelboard           examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=reelboard           examples/blinky2
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10056            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10056            examples/blinky2
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10059            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10059            examples/blinky2
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=itsybitsy-m0        examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=feather-m0          examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=trinket-m0          examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=circuitplay-express examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=circuitplay-bluefruit examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=circuitplay-express examples/i2s
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=clue-alpha          examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.gba -target=gameboy-advance     examples/gba-display
-	@$(MD5SUM) test.gba
-	$(TINYGO) build -size short -o test.hex -target=grandcentral-m4     examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=itsybitsy-m4        examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=feather-m4          examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=matrixportal-m4     examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pybadge             examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=metro-m4-airlift    examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pyportal            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=particle-argon      examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=particle-boron      examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=particle-xenon      examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pinetime-devkit0    examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=x9pro               examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10056-s140v7     examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=reelboard-s140v7    examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=wioterminal         examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pygamer             examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=xiao                examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=circuitplay-express examples/dac
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pyportal            examples/dac
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=feather-nrf52840  	examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=feather-nrf52840-sense examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=itsybitsy-nrf52840  examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=qtpy                examples/serial
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=teensy41            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=teensy40            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=teensy36            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=p1am-100            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=atsame54-xpro       examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=atsame54-xpro       examples/can
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=feather-m4-can      examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=feather-m4-can      examples/caninterrupt
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-nano33      examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-mkrwifi1010 examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pico                examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nano-33-ble         examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nano-rp2040         examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=feather-rp2040 		examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=qtpy-rp2040         examples/echo
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=kb2040              examples/echo
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=macropad-rp2040 	examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=badger2040          examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=tufty2040           examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=thingplus-rp2040    examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=xiao-rp2040         examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=waveshare-rp2040-zero examples/echo
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=challenger-rp2040    examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=trinkey-qt2040      examples/temp
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=gopher-badge      examples/blinky1
-	@$(MD5SUM) test.hex
-	# test pwm
-	$(TINYGO) build -size short -o test.hex -target=itsybitsy-m0        examples/pwm
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=itsybitsy-m4        examples/pwm
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=feather-m4          examples/pwm
-	@$(MD5SUM) test.hex
-	# test usb
-	$(TINYGO) build -size short -o test.hex -target=feather-nrf52840    examples/hid-keyboard
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=circuitplay-express examples/hid-keyboard
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=feather-nrf52840    examples/usb-midi
-	@$(MD5SUM) test.hex
-ifneq ($(STM32), 0)
-	$(TINYGO) build -size short -o test.hex -target=bluepill            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=feather-stm32f405   examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=lgt92               examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nucleo-f103rb       examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nucleo-f722ze       examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nucleo-l031k6       examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nucleo-l432kc       examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nucleo-l552ze       examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=nucleo-wl55jc       examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=stm32f4disco        examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=stm32f4disco        examples/blinky2
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=stm32f4disco-1      examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=stm32f4disco-1      examples/pwm
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=stm32f469disco      examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=lorae5              examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=swan                examples/blinky1
-	@$(MD5SUM) test.hex
-endif
-	$(TINYGO) build -size short -o test.hex -target=atmega1284p         examples/serial
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino             examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-leonardo    examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino             examples/pwm
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino -scheduler=tasks  examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-mega1280    examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-mega1280    examples/pwm
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-nano        examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=digispark           examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=digispark -gc=leaking examples/blinky1
-	@$(MD5SUM) test.hex
-ifneq ($(XTENSA), 0)
-	$(TINYGO) build -size short -o test.bin -target=esp32-mini32      	examples/blinky1
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=nodemcu             examples/blinky1
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target m5stack-core2       examples/serial
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target m5stack             examples/serial
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target mch2022             examples/serial
-	@$(MD5SUM) test.bin
-endif
-	$(TINYGO) build -size short -o test.bin -target=esp32c3             examples/serial
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32c3-12f         examples/serial
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=m5stamp-c3          examples/serial
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=xiao-esp32c3        examples/serial
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.hex -target=hifive1b            examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=maixbit             examples/blinky1
-	@$(MD5SUM) test.hex
-ifneq ($(WASM), 0)
-	$(TINYGO) build -size short -o wasm.wasm -target=wasm               examples/wasm/export
-	$(TINYGO) build -size short -o wasm.wasm -target=wasm               examples/wasm/main
-endif
-	# test various compiler flags
-	$(TINYGO) build -size short -o test.hex -target=pca10040 -gc=none -scheduler=none examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040 -opt=1     examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pca10040 -serial=none examples/echo
-	@$(MD5SUM) test.hex
-	$(TINYGO) build             -o test.nro -target=nintendoswitch      examples/serial
-	@$(MD5SUM) test.nro
-	$(TINYGO) build -size short -o test.hex -target=pca10040 -opt=0     ./testdata/stdlib.go
-	@$(MD5SUM) test.hex
-	GOOS=linux GOARCH=arm $(TINYGO) build -size short -o test.elf       ./testdata/cgo
-	GOOS=windows GOARCH=amd64 $(TINYGO) build -size short -o test.exe   ./testdata/cgo
-	GOOS=windows GOARCH=arm64 $(TINYGO) build -size short -o test.exe   ./testdata/cgo
-	GOOS=darwin GOARCH=amd64 $(TINYGO) build  -size short -o test       ./testdata/cgo
-	GOOS=darwin GOARCH=arm64 $(TINYGO) build  -size short -o test       ./testdata/cgo
-ifneq ($(OS),Windows_NT)
-	# TODO: this does not yet work on Windows. Somehow, unused functions are
-	# not garbage collected.
-	$(TINYGO) build -o test.elf -gc=leaking -scheduler=none examples/serial
-endif
-
-
-wasmtest:
-	$(GO) test ./tests/wasm
-
-build/release: tinygo gen-device wasi-libc $(if $(filter 1,$(USE_SYSTEM_BINARYEN)),,binaryen)
-	@mkdir -p build/release/tinygo/bin
-	@mkdir -p build/release/tinygo/lib/clang/include
-	@mkdir -p build/release/tinygo/lib/CMSIS/CMSIS
-	@mkdir -p build/release/tinygo/lib/macos-minimal-sdk
-	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
-	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-headers/defaults
-	@mkdir -p build/release/tinygo/lib/musl/arch
-	@mkdir -p build/release/tinygo/lib/musl/crt
-	@mkdir -p build/release/tinygo/lib/musl/src
-	@mkdir -p build/release/tinygo/lib/nrfx
-	@mkdir -p build/release/tinygo/lib/picolibc/newlib/libc
-	@mkdir -p build/release/tinygo/lib/picolibc/newlib/libm
-	@mkdir -p build/release/tinygo/lib/wasi-libc
-	@mkdir -p build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0
-	@mkdir -p build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus
-	@mkdir -p build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4
-	@echo copying source files
-	@cp -p  build/tinygo$(EXE)           build/release/tinygo/bin
-ifneq ($(USE_SYSTEM_BINARYEN),1)
-	@cp -p  build/wasm-opt$(EXE)         build/release/tinygo/bin
-endif
-	@cp -p $(abspath $(CLANG_SRC))/lib/Headers/*.h build/release/tinygo/lib/clang/include
-	@cp -rp lib/CMSIS/CMSIS/Include      build/release/tinygo/lib/CMSIS/CMSIS
-	@cp -rp lib/CMSIS/README.md          build/release/tinygo/lib/CMSIS
-	@cp -rp lib/macos-minimal-sdk/*      build/release/tinygo/lib/macos-minimal-sdk
-	@cp -rp lib/musl/arch/aarch64        build/release/tinygo/lib/musl/arch
-	@cp -rp lib/musl/arch/arm            build/release/tinygo/lib/musl/arch
-	@cp -rp lib/musl/arch/generic        build/release/tinygo/lib/musl/arch
-	@cp -rp lib/musl/arch/i386           build/release/tinygo/lib/musl/arch
-	@cp -rp lib/musl/arch/x86_64         build/release/tinygo/lib/musl/arch
-	@cp -rp lib/musl/crt/crt1.c          build/release/tinygo/lib/musl/crt
-	@cp -rp lib/musl/COPYRIGHT           build/release/tinygo/lib/musl
-	@cp -rp lib/musl/include             build/release/tinygo/lib/musl
-	@cp -rp lib/musl/src/env             build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/errno           build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/exit            build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/include         build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/internal        build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/legacy          build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/malloc          build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/mman            build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/math            build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/signal          build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/stdio           build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/string          build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/thread          build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/time            build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/unistd          build/release/tinygo/lib/musl/src
-	@cp -rp lib/mingw-w64/mingw-w64-crt/def-include                 build/release/tinygo/lib/mingw-w64/mingw-w64-crt
-	@cp -rp lib/mingw-w64/mingw-w64-crt/lib-common/api-ms-win-crt-* build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
-	@cp -rp lib/mingw-w64/mingw-w64-crt/lib-common/kernel32.def.in  build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
-	@cp -rp lib/mingw-w64/mingw-w64-headers/crt/                    build/release/tinygo/lib/mingw-w64/mingw-w64-headers
-	@cp -rp lib/mingw-w64/mingw-w64-headers/defaults/include        build/release/tinygo/lib/mingw-w64/mingw-w64-headers/defaults
-	@cp -rp lib/nrfx/*                   build/release/tinygo/lib/nrfx
-	@cp -rp lib/picolibc/newlib/libc/ctype       build/release/tinygo/lib/picolibc/newlib/libc
-	@cp -rp lib/picolibc/newlib/libc/include     build/release/tinygo/lib/picolibc/newlib/libc
-	@cp -rp lib/picolibc/newlib/libc/locale      build/release/tinygo/lib/picolibc/newlib/libc
-	@cp -rp lib/picolibc/newlib/libc/string      build/release/tinygo/lib/picolibc/newlib/libc
-	@cp -rp lib/picolibc/newlib/libc/tinystdio   build/release/tinygo/lib/picolibc/newlib/libc
-	@cp -rp lib/picolibc/newlib/libm/common      build/release/tinygo/lib/picolibc/newlib/libm
-	@cp -rp lib/picolibc/newlib/libm/math        build/release/tinygo/lib/picolibc/newlib/libm
-	@cp -rp lib/picolibc-stdio.c         build/release/tinygo/lib
-	@cp -rp lib/wasi-libc/sysroot        build/release/tinygo/lib/wasi-libc/sysroot
-	@cp -rp llvm-project/compiler-rt/lib/builtins build/release/tinygo/lib/compiler-rt-builtins
-	@cp -rp llvm-project/compiler-rt/LICENSE.TXT  build/release/tinygo/lib/compiler-rt-builtins
-	@cp -rp src                          build/release/tinygo/src
-	@cp -rp targets                      build/release/tinygo/targets
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0     -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0/compiler-rt     compiler-rt
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0plus -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus/compiler-rt compiler-rt
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m4     -o build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4/compiler-rt    compiler-rt
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0     -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0/picolibc     picolibc
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m0plus -o build/release/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus/picolibc picolibc
-	./build/release/tinygo/bin/tinygo build-library -target=cortex-m4     -o build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4/picolibc    picolibc
-
-release:
-	tar -czf build/release.tar.gz -C build/release tinygo
-
-DEB_ARCH ?= native
-deb:
-	@mkdir -p build/release-deb/usr/local/bin
-	@mkdir -p build/release-deb/usr/local/lib
-	cp -ar build/release/tinygo build/release-deb/usr/local/lib/tinygo
-	ln -sf ../lib/tinygo/bin/tinygo build/release-deb/usr/local/bin/tinygo
-	fpm -f -s dir -t deb -n tinygo -a $(DEB_ARCH) -v $(shell grep "const Version = " goenv/version.go | awk '{print $$NF}') -m '@tinygo-org' --description='TinyGo is a Go compiler for small places.' --license='BSD 3-Clause' --url=https://tinygo.org/ --deb-changelog CHANGELOG.md -p build/release.deb -C ./build/release-deb
-
-ifneq ($(RELEASEONLY), 1)
-release: build/release
-deb: build/release
-endif
+# Convert executable to Intel hex file (for flashing).
+build/%.hex: build/%.elf
+	$(OBJCOPY) -O ihex $^ $@

README.md

@@ -1,157 +1,144 @@
-# TinyGo - Go compiler for small places
+# TinyGo - Go compiler for microcontrollers
 
-[![Linux](https://github.com/tinygo-org/tinygo/actions/workflows/linux.yml/badge.svg?branch=dev)](https://github.com/tinygo-org/tinygo/actions/workflows/linux.yml) [![macOS](https://github.com/tinygo-org/tinygo/actions/workflows/build-macos.yml/badge.svg?branch=dev)](https://github.com/tinygo-org/tinygo/actions/workflows/build-macos.yml) [![Windows](https://github.com/tinygo-org/tinygo/actions/workflows/windows.yml/badge.svg?branch=dev)](https://github.com/tinygo-org/tinygo/actions/workflows/windows.yml) [![Docker](https://github.com/tinygo-org/tinygo/actions/workflows/docker.yml/badge.svg?branch=dev)](https://github.com/tinygo-org/tinygo/actions/workflows/docker.yml) [![CircleCI](https://circleci.com/gh/tinygo-org/tinygo/tree/dev.svg?style=svg)](https://circleci.com/gh/tinygo-org/tinygo/tree/dev)
+[![Build Status](https://travis-ci.com/aykevl/tinygo.svg?branch=master)](https://travis-ci.com/aykevl/tinygo)
 
-TinyGo is a Go compiler intended for use in small places such as microcontrollers, WebAssembly (Wasm), and command-line tools.
+> We never expected Go to be an embedded language and so it's got serious
+> problems [...].
 
-It reuses libraries used by the [Go language tools](https://golang.org/pkg/go/) alongside [LLVM](http://llvm.org) to provide an alternative way to compile programs written in the Go programming language.
+-- Rob Pike, [GopherCon 2014 Opening Keynote](https://www.youtube.com/watch?v=VoS7DsT1rdM&feature=youtu.be&t=2799)
 
-Here is an example program that blinks the built-in LED when run directly on any supported board with onboard LED:
+TinyGo is a project to bring Go to microcontrollers and small systems with a
+single processor core. It is similar to [emgo](https://github.com/ziutek/emgo)
+but a major difference is that I want to keep the Go memory model (which implies
+garbage collection of some sort). Another difference is that TinyGo uses LLVM
+internally instead of emitting C, which hopefully leads to smaller and more
+efficient code and certainly leads to more flexibility.
+
+My original reasoning was: if [Python](https://micropython.org/) can run on
+microcontrollers, then certainly [Go](https://golang.org/) should be able to and
+run on even lower level micros.
+
+Example program (blinky):
 
 ```go
-package main
-
 import (
-    "machine"
-    "time"
+	"machine"
+	"time"
 )
 
 func main() {
-    led := machine.LED
-    led.Configure(machine.PinConfig{Mode: machine.PinOutput})
-    for {
-        led.Low()
-        time.Sleep(time.Millisecond * 1000)
+	led := machine.GPIO{machine.LED}
+	led.Configure(machine.GPIOConfig{Mode: machine.GPIO_OUTPUT})
+	for {
+		led.Low()
+		time.Sleep(time.Millisecond * 1000)
 
-        led.High()
-        time.Sleep(time.Millisecond * 1000)
-    }
+		led.High()
+		time.Sleep(time.Millisecond * 1000)
+	}
 }
 ```
 
-The above program can be compiled and run without modification on an Arduino Uno, an Adafruit ItsyBitsy M0, or any of the supported boards that have a built-in LED, just by setting the correct TinyGo compiler target. For example, this compiles and flashes an Arduino Uno:
+Currently supported features:
 
-```shell
-tinygo flash -target arduino examples/blinky1
-```
+  * control flow
+  * many (but not all) basic types: most ints, floats, strings, structs
+  * function calling
+  * interfaces for basic types (with type switches and asserts)
+  * goroutines (very initial support)
+  * function pointers (non-blocking)
+  * interface methods
+  * standard library (but most packages won't work due to missing language
+    features)
+  * slices (partially)
+  * maps (very rough, unfinished)
+  * defer
+  * closures
+  * bound methods
+  * complex numbers (except for arithmetic)
+
+Not yet supported:
+
+  * complex arithmetic
+  * garbage collection
+  * recover
+  * channels
+  * introspection (if it ever gets implemented)
+  * ...
 
 ## Installation
 
-See the [getting started instructions](https://tinygo.org/getting-started/) for information on how to install TinyGo, as well as how to run the TinyGo compiler using our Docker container.
+See the [getting started instructions](https://tinygo.org/getting-started/).
 
-## Supported boards/targets
+### Running with Docker
 
-You can compile TinyGo programs for microcontrollers, WebAssembly and Linux.
+A docker container exists for easy access to the `tinygo` CLI:
 
-The following 94 microcontroller boards are currently supported:
+```sh
+$ docker run --rm -v $(pwd):/src tinygo/tinygo tinygo build -o /src/wasm.wasm -target wasm examples/wasm
+```
 
-* [Adafruit Circuit Playground Bluefruit](https://www.adafruit.com/product/4333)
-* [Adafruit Circuit Playground Express](https://www.adafruit.com/product/3333)
-* [Adafruit CLUE](https://www.adafruit.com/product/4500)
-* [Adafruit Feather M0](https://www.adafruit.com/product/2772)
-* [Adafruit Feather M0 Express](https://www.adafruit.com/product/3403)
-* [Adafruit Feather M4](https://www.adafruit.com/product/3857)
-* [Adafruit Feather M4 CAN](https://www.adafruit.com/product/4759)
-* [Adafruit Feather nRF52840 Express](https://www.adafruit.com/product/4062)
-* [Adafruit Feather nRF52840 Sense](https://www.adafruit.com/product/4516)
-* [Adafruit Feather RP2040](https://www.adafruit.com/product/4884)
-* [Adafruit Feather STM32F405 Express](https://www.adafruit.com/product/4382)
-* [Adafruit Grand Central M4](https://www.adafruit.com/product/4064)
-* [Adafruit ItsyBitsy M0](https://www.adafruit.com/product/3727)
-* [Adafruit ItsyBitsy M4](https://www.adafruit.com/product/3800)
-* [Adafruit ItsyBitsy nRF52840](https://www.adafruit.com/product/4481)
-* [Adafruit KB2040](https://www.adafruit.com/product/5302)
-* [Adafruit MacroPad RP2040](https://www.adafruit.com/product/5100)
-* [Adafruit Matrix Portal M4](https://www.adafruit.com/product/4745)
-* [Adafruit Metro M4 Express Airlift](https://www.adafruit.com/product/4000)
-* [Adafruit PyBadge](https://www.adafruit.com/product/4200)
-* [Adafruit PyGamer](https://www.adafruit.com/product/4242)
-* [Adafruit PyPortal](https://www.adafruit.com/product/4116)
-* [Adafruit QT Py](https://www.adafruit.com/product/4600)
-* [Adafruit QT Py RP2040](https://www.adafruit.com/product/4900)
-* [Adafruit Trinket M0](https://www.adafruit.com/product/3500)
-* [Adafruit Trinkey QT2040](https://adafruit.com/product/5056)
-* [Arduino Mega 1280](https://www.arduino.cc/en/Main/arduinoBoardMega/)
-* [Arduino Mega 2560](https://store.arduino.cc/arduino-mega-2560-rev3)
-* [Arduino MKR1000](https://store.arduino.cc/arduino-mkr1000-wifi)
-* [Arduino MKR WiFi 1010](https://store.arduino.cc/usa/mkr-wifi-1010)
-* [Arduino Nano](https://store.arduino.cc/arduino-nano)
-* [Arduino Nano 33 BLE](https://store.arduino.cc/nano-33-ble)
-* [Arduino Nano 33 BLE Sense](https://store.arduino.cc/nano-33-ble-sense)
-* [Arduino Nano 33 IoT](https://store.arduino.cc/nano-33-iot)
-* [Arduino Nano RP2040 Connect](https://store.arduino.cc/nano-rp2040-connect)
-* [Arduino Uno](https://store.arduino.cc/arduino-uno-rev3)
-* [Arduino Zero](https://store.arduino.cc/usa/arduino-zero)
-* [BBC micro:bit](https://microbit.org/)
-* [BBC micro:bit v2](https://microbit.org/new-microbit/)
-* [blues wireless Swan](https://blues.io/products/swan/)
-* [Digispark](http://digistump.com/products/1)
-* [Dragino LoRaWAN GPS Tracker LGT-92](http://www.dragino.com/products/lora-lorawan-end-node/item/142-lgt-92.html)
-* [ESP32 - Core board](https://www.espressif.com/en/products/socs/esp32)
-* [ESP32 - mini32](https://www.espressif.com/en/products/socs/esp32)
-* [ESP32-C3-12f](https://www.espressif.com/en/products/socs/esp32-c3)
-* [ESP8266 - d1mini](https://www.espressif.com/en/products/socs/esp8266)
-* [ESP8266 - NodeMCU](https://www.espressif.com/en/products/socs/esp8266)
-* [Game Boy Advance](https://en.wikipedia.org/wiki/Game_Boy_Advance)
-* [iLabs Challenger RP2040 LoRa](https://ilabs.se/product/challenger-rp2040-lora/)
-* [M5Stack](https://docs.m5stack.com/en/core/basic)
-* [M5Stack Core2](https://shop.m5stack.com/products/m5stack-core2-esp32-iot-development-kit)
-* [M5Stamp C3](https://docs.m5stack.com/en/core/stamp_c3)
-* [Makerdiary nRF52840-MDK](https://wiki.makerdiary.com/nrf52840-mdk/)
-* [Makerdiary nRF52840-MDK USB Dongle](https://wiki.makerdiary.com/nrf52840-mdk-usb-dongle/)
-* [MCH2022 badge](https://badge.team/docs/badges/mch2022/)
-* [Microchip SAM E54 Xplained Pro](https://www.microchip.com/developmenttools/productdetails/atsame54-xpro)
-* [nice!nano](https://docs.nicekeyboards.com/#/nice!nano/)
-* [Nintendo Switch](https://www.nintendo.com/switch/)
-* [Nordic Semiconductor PCA10031](https://www.nordicsemi.com/eng/Products/nRF51-Dongle)
-* [Nordic Semiconductor PCA10040](https://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF52-DK)
-* [Nordic Semiconductor PCA10056](https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF52840-DK)
-* [Nordic Semiconductor pca10059](https://www.nordicsemi.com/Software-and-tools/Development-Kits/nRF52840-Dongle)
-* [Particle Argon](https://docs.particle.io/datasheets/wi-fi/argon-datasheet/)
-* [Particle Boron](https://docs.particle.io/datasheets/cellular/boron-datasheet/)
-* [Particle Xenon](https://docs.particle.io/datasheets/discontinued/xenon-datasheet/)
-* [Phytec reel board](https://www.phytec.eu/product-eu/internet-of-things/reelboard/)
-* [Pimoroni Badger2040](https://shop.pimoroni.com/products/badger-2040)
-* [Pimoroni Tufty2040](https://shop.pimoroni.com/products/tufty-2040)
-* [PineTime DevKit](https://www.pine64.org/pinetime/)
-* [PJRC Teensy 3.6](https://www.pjrc.com/store/teensy36.html)
-* [PJRC Teensy 4.0](https://www.pjrc.com/store/teensy40.html)
-* [PJRC Teensy 4.1](https://www.pjrc.com/store/teensy41.html)
-* [ProductivityOpen P1AM-100](https://facts-engineering.github.io/modules/P1AM-100/P1AM-100.html)
-* [Raspberry Pi Pico](https://www.raspberrypi.org/products/raspberry-pi-pico/)
-* [Raytac MDBT50Q-RX Dongle (with TinyUF2 bootloader)](https://www.adafruit.com/product/5199)
-* [Seeed Seeeduino XIAO](https://www.seeedstudio.com/Seeeduino-XIAO-Arduino-Microcontroller-SAMD21-Cortex-M0+-p-4426.html)
-* [Seeed XIAO BLE](https://www.seeedstudio.com/Seeed-XIAO-BLE-nRF52840-p-5201.html)
-* [Seeed XIAO ESP32C3](https://www.seeedstudio.com/Seeed-XIAO-ESP32C3-p-5431.html)
-* [Seeed XIAO RP2040](https://www.seeedstudio.com/XIAO-RP2040-v1-0-p-5026.html)
-* [Seeed LoRa-E5 Development Kit](https://www.seeedstudio.com/LoRa-E5-Dev-Kit-p-4868.html)
-* [Seeed Sipeed MAix BiT](https://www.seeedstudio.com/Sipeed-MAix-BiT-for-RISC-V-AI-IoT-p-2872.html)
-* [Seeed Wio Terminal](https://www.seeedstudio.com/Wio-Terminal-p-4509.html)
-* [SiFIve HiFive1 Rev B](https://www.sifive.com/boards/hifive1-rev-b)
-* [Sparkfun Thing Plus RP2040](https://www.sparkfun.com/products/17745)
-* [ST Micro "Nucleo" F103RB](https://www.st.com/en/evaluation-tools/nucleo-f103rb.html)
-* [ST Micro "Nucleo" F722ZE](https://www.st.com/en/evaluation-tools/nucleo-f722ze.html)
-* [ST Micro "Nucleo" L031K6](https://www.st.com/ja/evaluation-tools/nucleo-l031k6.html)
-* [ST Micro "Nucleo" L432KC](https://www.st.com/ja/evaluation-tools/nucleo-l432kc.html)
-* [ST Micro "Nucleo" L552ZE](https://www.st.com/en/evaluation-tools/nucleo-l552ze-q.html)
-* [ST Micro "Nucleo" WL55JC](https://www.st.com/en/evaluation-tools/nucleo-wl55jc.html)
-* [ST Micro STM32F103XX "Bluepill"](https://stm32-base.org/boards/STM32F103C8T6-Blue-Pill)
-* [ST Micro STM32F407 "Discovery"](https://www.st.com/en/evaluation-tools/stm32f4discovery.html)
-* [ST Micro STM32F469 "Discovery"](https://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/mcu-mpu-eval-tools/stm32-mcu-mpu-eval-tools/stm32-discovery-kits/32f469idiscovery.html)
-* [The Things Industries Generic Node Sensor Edition](https://www.genericnode.com/docs/sensor-edition/)
-* [Waveshare RP2040-Zero](https://www.waveshare.com/wiki/RP2040-Zero)
-* [X9 Pro smartwatch](https://github.com/curtpw/nRF5x-device-reverse-engineering/tree/master/X9-nrf52832-activity-tracker/)
+Note that you cannot run `tinygo flash` from inside the docker container,
+so it is less useful for microcontroller development.
 
+## Supported targets
 
-For more information, see [this list of boards](https://tinygo.org/microcontrollers/). Pull requests for additional support are welcome!
+The following architectures/systems are currently supported:
 
-## Currently supported features:
+  * ARM (Cortex-M)
+  * AVR (Arduino Uno)
+  * Linux
+  * WebAssembly
 
-For a description of currently supported Go language features, please see [https://tinygo.org/lang-support/](https://tinygo.org/lang-support/).
+For more information, see [this list of targets and
+boards](https://tinygo.org/targets/). Pull requests for
+broader support are welcome!
+
+## Analysis and optimizations
+
+The goal is to reduce code size (and increase performance) by performing all
+kinds of whole-program analysis passes. The official Go compiler doesn't do a
+whole lot of analysis (except for escape analysis) because it needs to be fast,
+but embedded programs are necessarily smaller so it becomes practical. And I
+think especially program size can be reduced by a large margin when actually
+trying to optimize for it.
+
+Implemented compiler passes:
+
+  * Analyse which functions are blocking. Blocking functions are functions that
+    call sleep, chan send, etc. Its parents are also blocking.
+  * Analyse whether the scheduler is needed. It is only needed when there are
+    `go` statements for blocking functions.
+  * Analyse whether a given type switch or type assert is possible with
+    [type-based alias analysis](https://en.wikipedia.org/wiki/Alias_analysis#Type-based_alias_analysis).
+    I would like to use flow-based alias analysis in the future, if feasible.
+  * Do basic dead code elimination of functions. This pass makes later passes
+    better and probably improves compile time as well.
+
+## Scope
+
+Goals:
+
+  * Have very small binary sizes. Don't pay for what you don't use.
+  * Support for most common microcontroller boards.
+  * Be usable on the web using WebAssembly.
+  * Good CGo support, with no more overhead than a regular function call.
+  * Support most standard library packages and compile most Go code without
+    modification.
+
+Non-goals:
+
+  * Using more than one core.
+  * Be efficient while using zillions of goroutines. However, good goroutine
+    support is certainly a goal.
+  * Be as fast as `gc`. However, LLVM will probably be better at optimizing
+    certain things so TinyGo might actually turn out to be faster for number
+    crunching.
+  * Be able to compile every Go program out there.
 
 ## Documentation
 
-Documentation is located on our web site at [https://tinygo.org/](https://tinygo.org/).
+Documentation is currently maintained on a dedicated web site located at [https://tinygo.org/](https://tinygo.org/).
 
 You can find the web site code at [https://github.com/tinygo-org/tinygo-site](https://github.com/tinygo-org/tinygo-site).
 
@@ -166,40 +153,26 @@ should arrive fairly quickly (under 1 min): https://invite.slack.golangbridge.or
 
 ## Contributing
 
-Your contributions are welcome!
+Patches are welcome!
 
-Please take a look at our [Contributing](https://tinygo.org/docs/guides/contributing/) page on our web site for details.
+If you want to contribute, here are some suggestions:
 
-## Project Scope
-
-Goals:
-
-* Have very small binary sizes. Don't pay for what you don't use.
-* Support for most common microcontroller boards.
-* Be usable on the web using WebAssembly.
-* Good CGo support, with no more overhead than a regular function call.
-* Support most standard library packages and compile most Go code without modification.
-
-Non-goals:
-
-* Be efficient while using zillions of goroutines. However, good goroutine support is certainly a goal.
-* Be as fast as `gc`. However, LLVM will probably be better at optimizing certain things so TinyGo might actually turn out to be faster for number crunching.
-* Be able to compile every Go program out there.
-
-## Why this project exists
-
-> We never expected Go to be an embedded language and so its got serious problems...
-
--- Rob Pike, [GopherCon 2014 Opening Keynote](https://www.youtube.com/watch?v=VoS7DsT1rdM&feature=youtu.be&t=2799)
-
-TinyGo is a project to bring Go to microcontrollers and small systems with a single processor core. It is similar to [emgo](https://github.com/ziutek/emgo) but a major difference is that we want to keep the Go memory model (which implies garbage collection of some sort). Another difference is that TinyGo uses LLVM internally instead of emitting C, which hopefully leads to smaller and more efficient code and certainly leads to more flexibility.
-
-The original reasoning was: if [Python](https://micropython.org/) can run on microcontrollers, then certainly [Go](https://golang.org/) should be able to run on even lower level micros.
+  * A long tail of small (and large) language features haven't been implemented
+    yet. In almost all cases, the compiler will show a `todo:` error from
+    `compiler/compiler.go` when you try to use it. You can try implementing it,
+    or open a bug report with a small code sample that fails to compile.
+  * Lots of targets/boards are still unsupported. Adding an architecture often
+    requires a few compiler changes, but if the architecture is supported you
+    can try implementing support for a new chip or board in `src/runtime`. For
+    details, see [this wiki entry on adding
+    archs/chips/boards](https://github.com/aykevl/tinygo/wiki/Adding-a-new-board).
+  * Microcontrollers have lots of peripherals and many don't have an
+    implementation yet in the `machine` package. Adding support for new
+    peripherals is very useful.
+  * Just raising bugs for things you'd like to see implemented is also a form of
+    contributing! It helps prioritization.
 
 ## License
 
-This project is licensed under the BSD 3-clause license, just like the [Go project](https://golang.org/LICENSE) itself.
-
-Some code has been copied from the LLVM project and is therefore licensed under [a variant of the Apache 2.0 license](http://releases.llvm.org/11.0.0/LICENSE.TXT). This has been clearly indicated in the header of these files.
-
-Some code has been copied and/or ported from Paul Stoffregen's Teensy libraries and is therefore licensed under PJRC's license. This has been clearly indicated in the header of these files.
+This project is licensed under the BSD 3-clause license, just like the
+[Go project](https://golang.org/LICENSE) itself.

binutils.go

@@ -0,0 +1,160 @@
+package main
+
+import (
+	"debug/elf"
+	"sort"
+	"strings"
+)
+
+// Statistics about code size in a program.
+type ProgramSize struct {
+	Packages map[string]*PackageSize
+	Sum      *PackageSize
+	Code     uint64
+	Data     uint64
+	BSS      uint64
+}
+
+// Return the list of package names (ProgramSize.Packages) sorted
+// alphabetically.
+func (ps *ProgramSize) SortedPackageNames() []string {
+	names := make([]string, 0, len(ps.Packages))
+	for name := range ps.Packages {
+		names = append(names, name)
+	}
+	sort.Strings(names)
+	return names
+}
+
+// The size of a package, calculated from the linked object file.
+type PackageSize struct {
+	Code   uint64
+	ROData uint64
+	Data   uint64
+	BSS    uint64
+}
+
+// Flash usage in regular microcontrollers.
+func (ps *PackageSize) Flash() uint64 {
+	return ps.Code + ps.ROData + ps.Data
+}
+
+// Static RAM usage in regular microcontrollers.
+func (ps *PackageSize) RAM() uint64 {
+	return ps.Data + ps.BSS
+}
+
+type symbolList []elf.Symbol
+
+func (l symbolList) Len() int {
+	return len(l)
+}
+
+func (l symbolList) Less(i, j int) bool {
+	bind_i := elf.ST_BIND(l[i].Info)
+	bind_j := elf.ST_BIND(l[j].Info)
+	if l[i].Value == l[j].Value && bind_i != elf.STB_WEAK && bind_j == elf.STB_WEAK {
+		// sort weak symbols after non-weak symbols
+		return true
+	}
+	return l[i].Value < l[j].Value
+}
+
+func (l symbolList) Swap(i, j int) {
+	l[i], l[j] = l[j], l[i]
+}
+
+// Calculate program/data size breakdown of each package for a given ELF file.
+func Sizes(path string) (*ProgramSize, error) {
+	file, err := elf.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	var sumCode uint64
+	var sumData uint64
+	var sumBSS uint64
+	for _, section := range file.Sections {
+		if section.Flags&elf.SHF_ALLOC == 0 {
+			continue
+		}
+		if section.Type != elf.SHT_PROGBITS && section.Type != elf.SHT_NOBITS {
+			continue
+		}
+		if section.Type == elf.SHT_NOBITS {
+			sumBSS += section.Size
+		} else if section.Flags&elf.SHF_EXECINSTR != 0 {
+			sumCode += section.Size
+		} else if section.Flags&elf.SHF_WRITE != 0 {
+			sumData += section.Size
+		}
+	}
+
+	allSymbols, err := file.Symbols()
+	if err != nil {
+		return nil, err
+	}
+	symbols := make([]elf.Symbol, 0, len(allSymbols))
+	for _, symbol := range allSymbols {
+		symType := elf.ST_TYPE(symbol.Info)
+		if symbol.Size == 0 {
+			continue
+		}
+		if symType != elf.STT_FUNC && symType != elf.STT_OBJECT && symType != elf.STT_NOTYPE {
+			continue
+		}
+		if symbol.Section >= elf.SectionIndex(len(file.Sections)) {
+			continue
+		}
+		section := file.Sections[symbol.Section]
+		if section.Flags&elf.SHF_ALLOC == 0 {
+			continue
+		}
+		symbols = append(symbols, symbol)
+	}
+	sort.Sort(symbolList(symbols))
+
+	sizes := map[string]*PackageSize{}
+	var lastSymbolValue uint64
+	for _, symbol := range symbols {
+		symType := elf.ST_TYPE(symbol.Info)
+		//bind := elf.ST_BIND(symbol.Info)
+		section := file.Sections[symbol.Section]
+		pkgName := "(bootstrap)"
+		symName := strings.TrimLeft(symbol.Name, "(*")
+		dot := strings.IndexByte(symName, '.')
+		if dot > 0 {
+			pkgName = symName[:dot]
+		}
+		pkgSize := sizes[pkgName]
+		if pkgSize == nil {
+			pkgSize = &PackageSize{}
+			sizes[pkgName] = pkgSize
+		}
+		if lastSymbolValue != symbol.Value || lastSymbolValue == 0 {
+			if symType == elf.STT_FUNC {
+				pkgSize.Code += symbol.Size
+			} else if section.Flags&elf.SHF_WRITE != 0 {
+				if section.Type == elf.SHT_NOBITS {
+					pkgSize.BSS += symbol.Size
+				} else {
+					pkgSize.Data += symbol.Size
+				}
+			} else {
+				pkgSize.ROData += symbol.Size
+			}
+		}
+		lastSymbolValue = symbol.Value
+	}
+
+	sum := &PackageSize{}
+	for _, pkg := range sizes {
+		sum.Code += pkg.Code
+		sum.ROData += pkg.ROData
+		sum.Data += pkg.Data
+		sum.BSS += pkg.BSS
+	}
+
+	return &ProgramSize{Packages: sizes, Code: sumCode, Data: sumData, BSS: sumBSS, Sum: sum}, nil
+}

buildcache.go

@@ -0,0 +1,108 @@
+package main
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+	"time"
+)
+
+// Get the cache directory, usually ~/.cache/tinygo
+func cacheDir() string {
+	home := getHomeDir()
+	dir := filepath.Join(home, ".cache", "tinygo")
+	return dir
+}
+
+// Return the newest timestamp of all the file paths passed in. Used to check
+// for stale caches.
+func cacheTimestamp(paths []string) (time.Time, error) {
+	var timestamp time.Time
+	for _, path := range paths {
+		st, err := os.Stat(path)
+		if err != nil {
+			return time.Time{}, err
+		}
+		if timestamp.IsZero() {
+			timestamp = st.ModTime()
+		} else if timestamp.Before(st.ModTime()) {
+			timestamp = st.ModTime()
+		}
+	}
+	return timestamp, nil
+}
+
+// Try to load a given file from the cache. Return "", nil if no cached file can
+// be found (or the file is stale), return the absolute path if there is a cache
+// and return an error on I/O errors.
+//
+// TODO: the configKey is currently ignored. It is supposed to be used as extra
+// data for the cache key, like the compiler version and arguments.
+func cacheLoad(name, configKey string, sourceFiles []string) (string, error) {
+	dir := cacheDir()
+	cachepath := filepath.Join(dir, name)
+	cacheStat, err := os.Stat(cachepath)
+	if os.IsNotExist(err) {
+		return "", nil // does not exist
+	} else if err != nil {
+		return "", err // cannot stat cache file
+	}
+
+	sourceTimestamp, err := cacheTimestamp(sourceFiles)
+	if err != nil {
+		return "", err // cannot stat source files
+	}
+
+	if cacheStat.ModTime().After(sourceTimestamp) {
+		return cachepath, nil
+	} else {
+		os.Remove(cachepath)
+		// stale cache
+		return "", nil
+	}
+}
+
+// Store the file located at tmppath in the cache with the given name. The
+// tmppath may or may not be gone afterwards.
+//
+// Note: the configKey is ignored, see cacheLoad.
+func cacheStore(tmppath, name, configKey string, sourceFiles []string) (string, error) {
+	// get the last modified time
+	if len(sourceFiles) == 0 {
+		panic("cache: no source files")
+	}
+
+	// TODO: check the config key
+
+	dir := cacheDir()
+	err := os.MkdirAll(dir, 0777)
+	if err != nil {
+		return "", err
+	}
+	cachepath := filepath.Join(dir, name)
+	err = os.Rename(tmppath, cachepath)
+	if err != nil {
+		inf, err := os.Open(tmppath)
+		if err != nil {
+			return "", err
+		}
+		defer inf.Close()
+		outf, err := os.Create(cachepath + ".tmp")
+		if err != nil {
+			return "", err
+		}
+
+		_, err = io.Copy(outf, inf)
+		if err != nil {
+			return "", err
+		}
+
+		err = os.Rename(cachepath+".tmp", cachepath)
+		if err != nil {
+			return "", err
+		}
+
+		return cachepath, outf.Close()
+	}
+	return cachepath, nil
+}

builder/ar.go

@@ -1,206 +0,0 @@
-package builder
-
-import (
-	"bytes"
-	"debug/elf"
-	"debug/pe"
-	"encoding/binary"
-	"errors"
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"time"
-
-	"github.com/blakesmith/ar"
-)
-
-// makeArchive creates an arcive for static linking from a list of object files
-// given as a parameter. It is equivalent to the following command:
-//
-//	ar -rcs <archivePath> <objs...>
-func makeArchive(arfile *os.File, objs []string) error {
-	// Open the archive file.
-	arwriter := ar.NewWriter(arfile)
-	err := arwriter.WriteGlobalHeader()
-	if err != nil {
-		return &os.PathError{Op: "write ar header", Path: arfile.Name(), Err: err}
-	}
-
-	// Open all object files and read the symbols for the symbol table.
-	symbolTable := []struct {
-		name      string // symbol name
-		fileIndex int    // index into objfiles
-	}{}
-	archiveOffsets := make([]int32, len(objs))
-	for i, objpath := range objs {
-		objfile, err := os.Open(objpath)
-		if err != nil {
-			return err
-		}
-
-		// Read the symbols and add them to the symbol table.
-		if dbg, err := elf.NewFile(objfile); err == nil {
-			symbols, err := dbg.Symbols()
-			if err != nil {
-				return err
-			}
-			for _, symbol := range symbols {
-				bind := elf.ST_BIND(symbol.Info)
-				if bind != elf.STB_GLOBAL && bind != elf.STB_WEAK {
-					// Don't include local symbols (STB_LOCAL).
-					continue
-				}
-				if elf.ST_TYPE(symbol.Info) != elf.STT_FUNC && elf.ST_TYPE(symbol.Info) != elf.STT_OBJECT {
-					// Not a function.
-					continue
-				}
-				// Include in archive.
-				symbolTable = append(symbolTable, struct {
-					name      string
-					fileIndex int
-				}{symbol.Name, i})
-			}
-		} else if dbg, err := pe.NewFile(objfile); err == nil {
-			for _, symbol := range dbg.Symbols {
-				if symbol.StorageClass != 2 {
-					continue
-				}
-				if symbol.SectionNumber == 0 {
-					continue
-				}
-				symbolTable = append(symbolTable, struct {
-					name      string
-					fileIndex int
-				}{symbol.Name, i})
-			}
-		} else {
-			return fmt.Errorf("failed to open file %s as ELF or PE/COFF: %w", objpath, err)
-		}
-
-		// Close file, to avoid issues with too many open files (especially on
-		// MacOS X).
-		objfile.Close()
-	}
-
-	// Create the symbol table buffer.
-	// For some (sparse) details on the file format:
-	// https://en.wikipedia.org/wiki/Ar_(Unix)#System_V_(or_GNU)_variant
-	buf := &bytes.Buffer{}
-	binary.Write(buf, binary.BigEndian, int32(len(symbolTable)))
-	for range symbolTable {
-		// This is a placeholder index, it will be updated after all files have
-		// been written to the archive (see the end of this function).
-		err = binary.Write(buf, binary.BigEndian, int32(0))
-		if err != nil {
-			return err
-		}
-	}
-	for _, sym := range symbolTable {
-		_, err := buf.Write([]byte(sym.name + "\x00"))
-		if err != nil {
-			return err
-		}
-	}
-	for buf.Len()%2 != 0 {
-		// The symbol table must be aligned.
-		// This appears to be required by lld.
-		buf.WriteByte(0)
-	}
-
-	// Write the symbol table.
-	err = arwriter.WriteHeader(&ar.Header{
-		Name:    "/",
-		ModTime: time.Unix(0, 0),
-		Uid:     0,
-		Gid:     0,
-		Mode:    0,
-		Size:    int64(buf.Len()),
-	})
-	if err != nil {
-		return err
-	}
-
-	// Keep track of the start of the symbol table.
-	symbolTableStart, err := arfile.Seek(0, os.SEEK_CUR)
-	if err != nil {
-		return err
-	}
-
-	// Write symbol table contents.
-	_, err = arfile.Write(buf.Bytes())
-	if err != nil {
-		return err
-	}
-
-	// Add all object files to the archive.
-	var copyBuf bytes.Buffer
-	for i, objpath := range objs {
-		objfile, err := os.Open(objpath)
-		if err != nil {
-			return err
-		}
-		defer objfile.Close()
-
-		// Store the start index, for when we'll update the symbol table with
-		// the correct file start indices.
-		offset, err := arfile.Seek(0, os.SEEK_CUR)
-		if err != nil {
-			return err
-		}
-		if int64(int32(offset)) != offset {
-			return errors.New("large archives (4GB+) not supported: " + arfile.Name())
-		}
-		archiveOffsets[i] = int32(offset)
-
-		// Write the file header.
-		st, err := objfile.Stat()
-		if err != nil {
-			return err
-		}
-		err = arwriter.WriteHeader(&ar.Header{
-			Name:    filepath.Base(objfile.Name()),
-			ModTime: time.Unix(0, 0),
-			Uid:     0,
-			Gid:     0,
-			Mode:    0644,
-			Size:    st.Size(),
-		})
-		if err != nil {
-			return err
-		}
-
-		// Copy the file contents into the archive.
-		// First load all contents into a buffer, then write it all in one go to
-		// the archive file. This is a bit complicated, but is necessary because
-		// io.Copy can't deal with files that are of an odd size.
-		copyBuf.Reset()
-		n, err := io.Copy(&copyBuf, objfile)
-		if err != nil {
-			return fmt.Errorf("could not copy object file into ar file: %w", err)
-		}
-		if n != st.Size() {
-			return errors.New("file modified during ar creation: " + arfile.Name())
-		}
-		_, err = arwriter.Write(copyBuf.Bytes())
-		if err != nil {
-			return fmt.Errorf("could not copy object file into ar file: %w", err)
-		}
-
-		// File is not needed anymore.
-		objfile.Close()
-	}
-
-	// Create symbol indices.
-	indicesBuf := &bytes.Buffer{}
-	for _, sym := range symbolTable {
-		err = binary.Write(indicesBuf, binary.BigEndian, archiveOffsets[sym.fileIndex])
-		if err != nil {
-			return err
-		}
-	}
-
-	// Overwrite placeholder indices.
-	_, err = arfile.WriteAt(indicesBuf.Bytes(), symbolTableStart+4)
-	return err
-}

builder/builder_test.go

@@ -1,168 +0,0 @@
-package builder
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"runtime"
-	"testing"
-
-	"github.com/tinygo-org/tinygo/compileopts"
-	"github.com/tinygo-org/tinygo/goenv"
-	"tinygo.org/x/go-llvm"
-)
-
-// Test whether the Clang generated "target-cpu" and "target-features"
-// attributes match the CPU and Features property in TinyGo target files.
-func TestClangAttributes(t *testing.T) {
-	var targetNames = []string{
-		// Please keep this list sorted!
-		"atmega328p",
-		"atmega1280",
-		"atmega1284p",
-		"atmega2560",
-		"attiny85",
-		"cortex-m0",
-		"cortex-m0plus",
-		"cortex-m3",
-		"cortex-m33",
-		"cortex-m4",
-		"cortex-m7",
-		"esp32c3",
-		"fe310",
-		"gameboy-advance",
-		"k210",
-		"nintendoswitch",
-		"riscv-qemu",
-		"wasi",
-		"wasm",
-	}
-	if hasBuiltinTools {
-		// hasBuiltinTools is set when TinyGo is statically linked with LLVM,
-		// which also implies it was built with Xtensa support.
-		targetNames = append(targetNames, "esp32", "esp8266")
-	}
-	for _, targetName := range targetNames {
-		targetName := targetName
-		t.Run(targetName, func(t *testing.T) {
-			testClangAttributes(t, &compileopts.Options{Target: targetName})
-		})
-	}
-
-	for _, options := range []*compileopts.Options{
-		{GOOS: "linux", GOARCH: "386"},
-		{GOOS: "linux", GOARCH: "amd64"},
-		{GOOS: "linux", GOARCH: "arm", GOARM: "5"},
-		{GOOS: "linux", GOARCH: "arm", GOARM: "6"},
-		{GOOS: "linux", GOARCH: "arm", GOARM: "7"},
-		{GOOS: "linux", GOARCH: "arm64"},
-		{GOOS: "darwin", GOARCH: "amd64"},
-		{GOOS: "darwin", GOARCH: "arm64"},
-		{GOOS: "windows", GOARCH: "amd64"},
-		{GOOS: "windows", GOARCH: "arm64"},
-	} {
-		name := "GOOS=" + options.GOOS + ",GOARCH=" + options.GOARCH
-		if options.GOARCH == "arm" {
-			name += ",GOARM=" + options.GOARM
-		}
-		t.Run(name, func(t *testing.T) {
-			testClangAttributes(t, options)
-		})
-	}
-}
-
-func testClangAttributes(t *testing.T, options *compileopts.Options) {
-	testDir := t.TempDir()
-	clangHeaderPath := getClangHeaderPath(goenv.Get("TINYGOROOT"))
-
-	ctx := llvm.NewContext()
-	defer ctx.Dispose()
-
-	target, err := compileopts.LoadTarget(options)
-	if err != nil {
-		t.Fatalf("could not load target: %s", err)
-	}
-	config := compileopts.Config{
-		Options:      options,
-		Target:       target,
-		ClangHeaders: clangHeaderPath,
-	}
-
-	// Create a very simple C input file.
-	srcpath := filepath.Join(testDir, "test.c")
-	err = os.WriteFile(srcpath, []byte("int add(int a, int b) { return a + b; }"), 0o666)
-	if err != nil {
-		t.Fatalf("could not write target file %s: %s", srcpath, err)
-	}
-
-	// Compile this file using Clang.
-	outpath := filepath.Join(testDir, "test.bc")
-	flags := append([]string{"-c", "-emit-llvm", "-o", outpath, srcpath}, config.CFlags()...)
-	if config.GOOS() == "darwin" {
-		// Silence some warnings that happen when testing GOOS=darwin on
-		// something other than MacOS.
-		flags = append(flags, "-Wno-missing-sysroot", "-Wno-incompatible-sysroot")
-	}
-	err = runCCompiler(flags...)
-	if err != nil {
-		t.Fatalf("failed to compile %s: %s", srcpath, err)
-	}
-
-	// Read the resulting LLVM bitcode.
-	mod, err := ctx.ParseBitcodeFile(outpath)
-	if err != nil {
-		t.Fatalf("could not parse bitcode file %s: %s", outpath, err)
-	}
-	defer mod.Dispose()
-
-	// Check whether the LLVM target matches.
-	if mod.Target() != config.Triple() {
-		t.Errorf("target has LLVM triple %#v but Clang makes it LLVM triple %#v", config.Triple(), mod.Target())
-	}
-
-	// Check the "target-cpu" and "target-features" string attribute of the add
-	// function.
-	add := mod.NamedFunction("add")
-	var cpu, features string
-	cpuAttr := add.GetStringAttributeAtIndex(-1, "target-cpu")
-	featuresAttr := add.GetStringAttributeAtIndex(-1, "target-features")
-	if !cpuAttr.IsNil() {
-		cpu = cpuAttr.GetStringValue()
-	}
-	if !featuresAttr.IsNil() {
-		features = featuresAttr.GetStringValue()
-	}
-	if cpu != config.CPU() {
-		t.Errorf("target has CPU %#v but Clang makes it CPU %#v", config.CPU(), cpu)
-	}
-	if features != config.Features() {
-		if hasBuiltinTools || runtime.GOOS != "linux" {
-			// Skip this step when using an external Clang invocation on Linux.
-			// The reason is that Debian has patched Clang in a way that
-			// modifies the LLVM features string, changing lots of FPU/float
-			// related flags. We want to test vanilla Clang, not Debian Clang.
-			t.Errorf("target has LLVM features\n\t%#v\nbut Clang makes it\n\t%#v", config.Features(), features)
-		}
-	}
-}
-
-// This TestMain is necessary because TinyGo may also be invoked to run certain
-// LLVM tools in a separate process. Not capturing these invocations would lead
-// to recursive tests.
-func TestMain(m *testing.M) {
-	if len(os.Args) >= 2 {
-		switch os.Args[1] {
-		case "clang", "ld.lld", "wasm-ld":
-			// Invoke a specific tool.
-			err := RunTool(os.Args[1], os.Args[2:]...)
-			if err != nil {
-				fmt.Fprintln(os.Stderr, err)
-				os.Exit(1)
-			}
-			os.Exit(0)
-		}
-	}
-
-	// Run normal tests.
-	os.Exit(m.Run())
-}

builder/buildid.go

@@ -1,103 +0,0 @@
-package builder
-
-import (
-	"bytes"
-	"debug/elf"
-	"debug/macho"
-	"encoding/binary"
-	"fmt"
-	"io"
-	"os"
-	"runtime"
-)
-
-// ReadBuildID reads the build ID from the currently running executable.
-func ReadBuildID() ([]byte, error) {
-	executable, err := os.Executable()
-	if err != nil {
-		return nil, err
-	}
-	f, err := os.Open(executable)
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-
-	switch runtime.GOOS {
-	case "linux", "freebsd", "android":
-		// Read the GNU build id section. (Not sure about FreeBSD though...)
-		file, err := elf.NewFile(f)
-		if err != nil {
-			return nil, err
-		}
-		var gnuID, goID []byte
-		for _, section := range file.Sections {
-			if section.Type != elf.SHT_NOTE ||
-				(section.Name != ".note.gnu.build-id" && section.Name != ".note.go.buildid") {
-				continue
-			}
-			buf := make([]byte, section.Size)
-			n, err := section.ReadAt(buf, 0)
-			if uint64(n) != section.Size || err != nil {
-				return nil, fmt.Errorf("could not read build id: %w", err)
-			}
-			if section.Name == ".note.gnu.build-id" {
-				gnuID = buf
-			} else {
-				goID = buf
-			}
-		}
-		if gnuID != nil {
-			return gnuID, nil
-		} else if goID != nil {
-			return goID, nil
-		}
-	case "darwin":
-		// Read the LC_UUID load command, which contains the equivalent of a
-		// build ID.
-		file, err := macho.NewFile(f)
-		if err != nil {
-			return nil, err
-		}
-		for _, load := range file.Loads {
-			// Unfortunately, the debug/macho package doesn't support the
-			// LC_UUID command directly. So we have to read it from
-			// macho.LoadBytes.
-			load, ok := load.(macho.LoadBytes)
-			if !ok {
-				continue
-			}
-			raw := load.Raw()
-			command := binary.LittleEndian.Uint32(raw)
-			if command != 0x1b {
-				// Looking for the LC_UUID load command.
-				// LC_UUID is defined here as 0x1b:
-				// https://opensource.apple.com/source/xnu/xnu-4570.71.2/EXTERNAL_HEADERS/mach-o/loader.h.auto.html
-				continue
-			}
-			return raw[4:], nil
-		}
-	default:
-		// On other platforms (such as Windows) there isn't such a convenient
-		// build ID. Luckily, Go does have an equivalent of the build ID, which
-		// is stored as a special symbol named go.buildid. You can read it
-		// using `go tool buildid`, but the code below extracts it directly
-		// from the binary.
-		// Unfortunately, because of stripping with the -w flag, no symbol
-		// table might be available. Therefore, we have to scan the binary
-		// directly. Luckily the build ID is always at the start of the file.
-		// For details, see:
-		// https://github.com/golang/go/blob/master/src/cmd/internal/buildid/buildid.go
-		fileStart := make([]byte, 4096)
-		_, err := io.ReadFull(f, fileStart)
-		index := bytes.Index(fileStart, []byte("\xff Go build ID: \""))
-		if index < 0 || index > len(fileStart)-103 {
-			return nil, fmt.Errorf("could not find build id in %s", err)
-		}
-		buf := fileStart[index : index+103]
-		if bytes.HasPrefix(buf, []byte("\xff Go build ID: \"")) && bytes.HasSuffix(buf, []byte("\"\n \xff")) {
-			return buf[len("\xff Go build ID: \"") : len(buf)-1], nil
-		}
-	}
-	return nil, fmt.Errorf("could not find build ID in %s", executable)
-}

builder/cc.go

@@ -1,318 +0,0 @@
-package builder
-
-// This file implements a wrapper around the C compiler (Clang) which uses a
-// build cache.
-
-import (
-	"crypto/sha512"
-	"encoding/hex"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"io/fs"
-	"os"
-	"path/filepath"
-	"sort"
-	"strings"
-	"unicode"
-
-	"github.com/tinygo-org/tinygo/goenv"
-	"tinygo.org/x/go-llvm"
-)
-
-// compileAndCacheCFile compiles a C or assembly file using a build cache.
-// Compiling the same file again (if nothing changed, including included header
-// files) the output is loaded from the build cache instead.
-//
-// Its operation is a bit complex (more complex than Go package build caching)
-// because the list of file dependencies is only known after the file is
-// compiled. However, luckily compilers have a flag to write a list of file
-// dependencies in Makefile syntax which can be used for caching.
-//
-// Because of this complexity, every file has in fact two cached build outputs:
-// the file itself, and the list of dependencies. Its operation is as follows:
-//
-//	depfile = hash(path, compiler, cflags, ...)
-//	if depfile exists:
-//	  outfile = hash of all files and depfile name
-//	  if outfile exists:
-//	    # cache hit
-//	    return outfile
-//	# cache miss
-//	tmpfile = compile file
-//	read dependencies (side effect of compile)
-//	write depfile
-//	outfile = hash of all files and depfile name
-//	rename tmpfile to outfile
-//
-// There are a few edge cases that are not handled:
-//   - If a file is added to an include path, that file may be included instead of
-//     some other file. This would be fixed by also including lookup failures in the
-//     dependencies file, but I'm not aware of a compiler which does that.
-//   - The Makefile syntax that compilers output has issues, see readDepFile for
-//     details.
-//   - A header file may be changed to add/remove an include. This invalidates the
-//     depfile but without invalidating its name. For this reason, the depfile is
-//     written on each new compilation (even when it seems unnecessary). However, it
-//     could in rare cases lead to a stale file fetched from the cache.
-func compileAndCacheCFile(abspath, tmpdir string, cflags []string, printCommands func(string, ...string)) (string, error) {
-	// Hash input file.
-	fileHash, err := hashFile(abspath)
-	if err != nil {
-		return "", err
-	}
-
-	// Acquire a lock (if supported).
-	unlock := lock(filepath.Join(goenv.Get("GOCACHE"), fileHash+".c.lock"))
-	defer unlock()
-
-	// Create cache key for the dependencies file.
-	buf, err := json.Marshal(struct {
-		Path        string
-		Hash        string
-		Flags       []string
-		LLVMVersion string
-	}{
-		Path:        abspath,
-		Hash:        fileHash,
-		Flags:       cflags,
-		LLVMVersion: llvm.Version,
-	})
-	if err != nil {
-		panic(err) // shouldn't happen
-	}
-	depfileNameHashBuf := sha512.Sum512_224(buf)
-	depfileNameHash := hex.EncodeToString(depfileNameHashBuf[:])
-
-	// Load dependencies file, if possible.
-	depfileName := "dep-" + depfileNameHash + ".json"
-	depfileCachePath := filepath.Join(goenv.Get("GOCACHE"), depfileName)
-	depfileBuf, err := os.ReadFile(depfileCachePath)
-	var dependencies []string // sorted list of dependency paths
-	if err == nil {
-		// There is a dependency file, that's great!
-		// Parse it first.
-		err := json.Unmarshal(depfileBuf, &dependencies)
-		if err != nil {
-			return "", fmt.Errorf("could not parse dependencies JSON: %w", err)
-		}
-
-		// Obtain hashes of all the files listed as a dependency.
-		outpath, err := makeCFileCachePath(dependencies, depfileNameHash)
-		if err == nil {
-			if _, err := os.Stat(outpath); err == nil {
-				return outpath, nil
-			} else if !errors.Is(err, fs.ErrNotExist) {
-				return "", err
-			}
-		}
-	} else if !errors.Is(err, fs.ErrNotExist) {
-		// expected either nil or IsNotExist
-		return "", err
-	}
-
-	objTmpFile, err := os.CreateTemp(goenv.Get("GOCACHE"), "tmp-*.bc")
-	if err != nil {
-		return "", err
-	}
-	objTmpFile.Close()
-	depTmpFile, err := os.CreateTemp(tmpdir, "dep-*.d")
-	if err != nil {
-		return "", err
-	}
-	depTmpFile.Close()
-	flags := append([]string{}, cflags...)                                                 // copy cflags
-	flags = append(flags, "-MD", "-MV", "-MTdeps", "-MF", depTmpFile.Name(), "-flto=thin") // autogenerate dependencies
-	flags = append(flags, "-c", "-o", objTmpFile.Name(), abspath)
-	if strings.ToLower(filepath.Ext(abspath)) == ".s" {
-		// If this is an assembly file (.s or .S, lowercase or uppercase), then
-		// we'll need to add -Qunused-arguments because many parameters are
-		// relevant to C, not assembly. And with -Werror, having meaningless
-		// flags (for the assembler) is a compiler error.
-		flags = append(flags, "-Qunused-arguments")
-	}
-	if printCommands != nil {
-		printCommands("clang", flags...)
-	}
-	err = runCCompiler(flags...)
-	if err != nil {
-		return "", &commandError{"failed to build", abspath, err}
-	}
-
-	// Create sorted and uniqued slice of dependencies.
-	dependencyPaths, err := readDepFile(depTmpFile.Name())
-	if err != nil {
-		return "", err
-	}
-	dependencyPaths = append(dependencyPaths, abspath) // necessary for .s files
-	dependencySet := make(map[string]struct{}, len(dependencyPaths))
-	var dependencySlice []string
-	for _, path := range dependencyPaths {
-		if _, ok := dependencySet[path]; ok {
-			continue
-		}
-		dependencySet[path] = struct{}{}
-		dependencySlice = append(dependencySlice, path)
-	}
-	sort.Strings(dependencySlice)
-
-	// Write dependencies file.
-	f, err := os.CreateTemp(filepath.Dir(depfileCachePath), depfileName)
-	if err != nil {
-		return "", err
-	}
-
-	buf, err = json.MarshalIndent(dependencySlice, "", "\t")
-	if err != nil {
-		panic(err) // shouldn't happen
-	}
-	_, err = f.Write(buf)
-	if err != nil {
-		return "", err
-	}
-	err = f.Close()
-	if err != nil {
-		return "", err
-	}
-	err = os.Rename(f.Name(), depfileCachePath)
-	if err != nil {
-		return "", err
-	}
-
-	// Move temporary object file to final location.
-	outpath, err := makeCFileCachePath(dependencySlice, depfileNameHash)
-	if err != nil {
-		return "", err
-	}
-	err = os.Rename(objTmpFile.Name(), outpath)
-	if err != nil {
-		return "", err
-	}
-
-	return outpath, nil
-}
-
-// Create a cache path (a path in GOCACHE) to store the output of a compiler
-// job. This path is based on the dep file name (which is a hash of metadata
-// including compiler flags) and the hash of all input files in the paths slice.
-func makeCFileCachePath(paths []string, depfileNameHash string) (string, error) {
-	// Hash all input files.
-	fileHashes := make(map[string]string, len(paths))
-	for _, path := range paths {
-		hash, err := hashFile(path)
-		if err != nil {
-			return "", err
-		}
-		fileHashes[path] = hash
-	}
-
-	// Calculate a cache key based on the above hashes.
-	buf, err := json.Marshal(struct {
-		DepfileHash string
-		FileHashes  map[string]string
-	}{
-		DepfileHash: depfileNameHash,
-		FileHashes:  fileHashes,
-	})
-	if err != nil {
-		panic(err) // shouldn't happen
-	}
-	outFileNameBuf := sha512.Sum512_224(buf)
-	cacheKey := hex.EncodeToString(outFileNameBuf[:])
-
-	outpath := filepath.Join(goenv.Get("GOCACHE"), "obj-"+cacheKey+".bc")
-	return outpath, nil
-}
-
-// hashFile hashes the given file path and returns the hash as a hex string.
-func hashFile(path string) (string, error) {
-	f, err := os.Open(path)
-	if err != nil {
-		return "", fmt.Errorf("failed to hash file: %w", err)
-	}
-	defer f.Close()
-	fileHasher := sha512.New512_224()
-	_, err = io.Copy(fileHasher, f)
-	if err != nil {
-		return "", fmt.Errorf("failed to hash file: %w", err)
-	}
-	return hex.EncodeToString(fileHasher.Sum(nil)), nil
-}
-
-// readDepFile reads a dependency file in NMake (Visual Studio make) format. The
-// file is assumed to have a single target named deps.
-//
-// There are roughly three make syntax variants:
-//   - BSD make, which doesn't support any escaping. This means that many special
-//     characters are not supported in file names.
-//   - GNU make, which supports escaping using a backslash but when it fails to
-//     find a file it tries to fall back with the literal path name (to match BSD
-//     make).
-//   - NMake (Visual Studio) and Jom, which simply quote the string if there are
-//     any weird characters.
-//
-// Clang supports two variants: a format that's a compromise between BSD and GNU
-// make (and is buggy to match GCC which is equally buggy), and NMake/Jom, which
-// is at least somewhat sane. This last format isn't perfect either: it does not
-// correctly handle filenames with quote marks in them. Those are generally not
-// allowed on Windows, but of course can be used on POSIX like systems. Still,
-// it's the most sane of any of the formats so readDepFile will use that format.
-func readDepFile(filename string) ([]string, error) {
-	buf, err := os.ReadFile(filename)
-	if err != nil {
-		return nil, err
-	}
-	if len(buf) == 0 {
-		return nil, nil
-	}
-	return parseDepFile(string(buf))
-}
-
-func parseDepFile(s string) ([]string, error) {
-	// This function makes no attempt at parsing anything other than Clang -MD
-	// -MV output.
-
-	// For Windows: replace CRLF with LF to make the logic below simpler.
-	s = strings.ReplaceAll(s, "\r\n", "\n")
-
-	// Collapse all lines ending in a backslash. These backslashes are really
-	// just a way to continue a line without making very long lines.
-	s = strings.ReplaceAll(s, "\\\n", " ")
-
-	// Only use the first line, which is expected to begin with "deps:".
-	line := strings.SplitN(s, "\n", 2)[0]
-	if !strings.HasPrefix(line, "deps:") {
-		return nil, errors.New("readDepFile: expected 'deps:' prefix")
-	}
-	line = strings.TrimSpace(line[len("deps:"):])
-
-	var deps []string
-	for line != "" {
-		if line[0] == '"' {
-			// File path is quoted. Path ends with double quote.
-			// This does not handle double quotes in path names, which is a
-			// problem on non-Windows systems.
-			line = line[1:]
-			end := strings.IndexByte(line, '"')
-			if end < 0 {
-				return nil, errors.New("readDepFile: path is incorrectly quoted")
-			}
-			dep := line[:end]
-			line = strings.TrimSpace(line[end+1:])
-			deps = append(deps, dep)
-		} else {
-			// File path is not quoted. Path ends in space or EOL.
-			end := strings.IndexFunc(line, unicode.IsSpace)
-			if end < 0 {
-				// last dependency
-				deps = append(deps, line)
-				break
-			}
-			dep := line[:end]
-			line = strings.TrimSpace(line[end:])
-			deps = append(deps, dep)
-		}
-	}
-	return deps, nil
-}

builder/cc1as.cpp

@@ -1,532 +0,0 @@
-//go:build byollvm
-
-//===-- cc1as.cpp - Clang Assembler  --------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This is the entry point to the clang -cc1as functionality, which implements
-// the direct interface to the LLVM MC based assembler.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/Basic/Diagnostic.h"
-#include "clang/Basic/DiagnosticOptions.h"
-#include "clang/Driver/DriverDiagnostic.h"
-#include "clang/Driver/Options.h"
-#include "clang/Frontend/FrontendDiagnostic.h"
-#include "clang/Frontend/TextDiagnosticPrinter.h"
-#include "clang/Frontend/Utils.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/StringSwitch.h"
-#include "llvm/ADT/Triple.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/MC/MCAsmBackend.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCCodeEmitter.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCInstrInfo.h"
-#include "llvm/MC/MCObjectFileInfo.h"
-#include "llvm/MC/MCObjectWriter.h"
-#include "llvm/MC/MCParser/MCAsmParser.h"
-#include "llvm/MC/MCParser/MCTargetAsmParser.h"
-#include "llvm/MC/MCRegisterInfo.h"
-#include "llvm/MC/MCSectionMachO.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSubtargetInfo.h"
-#include "llvm/MC/MCTargetOptions.h"
-#include "llvm/MC/TargetRegistry.h"
-#include "llvm/Option/Arg.h"
-#include "llvm/Option/ArgList.h"
-#include "llvm/Option/OptTable.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/FormattedStream.h"
-#include "llvm/Support/Host.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/Process.h"
-#include "llvm/Support/Signals.h"
-#include "llvm/Support/SourceMgr.h"
-#include "llvm/Support/TargetSelect.h"
-#include "llvm/Support/Timer.h"
-#include "llvm/Support/raw_ostream.h"
-#include <memory>
-#include <system_error>
-using namespace clang;
-using namespace clang::driver;
-using namespace clang::driver::options;
-using namespace llvm;
-using namespace llvm::opt;
-
-#include "cc1as.h"
-
-bool AssemblerInvocation::CreateFromArgs(AssemblerInvocation &Opts,
-                                         ArrayRef<const char *> Argv,
-                                         DiagnosticsEngine &Diags) {
-  bool Success = true;
-
-  // Parse the arguments.
-  const OptTable &OptTbl = getDriverOptTable();
-
-  const unsigned IncludedFlagsBitmask = options::CC1AsOption;
-  unsigned MissingArgIndex, MissingArgCount;
-  InputArgList Args = OptTbl.ParseArgs(Argv, MissingArgIndex, MissingArgCount,
-                                       IncludedFlagsBitmask);
-
-  // Check for missing argument error.
-  if (MissingArgCount) {
-    Diags.Report(diag::err_drv_missing_argument)
-        << Args.getArgString(MissingArgIndex) << MissingArgCount;
-    Success = false;
-  }
-
-  // Issue errors on unknown arguments.
-  for (const Arg *A : Args.filtered(OPT_UNKNOWN)) {
-    auto ArgString = A->getAsString(Args);
-    std::string Nearest;
-    if (OptTbl.findNearest(ArgString, Nearest, IncludedFlagsBitmask) > 1)
-      Diags.Report(diag::err_drv_unknown_argument) << ArgString;
-    else
-      Diags.Report(diag::err_drv_unknown_argument_with_suggestion)
-          << ArgString << Nearest;
-    Success = false;
-  }
-
-  // Construct the invocation.
-
-  // Target Options
-  Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
-  if (Arg *A = Args.getLastArg(options::OPT_darwin_target_variant_triple))
-    Opts.DarwinTargetVariantTriple = llvm::Triple(A->getValue());
-
-  Opts.CPU = std::string(Args.getLastArgValue(OPT_target_cpu));
-  Opts.Features = Args.getAllArgValues(OPT_target_feature);
-
-  // Use the default target triple if unspecified.
-  if (Opts.Triple.empty())
-    Opts.Triple = llvm::sys::getDefaultTargetTriple();
-
-  // Language Options
-  Opts.IncludePaths = Args.getAllArgValues(OPT_I);
-  Opts.NoInitialTextSection = Args.hasArg(OPT_n);
-  Opts.SaveTemporaryLabels = Args.hasArg(OPT_msave_temp_labels);
-  // Any DebugInfoKind implies GenDwarfForAssembly.
-  Opts.GenDwarfForAssembly = Args.hasArg(OPT_debug_info_kind_EQ);
-
-  if (const Arg *A = Args.getLastArg(OPT_compress_debug_sections_EQ)) {
-    Opts.CompressDebugSections =
-        llvm::StringSwitch<llvm::DebugCompressionType>(A->getValue())
-            .Case("none", llvm::DebugCompressionType::None)
-            .Case("zlib", llvm::DebugCompressionType::Z)
-            .Default(llvm::DebugCompressionType::None);
-  }
-
-  Opts.RelaxELFRelocations = Args.hasArg(OPT_mrelax_relocations);
-  if (auto *DwarfFormatArg = Args.getLastArg(OPT_gdwarf64, OPT_gdwarf32))
-    Opts.Dwarf64 = DwarfFormatArg->getOption().matches(OPT_gdwarf64);
-  Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 2, Diags);
-  Opts.DwarfDebugFlags =
-      std::string(Args.getLastArgValue(OPT_dwarf_debug_flags));
-  Opts.DwarfDebugProducer =
-      std::string(Args.getLastArgValue(OPT_dwarf_debug_producer));
-  if (const Arg *A = Args.getLastArg(options::OPT_ffile_compilation_dir_EQ,
-                                     options::OPT_fdebug_compilation_dir_EQ))
-    Opts.DebugCompilationDir = A->getValue();
-  Opts.MainFileName = std::string(Args.getLastArgValue(OPT_main_file_name));
-
-  for (const auto &Arg : Args.getAllArgValues(OPT_fdebug_prefix_map_EQ)) {
-    auto Split = StringRef(Arg).split('=');
-    Opts.DebugPrefixMap.insert(
-        {std::string(Split.first), std::string(Split.second)});
-  }
-
-  // Frontend Options
-  if (Args.hasArg(OPT_INPUT)) {
-    bool First = true;
-    for (const Arg *A : Args.filtered(OPT_INPUT)) {
-      if (First) {
-        Opts.InputFile = A->getValue();
-        First = false;
-      } else {
-        Diags.Report(diag::err_drv_unknown_argument) << A->getAsString(Args);
-        Success = false;
-      }
-    }
-  }
-  Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
-  Opts.OutputPath = std::string(Args.getLastArgValue(OPT_o));
-  Opts.SplitDwarfOutput =
-      std::string(Args.getLastArgValue(OPT_split_dwarf_output));
-  if (Arg *A = Args.getLastArg(OPT_filetype)) {
-    StringRef Name = A->getValue();
-    unsigned OutputType = StringSwitch<unsigned>(Name)
-      .Case("asm", FT_Asm)
-      .Case("null", FT_Null)
-      .Case("obj", FT_Obj)
-      .Default(~0U);
-    if (OutputType == ~0U) {
-      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
-      Success = false;
-    } else
-      Opts.OutputType = FileType(OutputType);
-  }
-  Opts.ShowHelp = Args.hasArg(OPT_help);
-  Opts.ShowVersion = Args.hasArg(OPT_version);
-
-  // Transliterate Options
-  Opts.OutputAsmVariant =
-      getLastArgIntValue(Args, OPT_output_asm_variant, 0, Diags);
-  Opts.ShowEncoding = Args.hasArg(OPT_show_encoding);
-  Opts.ShowInst = Args.hasArg(OPT_show_inst);
-
-  // Assemble Options
-  Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
-  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
-  Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
-  Opts.NoWarn = Args.hasArg(OPT_massembler_no_warn);
-  Opts.RelocationModel =
-      std::string(Args.getLastArgValue(OPT_mrelocation_model, "pic"));
-  Opts.TargetABI = std::string(Args.getLastArgValue(OPT_target_abi));
-  Opts.IncrementalLinkerCompatible =
-      Args.hasArg(OPT_mincremental_linker_compatible);
-  Opts.SymbolDefs = Args.getAllArgValues(OPT_defsym);
-
-  // EmbedBitcode Option. If -fembed-bitcode is enabled, set the flag.
-  // EmbedBitcode behaves the same for all embed options for assembly files.
-  if (auto *A = Args.getLastArg(OPT_fembed_bitcode_EQ)) {
-    Opts.EmbedBitcode = llvm::StringSwitch<unsigned>(A->getValue())
-                            .Case("all", 1)
-                            .Case("bitcode", 1)
-                            .Case("marker", 1)
-                            .Default(0);
-  }
-
-  if (auto *A = Args.getLastArg(OPT_femit_dwarf_unwind_EQ)) {
-    Opts.EmitDwarfUnwind =
-        llvm::StringSwitch<EmitDwarfUnwindType>(A->getValue())
-            .Case("always", EmitDwarfUnwindType::Always)
-            .Case("no-compact-unwind", EmitDwarfUnwindType::NoCompactUnwind)
-            .Case("default", EmitDwarfUnwindType::Default);
-  }
-
-  return Success;
-}
-
-static std::unique_ptr<raw_fd_ostream>
-getOutputStream(StringRef Path, DiagnosticsEngine &Diags, bool Binary) {
-  // Make sure that the Out file gets unlinked from the disk if we get a
-  // SIGINT.
-  if (Path != "-")
-    sys::RemoveFileOnSignal(Path);
-
-  std::error_code EC;
-  auto Out = std::make_unique<raw_fd_ostream>(
-      Path, EC, (Binary ? sys::fs::OF_None : sys::fs::OF_TextWithCRLF));
-  if (EC) {
-    Diags.Report(diag::err_fe_unable_to_open_output) << Path << EC.message();
-    return nullptr;
-  }
-
-  return Out;
-}
-
-static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
-                                 DiagnosticsEngine &Diags) {
-  // Get the target specific parser.
-  std::string Error;
-  const Target *TheTarget = TargetRegistry::lookupTarget(Opts.Triple, Error);
-  if (!TheTarget)
-    return Diags.Report(diag::err_target_unknown_triple) << Opts.Triple;
-
-  ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer =
-      MemoryBuffer::getFileOrSTDIN(Opts.InputFile, /*IsText=*/true);
-
-  if (std::error_code EC = Buffer.getError()) {
-    Error = EC.message();
-    return Diags.Report(diag::err_fe_error_reading) << Opts.InputFile;
-  }
-
-  SourceMgr SrcMgr;
-
-  // Tell SrcMgr about this buffer, which is what the parser will pick up.
-  unsigned BufferIndex = SrcMgr.AddNewSourceBuffer(std::move(*Buffer), SMLoc());
-
-  // Record the location of the include directories so that the lexer can find
-  // it later.
-  SrcMgr.setIncludeDirs(Opts.IncludePaths);
-
-  std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(Opts.Triple));
-  assert(MRI && "Unable to create target register info!");
-
-  MCTargetOptions MCOptions;
-  MCOptions.EmitDwarfUnwind = Opts.EmitDwarfUnwind;
-
-  std::unique_ptr<MCAsmInfo> MAI(
-      TheTarget->createMCAsmInfo(*MRI, Opts.Triple, MCOptions));
-  assert(MAI && "Unable to create target asm info!");
-
-  // Ensure MCAsmInfo initialization occurs before any use, otherwise sections
-  // may be created with a combination of default and explicit settings.
-  MAI->setCompressDebugSections(Opts.CompressDebugSections);
-
-  MAI->setRelaxELFRelocations(Opts.RelaxELFRelocations);
-
-  bool IsBinary = Opts.OutputType == AssemblerInvocation::FT_Obj;
-  if (Opts.OutputPath.empty())
-    Opts.OutputPath = "-";
-  std::unique_ptr<raw_fd_ostream> FDOS =
-      getOutputStream(Opts.OutputPath, Diags, IsBinary);
-  if (!FDOS)
-    return true;
-  std::unique_ptr<raw_fd_ostream> DwoOS;
-  if (!Opts.SplitDwarfOutput.empty())
-    DwoOS = getOutputStream(Opts.SplitDwarfOutput, Diags, IsBinary);
-
-  // Build up the feature string from the target feature list.
-  std::string FS = llvm::join(Opts.Features, ",");
-
-  std::unique_ptr<MCSubtargetInfo> STI(
-      TheTarget->createMCSubtargetInfo(Opts.Triple, Opts.CPU, FS));
-  assert(STI && "Unable to create subtarget info!");
-
-  MCContext Ctx(Triple(Opts.Triple), MAI.get(), MRI.get(), STI.get(), &SrcMgr,
-                &MCOptions);
-
-  bool PIC = false;
-  if (Opts.RelocationModel == "static") {
-    PIC = false;
-  } else if (Opts.RelocationModel == "pic") {
-    PIC = true;
-  } else {
-    assert(Opts.RelocationModel == "dynamic-no-pic" &&
-           "Invalid PIC model!");
-    PIC = false;
-  }
-
-  // FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and
-  // MCObjectFileInfo needs a MCContext reference in order to initialize itself.
-  std::unique_ptr<MCObjectFileInfo> MOFI(
-      TheTarget->createMCObjectFileInfo(Ctx, PIC));
-  if (Opts.DarwinTargetVariantTriple)
-    MOFI->setDarwinTargetVariantTriple(*Opts.DarwinTargetVariantTriple);
-  Ctx.setObjectFileInfo(MOFI.get());
-
-  if (Opts.SaveTemporaryLabels)
-    Ctx.setAllowTemporaryLabels(false);
-  if (Opts.GenDwarfForAssembly)
-    Ctx.setGenDwarfForAssembly(true);
-  if (!Opts.DwarfDebugFlags.empty())
-    Ctx.setDwarfDebugFlags(StringRef(Opts.DwarfDebugFlags));
-  if (!Opts.DwarfDebugProducer.empty())
-    Ctx.setDwarfDebugProducer(StringRef(Opts.DwarfDebugProducer));
-  if (!Opts.DebugCompilationDir.empty())
-    Ctx.setCompilationDir(Opts.DebugCompilationDir);
-  else {
-    // If no compilation dir is set, try to use the current directory.
-    SmallString<128> CWD;
-    if (!sys::fs::current_path(CWD))
-      Ctx.setCompilationDir(CWD);
-  }
-  if (!Opts.DebugPrefixMap.empty())
-    for (const auto &KV : Opts.DebugPrefixMap)
-      Ctx.addDebugPrefixMapEntry(KV.first, KV.second);
-  if (!Opts.MainFileName.empty())
-    Ctx.setMainFileName(StringRef(Opts.MainFileName));
-  Ctx.setDwarfFormat(Opts.Dwarf64 ? dwarf::DWARF64 : dwarf::DWARF32);
-  Ctx.setDwarfVersion(Opts.DwarfVersion);
-  if (Opts.GenDwarfForAssembly)
-    Ctx.setGenDwarfRootFile(Opts.InputFile,
-                            SrcMgr.getMemoryBuffer(BufferIndex)->getBuffer());
-
-  std::unique_ptr<MCStreamer> Str;
-
-  std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());
-  assert(MCII && "Unable to create instruction info!");
-
-  raw_pwrite_stream *Out = FDOS.get();
-  std::unique_ptr<buffer_ostream> BOS;
-
-  MCOptions.MCNoWarn = Opts.NoWarn;
-  MCOptions.MCFatalWarnings = Opts.FatalWarnings;
-  MCOptions.ABIName = Opts.TargetABI;
-
-  // FIXME: There is a bit of code duplication with addPassesToEmitFile.
-  if (Opts.OutputType == AssemblerInvocation::FT_Asm) {
-    MCInstPrinter *IP = TheTarget->createMCInstPrinter(
-        llvm::Triple(Opts.Triple), Opts.OutputAsmVariant, *MAI, *MCII, *MRI);
-
-    std::unique_ptr<MCCodeEmitter> CE;
-    if (Opts.ShowEncoding)
-      CE.reset(TheTarget->createMCCodeEmitter(*MCII, Ctx));
-    std::unique_ptr<MCAsmBackend> MAB(
-        TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions));
-
-    auto FOut = std::make_unique<formatted_raw_ostream>(*Out);
-    Str.reset(TheTarget->createAsmStreamer(
-        Ctx, std::move(FOut), /*asmverbose*/ true,
-        /*useDwarfDirectory*/ true, IP, std::move(CE), std::move(MAB),
-        Opts.ShowInst));
-  } else if (Opts.OutputType == AssemblerInvocation::FT_Null) {
-    Str.reset(createNullStreamer(Ctx));
-  } else {
-    assert(Opts.OutputType == AssemblerInvocation::FT_Obj &&
-           "Invalid file type!");
-    if (!FDOS->supportsSeeking()) {
-      BOS = std::make_unique<buffer_ostream>(*FDOS);
-      Out = BOS.get();
-    }
-
-    std::unique_ptr<MCCodeEmitter> CE(
-        TheTarget->createMCCodeEmitter(*MCII, Ctx));
-    std::unique_ptr<MCAsmBackend> MAB(
-        TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions));
-    assert(MAB && "Unable to create asm backend!");
-
-    std::unique_ptr<MCObjectWriter> OW =
-        DwoOS ? MAB->createDwoObjectWriter(*Out, *DwoOS)
-              : MAB->createObjectWriter(*Out);
-
-    Triple T(Opts.Triple);
-    Str.reset(TheTarget->createMCObjectStreamer(
-        T, Ctx, std::move(MAB), std::move(OW), std::move(CE), *STI,
-        Opts.RelaxAll, Opts.IncrementalLinkerCompatible,
-        /*DWARFMustBeAtTheEnd*/ true));
-    Str.get()->initSections(Opts.NoExecStack, *STI);
-  }
-
-  // When -fembed-bitcode is passed to clang_as, a 1-byte marker
-  // is emitted in __LLVM,__asm section if the object file is MachO format.
-  if (Opts.EmbedBitcode && Ctx.getObjectFileType() == MCContext::IsMachO) {
-    MCSection *AsmLabel = Ctx.getMachOSection(
-        "__LLVM", "__asm", MachO::S_REGULAR, 4, SectionKind::getReadOnly());
-    Str.get()->switchSection(AsmLabel);
-    Str.get()->emitZeros(1);
-  }
-
-  // Assembly to object compilation should leverage assembly info.
-  Str->setUseAssemblerInfoForParsing(true);
-
-  bool Failed = false;
-
-  std::unique_ptr<MCAsmParser> Parser(
-      createMCAsmParser(SrcMgr, Ctx, *Str.get(), *MAI));
-
-  // FIXME: init MCTargetOptions from sanitizer flags here.
-  std::unique_ptr<MCTargetAsmParser> TAP(
-      TheTarget->createMCAsmParser(*STI, *Parser, *MCII, MCOptions));
-  if (!TAP)
-    Failed = Diags.Report(diag::err_target_unknown_triple) << Opts.Triple;
-
-  // Set values for symbols, if any.
-  for (auto &S : Opts.SymbolDefs) {
-    auto Pair = StringRef(S).split('=');
-    auto Sym = Pair.first;
-    auto Val = Pair.second;
-    int64_t Value;
-    // We have already error checked this in the driver.
-    Val.getAsInteger(0, Value);
-    Ctx.setSymbolValue(Parser->getStreamer(), Sym, Value);
-  }
-
-  if (!Failed) {
-    Parser->setTargetParser(*TAP.get());
-    Failed = Parser->Run(Opts.NoInitialTextSection);
-  }
-
-  return Failed;
-}
-
-bool ExecuteAssembler(AssemblerInvocation &Opts,
-                             DiagnosticsEngine &Diags) {
-  bool Failed = ExecuteAssemblerImpl(Opts, Diags);
-
-  // Delete output file if there were errors.
-  if (Failed) {
-    if (Opts.OutputPath != "-")
-      sys::fs::remove(Opts.OutputPath);
-    if (!Opts.SplitDwarfOutput.empty() && Opts.SplitDwarfOutput != "-")
-      sys::fs::remove(Opts.SplitDwarfOutput);
-  }
-
-  return Failed;
-}
-
-static void LLVMErrorHandler(void *UserData, const char *Message,
-                             bool GenCrashDiag) {
-  DiagnosticsEngine &Diags = *static_cast<DiagnosticsEngine*>(UserData);
-
-  Diags.Report(diag::err_fe_error_backend) << Message;
-
-  // We cannot recover from llvm errors.
-  sys::Process::Exit(1);
-}
-
-int cc1as_main(ArrayRef<const char *> Argv, const char *Argv0, void *MainAddr) {
-  // Initialize targets and assembly printers/parsers.
-  InitializeAllTargetInfos();
-  InitializeAllTargetMCs();
-  InitializeAllAsmParsers();
-
-  // Construct our diagnostic client.
-  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
-  TextDiagnosticPrinter *DiagClient
-    = new TextDiagnosticPrinter(errs(), &*DiagOpts);
-  DiagClient->setPrefix("clang -cc1as");
-  IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
-  DiagnosticsEngine Diags(DiagID, &*DiagOpts, DiagClient);
-
-  // Set an error handler, so that any LLVM backend diagnostics go through our
-  // error handler.
-  ScopedFatalErrorHandler FatalErrorHandler
-    (LLVMErrorHandler, static_cast<void*>(&Diags));
-
-  // Parse the arguments.
-  AssemblerInvocation Asm;
-  if (!AssemblerInvocation::CreateFromArgs(Asm, Argv, Diags))
-    return 1;
-
-  if (Asm.ShowHelp) {
-    getDriverOptTable().printHelp(
-        llvm::outs(), "clang -cc1as [options] file...",
-        "Clang Integrated Assembler",
-        /*Include=*/driver::options::CC1AsOption, /*Exclude=*/0,
-        /*ShowAllAliases=*/false);
-    return 0;
-  }
-
-  // Honor -version.
-  //
-  // FIXME: Use a better -version message?
-  if (Asm.ShowVersion) {
-    llvm::cl::PrintVersionMessage();
-    return 0;
-  }
-
-  // Honor -mllvm.
-  //
-  // FIXME: Remove this, one day.
-  if (!Asm.LLVMArgs.empty()) {
-    unsigned NumArgs = Asm.LLVMArgs.size();
-    auto Args = std::make_unique<const char*[]>(NumArgs + 2);
-    Args[0] = "clang (LLVM option parsing)";
-    for (unsigned i = 0; i != NumArgs; ++i)
-      Args[i + 1] = Asm.LLVMArgs[i].c_str();
-    Args[NumArgs + 1] = nullptr;
-    llvm::cl::ParseCommandLineOptions(NumArgs + 1, Args.get());
-  }
-
-  // Execute the invocation, unless there were parsing errors.
-  bool Failed = Diags.hasErrorOccurred() || ExecuteAssembler(Asm, Diags);
-
-  // If any timers were active but haven't been destroyed yet, print their
-  // results now.
-  TimerGroup::printAll(errs());
-  TimerGroup::clearAll();
-
-  return !!Failed;
-}

builder/cc1as.h

@@ -1,129 +0,0 @@
-//===-- cc1as.h - Clang Assembler  ----------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This is the entry point to the clang -cc1as functionality, which implements
-// the direct interface to the LLVM MC based assembler.
-//
-//===----------------------------------------------------------------------===//
-
-/// Helper class for representing a single invocation of the assembler.
-struct AssemblerInvocation {
-  /// @name Target Options
-  /// @{
-
-  /// The name of the target triple to assemble for.
-  std::string Triple;
-
-  /// If given, the name of the target CPU to determine which instructions
-  /// are legal.
-  std::string CPU;
-
-  /// The list of target specific features to enable or disable -- this should
-  /// be a list of strings starting with '+' or '-'.
-  std::vector<std::string> Features;
-
-  /// The list of symbol definitions.
-  std::vector<std::string> SymbolDefs;
-
-  /// @}
-  /// @name Language Options
-  /// @{
-
-  std::vector<std::string> IncludePaths;
-  unsigned NoInitialTextSection : 1;
-  unsigned SaveTemporaryLabels : 1;
-  unsigned GenDwarfForAssembly : 1;
-  unsigned RelaxELFRelocations : 1;
-  unsigned Dwarf64 : 1;
-  unsigned DwarfVersion;
-  std::string DwarfDebugFlags;
-  std::string DwarfDebugProducer;
-  std::string DebugCompilationDir;
-  std::map<const std::string, const std::string> DebugPrefixMap;
-  llvm::DebugCompressionType CompressDebugSections =
-      llvm::DebugCompressionType::None;
-  std::string MainFileName;
-  std::string SplitDwarfOutput;
-
-  /// @}
-  /// @name Frontend Options
-  /// @{
-
-  std::string InputFile;
-  std::vector<std::string> LLVMArgs;
-  std::string OutputPath;
-  enum FileType {
-    FT_Asm,  ///< Assembly (.s) output, transliterate mode.
-    FT_Null, ///< No output, for timing purposes.
-    FT_Obj   ///< Object file output.
-  };
-  FileType OutputType;
-  unsigned ShowHelp : 1;
-  unsigned ShowVersion : 1;
-
-  /// @}
-  /// @name Transliterate Options
-  /// @{
-
-  unsigned OutputAsmVariant;
-  unsigned ShowEncoding : 1;
-  unsigned ShowInst : 1;
-
-  /// @}
-  /// @name Assembler Options
-  /// @{
-
-  unsigned RelaxAll : 1;
-  unsigned NoExecStack : 1;
-  unsigned FatalWarnings : 1;
-  unsigned NoWarn : 1;
-  unsigned IncrementalLinkerCompatible : 1;
-  unsigned EmbedBitcode : 1;
-
-  /// Whether to emit DWARF unwind info.
-  EmitDwarfUnwindType EmitDwarfUnwind;
-
-  /// The name of the relocation model to use.
-  std::string RelocationModel;
-
-  /// The ABI targeted by the backend. Specified using -target-abi. Empty
-  /// otherwise.
-  std::string TargetABI;
-
-  /// Darwin target variant triple, the variant of the deployment target
-  /// for which the code is being compiled.
-  llvm::Optional<llvm::Triple> DarwinTargetVariantTriple;
-  /// @}
-
-public:
-  AssemblerInvocation() {
-    Triple = "";
-    NoInitialTextSection = 0;
-    InputFile = "-";
-    OutputPath = "-";
-    OutputType = FT_Asm;
-    OutputAsmVariant = 0;
-    ShowInst = 0;
-    ShowEncoding = 0;
-    RelaxAll = 0;
-    NoExecStack = 0;
-    FatalWarnings = 0;
-    NoWarn = 0;
-    IncrementalLinkerCompatible = 0;
-    Dwarf64 = 0;
-    DwarfVersion = 0;
-    EmbedBitcode = 0;
-    EmitDwarfUnwind = EmitDwarfUnwindType::Default;
-  }
-
-  static bool CreateFromArgs(AssemblerInvocation &Res,
-                             ArrayRef<const char *> Argv,
-                             DiagnosticsEngine &Diags);
-};
-
-bool ExecuteAssembler(AssemblerInvocation &Opts, DiagnosticsEngine &Diags);

builder/cc_test.go

@@ -1,33 +0,0 @@
-package builder
-
-import (
-	"reflect"
-	"testing"
-)
-
-func TestSplitDepFile(t *testing.T) {
-	for i, tc := range []struct {
-		in  string
-		out []string
-	}{
-		{`deps: foo bar`, []string{"foo", "bar"}},
-		{`deps: foo "bar"`, []string{"foo", "bar"}},
-		{`deps: "foo" bar`, []string{"foo", "bar"}},
-		{`deps: "foo bar"`, []string{"foo bar"}},
-		{`deps: "foo bar" `, []string{"foo bar"}},
-		{"deps: foo\nbar", []string{"foo"}},
-		{"deps: foo \\\nbar", []string{"foo", "bar"}},
-		{"deps: foo\\bar \\\nbaz", []string{"foo\\bar", "baz"}},
-		{"deps: foo\\bar \\\r\n baz", []string{"foo\\bar", "baz"}}, // Windows uses CRLF line endings
-	} {
-		out, err := parseDepFile(tc.in)
-		if err != nil {
-			t.Errorf("test #%d failed: %v", i, err)
-			continue
-		}
-		if !reflect.DeepEqual(out, tc.out) {
-			t.Errorf("test #%d failed: expected %#v but got %#v", i, tc.out, out)
-			continue
-		}
-	}
-}

builder/clang.cpp

@@ -1,98 +0,0 @@
-//go:build byollvm
-
-#include <clang/Basic/DiagnosticOptions.h>
-#include <clang/CodeGen/CodeGenAction.h>
-#include <clang/Driver/Compilation.h>
-#include <clang/Driver/Driver.h>
-#include <clang/Frontend/CompilerInstance.h>
-#include <clang/Frontend/CompilerInvocation.h>
-#include <clang/Frontend/FrontendDiagnostic.h>
-#include <clang/Frontend/TextDiagnosticPrinter.h>
-#include <clang/FrontendTool/Utils.h>
-#include <llvm/ADT/IntrusiveRefCntPtr.h>
-#include <llvm/Option/Option.h>
-#include <llvm/Support/Host.h>
-
-using namespace llvm;
-using namespace clang;
-
-#include "cc1as.h"
-
-// This file provides C wrappers for the builtin tools cc1 and cc1as
-// provided by Clang, and calls them as the driver would call them.
-
-extern "C" {
-
-bool tinygo_clang_driver(int argc, char **argv) {
-	std::vector<const char*> args(argv, argv + argc);
-
-	// The compiler invocation needs a DiagnosticsEngine so it can report problems
-	llvm::IntrusiveRefCntPtr<clang::DiagnosticOptions> DiagOpts = new clang::DiagnosticOptions();
-	clang::TextDiagnosticPrinter DiagnosticPrinter(llvm::errs(), &*DiagOpts);
-	clang::DiagnosticsEngine Diags(llvm::IntrusiveRefCntPtr<clang::DiagnosticIDs>(new clang::DiagnosticIDs()), &*DiagOpts, &DiagnosticPrinter, false);
-
-	// Create the clang driver
-	clang::driver::Driver TheDriver(args[0], llvm::sys::getDefaultTargetTriple(), Diags);
-
-	// Create the set of actions to perform
-	std::unique_ptr<clang::driver::Compilation> C(TheDriver.BuildCompilation(args));
-	if (!C) {
-		return false;
-	}
-	const clang::driver::JobList &Jobs = C->getJobs();
-
-	// There may be more than one job, for example for .S files
-	// (preprocessor + assembler).
-	for (auto Cmd : Jobs) {
-		// Select the tool: cc1 or cc1as.
-		const llvm::opt::ArgStringList &CCArgs = Cmd.getArguments();
-
-		if (strcmp(*CCArgs.data(), "-cc1") == 0) {
-			// This is the C frontend.
-			// Initialize a compiler invocation object from the clang (-cc1) arguments.
-			std::unique_ptr<clang::CompilerInstance> Clang(new clang::CompilerInstance());
-			bool success = clang::CompilerInvocation::CreateFromArgs(
-					Clang->getInvocation(),
-					CCArgs,
-					Diags);
-			if (!success) {
-				return false;
-			}
-
-			// Create the actual diagnostics engine.
-			Clang->createDiagnostics();
-			if (!Clang->hasDiagnostics()) {
-				return false;
-			}
-
-			// Execute the frontend actions.
-			success = ExecuteCompilerInvocation(Clang.get());
-			if (!success) {
-				return false;
-			}
-
-		} else if (strcmp(*CCArgs.data(), "-cc1as") == 0) {
-			// This is the assembler frontend. Parse the arguments.
-			AssemblerInvocation Asm;
-			ArrayRef<const char *> Argv = llvm::ArrayRef<const char*>(CCArgs);
-			if (!AssemblerInvocation::CreateFromArgs(Asm, Argv.slice(1), Diags))
-				return false;
-
-			// Execute the invocation, unless there were parsing errors.
-			bool failed = Diags.hasErrorOccurred() || ExecuteAssembler(Asm, Diags);
-			if (failed) {
-				return false;
-			}
-
-		} else {
-			// Unknown tool, print the tool and exit.
-			fprintf(stderr, "unknown tool: %s\n", *CCArgs.data());
-			return false;
-		}
-	}
-
-	// Commands executed successfully.
-	return true;
-}
-
-} // extern "C"

builder/commands.go

@@ -1,89 +0,0 @@
-package builder
-
-import (
-	"errors"
-	"fmt"
-	"os"
-	"os/exec"
-	"runtime"
-	"strings"
-
-	"tinygo.org/x/go-llvm"
-)
-
-// Commands lists command alternatives for various operating systems. These
-// commands may have a slightly different name across operating systems and
-// distributions or may not even exist in $PATH, in which case absolute paths
-// may be used.
-var commands = map[string][]string{}
-
-func init() {
-	llvmMajor := strings.Split(llvm.Version, ".")[0]
-	commands["clang"] = []string{"clang-" + llvmMajor}
-	commands["ld.lld"] = []string{"ld.lld-" + llvmMajor, "ld.lld"}
-	commands["wasm-ld"] = []string{"wasm-ld-" + llvmMajor, "wasm-ld"}
-	commands["lldb"] = []string{"lldb-" + llvmMajor, "lldb"}
-	// Add the path to a Homebrew-installed LLVM for ease of use (no need to
-	// manually set $PATH).
-	if runtime.GOOS == "darwin" {
-		var prefix string
-		switch runtime.GOARCH {
-		case "amd64":
-			prefix = "/usr/local/opt/llvm@" + llvmMajor + "/bin/"
-		case "arm64":
-			prefix = "/opt/homebrew/opt/llvm@" + llvmMajor + "/bin/"
-		default:
-			// unknown GOARCH
-			panic(fmt.Sprintf("unknown GOARCH: %s on darwin", runtime.GOARCH))
-		}
-		commands["clang"] = append(commands["clang"], prefix+"clang-"+llvmMajor)
-		commands["ld.lld"] = append(commands["ld.lld"], prefix+"ld.lld")
-		commands["wasm-ld"] = append(commands["wasm-ld"], prefix+"wasm-ld")
-		commands["lldb"] = append(commands["lldb"], prefix+"lldb")
-	}
-	// Add the path for when LLVM was installed with the installer from
-	// llvm.org, which by default doesn't add LLVM to the $PATH environment
-	// variable.
-	if runtime.GOOS == "windows" {
-		commands["clang"] = append(commands["clang"], "clang", "C:\\Program Files\\LLVM\\bin\\clang.exe")
-		commands["ld.lld"] = append(commands["ld.lld"], "lld", "C:\\Program Files\\LLVM\\bin\\lld.exe")
-		commands["wasm-ld"] = append(commands["wasm-ld"], "C:\\Program Files\\LLVM\\bin\\wasm-ld.exe")
-		commands["lldb"] = append(commands["lldb"], "C:\\Program Files\\LLVM\\bin\\lldb.exe")
-	}
-	// Add the path to LLVM installed from ports.
-	if runtime.GOOS == "freebsd" {
-		prefix := "/usr/local/llvm" + llvmMajor + "/bin/"
-		commands["clang"] = append(commands["clang"], prefix+"clang-"+llvmMajor)
-		commands["ld.lld"] = append(commands["ld.lld"], prefix+"ld.lld")
-		commands["wasm-ld"] = append(commands["wasm-ld"], prefix+"wasm-ld")
-		commands["lldb"] = append(commands["lldb"], prefix+"lldb")
-	}
-}
-
-// LookupCommand looks up the executable name for a given LLVM tool such as
-// clang or wasm-ld. It returns the (relative) command that can be used to
-// invoke the tool or an error if it could not be found.
-func LookupCommand(name string) (string, error) {
-	for _, cmdName := range commands[name] {
-		_, err := exec.LookPath(cmdName)
-		if err != nil {
-			if errors.Unwrap(err) == exec.ErrNotFound {
-				continue
-			}
-			return cmdName, err
-		}
-		return cmdName, nil
-	}
-	return "", errors.New("none of these commands were found in your $PATH: " + strings.Join(commands[name], " "))
-}
-
-func execCommand(name string, args ...string) error {
-	name, err := LookupCommand(name)
-	if err != nil {
-		return err
-	}
-	cmd := exec.Command(name, args...)
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	return cmd.Run()
-}

builder/config.go

@@ -1,49 +0,0 @@
-package builder
-
-import (
-	"errors"
-	"fmt"
-
-	"github.com/tinygo-org/tinygo/compileopts"
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-// NewConfig builds a new Config object from a set of compiler options. It also
-// loads some information from the environment while doing that. For example, it
-// uses the currently active GOPATH (from the goenv package) to determine the Go
-// version to use.
-func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
-	spec, err := compileopts.LoadTarget(options)
-	if err != nil {
-		return nil, err
-	}
-
-	if options.OpenOCDCommands != nil {
-		// Override the OpenOCDCommands from the target spec if specified on
-		// the command-line
-		spec.OpenOCDCommands = options.OpenOCDCommands
-	}
-
-	goroot := goenv.Get("GOROOT")
-	if goroot == "" {
-		return nil, errors.New("cannot locate $GOROOT, please set it manually")
-	}
-
-	major, minor, err := goenv.GetGorootVersion(goroot)
-	if err != nil {
-		return nil, fmt.Errorf("could not read version from GOROOT (%v): %v", goroot, err)
-	}
-	if major != 1 || minor < 18 || minor > 20 {
-		return nil, fmt.Errorf("requires go version 1.18 through 1.20, got go%d.%d", major, minor)
-	}
-
-	clangHeaderPath := getClangHeaderPath(goenv.Get("TINYGOROOT"))
-
-	return &compileopts.Config{
-		Options:        options,
-		Target:         spec,
-		GoMinorVersion: minor,
-		ClangHeaders:   clangHeaderPath,
-		TestConfig:     options.TestConfig,
-	}, nil
-}

builder/darwin-libsystem.go

@@ -1,58 +0,0 @@
-package builder
-
-import (
-	"path/filepath"
-	"strings"
-
-	"github.com/tinygo-org/tinygo/compileopts"
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-// Create a job that builds a Darwin libSystem.dylib stub library. This library
-// contains all the symbols needed so that we can link against it, but it
-// doesn't contain any real symbol implementations.
-func makeDarwinLibSystemJob(config *compileopts.Config, tmpdir string) *compileJob {
-	return &compileJob{
-		description: "compile Darwin libSystem.dylib",
-		run: func(job *compileJob) (err error) {
-			arch := strings.Split(config.Triple(), "-")[0]
-			job.result = filepath.Join(tmpdir, "libSystem.dylib")
-			objpath := filepath.Join(tmpdir, "libSystem.o")
-			inpath := filepath.Join(goenv.Get("TINYGOROOT"), "lib/macos-minimal-sdk/src", arch, "libSystem.s")
-
-			// Compile assembly file to object file.
-			flags := []string{
-				"-nostdlib",
-				"--target=" + config.Triple(),
-				"-c",
-				"-o", objpath,
-				inpath,
-			}
-			if config.Options.PrintCommands != nil {
-				config.Options.PrintCommands("clang", flags...)
-			}
-			err = runCCompiler(flags...)
-			if err != nil {
-				return err
-			}
-
-			// Link object file to dynamic library.
-			platformVersion := strings.TrimPrefix(strings.Split(config.Triple(), "-")[2], "macosx")
-			flags = []string{
-				"-flavor", "darwin",
-				"-demangle",
-				"-dynamic",
-				"-dylib",
-				"-arch", arch,
-				"-platform_version", "macos", platformVersion, platformVersion,
-				"-install_name", "/usr/lib/libSystem.B.dylib",
-				"-o", job.result,
-				objpath,
-			}
-			if config.Options.PrintCommands != nil {
-				config.Options.PrintCommands("ld.lld", flags...)
-			}
-			return link("ld.lld", flags...)
-		},
-	}
-}

builder/elfpatch.go

@@ -1,57 +0,0 @@
-package builder
-
-import (
-	"debug/elf"
-	"fmt"
-	"os"
-)
-
-func getElfSectionData(executable string, sectionName string) ([]byte, elf.FileHeader, error) {
-	elfFile, err := elf.Open(executable)
-	if err != nil {
-		return nil, elf.FileHeader{}, err
-	}
-	defer elfFile.Close()
-
-	section := elfFile.Section(sectionName)
-	if section == nil {
-		return nil, elf.FileHeader{}, fmt.Errorf("could not find %s section", sectionName)
-	}
-
-	data, err := section.Data()
-
-	return data, elfFile.FileHeader, err
-}
-
-func replaceElfSection(executable string, sectionName string, data []byte) error {
-	fp, err := os.OpenFile(executable, os.O_RDWR, 0)
-	if err != nil {
-		return err
-	}
-	defer fp.Close()
-
-	elfFile, err := elf.Open(executable)
-	if err != nil {
-		return err
-	}
-	defer elfFile.Close()
-
-	section := elfFile.Section(sectionName)
-	if section == nil {
-		return fmt.Errorf("could not find %s section", sectionName)
-	}
-
-	// Implicitly check for compressed sections
-	if section.Size != section.FileSize {
-		return fmt.Errorf("expected section %s to have identical size and file size, got %d and %d", sectionName, section.Size, section.FileSize)
-	}
-
-	// Only permit complete replacement of section
-	if section.Size != uint64(len(data)) {
-		return fmt.Errorf("expected section %s to have size %d, was actually %d", sectionName, len(data), section.Size)
-	}
-
-	// Write the replacement section data
-	_, err = fp.WriteAt(data, int64(section.Offset))
-	return err
-}

builder/env.go

@@ -1,105 +0,0 @@
-package builder
-
-import (
-	"errors"
-	"io/fs"
-	"io/ioutil"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"sort"
-	"strings"
-
-	"tinygo.org/x/go-llvm"
-)
-
-// getClangHeaderPath returns the path to the built-in Clang headers. It tries
-// multiple locations, which should make it find the directory when installed in
-// various ways.
-func getClangHeaderPath(TINYGOROOT string) string {
-	// Check whether we're running from the source directory.
-	path := filepath.Join(TINYGOROOT, "llvm-project", "clang", "lib", "Headers")
-	if _, err := os.Stat(path); !errors.Is(err, fs.ErrNotExist) {
-		return path
-	}
-
-	// Check whether we're running from the installation directory.
-	path = filepath.Join(TINYGOROOT, "lib", "clang", "include")
-	if _, err := os.Stat(path); !errors.Is(err, fs.ErrNotExist) {
-		return path
-	}
-
-	// It looks like we are built with a system-installed LLVM. Do a last
-	// attempt: try to use Clang headers relative to the clang binary.
-	llvmMajor := strings.Split(llvm.Version, ".")[0]
-	for _, cmdName := range commands["clang"] {
-		binpath, err := exec.LookPath(cmdName)
-		if err == nil {
-			// This should be the command that will also be used by
-			// execCommand. To avoid inconsistencies, make sure we use the
-			// headers relative to this command.
-			binpath, err = filepath.EvalSymlinks(binpath)
-			if err != nil {
-				// Unexpected.
-				return ""
-			}
-			// Example executable:
-			//     /usr/lib/llvm-9/bin/clang
-			// Example include path:
-			//     /usr/lib/llvm-9/lib64/clang/9.0.1/include/
-			llvmRoot := filepath.Dir(filepath.Dir(binpath))
-			clangVersionRoot := filepath.Join(llvmRoot, "lib64", "clang")
-			dirs64, err64 := ioutil.ReadDir(clangVersionRoot)
-			// Example include path:
-			//     /usr/lib/llvm-9/lib/clang/9.0.1/include/
-			clangVersionRoot = filepath.Join(llvmRoot, "lib", "clang")
-			dirs32, err32 := ioutil.ReadDir(clangVersionRoot)
-			if err64 != nil && err32 != nil {
-				// Unexpected.
-				continue
-			}
-			dirnames := make([]string, len(dirs64)+len(dirs32))
-			dirCount := 0
-			for _, d := range dirs32 {
-				name := d.Name()
-				if name == llvmMajor || strings.HasPrefix(name, llvmMajor+".") {
-					dirnames[dirCount] = filepath.Join(llvmRoot, "lib", "clang", name)
-					dirCount++
-				}
-			}
-			for _, d := range dirs64 {
-				name := d.Name()
-				if name == llvmMajor || strings.HasPrefix(name, llvmMajor+".") {
-					dirnames[dirCount] = filepath.Join(llvmRoot, "lib64", "clang", name)
-					dirCount++
-				}
-			}
-			sort.Strings(dirnames)
-			// Check for the highest version first.
-			for i := dirCount - 1; i >= 0; i-- {
-				path := filepath.Join(dirnames[i], "include")
-				_, err := os.Stat(filepath.Join(path, "stdint.h"))
-				if err == nil {
-					return path
-				}
-			}
-		}
-	}
-
-	// On Arch Linux, the clang executable is stored in /usr/bin rather than being symlinked from there.
-	// Search directly in /usr/lib for clang.
-	if matches, err := filepath.Glob("/usr/lib/clang/" + llvmMajor + ".*.*"); err == nil {
-		// Check for the highest version first.
-		sort.Strings(matches)
-		for i := len(matches) - 1; i >= 0; i-- {
-			path := filepath.Join(matches[i], "include")
-			_, err := os.Stat(filepath.Join(path, "stdint.h"))
-			if err == nil {
-				return path
-			}
-		}
-	}
-
-	// Could not find it.
-	return ""
-}

builder/error.go

@@ -1,39 +0,0 @@
-package builder
-
-// MultiError is a list of multiple errors (actually: diagnostics) returned
-// during LLVM IR generation.
-type MultiError struct {
-	Errs []error
-}
-
-func (e *MultiError) Error() string {
-	// Return the first error, to conform to the error interface. Clients should
-	// really do a type-assertion on *MultiError.
-	return e.Errs[0].Error()
-}
-
-// newMultiError returns a *MultiError if there is more than one error, or
-// returns that error directly when there is only one. Passing an empty slice
-// will lead to a panic.
-func newMultiError(errs []error) error {
-	switch len(errs) {
-	case 0:
-		panic("attempted to create empty MultiError")
-	case 1:
-		return errs[0]
-	default:
-		return &MultiError{errs}
-	}
-}
-
-// commandError is an error type to wrap os/exec.Command errors. This provides
-// some more information regarding what went wrong while running a command.
-type commandError struct {
-	Msg  string
-	File string
-	Err  error
-}
-
-func (e *commandError) Error() string {
-	return e.Msg + " " + e.File + ": " + e.Err.Error()
-}

builder/esp.go

@@ -1,193 +0,0 @@
-package builder
-
-// This file implements support for writing ESP image files. These image files
-// are read by the ROM bootloader so have to be in a particular format.
-//
-// In the future, it may be necessary to implement support for other image
-// formats, such as the ESP8266 image formats (again, used by the ROM bootloader
-// to load the firmware).
-
-import (
-	"bytes"
-	"crypto/sha256"
-	"debug/elf"
-	"encoding/binary"
-	"fmt"
-	"os"
-	"sort"
-	"strings"
-)
-
-type espImageSegment struct {
-	addr uint32
-	data []byte
-}
-
-// makeESPFirmare converts an input ELF file to an image file for an ESP32 or
-// ESP8266 chip. This is a special purpose image format just for the ESP chip
-// family, and is parsed by the on-chip mask ROM bootloader.
-//
-// The following documentation has been used:
-// https://github.com/espressif/esptool/wiki/Firmware-Image-Format
-// https://github.com/espressif/esp-idf/blob/8fbb63c2a701c22ccf4ce249f43aded73e134a34/components/bootloader_support/include/esp_image_format.h#L58
-// https://github.com/espressif/esptool/blob/master/esptool.py
-func makeESPFirmareImage(infile, outfile, format string) error {
-	inf, err := elf.Open(infile)
-	if err != nil {
-		return err
-	}
-	defer inf.Close()
-
-	// Load all segments to be written to the image. These are actually ELF
-	// sections, not true ELF segments (similar to how esptool does it).
-	var segments []*espImageSegment
-	for _, section := range inf.Sections {
-		if section.Type != elf.SHT_PROGBITS || section.Size == 0 || section.Flags&elf.SHF_ALLOC == 0 {
-			continue
-		}
-		data, err := section.Data()
-		if err != nil {
-			return fmt.Errorf("failed to read section data: %w", err)
-		}
-		for len(data)%4 != 0 {
-			// Align segment to 4 bytes.
-			data = append(data, 0)
-		}
-		if uint64(uint32(section.Addr)) != section.Addr {
-			return fmt.Errorf("section address too big: 0x%x", section.Addr)
-		}
-		segments = append(segments, &espImageSegment{
-			addr: uint32(section.Addr),
-			data: data,
-		})
-	}
-
-	// Sort the segments by address. This is what esptool does too.
-	sort.SliceStable(segments, func(i, j int) bool { return segments[i].addr < segments[j].addr })
-
-	// Calculate checksum over the segment data. This is used in the image
-	// footer.
-	checksum := uint8(0xef)
-	for _, segment := range segments {
-		for _, b := range segment.data {
-			checksum ^= b
-		}
-	}
-
-	// Write first to an in-memory buffer, primarily so that we can easily
-	// calculate a hash over the entire image.
-	// An added benefit is that we don't need to check for errors all the time.
-	outf := &bytes.Buffer{}
-
-	// Separate esp32 and esp32-img. The -img suffix indicates we should make an
-	// image, not just a binary to be flashed at 0x1000 for example.
-	chip := format
-	makeImage := false
-	if strings.HasSuffix(format, "-img") {
-		makeImage = true
-		chip = format[:len(format)-len("-img")]
-	}
-
-	if makeImage {
-		// The bootloader starts at 0x1000, or 4096.
-		// TinyGo doesn't use a separate bootloader and runs the entire
-		// application in the bootloader location.
-		outf.Write(make([]byte, 4096))
-	}
-
-	// Chip IDs. Source:
-	// https://github.com/espressif/esp-idf/blob/v4.3/components/bootloader_support/include/esp_app_format.h#L22
-	chip_id := map[string]uint16{
-		"esp32":   0x0000,
-		"esp32c3": 0x0005,
-	}[chip]
-
-	// Image header.
-	switch chip {
-	case "esp32", "esp32c3":
-		// Header format:
-		// https://github.com/espressif/esp-idf/blob/v4.3/components/bootloader_support/include/esp_app_format.h#L71
-		// Note: not adding a SHA256 hash as the binary is modified by
-		// esptool.py while flashing and therefore the hash won't be valid
-		// anymore.
-		binary.Write(outf, binary.LittleEndian, struct {
-			magic          uint8
-			segment_count  uint8
-			spi_mode       uint8
-			spi_speed_size uint8
-			entry_addr     uint32
-			wp_pin         uint8
-			spi_pin_drv    [3]uint8
-			chip_id        uint16
-			min_chip_rev   uint8
-			reserved       [8]uint8
-			hash_appended  bool
-		}{
-			magic:          0xE9,
-			segment_count:  byte(len(segments)),
-			spi_mode:       2,    // ESP_IMAGE_SPI_MODE_DIO
-			spi_speed_size: 0x1f, // ESP_IMAGE_SPI_SPEED_80M, ESP_IMAGE_FLASH_SIZE_2MB
-			entry_addr:     uint32(inf.Entry),
-			wp_pin:         0xEE, // disable WP pin
-			chip_id:        chip_id,
-			hash_appended:  true, // add a SHA256 hash
-		})
-	case "esp8266":
-		// Header format:
-		// https://github.com/espressif/esptool/wiki/Firmware-Image-Format
-		// Basically a truncated version of the ESP32 header.
-		binary.Write(outf, binary.LittleEndian, struct {
-			magic          uint8
-			segment_count  uint8
-			spi_mode       uint8
-			spi_speed_size uint8
-			entry_addr     uint32
-		}{
-			magic:          0xE9,
-			segment_count:  byte(len(segments)),
-			spi_mode:       0,    // irrelevant, replaced by esptool when flashing
-			spi_speed_size: 0x20, // spi_speed, spi_size: replaced by esptool when flashing
-			entry_addr:     uint32(inf.Entry),
-		})
-	default:
-		return fmt.Errorf("builder: unknown binary format %#v, expected esp32 or esp8266", format)
-	}
-
-	// Write all segments to the image.
-	// https://github.com/espressif/esptool/wiki/Firmware-Image-Format#segment
-	for _, segment := range segments {
-		binary.Write(outf, binary.LittleEndian, struct {
-			addr   uint32
-			length uint32
-		}{
-			addr:   segment.addr,
-			length: uint32(len(segment.data)),
-		})
-		outf.Write(segment.data)
-	}
-
-	// Footer, including checksum.
-	// The entire image size must be a multiple of 16, so pad the image to one
-	// byte less than that before writing the checksum.
-	outf.Write(make([]byte, 15-outf.Len()%16))
-	outf.WriteByte(checksum)
-
-	if chip != "esp8266" {
-		// SHA256 hash (to protect against image corruption, not for security).
-		hash := sha256.Sum256(outf.Bytes())
-		outf.Write(hash[:])
-	}
-
-	// QEMU (or more precisely, qemu-system-xtensa from Espressif) expects the
-	// image to be a certain size.
-	if makeImage {
-		// Use a default image size of 4MB.
-		grow := 4096*1024 - outf.Len()
-		if grow > 0 {
-			outf.Write(make([]byte, grow))
-		}
-	}
-
-	// Write the image to the output file.
-	return os.WriteFile(outfile, outf.Bytes(), 0666)
-}

builder/jobs.go

@@ -1,229 +0,0 @@
-package builder
-
-// This file implements a job runner for the compiler, which runs jobs in
-// parallel while taking care of dependencies.
-
-import (
-	"container/heap"
-	"errors"
-	"fmt"
-	"runtime"
-	"sort"
-	"strings"
-	"time"
-)
-
-// Set to true to enable logging in the job runner. This may help to debug
-// concurrency or performance issues.
-const jobRunnerDebug = false
-
-type jobState uint8
-
-const (
-	jobStateQueued   jobState = iota // not yet running
-	jobStateRunning                  // running
-	jobStateFinished                 // finished running
-)
-
-// compileJob is a single compiler job, comparable to a single Makefile target.
-// It is used to orchestrate various compiler tasks that can be run in parallel
-// but that have dependencies and thus have limitations in how they can be run.
-type compileJob struct {
-	description  string // description, only used for logging
-	dependencies []*compileJob
-	result       string // result (path)
-	run          func(*compileJob) (err error)
-	err          error         // error if finished
-	duration     time.Duration // how long it took to run this job (only set after finishing)
-}
-
-// dummyCompileJob returns a new *compileJob that produces an output without
-// doing anything. This can be useful where a *compileJob producing an output is
-// expected but nothing needs to be done, for example for a load from a cache.
-func dummyCompileJob(result string) *compileJob {
-	return &compileJob{
-		description: "<dummy>",
-		result:      result,
-	}
-}
-
-// runJobs runs the indicated job and all its dependencies. For every job, all
-// the dependencies are run first. It returns the error of the first job that
-// fails.
-// It runs all jobs in the order of the dependencies slice, depth-first.
-// Therefore, if some jobs are preferred to run before others, they should be
-// ordered as such in the job dependencies.
-func runJobs(job *compileJob, sema chan struct{}) error {
-	if sema == nil {
-		// Have a default, if the semaphore isn't set. This is useful for
-		// tests.
-		sema = make(chan struct{}, runtime.NumCPU())
-	}
-	if cap(sema) == 0 {
-		return errors.New("cannot 0 jobs at a time")
-	}
-
-	// Create a slice of jobs to run, where all dependencies are run in order.
-	jobs := []*compileJob{}
-	addedJobs := map[*compileJob]struct{}{}
-	var addJobs func(*compileJob)
-	addJobs = func(job *compileJob) {
-		if _, ok := addedJobs[job]; ok {
-			return
-		}
-		for _, dep := range job.dependencies {
-			addJobs(dep)
-		}
-		jobs = append(jobs, job)
-		addedJobs[job] = struct{}{}
-	}
-	addJobs(job)
-
-	waiting := make(map[*compileJob]map[*compileJob]struct{}, len(jobs))
-	dependents := make(map[*compileJob][]*compileJob, len(jobs))
-	jidx := make(map[*compileJob]int)
-	var ready intHeap
-	for i, job := range jobs {
-		jidx[job] = i
-		if len(job.dependencies) == 0 {
-			// This job is ready to run.
-			ready.Push(i)
-			continue
-		}
-
-		// Construct a map for dependencies which the job is currently waiting on.
-		waitDeps := make(map[*compileJob]struct{})
-		waiting[job] = waitDeps
-
-		// Add the job to the dependents list of each dependency.
-		for _, dep := range job.dependencies {
-			dependents[dep] = append(dependents[dep], job)
-			waitDeps[dep] = struct{}{}
-		}
-	}
-
-	// Create a channel to accept notifications of completion.
-	doneChan := make(chan *compileJob)
-
-	// Send each job in the jobs slice to a worker, taking care of job
-	// dependencies.
-	numRunningJobs := 0
-	var totalTime time.Duration
-	start := time.Now()
-	for len(ready.IntSlice) > 0 || numRunningJobs != 0 {
-		var completed *compileJob
-		if len(ready.IntSlice) > 0 {
-			select {
-			case sema <- struct{}{}:
-				// Start a job.
-				job := jobs[heap.Pop(&ready).(int)]
-				if jobRunnerDebug {
-					fmt.Println("## start:   ", job.description)
-				}
-				go runJob(job, doneChan)
-				numRunningJobs++
-				continue
-
-			case completed = <-doneChan:
-				// A job completed.
-			}
-		} else {
-			// Wait for a job to complete.
-			completed = <-doneChan
-		}
-		numRunningJobs--
-		<-sema
-		if jobRunnerDebug {
-			fmt.Println("## finished:", job.description, "(time "+job.duration.String()+")")
-		}
-		if completed.err != nil {
-			// Wait for any current jobs to finish.
-			for numRunningJobs != 0 {
-				<-doneChan
-				numRunningJobs--
-			}
-
-			// The build failed.
-			return completed.err
-		}
-
-		// Update total run time.
-		totalTime += completed.duration
-
-		// Update dependent jobs.
-		for _, j := range dependents[completed] {
-			wait := waiting[j]
-			delete(wait, completed)
-			if len(wait) == 0 {
-				// This job is now ready to run.
-				ready.Push(jidx[j])
-				delete(waiting, j)
-			}
-		}
-	}
-	if len(waiting) != 0 {
-		// There is a dependency cycle preventing some jobs from running.
-		return errDependencyCycle{waiting}
-	}
-
-	// Some statistics, if debugging.
-	if jobRunnerDebug {
-		// Total duration of running all jobs.
-		duration := time.Since(start)
-		fmt.Println("## total:   ", duration)
-
-		// The individual time of each job combined. On a multicore system, this
-		// should be lower than the total above.
-		fmt.Println("## job sum: ", totalTime)
-	}
-
-	return nil
-}
-
-type errDependencyCycle struct {
-	waiting map[*compileJob]map[*compileJob]struct{}
-}
-
-func (err errDependencyCycle) Error() string {
-	waits := make([]string, 0, len(err.waiting))
-	for j, wait := range err.waiting {
-		deps := make([]string, 0, len(wait))
-		for dep := range wait {
-			deps = append(deps, dep.description)
-		}
-		sort.Strings(deps)
-
-		waits = append(waits, fmt.Sprintf("\t%s is waiting for [%s]",
-			j.description, strings.Join(deps, ", "),
-		))
-	}
-	sort.Strings(waits)
-	return "deadlock:\n" + strings.Join(waits, "\n")
-}
-
-type intHeap struct {
-	sort.IntSlice
-}
-
-func (h *intHeap) Push(x interface{}) {
-	h.IntSlice = append(h.IntSlice, x.(int))
-}
-
-func (h *intHeap) Pop() interface{} {
-	x := h.IntSlice[len(h.IntSlice)-1]
-	h.IntSlice = h.IntSlice[:len(h.IntSlice)-1]
-	return x
-}
-
-// runJob runs a compile job and notifies doneChan of completion.
-func runJob(job *compileJob, doneChan chan *compileJob) {
-	start := time.Now()
-	if job.run != nil {
-		err := job.run(job)
-		if err != nil {
-			job.err = err
-		}
-	}
-	job.duration = time.Since(start)
-	doneChan <- job
-}

builder/library.go

@@ -1,290 +0,0 @@
-package builder
-
-import (
-	"errors"
-	"io/fs"
-	"os"
-	"path/filepath"
-	"runtime"
-	"strings"
-	"sync"
-
-	"github.com/tinygo-org/tinygo/compileopts"
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-// Library is a container for information about a single C library, such as a
-// compiler runtime or libc.
-type Library struct {
-	// The library name, such as compiler-rt or picolibc.
-	name string
-
-	// makeHeaders creates a header include dir for the library
-	makeHeaders func(target, includeDir string) error
-
-	// cflags returns the C flags specific to this library
-	cflags func(target, headerPath string) []string
-
-	// The source directory.
-	sourceDir func() string
-
-	// The source files, relative to sourceDir.
-	librarySources func(target string) ([]string, error)
-
-	// The source code for the crt1.o file, relative to sourceDir.
-	crt1Source string
-}
-
-// Load the library archive, possibly generating and caching it if needed.
-// The resulting directory may be stored in the provided tmpdir, which is
-// expected to be removed after the Load call.
-func (l *Library) Load(config *compileopts.Config, tmpdir string) (dir string, err error) {
-	job, unlock, err := l.load(config, tmpdir)
-	if err != nil {
-		return "", err
-	}
-	defer unlock()
-	err = runJobs(job, config.Options.Semaphore)
-	return filepath.Dir(job.result), err
-}
-
-// load returns a compile job to build this library file for the given target
-// and CPU. It may return a dummy compileJob if the library build is already
-// cached. The path is stored as job.result but is only valid after the job has
-// been run.
-// The provided tmpdir will be used to store intermediary files and possibly the
-// output archive file, it is expected to be removed after use.
-// As a side effect, this call creates the library header files if they didn't
-// exist yet.
-func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJob, abortLock func(), err error) {
-	outdir, precompiled := config.LibcPath(l.name)
-	archiveFilePath := filepath.Join(outdir, "lib.a")
-	if precompiled {
-		// Found a precompiled library for this OS/architecture. Return the path
-		// directly.
-		return dummyCompileJob(archiveFilePath), func() {}, nil
-	}
-
-	// Create a lock on the output (if supported).
-	// This is a bit messy, but avoids a deadlock because it is ordered consistently with other library loads within a build.
-	outname := filepath.Base(outdir)
-	unlock := lock(filepath.Join(goenv.Get("GOCACHE"), outname+".lock"))
-	var ok bool
-	defer func() {
-		if !ok {
-			unlock()
-		}
-	}()
-
-	// Try to fetch this library from the cache.
-	if _, err := os.Stat(archiveFilePath); err == nil {
-		return dummyCompileJob(archiveFilePath), func() {}, nil
-	}
-	// Cache miss, build it now.
-
-	// Create the destination directory where the components of this library
-	// (lib.a file, include directory) are placed.
-	err = os.MkdirAll(filepath.Join(goenv.Get("GOCACHE"), outname), 0o777)
-	if err != nil {
-		// Could not create directory (and not because it already exists).
-		return nil, nil, err
-	}
-
-	// Make headers if needed.
-	headerPath := filepath.Join(outdir, "include")
-	target := config.Triple()
-	if l.makeHeaders != nil {
-		if _, err = os.Stat(headerPath); err != nil {
-			temporaryHeaderPath, err := os.MkdirTemp(outdir, "include.tmp*")
-			if err != nil {
-				return nil, nil, err
-			}
-			defer os.RemoveAll(temporaryHeaderPath)
-			err = l.makeHeaders(target, temporaryHeaderPath)
-			if err != nil {
-				return nil, nil, err
-			}
-			err = os.Chmod(temporaryHeaderPath, 0o755) // TempDir uses 0o700 by default
-			if err != nil {
-				return nil, nil, err
-			}
-			err = os.Rename(temporaryHeaderPath, headerPath)
-			if err != nil {
-				switch {
-				case errors.Is(err, fs.ErrExist):
-					// Another invocation of TinyGo also seems to have already created the headers.
-
-				case runtime.GOOS == "windows" && errors.Is(err, fs.ErrPermission):
-					// On Windows, a rename with a destination directory that already
-					// exists does not result in an IsExist error, but rather in an
-					// access denied error. To be sure, check for this case by checking
-					// whether the target directory exists.
-					if _, err := os.Stat(headerPath); err == nil {
-						break
-					}
-					fallthrough
-
-				default:
-					return nil, nil, err
-				}
-			}
-		}
-	}
-
-	remapDir := filepath.Join(os.TempDir(), "tinygo-"+l.name)
-	dir := filepath.Join(tmpdir, "build-lib-"+l.name)
-	err = os.Mkdir(dir, 0777)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	// Precalculate the flags to the compiler invocation.
-	// Note: -fdebug-prefix-map is necessary to make the output archive
-	// reproducible. Otherwise the temporary directory is stored in the archive
-	// itself, which varies each run.
-	args := append(l.cflags(target, headerPath), "-c", "-Oz", "-gdwarf-4", "-ffunction-sections", "-fdata-sections", "-Wno-macro-redefined", "--target="+target, "-fdebug-prefix-map="+dir+"="+remapDir)
-	cpu := config.CPU()
-	if cpu != "" {
-		// X86 has deprecated the -mcpu flag, so we need to use -march instead.
-		// However, ARM has not done this.
-		if strings.HasPrefix(target, "i386") || strings.HasPrefix(target, "x86_64") {
-			args = append(args, "-march="+cpu)
-		} else if strings.HasPrefix(target, "avr") {
-			args = append(args, "-mmcu="+cpu)
-		} else {
-			args = append(args, "-mcpu="+cpu)
-		}
-	}
-	if config.ABI() != "" {
-		args = append(args, "-mabi="+config.ABI())
-	}
-	if strings.HasPrefix(target, "arm") || strings.HasPrefix(target, "thumb") {
-		if strings.Split(target, "-")[2] == "linux" {
-			args = append(args, "-fno-unwind-tables", "-fno-asynchronous-unwind-tables")
-		} else {
-			args = append(args, "-fshort-enums", "-fomit-frame-pointer", "-mfloat-abi=soft", "-fno-unwind-tables", "-fno-asynchronous-unwind-tables")
-		}
-	}
-	if strings.HasPrefix(target, "avr") {
-		// AVR defaults to C float and double both being 32-bit. This deviates
-		// from what most code (and certainly compiler-rt) expects. So we need
-		// to force the compiler to use 64-bit floating point numbers for
-		// double.
-		args = append(args, "-mdouble=64")
-	}
-	if strings.HasPrefix(target, "riscv32-") {
-		args = append(args, "-march=rv32imac", "-fforce-enable-int128")
-	}
-	if strings.HasPrefix(target, "riscv64-") {
-		args = append(args, "-march=rv64gc")
-	}
-	if strings.HasPrefix(target, "xtensa") {
-		// Hack to work around an issue in the Xtensa port:
-		// https://github.com/espressif/llvm-project/issues/52
-		// Hopefully this will be fixed soon (LLVM 14).
-		args = append(args, "-D__ELF__")
-	}
-
-	var once sync.Once
-
-	// Create job to put all the object files in a single archive. This archive
-	// file is the (static) library file.
-	var objs []string
-	job = &compileJob{
-		description: "ar " + l.name + "/lib.a",
-		result:      filepath.Join(goenv.Get("GOCACHE"), outname, "lib.a"),
-		run: func(*compileJob) error {
-			defer once.Do(unlock)
-
-			// Create an archive of all object files.
-			f, err := os.CreateTemp(outdir, "libc.a.tmp*")
-			if err != nil {
-				return err
-			}
-			err = makeArchive(f, objs)
-			if err != nil {
-				return err
-			}
-			err = f.Close()
-			if err != nil {
-				return err
-			}
-			err = os.Chmod(f.Name(), 0o644) // TempFile uses 0o600 by default
-			if err != nil {
-				return err
-			}
-			// Store this archive in the cache.
-			return os.Rename(f.Name(), archiveFilePath)
-		},
-	}
-
-	sourceDir := l.sourceDir()
-
-	// Create jobs to compile all sources. These jobs are depended upon by the
-	// archive job above, so must be run first.
-	paths, err := l.librarySources(target)
-	if err != nil {
-		return nil, nil, err
-	}
-	for _, path := range paths {
-		// Strip leading "../" parts off the path.
-		cleanpath := path
-		for strings.HasPrefix(cleanpath, "../") {
-			cleanpath = cleanpath[3:]
-		}
-		srcpath := filepath.Join(sourceDir, path)
-		objpath := filepath.Join(dir, cleanpath+".o")
-		os.MkdirAll(filepath.Dir(objpath), 0o777)
-		objs = append(objs, objpath)
-		job.dependencies = append(job.dependencies, &compileJob{
-			description: "compile " + srcpath,
-			run: func(*compileJob) error {
-				var compileArgs []string
-				compileArgs = append(compileArgs, args...)
-				compileArgs = append(compileArgs, "-o", objpath, srcpath)
-				if config.Options.PrintCommands != nil {
-					config.Options.PrintCommands("clang", compileArgs...)
-				}
-				err := runCCompiler(compileArgs...)
-				if err != nil {
-					return &commandError{"failed to build", srcpath, err}
-				}
-				return nil
-			},
-		})
-	}
-
-	// Create crt1.o job, if needed.
-	// Add this as a (fake) dependency to the ar file so it gets compiled.
-	// (It could be done in parallel with creating the ar file, but it probably
-	// won't make much of a difference in speed).
-	if l.crt1Source != "" {
-		srcpath := filepath.Join(sourceDir, l.crt1Source)
-		job.dependencies = append(job.dependencies, &compileJob{
-			description: "compile " + srcpath,
-			run: func(*compileJob) error {
-				var compileArgs []string
-				compileArgs = append(compileArgs, args...)
-				tmpfile, err := os.CreateTemp(outdir, "crt1.o.tmp*")
-				if err != nil {
-					return err
-				}
-				tmpfile.Close()
-				compileArgs = append(compileArgs, "-o", tmpfile.Name(), srcpath)
-				if config.Options.PrintCommands != nil {
-					config.Options.PrintCommands("clang", compileArgs...)
-				}
-				err = runCCompiler(compileArgs...)
-				if err != nil {
-					return &commandError{"failed to build", srcpath, err}
-				}
-				return os.Rename(tmpfile.Name(), filepath.Join(outdir, "crt1.o"))
-			},
-		})
-	}
-
-	ok = true
-	return job, func() {
-		once.Do(unlock)
-	}, nil
-}

builder/lld.cpp

@@ -1,43 +0,0 @@
-//go:build byollvm
-
-// This file provides C wrappers for liblld.
-
-#include <lld/Common/Driver.h>
-#include <llvm/Support/Parallel.h>
-
-extern "C" {
-
-static void configure() {
-#if _WIN64
-	// This is a hack to work around a hang in the LLD linker on Windows, with
-	// -DLLVM_ENABLE_THREADS=ON. It has a similar effect as the -threads=1
-	// linker flag, but with support for the COFF linker.
-	llvm::parallel::strategy = llvm::hardware_concurrency(1);
-#endif
-}
-
-bool tinygo_link_elf(int argc, char **argv) {
-	configure();
-	std::vector<const char*> args(argv, argv + argc);
-	return lld::elf::link(args, llvm::outs(), llvm::errs(), false, false);
-}
-
-bool tinygo_link_macho(int argc, char **argv) {
-	configure();
-	std::vector<const char*> args(argv, argv + argc);
-	return lld::macho::link(args, llvm::outs(), llvm::errs(), false, false);
-}
-
-bool tinygo_link_mingw(int argc, char **argv) {
-	configure();
-	std::vector<const char*> args(argv, argv + argc);
-	return lld::mingw::link(args, llvm::outs(), llvm::errs(), false, false);
-}
-
-bool tinygo_link_wasm(int argc, char **argv) {
-	configure();
-	std::vector<const char*> args(argv, argv + argc);
-	return lld::wasm::link(args, llvm::outs(), llvm::errs(), false, false);
-}
-
-} // external "C"

builder/mingw-w64.go

@@ -1,104 +0,0 @@
-package builder
-
-import (
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"strings"
-
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-var MinGW = Library{
-	name: "mingw-w64",
-	makeHeaders: func(target, includeDir string) error {
-		// copy _mingw.h
-		srcDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib", "mingw-w64")
-		outf, err := os.Create(includeDir + "/_mingw.h")
-		if err != nil {
-			return err
-		}
-		defer outf.Close()
-		inf, err := os.Open(srcDir + "/mingw-w64-headers/crt/_mingw.h.in")
-		if err != nil {
-			return err
-		}
-		_, err = io.Copy(outf, inf)
-		return err
-	},
-	sourceDir: func() string { return "" }, // unused
-	cflags: func(target, headerPath string) []string {
-		// No flags necessary because there are no files to compile.
-		return nil
-	},
-	librarySources: func(target string) ([]string, error) {
-		// We only use the UCRT DLL file. No source files necessary.
-		return nil, nil
-	},
-}
-
-// makeMinGWExtraLibs returns a slice of jobs to import the correct .dll
-// libraries. This is done by converting input .def files to .lib files which
-// can then be linked as usual.
-//
-// TODO: cache the result. At the moment, it costs a few hundred milliseconds to
-// compile these files.
-func makeMinGWExtraLibs(tmpdir, goarch string) []*compileJob {
-	var jobs []*compileJob
-	root := goenv.Get("TINYGOROOT")
-	// Normally all the api-ms-win-crt-*.def files are all compiled to a single
-	// .lib file. But to simplify things, we're going to leave them as separate
-	// files.
-	for _, name := range []string{
-		"kernel32.def.in",
-		"api-ms-win-crt-conio-l1-1-0.def",
-		"api-ms-win-crt-convert-l1-1-0.def.in",
-		"api-ms-win-crt-environment-l1-1-0.def",
-		"api-ms-win-crt-filesystem-l1-1-0.def",
-		"api-ms-win-crt-heap-l1-1-0.def",
-		"api-ms-win-crt-locale-l1-1-0.def",
-		"api-ms-win-crt-math-l1-1-0.def.in",
-		"api-ms-win-crt-multibyte-l1-1-0.def",
-		"api-ms-win-crt-private-l1-1-0.def.in",
-		"api-ms-win-crt-process-l1-1-0.def",
-		"api-ms-win-crt-runtime-l1-1-0.def.in",
-		"api-ms-win-crt-stdio-l1-1-0.def",
-		"api-ms-win-crt-string-l1-1-0.def",
-		"api-ms-win-crt-time-l1-1-0.def",
-		"api-ms-win-crt-utility-l1-1-0.def",
-	} {
-		outpath := filepath.Join(tmpdir, filepath.Base(name)+".lib")
-		inpath := filepath.Join(root, "lib/mingw-w64/mingw-w64-crt/lib-common/"+name)
-		job := &compileJob{
-			description: "create lib file " + inpath,
-			result:      outpath,
-			run: func(job *compileJob) error {
-				defpath := inpath
-				var archDef, emulation string
-				switch goarch {
-				case "amd64":
-					archDef = "-DDEF_X64"
-					emulation = "i386pep"
-				case "arm64":
-					archDef = "-DDEF_ARM64"
-					emulation = "arm64pe"
-				default:
-					return fmt.Errorf("unsupported architecture for mingw-w64: %s", goarch)
-				}
-				if strings.HasSuffix(inpath, ".in") {
-					// .in files need to be preprocessed by a preprocessor (-E)
-					// first.
-					defpath = outpath + ".def"
-					err := runCCompiler("-E", "-x", "c", "-Wp,-w", "-P", archDef, "-DDATA", "-o", defpath, inpath, "-I"+goenv.Get("TINYGOROOT")+"/lib/mingw-w64/mingw-w64-crt/def-include/")
-					if err != nil {
-						return err
-					}
-				}
-				return link("ld.lld", "-m", emulation, "-o", outpath, defpath)
-			},
-		}
-		jobs = append(jobs, job)
-	}
-	return jobs
-}

builder/musl.go

@@ -1,181 +0,0 @@
-package builder
-
-import (
-	"bytes"
-	"fmt"
-	"os"
-	"path/filepath"
-	"regexp"
-	"strconv"
-	"strings"
-
-	"github.com/tinygo-org/tinygo/compileopts"
-	"github.com/tinygo-org/tinygo/goenv"
-	"tinygo.org/x/go-llvm"
-)
-
-var Musl = Library{
-	name: "musl",
-	makeHeaders: func(target, includeDir string) error {
-		bits := filepath.Join(includeDir, "bits")
-		err := os.Mkdir(bits, 0777)
-		if err != nil {
-			return err
-		}
-
-		arch := compileopts.MuslArchitecture(target)
-		muslDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib", "musl")
-
-		// Create the file alltypes.h.
-		f, err := os.Create(filepath.Join(bits, "alltypes.h"))
-		if err != nil {
-			return err
-		}
-		infiles := []string{
-			filepath.Join(muslDir, "arch", arch, "bits", "alltypes.h.in"),
-			filepath.Join(muslDir, "include", "alltypes.h.in"),
-		}
-		for _, infile := range infiles {
-			data, err := os.ReadFile(infile)
-			if err != nil {
-				return err
-			}
-			lines := strings.Split(string(data), "\n")
-			for _, line := range lines {
-				if strings.HasPrefix(line, "TYPEDEF ") {
-					matches := regexp.MustCompile(`TYPEDEF (.*) ([^ ]*);`).FindStringSubmatch(line)
-					value := matches[1]
-					name := matches[2]
-					line = fmt.Sprintf("#if defined(__NEED_%s) && !defined(__DEFINED_%s)\ntypedef %s %s;\n#define __DEFINED_%s\n#endif\n", name, name, value, name, name)
-				}
-				if strings.HasPrefix(line, "STRUCT ") {
-					matches := regexp.MustCompile(`STRUCT * ([^ ]*) (.*);`).FindStringSubmatch(line)
-					name := matches[1]
-					value := matches[2]
-					line = fmt.Sprintf("#if defined(__NEED_struct_%s) && !defined(__DEFINED_struct_%s)\nstruct %s %s;\n#define __DEFINED_struct_%s\n#endif\n", name, name, name, value, name)
-				}
-				f.WriteString(line + "\n")
-			}
-		}
-		f.Close()
-
-		// Create the file syscall.h.
-		f, err = os.Create(filepath.Join(bits, "syscall.h"))
-		if err != nil {
-			return err
-		}
-		data, err := os.ReadFile(filepath.Join(muslDir, "arch", arch, "bits", "syscall.h.in"))
-		if err != nil {
-			return err
-		}
-		_, err = f.Write(bytes.ReplaceAll(data, []byte("__NR_"), []byte("SYS_")))
-		if err != nil {
-			return err
-		}
-		f.Close()
-
-		return nil
-	},
-	cflags: func(target, headerPath string) []string {
-		arch := compileopts.MuslArchitecture(target)
-		muslDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/musl")
-		cflags := []string{
-			"-std=c99",            // same as in musl
-			"-D_XOPEN_SOURCE=700", // same as in musl
-			// Musl triggers some warnings and we don't want to show any
-			// warnings while compiling (only errors or silence), so disable
-			// specific warnings that are triggered in musl.
-			"-Werror",
-			"-Wno-logical-op-parentheses",
-			"-Wno-bitwise-op-parentheses",
-			"-Wno-shift-op-parentheses",
-			"-Wno-ignored-attributes",
-			"-Wno-string-plus-int",
-			"-Wno-ignored-pragmas",
-			"-Wno-tautological-constant-out-of-range-compare",
-			"-Qunused-arguments",
-			// Select include dirs. Don't include standard library includes
-			// (that would introduce host dependencies and other complications),
-			// but do include all the include directories expected by musl.
-			"-nostdlibinc",
-			"-I" + muslDir + "/arch/" + arch,
-			"-I" + muslDir + "/arch/generic",
-			"-I" + muslDir + "/src/include",
-			"-I" + muslDir + "/src/internal",
-			"-I" + headerPath,
-			"-I" + muslDir + "/include",
-			"-fno-stack-protector",
-		}
-		llvmMajor, _ := strconv.Atoi(strings.SplitN(llvm.Version, ".", 2)[0])
-		if llvmMajor >= 15 {
-			// This flag was added in Clang 15. It is not present in LLVM 14.
-			cflags = append(cflags, "-Wno-deprecated-non-prototype")
-		}
-		return cflags
-	},
-	sourceDir: func() string { return filepath.Join(goenv.Get("TINYGOROOT"), "lib/musl/src") },
-	librarySources: func(target string) ([]string, error) {
-		arch := compileopts.MuslArchitecture(target)
-		globs := []string{
-			"env/*.c",
-			"errno/*.c",
-			"exit/*.c",
-			"internal/defsysinfo.c",
-			"internal/libc.c",
-			"internal/syscall_ret.c",
-			"internal/vdso.c",
-			"legacy/*.c",
-			"malloc/*.c",
-			"malloc/mallocng/*.c",
-			"mman/*.c",
-			"math/*.c",
-			"signal/*.c",
-			"stdio/*.c",
-			"string/*.c",
-			"thread/" + arch + "/*.s",
-			"thread/*.c",
-			"time/*.c",
-			"unistd/*.c",
-		}
-		if arch == "arm" {
-			// These files need to be added to the start for some reason.
-			globs = append([]string{"thread/arm/*.c"}, globs...)
-		}
-
-		var sources []string
-		seenSources := map[string]struct{}{}
-		basepath := goenv.Get("TINYGOROOT") + "/lib/musl/src/"
-		for _, pattern := range globs {
-			matches, err := filepath.Glob(basepath + pattern)
-			if err != nil {
-				// From the documentation:
-				// > Glob ignores file system errors such as I/O errors reading
-				// > directories. The only possible returned error is
-				// > ErrBadPattern, when pattern is malformed.
-				// So the only possible error is when the (statically defined)
-				// pattern is wrong. In other words, a programming bug.
-				return nil, fmt.Errorf("musl: could not glob source dirs: %w", err)
-			}
-			if len(matches) == 0 {
-				return nil, fmt.Errorf("musl: did not find any files for pattern %#v", pattern)
-			}
-			for _, match := range matches {
-				relpath, err := filepath.Rel(basepath, match)
-				if err != nil {
-					// Not sure if this is even possible.
-					return nil, err
-				}
-				// Make sure architecture specific files override generic files.
-				id := strings.ReplaceAll(relpath, "/"+arch+"/", "/")
-				if _, ok := seenSources[id]; ok {
-					// Already seen this file, skipping this (generic) file.
-					continue
-				}
-				seenSources[id] = struct{}{}
-				sources = append(sources, relpath)
-			}
-		}
-		return sources, nil
-	},
-	crt1Source: "../crt/crt1.c", // lib/musl/crt/crt1.c
-}

builder/nrfutil.go

@@ -1,27 +0,0 @@
-package builder
-
-import (
-	"fmt"
-	"io"
-	"os/exec"
-
-	"github.com/tinygo-org/tinygo/compileopts"
-)
-
-// https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrfutil%2FUG%2Fnrfutil%2Fnrfutil_intro.html
-
-func makeDFUFirmwareImage(options *compileopts.Options, infile, outfile string) error {
-	cmdLine := []string{"nrfutil", "pkg", "generate", "--hw-version", "52", "--sd-req", "0x0", "--debug-mode", "--application", infile, outfile}
-
-	if options.PrintCommands != nil {
-		options.PrintCommands(cmdLine[0], cmdLine[1:]...)
-	}
-
-	cmd := exec.Command(cmdLine[0], cmdLine[1:]...)
-	cmd.Stdout = io.Discard
-	err := cmd.Run()
-	if err != nil {
-		return fmt.Errorf("could not run nrfutil pkg generate: %w", err)
-	}
-	return nil
-}

builder/objcopy.go

@@ -1,141 +0,0 @@
-package builder
-
-import (
-	"debug/elf"
-	"io"
-	"os"
-	"sort"
-
-	"github.com/marcinbor85/gohex"
-)
-
-// maxPadBytes is the maximum allowed bytes to be padded in a rom extraction
-// this value is currently defined by Nintendo Switch Page Alignment (4096 bytes)
-const maxPadBytes = 4095
-
-// objcopyError is an error returned by functions that act like objcopy.
-type objcopyError struct {
-	Op  string
-	Err error
-}
-
-func (e objcopyError) Error() string {
-	if e.Err == nil {
-		return e.Op
-	}
-	return e.Op + ": " + e.Err.Error()
-}
-
-type progSlice []*elf.Prog
-
-func (s progSlice) Len() int           { return len(s) }
-func (s progSlice) Less(i, j int) bool { return s[i].Paddr < s[j].Paddr }
-func (s progSlice) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
-
-// extractROM extracts a firmware image and the first load address from the
-// given ELF file. It tries to emulate the behavior of objcopy.
-func extractROM(path string) (uint64, []byte, error) {
-	f, err := elf.Open(path)
-	if err != nil {
-		return 0, nil, objcopyError{"failed to open ELF file to extract text segment", err}
-	}
-	defer f.Close()
-
-	// The GNU objcopy command does the following for firmware extraction (from
-	// the man page):
-	// > When objcopy generates a raw binary file, it will essentially produce a
-	// > memory dump of the contents of the input object file. All symbols and
-	// > relocation information will be discarded. The memory dump will start at
-	// > the load address of the lowest section copied into the output file.
-
-	// Find the lowest section address.
-	startAddr := ^uint64(0)
-	for _, section := range f.Sections {
-		if section.Type != elf.SHT_PROGBITS || section.Flags&elf.SHF_ALLOC == 0 {
-			continue
-		}
-		if section.Addr < startAddr {
-			startAddr = section.Addr
-		}
-	}
-
-	progs := make(progSlice, 0, 2)
-	for _, prog := range f.Progs {
-		if prog.Type != elf.PT_LOAD || prog.Filesz == 0 || prog.Off == 0 {
-			continue
-		}
-		progs = append(progs, prog)
-	}
-	if len(progs) == 0 {
-		return 0, nil, objcopyError{"file does not contain ROM segments: " + path, nil}
-	}
-	sort.Sort(progs)
-
-	var rom []byte
-	for _, prog := range progs {
-		romEnd := progs[0].Paddr + uint64(len(rom))
-		if prog.Paddr > romEnd && prog.Paddr < romEnd+16 {
-			// Sometimes, the linker seems to insert a bit of padding between
-			// segments. Simply zero-fill these parts.
-			rom = append(rom, make([]byte, prog.Paddr-romEnd)...)
-		}
-		if prog.Paddr != progs[0].Paddr+uint64(len(rom)) {
-			diff := prog.Paddr - (progs[0].Paddr + uint64(len(rom)))
-			if diff > maxPadBytes {
-				return 0, nil, objcopyError{"ROM segments are non-contiguous: " + path, nil}
-			}
-			// Pad the difference
-			rom = append(rom, make([]byte, diff)...)
-		}
-		data, err := io.ReadAll(prog.Open())
-		if err != nil {
-			return 0, nil, objcopyError{"failed to extract segment from ELF file: " + path, err}
-		}
-		rom = append(rom, data...)
-	}
-	if progs[0].Paddr < startAddr {
-		// The lowest memory address is before the first section. This means
-		// that there is some extra data loaded at the start of the image that
-		// should be discarded.
-		// Example: ELF files where .text doesn't start at address 0 because
-		// there is a bootloader at the start.
-		return startAddr, rom[startAddr-progs[0].Paddr:], nil
-	} else {
-		return progs[0].Paddr, rom, nil
-	}
-}
-
-// objcopy converts an ELF file to a different (simpler) output file format:
-// .bin or .hex. It extracts only the .text section.
-func objcopy(infile, outfile, binaryFormat string) error {
-	f, err := os.OpenFile(outfile, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
-	if err != nil {
-		return err
-	}
-	defer f.Close()
-
-	// Read the .text segment.
-	addr, data, err := extractROM(infile)
-	if err != nil {
-		return err
-	}
-
-	// Write to the file, in the correct format.
-	switch binaryFormat {
-	case "hex":
-		// Intel hex file, includes the firmware start address.
-		mem := gohex.NewMemory()
-		err := mem.AddBinary(uint32(addr), data)
-		if err != nil {
-			return objcopyError{"failed to create .hex file", err}
-		}
-		return mem.DumpIntelHex(f, 16)
-	case "bin":
-		// The start address is not stored in raw firmware files (therefore you
-		// should use .hex files in most cases).
-		_, err := f.Write(data)
-		return err
-	default:
-		panic("unreachable")
-	}
-}

builder/picolibc.go

@@ -1,422 +0,0 @@
-package builder
-
-import (
-	"os"
-	"path/filepath"
-
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-// Picolibc is a C library for bare metal embedded devices. It was originally
-// based on newlib.
-var Picolibc = Library{
-	name: "picolibc",
-	makeHeaders: func(target, includeDir string) error {
-		f, err := os.Create(filepath.Join(includeDir, "picolibc.h"))
-		if err != nil {
-			return err
-		}
-		return f.Close()
-	},
-	cflags: func(target, headerPath string) []string {
-		newlibDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/picolibc/newlib")
-		return []string{
-			"-Werror",
-			"-Wall",
-			"-std=gnu11",
-			"-D_COMPILING_NEWLIB",
-			"-D_HAVE_ALIAS_ATTRIBUTE",
-			"-DTINY_STDIO",
-			"-DPOSIX_IO",
-			"-D_IEEE_LIBM",
-			"-D__OBSOLETE_MATH_FLOAT=1", // use old math code that doesn't expect a FPU
-			"-D__OBSOLETE_MATH_DOUBLE=0",
-			"-D_WANT_IO_C99_FORMATS",
-			"-nostdlibinc",
-			"-isystem", newlibDir + "/libc/include",
-			"-I" + newlibDir + "/libc/tinystdio",
-			"-I" + newlibDir + "/libm/common",
-			"-I" + headerPath,
-		}
-	},
-	sourceDir: func() string { return filepath.Join(goenv.Get("TINYGOROOT"), "lib/picolibc/newlib") },
-	librarySources: func(target string) ([]string, error) {
-		return picolibcSources, nil
-	},
-}
-
-var picolibcSources = []string{
-	"../../picolibc-stdio.c",
-
-	// srcs_tinystdio
-	"libc/tinystdio/asprintf.c",
-	"libc/tinystdio/bufio.c",
-	"libc/tinystdio/clearerr.c",
-	"libc/tinystdio/ecvt_r.c",
-	"libc/tinystdio/ecvt.c",
-	"libc/tinystdio/ecvtf_r.c",
-	"libc/tinystdio/ecvtf.c",
-	"libc/tinystdio/fcvt.c",
-	"libc/tinystdio/fcvt_r.c",
-	"libc/tinystdio/fcvtf.c",
-	"libc/tinystdio/fcvtf_r.c",
-	"libc/tinystdio/gcvt.c",
-	"libc/tinystdio/gcvtf.c",
-	"libc/tinystdio/fclose.c",
-	"libc/tinystdio/fdevopen.c",
-	"libc/tinystdio/feof.c",
-	"libc/tinystdio/ferror.c",
-	"libc/tinystdio/fflush.c",
-	"libc/tinystdio/fgetc.c",
-	"libc/tinystdio/fgets.c",
-	"libc/tinystdio/fileno.c",
-	"libc/tinystdio/filestrget.c",
-	"libc/tinystdio/filestrput.c",
-	"libc/tinystdio/filestrputalloc.c",
-	"libc/tinystdio/fmemopen.c",
-	"libc/tinystdio/fprintf.c",
-	"libc/tinystdio/fputc.c",
-	"libc/tinystdio/fputs.c",
-	"libc/tinystdio/fread.c",
-	//"libc/tinystdio/freopen.c", // crashes with AVR, see: https://github.com/picolibc/picolibc/pull/369
-	"libc/tinystdio/fscanf.c",
-	"libc/tinystdio/fseek.c",
-	"libc/tinystdio/fseeko.c",
-	"libc/tinystdio/ftell.c",
-	"libc/tinystdio/ftello.c",
-	"libc/tinystdio/fwrite.c",
-	"libc/tinystdio/getchar.c",
-	"libc/tinystdio/gets.c",
-	"libc/tinystdio/matchcaseprefix.c",
-	"libc/tinystdio/mktemp.c",
-	"libc/tinystdio/perror.c",
-	"libc/tinystdio/printf.c",
-	"libc/tinystdio/putchar.c",
-	"libc/tinystdio/puts.c",
-	"libc/tinystdio/rewind.c",
-	"libc/tinystdio/scanf.c",
-	"libc/tinystdio/setbuf.c",
-	"libc/tinystdio/setbuffer.c",
-	"libc/tinystdio/setlinebuf.c",
-	"libc/tinystdio/setvbuf.c",
-	"libc/tinystdio/snprintf.c",
-	"libc/tinystdio/sprintf.c",
-	"libc/tinystdio/snprintfd.c",
-	"libc/tinystdio/snprintff.c",
-	"libc/tinystdio/sprintff.c",
-	"libc/tinystdio/sprintfd.c",
-	"libc/tinystdio/sscanf.c",
-	"libc/tinystdio/strfromf.c",
-	"libc/tinystdio/strfromd.c",
-	"libc/tinystdio/strtof.c",
-	"libc/tinystdio/strtof_l.c",
-	"libc/tinystdio/strtod.c",
-	"libc/tinystdio/strtod_l.c",
-	"libc/tinystdio/ungetc.c",
-	"libc/tinystdio/vasprintf.c",
-	"libc/tinystdio/vfiprintf.c",
-	"libc/tinystdio/vfprintf.c",
-	"libc/tinystdio/vfprintff.c",
-	"libc/tinystdio/vfscanf.c",
-	"libc/tinystdio/vfiscanf.c",
-	"libc/tinystdio/vfscanff.c",
-	"libc/tinystdio/vprintf.c",
-	"libc/tinystdio/vscanf.c",
-	"libc/tinystdio/vsscanf.c",
-	"libc/tinystdio/vsnprintf.c",
-	"libc/tinystdio/vsprintf.c",
-
-	"libc/string/bcmp.c",
-	"libc/string/bcopy.c",
-	"libc/string/bzero.c",
-	"libc/string/explicit_bzero.c",
-	"libc/string/ffsl.c",
-	"libc/string/ffsll.c",
-	"libc/string/fls.c",
-	"libc/string/flsl.c",
-	"libc/string/flsll.c",
-	"libc/string/gnu_basename.c",
-	"libc/string/index.c",
-	"libc/string/memccpy.c",
-	"libc/string/memchr.c",
-	"libc/string/memcmp.c",
-	"libc/string/memcpy.c",
-	"libc/string/memmem.c",
-	"libc/string/memmove.c",
-	"libc/string/mempcpy.c",
-	"libc/string/memrchr.c",
-	"libc/string/memset.c",
-	"libc/string/rawmemchr.c",
-	"libc/string/rindex.c",
-	"libc/string/stpcpy.c",
-	"libc/string/stpncpy.c",
-	"libc/string/strcasecmp.c",
-	"libc/string/strcasecmp_l.c",
-	"libc/string/strcasestr.c",
-	"libc/string/strcat.c",
-	"libc/string/strchr.c",
-	"libc/string/strchrnul.c",
-	"libc/string/strcmp.c",
-	"libc/string/strcoll.c",
-	"libc/string/strcoll_l.c",
-	"libc/string/strcpy.c",
-	"libc/string/strcspn.c",
-	"libc/string/strdup.c",
-	"libc/string/strerror.c",
-	"libc/string/strerror_r.c",
-	"libc/string/strlcat.c",
-	"libc/string/strlcpy.c",
-	"libc/string/strlen.c",
-	"libc/string/strlwr.c",
-	"libc/string/strncasecmp.c",
-	"libc/string/strncasecmp_l.c",
-	"libc/string/strncat.c",
-	"libc/string/strncmp.c",
-	"libc/string/strncpy.c",
-	"libc/string/strndup.c",
-	"libc/string/strnlen.c",
-	"libc/string/strnstr.c",
-	"libc/string/strpbrk.c",
-	"libc/string/strrchr.c",
-	"libc/string/strsep.c",
-	"libc/string/strsignal.c",
-	"libc/string/strspn.c",
-	"libc/string/strstr.c",
-	"libc/string/strtok.c",
-	"libc/string/strtok_r.c",
-	"libc/string/strupr.c",
-	"libc/string/strverscmp.c",
-	"libc/string/strxfrm.c",
-	"libc/string/strxfrm_l.c",
-	"libc/string/swab.c",
-	"libc/string/timingsafe_bcmp.c",
-	"libc/string/timingsafe_memcmp.c",
-	"libc/string/u_strerr.c",
-	"libc/string/wcpcpy.c",
-	"libc/string/wcpncpy.c",
-	"libc/string/wcscasecmp.c",
-	"libc/string/wcscasecmp_l.c",
-	"libc/string/wcscat.c",
-	"libc/string/wcschr.c",
-	"libc/string/wcscmp.c",
-	"libc/string/wcscoll.c",
-	"libc/string/wcscoll_l.c",
-	"libc/string/wcscpy.c",
-	"libc/string/wcscspn.c",
-	"libc/string/wcsdup.c",
-	"libc/string/wcslcat.c",
-	"libc/string/wcslcpy.c",
-	"libc/string/wcslen.c",
-	"libc/string/wcsncasecmp.c",
-	"libc/string/wcsncasecmp_l.c",
-	"libc/string/wcsncat.c",
-	"libc/string/wcsncmp.c",
-	"libc/string/wcsncpy.c",
-	"libc/string/wcsnlen.c",
-	"libc/string/wcspbrk.c",
-	"libc/string/wcsrchr.c",
-	"libc/string/wcsspn.c",
-	"libc/string/wcsstr.c",
-	"libc/string/wcstok.c",
-	"libc/string/wcswidth.c",
-	"libc/string/wcsxfrm.c",
-	"libc/string/wcsxfrm_l.c",
-	"libc/string/wcwidth.c",
-	"libc/string/wmemchr.c",
-	"libc/string/wmemcmp.c",
-	"libc/string/wmemcpy.c",
-	"libc/string/wmemmove.c",
-	"libc/string/wmempcpy.c",
-	"libc/string/wmemset.c",
-	"libc/string/xpg_strerror_r.c",
-
-	"libm/common/sf_finite.c",
-	"libm/common/sf_copysign.c",
-	"libm/common/sf_modf.c",
-	"libm/common/sf_scalbn.c",
-	"libm/common/sf_cbrt.c",
-	"libm/common/sf_exp10.c",
-	"libm/common/sf_expm1.c",
-	"libm/common/sf_ilogb.c",
-	"libm/common/sf_infinity.c",
-	"libm/common/sf_isinf.c",
-	"libm/common/sf_isinff.c",
-	"libm/common/sf_isnan.c",
-	"libm/common/sf_isnanf.c",
-	"libm/common/sf_issignaling.c",
-	"libm/common/sf_log1p.c",
-	"libm/common/sf_nan.c",
-	"libm/common/sf_nextafter.c",
-	"libm/common/sf_pow10.c",
-	"libm/common/sf_rint.c",
-	"libm/common/sf_logb.c",
-	"libm/common/sf_fdim.c",
-	"libm/common/sf_fma.c",
-	"libm/common/sf_fmax.c",
-	"libm/common/sf_fmin.c",
-	"libm/common/sf_fpclassify.c",
-	"libm/common/sf_lrint.c",
-	"libm/common/sf_llrint.c",
-	"libm/common/sf_lround.c",
-	"libm/common/sf_llround.c",
-	"libm/common/sf_nearbyint.c",
-	"libm/common/sf_remquo.c",
-	"libm/common/sf_round.c",
-	"libm/common/sf_scalbln.c",
-	"libm/common/sf_trunc.c",
-	"libm/common/sf_exp.c",
-	"libm/common/sf_exp2.c",
-	"libm/common/sf_exp2_data.c",
-	"libm/common/sf_log.c",
-	"libm/common/sf_log_data.c",
-	"libm/common/sf_log2.c",
-	"libm/common/sf_log2_data.c",
-	"libm/common/sf_pow_log2_data.c",
-	"libm/common/sf_pow.c",
-
-	"libm/common/s_finite.c",
-	"libm/common/s_copysign.c",
-	"libm/common/s_modf.c",
-	"libm/common/s_scalbn.c",
-	"libm/common/s_cbrt.c",
-	"libm/common/s_exp10.c",
-	"libm/common/s_expm1.c",
-	"libm/common/s_ilogb.c",
-	"libm/common/s_infinity.c",
-	"libm/common/s_iseqsig.c",
-	"libm/common/s_isinf.c",
-	"libm/common/s_isinfd.c",
-	"libm/common/s_isnan.c",
-	"libm/common/s_isnand.c",
-	"libm/common/s_issignaling.c",
-	"libm/common/s_log1p.c",
-	"libm/common/s_nan.c",
-	"libm/common/s_nextafter.c",
-	"libm/common/s_pow10.c",
-	"libm/common/s_rint.c",
-	"libm/common/s_logb.c",
-	"libm/common/s_log2.c",
-	"libm/common/s_fdim.c",
-	"libm/common/s_fma.c",
-	"libm/common/s_fmax.c",
-	"libm/common/s_fmin.c",
-	"libm/common/s_fpclassify.c",
-	"libm/common/s_getpayload.c",
-	"libm/common/s_lrint.c",
-	"libm/common/s_llrint.c",
-	"libm/common/s_lround.c",
-	"libm/common/s_llround.c",
-	"libm/common/s_nearbyint.c",
-	"libm/common/s_remquo.c",
-	"libm/common/s_round.c",
-	"libm/common/s_scalbln.c",
-	"libm/common/s_signbit.c",
-	"libm/common/s_trunc.c",
-	"libm/common/exp.c",
-	"libm/common/exp2.c",
-	"libm/common/exp_data.c",
-	"libm/common/math_err_with_errno.c",
-	"libm/common/math_err_uflow.c",
-	"libm/common/math_err_oflow.c",
-	"libm/common/math_err_divzero.c",
-	"libm/common/math_err_invalid.c",
-	"libm/common/math_err_may_uflow.c",
-	"libm/common/math_err_check_uflow.c",
-	"libm/common/math_err_check_oflow.c",
-	"libm/common/math_inexact.c",
-	"libm/common/math_inexactf.c",
-	"libm/common/log.c",
-	"libm/common/log_data.c",
-	"libm/common/log2.c",
-	"libm/common/log2_data.c",
-	"libm/common/pow.c",
-	"libm/common/pow_log_data.c",
-
-	"libm/math/k_cos.c",
-	"libm/math/k_rem_pio2.c",
-	"libm/math/k_sin.c",
-	"libm/math/k_tan.c",
-	"libm/math/kf_cos.c",
-	"libm/math/kf_rem_pio2.c",
-	"libm/math/kf_sin.c",
-	"libm/math/kf_tan.c",
-	"libm/math/s_acos.c",
-	"libm/math/s_acosh.c",
-	"libm/math/s_asin.c",
-	"libm/math/s_asinh.c",
-	"libm/math/s_atan.c",
-	"libm/math/s_atan2.c",
-	"libm/math/s_atanh.c",
-	"libm/math/s_ceil.c",
-	"libm/math/s_cos.c",
-	"libm/math/s_cosh.c",
-	"libm/math/s_drem.c",
-	"libm/math/s_erf.c",
-	"libm/math/s_exp.c",
-	"libm/math/s_exp2.c",
-	"libm/math/s_fabs.c",
-	"libm/math/s_floor.c",
-	"libm/math/s_fmod.c",
-	"libm/math/s_frexp.c",
-	"libm/math/s_gamma.c",
-	"libm/math/s_hypot.c",
-	"libm/math/s_j0.c",
-	"libm/math/s_j1.c",
-	"libm/math/s_jn.c",
-	"libm/math/s_lgamma.c",
-	"libm/math/s_log.c",
-	"libm/math/s_log10.c",
-	"libm/math/s_pow.c",
-	"libm/math/s_rem_pio2.c",
-	"libm/math/s_remainder.c",
-	"libm/math/s_scalb.c",
-	"libm/math/s_signif.c",
-	"libm/math/s_sin.c",
-	"libm/math/s_sincos.c",
-	"libm/math/s_sinh.c",
-	"libm/math/s_sqrt.c",
-	"libm/math/s_tan.c",
-	"libm/math/s_tanh.c",
-	"libm/math/s_tgamma.c",
-	"libm/math/sf_acos.c",
-	"libm/math/sf_acosh.c",
-	"libm/math/sf_asin.c",
-	"libm/math/sf_asinh.c",
-	"libm/math/sf_atan.c",
-	"libm/math/sf_atan2.c",
-	"libm/math/sf_atanh.c",
-	"libm/math/sf_ceil.c",
-	"libm/math/sf_cos.c",
-	"libm/math/sf_cosh.c",
-	"libm/math/sf_drem.c",
-	"libm/math/sf_erf.c",
-	"libm/math/sf_exp.c",
-	"libm/math/sf_exp2.c",
-	"libm/math/sf_fabs.c",
-	"libm/math/sf_floor.c",
-	"libm/math/sf_fmod.c",
-	"libm/math/sf_frexp.c",
-	"libm/math/sf_gamma.c",
-	"libm/math/sf_hypot.c",
-	"libm/math/sf_j0.c",
-	"libm/math/sf_j1.c",
-	"libm/math/sf_jn.c",
-	"libm/math/sf_lgamma.c",
-	"libm/math/sf_log.c",
-	"libm/math/sf_log10.c",
-	"libm/math/sf_log2.c",
-	"libm/math/sf_pow.c",
-	"libm/math/sf_rem_pio2.c",
-	"libm/math/sf_remainder.c",
-	"libm/math/sf_scalb.c",
-	"libm/math/sf_signif.c",
-	"libm/math/sf_sin.c",
-	"libm/math/sf_sincos.c",
-	"libm/math/sf_sinh.c",
-	"libm/math/sf_sqrt.c",
-	"libm/math/sf_tan.c",
-	"libm/math/sf_tanh.c",
-	"libm/math/sf_tgamma.c",
-	"libm/math/sr_lgamma.c",
-	"libm/math/srf_lgamma.c",
-}

builder/sizes.go

@@ -1,935 +0,0 @@
-package builder
-
-import (
-	"bytes"
-	"debug/dwarf"
-	"debug/elf"
-	"debug/macho"
-	"debug/pe"
-	"encoding/binary"
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"regexp"
-	"sort"
-	"strings"
-
-	"github.com/aykevl/go-wasm"
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-// Set to true to print extra debug logs.
-const sizesDebug = false
-
-// programSize contains size statistics per package of a compiled program.
-type programSize struct {
-	Packages map[string]packageSize
-	Code     uint64
-	ROData   uint64
-	Data     uint64
-	BSS      uint64
-}
-
-// sortedPackageNames returns the list of package names (ProgramSize.Packages)
-// sorted alphabetically.
-func (ps *programSize) sortedPackageNames() []string {
-	names := make([]string, 0, len(ps.Packages))
-	for name := range ps.Packages {
-		names = append(names, name)
-	}
-	sort.Strings(names)
-	return names
-}
-
-// Flash usage in regular microcontrollers.
-func (ps *programSize) Flash() uint64 {
-	return ps.Code + ps.ROData + ps.Data
-}
-
-// Static RAM usage in regular microcontrollers.
-func (ps *programSize) RAM() uint64 {
-	return ps.Data + ps.BSS
-}
-
-// packageSize contains the size of a package, calculated from the linked object
-// file.
-type packageSize struct {
-	Code   uint64
-	ROData uint64
-	Data   uint64
-	BSS    uint64
-}
-
-// Flash usage in regular microcontrollers.
-func (ps *packageSize) Flash() uint64 {
-	return ps.Code + ps.ROData + ps.Data
-}
-
-// Static RAM usage in regular microcontrollers.
-func (ps *packageSize) RAM() uint64 {
-	return ps.Data + ps.BSS
-}
-
-// A mapping of a single chunk of code or data to a file path.
-type addressLine struct {
-	Address    uint64
-	Length     uint64 // length of this chunk
-	Align      uint64 // (maximum) alignment of this line
-	File       string // file path as stored in DWARF
-	IsVariable bool   // true if this is a variable (or constant), false if it is code
-}
-
-// Sections defined in the input file. This struct defines them in a
-// filetype-agnostic way but roughly follow the ELF types (.text, .data, .bss,
-// etc).
-type memorySection struct {
-	Type    memoryType
-	Address uint64
-	Size    uint64
-	Align   uint64
-}
-
-type memoryType int
-
-const (
-	memoryCode memoryType = iota + 1
-	memoryData
-	memoryROData
-	memoryBSS
-	memoryStack
-)
-
-func (t memoryType) String() string {
-	return [...]string{
-		0:            "-",
-		memoryCode:   "code",
-		memoryData:   "data",
-		memoryROData: "rodata",
-		memoryBSS:    "bss",
-		memoryStack:  "stack",
-	}[t]
-}
-
-// Regular expressions to match particular symbol names. These are not stored as
-// DWARF variables because they have no mapping to source code global variables.
-var (
-	// Various globals that aren't a variable but nonetheless need to be stored
-	// somewhere:
-	//   alloc:  heap allocations during init interpretation
-	//   pack:   data created when storing a constant in an interface for example
-	//   string: buffer behind strings
-	packageSymbolRegexp = regexp.MustCompile(`\$(alloc|pack|string)(\.[0-9]+)?$`)
-)
-
-// readProgramSizeFromDWARF reads the source location for each line of code and
-// each variable in the program, as far as this is stored in the DWARF debug
-// information.
-func readProgramSizeFromDWARF(data *dwarf.Data, codeOffset, codeAlignment uint64, skipTombstone bool) ([]addressLine, error) {
-	r := data.Reader()
-	var lines []*dwarf.LineFile
-	var addresses []addressLine
-	for {
-		e, err := r.Next()
-		if err != nil {
-			return nil, err
-		}
-		if e == nil {
-			break
-		}
-		switch e.Tag {
-		case dwarf.TagCompileUnit:
-			// Found a compile unit.
-			// We can read the .debug_line section using it, which contains a
-			// mapping for most instructions to their file/line/column - even
-			// for inlined functions!
-			lr, err := data.LineReader(e)
-			if err != nil {
-				return nil, err
-			}
-			lines = lr.Files()
-			var lineEntry = dwarf.LineEntry{
-				EndSequence: true,
-			}
-
-			// Line tables are organized as sequences of line entries until an
-			// end sequence. A single line table can contain multiple such
-			// sequences. The last line entry is an EndSequence to indicate the
-			// end.
-			for {
-				// Read the next .debug_line entry.
-				prevLineEntry := lineEntry
-				err := lr.Next(&lineEntry)
-				if err != nil {
-					if err == io.EOF {
-						break
-					}
-					return nil, err
-				}
-
-				if prevLineEntry.EndSequence && lineEntry.Address == 0 && skipTombstone {
-					// Tombstone value. This symbol has been removed, for
-					// example by the --gc-sections linker flag. It is still
-					// here in the debug information because the linker can't
-					// just remove this reference.
-					// Read until the next EndSequence so that this sequence is
-					// skipped.
-					// For more details, see (among others):
-					// https://reviews.llvm.org/D84825
-					// The value 0 can however really occur in object files,
-					// that typically start at address 0. So don't skip
-					// tombstone values in object files (like when parsing MachO
-					// files).
-					for {
-						err := lr.Next(&lineEntry)
-						if err != nil {
-							return nil, err
-						}
-						if lineEntry.EndSequence {
-							break
-						}
-					}
-				}
-
-				if !prevLineEntry.EndSequence {
-					// The chunk describes the code from prevLineEntry to
-					// lineEntry.
-					line := addressLine{
-						Address: prevLineEntry.Address + codeOffset,
-						Length:  lineEntry.Address - prevLineEntry.Address,
-						Align:   codeAlignment,
-						File:    prevLineEntry.File.Name,
-					}
-					if line.Length != 0 {
-						addresses = append(addresses, line)
-					}
-				}
-			}
-		case dwarf.TagVariable:
-			// Global variable (or constant). Most of these are not actually
-			// stored in the binary, because they have been optimized out. Only
-			// the ones with a location are still present.
-			r.SkipChildren()
-
-			file := e.AttrField(dwarf.AttrDeclFile)
-			location := e.AttrField(dwarf.AttrLocation)
-			globalType := e.AttrField(dwarf.AttrType)
-			if file == nil || location == nil || globalType == nil {
-				// Doesn't contain the requested information.
-				continue
-			}
-
-			// Try to parse the location. While this could in theory be a very
-			// complex expression, usually it's just a DW_OP_addr opcode
-			// followed by an address.
-			addr, err := readDWARFConstant(r.AddressSize(), location.Val.([]uint8))
-			if err != nil {
-				continue // ignore the error, we don't know what to do with it
-			}
-
-			// Parse the type of the global variable, which (importantly)
-			// contains the variable size. We're not interested in the type,
-			// only in the size.
-			typ, err := data.Type(globalType.Val.(dwarf.Offset))
-			if err != nil {
-				return nil, err
-			}
-
-			// Read alignment, if it's stored as part of the debug information.
-			var alignment uint64
-			if attr := e.AttrField(dwarf.AttrAlignment); attr != nil {
-				alignment = uint64(attr.Val.(int64))
-			}
-
-			addresses = append(addresses, addressLine{
-				Address:    addr,
-				Length:     uint64(typ.Size()),
-				Align:      alignment,
-				File:       lines[file.Val.(int64)].Name,
-				IsVariable: true,
-			})
-		default:
-			r.SkipChildren()
-		}
-	}
-	return addresses, nil
-}
-
-// Parse a DWARF constant. For addresses, this is usually a very simple
-// expression.
-func readDWARFConstant(addressSize int, bytecode []byte) (uint64, error) {
-	var addr uint64
-	for len(bytecode) != 0 {
-		op := bytecode[0]
-		bytecode = bytecode[1:]
-		switch op {
-		case 0x03: // DW_OP_addr
-			switch addressSize {
-			case 2:
-				addr = uint64(binary.LittleEndian.Uint16(bytecode))
-			case 4:
-				addr = uint64(binary.LittleEndian.Uint32(bytecode))
-			case 8:
-				addr = binary.LittleEndian.Uint64(bytecode)
-			default:
-				panic("unexpected address size")
-			}
-			bytecode = bytecode[addressSize:]
-		case 0x23: // DW_OP_plus_uconst
-			offset, n := readULEB128(bytecode)
-			addr += offset
-			bytecode = bytecode[n:]
-		default:
-			return 0, fmt.Errorf("unknown DWARF opcode: 0x%x", op)
-		}
-	}
-	return addr, nil
-}
-
-// Source: https://en.wikipedia.org/wiki/LEB128#Decode_unsigned_integer
-func readULEB128(buf []byte) (result uint64, n int) {
-	var shift uint8
-	for {
-		b := buf[n]
-		n++
-		result |= uint64(b&0x7f) << shift
-		if b&0x80 == 0 {
-			break
-		}
-		shift += 7
-	}
-	return
-}
-
-// Read a MachO object file and return a line table.
-// Also return an index from symbol name to start address in the line table.
-func readMachOSymbolAddresses(path string) (map[string]int, []addressLine, error) {
-	// Some constants from mach-o/nlist.h
-	// See: https://opensource.apple.com/source/xnu/xnu-7195.141.2/EXTERNAL_HEADERS/mach-o/nlist.h.auto.html
-	const (
-		N_STAB = 0xe0
-		N_TYPE = 0x0e // bitmask for N_TYPE field
-		N_SECT = 0xe  // one of the possible type in the N_TYPE field
-	)
-
-	// Read DWARF from the given object file.
-	file, err := macho.Open(path)
-	if err != nil {
-		return nil, nil, err
-	}
-	defer file.Close()
-	dwarf, err := file.DWARF()
-	if err != nil {
-		return nil, nil, err
-	}
-	lines, err := readProgramSizeFromDWARF(dwarf, 0, 0, false)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	// Make a map from start addresses to indices in the line table (because the
-	// line table is a slice, not a map).
-	addressToLine := make(map[uint64]int, len(lines))
-	for i, line := range lines {
-		if _, ok := addressToLine[line.Address]; ok {
-			addressToLine[line.Address] = -1
-			continue
-		}
-		addressToLine[line.Address] = i
-	}
-
-	// Make a map that for each symbol gives the start index in the line table.
-	addresses := make(map[string]int, len(addressToLine))
-	for _, symbol := range file.Symtab.Syms {
-		if symbol.Type&N_STAB != 0 {
-			continue // STABS entry, ignore
-		}
-		if symbol.Type&0x0e != N_SECT {
-			continue // undefined symbol
-		}
-		if index, ok := addressToLine[symbol.Value]; ok && index >= 0 {
-			if _, ok := addresses[symbol.Name]; ok {
-				// There is a duplicate. Mark it as unavailable.
-				addresses[symbol.Name] = -1
-				continue
-			}
-			addresses[symbol.Name] = index
-		}
-	}
-
-	return addresses, lines, nil
-}
-
-// loadProgramSize calculate a program/data size breakdown of each package for a
-// given ELF file.
-// If the file doesn't contain DWARF debug information, the returned program
-// size will still have valid summaries but won't have complete size information
-// per package.
-func loadProgramSize(path string, packagePathMap map[string]string) (*programSize, error) {
-	// Open the binary file.
-	f, err := os.Open(path)
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-
-	// This stores all chunks of addresses found in the binary.
-	var addresses []addressLine
-
-	// Load the binary file, which could be in a number of file formats.
-	var sections []memorySection
-	if file, err := elf.NewFile(f); err == nil {
-		var codeAlignment uint64
-		switch file.Machine {
-		case elf.EM_ARM:
-			codeAlignment = 4 // usually 2, but can be 4
-		}
-		// Read DWARF information. The error is intentionally ignored.
-		data, _ := file.DWARF()
-		if data != nil {
-			addresses, err = readProgramSizeFromDWARF(data, 0, codeAlignment, true)
-			if err != nil {
-				// However, _do_ report an error here. Something must have gone
-				// wrong while trying to parse DWARF data.
-				return nil, err
-			}
-		}
-
-		// Read the ELF symbols for some more chunks of location information.
-		// Some globals (such as strings) aren't stored in the DWARF debug
-		// information and therefore need to be obtained in a different way.
-		allSymbols, err := file.Symbols()
-		if err != nil {
-			return nil, err
-		}
-		for _, symbol := range allSymbols {
-			symType := elf.ST_TYPE(symbol.Info)
-			if symbol.Size == 0 {
-				continue
-			}
-			if symType != elf.STT_FUNC && symType != elf.STT_OBJECT && symType != elf.STT_NOTYPE {
-				continue
-			}
-			if symbol.Section >= elf.SHN_LORESERVE {
-				// Not a regular section, so skip it.
-				// One example is elf.SHN_ABS, which is used for symbols
-				// declared with an absolute value such as the memset function
-				// on the ESP32 which is defined in the mask ROM.
-				continue
-			}
-			section := file.Sections[symbol.Section]
-			if section.Flags&elf.SHF_ALLOC == 0 {
-				continue
-			}
-			if packageSymbolRegexp.MatchString(symbol.Name) || symbol.Name == "__isr_vector" {
-				addresses = append(addresses, addressLine{
-					Address:    symbol.Value,
-					Length:     symbol.Size,
-					File:       symbol.Name,
-					IsVariable: true,
-				})
-			}
-		}
-
-		// Load allocated sections.
-		for _, section := range file.Sections {
-			if section.Flags&elf.SHF_ALLOC == 0 {
-				continue
-			}
-			if section.Type == elf.SHT_NOBITS {
-				if section.Name == ".stack" {
-					// TinyGo emits stack sections on microcontroller using the
-					// ".stack" name.
-					// This is a bit ugly, but I don't think there is a way to
-					// mark the stack section in a linker script.
-					sections = append(sections, memorySection{
-						Address: section.Addr,
-						Size:    section.Size,
-						Align:   section.Addralign,
-						Type:    memoryStack,
-					})
-				} else {
-					// Regular .bss section.
-					sections = append(sections, memorySection{
-						Address: section.Addr,
-						Size:    section.Size,
-						Align:   section.Addralign,
-						Type:    memoryBSS,
-					})
-				}
-			} else if section.Type == elf.SHT_PROGBITS && section.Flags&elf.SHF_EXECINSTR != 0 {
-				// .text
-				sections = append(sections, memorySection{
-					Address: section.Addr,
-					Size:    section.Size,
-					Align:   section.Addralign,
-					Type:    memoryCode,
-				})
-			} else if section.Type == elf.SHT_PROGBITS && section.Flags&elf.SHF_WRITE != 0 {
-				// .data
-				sections = append(sections, memorySection{
-					Address: section.Addr,
-					Size:    section.Size,
-					Align:   section.Addralign,
-					Type:    memoryData,
-				})
-			} else if section.Type == elf.SHT_PROGBITS {
-				// .rodata
-				sections = append(sections, memorySection{
-					Address: section.Addr,
-					Size:    section.Size,
-					Align:   section.Addralign,
-					Type:    memoryROData,
-				})
-			}
-		}
-	} else if file, err := macho.NewFile(f); err == nil {
-		// Read segments, for use while reading through sections.
-		segments := map[string]*macho.Segment{}
-		for _, load := range file.Loads {
-			switch load := load.(type) {
-			case *macho.Segment:
-				segments[load.Name] = load
-			}
-		}
-
-		// Read MachO sections.
-		for _, section := range file.Sections {
-			sectionType := section.Flags & 0xff
-			sectionFlags := section.Flags >> 8
-			segment := segments[section.Seg]
-			// For the constants used here, see:
-			// https://github.com/llvm/llvm-project/blob/release/14.x/llvm/include/llvm/BinaryFormat/MachO.h
-			if sectionFlags&0x800000 != 0 { // S_ATTR_PURE_INSTRUCTIONS
-				// Section containing only instructions.
-				sections = append(sections, memorySection{
-					Address: section.Addr,
-					Size:    uint64(section.Size),
-					Align:   uint64(section.Align),
-					Type:    memoryCode,
-				})
-			} else if sectionType == 1 { // S_ZEROFILL
-				// Section filled with zeroes on demand.
-				sections = append(sections, memorySection{
-					Address: section.Addr,
-					Size:    uint64(section.Size),
-					Align:   uint64(section.Align),
-					Type:    memoryBSS,
-				})
-			} else if segment.Maxprot&0b011 == 0b001 { // --r (read-only data)
-				// Protection doesn't allow writes, so mark this section read-only.
-				sections = append(sections, memorySection{
-					Address: section.Addr,
-					Size:    uint64(section.Size),
-					Align:   uint64(section.Align),
-					Type:    memoryROData,
-				})
-			} else {
-				// The rest is assumed to be regular data.
-				sections = append(sections, memorySection{
-					Address: section.Addr,
-					Size:    uint64(section.Size),
-					Align:   uint64(section.Align),
-					Type:    memoryData,
-				})
-			}
-		}
-
-		// Read DWARF information.
-		// The data isn't stored directly in the binary as in most executable
-		// formats. Instead, it is left in the object files that were used as a
-		// basis for linking. The executable does however contain STABS debug
-		// information that points to the source object file and is used by
-		// debuggers.
-		// For more information:
-		// http://wiki.dwarfstd.org/index.php?title=Apple%27s_%22Lazy%22_DWARF_Scheme
-		var objSymbolNames map[string]int
-		var objAddresses []addressLine
-		var previousSymbol macho.Symbol
-		for _, symbol := range file.Symtab.Syms {
-			// STABS constants, from mach-o/stab.h:
-			// https://opensource.apple.com/source/xnu/xnu-7195.141.2/EXTERNAL_HEADERS/mach-o/stab.h.auto.html
-			const (
-				N_GSYM  = 0x20
-				N_FUN   = 0x24
-				N_STSYM = 0x26
-				N_SO    = 0x64
-				N_OSO   = 0x66
-			)
-			if symbol.Type == N_OSO {
-				// Found an object file. Now try to parse it.
-				objSymbolNames, objAddresses, err = readMachOSymbolAddresses(symbol.Name)
-				if err != nil && sizesDebug {
-					// Errors are normally ignored. If there is an error, it's
-					// simply treated as that the DWARF is not available.
-					fmt.Fprintf(os.Stderr, "could not read DWARF from file %s: %s\n", symbol.Name, err)
-				}
-			} else if symbol.Type == N_FUN {
-				// Found a function.
-				// The way this is encoded is a bit weird. MachO symbols don't
-				// have a length. What I've found is that the length is encoded
-				// by first having a N_FUN symbol as usual, and then having a
-				// symbol with a zero-length name that has the value not set to
-				// the address of the symbol but to the length. So in order to
-				// get both the address and the length, we look for a symbol
-				// with a name followed by a symbol without a name.
-				if symbol.Name == "" && previousSymbol.Type == N_FUN && previousSymbol.Name != "" {
-					// Functions are encoded as many small chunks in the line
-					// table (one or a few instructions per source line). But
-					// the symbol length covers the whole symbols, over many
-					// lines and possibly including inlined functions. So we
-					// continue to iterate through the objAddresses slice until
-					// we've found all the source lines that are part of this
-					// symbol.
-					address := previousSymbol.Value
-					length := symbol.Value
-					if index, ok := objSymbolNames[previousSymbol.Name]; ok && index >= 0 {
-						for length > 0 {
-							line := objAddresses[index]
-							line.Address = address
-							if line.Length > length {
-								// Line extends beyond the end of te symbol?
-								// Weird, shouldn't happen.
-								break
-							}
-							addresses = append(addresses, line)
-							index++
-							length -= line.Length
-							address += line.Length
-						}
-					}
-				}
-			} else if symbol.Type == N_GSYM || symbol.Type == N_STSYM {
-				// Global variables.
-				if index, ok := objSymbolNames[symbol.Name]; ok {
-					address := objAddresses[index]
-					address.Address = symbol.Value
-					addresses = append(addresses, address)
-				}
-			}
-			previousSymbol = symbol
-		}
-	} else if file, err := pe.NewFile(f); err == nil {
-		// Read DWARF information. The error is intentionally ignored.
-		data, _ := file.DWARF()
-		if data != nil {
-			addresses, err = readProgramSizeFromDWARF(data, 0, 0, true)
-			if err != nil {
-				// However, _do_ report an error here. Something must have gone
-				// wrong while trying to parse DWARF data.
-				return nil, err
-			}
-		}
-
-		// Read COFF sections.
-		optionalHeader := file.OptionalHeader.(*pe.OptionalHeader64)
-		for _, section := range file.Sections {
-			// For more information:
-			// https://docs.microsoft.com/en-us/windows/win32/api/winnt/ns-winnt-image_section_header
-			const (
-				IMAGE_SCN_CNT_CODE             = 0x00000020
-				IMAGE_SCN_CNT_INITIALIZED_DATA = 0x00000040
-				IMAGE_SCN_MEM_DISCARDABLE      = 0x02000000
-				IMAGE_SCN_MEM_READ             = 0x40000000
-				IMAGE_SCN_MEM_WRITE            = 0x80000000
-			)
-			if section.Characteristics&IMAGE_SCN_MEM_DISCARDABLE != 0 {
-				// Debug sections, etc.
-				continue
-			}
-			address := uint64(section.VirtualAddress) + optionalHeader.ImageBase
-			if section.Characteristics&IMAGE_SCN_CNT_CODE != 0 {
-				// .text
-				sections = append(sections, memorySection{
-					Address: address,
-					Size:    uint64(section.VirtualSize),
-					Type:    memoryCode,
-				})
-			} else if section.Characteristics&IMAGE_SCN_CNT_INITIALIZED_DATA != 0 {
-				if section.Characteristics&IMAGE_SCN_MEM_WRITE != 0 {
-					// .data
-					sections = append(sections, memorySection{
-						Address: address,
-						Size:    uint64(section.Size),
-						Type:    memoryData,
-					})
-					if section.Size < section.VirtualSize {
-						// Equivalent of a .bss section.
-						// Note: because of how the PE/COFF format is
-						// structured, not all zero-initialized data is marked
-						// as such. A portion may be at the end of the .data
-						// section and is thus marked as initialized data.
-						sections = append(sections, memorySection{
-							Address: address + uint64(section.Size),
-							Size:    uint64(section.VirtualSize) - uint64(section.Size),
-							Type:    memoryBSS,
-						})
-					}
-				} else if section.Characteristics&IMAGE_SCN_MEM_READ != 0 {
-					// .rdata, .buildid, .pdata
-					sections = append(sections, memorySection{
-						Address: address,
-						Size:    uint64(section.VirtualSize),
-						Type:    memoryROData,
-					})
-				}
-			}
-		}
-	} else if file, err := wasm.Parse(f); err == nil {
-		// File is in WebAssembly format.
-
-		// Put code at a very high address, so that it won't conflict with the
-		// data in the memory section.
-		const codeOffset = 0x8000_0000_0000_0000
-
-		// Read DWARF information. The error is intentionally ignored.
-		data, _ := file.DWARF()
-		if data != nil {
-			addresses, err = readProgramSizeFromDWARF(data, codeOffset, 0, true)
-			if err != nil {
-				// However, _do_ report an error here. Something must have gone
-				// wrong while trying to parse DWARF data.
-				return nil, err
-			}
-		}
-
-		var linearMemorySize uint64
-		for _, section := range file.Sections {
-			switch section := section.(type) {
-			case *wasm.SectionCode:
-				sections = append(sections, memorySection{
-					Address: codeOffset,
-					Size:    uint64(section.Size()),
-					Type:    memoryCode,
-				})
-			case *wasm.SectionMemory:
-				// This value is used when processing *wasm.SectionData (which
-				// always comes after *wasm.SectionMemory).
-				linearMemorySize = uint64(section.Entries[0].Limits.Initial) * 64 * 1024
-			case *wasm.SectionData:
-				// Data sections contain initial values for linear memory.
-				// First load the list of data sections, and sort them by
-				// address for easier processing.
-				var dataSections []memorySection
-				for _, entry := range section.Entries {
-					address, err := wasm.Eval(bytes.NewBuffer(entry.Offset))
-					if err != nil {
-						return nil, fmt.Errorf("could not parse data section address: %w", err)
-					}
-					dataSections = append(dataSections, memorySection{
-						Address: uint64(address[0].(int32)),
-						Size:    uint64(len(entry.Data)),
-						Type:    memoryData,
-					})
-				}
-				sort.Slice(dataSections, func(i, j int) bool {
-					return dataSections[i].Address < dataSections[j].Address
-				})
-
-				// And now add all data sections for linear memory.
-				// Parts that are in the slice of data sections are added as
-				// memoryData, and parts that are not are added as memoryBSS.
-				addr := uint64(0)
-				for _, section := range dataSections {
-					if addr < section.Address {
-						sections = append(sections, memorySection{
-							Address: addr,
-							Size:    section.Address - addr,
-							Type:    memoryBSS,
-						})
-					}
-					if addr > section.Address {
-						// This might be allowed, I'm not sure.
-						// It certainly doesn't make a lot of sense.
-						return nil, fmt.Errorf("overlapping data section")
-					}
-					// addr == section.Address
-					sections = append(sections, section)
-					addr = section.Address + section.Size
-				}
-				if addr < linearMemorySize {
-					sections = append(sections, memorySection{
-						Address: addr,
-						Size:    linearMemorySize - addr,
-						Type:    memoryBSS,
-					})
-				}
-			}
-		}
-	} else {
-		return nil, fmt.Errorf("could not parse file: %w", err)
-	}
-
-	// Sort the slice of address chunks by address, so that we can iterate
-	// through it to calculate section sizes.
-	sort.Slice(addresses, func(i, j int) bool {
-		if addresses[i].Address == addresses[j].Address {
-			// Very rarely, there might be duplicate addresses.
-			// If that happens, sort the largest chunks first.
-			return addresses[i].Length > addresses[j].Length
-		}
-		return addresses[i].Address < addresses[j].Address
-	})
-
-	// Now finally determine the binary/RAM size usage per package by going
-	// through each allocated section.
-	sizes := make(map[string]packageSize)
-	for _, section := range sections {
-		switch section.Type {
-		case memoryCode:
-			readSection(section, addresses, func(path string, size uint64, isVariable bool) {
-				field := sizes[path]
-				if isVariable {
-					field.ROData += size
-				} else {
-					field.Code += size
-				}
-				sizes[path] = field
-			}, packagePathMap)
-		case memoryROData:
-			readSection(section, addresses, func(path string, size uint64, isVariable bool) {
-				field := sizes[path]
-				field.ROData += size
-				sizes[path] = field
-			}, packagePathMap)
-		case memoryData:
-			readSection(section, addresses, func(path string, size uint64, isVariable bool) {
-				field := sizes[path]
-				field.Data += size
-				sizes[path] = field
-			}, packagePathMap)
-		case memoryBSS:
-			readSection(section, addresses, func(path string, size uint64, isVariable bool) {
-				field := sizes[path]
-				field.BSS += size
-				sizes[path] = field
-			}, packagePathMap)
-		case memoryStack:
-			// We store the C stack as a pseudo-package.
-			sizes["C stack"] = packageSize{
-				BSS: section.Size,
-			}
-		}
-	}
-
-	// ...and summarize the results.
-	program := &programSize{
-		Packages: sizes,
-	}
-	for _, pkg := range sizes {
-		program.Code += pkg.Code
-		program.ROData += pkg.ROData
-		program.Data += pkg.Data
-		program.BSS += pkg.BSS
-	}
-	return program, nil
-}
-
-// readSection determines for each byte in this section to which package it
-// belongs. It reports this usage through the addSize callback.
-func readSection(section memorySection, addresses []addressLine, addSize func(string, uint64, bool), packagePathMap map[string]string) {
-	// The addr variable tracks at which address we are while going through this
-	// section. We start at the beginning.
-	addr := section.Address
-	sectionEnd := section.Address + section.Size
-	if sizesDebug {
-		fmt.Printf("%08x..%08x %5d: %s\n", addr, sectionEnd, section.Size, section.Type)
-	}
-	for _, line := range addresses {
-		if line.Address < section.Address || line.Address+line.Length > sectionEnd {
-			// Check that this line is entirely within the section.
-			// Don't bother dealing with line entries that cross sections (that
-			// seems rather unlikely anyway).
-			continue
-		}
-		if addr < line.Address {
-			// There is a gap: there is a space between the current and the
-			// previous line entry.
-			// Check whether this is caused by alignment requirements.
-			addrAligned := (addr + line.Align - 1) &^ (line.Align - 1)
-			if line.Align > 1 && addrAligned >= line.Address {
-				// It is, assume that's what causes the gap.
-				addSize("(padding)", line.Address-addr, true)
-			} else {
-				addSize("(unknown)", line.Address-addr, false)
-				if sizesDebug {
-					fmt.Printf("%08x..%08x %5d:  unknown (gap), alignment=%d\n", addr, line.Address, line.Address-addr, line.Align)
-				}
-			}
-			addr = line.Address
-		}
-		if addr > line.Address+line.Length {
-			// The current line is already covered by a previous line entry.
-			// Simply skip it.
-			continue
-		}
-		// At this point, addr falls within the current line (probably at the
-		// start).
-		length := line.Length
-		if addr > line.Address {
-			// There is some overlap: the previous line entry already covered
-			// part of this line entry. So reduce the length to add to the
-			// remaining bit of the line entry.
-			length = line.Length - (addr - line.Address)
-		}
-		// Finally, mark this chunk of memory as used by the given package.
-		addSize(findPackagePath(line.File, packagePathMap), length, line.IsVariable)
-		addr = line.Address + line.Length
-	}
-	if addr < sectionEnd {
-		// There is a gap at the end of the section.
-		addrAligned := (addr + section.Align - 1) &^ (section.Align - 1)
-		if section.Align > 1 && addrAligned >= sectionEnd {
-			// The gap is caused by the section alignment.
-			// For example, if a .rodata section ends with a non-aligned string.
-			addSize("(padding)", sectionEnd-addr, true)
-		} else {
-			addSize("(unknown)", sectionEnd-addr, false)
-			if sizesDebug {
-				fmt.Printf("%08x..%08x %5d:  unknown (end), alignment=%d\n", addr, sectionEnd, sectionEnd-addr, section.Align)
-			}
-		}
-	}
-}
-
-// findPackagePath returns the Go package (or a pseudo package) for the given
-// path. It uses some heuristics, for example for some C libraries.
-func findPackagePath(path string, packagePathMap map[string]string) string {
-	// Check whether this path is part of one of the compiled packages.
-	packagePath, ok := packagePathMap[filepath.Dir(path)]
-	if !ok {
-		if strings.HasPrefix(path, filepath.Join(goenv.Get("TINYGOROOT"), "lib")) {
-			// Emit C libraries (in the lib subdirectory of TinyGo) as a single
-			// package, with a "C" prefix. For example: "C compiler-rt" for the
-			// compiler runtime library from LLVM.
-			packagePath = "C " + strings.Split(strings.TrimPrefix(path, filepath.Join(goenv.Get("TINYGOROOT"), "lib")), string(os.PathSeparator))[1]
-		} else if strings.HasPrefix(path, filepath.Join(goenv.Get("TINYGOROOT"), "llvm-project")) {
-			packagePath = "C compiler-rt"
-		} else if packageSymbolRegexp.MatchString(path) {
-			// Parse symbol names like main$alloc or runtime$string.
-			packagePath = path[:strings.LastIndex(path, "$")]
-		} else if path == "__isr_vector" {
-			packagePath = "C interrupt vector"
-		} else if path == "<Go type>" {
-			packagePath = "Go types"
-		} else if path == "<Go interface assert>" {
-			// Interface type assert, generated by the interface lowering pass.
-			packagePath = "Go interface assert"
-		} else if path == "<Go interface method>" {
-			// Interface method wrapper (switch over all concrete types),
-			// generated by the interface lowering pass.
-			packagePath = "Go interface method"
-		} else if path == "<stdin>" {
-			// This can happen when the source code (in Go) doesn't have a
-			// source file and uses "-" as the location. Somewhere this is
-			// converted to "<stdin>".
-			// Convert this back to the "-" string. Eventually, this should be
-			// fixed in the compiler.
-			packagePath = "-"
-		} else {
-			// This is some other path. Not sure what it is, so just emit its directory.
-			packagePath = filepath.Dir(path) // fallback
-		}
-	}
-	return packagePath
-}

builder/sizes_test.go

@@ -1,92 +0,0 @@
-package builder
-
-import (
-	"runtime"
-	"testing"
-	"time"
-
-	"github.com/tinygo-org/tinygo/compileopts"
-)
-
-var sema = make(chan struct{}, runtime.NumCPU())
-
-type sizeTest struct {
-	target     string
-	path       string
-	codeSize   uint64
-	rodataSize uint64
-	dataSize   uint64
-	bssSize    uint64
-}
-
-// Test whether code and data size is as expected for the given targets.
-// This tests both the logic of loadProgramSize and checks that code size
-// doesn't change unintentionally.
-//
-// If you find that code or data size is reduced, then great! You can reduce the
-// number in this test.
-// If you find that the code or data size is increased, take a look as to why
-// this is. It could be due to an update (LLVM version, Go version, etc) which
-// is fine, but it could also mean that a recent change introduced this size
-// increase. If so, please consider whether this new feature is indeed worth the
-// size increase for all users.
-func TestBinarySize(t *testing.T) {
-	if runtime.GOOS == "linux" && !hasBuiltinTools {
-		// Debian LLVM packages are modified a bit and tend to produce
-		// different machine code. Ideally we'd fix this (with some attributes
-		// or something?), but for now skip it.
-		t.Skip("Skip: using external LLVM version so binary size might differ")
-	}
-
-	// This is a small number of very diverse targets that we want to test.
-	tests := []sizeTest{
-		// microcontrollers
-		{"hifive1b", "examples/echo", 4556, 272, 0, 2252},
-		{"microbit", "examples/serial", 2680, 380, 8, 2256},
-		{"wioterminal", "examples/pininterrupt", 6109, 1471, 116, 6816},
-
-		// TODO: also check wasm. Right now this is difficult, because
-		// wasm binaries are run through wasm-opt and therefore the
-		// output varies by binaryen version.
-	}
-	for _, tc := range tests {
-		tc := tc
-		t.Run(tc.target+"/"+tc.path, func(t *testing.T) {
-			t.Parallel()
-
-			// Build the binary.
-			options := compileopts.Options{
-				Target:        tc.target,
-				Opt:           "z",
-				Semaphore:     sema,
-				InterpTimeout: 60 * time.Second,
-				Debug:         true,
-				VerifyIR:      true,
-			}
-			target, err := compileopts.LoadTarget(&options)
-			if err != nil {
-				t.Fatal("could not load target:", err)
-			}
-			config := &compileopts.Config{
-				Options: &options,
-				Target:  target,
-			}
-			result, err := Build(tc.path, "", t.TempDir(), config)
-			if err != nil {
-				t.Fatal("could not build:", err)
-			}
-
-			// Check whether the size of the binary matches the expected size.
-			sizes, err := loadProgramSize(result.Executable, nil)
-			if err != nil {
-				t.Fatal("could not read program size:", err)
-			}
-			if sizes.Code != tc.codeSize || sizes.ROData != tc.rodataSize || sizes.Data != tc.dataSize || sizes.BSS != tc.bssSize {
-				t.Errorf("Unexpected code size when compiling: -target=%s %s", tc.target, tc.path)
-				t.Errorf("            code rodata   data    bss")
-				t.Errorf("expected: %6d %6d %6d %6d", tc.codeSize, tc.rodataSize, tc.dataSize, tc.bssSize)
-				t.Errorf("actual:   %6d %6d %6d %6d", sizes.Code, sizes.ROData, sizes.Data, sizes.BSS)
-			}
-		})
-	}
-}

builder/tools-builtin.go

@@ -1,74 +0,0 @@
-//go:build byollvm
-
-package builder
-
-import (
-	"errors"
-	"unsafe"
-)
-
-/*
-#cgo CXXFLAGS: -fno-rtti
-#include <stdbool.h>
-#include <stdlib.h>
-bool tinygo_clang_driver(int argc, char **argv);
-bool tinygo_link_elf(int argc, char **argv);
-bool tinygo_link_macho(int argc, char **argv);
-bool tinygo_link_mingw(int argc, char **argv);
-bool tinygo_link_wasm(int argc, char **argv);
-*/
-import "C"
-
-const hasBuiltinTools = true
-
-// RunTool runs the given tool (such as clang).
-//
-// This version actually runs the tools because TinyGo was compiled while
-// linking statically with LLVM (with the byollvm build tag).
-func RunTool(tool string, args ...string) error {
-	linker := "elf"
-	if tool == "ld.lld" && len(args) >= 2 {
-		if args[0] == "-m" && (args[1] == "i386pep" || args[1] == "arm64pe") {
-			linker = "mingw"
-		} else if args[0] == "-flavor" {
-			linker = args[1]
-			args = args[2:]
-		}
-	}
-	args = append([]string{"tinygo:" + tool}, args...)
-
-	var cflag *C.char
-	buf := C.calloc(C.size_t(len(args)), C.size_t(unsafe.Sizeof(cflag)))
-	defer C.free(buf)
-	cflags := (*[1 << 10]*C.char)(unsafe.Pointer(buf))[:len(args):len(args)]
-	for i, flag := range args {
-		cflag := C.CString(flag)
-		cflags[i] = cflag
-		defer C.free(unsafe.Pointer(cflag))
-	}
-
-	var ok C.bool
-	switch tool {
-	case "clang":
-		ok = C.tinygo_clang_driver(C.int(len(args)), (**C.char)(buf))
-	case "ld.lld":
-		switch linker {
-		case "darwin":
-			ok = C.tinygo_link_macho(C.int(len(args)), (**C.char)(buf))
-		case "elf":
-			ok = C.tinygo_link_elf(C.int(len(args)), (**C.char)(buf))
-		case "mingw":
-			ok = C.tinygo_link_mingw(C.int(len(args)), (**C.char)(buf))
-		default:
-			return errors.New("unknown linker: " + linker)
-		}
-	case "wasm-ld":
-		ok = C.tinygo_link_wasm(C.int(len(args)), (**C.char)(buf))
-	default:
-		return errors.New("unknown tool: " + tool)
-	}
-	if !ok {
-		return errors.New("failed to run tool: " + tool)
-	}
-	return nil
-}

builder/tools-external.go

@@ -1,15 +0,0 @@
-//go:build !byollvm
-
-package builder
-
-import "errors"
-
-const hasBuiltinTools = false
-
-// RunTool runs the given tool (such as clang).
-//
-// This version doesn't actually run the tool: TinyGo has not been compiled by
-// statically linking to LLVM.
-func RunTool(tool string, args ...string) error {
-	return errors.New("cannot run tool: " + tool)
-}

builder/tools.go

@@ -1,50 +0,0 @@
-package builder
-
-import (
-	"errors"
-	"os"
-	"os/exec"
-
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-// runCCompiler invokes a C compiler with the given arguments.
-func runCCompiler(flags ...string) error {
-	if hasBuiltinTools {
-		// Compile this with the internal Clang compiler.
-		headerPath := getClangHeaderPath(goenv.Get("TINYGOROOT"))
-		if headerPath == "" {
-			return errors.New("could not locate Clang headers")
-		}
-		flags = append(flags, "-I"+headerPath)
-		cmd := exec.Command(os.Args[0], append([]string{"clang"}, flags...)...)
-		cmd.Stdout = os.Stdout
-		cmd.Stderr = os.Stderr
-		return cmd.Run()
-	}
-
-	// Compile this with an external invocation of the Clang compiler.
-	return execCommand("clang", flags...)
-}
-
-// link invokes a linker with the given name and flags.
-func link(linker string, flags ...string) error {
-	if hasBuiltinTools && (linker == "ld.lld" || linker == "wasm-ld") {
-		// Run command with internal linker.
-		cmd := exec.Command(os.Args[0], append([]string{linker}, flags...)...)
-		cmd.Stdout = os.Stdout
-		cmd.Stderr = os.Stderr
-		return cmd.Run()
-	}
-
-	// Fall back to external command.
-	if _, ok := commands[linker]; ok {
-		return execCommand(linker, flags...)
-	}
-
-	cmd := exec.Command(linker, flags...)
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	cmd.Dir = goenv.Get("TINYGOROOT")
-	return cmd.Run()
-}

builder/uf2.go

@@ -1,153 +0,0 @@
-package builder
-
-// This file converts firmware files from BIN to UF2 format before flashing.
-//
-// For more information about the UF2 firmware file format, please see:
-// https://github.com/Microsoft/uf2
-//
-//
-
-import (
-	"bytes"
-	"encoding/binary"
-	"os"
-	"strconv"
-)
-
-// convertELFFileToUF2File converts an ELF file to a UF2 file.
-func convertELFFileToUF2File(infile, outfile string, uf2FamilyID string) error {
-	// Read the .text segment.
-	targetAddress, data, err := extractROM(infile)
-	if err != nil {
-		return err
-	}
-
-	output, _, err := convertBinToUF2(data, uint32(targetAddress), uf2FamilyID)
-	if err != nil {
-		return err
-	}
-	return os.WriteFile(outfile, output, 0644)
-}
-
-// convertBinToUF2 converts the binary bytes in input to UF2 formatted data.
-func convertBinToUF2(input []byte, targetAddr uint32, uf2FamilyID string) ([]byte, int, error) {
-	blocks := split(input, 256)
-	output := make([]byte, 0)
-
-	bl, err := newUF2Block(targetAddr, uf2FamilyID)
-	if err != nil {
-		return nil, 0, err
-	}
-	bl.SetNumBlocks(len(blocks))
-
-	for i := 0; i < len(blocks); i++ {
-		bl.SetBlockNo(i)
-		bl.SetData(blocks[i])
-
-		output = append(output, bl.Bytes()...)
-		bl.IncrementAddress(bl.payloadSize)
-	}
-
-	return output, len(blocks), nil
-}
-
-const (
-	uf2MagicStart0 = 0x0A324655 // "UF2\n"
-	uf2MagicStart1 = 0x9E5D5157 // Randomly selected
-	uf2MagicEnd    = 0x0AB16F30 // Ditto
-)
-
-// uf2Block is the structure used for each UF2 code block sent to device.
-type uf2Block struct {
-	magicStart0 uint32
-	magicStart1 uint32
-	flags       uint32
-	targetAddr  uint32
-	payloadSize uint32
-	blockNo     uint32
-	numBlocks   uint32
-	familyID    uint32
-	data        []uint8
-	magicEnd    uint32
-}
-
-// newUF2Block returns a new uf2Block struct that has been correctly populated
-func newUF2Block(targetAddr uint32, uf2FamilyID string) (*uf2Block, error) {
-	var flags uint32
-	var familyID uint32
-	if uf2FamilyID != "" {
-		flags |= flagFamilyIDPresent
-		v, err := strconv.ParseUint(uf2FamilyID, 0, 32)
-		if err != nil {
-			return nil, err
-		}
-		familyID = uint32(v)
-	}
-	return &uf2Block{magicStart0: uf2MagicStart0,
-		magicStart1: uf2MagicStart1,
-		magicEnd:    uf2MagicEnd,
-		targetAddr:  targetAddr,
-		flags:       flags,
-		familyID:    familyID,
-		payloadSize: 256,
-		data:        make([]byte, 476),
-	}, nil
-}
-
-const (
-	flagFamilyIDPresent = 0x00002000
-)
-
-// Bytes converts the uf2Block to a slice of bytes that can be written to file.
-func (b *uf2Block) Bytes() []byte {
-	buf := bytes.NewBuffer(make([]byte, 0, 512))
-	binary.Write(buf, binary.LittleEndian, b.magicStart0)
-	binary.Write(buf, binary.LittleEndian, b.magicStart1)
-	binary.Write(buf, binary.LittleEndian, b.flags)
-	binary.Write(buf, binary.LittleEndian, b.targetAddr)
-	binary.Write(buf, binary.LittleEndian, b.payloadSize)
-	binary.Write(buf, binary.LittleEndian, b.blockNo)
-	binary.Write(buf, binary.LittleEndian, b.numBlocks)
-	binary.Write(buf, binary.LittleEndian, b.familyID)
-	binary.Write(buf, binary.LittleEndian, b.data)
-	binary.Write(buf, binary.LittleEndian, b.magicEnd)
-
-	return buf.Bytes()
-}
-
-// IncrementAddress moves the target address pointer forward by count bytes.
-func (b *uf2Block) IncrementAddress(count uint32) {
-	b.targetAddr += b.payloadSize
-}
-
-// SetData sets the data to be used for the current block.
-func (b *uf2Block) SetData(d []byte) {
-	b.data = make([]byte, 476)
-	copy(b.data[:], d)
-}
-
-// SetBlockNo sets the current block number to be used.
-func (b *uf2Block) SetBlockNo(bn int) {
-	b.blockNo = uint32(bn)
-}
-
-// SetNumBlocks sets the total number of blocks for this UF2 file.
-func (b *uf2Block) SetNumBlocks(total int) {
-	b.numBlocks = uint32(total)
-}
-
-// split splits a slice of bytes into a slice of byte slices of a specific size limit.
-func split(input []byte, limit int) [][]byte {
-	var block []byte
-	output := make([][]byte, 0, len(input)/limit+1)
-	for len(input) >= limit {
-		// add all blocks
-		block, input = input[:limit], input[limit:]
-		output = append(output, block)
-	}
-	if len(input) > 0 {
-		// add remaining block (that isn't full sized)
-		output = append(output, input)
-	}
-	return output
-}

builtins.go

@@ -1,11 +1,11 @@
-package builder
+package main
 
 import (
+	"io/ioutil"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"strings"
-
-	"github.com/tinygo-org/tinygo/goenv"
 )
 
 // These are the GENERIC_SOURCES according to CMakeList.txt.
@@ -40,6 +40,7 @@ var genericBuiltins = []string{
 	"divdf3.c",
 	"divdi3.c",
 	"divmoddi4.c",
+	"divmodsi4.c",
 	"divsc3.c",
 	"divsf3.c",
 	"divsi3.c",
@@ -75,7 +76,6 @@ var genericBuiltins = []string{
 	"floatunsisf.c",
 	"floatuntidf.c",
 	"floatuntisf.c",
-	"fp_mode.c",
 	//"int_util.c",
 	"lshrdi3.c",
 	"lshrti3.c",
@@ -126,6 +126,7 @@ var genericBuiltins = []string{
 	"ucmpti2.c",
 	"udivdi3.c",
 	"udivmoddi4.c",
+	"udivmodsi4.c",
 	"udivmodti4.c",
 	"udivsi3.c",
 	"udivti3.c",
@@ -152,52 +153,68 @@ var aeabiBuiltins = []string{
 	"arm/aeabi_memset.S",
 	"arm/aeabi_uidivmod.S",
 	"arm/aeabi_uldivmod.S",
-
-	// These two are not technically EABI builtins but are used by them and only
-	// seem to be used on ARM. LLVM seems to use __divsi3 and __modsi3 on most
-	// other architectures.
-	// Most importantly, they have a different calling convention on AVR so
-	// should not be used on AVR.
-	"divmodsi4.c",
-	"udivmodsi4.c",
 }
 
-var avrBuiltins = []string{
-	"avr/divmodhi4.S",
-	"avr/divmodqi4.S",
-	"avr/mulhi3.S",
-	"avr/mulqi3.S",
-	"avr/udivmodhi4.S",
-	"avr/udivmodqi4.S",
+func builtinFiles(target string) []string {
+	builtins := append([]string{}, genericBuiltins...) // copy genericBuiltins
+	if target[:3] == "arm" {
+		builtins = append(builtins, aeabiBuiltins...)
+	}
+	return builtins
 }
 
-// CompilerRT is a library with symbols required by programs compiled with LLVM.
-// These symbols are for operations that cannot be emitted with a single
-// instruction or a short sequence of instructions for that target.
-//
-// For more information, see: https://compiler-rt.llvm.org/
-var CompilerRT = Library{
-	name: "compiler-rt",
-	cflags: func(target, headerPath string) []string {
-		return []string{"-Werror", "-Wall", "-std=c11", "-nostdlibinc"}
-	},
-	sourceDir: func() string {
-		llvmDir := filepath.Join(goenv.Get("TINYGOROOT"), "llvm-project/compiler-rt/lib/builtins")
-		if _, err := os.Stat(llvmDir); err == nil {
-			// Release build.
-			return llvmDir
+// Get the builtins archive, possibly generating it as needed.
+func loadBuiltins(target string) (path string, err error) {
+	outfile := "librt-" + target + ".a"
+	builtinsDir := filepath.Join(sourceDir(), "lib", "compiler-rt", "lib", "builtins")
+
+	builtins := builtinFiles(target)
+	srcs := make([]string, len(builtins))
+	for i, name := range builtins {
+		srcs[i] = filepath.Join(builtinsDir, name)
+	}
+
+	if path, err := cacheLoad(outfile, commands["clang"], srcs); path != "" || err != nil {
+		return path, err
+	}
+
+	dir, err := ioutil.TempDir("", "tinygo-builtins")
+	if err != nil {
+		return "", err
+	}
+	defer os.RemoveAll(dir)
+
+	// Compile all builtins.
+	// TODO: use builtins optimized for a given target if available.
+	objs := make([]string, 0, len(builtins))
+	for _, name := range builtins {
+		objname := name
+		if strings.LastIndexByte(objname, '/') >= 0 {
+			objname = objname[strings.LastIndexByte(objname, '/'):]
 		}
-		// Development build.
-		return filepath.Join(goenv.Get("TINYGOROOT"), "lib/compiler-rt-builtins")
-	},
-	librarySources: func(target string) ([]string, error) {
-		builtins := append([]string{}, genericBuiltins...) // copy genericBuiltins
-		if strings.HasPrefix(target, "arm") || strings.HasPrefix(target, "thumb") {
-			builtins = append(builtins, aeabiBuiltins...)
+		objpath := filepath.Join(dir, objname+".o")
+		objs = append(objs, objpath)
+		srcpath := filepath.Join(builtinsDir, name)
+		cmd := exec.Command(commands["clang"], "-c", "-Oz", "-g", "-Werror", "-Wall", "-std=c11", "-fshort-enums", "-nostdlibinc", "-ffunction-sections", "-fdata-sections", "--target="+target, "-o", objpath, srcpath)
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+		cmd.Dir = dir
+		err = cmd.Run()
+		if err != nil {
+			return "", err
 		}
-		if strings.HasPrefix(target, "avr") {
-			builtins = append(builtins, avrBuiltins...)
-		}
-		return builtins, nil
-	},
+	}
+
+	// Put all builtins in an archive to link as a static library.
+	arpath := filepath.Join(dir, "librt.a")
+	cmd := exec.Command(commands["ar"], append([]string{"cr", arpath}, objs...)...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Dir = dir
+	err = cmd.Run()
+	if err != nil {
+		return "", err
+	}
+
+	return cacheStore(arpath, outfile, commands["clang"], srcs)
 }

cgo/cgo_test.go

@@ -1,228 +0,0 @@
-package cgo
-
-import (
-	"bytes"
-	"flag"
-	"fmt"
-	"go/ast"
-	"go/format"
-	"go/parser"
-	"go/token"
-	"go/types"
-	"os"
-	"path/filepath"
-	"regexp"
-	"runtime"
-	"strings"
-	"testing"
-)
-
-// Pass -update to go test to update the output of the test files.
-var flagUpdate = flag.Bool("update", false, "Update images based on test output.")
-
-// normalizeResult normalizes Go source code that comes out of tests across
-// platforms and Go versions.
-func normalizeResult(t *testing.T, result string) string {
-	result = strings.ReplaceAll(result, "\r\n", "\n")
-
-	// This changed to 'undefined:', in Go 1.20.
-	result = strings.ReplaceAll(result, ": undeclared name:", ": undefined:")
-	// Go 1.20 added a bit more detail
-	result = regexp.MustCompile(`(unknown field z in struct literal).*`).ReplaceAllString(result, "$1")
-
-	return result
-}
-
-func TestCGo(t *testing.T) {
-	var cflags = []string{"--target=armv6m-unknown-unknown-eabi"}
-
-	for _, name := range []string{
-		"basic",
-		"errors",
-		"types",
-		"symbols",
-		"flags",
-		"const",
-	} {
-		name := name // avoid a race condition
-		t.Run(name, func(t *testing.T) {
-			// Read the AST in memory.
-			path := filepath.Join("testdata", name+".go")
-			fset := token.NewFileSet()
-			f, err := parser.ParseFile(fset, path, nil, parser.ParseComments)
-			if err != nil {
-				t.Fatal("could not parse Go source file:", err)
-			}
-
-			// Process the AST with CGo.
-			cgoAST, _, _, _, _, cgoErrors := Process([]*ast.File{f}, "testdata", "main", fset, cflags, "")
-
-			// Check the AST for type errors.
-			var typecheckErrors []error
-			config := types.Config{
-				Error: func(err error) {
-					typecheckErrors = append(typecheckErrors, err)
-				},
-				Importer: simpleImporter{},
-				Sizes:    types.SizesFor("gccgo", "arm"),
-			}
-			_, err = config.Check("", fset, []*ast.File{f, cgoAST}, nil)
-			if err != nil && len(typecheckErrors) == 0 {
-				// Only report errors when no type errors are found (an
-				// unexpected condition).
-				t.Error(err)
-			}
-
-			// Store the (formatted) output in a buffer. Format it, so it
-			// becomes easier to read (and will hopefully change less with CGo
-			// changes).
-			buf := &bytes.Buffer{}
-			if len(cgoErrors) != 0 {
-				buf.WriteString("// CGo errors:\n")
-				for _, err := range cgoErrors {
-					buf.WriteString(formatDiagnostic(err))
-				}
-				buf.WriteString("\n")
-			}
-			if len(typecheckErrors) != 0 {
-				buf.WriteString("// Type checking errors after CGo processing:\n")
-				for _, err := range typecheckErrors {
-					buf.WriteString(formatDiagnostic(err))
-				}
-				buf.WriteString("\n")
-			}
-			err = format.Node(buf, fset, cgoAST)
-			if err != nil {
-				t.Errorf("could not write out CGo AST: %v", err)
-			}
-			actual := normalizeResult(t, buf.String())
-
-			// Read the file with the expected output, to compare against.
-			outfile := filepath.Join("testdata", name+".out.go")
-			expectedBytes, err := os.ReadFile(outfile)
-			if err != nil {
-				t.Fatalf("could not read expected output: %v", err)
-			}
-			expected := strings.ReplaceAll(string(expectedBytes), "\r\n", "\n")
-
-			// Check whether the output is as expected.
-			if expected != actual {
-				// It is not. Test failed.
-				if *flagUpdate {
-					// Update the file with the expected data.
-					err := os.WriteFile(outfile, []byte(actual), 0666)
-					if err != nil {
-						t.Error("could not write updated output file:", err)
-					}
-					return
-				}
-				t.Errorf("output did not match:\n%s", string(actual))
-			}
-		})
-	}
-}
-
-func Test_cgoPackage_isEquivalentAST(t *testing.T) {
-	fieldA := &ast.Field{Type: &ast.BasicLit{Kind: token.STRING, Value: "a"}}
-	fieldB := &ast.Field{Type: &ast.BasicLit{Kind: token.STRING, Value: "b"}}
-	listOfFieldA := &ast.FieldList{List: []*ast.Field{fieldA}}
-	listOfFieldB := &ast.FieldList{List: []*ast.Field{fieldB}}
-	funcDeclA := &ast.FuncDecl{Name: &ast.Ident{Name: "a"}, Type: &ast.FuncType{Params: &ast.FieldList{}, Results: listOfFieldA}}
-	funcDeclB := &ast.FuncDecl{Name: &ast.Ident{Name: "b"}, Type: &ast.FuncType{Params: &ast.FieldList{}, Results: listOfFieldB}}
-	funcDeclNoResults := &ast.FuncDecl{Name: &ast.Ident{Name: "C"}, Type: &ast.FuncType{Params: &ast.FieldList{}}}
-
-	testCases := []struct {
-		name     string
-		a, b     ast.Node
-		expected bool
-	}{
-		{
-			name:     "both nil",
-			expected: true,
-		},
-		{
-			name:     "not same type",
-			a:        fieldA,
-			b:        &ast.FuncDecl{},
-			expected: false,
-		},
-		{
-			name:     "Field same",
-			a:        fieldA,
-			b:        fieldA,
-			expected: true,
-		},
-		{
-			name:     "Field different",
-			a:        fieldA,
-			b:        fieldB,
-			expected: false,
-		},
-		{
-			name:     "FuncDecl Type Results nil",
-			a:        funcDeclNoResults,
-			b:        funcDeclNoResults,
-			expected: true,
-		},
-		{
-			name:     "FuncDecl Type Results same",
-			a:        funcDeclA,
-			b:        funcDeclA,
-			expected: true,
-		},
-		{
-			name:     "FuncDecl Type Results different",
-			a:        funcDeclA,
-			b:        funcDeclB,
-			expected: false,
-		},
-		{
-			name:     "FuncDecl Type Results a nil",
-			a:        funcDeclNoResults,
-			b:        funcDeclB,
-			expected: false,
-		},
-		{
-			name:     "FuncDecl Type Results b nil",
-			a:        funcDeclA,
-			b:        funcDeclNoResults,
-			expected: false,
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			p := &cgoPackage{}
-			if got := p.isEquivalentAST(tc.a, tc.b); tc.expected != got {
-				t.Errorf("expected %v, got %v", tc.expected, got)
-			}
-		})
-	}
-}
-
-// simpleImporter implements the types.Importer interface, but only allows
-// importing the unsafe package.
-type simpleImporter struct {
-}
-
-// Import implements the Importer interface. For testing usage only: it only
-// supports importing the unsafe package.
-func (i simpleImporter) Import(path string) (*types.Package, error) {
-	switch path {
-	case "unsafe":
-		return types.Unsafe, nil
-	default:
-		return nil, fmt.Errorf("importer not implemented for package %s", path)
-	}
-}
-
-// formatDiagnostics formats the error message to be an indented comment. It
-// also fixes Windows path name issues (backward slashes).
-func formatDiagnostic(err error) string {
-	msg := err.Error()
-	if runtime.GOOS == "windows" {
-		// Fix Windows path slashes.
-		msg = strings.ReplaceAll(msg, "testdata\\", "testdata/")
-	}
-	return "//     " + msg + "\n"
-}

cgo/const.go

@@ -1,331 +0,0 @@
-package cgo
-
-// This file implements a parser of a subset of the C language, just enough to
-// parse common #define statements to Go constant expressions.
-
-import (
-	"fmt"
-	"go/ast"
-	"go/scanner"
-	"go/token"
-	"strings"
-)
-
-var (
-	prefixParseFns map[token.Token]func(*tokenizer) (ast.Expr, *scanner.Error)
-	precedences    = map[token.Token]int{
-		token.OR:  precedenceOr,
-		token.XOR: precedenceXor,
-		token.AND: precedenceAnd,
-		token.ADD: precedenceAdd,
-		token.SUB: precedenceAdd,
-		token.MUL: precedenceMul,
-		token.QUO: precedenceMul,
-		token.REM: precedenceMul,
-	}
-)
-
-const (
-	precedenceLowest = iota + 1
-	precedenceOr
-	precedenceXor
-	precedenceAnd
-	precedenceAdd
-	precedenceMul
-	precedencePrefix
-)
-
-func init() {
-	// This must be done in an init function to avoid an initialization order
-	// failure.
-	prefixParseFns = map[token.Token]func(*tokenizer) (ast.Expr, *scanner.Error){
-		token.IDENT:  parseIdent,
-		token.INT:    parseBasicLit,
-		token.FLOAT:  parseBasicLit,
-		token.STRING: parseBasicLit,
-		token.CHAR:   parseBasicLit,
-		token.LPAREN: parseParenExpr,
-		token.SUB:    parseUnaryExpr,
-	}
-}
-
-// parseConst parses the given string as a C constant.
-func parseConst(pos token.Pos, fset *token.FileSet, value string) (ast.Expr, *scanner.Error) {
-	t := newTokenizer(pos, fset, value)
-	expr, err := parseConstExpr(t, precedenceLowest)
-	t.Next()
-	if t.curToken != token.EOF {
-		return nil, &scanner.Error{
-			Pos: t.fset.Position(t.curPos),
-			Msg: "unexpected token " + t.curToken.String() + ", expected end of expression",
-		}
-	}
-	return expr, err
-}
-
-// parseConstExpr parses a stream of C tokens to a Go expression.
-func parseConstExpr(t *tokenizer, precedence int) (ast.Expr, *scanner.Error) {
-	if t.curToken == token.EOF {
-		return nil, &scanner.Error{
-			Pos: t.fset.Position(t.curPos),
-			Msg: "empty constant",
-		}
-	}
-	prefix := prefixParseFns[t.curToken]
-	if prefix == nil {
-		return nil, &scanner.Error{
-			Pos: t.fset.Position(t.curPos),
-			Msg: fmt.Sprintf("unexpected token %s", t.curToken),
-		}
-	}
-	leftExpr, err := prefix(t)
-
-	for t.peekToken != token.EOF && precedence < precedences[t.peekToken] {
-		switch t.peekToken {
-		case token.OR, token.XOR, token.AND, token.ADD, token.SUB, token.MUL, token.QUO, token.REM:
-			t.Next()
-			leftExpr, err = parseBinaryExpr(t, leftExpr)
-		}
-	}
-
-	return leftExpr, err
-}
-
-func parseIdent(t *tokenizer) (ast.Expr, *scanner.Error) {
-	return &ast.Ident{
-		NamePos: t.curPos,
-		Name:    "C." + t.curValue,
-	}, nil
-}
-
-func parseBasicLit(t *tokenizer) (ast.Expr, *scanner.Error) {
-	return &ast.BasicLit{
-		ValuePos: t.curPos,
-		Kind:     t.curToken,
-		Value:    t.curValue,
-	}, nil
-}
-
-func parseParenExpr(t *tokenizer) (ast.Expr, *scanner.Error) {
-	lparen := t.curPos
-	t.Next()
-	x, err := parseConstExpr(t, precedenceLowest)
-	if err != nil {
-		return nil, err
-	}
-	t.Next()
-	if t.curToken != token.RPAREN {
-		return nil, unexpectedToken(t, token.RPAREN)
-	}
-	expr := &ast.ParenExpr{
-		Lparen: lparen,
-		X:      x,
-		Rparen: t.curPos,
-	}
-	return expr, nil
-}
-
-func parseBinaryExpr(t *tokenizer, left ast.Expr) (ast.Expr, *scanner.Error) {
-	expression := &ast.BinaryExpr{
-		X:     left,
-		Op:    t.curToken,
-		OpPos: t.curPos,
-	}
-	precedence := precedences[t.curToken]
-	t.Next()
-	right, err := parseConstExpr(t, precedence)
-	expression.Y = right
-	return expression, err
-}
-
-func parseUnaryExpr(t *tokenizer) (ast.Expr, *scanner.Error) {
-	expression := &ast.UnaryExpr{
-		OpPos: t.curPos,
-		Op:    t.curToken,
-	}
-	t.Next()
-	x, err := parseConstExpr(t, precedencePrefix)
-	expression.X = x
-	return expression, err
-}
-
-// unexpectedToken returns an error of the form "unexpected token FOO, expected
-// BAR".
-func unexpectedToken(t *tokenizer, expected token.Token) *scanner.Error {
-	return &scanner.Error{
-		Pos: t.fset.Position(t.curPos),
-		Msg: fmt.Sprintf("unexpected token %s, expected %s", t.curToken, expected),
-	}
-}
-
-// tokenizer reads C source code and converts it to Go tokens.
-type tokenizer struct {
-	curPos, peekPos     token.Pos
-	fset                *token.FileSet
-	curToken, peekToken token.Token
-	curValue, peekValue string
-	buf                 string
-}
-
-// newTokenizer initializes a new tokenizer, positioned at the first token in
-// the string.
-func newTokenizer(start token.Pos, fset *token.FileSet, buf string) *tokenizer {
-	t := &tokenizer{
-		peekPos:   start,
-		fset:      fset,
-		buf:       buf,
-		peekToken: token.ILLEGAL,
-	}
-	// Parse the first two tokens (cur and peek).
-	t.Next()
-	t.Next()
-	return t
-}
-
-// Next consumes the next token in the stream. There is no return value, read
-// the next token from the pos, token and value properties.
-func (t *tokenizer) Next() {
-	// The previous peek is now the current token.
-	t.curPos = t.peekPos
-	t.curToken = t.peekToken
-	t.curValue = t.peekValue
-
-	// Parse the next peek token.
-	t.peekPos += token.Pos(len(t.curValue))
-	for {
-		if len(t.buf) == 0 {
-			t.peekToken = token.EOF
-			return
-		}
-		c := t.buf[0]
-		switch {
-		case c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v':
-			// Skip whitespace.
-			// Based on this source, not sure whether it represents C whitespace:
-			// https://en.cppreference.com/w/cpp/string/byte/isspace
-			t.peekPos++
-			t.buf = t.buf[1:]
-		case len(t.buf) >= 2 && (string(t.buf[:2]) == "||" || string(t.buf[:2]) == "&&"):
-			// Two-character tokens.
-			switch c {
-			case '&':
-				t.peekToken = token.LAND
-			case '|':
-				t.peekToken = token.LOR
-			}
-			t.peekValue = t.buf[:2]
-			t.buf = t.buf[2:]
-			return
-		case c == '(' || c == ')' || c == '+' || c == '-' || c == '*' || c == '/' || c == '%' || c == '&' || c == '|' || c == '^':
-			// Single-character tokens.
-			// TODO: ++ (increment) and -- (decrement) operators.
-			switch c {
-			case '(':
-				t.peekToken = token.LPAREN
-			case ')':
-				t.peekToken = token.RPAREN
-			case '+':
-				t.peekToken = token.ADD
-			case '-':
-				t.peekToken = token.SUB
-			case '*':
-				t.peekToken = token.MUL
-			case '/':
-				t.peekToken = token.QUO
-			case '%':
-				t.peekToken = token.REM
-			case '&':
-				t.peekToken = token.AND
-			case '|':
-				t.peekToken = token.OR
-			case '^':
-				t.peekToken = token.XOR
-			}
-			t.peekValue = t.buf[:1]
-			t.buf = t.buf[1:]
-			return
-		case c >= '0' && c <= '9':
-			// Numeric constant (int, float, etc.).
-			// Find the last non-numeric character.
-			tokenLen := len(t.buf)
-			hasDot := false
-			for i, c := range t.buf {
-				if c == '.' {
-					hasDot = true
-				}
-				if c >= '0' && c <= '9' || c == '.' || c == '_' || c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' {
-					tokenLen = i + 1
-				} else {
-					break
-				}
-			}
-			t.peekValue = t.buf[:tokenLen]
-			t.buf = t.buf[tokenLen:]
-			if hasDot {
-				// Integer constants are more complicated than this but this is
-				// a close approximation.
-				// https://en.cppreference.com/w/cpp/language/integer_literal
-				t.peekToken = token.FLOAT
-				t.peekValue = strings.TrimRight(t.peekValue, "f")
-			} else {
-				t.peekToken = token.INT
-				t.peekValue = strings.TrimRight(t.peekValue, "uUlL")
-			}
-			return
-		case c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z' || c == '_':
-			// Identifier. Find all remaining tokens that are part of this
-			// identifier.
-			tokenLen := len(t.buf)
-			for i, c := range t.buf {
-				if c >= '0' && c <= '9' || c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z' || c == '_' {
-					tokenLen = i + 1
-				} else {
-					break
-				}
-			}
-			t.peekValue = t.buf[:tokenLen]
-			t.buf = t.buf[tokenLen:]
-			t.peekToken = token.IDENT
-			return
-		case c == '"':
-			// String constant. Find the first '"' character that is not
-			// preceded by a backslash.
-			escape := false
-			tokenLen := len(t.buf)
-			for i, c := range t.buf {
-				if i != 0 && c == '"' && !escape {
-					tokenLen = i + 1
-					break
-				}
-				if !escape {
-					escape = c == '\\'
-				}
-			}
-			t.peekToken = token.STRING
-			t.peekValue = t.buf[:tokenLen]
-			t.buf = t.buf[tokenLen:]
-			return
-		case c == '\'':
-			// Char (rune) constant. Find the first '\'' character that is not
-			// preceded by a backslash.
-			escape := false
-			tokenLen := len(t.buf)
-			for i, c := range t.buf {
-				if i != 0 && c == '\'' && !escape {
-					tokenLen = i + 1
-					break
-				}
-				if !escape {
-					escape = c == '\\'
-				}
-			}
-			t.peekToken = token.CHAR
-			t.peekValue = t.buf[:tokenLen]
-			t.buf = t.buf[tokenLen:]
-			return
-		default:
-			t.peekToken = token.ILLEGAL
-			return
-		}
-	}
-}

cgo/const_test.go

@@ -1,81 +0,0 @@
-package cgo
-
-import (
-	"bytes"
-	"go/format"
-	"go/token"
-	"strings"
-	"testing"
-)
-
-func TestParseConst(t *testing.T) {
-	// Test converting a C constant to a Go constant.
-	for _, tc := range []struct {
-		C  string
-		Go string
-	}{
-		{`5`, `5`},
-		{`(5)`, `(5)`},
-		{`(((5)))`, `(5)`},
-		{`)`, `error: 1:1: unexpected token )`},
-		{`5)`, `error: 1:2: unexpected token ), expected end of expression`},
-		{"  \t)", `error: 1:4: unexpected token )`},
-		{`5.8f`, `5.8`},
-		{`foo`, `C.foo`},
-		{``, `error: 1:1: empty constant`}, // empty constants not allowed in Go
-		{`"foo"`, `"foo"`},
-		{`"a\\n"`, `"a\\n"`},
-		{`"a\n"`, `"a\n"`},
-		{`"a\""`, `"a\""`},
-		{`'a'`, `'a'`},
-		{`0b10`, `0b10`},
-		{`0x1234_5678`, `0x1234_5678`},
-		{`5 5`, `error: 1:3: unexpected token INT, expected end of expression`}, // test for a bugfix
-		// Binary operators.
-		{`5+5`, `5 + 5`},
-		{`5-5`, `5 - 5`},
-		{`5*5`, `5 * 5`},
-		{`5/5`, `5 / 5`},
-		{`5%5`, `5 % 5`},
-		{`5&5`, `5 & 5`},
-		{`5|5`, `5 | 5`},
-		{`5^5`, `5 ^ 5`},
-		{`5||5`, `error: 1:2: unexpected token ||, expected end of expression`}, // logical binops aren't supported yet
-		{`(5/5)`, `(5 / 5)`},
-		{`1 - 2`, `1 - 2`},
-		{`1 - 2 + 3`, `1 - 2 + 3`},
-		{`1 - 2 * 3`, `1 - 2*3`},
-		{`(1 - 2) * 3`, `(1 - 2) * 3`},
-		{`1 * 2 - 3`, `1*2 - 3`},
-		{`1 * (2 - 3)`, `1 * (2 - 3)`},
-		// Unary operators.
-		{`-5`, `-5`},
-		{`-5-2`, `-5 - 2`},
-		{`5 - - 2`, `5 - -2`},
-	} {
-		fset := token.NewFileSet()
-		startPos := fset.AddFile("", -1, 1000).Pos(0)
-		expr, err := parseConst(startPos, fset, tc.C)
-		s := "<invalid>"
-		if err != nil {
-			if !strings.HasPrefix(tc.Go, "error: ") {
-				t.Errorf("expected value %#v for C constant %#v but got error %#v", tc.Go, tc.C, err.Error())
-				continue
-			}
-			s = "error: " + err.Error()
-		} else if expr != nil {
-			// Serialize the Go constant to a string, for more readable test
-			// cases.
-			buf := &bytes.Buffer{}
-			err := format.Node(buf, fset, expr)
-			if err != nil {
-				t.Errorf("could not format expr from C constant %#v: %v", tc.C, err)
-				continue
-			}
-			s = buf.String()
-		}
-		if s != tc.Go {
-			t.Errorf("C constant %#v was parsed to %#v while expecting %#v", tc.C, s, tc.Go)
-		}
-	}
-}

cgo/libclang_config_llvm14.go

@@ -1,15 +0,0 @@
-//go:build !byollvm && llvm14
-
-package cgo
-
-/*
-#cgo linux        CFLAGS:  -I/usr/lib/llvm-14/include
-#cgo darwin,amd64 CFLAGS:  -I/usr/local/opt/llvm@14/include
-#cgo darwin,arm64 CFLAGS:  -I/opt/homebrew/opt/llvm@14/include
-#cgo freebsd      CFLAGS:  -I/usr/local/llvm14/include
-#cgo linux        LDFLAGS: -L/usr/lib/llvm-14/lib -lclang
-#cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@14/lib -lclang -lffi
-#cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@14/lib -lclang -lffi
-#cgo freebsd      LDFLAGS: -L/usr/local/llvm14/lib -lclang
-*/
-import "C"

cgo/libclang_config_llvm15.go

@@ -1,15 +0,0 @@
-//go:build !byollvm && !llvm14
-
-package cgo
-
-/*
-#cgo linux        CFLAGS:  -I/usr/lib/llvm-15/include
-#cgo darwin,amd64 CFLAGS:  -I/usr/local/opt/llvm@15/include
-#cgo darwin,arm64 CFLAGS:  -I/opt/homebrew/opt/llvm@15/include
-#cgo freebsd      CFLAGS:  -I/usr/local/llvm15/include
-#cgo linux        LDFLAGS: -L/usr/lib/llvm-15/lib -lclang
-#cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@15/lib -lclang -lffi
-#cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@15/lib -lclang -lffi
-#cgo freebsd      LDFLAGS: -L/usr/local/llvm15/lib -lclang
-*/
-import "C"

cgo/libclang_stubs.c

@@ -1,82 +0,0 @@
-
-// This file implements some small trampoline functions. The signatures
-// are slightly different from the ones defined in libclang.go, but they
-// should be ABI compatible.
-
-#include <clang-c/Index.h> // If this fails, libclang headers aren't available. Please take a look here: https://tinygo.org/docs/guides/build/
-
-CXCursor tinygo_clang_getTranslationUnitCursor(CXTranslationUnit tu) {
-	return clang_getTranslationUnitCursor(tu);
-}
-
-unsigned tinygo_clang_visitChildren(CXCursor parent, CXCursorVisitor visitor, CXClientData client_data) {
-	return clang_visitChildren(parent, visitor, client_data);
-}
-
-CXString tinygo_clang_getCursorSpelling(CXCursor c) {
-	return clang_getCursorSpelling(c);
-}
-
-CXString tinygo_clang_getCursorPrettyPrinted(CXCursor c, CXPrintingPolicy policy) {
-	return clang_getCursorPrettyPrinted(c, policy);
-}
-
-CXPrintingPolicy tinygo_clang_getCursorPrintingPolicy(CXCursor c) {
-	return clang_getCursorPrintingPolicy(c);
-}
-
-enum CXCursorKind tinygo_clang_getCursorKind(CXCursor c) {
-	return clang_getCursorKind(c);
-}
-
-CXType tinygo_clang_getCursorType(CXCursor c) {
-	return clang_getCursorType(c);
-}
-
-CXCursor tinygo_clang_getTypeDeclaration(CXType t) {
-	return clang_getTypeDeclaration(t);
-}
-
-CXType tinygo_clang_getTypedefDeclUnderlyingType(CXCursor c) {
-	return clang_getTypedefDeclUnderlyingType(c);
-}
-
-CXType tinygo_clang_getCursorResultType(CXCursor c) {
-	return clang_getCursorResultType(c);
-}
-
-int tinygo_clang_Cursor_getNumArguments(CXCursor c) {
-	return clang_Cursor_getNumArguments(c);
-}
-
-CXCursor tinygo_clang_Cursor_getArgument(CXCursor c, unsigned i) {
-	return clang_Cursor_getArgument(c, i);
-}
-
-enum CX_StorageClass tinygo_clang_Cursor_getStorageClass(CXCursor c) {
-	return clang_Cursor_getStorageClass(c);
-}
-
-CXSourceLocation tinygo_clang_getCursorLocation(CXCursor c) {
-	return clang_getCursorLocation(c);
-}
-
-CXSourceRange tinygo_clang_getCursorExtent(CXCursor c) {
-	return clang_getCursorExtent(c);
-}
-
-CXTranslationUnit tinygo_clang_Cursor_getTranslationUnit(CXCursor c) {
-	return clang_Cursor_getTranslationUnit(c);
-}
-
-long long tinygo_clang_getEnumConstantDeclValue(CXCursor c) {
-	return clang_getEnumConstantDeclValue(c);
-}
-
-CXType tinygo_clang_getEnumDeclIntegerType(CXCursor c) {
-	return clang_getEnumDeclIntegerType(c);
-}
-
-unsigned tinygo_clang_Cursor_isBitField(CXCursor c) {
-	return clang_Cursor_isBitField(c);
-}

cgo/security.go

@@ -1,301 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// This file has been copied from the Go 1.13 release tree.
-
-// Checking of compiler and linker flags.
-// We must avoid flags like -fplugin=, which can allow
-// arbitrary code execution during the build.
-// Do not make changes here without carefully
-// considering the implications.
-// (That's why the code is isolated in a file named security.go.)
-//
-// Note that -Wl,foo means split foo on commas and pass to
-// the linker, so that -Wl,-foo,bar means pass -foo bar to
-// the linker. Similarly -Wa,foo for the assembler and so on.
-// If any of these are permitted, the wildcard portion must
-// disallow commas.
-//
-// Note also that GNU binutils accept any argument @foo
-// as meaning "read more flags from the file foo", so we must
-// guard against any command-line argument beginning with @,
-// even things like "-I @foo".
-// We use safeArg (which is even more conservative)
-// to reject these.
-//
-// Even worse, gcc -I@foo (one arg) turns into cc1 -I @foo (two args),
-// so although gcc doesn't expand the @foo, cc1 will.
-// So out of paranoia, we reject @ at the beginning of every
-// flag argument that might be split into its own argument.
-
-package cgo
-
-import (
-	"fmt"
-	"os"
-	"regexp"
-	"strings"
-	"unicode/utf8"
-)
-
-var re = regexp.MustCompile
-
-var validCompilerFlags = []*regexp.Regexp{
-	re(`-D([A-Za-z_].*)`),
-	re(`-F([^@\-].*)`),
-	re(`-I([^@\-].*)`),
-	re(`-O`),
-	re(`-O([^@\-].*)`),
-	re(`-W`),
-	re(`-W([^@,]+)`), // -Wall but not -Wa,-foo.
-	re(`-Wa,-mbig-obj`),
-	re(`-Wp,-D([A-Za-z_].*)`),
-	re(`-ansi`),
-	re(`-f(no-)?asynchronous-unwind-tables`),
-	re(`-f(no-)?blocks`),
-	re(`-f(no-)builtin-[a-zA-Z0-9_]*`),
-	re(`-f(no-)?common`),
-	re(`-f(no-)?constant-cfstrings`),
-	re(`-fdiagnostics-show-note-include-stack`),
-	re(`-f(no-)?eliminate-unused-debug-types`),
-	re(`-f(no-)?exceptions`),
-	re(`-f(no-)?fast-math`),
-	re(`-f(no-)?inline-functions`),
-	re(`-finput-charset=([^@\-].*)`),
-	re(`-f(no-)?fat-lto-objects`),
-	re(`-f(no-)?keep-inline-dllexport`),
-	re(`-f(no-)?lto`),
-	re(`-fmacro-backtrace-limit=(.+)`),
-	re(`-fmessage-length=(.+)`),
-	re(`-f(no-)?modules`),
-	re(`-f(no-)?objc-arc`),
-	re(`-f(no-)?objc-nonfragile-abi`),
-	re(`-f(no-)?objc-legacy-dispatch`),
-	re(`-f(no-)?omit-frame-pointer`),
-	re(`-f(no-)?openmp(-simd)?`),
-	re(`-f(no-)?permissive`),
-	re(`-f(no-)?(pic|PIC|pie|PIE)`),
-	re(`-f(no-)?plt`),
-	re(`-f(no-)?rtti`),
-	re(`-f(no-)?split-stack`),
-	re(`-f(no-)?stack-(.+)`),
-	re(`-f(no-)?strict-aliasing`),
-	re(`-f(un)signed-char`),
-	re(`-f(no-)?use-linker-plugin`), // safe if -B is not used; we don't permit -B
-	re(`-f(no-)?visibility-inlines-hidden`),
-	re(`-fsanitize=(.+)`),
-	re(`-ftemplate-depth-(.+)`),
-	re(`-fvisibility=(.+)`),
-	re(`-g([^@\-].*)?`),
-	re(`-m32`),
-	re(`-m64`),
-	re(`-m(abi|arch|cpu|fpu|tune)=([^@\-].*)`),
-	re(`-m(no-)?v?aes`),
-	re(`-marm`),
-	re(`-m(no-)?avx[0-9a-z]*`),
-	re(`-mfloat-abi=([^@\-].*)`),
-	re(`-mfpmath=[0-9a-z,+]*`),
-	re(`-m(no-)?avx[0-9a-z.]*`),
-	re(`-m(no-)?ms-bitfields`),
-	re(`-m(no-)?stack-(.+)`),
-	re(`-mmacosx-(.+)`),
-	re(`-mios-simulator-version-min=(.+)`),
-	re(`-miphoneos-version-min=(.+)`),
-	re(`-mtvos-simulator-version-min=(.+)`),
-	re(`-mtvos-version-min=(.+)`),
-	re(`-mwatchos-simulator-version-min=(.+)`),
-	re(`-mwatchos-version-min=(.+)`),
-	re(`-mnop-fun-dllimport`),
-	re(`-m(no-)?sse[0-9.]*`),
-	re(`-m(no-)?ssse3`),
-	re(`-mthumb(-interwork)?`),
-	re(`-mthreads`),
-	re(`-mwindows`),
-	re(`--param=ssp-buffer-size=[0-9]*`),
-	re(`-pedantic(-errors)?`),
-	re(`-pipe`),
-	re(`-pthread`),
-	re(`-?-std=([^@\-].*)`),
-	re(`-?-stdlib=([^@\-].*)`),
-	re(`--sysroot=([^@\-].*)`),
-	re(`-w`),
-	re(`-x([^@\-].*)`),
-	re(`-v`),
-}
-
-var validCompilerFlagsWithNextArg = []string{
-	"-arch",
-	"-D",
-	"-I",
-	"-framework",
-	"-isysroot",
-	"-isystem",
-	"--sysroot",
-	"-target",
-	"-x",
-}
-
-var validLinkerFlags = []*regexp.Regexp{
-	re(`-F([^@\-].*)`),
-	re(`-l([^@\-].*)`),
-	re(`-L([^@\-].*)`),
-	re(`-O`),
-	re(`-O([^@\-].*)`),
-	re(`-f(no-)?(pic|PIC|pie|PIE)`),
-	re(`-f(no-)?openmp(-simd)?`),
-	re(`-fsanitize=([^@\-].*)`),
-	re(`-flat_namespace`),
-	re(`-g([^@\-].*)?`),
-	re(`-headerpad_max_install_names`),
-	re(`-m(abi|arch|cpu|fpu|tune)=([^@\-].*)`),
-	re(`-mfloat-abi=([^@\-].*)`),
-	re(`-mmacosx-(.+)`),
-	re(`-mios-simulator-version-min=(.+)`),
-	re(`-miphoneos-version-min=(.+)`),
-	re(`-mthreads`),
-	re(`-mwindows`),
-	re(`-(pic|PIC|pie|PIE)`),
-	re(`-pthread`),
-	re(`-rdynamic`),
-	re(`-shared`),
-	re(`-?-static([-a-z0-9+]*)`),
-	re(`-?-stdlib=([^@\-].*)`),
-	re(`-v`),
-
-	// Note that any wildcards in -Wl need to exclude comma,
-	// since -Wl splits its argument at commas and passes
-	// them all to the linker uninterpreted. Allowing comma
-	// in a wildcard would allow tunnelling arbitrary additional
-	// linker arguments through one of these.
-	re(`-Wl,--(no-)?allow-multiple-definition`),
-	re(`-Wl,--(no-)?allow-shlib-undefined`),
-	re(`-Wl,--(no-)?as-needed`),
-	re(`-Wl,-Bdynamic`),
-	re(`-Wl,-berok`),
-	re(`-Wl,-Bstatic`),
-	re(`-WL,-O([^@,\-][^,]*)?`),
-	re(`-Wl,-d[ny]`),
-	re(`-Wl,--disable-new-dtags`),
-	re(`-Wl,-e[=,][a-zA-Z0-9]*`),
-	re(`-Wl,--enable-new-dtags`),
-	re(`-Wl,--end-group`),
-	re(`-Wl,--(no-)?export-dynamic`),
-	re(`-Wl,-framework,[^,@\-][^,]+`),
-	re(`-Wl,-headerpad_max_install_names`),
-	re(`-Wl,--no-undefined`),
-	re(`-Wl,-R([^@\-][^,@]*$)`),
-	re(`-Wl,--just-symbols[=,]([^,@\-][^,@]+)`),
-	re(`-Wl,-rpath(-link)?[=,]([^,@\-][^,]+)`),
-	re(`-Wl,-s`),
-	re(`-Wl,-search_paths_first`),
-	re(`-Wl,-sectcreate,([^,@\-][^,]+),([^,@\-][^,]+),([^,@\-][^,]+)`),
-	re(`-Wl,--start-group`),
-	re(`-Wl,-?-static`),
-	re(`-Wl,-?-subsystem,(native|windows|console|posix|xbox)`),
-	re(`-Wl,-syslibroot[=,]([^,@\-][^,]+)`),
-	re(`-Wl,-undefined[=,]([^,@\-][^,]+)`),
-	re(`-Wl,-?-unresolved-symbols=[^,]+`),
-	re(`-Wl,--(no-)?warn-([^,]+)`),
-	re(`-Wl,-z,(no)?execstack`),
-	re(`-Wl,-z,relro`),
-
-	re(`[a-zA-Z0-9_/].*\.(a|o|obj|dll|dylib|so)`), // direct linker inputs: x.o or libfoo.so (but not -foo.o or @foo.o)
-	re(`\./.*\.(a|o|obj|dll|dylib|so)`),
-}
-
-var validLinkerFlagsWithNextArg = []string{
-	"-arch",
-	"-F",
-	"-l",
-	"-L",
-	"-framework",
-	"-isysroot",
-	"--sysroot",
-	"-target",
-	"-Wl,-framework",
-	"-Wl,-rpath",
-	"-Wl,-R",
-	"-Wl,--just-symbols",
-	"-Wl,-undefined",
-}
-
-func checkCompilerFlags(name string, list []string) error {
-	return checkFlags(name, list, validCompilerFlags, validCompilerFlagsWithNextArg)
-}
-
-func checkLinkerFlags(name string, list []string) error {
-	return checkFlags(name, list, validLinkerFlags, validLinkerFlagsWithNextArg)
-}
-
-func checkFlags(name string, list []string, valid []*regexp.Regexp, validNext []string) error {
-	// Let users override rules with $CGO_CFLAGS_ALLOW, $CGO_CFLAGS_DISALLOW, etc.
-	var (
-		allow    *regexp.Regexp
-		disallow *regexp.Regexp
-	)
-	if env := os.Getenv("CGO_" + name + "_ALLOW"); env != "" {
-		r, err := regexp.Compile(env)
-		if err != nil {
-			return fmt.Errorf("parsing $CGO_%s_ALLOW: %v", name, err)
-		}
-		allow = r
-	}
-	if env := os.Getenv("CGO_" + name + "_DISALLOW"); env != "" {
-		r, err := regexp.Compile(env)
-		if err != nil {
-			return fmt.Errorf("parsing $CGO_%s_DISALLOW: %v", name, err)
-		}
-		disallow = r
-	}
-
-Args:
-	for i := 0; i < len(list); i++ {
-		arg := list[i]
-		if disallow != nil && disallow.FindString(arg) == arg {
-			goto Bad
-		}
-		if allow != nil && allow.FindString(arg) == arg {
-			continue Args
-		}
-		for _, re := range valid {
-			if re.FindString(arg) == arg { // must be complete match
-				continue Args
-			}
-		}
-		for _, x := range validNext {
-			if arg == x {
-				if i+1 < len(list) && safeArg(list[i+1]) {
-					i++
-					continue Args
-				}
-
-				// Permit -Wl,-framework -Wl,name.
-				if i+1 < len(list) &&
-					strings.HasPrefix(arg, "-Wl,") &&
-					strings.HasPrefix(list[i+1], "-Wl,") &&
-					safeArg(list[i+1][4:]) &&
-					!strings.Contains(list[i+1][4:], ",") {
-					i++
-					continue Args
-				}
-
-				if i+1 < len(list) {
-					return fmt.Errorf("invalid flag: %s %s (see https://golang.org/s/invalidflag)", arg, list[i+1])
-				}
-				return fmt.Errorf("invalid flag: %s without argument (see https://golang.org/s/invalidflag)", arg)
-			}
-		}
-	Bad:
-		return fmt.Errorf("invalid flag: %s", arg)
-	}
-	return nil
-}
-
-func safeArg(name string) bool {
-	if name == "" {
-		return false
-	}
-	c := name[0]
-	return '0' <= c && c <= '9' || 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z' || c == '.' || c == '_' || c == '/' || c >= utf8.RuneSelf
-}

cgo/security_test.go

@@ -1,260 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// This file has been copied from the Go 1.13 release tree.
-
-package cgo
-
-import (
-	"os"
-	"testing"
-)
-
-var goodCompilerFlags = [][]string{
-	{"-DFOO"},
-	{"-Dfoo=bar"},
-	{"-F/Qt"},
-	{"-I/"},
-	{"-I/etc/passwd"},
-	{"-I."},
-	{"-O"},
-	{"-O2"},
-	{"-Osmall"},
-	{"-W"},
-	{"-Wall"},
-	{"-fobjc-arc"},
-	{"-fno-objc-arc"},
-	{"-fomit-frame-pointer"},
-	{"-fno-omit-frame-pointer"},
-	{"-fpic"},
-	{"-fno-pic"},
-	{"-fPIC"},
-	{"-fno-PIC"},
-	{"-fpie"},
-	{"-fno-pie"},
-	{"-fPIE"},
-	{"-fno-PIE"},
-	{"-fsplit-stack"},
-	{"-fno-split-stack"},
-	{"-fstack-xxx"},
-	{"-fno-stack-xxx"},
-	{"-fsanitize=hands"},
-	{"-g"},
-	{"-ggdb"},
-	{"-march=souza"},
-	{"-mcpu=123"},
-	{"-mfpu=123"},
-	{"-mtune=happybirthday"},
-	{"-mstack-overflow"},
-	{"-mno-stack-overflow"},
-	{"-mmacosx-version"},
-	{"-mnop-fun-dllimport"},
-	{"-pthread"},
-	{"-std=c99"},
-	{"-xc"},
-	{"-D", "FOO"},
-	{"-D", "foo=bar"},
-	{"-I", "."},
-	{"-I", "/etc/passwd"},
-	{"-I", "世界"},
-	{"-framework", "Chocolate"},
-	{"-x", "c"},
-	{"-v"},
-}
-
-var badCompilerFlags = [][]string{
-	{"-D@X"},
-	{"-D-X"},
-	{"-F@dir"},
-	{"-F-dir"},
-	{"-I@dir"},
-	{"-I-dir"},
-	{"-O@1"},
-	{"-Wa,-foo"},
-	{"-W@foo"},
-	{"-g@gdb"},
-	{"-g-gdb"},
-	{"-march=@dawn"},
-	{"-march=-dawn"},
-	{"-std=@c99"},
-	{"-std=-c99"},
-	{"-x@c"},
-	{"-x-c"},
-	{"-D", "@foo"},
-	{"-D", "-foo"},
-	{"-I", "@foo"},
-	{"-I", "-foo"},
-	{"-framework", "-Caffeine"},
-	{"-framework", "@Home"},
-	{"-x", "--c"},
-	{"-x", "@obj"},
-}
-
-func TestCheckCompilerFlags(t *testing.T) {
-	for _, f := range goodCompilerFlags {
-		if err := checkCompilerFlags("test", f); err != nil {
-			t.Errorf("unexpected error for %q: %v", f, err)
-		}
-	}
-	for _, f := range badCompilerFlags {
-		if err := checkCompilerFlags("test", f); err == nil {
-			t.Errorf("missing error for %q", f)
-		}
-	}
-}
-
-var goodLinkerFlags = [][]string{
-	{"-Fbar"},
-	{"-lbar"},
-	{"-Lbar"},
-	{"-fpic"},
-	{"-fno-pic"},
-	{"-fPIC"},
-	{"-fno-PIC"},
-	{"-fpie"},
-	{"-fno-pie"},
-	{"-fPIE"},
-	{"-fno-PIE"},
-	{"-fsanitize=hands"},
-	{"-g"},
-	{"-ggdb"},
-	{"-march=souza"},
-	{"-mcpu=123"},
-	{"-mfpu=123"},
-	{"-mtune=happybirthday"},
-	{"-pic"},
-	{"-pthread"},
-	{"-Wl,-rpath,foo"},
-	{"-Wl,-rpath,$ORIGIN/foo"},
-	{"-Wl,-R", "/foo"},
-	{"-Wl,-R", "foo"},
-	{"-Wl,-R,foo"},
-	{"-Wl,--just-symbols=foo"},
-	{"-Wl,--just-symbols,foo"},
-	{"-Wl,--warn-error"},
-	{"-Wl,--no-warn-error"},
-	{"foo.so"},
-	{"_世界.dll"},
-	{"./x.o"},
-	{"libcgosotest.dylib"},
-	{"-F", "framework"},
-	{"-l", "."},
-	{"-l", "/etc/passwd"},
-	{"-l", "世界"},
-	{"-L", "framework"},
-	{"-framework", "Chocolate"},
-	{"-v"},
-	{"-Wl,-framework", "-Wl,Chocolate"},
-	{"-Wl,-framework,Chocolate"},
-	{"-Wl,-unresolved-symbols=ignore-all"},
-}
-
-var badLinkerFlags = [][]string{
-	{"-DFOO"},
-	{"-Dfoo=bar"},
-	{"-W"},
-	{"-Wall"},
-	{"-fobjc-arc"},
-	{"-fno-objc-arc"},
-	{"-fomit-frame-pointer"},
-	{"-fno-omit-frame-pointer"},
-	{"-fsplit-stack"},
-	{"-fno-split-stack"},
-	{"-fstack-xxx"},
-	{"-fno-stack-xxx"},
-	{"-mstack-overflow"},
-	{"-mno-stack-overflow"},
-	{"-mnop-fun-dllimport"},
-	{"-std=c99"},
-	{"-xc"},
-	{"-D", "FOO"},
-	{"-D", "foo=bar"},
-	{"-I", "FOO"},
-	{"-L", "@foo"},
-	{"-L", "-foo"},
-	{"-x", "c"},
-	{"-D@X"},
-	{"-D-X"},
-	{"-I@dir"},
-	{"-I-dir"},
-	{"-O@1"},
-	{"-Wa,-foo"},
-	{"-W@foo"},
-	{"-g@gdb"},
-	{"-g-gdb"},
-	{"-march=@dawn"},
-	{"-march=-dawn"},
-	{"-std=@c99"},
-	{"-std=-c99"},
-	{"-x@c"},
-	{"-x-c"},
-	{"-D", "@foo"},
-	{"-D", "-foo"},
-	{"-I", "@foo"},
-	{"-I", "-foo"},
-	{"-l", "@foo"},
-	{"-l", "-foo"},
-	{"-framework", "-Caffeine"},
-	{"-framework", "@Home"},
-	{"-Wl,-framework,-Caffeine"},
-	{"-Wl,-framework", "-Wl,@Home"},
-	{"-Wl,-framework", "@Home"},
-	{"-Wl,-framework,Chocolate,@Home"},
-	{"-x", "--c"},
-	{"-x", "@obj"},
-	{"-Wl,-rpath,@foo"},
-	{"-Wl,-R,foo,bar"},
-	{"-Wl,-R,@foo"},
-	{"-Wl,--just-symbols,@foo"},
-	{"../x.o"},
-}
-
-func TestCheckLinkerFlags(t *testing.T) {
-	for _, f := range goodLinkerFlags {
-		if err := checkLinkerFlags("test", f); err != nil {
-			t.Errorf("unexpected error for %q: %v", f, err)
-		}
-	}
-	for _, f := range badLinkerFlags {
-		if err := checkLinkerFlags("test", f); err == nil {
-			t.Errorf("missing error for %q", f)
-		}
-	}
-}
-
-func TestCheckFlagAllowDisallow(t *testing.T) {
-	if err := checkCompilerFlags("TEST", []string{"-disallow"}); err == nil {
-		t.Fatalf("missing error for -disallow")
-	}
-	os.Setenv("CGO_TEST_ALLOW", "-disallo")
-	if err := checkCompilerFlags("TEST", []string{"-disallow"}); err == nil {
-		t.Fatalf("missing error for -disallow with CGO_TEST_ALLOW=-disallo")
-	}
-	os.Setenv("CGO_TEST_ALLOW", "-disallow")
-	if err := checkCompilerFlags("TEST", []string{"-disallow"}); err != nil {
-		t.Fatalf("unexpected error for -disallow with CGO_TEST_ALLOW=-disallow: %v", err)
-	}
-	os.Unsetenv("CGO_TEST_ALLOW")
-
-	if err := checkCompilerFlags("TEST", []string{"-Wall"}); err != nil {
-		t.Fatalf("unexpected error for -Wall: %v", err)
-	}
-	os.Setenv("CGO_TEST_DISALLOW", "-Wall")
-	if err := checkCompilerFlags("TEST", []string{"-Wall"}); err == nil {
-		t.Fatalf("missing error for -Wall with CGO_TEST_DISALLOW=-Wall")
-	}
-	os.Setenv("CGO_TEST_ALLOW", "-Wall") // disallow wins
-	if err := checkCompilerFlags("TEST", []string{"-Wall"}); err == nil {
-		t.Fatalf("missing error for -Wall with CGO_TEST_DISALLOW=-Wall and CGO_TEST_ALLOW=-Wall")
-	}
-
-	os.Setenv("CGO_TEST_ALLOW", "-fplugin.*")
-	os.Setenv("CGO_TEST_DISALLOW", "-fplugin=lint.so")
-	if err := checkCompilerFlags("TEST", []string{"-fplugin=faster.so"}); err != nil {
-		t.Fatalf("unexpected error for -fplugin=faster.so: %v", err)
-	}
-	if err := checkCompilerFlags("TEST", []string{"-fplugin=lint.so"}); err == nil {
-		t.Fatalf("missing error for -fplugin=lint.so: %v", err)
-	}
-}

cgo/sync.go

@@ -1,46 +0,0 @@
-package cgo
-
-import (
-	"sync"
-	"unsafe"
-)
-
-// #include <stdlib.h>
-import "C"
-
-// refMap is a convenient way to store opaque references that can be passed to
-// C. It is useful if an API uses function pointers and you cannot pass a Go
-// pointer but only a C pointer.
-type refMap struct {
-	refs map[unsafe.Pointer]interface{}
-	lock sync.Mutex
-}
-
-// Put stores a value in the map. It can later be retrieved using Get. It must
-// be removed using Remove to avoid memory leaks.
-func (m *refMap) Put(v interface{}) unsafe.Pointer {
-	m.lock.Lock()
-	defer m.lock.Unlock()
-	if m.refs == nil {
-		m.refs = make(map[unsafe.Pointer]interface{}, 1)
-	}
-	ref := C.malloc(1)
-	m.refs[ref] = v
-	return ref
-}
-
-// Get returns a stored value previously inserted with Put. Use the same
-// reference as you got from Put.
-func (m *refMap) Get(ref unsafe.Pointer) interface{} {
-	m.lock.Lock()
-	defer m.lock.Unlock()
-	return m.refs[ref]
-}
-
-// Remove deletes a single reference from the map.
-func (m *refMap) Remove(ref unsafe.Pointer) {
-	m.lock.Lock()
-	defer m.lock.Unlock()
-	delete(m.refs, ref)
-	C.free(ref)
-}

cgo/testdata/basic.go

@@ -1,3 +0,0 @@
-package main
-
-import "C"

cgo/testdata/basic.out.go

@@ -1,39 +0,0 @@
-package main
-
-import "unsafe"
-
-var _ unsafe.Pointer
-
-//go:linkname C.CString runtime.cgo_CString
-func C.CString(string) *C.char
-
-//go:linkname C.GoString runtime.cgo_GoString
-func C.GoString(*C.char) string
-
-//go:linkname C.__GoStringN runtime.cgo_GoStringN
-func C.__GoStringN(*C.char, uintptr) string
-
-func C.GoStringN(cstr *C.char, length C.int) string {
-	return C.__GoStringN(cstr, uintptr(length))
-}
-
-//go:linkname C.__GoBytes runtime.cgo_GoBytes
-func C.__GoBytes(unsafe.Pointer, uintptr) []byte
-
-func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
-	return C.__GoBytes(ptr, uintptr(length))
-}
-
-type (
-	C.char      uint8
-	C.schar     int8
-	C.uchar     uint8
-	C.short     int16
-	C.ushort    uint16
-	C.int       int32
-	C.uint      uint32
-	C.long      int32
-	C.ulong     uint32
-	C.longlong  int64
-	C.ulonglong uint64
-)

cgo/testdata/const.go

@@ -1,12 +0,0 @@
-package main
-
-/*
-#define foo 3
-#define bar foo
-*/
-import "C"
-
-const (
-	Foo = C.foo
-	Bar = C.bar
-)

cgo/testdata/const.out.go

@@ -1,42 +0,0 @@
-package main
-
-import "unsafe"
-
-var _ unsafe.Pointer
-
-//go:linkname C.CString runtime.cgo_CString
-func C.CString(string) *C.char
-
-//go:linkname C.GoString runtime.cgo_GoString
-func C.GoString(*C.char) string
-
-//go:linkname C.__GoStringN runtime.cgo_GoStringN
-func C.__GoStringN(*C.char, uintptr) string
-
-func C.GoStringN(cstr *C.char, length C.int) string {
-	return C.__GoStringN(cstr, uintptr(length))
-}
-
-//go:linkname C.__GoBytes runtime.cgo_GoBytes
-func C.__GoBytes(unsafe.Pointer, uintptr) []byte
-
-func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
-	return C.__GoBytes(ptr, uintptr(length))
-}
-
-type (
-	C.char      uint8
-	C.schar     int8
-	C.uchar     uint8
-	C.short     int16
-	C.ushort    uint16
-	C.int       int32
-	C.uint      uint32
-	C.long      int32
-	C.ulong     uint32
-	C.longlong  int64
-	C.ulonglong uint64
-)
-
-const C.foo = 3
-const C.bar = C.foo

cgo/testdata/errors.go

@@ -1,41 +0,0 @@
-package main
-
-/*
-#warning some warning
-
-typedef struct {
-	int x;
-	int y;
-} point_t;
-
-typedef someType noType; // undefined type
-
-#define SOME_CONST_1 5) // invalid const syntax
-#define SOME_CONST_2 6) // const not used (so no error)
-#define SOME_CONST_3 1234 // const too large for byte
-*/
-//
-//
-// #define SOME_CONST_4 8) // after some empty lines
-import "C"
-
-// #warning another warning
-import "C"
-
-// Make sure that errors for the following lines won't change with future
-// additions to the CGo preamble.
-//line errors.go:100
-var (
-	// constant too large
-	_ C.char = 2 << 10
-
-	// z member does not exist
-	_ C.point_t = C.point_t{z: 3}
-
-	// constant has syntax error
-	_ = C.SOME_CONST_1
-
-	_ byte = C.SOME_CONST_3
-
-	_ = C.SOME_CONST_4
-)

cgo/testdata/errors.out.go

@@ -1,60 +0,0 @@
-// CGo errors:
-//     testdata/errors.go:4:2: warning: some warning
-//     testdata/errors.go:11:9: error: unknown type name 'someType'
-//     testdata/errors.go:22:5: warning: another warning
-//     testdata/errors.go:13:23: unexpected token ), expected end of expression
-//     testdata/errors.go:19:26: unexpected token ), expected end of expression
-
-// Type checking errors after CGo processing:
-//     testdata/errors.go:102: cannot use 2 << 10 (untyped int constant 2048) as C.char value in variable declaration (overflows)
-//     testdata/errors.go:105: unknown field z in struct literal
-//     testdata/errors.go:108: undefined: C.SOME_CONST_1
-//     testdata/errors.go:110: cannot use C.SOME_CONST_3 (untyped int constant 1234) as byte value in variable declaration (overflows)
-//     testdata/errors.go:112: undefined: C.SOME_CONST_4
-
-package main
-
-import "unsafe"
-
-var _ unsafe.Pointer
-
-//go:linkname C.CString runtime.cgo_CString
-func C.CString(string) *C.char
-
-//go:linkname C.GoString runtime.cgo_GoString
-func C.GoString(*C.char) string
-
-//go:linkname C.__GoStringN runtime.cgo_GoStringN
-func C.__GoStringN(*C.char, uintptr) string
-
-func C.GoStringN(cstr *C.char, length C.int) string {
-	return C.__GoStringN(cstr, uintptr(length))
-}
-
-//go:linkname C.__GoBytes runtime.cgo_GoBytes
-func C.__GoBytes(unsafe.Pointer, uintptr) []byte
-
-func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
-	return C.__GoBytes(ptr, uintptr(length))
-}
-
-type (
-	C.char      uint8
-	C.schar     int8
-	C.uchar     uint8
-	C.short     int16
-	C.ushort    uint16
-	C.int       int32
-	C.uint      uint32
-	C.long      int32
-	C.ulong     uint32
-	C.longlong  int64
-	C.ulonglong uint64
-)
-type C._Ctype_struct___0 struct {
-	x C.int
-	y C.int
-}
-type C.point_t = C._Ctype_struct___0
-
-const C.SOME_CONST_3 = 1234

cgo/testdata/flags.go

@@ -1,37 +0,0 @@
-package main
-
-/*
-// this name doesn't exist
-#cgo  NOFLAGS: -foo
-
-// unknown flag
-#cgo CFLAGS: -fdoes-not-exist -DNOTDEFINED
-
-#cgo CFLAGS: -DFOO
-
-#cgo CFLAGS: -Iinclude
-#include "foo.h"
-
-#if defined(FOO)
-#define BAR 3
-#else
-#define BAR 5
-#endif
-
-#if defined(NOTDEFINED)
-#warning flag must not be defined
-#endif
-
-// Check Compiler flags
-#cgo LDFLAGS: -lc
-
-// This flag is not valid ldflags
-#cgo LDFLAGS: -does-not-exists
-
-*/
-import "C"
-
-var (
-	_ = C.BAR
-	_ = C.FOO_H
-)

cgo/testdata/flags.out.go

@@ -1,47 +0,0 @@
-// CGo errors:
-//     testdata/flags.go:5:7: invalid #cgo line: NOFLAGS
-//     testdata/flags.go:8:13: invalid flag: -fdoes-not-exist
-//     testdata/flags.go:29:14: invalid flag: -does-not-exists
-
-package main
-
-import "unsafe"
-
-var _ unsafe.Pointer
-
-//go:linkname C.CString runtime.cgo_CString
-func C.CString(string) *C.char
-
-//go:linkname C.GoString runtime.cgo_GoString
-func C.GoString(*C.char) string
-
-//go:linkname C.__GoStringN runtime.cgo_GoStringN
-func C.__GoStringN(*C.char, uintptr) string
-
-func C.GoStringN(cstr *C.char, length C.int) string {
-	return C.__GoStringN(cstr, uintptr(length))
-}
-
-//go:linkname C.__GoBytes runtime.cgo_GoBytes
-func C.__GoBytes(unsafe.Pointer, uintptr) []byte
-
-func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
-	return C.__GoBytes(ptr, uintptr(length))
-}
-
-type (
-	C.char      uint8
-	C.schar     int8
-	C.uchar     uint8
-	C.short     int16
-	C.ushort    uint16
-	C.int       int32
-	C.uint      uint32
-	C.long      int32
-	C.ulong     uint32
-	C.longlong  int64
-	C.ulonglong uint64
-)
-
-const C.BAR = 3
-const C.FOO_H = 1

cgo/testdata/include/foo.h

@@ -1 +0,0 @@
-#define FOO_H 1

cgo/testdata/symbols.go

@@ -1,25 +0,0 @@
-package main
-
-/*
-// Function signatures.
-int foo(int a, int b);
-void variadic0();
-void variadic2(int x, int y, ...);
-static void staticfunc(int x);
-
-// Global variable signatures.
-extern int someValue;
-*/
-import "C"
-
-// Test function signatures.
-func accessFunctions() {
-	C.foo(3, 4)
-	C.variadic0()
-	C.variadic2(3, 5)
-	C.staticfunc(3)
-}
-
-func accessGlobals() {
-	_ = C.someValue
-}

cgo/testdata/symbols.out.go

@@ -1,64 +0,0 @@
-package main
-
-import "unsafe"
-
-var _ unsafe.Pointer
-
-//go:linkname C.CString runtime.cgo_CString
-func C.CString(string) *C.char
-
-//go:linkname C.GoString runtime.cgo_GoString
-func C.GoString(*C.char) string
-
-//go:linkname C.__GoStringN runtime.cgo_GoStringN
-func C.__GoStringN(*C.char, uintptr) string
-
-func C.GoStringN(cstr *C.char, length C.int) string {
-	return C.__GoStringN(cstr, uintptr(length))
-}
-
-//go:linkname C.__GoBytes runtime.cgo_GoBytes
-func C.__GoBytes(unsafe.Pointer, uintptr) []byte
-
-func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
-	return C.__GoBytes(ptr, uintptr(length))
-}
-
-type (
-	C.char      uint8
-	C.schar     int8
-	C.uchar     uint8
-	C.short     int16
-	C.ushort    uint16
-	C.int       int32
-	C.uint      uint32
-	C.long      int32
-	C.ulong     uint32
-	C.longlong  int64
-	C.ulonglong uint64
-)
-
-//export foo
-func C.foo(a C.int, b C.int) C.int
-
-var C.foo$funcaddr unsafe.Pointer
-
-//export variadic0
-//go:variadic
-func C.variadic0()
-
-var C.variadic0$funcaddr unsafe.Pointer
-
-//export variadic2
-//go:variadic
-func C.variadic2(x C.int, y C.int)
-
-var C.variadic2$funcaddr unsafe.Pointer
-
-//export _Cgo_static_173c95a79b6df1980521_staticfunc
-func C.staticfunc!symbols.go(x C.int)
-
-var C.staticfunc!symbols.go$funcaddr unsafe.Pointer
-
-//go:extern someValue
-var C.someValue C.int

cgo/testdata/types.go

@@ -1,173 +0,0 @@
-package main
-
-/*
-// Simple typedef.
-typedef int myint;
-
-// Structs, with or without name.
-typedef struct {
-	int x;
-	int y;
-} point2d_t;
-typedef struct point3d {
-	int x;
-	int y;
-	int z;
-} point3d_t;
-
-// Structs with reserved field names.
-struct type1 {
-	// All these fields should be renamed.
-	int type;
-	int _type;
-	int __type;
-};
-struct type2 {
-	// This field should not be renamed.
-	int _type;
-};
-
-// Unions.
-typedef union {
-	// Union should be treated as a struct.
-	int i;
-} union1_t;
-typedef union {
-	// Union must contain a single field and have special getters/setters.
-	int    i;
-	double d;
-	short  s;
-} union3_t;
-typedef union union2d {
-	int i;
-	double d[2];
-} union2d_t;
-typedef union {
-	unsigned char arr[10];
-} unionarray_t;
-
-// Nested structs and unions.
-typedef struct {
-	point2d_t begin;
-	point2d_t end;
-	int       tag;
-	union {
-		point2d_t area;
-		point3d_t solid;
-	} coord;
-} struct_nested_t;
-typedef union {
-	point3d_t    point;
-	unionarray_t array;
-	union3_t     thing;
-} union_nested_t;
-
-// Enums. These define constant numbers. All these constants must be given the
-// correct number.
-typedef enum option {
-	optionA,
-	optionB,
-	optionC = -5,
-	optionD,
-	optionE = 10,
-	optionF,
-	optionG,
-} option_t;
-enum unused {
-	unused1 = 5,
-};
-
-// Anonymous enum.
-typedef enum {
-	option2A = 20,
-} option2_t;
-
-// Various types that are usually translated directly to Go types, but storing
-// them in a struct reveals them.
-typedef struct {
-	float  f;
-	double d;
-	int    *ptr;
-} types_t;
-
-// Arrays.
-typedef int myIntArray[10];
-
-// Bitfields.
-typedef struct {
-	unsigned char start;
-	unsigned char a : 5;
-	unsigned char b : 1;
-	unsigned char c : 2;
-	unsigned char :0; // new field
-	unsigned char d : 6;
-	unsigned char e : 3;
-	// Note that C++ allows bitfields bigger than the underlying type.
-} bitfield_t;
-*/
-import "C"
-
-// // Test that we can refer from this CGo fragment to the fragment above.
-// typedef myint myint2;
-import "C"
-
-var (
-	// aliases
-	_ C.float
-	_ C.double
-
-	// Simple typedefs.
-	_ C.myint
-
-	// Structs.
-	_ C.point2d_t
-	_ C.point3d_t
-	_ C.struct_point3d
-
-	// Structs with reserved field names.
-	_ C.struct_type1
-	_ C.struct_type2
-
-	// Unions.
-	_ C.union1_t
-	_ C.union3_t
-	_ C.union2d_t
-	_ C.unionarray_t
-
-	// Nested structs and unions.
-	_ C.struct_nested_t
-	_ C.union_nested_t
-
-	// Enums (anonymous and named).
-	_ C.option_t
-	_ C.enum_option
-	_ C.option2_t
-
-	// Various types.
-	_ C.types_t
-
-	// Arrays.
-	_ C.myIntArray
-)
-
-// Test bitfield accesses.
-func accessBitfields() {
-	var x C.bitfield_t
-	x.start = 3
-	x.set_bitfield_a(4)
-	x.set_bitfield_b(1)
-	x.set_bitfield_c(2)
-	x.d = 10
-	x.e = 5
-	var _ C.uchar = x.bitfield_a()
-}
-
-// Test union accesses.
-func accessUnion() {
-	var union1 C.union1_t
-	union1.i = 5
-
-	var union2d C.union2d_t
-	var _ *C.int = union2d.unionfield_i()
-	var _ *[2]float64 = union2d.unionfield_d()
-}

cgo/testdata/types.out.go

@@ -1,149 +0,0 @@
-package main
-
-import "unsafe"
-
-var _ unsafe.Pointer
-
-//go:linkname C.CString runtime.cgo_CString
-func C.CString(string) *C.char
-
-//go:linkname C.GoString runtime.cgo_GoString
-func C.GoString(*C.char) string
-
-//go:linkname C.__GoStringN runtime.cgo_GoStringN
-func C.__GoStringN(*C.char, uintptr) string
-
-func C.GoStringN(cstr *C.char, length C.int) string {
-	return C.__GoStringN(cstr, uintptr(length))
-}
-
-//go:linkname C.__GoBytes runtime.cgo_GoBytes
-func C.__GoBytes(unsafe.Pointer, uintptr) []byte
-
-func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
-	return C.__GoBytes(ptr, uintptr(length))
-}
-
-type (
-	C.char      uint8
-	C.schar     int8
-	C.uchar     uint8
-	C.short     int16
-	C.ushort    uint16
-	C.int       int32
-	C.uint      uint32
-	C.long      int32
-	C.ulong     uint32
-	C.longlong  int64
-	C.ulonglong uint64
-)
-type C.myint = C.int
-type C._Ctype_struct___0 struct {
-	x C.int
-	y C.int
-}
-type C.point2d_t = C._Ctype_struct___0
-type C.struct_point3d struct {
-	x C.int
-	y C.int
-	z C.int
-}
-type C.point3d_t = C.struct_point3d
-type C.struct_type1 struct {
-	_type   C.int
-	__type  C.int
-	___type C.int
-}
-type C.struct_type2 struct{ _type C.int }
-type C._Ctype_union___1 struct{ i C.int }
-type C.union1_t = C._Ctype_union___1
-type C._Ctype_union___2 struct{ $union uint64 }
-
-func (union *C._Ctype_union___2) unionfield_i() *C.int {
-	return (*C.int)(unsafe.Pointer(&union.$union))
-}
-func (union *C._Ctype_union___2) unionfield_d() *float64 {
-	return (*float64)(unsafe.Pointer(&union.$union))
-}
-func (union *C._Ctype_union___2) unionfield_s() *C.short {
-	return (*C.short)(unsafe.Pointer(&union.$union))
-}
-
-type C.union3_t = C._Ctype_union___2
-type C.union_union2d struct{ $union [2]uint64 }
-
-func (union *C.union_union2d) unionfield_i() *C.int { return (*C.int)(unsafe.Pointer(&union.$union)) }
-func (union *C.union_union2d) unionfield_d() *[2]float64 {
-	return (*[2]float64)(unsafe.Pointer(&union.$union))
-}
-
-type C.union2d_t = C.union_union2d
-type C._Ctype_union___3 struct{ arr [10]C.uchar }
-type C.unionarray_t = C._Ctype_union___3
-type C._Ctype_union___5 struct{ $union [3]uint32 }
-
-func (union *C._Ctype_union___5) unionfield_area() *C.point2d_t {
-	return (*C.point2d_t)(unsafe.Pointer(&union.$union))
-}
-func (union *C._Ctype_union___5) unionfield_solid() *C.point3d_t {
-	return (*C.point3d_t)(unsafe.Pointer(&union.$union))
-}
-
-type C._Ctype_struct___4 struct {
-	begin C.point2d_t
-	end   C.point2d_t
-	tag   C.int
-
-	coord C._Ctype_union___5
-}
-type C.struct_nested_t = C._Ctype_struct___4
-type C._Ctype_union___6 struct{ $union [2]uint64 }
-
-func (union *C._Ctype_union___6) unionfield_point() *C.point3d_t {
-	return (*C.point3d_t)(unsafe.Pointer(&union.$union))
-}
-func (union *C._Ctype_union___6) unionfield_array() *C.unionarray_t {
-	return (*C.unionarray_t)(unsafe.Pointer(&union.$union))
-}
-func (union *C._Ctype_union___6) unionfield_thing() *C.union3_t {
-	return (*C.union3_t)(unsafe.Pointer(&union.$union))
-}
-
-type C.union_nested_t = C._Ctype_union___6
-type C.enum_option = C.int
-type C.option_t = C.enum_option
-type C._Ctype_enum___7 = C.uint
-type C.option2_t = C._Ctype_enum___7
-type C._Ctype_struct___8 struct {
-	f   float32
-	d   float64
-	ptr *C.int
-}
-type C.types_t = C._Ctype_struct___8
-type C.myIntArray = [10]C.int
-type C._Ctype_struct___9 struct {
-	start        C.uchar
-	__bitfield_1 C.uchar
-
-	d C.uchar
-	e C.uchar
-}
-
-func (s *C._Ctype_struct___9) bitfield_a() C.uchar { return s.__bitfield_1 & 0x1f }
-func (s *C._Ctype_struct___9) set_bitfield_a(value C.uchar) {
-	s.__bitfield_1 = s.__bitfield_1&^0x1f | value&0x1f<<0
-}
-func (s *C._Ctype_struct___9) bitfield_b() C.uchar {
-	return s.__bitfield_1 >> 5 & 0x1
-}
-func (s *C._Ctype_struct___9) set_bitfield_b(value C.uchar) {
-	s.__bitfield_1 = s.__bitfield_1&^0x20 | value&0x1<<5
-}
-func (s *C._Ctype_struct___9) bitfield_c() C.uchar {
-	return s.__bitfield_1 >> 6
-}
-func (s *C._Ctype_struct___9) set_bitfield_c(value C.uchar,
-
-) { s.__bitfield_1 = s.__bitfield_1&0x3f | value<<6 }
-
-type C.bitfield_t = C._Ctype_struct___9

compileopts/config.go

@@ -1,576 +0,0 @@
-// Package compileopts contains the configuration for a single to-be-built
-// binary.
-package compileopts
-
-import (
-	"errors"
-	"fmt"
-	"os"
-	"path/filepath"
-	"regexp"
-	"strings"
-
-	"github.com/google/shlex"
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-// Config keeps all configuration affecting the build in a single struct.
-type Config struct {
-	Options        *Options
-	Target         *TargetSpec
-	GoMinorVersion int
-	ClangHeaders   string // Clang built-in header include path
-	TestConfig     TestConfig
-}
-
-// Triple returns the LLVM target triple, like armv6m-unknown-unknown-eabi.
-func (c *Config) Triple() string {
-	return c.Target.Triple
-}
-
-// CPU returns the LLVM CPU name, like atmega328p or arm7tdmi. It may return an
-// empty string if the CPU name is not known.
-func (c *Config) CPU() string {
-	return c.Target.CPU
-}
-
-// Features returns a list of features this CPU supports. For example, for a
-// RISC-V processor, that could be "+a,+c,+m". For many targets, an empty list
-// will be returned.
-func (c *Config) Features() string {
-	if c.Target.Features == "" {
-		return c.Options.LLVMFeatures
-	}
-	if c.Options.LLVMFeatures == "" {
-		return c.Target.Features
-	}
-	return c.Target.Features + "," + c.Options.LLVMFeatures
-}
-
-// ABI returns the -mabi= flag for this target (like -mabi=lp64). A zero-length
-// string is returned if the target doesn't specify an ABI.
-func (c *Config) ABI() string {
-	return c.Target.ABI
-}
-
-// GOOS returns the GOOS of the target. This might not always be the actual OS:
-// for example, bare-metal targets will usually pretend to be linux to get the
-// standard library to compile.
-func (c *Config) GOOS() string {
-	return c.Target.GOOS
-}
-
-// GOARCH returns the GOARCH of the target. This might not always be the actual
-// archtecture: for example, the AVR target is not supported by the Go standard
-// library so such targets will usually pretend to be linux/arm.
-func (c *Config) GOARCH() string {
-	return c.Target.GOARCH
-}
-
-// GOARM will return the GOARM environment variable given to the compiler when
-// building a program.
-func (c *Config) GOARM() string {
-	return c.Options.GOARM
-}
-
-// BuildTags returns the complete list of build tags used during this build.
-func (c *Config) BuildTags() []string {
-	targetTags := filterTags(c.Target.BuildTags, c.Options.Tags)
-	tags := append(targetTags, []string{"tinygo", "math_big_pure_go", "gc." + c.GC(), "scheduler." + c.Scheduler(), "serial." + c.Serial()}...)
-	for i := 1; i <= c.GoMinorVersion; i++ {
-		tags = append(tags, fmt.Sprintf("go1.%d", i))
-	}
-	tags = append(tags, c.Options.Tags...)
-	return tags
-}
-
-// CgoEnabled returns true if (and only if) CGo is enabled. It is true by
-// default and false if CGO_ENABLED is set to "0".
-func (c *Config) CgoEnabled() bool {
-	return goenv.Get("CGO_ENABLED") == "1"
-}
-
-// GC returns the garbage collection strategy in use on this platform. Valid
-// values are "none", "leaking", "conservative" and "precise".
-func (c *Config) GC() string {
-	if c.Options.GC != "" {
-		return c.Options.GC
-	}
-	if c.Target.GC != "" {
-		return c.Target.GC
-	}
-	return "conservative"
-}
-
-// NeedsStackObjects returns true if the compiler should insert stack objects
-// that can be traced by the garbage collector.
-func (c *Config) NeedsStackObjects() bool {
-	switch c.GC() {
-	case "conservative", "custom", "precise":
-		for _, tag := range c.BuildTags() {
-			if tag == "tinygo.wasm" {
-				return true
-			}
-		}
-
-		return false
-	default:
-		return false
-	}
-}
-
-// Scheduler returns the scheduler implementation. Valid values are "none",
-// "asyncify" and "tasks".
-func (c *Config) Scheduler() string {
-	if c.Options.Scheduler != "" {
-		return c.Options.Scheduler
-	}
-	if c.Target.Scheduler != "" {
-		return c.Target.Scheduler
-	}
-	// Fall back to none.
-	return "none"
-}
-
-// Serial returns the serial implementation for this build configuration: uart,
-// usb (meaning USB-CDC), or none.
-func (c *Config) Serial() string {
-	if c.Options.Serial != "" {
-		return c.Options.Serial
-	}
-	if c.Target.Serial != "" {
-		return c.Target.Serial
-	}
-	return "none"
-}
-
-// OptLevels returns the optimization level (0-2), size level (0-2), and inliner
-// threshold as used in the LLVM optimization pipeline.
-func (c *Config) OptLevels() (optLevel, sizeLevel int, inlinerThreshold uint) {
-	switch c.Options.Opt {
-	case "none", "0":
-		return 0, 0, 0 // -O0
-	case "1":
-		return 1, 0, 0 // -O1
-	case "2":
-		return 2, 0, 225 // -O2
-	case "s":
-		return 2, 1, 225 // -Os
-	case "z":
-		return 2, 2, 5 // -Oz, default
-	default:
-		// This is not shown to the user: valid choices are already checked as
-		// part of Options.Verify(). It is here as a sanity check.
-		panic("unknown optimization level: -opt=" + c.Options.Opt)
-	}
-}
-
-// PanicStrategy returns the panic strategy selected for this target. Valid
-// values are "print" (print the panic value, then exit) or "trap" (issue a trap
-// instruction).
-func (c *Config) PanicStrategy() string {
-	return c.Options.PanicStrategy
-}
-
-// AutomaticStackSize returns whether goroutine stack sizes should be determined
-// automatically at compile time, if possible. If it is false, no attempt is
-// made.
-func (c *Config) AutomaticStackSize() bool {
-	if c.Target.AutoStackSize != nil && c.Scheduler() == "tasks" {
-		return *c.Target.AutoStackSize
-	}
-	return false
-}
-
-// StackSize returns the default stack size to be used for goroutines, if the
-// stack size could not be determined automatically at compile time.
-func (c *Config) StackSize() uint64 {
-	if c.Options.StackSize != 0 {
-		return c.Options.StackSize
-	}
-	return c.Target.DefaultStackSize
-}
-
-// RP2040BootPatch returns whether the RP2040 boot patch should be applied that
-// calculates and patches in the checksum for the 2nd stage bootloader.
-func (c *Config) RP2040BootPatch() bool {
-	if c.Target.RP2040BootPatch != nil {
-		return *c.Target.RP2040BootPatch
-	}
-	return false
-}
-
-// MuslArchitecture returns the architecture name as used in musl libc. It is
-// usually the same as the first part of the LLVM triple, but not always.
-func MuslArchitecture(triple string) string {
-	arch := strings.Split(triple, "-")[0]
-	if strings.HasPrefix(arch, "arm") || strings.HasPrefix(arch, "thumb") {
-		arch = "arm"
-	}
-	return arch
-}
-
-// LibcPath returns the path to the libc directory. The libc path will be either
-// a precompiled libc shipped with a TinyGo build, or a libc path in the cache
-// directory (which might not yet be built).
-func (c *Config) LibcPath(name string) (path string, precompiled bool) {
-	archname := c.Triple()
-	if c.CPU() != "" {
-		archname += "-" + c.CPU()
-	}
-	if c.ABI() != "" {
-		archname += "-" + c.ABI()
-	}
-
-	// Try to load a precompiled library.
-	precompiledDir := filepath.Join(goenv.Get("TINYGOROOT"), "pkg", archname, name)
-	if _, err := os.Stat(precompiledDir); err == nil {
-		// Found a precompiled library for this OS/architecture. Return the path
-		// directly.
-		return precompiledDir, true
-	}
-
-	// No precompiled library found. Determine the path name that will be used
-	// in the build cache.
-	return filepath.Join(goenv.Get("GOCACHE"), name+"-"+archname), false
-}
-
-// DefaultBinaryExtension returns the default extension for binaries, such as
-// .exe, .wasm, or no extension (depending on the target).
-func (c *Config) DefaultBinaryExtension() string {
-	parts := strings.Split(c.Triple(), "-")
-	if parts[0] == "wasm32" {
-		// WebAssembly files always have the .wasm file extension.
-		return ".wasm"
-	}
-	if len(parts) >= 3 && parts[2] == "windows" {
-		// Windows uses .exe.
-		return ".exe"
-	}
-	if len(parts) >= 3 && parts[2] == "unknown" {
-		// There appears to be a convention to use the .elf file extension for
-		// ELF files intended for microcontrollers. I'm not aware of the origin
-		// of this, it's just something that is used by many projects.
-		// I think it's a good tradition, so let's keep it.
-		return ".elf"
-	}
-	// Linux, MacOS, etc, don't use a file extension. Use it as a fallback.
-	return ""
-}
-
-// CFlags returns the flags to pass to the C compiler. This is necessary for CGo
-// preprocessing.
-func (c *Config) CFlags() []string {
-	var cflags []string
-	for _, flag := range c.Target.CFlags {
-		cflags = append(cflags, strings.ReplaceAll(flag, "{root}", goenv.Get("TINYGOROOT")))
-	}
-	switch c.Target.Libc {
-	case "darwin-libSystem":
-		root := goenv.Get("TINYGOROOT")
-		cflags = append(cflags,
-			"--sysroot="+filepath.Join(root, "lib/macos-minimal-sdk/src"),
-		)
-	case "picolibc":
-		root := goenv.Get("TINYGOROOT")
-		picolibcDir := filepath.Join(root, "lib", "picolibc", "newlib", "libc")
-		path, _ := c.LibcPath("picolibc")
-		cflags = append(cflags,
-			"--sysroot="+path,
-			"-isystem", filepath.Join(path, "include"), // necessary for Xtensa
-			"-isystem", filepath.Join(picolibcDir, "include"),
-			"-isystem", filepath.Join(picolibcDir, "tinystdio"),
-		)
-	case "musl":
-		root := goenv.Get("TINYGOROOT")
-		path, _ := c.LibcPath("musl")
-		arch := MuslArchitecture(c.Triple())
-		cflags = append(cflags,
-			"-nostdlibinc",
-			"-isystem", filepath.Join(path, "include"),
-			"-isystem", filepath.Join(root, "lib", "musl", "arch", arch),
-			"-isystem", filepath.Join(root, "lib", "musl", "include"),
-		)
-	case "wasi-libc":
-		root := goenv.Get("TINYGOROOT")
-		cflags = append(cflags, "--sysroot="+root+"/lib/wasi-libc/sysroot")
-	case "mingw-w64":
-		root := goenv.Get("TINYGOROOT")
-		path, _ := c.LibcPath("mingw-w64")
-		cflags = append(cflags,
-			"--sysroot="+path,
-			"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "crt"),
-			"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "defaults", "include"),
-			"-D_UCRT",
-		)
-	case "":
-		// No libc specified, nothing to add.
-	default:
-		// Incorrect configuration. This could be handled in a better way, but
-		// usually this will be found by developers (not by TinyGo users).
-		panic("unknown libc: " + c.Target.Libc)
-	}
-	// Always emit debug information. It is optionally stripped at link time.
-	cflags = append(cflags, "-gdwarf-4")
-	// Use the same optimization level as TinyGo.
-	cflags = append(cflags, "-O"+c.Options.Opt)
-	// Set the LLVM target triple.
-	cflags = append(cflags, "--target="+c.Triple())
-	// Set the -mcpu (or similar) flag.
-	if c.Target.CPU != "" {
-		if c.GOARCH() == "amd64" || c.GOARCH() == "386" {
-			// x86 prefers the -march flag (-mcpu is deprecated there).
-			cflags = append(cflags, "-march="+c.Target.CPU)
-		} else if strings.HasPrefix(c.Triple(), "avr") {
-			// AVR MCUs use -mmcu instead of -mcpu.
-			cflags = append(cflags, "-mmcu="+c.Target.CPU)
-		} else {
-			// The rest just uses -mcpu.
-			cflags = append(cflags, "-mcpu="+c.Target.CPU)
-		}
-	}
-	// Set the -mabi flag, if needed.
-	if c.ABI() != "" {
-		cflags = append(cflags, "-mabi="+c.ABI())
-	}
-	return cflags
-}
-
-// LDFlags returns the flags to pass to the linker. A few more flags are needed
-// (like the one for the compiler runtime), but this represents the majority of
-// the flags.
-func (c *Config) LDFlags() []string {
-	root := goenv.Get("TINYGOROOT")
-	// Merge and adjust LDFlags.
-	var ldflags []string
-	for _, flag := range c.Target.LDFlags {
-		ldflags = append(ldflags, strings.ReplaceAll(flag, "{root}", root))
-	}
-	ldflags = append(ldflags, "-L", root)
-	if c.Target.LinkerScript != "" {
-		ldflags = append(ldflags, "-T", c.Target.LinkerScript)
-	}
-	return ldflags
-}
-
-// ExtraFiles returns the list of extra files to be built and linked with the
-// executable. This can include extra C and assembly files.
-func (c *Config) ExtraFiles() []string {
-	return c.Target.ExtraFiles
-}
-
-// DumpSSA returns whether to dump Go SSA while compiling (-dumpssa flag). Only
-// enable this for debugging.
-func (c *Config) DumpSSA() bool {
-	return c.Options.DumpSSA
-}
-
-// VerifyIR returns whether to run extra checks on the IR. This is normally
-// disabled but enabled during testing.
-func (c *Config) VerifyIR() bool {
-	return c.Options.VerifyIR
-}
-
-// Debug returns whether debug (DWARF) information should be retained by the
-// linker. By default, debug information is retained, but it can be removed
-// with the -no-debug flag.
-func (c *Config) Debug() bool {
-	return c.Options.Debug
-}
-
-// BinaryFormat returns an appropriate binary format, based on the file
-// extension and the configured binary format in the target JSON file.
-func (c *Config) BinaryFormat(ext string) string {
-	switch ext {
-	case ".bin", ".gba", ".nro":
-		// The simplest format possible: dump everything in a raw binary file.
-		if c.Target.BinaryFormat != "" {
-			return c.Target.BinaryFormat
-		}
-		return "bin"
-	case ".img":
-		// Image file. Only defined for the ESP32 at the moment, where it is a
-		// full (runnable) image that can be used in the Espressif QEMU fork.
-		if c.Target.BinaryFormat != "" {
-			return c.Target.BinaryFormat + "-img"
-		}
-		return "bin"
-	case ".hex":
-		// Similar to bin, but includes the start address and is thus usually a
-		// better format.
-		return "hex"
-	case ".uf2":
-		// Special purpose firmware format, mainly used on Adafruit boards.
-		// More information:
-		// https://github.com/Microsoft/uf2
-		return "uf2"
-	case ".zip":
-		if c.Target.BinaryFormat != "" {
-			return c.Target.BinaryFormat
-		}
-		return "zip"
-	default:
-		// Use the ELF format for unrecognized file formats.
-		return "elf"
-	}
-}
-
-// Programmer returns the flash method and OpenOCD interface name given a
-// particular configuration. It may either be all configured in the target JSON
-// file or be modified using the -programmmer command-line option.
-func (c *Config) Programmer() (method, openocdInterface string) {
-	switch c.Options.Programmer {
-	case "":
-		// No configuration supplied.
-		return c.Target.FlashMethod, c.Target.OpenOCDInterface
-	case "openocd", "msd", "command":
-		// The -programmer flag only specifies the flash method.
-		return c.Options.Programmer, c.Target.OpenOCDInterface
-	case "bmp":
-		// The -programmer flag only specifies the flash method.
-		return c.Options.Programmer, ""
-	default:
-		// The -programmer flag specifies something else, assume it specifies
-		// the OpenOCD interface name.
-		return "openocd", c.Options.Programmer
-	}
-}
-
-// OpenOCDConfiguration returns a list of command line arguments to OpenOCD.
-// This list of command-line arguments is based on the various OpenOCD-related
-// flags in the target specification.
-func (c *Config) OpenOCDConfiguration() (args []string, err error) {
-	_, openocdInterface := c.Programmer()
-	if openocdInterface == "" {
-		return nil, errors.New("OpenOCD programmer not set")
-	}
-	if !regexp.MustCompile(`^[\p{L}0-9_-]+$`).MatchString(openocdInterface) {
-		return nil, fmt.Errorf("OpenOCD programmer has an invalid name: %#v", openocdInterface)
-	}
-	if c.Target.OpenOCDTarget == "" {
-		return nil, errors.New("OpenOCD chip not set")
-	}
-	if !regexp.MustCompile(`^[\p{L}0-9_-]+$`).MatchString(c.Target.OpenOCDTarget) {
-		return nil, fmt.Errorf("OpenOCD target has an invalid name: %#v", c.Target.OpenOCDTarget)
-	}
-	if c.Target.OpenOCDTransport != "" && c.Target.OpenOCDTransport != "swd" {
-		return nil, fmt.Errorf("unknown OpenOCD transport: %#v", c.Target.OpenOCDTransport)
-	}
-	args = []string{"-f", "interface/" + openocdInterface + ".cfg"}
-	for _, cmd := range c.Target.OpenOCDCommands {
-		args = append(args, "-c", cmd)
-	}
-	if c.Target.OpenOCDTransport != "" {
-		transport := c.Target.OpenOCDTransport
-		if transport == "swd" {
-			switch openocdInterface {
-			case "stlink-dap":
-				transport = "dapdirect_swd"
-			}
-		}
-		args = append(args, "-c", "transport select "+transport)
-	}
-	args = append(args, "-f", "target/"+c.Target.OpenOCDTarget+".cfg")
-	return args, nil
-}
-
-// CodeModel returns the code model used on this platform.
-func (c *Config) CodeModel() string {
-	if c.Target.CodeModel != "" {
-		return c.Target.CodeModel
-	}
-
-	return "default"
-}
-
-// RelocationModel returns the relocation model in use on this platform. Valid
-// values are "static", "pic", "dynamicnopic".
-func (c *Config) RelocationModel() string {
-	if c.Target.RelocationModel != "" {
-		return c.Target.RelocationModel
-	}
-
-	return "static"
-}
-
-// WasmAbi returns the WASM ABI which is specified in the target JSON file.
-func (c *Config) WasmAbi() string {
-	return c.Target.WasmAbi
-}
-
-// EmulatorName is a shorthand to get the command for this emulator, something
-// like qemu-system-arm or simavr.
-func (c *Config) EmulatorName() string {
-	parts := strings.SplitN(c.Target.Emulator, " ", 2)
-	if len(parts) > 1 {
-		return parts[0]
-	}
-	return ""
-}
-
-// EmulatorFormat returns the binary format for the emulator and the associated
-// file extension. An empty string means to pass directly whatever the linker
-// produces directly without conversion (usually ELF format).
-func (c *Config) EmulatorFormat() (format, fileExt string) {
-	switch {
-	case strings.Contains(c.Target.Emulator, "{img}"):
-		return "img", ".img"
-	default:
-		return "", ""
-	}
-}
-
-// Emulator returns a ready-to-run command to run the given binary in an
-// emulator. Give it the format (returned by EmulatorFormat()) and the path to
-// the compiled binary.
-func (c *Config) Emulator(format, binary string) ([]string, error) {
-	parts, err := shlex.Split(c.Target.Emulator)
-	if err != nil {
-		return nil, fmt.Errorf("could not parse emulator command: %w", err)
-	}
-	var emulator []string
-	for _, s := range parts {
-		s = strings.ReplaceAll(s, "{root}", goenv.Get("TINYGOROOT"))
-		// Allow replacement of what's usually /tmp except notably Windows.
-		s = strings.ReplaceAll(s, "{tmpDir}", os.TempDir())
-		s = strings.ReplaceAll(s, "{"+format+"}", binary)
-		emulator = append(emulator, s)
-	}
-	return emulator, nil
-}
-
-type TestConfig struct {
-	CompileTestBinary bool
-	CompileOnly       bool
-	Verbose           bool
-	Short             bool
-	RunRegexp         string
-	Count             *int
-	BenchRegexp       string
-	BenchTime         string
-	BenchMem          bool
-}
-
-// filterTags removes predefined build tags for a target if a conflicting option
-// is provided by the user.
-func filterTags(targetTags []string, userTags []string) []string {
-	var filtered []string
-	for _, t := range targetTags {
-		switch {
-		case strings.HasPrefix(t, "runtime_memhash_"):
-			overridden := false
-			for _, ut := range userTags {
-				if strings.HasPrefix(ut, "runtime_memhash_") {
-					overridden = true
-					break
-				}
-			}
-			if !overridden {
-				filtered = append(filtered, t)
-			}
-		default:
-			filtered = append(filtered, t)
-		}
-	}
-	return filtered
-}

compileopts/config_test.go

@@ -1,132 +0,0 @@
-package compileopts
-
-import (
-	"fmt"
-	"strings"
-	"testing"
-)
-
-func TestBuildTags(t *testing.T) {
-	tests := []struct {
-		targetTags []string
-		userTags   []string
-		result     []string
-	}{
-		{
-			targetTags: []string{},
-			userTags:   []string{},
-			result: []string{
-				"tinygo",
-				"math_big_pure_go",
-				"gc.conservative",
-				"scheduler.none",
-				"serial.none",
-			},
-		},
-		{
-			targetTags: []string{"bear"},
-			userTags:   []string{},
-			result: []string{
-				"bear",
-				"tinygo",
-				"math_big_pure_go",
-				"gc.conservative",
-				"scheduler.none",
-				"serial.none",
-			},
-		},
-		{
-			targetTags: []string{},
-			userTags:   []string{"cat"},
-			result: []string{
-				"tinygo",
-				"math_big_pure_go",
-				"gc.conservative",
-				"scheduler.none",
-				"serial.none",
-				"cat",
-			},
-		},
-		{
-			targetTags: []string{"bear"},
-			userTags:   []string{"cat"},
-			result: []string{
-				"bear",
-				"tinygo",
-				"math_big_pure_go",
-				"gc.conservative",
-				"scheduler.none",
-				"serial.none",
-				"cat",
-			},
-		},
-		{
-			targetTags: []string{"bear", "runtime_memhash_leveldb"},
-			userTags:   []string{"cat"},
-			result: []string{
-				"bear",
-				"runtime_memhash_leveldb",
-				"tinygo",
-				"math_big_pure_go",
-				"gc.conservative",
-				"scheduler.none",
-				"serial.none",
-				"cat",
-			},
-		},
-		{
-			targetTags: []string{"bear", "runtime_memhash_leveldb"},
-			userTags:   []string{"cat", "runtime_memhash_leveldb"},
-			result: []string{
-				"bear",
-				"tinygo",
-				"math_big_pure_go",
-				"gc.conservative",
-				"scheduler.none",
-				"serial.none",
-				"cat",
-				"runtime_memhash_leveldb",
-			},
-		},
-		{
-			targetTags: []string{"bear", "runtime_memhash_leveldb"},
-			userTags:   []string{"cat", "runtime_memhash_sip"},
-			result: []string{
-				"bear",
-				"tinygo",
-				"math_big_pure_go",
-				"gc.conservative",
-				"scheduler.none",
-				"serial.none",
-				"cat",
-				"runtime_memhash_sip",
-			},
-		},
-	}
-
-	for _, tc := range tests {
-		tt := tc
-		t.Run(fmt.Sprintf("%s+%s", strings.Join(tt.targetTags, ","), strings.Join(tt.userTags, ",")), func(t *testing.T) {
-			c := &Config{
-				Target: &TargetSpec{
-					BuildTags: tt.targetTags,
-				},
-				Options: &Options{
-					Tags: tt.userTags,
-				},
-			}
-
-			res := c.BuildTags()
-
-			if len(res) != len(tt.result) {
-				t.Errorf("expected %d tags, got %d", len(tt.result), len(res))
-			}
-
-			for i, tag := range tt.result {
-				if tag != res[i] {
-					t.Errorf("tag %d: expected %s, got %s", i, tt.result[i], tag)
-				}
-			}
-		})
-	}
-}

compileopts/options.go

@@ -1,120 +0,0 @@
-package compileopts
-
-import (
-	"fmt"
-	"regexp"
-	"strings"
-	"time"
-)
-
-var (
-	validGCOptions            = []string{"none", "leaking", "conservative", "custom", "precise"}
-	validSchedulerOptions     = []string{"none", "tasks", "asyncify"}
-	validSerialOptions        = []string{"none", "uart", "usb"}
-	validPrintSizeOptions     = []string{"none", "short", "full"}
-	validPanicStrategyOptions = []string{"print", "trap"}
-	validOptOptions           = []string{"none", "0", "1", "2", "s", "z"}
-)
-
-// Options contains extra options to give to the compiler. These options are
-// usually passed from the command line, but can also be passed in environment
-// variables for example.
-type Options struct {
-	GOOS            string // environment variable
-	GOARCH          string // environment variable
-	GOARM           string // environment variable (only used with GOARCH=arm)
-	Target          string
-	Opt             string
-	GC              string
-	PanicStrategy   string
-	Scheduler       string
-	StackSize       uint64 // goroutine stack size (if none could be automatically determined)
-	Serial          string
-	Work            bool // -work flag to print temporary build directory
-	InterpTimeout   time.Duration
-	PrintIR         bool
-	DumpSSA         bool
-	VerifyIR        bool
-	PrintCommands   func(cmd string, args ...string) `json:"-"`
-	Semaphore       chan struct{}                    `json:"-"` // -p flag controls cap
-	Debug           bool
-	PrintSizes      string
-	PrintAllocs     *regexp.Regexp // regexp string
-	PrintStacks     bool
-	Tags            []string
-	GlobalValues    map[string]map[string]string // map[pkgpath]map[varname]value
-	TestConfig      TestConfig
-	Programmer      string
-	OpenOCDCommands []string
-	LLVMFeatures    string
-	Directory       string
-	PrintJSON       bool
-	Monitor         bool
-	BaudRate        int
-	Timeout         time.Duration
-}
-
-// Verify performs a validation on the given options, raising an error if options are not valid.
-func (o *Options) Verify() error {
-	if o.GC != "" {
-		valid := isInArray(validGCOptions, o.GC)
-		if !valid {
-			return fmt.Errorf(`invalid gc option '%s': valid values are %s`,
-				o.GC,
-				strings.Join(validGCOptions, ", "))
-		}
-	}
-
-	if o.Scheduler != "" {
-		valid := isInArray(validSchedulerOptions, o.Scheduler)
-		if !valid {
-			return fmt.Errorf(`invalid scheduler option '%s': valid values are %s`,
-				o.Scheduler,
-				strings.Join(validSchedulerOptions, ", "))
-		}
-	}
-
-	if o.Serial != "" {
-		valid := isInArray(validSerialOptions, o.Serial)
-		if !valid {
-			return fmt.Errorf(`invalid serial option '%s': valid values are %s`,
-				o.Serial,
-				strings.Join(validSerialOptions, ", "))
-		}
-	}
-
-	if o.PrintSizes != "" {
-		valid := isInArray(validPrintSizeOptions, o.PrintSizes)
-		if !valid {
-			return fmt.Errorf(`invalid size option '%s': valid values are %s`,
-				o.PrintSizes,
-				strings.Join(validPrintSizeOptions, ", "))
-		}
-	}
-
-	if o.PanicStrategy != "" {
-		valid := isInArray(validPanicStrategyOptions, o.PanicStrategy)
-		if !valid {
-			return fmt.Errorf(`invalid panic option '%s': valid values are %s`,
-				o.PanicStrategy,
-				strings.Join(validPanicStrategyOptions, ", "))
-		}
-	}
-
-	if o.Opt != "" {
-		if !isInArray(validOptOptions, o.Opt) {
-			return fmt.Errorf("invalid -opt=%s: valid values are %s", o.Opt, strings.Join(validOptOptions, ", "))
-		}
-	}
-
-	return nil
-}
-
-func isInArray(arr []string, item string) bool {
-	for _, i := range arr {
-		if i == item {
-			return true
-		}
-	}
-	return false
-}

compileopts/options_test.go

@@ -1,132 +0,0 @@
-package compileopts_test
-
-import (
-	"errors"
-	"testing"
-
-	"github.com/tinygo-org/tinygo/compileopts"
-)
-
-func TestVerifyOptions(t *testing.T) {
-
-	expectedGCError := errors.New(`invalid gc option 'incorrect': valid values are none, leaking, conservative, custom, precise`)
-	expectedSchedulerError := errors.New(`invalid scheduler option 'incorrect': valid values are none, tasks, asyncify`)
-	expectedPrintSizeError := errors.New(`invalid size option 'incorrect': valid values are none, short, full`)
-	expectedPanicStrategyError := errors.New(`invalid panic option 'incorrect': valid values are print, trap`)
-
-	testCases := []struct {
-		name          string
-		opts          compileopts.Options
-		expectedError error
-	}{
-		{
-			name: "OptionsEmpty",
-			opts: compileopts.Options{},
-		},
-		{
-			name: "InvalidGCOption",
-			opts: compileopts.Options{
-				GC: "incorrect",
-			},
-			expectedError: expectedGCError,
-		},
-		{
-			name: "GCOptionNone",
-			opts: compileopts.Options{
-				GC: "none",
-			},
-		},
-		{
-			name: "GCOptionLeaking",
-			opts: compileopts.Options{
-				GC: "leaking",
-			},
-		},
-		{
-			name: "GCOptionConservative",
-			opts: compileopts.Options{
-				GC: "conservative",
-			},
-		},
-		{
-			name: "GCOptionCustom",
-			opts: compileopts.Options{
-				GC: "custom",
-			},
-		},
-		{
-			name: "InvalidSchedulerOption",
-			opts: compileopts.Options{
-				Scheduler: "incorrect",
-			},
-			expectedError: expectedSchedulerError,
-		},
-		{
-			name: "SchedulerOptionNone",
-			opts: compileopts.Options{
-				Scheduler: "none",
-			},
-		},
-		{
-			name: "SchedulerOptionTasks",
-			opts: compileopts.Options{
-				Scheduler: "tasks",
-			},
-		},
-		{
-			name: "InvalidPrintSizeOption",
-			opts: compileopts.Options{
-				PrintSizes: "incorrect",
-			},
-			expectedError: expectedPrintSizeError,
-		},
-		{
-			name: "PrintSizeOptionNone",
-			opts: compileopts.Options{
-				PrintSizes: "none",
-			},
-		},
-		{
-			name: "PrintSizeOptionShort",
-			opts: compileopts.Options{
-				PrintSizes: "short",
-			},
-		},
-		{
-			name: "PrintSizeOptionFull",
-			opts: compileopts.Options{
-				PrintSizes: "full",
-			},
-		},
-		{
-			name: "InvalidPanicOption",
-			opts: compileopts.Options{
-				PanicStrategy: "incorrect",
-			},
-			expectedError: expectedPanicStrategyError,
-		},
-		{
-			name: "PanicOptionPrint",
-			opts: compileopts.Options{
-				PanicStrategy: "print",
-			},
-		},
-		{
-			name: "PanicOptionTrap",
-			opts: compileopts.Options{
-				PanicStrategy: "trap",
-			},
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			err := tc.opts.Verify()
-			if tc.expectedError != err {
-				if tc.expectedError.Error() != err.Error() {
-					t.Errorf("expected %v, got %v", tc.expectedError, err)
-				}
-			}
-		})
-	}
-}

compileopts/target.go

@@ -1,376 +0,0 @@
-package compileopts
-
-// This file loads a target specification from a JSON file.
-
-import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"reflect"
-	"runtime"
-	"strings"
-
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-// Target specification for a given target. Used for bare metal targets.
-//
-// The target specification is mostly inspired by Rust:
-// https://doc.rust-lang.org/nightly/nightly-rustc/rustc_target/spec/struct.TargetOptions.html
-// https://github.com/shepmaster/rust-arduino-blink-led-no-core-with-cargo/blob/master/blink/arduino.json
-type TargetSpec struct {
-	Inherits         []string `json:"inherits"`
-	Triple           string   `json:"llvm-target"`
-	CPU              string   `json:"cpu"`
-	ABI              string   `json:"target-abi"` // rougly equivalent to -mabi= flag
-	Features         string   `json:"features"`
-	GOOS             string   `json:"goos"`
-	GOARCH           string   `json:"goarch"`
-	BuildTags        []string `json:"build-tags"`
-	GC               string   `json:"gc"`
-	Scheduler        string   `json:"scheduler"`
-	Serial           string   `json:"serial"` // which serial output to use (uart, usb, none)
-	Linker           string   `json:"linker"`
-	RTLib            string   `json:"rtlib"` // compiler runtime library (libgcc, compiler-rt)
-	Libc             string   `json:"libc"`
-	AutoStackSize    *bool    `json:"automatic-stack-size"` // Determine stack size automatically at compile time.
-	DefaultStackSize uint64   `json:"default-stack-size"`   // Default stack size if the size couldn't be determined at compile time.
-	CFlags           []string `json:"cflags"`
-	LDFlags          []string `json:"ldflags"`
-	LinkerScript     string   `json:"linkerscript"`
-	ExtraFiles       []string `json:"extra-files"`
-	RP2040BootPatch  *bool    `json:"rp2040-boot-patch"` // Patch RP2040 2nd stage bootloader checksum
-	Emulator         string   `json:"emulator"`
-	FlashCommand     string   `json:"flash-command"`
-	GDB              []string `json:"gdb"`
-	PortReset        string   `json:"flash-1200-bps-reset"`
-	SerialPort       []string `json:"serial-port"` // serial port IDs in the form "vid:pid"
-	FlashMethod      string   `json:"flash-method"`
-	FlashVolume      string   `json:"msd-volume-name"`
-	FlashFilename    string   `json:"msd-firmware-name"`
-	UF2FamilyID      string   `json:"uf2-family-id"`
-	BinaryFormat     string   `json:"binary-format"`
-	OpenOCDInterface string   `json:"openocd-interface"`
-	OpenOCDTarget    string   `json:"openocd-target"`
-	OpenOCDTransport string   `json:"openocd-transport"`
-	OpenOCDCommands  []string `json:"openocd-commands"`
-	OpenOCDVerify    *bool    `json:"openocd-verify"` // enable verify when flashing with openocd
-	JLinkDevice      string   `json:"jlink-device"`
-	CodeModel        string   `json:"code-model"`
-	RelocationModel  string   `json:"relocation-model"`
-	WasmAbi          string   `json:"wasm-abi"`
-}
-
-// overrideProperties overrides all properties that are set in child into itself using reflection.
-func (spec *TargetSpec) overrideProperties(child *TargetSpec) error {
-	specType := reflect.TypeOf(spec).Elem()
-	specValue := reflect.ValueOf(spec).Elem()
-	childValue := reflect.ValueOf(child).Elem()
-
-	for i := 0; i < specType.NumField(); i++ {
-		field := specType.Field(i)
-		src := childValue.Field(i)
-		dst := specValue.Field(i)
-
-		switch kind := field.Type.Kind(); kind {
-		case reflect.String: // for strings, just copy the field of child to spec if not empty
-			if src.Len() > 0 {
-				dst.Set(src)
-			}
-		case reflect.Uint, reflect.Uint32, reflect.Uint64: // for Uint, copy if not zero
-			if src.Uint() != 0 {
-				dst.Set(src)
-			}
-		case reflect.Ptr: // for pointers, copy if not nil
-			if !src.IsNil() {
-				dst.Set(src)
-			}
-		case reflect.Slice: // for slices, append the field and check for duplicates
-			dst.Set(reflect.AppendSlice(dst, src))
-			for i := 0; i < dst.Len(); i++ {
-				v := dst.Index(i).String()
-				for j := i + 1; j < dst.Len(); j++ {
-					w := dst.Index(j).String()
-					if v == w {
-						return fmt.Errorf("duplicate value '%s' in field %s", v, field.Name)
-					}
-				}
-			}
-		default:
-			return fmt.Errorf("unknown field type: %s", kind)
-		}
-	}
-	return nil
-}
-
-// load reads a target specification from the JSON in the given io.Reader. It
-// may load more targets specified using the "inherits" property.
-func (spec *TargetSpec) load(r io.Reader) error {
-	err := json.NewDecoder(r).Decode(spec)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-// loadFromGivenStr loads the TargetSpec from the given string that could be:
-//   - targets/ directory inside the compiler sources
-//   - a relative or absolute path to custom (project specific) target specification .json file;
-//     the Inherits[] could contain the files from target folder (ex. stm32f4disco)
-//     as well as path to custom files (ex. myAwesomeProject.json)
-func (spec *TargetSpec) loadFromGivenStr(str string) error {
-	path := ""
-	if strings.HasSuffix(str, ".json") {
-		path, _ = filepath.Abs(str)
-	} else {
-		path = filepath.Join(goenv.Get("TINYGOROOT"), "targets", strings.ToLower(str)+".json")
-	}
-	fp, err := os.Open(path)
-	if err != nil {
-		return err
-	}
-	defer fp.Close()
-	return spec.load(fp)
-}
-
-// resolveInherits loads inherited targets, recursively.
-func (spec *TargetSpec) resolveInherits() error {
-	// First create a new spec with all the inherited properties.
-	newSpec := &TargetSpec{}
-	for _, name := range spec.Inherits {
-		subtarget := &TargetSpec{}
-		err := subtarget.loadFromGivenStr(name)
-		if err != nil {
-			return err
-		}
-		err = subtarget.resolveInherits()
-		if err != nil {
-			return err
-		}
-		err = newSpec.overrideProperties(subtarget)
-		if err != nil {
-			return err
-		}
-	}
-
-	// When all properties are loaded, make sure they are properly inherited.
-	err := newSpec.overrideProperties(spec)
-	if err != nil {
-		return err
-	}
-	*spec = *newSpec
-
-	return nil
-}
-
-// Load a target specification.
-func LoadTarget(options *Options) (*TargetSpec, error) {
-	if options.Target == "" {
-		// Configure based on GOOS/GOARCH environment variables (falling back to
-		// runtime.GOOS/runtime.GOARCH), and generate a LLVM target based on it.
-		var llvmarch string
-		switch options.GOARCH {
-		case "386":
-			llvmarch = "i386"
-		case "amd64":
-			llvmarch = "x86_64"
-		case "arm64":
-			llvmarch = "aarch64"
-		case "arm":
-			switch options.GOARM {
-			case "5":
-				llvmarch = "armv5"
-			case "6":
-				llvmarch = "armv6"
-			case "7":
-				llvmarch = "armv7"
-			default:
-				return nil, fmt.Errorf("invalid GOARM=%s, must be 5, 6, or 7", options.GOARM)
-			}
-		default:
-			llvmarch = options.GOARCH
-		}
-		llvmvendor := "unknown"
-		llvmos := options.GOOS
-		if llvmos == "darwin" {
-			// Use macosx* instead of darwin, otherwise darwin/arm64 will refer
-			// to iOS!
-			llvmos = "macosx10.12.0"
-			if llvmarch == "aarch64" {
-				// Looks like Apple prefers to call this architecture ARM64
-				// instead of AArch64.
-				llvmarch = "arm64"
-				llvmos = "macosx11.0.0"
-			}
-			llvmvendor = "apple"
-		}
-		// Target triples (which actually have four components, but are called
-		// triples for historical reasons) have the form:
-		//   arch-vendor-os-environment
-		target := llvmarch + "-" + llvmvendor + "-" + llvmos
-		if options.GOOS == "windows" {
-			target += "-gnu"
-		} else if options.GOARCH == "arm" {
-			target += "-gnueabihf"
-		}
-		return defaultTarget(options.GOOS, options.GOARCH, target)
-	}
-
-	// See whether there is a target specification for this target (e.g.
-	// Arduino).
-	spec := &TargetSpec{}
-	err := spec.loadFromGivenStr(options.Target)
-	if err != nil {
-		return nil, err
-	}
-	// Successfully loaded this target from a built-in .json file. Make sure
-	// it includes all parents as specified in the "inherits" key.
-	err = spec.resolveInherits()
-	if err != nil {
-		return nil, fmt.Errorf("%s : %w", options.Target, err)
-	}
-
-	if spec.Scheduler == "asyncify" {
-		spec.ExtraFiles = append(spec.ExtraFiles, "src/internal/task/task_asyncify_wasm.S")
-	}
-
-	return spec, nil
-}
-
-func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
-	// No target spec available. Use the default one, useful on most systems
-	// with a regular OS.
-	spec := TargetSpec{
-		Triple:           triple,
-		GOOS:             goos,
-		GOARCH:           goarch,
-		BuildTags:        []string{goos, goarch},
-		GC:               "precise",
-		Scheduler:        "tasks",
-		Linker:           "cc",
-		DefaultStackSize: 1024 * 64, // 64kB
-		GDB:              []string{"gdb"},
-		PortReset:        "false",
-	}
-	switch goarch {
-	case "386":
-		spec.CPU = "pentium4"
-		spec.Features = "+cx8,+fxsr,+mmx,+sse,+sse2,+x87"
-	case "amd64":
-		spec.CPU = "x86-64"
-		spec.Features = "+cx8,+fxsr,+mmx,+sse,+sse2,+x87"
-	case "arm":
-		spec.CPU = "generic"
-		spec.CFlags = append(spec.CFlags, "-fno-unwind-tables", "-fno-asynchronous-unwind-tables")
-		switch strings.Split(triple, "-")[0] {
-		case "armv5":
-			spec.Features = "+armv5t,+strict-align,-aes,-bf16,-d32,-dotprod,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-mve.fp,-neon,-sha2,-thumb-mode,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
-		case "armv6":
-			spec.Features = "+armv6,+dsp,+fp64,+strict-align,+vfp2,+vfp2sp,-aes,-d32,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fullfp16,-neon,-sha2,-thumb-mode,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
-		case "armv7":
-			spec.Features = "+armv7-a,+d32,+dsp,+fp64,+neon,+vfp2,+vfp2sp,+vfp3,+vfp3d16,+vfp3d16sp,+vfp3sp,-aes,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fullfp16,-sha2,-thumb-mode,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp"
-		}
-	case "arm64":
-		spec.CPU = "generic"
-		spec.Features = "+neon"
-	}
-	if goos == "darwin" {
-		spec.Linker = "ld.lld"
-		spec.Libc = "darwin-libSystem"
-		arch := strings.Split(triple, "-")[0]
-		platformVersion := strings.TrimPrefix(strings.Split(triple, "-")[2], "macosx")
-		spec.LDFlags = append(spec.LDFlags,
-			"-flavor", "darwin",
-			"-dead_strip",
-			"-arch", arch,
-			"-platform_version", "macos", platformVersion, platformVersion,
-		)
-	} else if goos == "linux" {
-		spec.Linker = "ld.lld"
-		spec.RTLib = "compiler-rt"
-		spec.Libc = "musl"
-		spec.LDFlags = append(spec.LDFlags, "--gc-sections")
-	} else if goos == "windows" {
-		spec.Linker = "ld.lld"
-		spec.Libc = "mingw-w64"
-		// Note: using a medium code model, low image base and no ASLR
-		// because Go doesn't really need those features. ASLR patches
-		// around issues for unsafe languages like C/C++ that are not
-		// normally present in Go (without explicitly opting in).
-		// For more discussion:
-		// https://groups.google.com/g/Golang-nuts/c/Jd9tlNc6jUE/m/Zo-7zIP_m3MJ?pli=1
-		switch goarch {
-		case "amd64":
-			spec.LDFlags = append(spec.LDFlags,
-				"-m", "i386pep",
-				"--image-base", "0x400000",
-			)
-		case "arm64":
-			spec.LDFlags = append(spec.LDFlags,
-				"-m", "arm64pe",
-			)
-		}
-		spec.LDFlags = append(spec.LDFlags,
-			"-Bdynamic",
-			"--gc-sections",
-			"--no-insert-timestamp",
-			"--no-dynamicbase",
-		)
-	} else {
-		spec.LDFlags = append(spec.LDFlags, "-no-pie", "-Wl,--gc-sections") // WARNING: clang < 5.0 requires -nopie
-	}
-	if goarch != "wasm" {
-		suffix := ""
-		if goos == "windows" && goarch == "amd64" {
-			// Windows uses a different calling convention on amd64 from other
-			// operating systems so we need separate assembly files.
-			suffix = "_windows"
-		}
-		spec.ExtraFiles = append(spec.ExtraFiles, "src/runtime/asm_"+goarch+suffix+".S")
-		spec.ExtraFiles = append(spec.ExtraFiles, "src/internal/task/task_stack_"+goarch+suffix+".S")
-	}
-	if goarch != runtime.GOARCH {
-		// Some educated guesses as to how to invoke helper programs.
-		spec.GDB = []string{"gdb-multiarch"}
-		if goos == "linux" {
-			switch goarch {
-			case "386":
-				// amd64 can _usually_ run 32-bit programs, so skip the emulator in that case.
-				if runtime.GOARCH != "amd64" {
-					spec.Emulator = "qemu-i386 {}"
-				}
-			case "amd64":
-				spec.Emulator = "qemu-x86_64 {}"
-			case "arm":
-				spec.Emulator = "qemu-arm {}"
-			case "arm64":
-				spec.Emulator = "qemu-aarch64 {}"
-			}
-		}
-	}
-	if goos != runtime.GOOS {
-		if goos == "windows" {
-			spec.Emulator = "wine {}"
-		}
-	}
-	return &spec, nil
-}
-
-// LookupGDB looks up a gdb executable.
-func (spec *TargetSpec) LookupGDB() (string, error) {
-	if len(spec.GDB) == 0 {
-		return "", errors.New("gdb not configured in the target specification")
-	}
-	for _, d := range spec.GDB {
-		_, err := exec.LookPath(d)
-		if err == nil {
-			return d, nil
-		}
-	}
-	return "", errors.New("no gdb found configured in the target specification (" + strings.Join(spec.GDB, ", ") + ")")
-}

compileopts/target_test.go

@@ -1,83 +0,0 @@
-package compileopts
-
-import (
-	"errors"
-	"io/fs"
-	"reflect"
-	"testing"
-)
-
-func TestLoadTarget(t *testing.T) {
-	_, err := LoadTarget(&Options{Target: "arduino"})
-	if err != nil {
-		t.Error("LoadTarget test failed:", err)
-	}
-
-	_, err = LoadTarget(&Options{Target: "notexist"})
-	if err == nil {
-		t.Error("LoadTarget should have failed with non existing target")
-	}
-
-	if !errors.Is(err, fs.ErrNotExist) {
-		t.Error("LoadTarget failed for wrong reason:", err)
-	}
-}
-
-func TestOverrideProperties(t *testing.T) {
-	baseAutoStackSize := true
-	base := &TargetSpec{
-		GOOS:             "baseGoos",
-		CPU:              "baseCpu",
-		CFlags:           []string{"-base-foo", "-base-bar"},
-		BuildTags:        []string{"bt1", "bt2"},
-		DefaultStackSize: 42,
-		AutoStackSize:    &baseAutoStackSize,
-	}
-	childAutoStackSize := false
-	child := &TargetSpec{
-		GOOS:             "",
-		CPU:              "chlidCpu",
-		CFlags:           []string{"-child-foo", "-child-bar"},
-		AutoStackSize:    &childAutoStackSize,
-		DefaultStackSize: 64,
-	}
-
-	base.overrideProperties(child)
-
-	if base.GOOS != "baseGoos" {
-		t.Errorf("Overriding failed : got %v", base.GOOS)
-	}
-	if base.CPU != "chlidCpu" {
-		t.Errorf("Overriding failed : got %v", base.CPU)
-	}
-	if !reflect.DeepEqual(base.CFlags, []string{"-base-foo", "-base-bar", "-child-foo", "-child-bar"}) {
-		t.Errorf("Overriding failed : got %v", base.CFlags)
-	}
-	if !reflect.DeepEqual(base.BuildTags, []string{"bt1", "bt2"}) {
-		t.Errorf("Overriding failed : got %v", base.BuildTags)
-	}
-	if *base.AutoStackSize != false {
-		t.Errorf("Overriding failed : got %v", base.AutoStackSize)
-	}
-	if base.DefaultStackSize != 64 {
-		t.Errorf("Overriding failed : got %v", base.DefaultStackSize)
-	}
-
-	baseAutoStackSize = true
-	base = &TargetSpec{
-		AutoStackSize:    &baseAutoStackSize,
-		DefaultStackSize: 42,
-	}
-	child = &TargetSpec{
-		AutoStackSize:    nil,
-		DefaultStackSize: 0,
-	}
-	base.overrideProperties(child)
-	if *base.AutoStackSize != true {
-		t.Errorf("Overriding failed : got %v", base.AutoStackSize)
-	}
-	if base.DefaultStackSize != 42 {
-		t.Errorf("Overriding failed : got %v", base.DefaultStackSize)
-	}
-
-}

compiler/alias.go

@@ -1,61 +0,0 @@
-package compiler
-
-// This file defines alias functions for functions that are normally defined in
-// Go assembly.
-//
-// The Go toolchain defines many performance critical functions in assembly
-// instead of plain Go. This is a problem for TinyGo as it currently (as of
-// august 2021) is not able to compile these assembly files and even if it
-// could, it would not be able to make use of them for many targets that are
-// supported by TinyGo (baremetal RISC-V, AVR, etc). Therefore, many of these
-// functions are aliased to their generic Go implementation.
-// This results in slower than possible implementations, but at least they are
-// usable.
-
-import "tinygo.org/x/go-llvm"
-
-var stdlibAliases = map[string]string{
-	// crypto packages
-	"crypto/ed25519/internal/edwards25519/field.feMul":    "crypto/ed25519/internal/edwards25519/field.feMulGeneric",
-	"crypto/ed25519/internal/edwards25519/field.feSquare": "crypto/ed25519/internal/edwards25519/field.feSquareGeneric",
-	"crypto/md5.block":         "crypto/md5.blockGeneric",
-	"crypto/sha1.block":        "crypto/sha1.blockGeneric",
-	"crypto/sha1.blockAMD64":   "crypto/sha1.blockGeneric",
-	"crypto/sha256.block":      "crypto/sha256.blockGeneric",
-	"crypto/sha512.blockAMD64": "crypto/sha512.blockGeneric",
-
-	// math package
-	"math.archHypot": "math.hypot",
-	"math.archMax":   "math.max",
-	"math.archMin":   "math.min",
-	"math.archModf":  "math.modf",
-}
-
-// createAlias implements the function (in the builder) as a call to the alias
-// function.
-func (b *builder) createAlias(alias llvm.Value) {
-	b.llvmFn.SetVisibility(llvm.HiddenVisibility)
-	b.llvmFn.SetUnnamedAddr(true)
-
-	if b.Debug {
-		if b.fn.Syntax() != nil {
-			// Create debug info file if present.
-			b.difunc = b.attachDebugInfo(b.fn)
-		}
-		pos := b.program.Fset.Position(b.fn.Pos())
-		b.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), b.difunc, llvm.Metadata{})
-	}
-	entryBlock := b.ctx.AddBasicBlock(b.llvmFn, "entry")
-	b.SetInsertPointAtEnd(entryBlock)
-	if b.llvmFn.Type() != alias.Type() {
-		b.addError(b.fn.Pos(), "alias function should have the same type as aliasee "+alias.Name())
-		b.CreateUnreachable()
-		return
-	}
-	result := b.CreateCall(alias.GlobalValueType(), alias, b.llvmFn.Params(), "")
-	if result.Type().TypeKind() == llvm.VoidTypeKind {
-		b.CreateRetVoid()
-	} else {
-		b.CreateRet(result)
-	}
-}

compiler/asserts.go

@@ -1,276 +0,0 @@
-package compiler
-
-// This file implements functions that do certain safety checks that are
-// required by the Go programming language.
-
-import (
-	"fmt"
-	"go/token"
-	"go/types"
-
-	"golang.org/x/tools/go/ssa"
-	"tinygo.org/x/go-llvm"
-)
-
-// createLookupBoundsCheck emits a bounds check before doing a lookup into a
-// slice. This is required by the Go language spec: an index out of bounds must
-// cause a panic.
-// The caller should make sure that index is at least as big as arrayLen.
-func (b *builder) createLookupBoundsCheck(arrayLen, index llvm.Value) {
-	if b.info.nobounds {
-		// The //go:nobounds pragma was added to the function to avoid bounds
-		// checking.
-		return
-	}
-
-	// Extend arrayLen if it's too small.
-	if index.Type().IntTypeWidth() > arrayLen.Type().IntTypeWidth() {
-		// The index is bigger than the array length type, so extend it.
-		arrayLen = b.CreateZExt(arrayLen, index.Type(), "")
-	}
-
-	// Now do the bounds check: index >= arrayLen
-	outOfBounds := b.CreateICmp(llvm.IntUGE, index, arrayLen, "")
-	b.createRuntimeAssert(outOfBounds, "lookup", "lookupPanic")
-}
-
-// createSliceBoundsCheck emits a bounds check before a slicing operation to make
-// sure it is within bounds.
-//
-// This function is both used for slicing a slice (low and high have their
-// normal meaning) and for creating a new slice, where 'capacity' means the
-// biggest possible slice capacity, 'low' means len and 'high' means cap. The
-// logic is the same in both cases.
-func (b *builder) createSliceBoundsCheck(capacity, low, high, max llvm.Value, lowType, highType, maxType *types.Basic) {
-	if b.info.nobounds {
-		// The //go:nobounds pragma was added to the function to avoid bounds
-		// checking.
-		return
-	}
-
-	// Extend the capacity integer to be at least as wide as low and high.
-	capacityType := capacity.Type()
-	if low.Type().IntTypeWidth() > capacityType.IntTypeWidth() {
-		capacityType = low.Type()
-	}
-	if high.Type().IntTypeWidth() > capacityType.IntTypeWidth() {
-		capacityType = high.Type()
-	}
-	if max.Type().IntTypeWidth() > capacityType.IntTypeWidth() {
-		capacityType = max.Type()
-	}
-	if capacityType != capacity.Type() {
-		capacity = b.CreateZExt(capacity, capacityType, "")
-	}
-
-	// Extend low and high to be the same size as capacity.
-	low = b.extendInteger(low, lowType, capacityType)
-	high = b.extendInteger(high, highType, capacityType)
-	max = b.extendInteger(max, maxType, capacityType)
-
-	// Now do the bounds check: low > high || high > capacity
-	outOfBounds1 := b.CreateICmp(llvm.IntUGT, low, high, "slice.lowhigh")
-	outOfBounds2 := b.CreateICmp(llvm.IntUGT, high, max, "slice.highmax")
-	outOfBounds3 := b.CreateICmp(llvm.IntUGT, max, capacity, "slice.maxcap")
-	outOfBounds := b.CreateOr(outOfBounds1, outOfBounds2, "slice.lowmax")
-	outOfBounds = b.CreateOr(outOfBounds, outOfBounds3, "slice.lowcap")
-	b.createRuntimeAssert(outOfBounds, "slice", "slicePanic")
-}
-
-// createSliceToArrayPointerCheck adds a check for slice-to-array pointer
-// conversions. This conversion was added in Go 1.17. For details, see:
-// https://tip.golang.org/ref/spec#Conversions_from_slice_to_array_pointer
-func (b *builder) createSliceToArrayPointerCheck(sliceLen llvm.Value, arrayLen int64) {
-	// From the spec:
-	// > If the length of the slice is less than the length of the array, a
-	// > run-time panic occurs.
-	arrayLenValue := llvm.ConstInt(b.uintptrType, uint64(arrayLen), false)
-	isLess := b.CreateICmp(llvm.IntULT, sliceLen, arrayLenValue, "")
-	b.createRuntimeAssert(isLess, "slicetoarray", "sliceToArrayPointerPanic")
-}
-
-// createUnsafeSliceStringCheck inserts a runtime check used for unsafe.Slice
-// and unsafe.String. This function must panic if the ptr/len parameters are
-// invalid.
-func (b *builder) createUnsafeSliceStringCheck(name string, ptr, len llvm.Value, elementType llvm.Type, lenType *types.Basic) {
-	// From the documentation of unsafe.Slice and unsafe.String:
-	//   > At run time, if len is negative, or if ptr is nil and len is not
-	//   > zero, a run-time panic occurs.
-	// However, in practice, it is also necessary to check that the length is
-	// not too big that a GEP wouldn't be possible without wrapping the pointer.
-	// These two checks (non-negative and not too big) can be merged into one
-	// using an unsiged greater than.
-
-	// Make sure the len value is at least as big as a uintptr.
-	len = b.extendInteger(len, lenType, b.uintptrType)
-
-	// Determine the maximum slice size, and therefore the maximum value of the
-	// len parameter.
-	maxSize := b.maxSliceSize(elementType)
-	maxSizeValue := llvm.ConstInt(len.Type(), maxSize, false)
-
-	// Do the check. By using unsigned greater than for the length check, signed
-	// negative values are also checked (which are very large numbers when
-	// interpreted as signed values).
-	zero := llvm.ConstInt(len.Type(), 0, false)
-	lenOutOfBounds := b.CreateICmp(llvm.IntUGT, len, maxSizeValue, "")
-	ptrIsNil := b.CreateICmp(llvm.IntEQ, ptr, llvm.ConstNull(ptr.Type()), "")
-	lenIsNotZero := b.CreateICmp(llvm.IntNE, len, zero, "")
-	assert := b.CreateAnd(ptrIsNil, lenIsNotZero, "")
-	assert = b.CreateOr(assert, lenOutOfBounds, "")
-	b.createRuntimeAssert(assert, name, "unsafeSlicePanic")
-}
-
-// createChanBoundsCheck creates a bounds check before creating a new channel to
-// check that the value is not too big for runtime.chanMake.
-func (b *builder) createChanBoundsCheck(elementSize uint64, bufSize llvm.Value, bufSizeType *types.Basic, pos token.Pos) {
-	if b.info.nobounds {
-		// The //go:nobounds pragma was added to the function to avoid bounds
-		// checking.
-		return
-	}
-
-	// Make sure bufSize is at least as big as maxBufSize (an uintptr).
-	bufSize = b.extendInteger(bufSize, bufSizeType, b.uintptrType)
-
-	// Calculate (^uintptr(0)) >> 1, which is the max value that fits in an
-	// uintptr if uintptrs were signed.
-	maxBufSize := llvm.ConstLShr(llvm.ConstNot(llvm.ConstInt(b.uintptrType, 0, false)), llvm.ConstInt(b.uintptrType, 1, false))
-	if elementSize > maxBufSize.ZExtValue() {
-		b.addError(pos, fmt.Sprintf("channel element type is too big (%v bytes)", elementSize))
-		return
-	}
-	// Avoid divide-by-zero.
-	if elementSize == 0 {
-		elementSize = 1
-	}
-	// Make the maxBufSize actually the maximum allowed value (in number of
-	// elements in the channel buffer).
-	maxBufSize = b.CreateUDiv(maxBufSize, llvm.ConstInt(b.uintptrType, elementSize, false), "")
-
-	// Make sure maxBufSize has the same type as bufSize.
-	if maxBufSize.Type() != bufSize.Type() {
-		maxBufSize = llvm.ConstZExt(maxBufSize, bufSize.Type())
-	}
-
-	// Do the check for a too large (or negative) buffer size.
-	bufSizeTooBig := b.CreateICmp(llvm.IntUGE, bufSize, maxBufSize, "")
-	b.createRuntimeAssert(bufSizeTooBig, "chan", "chanMakePanic")
-}
-
-// createNilCheck checks whether the given pointer is nil, and panics if it is.
-// It has no effect in well-behaved programs, but makes sure no uncaught nil
-// pointer dereferences exist in valid Go code.
-func (b *builder) createNilCheck(inst ssa.Value, ptr llvm.Value, blockPrefix string) {
-	// Check whether we need to emit this check at all.
-	if !ptr.IsAGlobalValue().IsNil() {
-		return
-	}
-
-	switch inst := inst.(type) {
-	case *ssa.Alloc:
-		// An alloc is never nil.
-		return
-	case *ssa.FreeVar:
-		// A free variable is allocated in a parent function and is thus never
-		// nil.
-		return
-	case *ssa.IndexAddr:
-		// This pointer is the result of an index operation into a slice or
-		// array. Such slices/arrays are already bounds checked so the pointer
-		// must be a valid (non-nil) pointer. No nil checking is necessary.
-		return
-	case *ssa.Convert:
-		// This is a pointer that comes from a conversion from unsafe.Pointer.
-		// Don't do nil checking because this is unsafe code and the code should
-		// know what it is doing.
-		// Note: all *ssa.Convert instructions that result in a pointer must
-		// come from unsafe.Pointer. Testing here for unsafe.Pointer to be sure.
-		if inst.X.Type() == types.Typ[types.UnsafePointer] {
-			return
-		}
-	}
-
-	// Compare against nil.
-	// We previously used a hack to make sure this wouldn't break escape
-	// analysis, but this is not necessary anymore since
-	// https://reviews.llvm.org/D60047 has been merged.
-	nilptr := llvm.ConstPointerNull(ptr.Type())
-	isnil := b.CreateICmp(llvm.IntEQ, ptr, nilptr, "")
-
-	// Emit the nil check in IR.
-	b.createRuntimeAssert(isnil, blockPrefix, "nilPanic")
-}
-
-// createNegativeShiftCheck creates an assertion that panics if the given shift value is negative.
-// This function assumes that the shift value is signed.
-func (b *builder) createNegativeShiftCheck(shift llvm.Value) {
-	if b.info.nobounds {
-		// Function disabled bounds checking - skip shift check.
-		return
-	}
-
-	// isNegative = shift < 0
-	isNegative := b.CreateICmp(llvm.IntSLT, shift, llvm.ConstInt(shift.Type(), 0, false), "")
-	b.createRuntimeAssert(isNegative, "shift", "negativeShiftPanic")
-}
-
-// createDivideByZeroCheck asserts that y is not zero. If it is, a runtime panic
-// will be emitted. This follows the Go specification which says that a divide
-// by zero must cause a run time panic.
-func (b *builder) createDivideByZeroCheck(y llvm.Value) {
-	if b.info.nobounds {
-		return
-	}
-
-	// isZero = y == 0
-	isZero := b.CreateICmp(llvm.IntEQ, y, llvm.ConstInt(y.Type(), 0, false), "")
-	b.createRuntimeAssert(isZero, "divbyzero", "divideByZeroPanic")
-}
-
-// createRuntimeAssert is a common function to create a new branch on an assert
-// bool, calling an assert func if the assert value is true (1).
-func (b *builder) createRuntimeAssert(assert llvm.Value, blockPrefix, assertFunc string) {
-	// Check whether we can resolve this check at compile time.
-	if !assert.IsAConstantInt().IsNil() {
-		val := assert.ZExtValue()
-		if val == 0 {
-			// Everything is constant so the check does not have to be emitted
-			// in IR. This avoids emitting some redundant IR.
-			return
-		}
-	}
-
-	// Put the fault block at the end of the function and the next block at the
-	// current insert position.
-	faultBlock := b.ctx.AddBasicBlock(b.llvmFn, blockPrefix+".throw")
-	nextBlock := b.insertBasicBlock(blockPrefix + ".next")
-	b.blockExits[b.currentBlock] = nextBlock // adjust outgoing block for phi nodes
-
-	// Now branch to the out-of-bounds or the regular block.
-	b.CreateCondBr(assert, faultBlock, nextBlock)
-
-	// Fail: the assert triggered so panic.
-	b.SetInsertPointAtEnd(faultBlock)
-	b.createRuntimeCall(assertFunc, nil, "")
-	b.CreateUnreachable()
-
-	// Ok: assert didn't trigger so continue normally.
-	b.SetInsertPointAtEnd(nextBlock)
-}
-
-// extendInteger extends the value to at least targetType using a zero or sign
-// extend. The resulting value is not truncated: it may still be bigger than
-// targetType.
-func (b *builder) extendInteger(value llvm.Value, valueType types.Type, targetType llvm.Type) llvm.Value {
-	if value.Type().IntTypeWidth() < targetType.IntTypeWidth() {
-		if valueType.Underlying().(*types.Basic).Info()&types.IsUnsigned != 0 {
-			// Unsigned, so zero-extend to the target type.
-			value = b.CreateZExt(value, targetType, "")
-		} else {
-			// Signed, so sign-extend to the target type.
-			value = b.CreateSExt(value, targetType, "")
-		}
-	}
-	return value
-}

compiler/atomic.go

@@ -1,92 +0,0 @@
-package compiler
-
-import (
-	"fmt"
-	"strings"
-
-	"tinygo.org/x/go-llvm"
-)
-
-// createAtomicOp lowers a sync/atomic function by lowering it as an LLVM atomic
-// operation. It returns the result of the operation, or a zero llvm.Value if
-// the result is void.
-func (b *builder) createAtomicOp(name string) llvm.Value {
-	switch name {
-	case "AddInt32", "AddInt64", "AddUint32", "AddUint64", "AddUintptr":
-		ptr := b.getValue(b.fn.Params[0], getPos(b.fn))
-		val := b.getValue(b.fn.Params[1], getPos(b.fn))
-		if strings.HasPrefix(b.Triple, "avr") {
-			// AtomicRMW does not work on AVR as intended:
-			// - There are some register allocation issues (fixed by https://reviews.llvm.org/D97127 which is not yet in a usable LLVM release)
-			// - The result is the new value instead of the old value
-			vType := val.Type()
-			name := fmt.Sprintf("__sync_fetch_and_add_%d", vType.IntTypeWidth()/8)
-			fn := b.mod.NamedFunction(name)
-			if fn.IsNil() {
-				fn = llvm.AddFunction(b.mod, name, llvm.FunctionType(vType, []llvm.Type{ptr.Type(), vType}, false))
-			}
-			oldVal := b.createCall(fn.GlobalValueType(), fn, []llvm.Value{ptr, val}, "")
-			// Return the new value, not the original value returned.
-			return b.CreateAdd(oldVal, val, "")
-		}
-		oldVal := b.CreateAtomicRMW(llvm.AtomicRMWBinOpAdd, ptr, val, llvm.AtomicOrderingSequentiallyConsistent, true)
-		// Return the new value, not the original value returned by atomicrmw.
-		return b.CreateAdd(oldVal, val, "")
-	case "SwapInt32", "SwapInt64", "SwapUint32", "SwapUint64", "SwapUintptr", "SwapPointer":
-		ptr := b.getValue(b.fn.Params[0], getPos(b.fn))
-		val := b.getValue(b.fn.Params[1], getPos(b.fn))
-		isPointer := val.Type().TypeKind() == llvm.PointerTypeKind
-		if isPointer {
-			// atomicrmw only supports integers, so cast to an integer.
-			// TODO: this is fixed in LLVM 15.
-			val = b.CreatePtrToInt(val, b.uintptrType, "")
-			ptr = b.CreateBitCast(ptr, llvm.PointerType(val.Type(), 0), "")
-		}
-		oldVal := b.CreateAtomicRMW(llvm.AtomicRMWBinOpXchg, ptr, val, llvm.AtomicOrderingSequentiallyConsistent, true)
-		if isPointer {
-			oldVal = b.CreateIntToPtr(oldVal, b.i8ptrType, "")
-		}
-		return oldVal
-	case "CompareAndSwapInt32", "CompareAndSwapInt64", "CompareAndSwapUint32", "CompareAndSwapUint64", "CompareAndSwapUintptr", "CompareAndSwapPointer":
-		ptr := b.getValue(b.fn.Params[0], getPos(b.fn))
-		old := b.getValue(b.fn.Params[1], getPos(b.fn))
-		newVal := b.getValue(b.fn.Params[2], getPos(b.fn))
-		tuple := b.CreateAtomicCmpXchg(ptr, old, newVal, llvm.AtomicOrderingSequentiallyConsistent, llvm.AtomicOrderingSequentiallyConsistent, true)
-		swapped := b.CreateExtractValue(tuple, 1, "")
-		return swapped
-	case "LoadInt32", "LoadInt64", "LoadUint32", "LoadUint64", "LoadUintptr", "LoadPointer":
-		ptr := b.getValue(b.fn.Params[0], getPos(b.fn))
-		val := b.CreateLoad(b.getLLVMType(b.fn.Signature.Results().At(0).Type()), ptr, "")
-		val.SetOrdering(llvm.AtomicOrderingSequentiallyConsistent)
-		val.SetAlignment(b.targetData.PrefTypeAlignment(val.Type())) // required
-		return val
-	case "StoreInt32", "StoreInt64", "StoreUint32", "StoreUint64", "StoreUintptr", "StorePointer":
-		ptr := b.getValue(b.fn.Params[0], getPos(b.fn))
-		val := b.getValue(b.fn.Params[1], getPos(b.fn))
-		if strings.HasPrefix(b.Triple, "avr") {
-			// SelectionDAGBuilder is currently missing the "are unaligned atomics allowed" check for stores.
-			vType := val.Type()
-			isPointer := vType.TypeKind() == llvm.PointerTypeKind
-			if isPointer {
-				// libcalls only supports integers, so cast to an integer.
-				vType = b.uintptrType
-				val = b.CreatePtrToInt(val, vType, "")
-				ptr = b.CreateBitCast(ptr, llvm.PointerType(vType, 0), "")
-			}
-			name := fmt.Sprintf("__atomic_store_%d", vType.IntTypeWidth()/8)
-			fn := b.mod.NamedFunction(name)
-			if fn.IsNil() {
-				fn = llvm.AddFunction(b.mod, name, llvm.FunctionType(vType, []llvm.Type{ptr.Type(), vType, b.uintptrType}, false))
-			}
-			b.createCall(fn.GlobalValueType(), fn, []llvm.Value{ptr, val, llvm.ConstInt(b.uintptrType, 5, false)}, "")
-			return llvm.Value{}
-		}
-		store := b.CreateStore(val, ptr)
-		store.SetOrdering(llvm.AtomicOrderingSequentiallyConsistent)
-		store.SetAlignment(b.targetData.PrefTypeAlignment(val.Type())) // required
-		return llvm.Value{}
-	default:
-		b.addError(b.fn.Pos(), "unknown atomic operation: "+b.fn.Name())
-		return llvm.Value{}
-	}
-}

compiler/calls.go

@@ -1,11 +1,8 @@
 package compiler
 
 import (
-	"go/types"
-	"strconv"
-
+	"github.com/aykevl/go-llvm"
 	"golang.org/x/tools/go/ssa"
-	"tinygo.org/x/go-llvm"
 )
 
 // For a description of the calling convention in prose, see:
@@ -13,123 +10,58 @@ import (
 
 // The maximum number of arguments that can be expanded from a single struct. If
 // a struct contains more fields, it is passed as a struct without expanding.
-const maxFieldsPerParam = 3
+const MaxFieldsPerParam = 3
 
-// paramInfo contains some information collected about a function parameter,
-// useful while declaring or defining a function.
-type paramInfo struct {
-	llvmType llvm.Type
-	name     string // name, possibly with suffixes for e.g. struct fields
-	elemSize uint64 // size of pointer element type, or 0 if this isn't a pointer
-}
-
-// paramFlags identifies parameter attributes for flags. Most importantly, it
-// determines which parameters are dereferenceable_or_null and which aren't.
-type paramFlags uint8
-
-const (
-	// Parameter may have the deferenceable_or_null attribute. This attribute
-	// cannot be applied to unsafe.Pointer and to the data pointer of slices.
-	paramIsDeferenceableOrNull = 1 << iota
-)
-
-// createRuntimeCallCommon creates a runtime call. Use createRuntimeCall or
-// createRuntimeInvoke instead.
-func (b *builder) createRuntimeCallCommon(fnName string, args []llvm.Value, name string, isInvoke bool) llvm.Value {
-	fn := b.program.ImportedPackage("runtime").Members[fnName].(*ssa.Function)
-	fnType, llvmFn := b.getFunction(fn)
-	if llvmFn.IsNil() {
-		panic("trying to call non-existent function: " + fn.RelString(nil))
+// Shortcut: create a call to runtime.<fnName> with the given arguments.
+func (c *Compiler) createRuntimeCall(fnName string, args []llvm.Value, name string) llvm.Value {
+	runtimePkg := c.ir.Program.ImportedPackage("runtime")
+	member := runtimePkg.Members[fnName]
+	if member == nil {
+		panic("trying to call runtime." + fnName)
 	}
-	args = append(args, llvm.Undef(b.i8ptrType)) // unused context parameter
-	if isInvoke {
-		return b.createInvoke(fnType, llvmFn, args, name)
+	fn := c.ir.GetFunction(member.(*ssa.Function))
+	if !fn.IsExported() {
+		args = append(args, llvm.Undef(c.i8ptrType)) // unused context parameter
 	}
-	return b.createCall(fnType, llvmFn, args, name)
+	return c.createCall(fn.LLVMFn, args, name)
 }
 
-// createRuntimeCall creates a new call to runtime.<fnName> with the given
-// arguments.
-func (b *builder) createRuntimeCall(fnName string, args []llvm.Value, name string) llvm.Value {
-	return b.createRuntimeCallCommon(fnName, args, name, false)
-}
-
-// createRuntimeInvoke creates a new call to runtime.<fnName> with the given
-// arguments. If the runtime call panics, control flow is diverted to the
-// landing pad block.
-// Note that "invoke" here is meant in the LLVM sense (a call that can
-// panic/throw), not in the Go sense (an interface method call).
-func (b *builder) createRuntimeInvoke(fnName string, args []llvm.Value, name string) llvm.Value {
-	return b.createRuntimeCallCommon(fnName, args, name, true)
-}
-
-// createCall creates a call to the given function with the arguments possibly
-// expanded.
-func (b *builder) createCall(fnType llvm.Type, fn llvm.Value, args []llvm.Value, name string) llvm.Value {
+// Create a call to the given function with the arguments possibly expanded.
+func (c *Compiler) createCall(fn llvm.Value, args []llvm.Value, name string) llvm.Value {
 	expanded := make([]llvm.Value, 0, len(args))
 	for _, arg := range args {
-		fragments := b.expandFormalParam(arg)
+		fragments := c.expandFormalParam(arg)
 		expanded = append(expanded, fragments...)
 	}
-	return b.CreateCall(fnType, fn, expanded, name)
-}
-
-// createInvoke is like createCall but continues execution at the landing pad if
-// the call resulted in a panic.
-func (b *builder) createInvoke(fnType llvm.Type, fn llvm.Value, args []llvm.Value, name string) llvm.Value {
-	if b.hasDeferFrame() {
-		b.createInvokeCheckpoint()
-	}
-	return b.createCall(fnType, fn, args, name)
+	return c.builder.CreateCall(fn, expanded, name)
 }
 
 // Expand an argument type to a list that can be used in a function call
-// parameter list.
-func (c *compilerContext) expandFormalParamType(t llvm.Type, name string, goType types.Type) []paramInfo {
+// paramter list.
+func (c *Compiler) expandFormalParamType(t llvm.Type) []llvm.Type {
 	switch t.TypeKind() {
 	case llvm.StructTypeKind:
-		fieldInfos := c.flattenAggregateType(t, name, goType)
-		if len(fieldInfos) <= maxFieldsPerParam {
-			// managed to expand this parameter
-			return fieldInfos
-		}
-		// failed to expand this parameter: too many fields
-	}
-	// TODO: split small arrays
-	return []paramInfo{c.getParamInfo(t, name, goType)}
-}
-
-// expandFormalParamOffsets returns a list of offsets from the start of an
-// object of type t after it would have been split up by expandFormalParam. This
-// is useful for debug information, where it is necessary to know the offset
-// from the start of the combined object.
-func (b *builder) expandFormalParamOffsets(t llvm.Type) []uint64 {
-	switch t.TypeKind() {
-	case llvm.StructTypeKind:
-		fields := b.flattenAggregateTypeOffsets(t)
-		if len(fields) <= maxFieldsPerParam {
+		fields := c.flattenAggregateType(t)
+		if len(fields) <= MaxFieldsPerParam {
 			return fields
 		} else {
 			// failed to lower
-			return []uint64{0}
+			return []llvm.Type{t}
 		}
 	default:
 		// TODO: split small arrays
-		return []uint64{0}
+		return []llvm.Type{t}
 	}
 }
 
-// expandFormalParam splits a formal param value into pieces, so it can be
-// passed directly as part of a function call. For example, it splits up small
-// structs into individual fields. It is the equivalent of expandFormalParamType
-// for parameter values.
-func (b *builder) expandFormalParam(v llvm.Value) []llvm.Value {
+// Equivalent of expandFormalParamType for parameter values.
+func (c *Compiler) expandFormalParam(v llvm.Value) []llvm.Value {
 	switch v.Type().TypeKind() {
 	case llvm.StructTypeKind:
-		fieldInfos := b.flattenAggregateType(v.Type(), "", nil)
-		if len(fieldInfos) <= maxFieldsPerParam {
-			fields := b.flattenAggregate(v)
-			if len(fields) != len(fieldInfos) {
+		fieldTypes := c.flattenAggregateType(v.Type())
+		if len(fieldTypes) <= MaxFieldsPerParam {
+			fields := c.flattenAggregate(v)
+			if len(fields) != len(fieldTypes) {
 				panic("type and value param lowering don't match")
 			}
 			return fields
@@ -145,129 +77,29 @@ func (b *builder) expandFormalParam(v llvm.Value) []llvm.Value {
 
 // Try to flatten a struct type to a list of types. Returns a 1-element slice
 // with the passed in type if this is not possible.
-func (c *compilerContext) flattenAggregateType(t llvm.Type, name string, goType types.Type) []paramInfo {
+func (c *Compiler) flattenAggregateType(t llvm.Type) []llvm.Type {
 	switch t.TypeKind() {
 	case llvm.StructTypeKind:
-		var paramInfos []paramInfo
-		for i, subfield := range t.StructElementTypes() {
-			if c.targetData.TypeAllocSize(subfield) == 0 {
-				continue
-			}
-			suffix := strconv.Itoa(i)
-			if goType != nil {
-				// Try to come up with a good suffix for this struct field,
-				// depending on which Go type it's based on.
-				switch goType := goType.Underlying().(type) {
-				case *types.Interface:
-					suffix = []string{"typecode", "value"}[i]
-				case *types.Slice:
-					suffix = []string{"data", "len", "cap"}[i]
-				case *types.Struct:
-					suffix = goType.Field(i).Name()
-				case *types.Basic:
-					switch goType.Kind() {
-					case types.Complex64, types.Complex128:
-						suffix = []string{"r", "i"}[i]
-					case types.String:
-						suffix = []string{"data", "len"}[i]
-					}
-				case *types.Signature:
-					suffix = []string{"context", "funcptr"}[i]
-				}
-			}
-			subInfos := c.flattenAggregateType(subfield, name+"."+suffix, extractSubfield(goType, i))
-			paramInfos = append(paramInfos, subInfos...)
-		}
-		return paramInfos
-	default:
-		return []paramInfo{c.getParamInfo(t, name, goType)}
-	}
-}
-
-// getParamInfo collects information about a parameter. For example, if this
-// parameter is pointer-like, it will also store the element type for the
-// dereferenceable_or_null attribute.
-func (c *compilerContext) getParamInfo(t llvm.Type, name string, goType types.Type) paramInfo {
-	info := paramInfo{
-		llvmType: t,
-		name:     name,
-	}
-	if goType != nil {
-		switch underlying := goType.Underlying().(type) {
-		case *types.Pointer:
-			// Pointers in Go must either point to an object or be nil.
-			info.elemSize = c.targetData.TypeAllocSize(c.getLLVMType(underlying.Elem()))
-		case *types.Chan:
-			// Channels are implemented simply as a *runtime.channel.
-			info.elemSize = c.targetData.TypeAllocSize(c.getLLVMRuntimeType("channel"))
-		case *types.Map:
-			// Maps are similar to channels: they are implemented as a
-			// *runtime.hashmap.
-			info.elemSize = c.targetData.TypeAllocSize(c.getLLVMRuntimeType("hashmap"))
-		}
-	}
-	return info
-}
-
-// extractSubfield extracts a field from a struct, or returns null if this is
-// not a struct and thus no subfield can be obtained.
-func extractSubfield(t types.Type, field int) types.Type {
-	if t == nil {
-		return nil
-	}
-	switch t := t.Underlying().(type) {
-	case *types.Struct:
-		return t.Field(field).Type()
-	case *types.Interface, *types.Slice, *types.Basic, *types.Signature:
-		// These Go types are (sometimes) implemented as LLVM structs but can't
-		// really be split further up in Go (with the possible exception of
-		// complex numbers).
-		return nil
-	default:
-		// This should be unreachable.
-		panic("cannot split subfield: " + t.String())
-	}
-}
-
-// flattenAggregateTypeOffset returns the offsets from the start of an object of
-// type t if this object were flattened like in flattenAggregate. Used together
-// with flattenAggregate to know the start indices of each value in the
-// non-flattened object.
-//
-// Note: this is an implementation detail, use expandFormalParamOffsets instead.
-func (c *compilerContext) flattenAggregateTypeOffsets(t llvm.Type) []uint64 {
-	switch t.TypeKind() {
-	case llvm.StructTypeKind:
-		var fields []uint64
-		for fieldIndex, field := range t.StructElementTypes() {
-			if c.targetData.TypeAllocSize(field) == 0 {
-				continue
-			}
-			suboffsets := c.flattenAggregateTypeOffsets(field)
-			offset := c.targetData.ElementOffset(t, fieldIndex)
-			for i := range suboffsets {
-				suboffsets[i] += offset
-			}
-			fields = append(fields, suboffsets...)
+		fields := make([]llvm.Type, 0, t.StructElementTypesCount())
+		for _, subfield := range t.StructElementTypes() {
+			subfields := c.flattenAggregateType(subfield)
+			fields = append(fields, subfields...)
 		}
 		return fields
 	default:
-		return []uint64{0}
+		return []llvm.Type{t}
 	}
 }
 
-// flattenAggregate breaks down a struct into its elementary values for argument
-// passing. It is the value equivalent of flattenAggregateType
-func (b *builder) flattenAggregate(v llvm.Value) []llvm.Value {
+// Break down a struct into its elementary types for argument passing. The value
+// equivalent of flattenAggregateType
+func (c *Compiler) flattenAggregate(v llvm.Value) []llvm.Value {
 	switch v.Type().TypeKind() {
 	case llvm.StructTypeKind:
-		var fields []llvm.Value
-		for i, field := range v.Type().StructElementTypes() {
-			if b.targetData.TypeAllocSize(field) == 0 {
-				continue
-			}
-			subfield := b.CreateExtractValue(v, i, "")
-			subfields := b.flattenAggregate(subfield)
+		fields := make([]llvm.Value, 0, v.Type().StructElementTypesCount())
+		for i := range v.Type().StructElementTypes() {
+			subfield := c.builder.CreateExtractValue(v, i, "")
+			subfields := c.flattenAggregate(subfield)
 			fields = append(fields, subfields...)
 		}
 		return fields
@@ -276,32 +108,28 @@ func (b *builder) flattenAggregate(v llvm.Value) []llvm.Value {
 	}
 }
 
-// collapseFormalParam combines an aggregate object back into the original
-// value. This is used to join multiple LLVM parameters into a single Go value
-// in the function entry block.
-func (b *builder) collapseFormalParam(t llvm.Type, fields []llvm.Value) llvm.Value {
-	param, remaining := b.collapseFormalParamInternal(t, fields)
+// Collapse a list of fields into its original value.
+func (c *Compiler) collapseFormalParam(t llvm.Type, fields []llvm.Value) llvm.Value {
+	param, remaining := c.collapseFormalParamInternal(t, fields)
 	if len(remaining) != 0 {
 		panic("failed to expand back all fields")
 	}
 	return param
 }
 
-// collapseFormalParamInternal is an implementation detail of
-// collapseFormalParam: it works by recursing until there are no fields left.
-func (b *builder) collapseFormalParamInternal(t llvm.Type, fields []llvm.Value) (llvm.Value, []llvm.Value) {
+// Returns (value, remainingFields). Used by collapseFormalParam.
+func (c *Compiler) collapseFormalParamInternal(t llvm.Type, fields []llvm.Value) (llvm.Value, []llvm.Value) {
 	switch t.TypeKind() {
 	case llvm.StructTypeKind:
-		flattened := b.flattenAggregateType(t, "", nil)
-		if len(flattened) <= maxFieldsPerParam {
-			value := llvm.ConstNull(t)
+		if len(c.flattenAggregateType(t)) <= MaxFieldsPerParam {
+			value, err := c.getZeroValue(t)
+			if err != nil {
+				panic("could not get zero value of struct: " + err.Error())
+			}
 			for i, subtyp := range t.StructElementTypes() {
-				if b.targetData.TypeAllocSize(subtyp) == 0 {
-					continue
-				}
-				structField, remaining := b.collapseFormalParamInternal(subtyp, fields)
+				structField, remaining := c.collapseFormalParamInternal(subtyp, fields)
 				fields = remaining
-				value = b.CreateInsertValue(value, structField, i, "")
+				value = c.builder.CreateInsertValue(value, structField, i, "")
 			}
 			return value, fields
 		} else {

compiler/channel.go

@@ -1,271 +0,0 @@
-package compiler
-
-// This file lowers channel operations (make/send/recv/close) to runtime calls
-// or pseudo-operations that are lowered during goroutine lowering.
-
-import (
-	"go/types"
-
-	"github.com/tinygo-org/tinygo/compiler/llvmutil"
-	"golang.org/x/tools/go/ssa"
-	"tinygo.org/x/go-llvm"
-)
-
-func (b *builder) createMakeChan(expr *ssa.MakeChan) llvm.Value {
-	elementSize := b.targetData.TypeAllocSize(b.getLLVMType(expr.Type().Underlying().(*types.Chan).Elem()))
-	elementSizeValue := llvm.ConstInt(b.uintptrType, elementSize, false)
-	bufSize := b.getValue(expr.Size, getPos(expr))
-	b.createChanBoundsCheck(elementSize, bufSize, expr.Size.Type().Underlying().(*types.Basic), expr.Pos())
-	if bufSize.Type().IntTypeWidth() < b.uintptrType.IntTypeWidth() {
-		bufSize = b.CreateZExt(bufSize, b.uintptrType, "")
-	} else if bufSize.Type().IntTypeWidth() > b.uintptrType.IntTypeWidth() {
-		bufSize = b.CreateTrunc(bufSize, b.uintptrType, "")
-	}
-	return b.createRuntimeCall("chanMake", []llvm.Value{elementSizeValue, bufSize}, "")
-}
-
-// createChanSend emits a pseudo chan send operation. It is lowered to the
-// actual channel send operation during goroutine lowering.
-func (b *builder) createChanSend(instr *ssa.Send) {
-	ch := b.getValue(instr.Chan, getPos(instr))
-	chanValue := b.getValue(instr.X, getPos(instr))
-
-	// store value-to-send
-	valueType := b.getLLVMType(instr.X.Type())
-	isZeroSize := b.targetData.TypeAllocSize(valueType) == 0
-	var valueAlloca, valueAllocaCast, valueAllocaSize llvm.Value
-	if isZeroSize {
-		valueAlloca = llvm.ConstNull(llvm.PointerType(valueType, 0))
-		valueAllocaCast = llvm.ConstNull(b.i8ptrType)
-	} else {
-		valueAlloca, valueAllocaCast, valueAllocaSize = b.createTemporaryAlloca(valueType, "chan.value")
-		b.CreateStore(chanValue, valueAlloca)
-	}
-
-	// Allocate blockedlist buffer.
-	channelBlockedList := b.getLLVMRuntimeType("channelBlockedList")
-	channelBlockedListAlloca, channelBlockedListAllocaCast, channelBlockedListAllocaSize := b.createTemporaryAlloca(channelBlockedList, "chan.blockedList")
-
-	// Do the send.
-	b.createRuntimeCall("chanSend", []llvm.Value{ch, valueAllocaCast, channelBlockedListAlloca}, "")
-
-	// End the lifetime of the allocas.
-	// This also works around a bug in CoroSplit, at least in LLVM 8:
-	// https://bugs.llvm.org/show_bug.cgi?id=41742
-	b.emitLifetimeEnd(channelBlockedListAllocaCast, channelBlockedListAllocaSize)
-	if !isZeroSize {
-		b.emitLifetimeEnd(valueAllocaCast, valueAllocaSize)
-	}
-}
-
-// createChanRecv emits a pseudo chan receive operation. It is lowered to the
-// actual channel receive operation during goroutine lowering.
-func (b *builder) createChanRecv(unop *ssa.UnOp) llvm.Value {
-	valueType := b.getLLVMType(unop.X.Type().Underlying().(*types.Chan).Elem())
-	ch := b.getValue(unop.X, getPos(unop))
-
-	// Allocate memory to receive into.
-	isZeroSize := b.targetData.TypeAllocSize(valueType) == 0
-	var valueAlloca, valueAllocaCast, valueAllocaSize llvm.Value
-	if isZeroSize {
-		valueAlloca = llvm.ConstNull(llvm.PointerType(valueType, 0))
-		valueAllocaCast = llvm.ConstNull(b.i8ptrType)
-	} else {
-		valueAlloca, valueAllocaCast, valueAllocaSize = b.createTemporaryAlloca(valueType, "chan.value")
-	}
-
-	// Allocate blockedlist buffer.
-	channelBlockedList := b.getLLVMRuntimeType("channelBlockedList")
-	channelBlockedListAlloca, channelBlockedListAllocaCast, channelBlockedListAllocaSize := b.createTemporaryAlloca(channelBlockedList, "chan.blockedList")
-
-	// Do the receive.
-	commaOk := b.createRuntimeCall("chanRecv", []llvm.Value{ch, valueAllocaCast, channelBlockedListAlloca}, "")
-	var received llvm.Value
-	if isZeroSize {
-		received = llvm.ConstNull(valueType)
-	} else {
-		received = b.CreateLoad(valueType, valueAlloca, "chan.received")
-		b.emitLifetimeEnd(valueAllocaCast, valueAllocaSize)
-	}
-	b.emitLifetimeEnd(channelBlockedListAllocaCast, channelBlockedListAllocaSize)
-
-	if unop.CommaOk {
-		tuple := llvm.Undef(b.ctx.StructType([]llvm.Type{valueType, b.ctx.Int1Type()}, false))
-		tuple = b.CreateInsertValue(tuple, received, 0, "")
-		tuple = b.CreateInsertValue(tuple, commaOk, 1, "")
-		return tuple
-	} else {
-		return received
-	}
-}
-
-// createChanClose closes the given channel.
-func (b *builder) createChanClose(ch llvm.Value) {
-	b.createRuntimeCall("chanClose", []llvm.Value{ch}, "")
-}
-
-// createSelect emits all IR necessary for a select statements. That's a
-// non-trivial amount of code because select is very complex to implement.
-func (b *builder) createSelect(expr *ssa.Select) llvm.Value {
-	if len(expr.States) == 0 {
-		// Shortcuts for some simple selects.
-		llvmType := b.getLLVMType(expr.Type())
-		if expr.Blocking {
-			// Blocks forever:
-			//     select {}
-			b.createRuntimeCall("deadlock", nil, "")
-			return llvm.Undef(llvmType)
-		} else {
-			// No-op:
-			//     select {
-			//     default:
-			//     }
-			retval := llvm.Undef(llvmType)
-			retval = b.CreateInsertValue(retval, llvm.ConstInt(b.intType, 0xffffffffffffffff, true), 0, "")
-			return retval // {-1, false}
-		}
-	}
-
-	// This code create a (stack-allocated) slice containing all the select
-	// cases and then calls runtime.chanSelect to perform the actual select
-	// statement.
-	// Simple selects (blocking and with just one case) are already transformed
-	// into regular chan operations during SSA construction so we don't have to
-	// optimize such small selects.
-
-	// Go through all the cases. Create the selectStates slice and and
-	// determine the receive buffer size and alignment.
-	recvbufSize := uint64(0)
-	recvbufAlign := 0
-	var selectStates []llvm.Value
-	chanSelectStateType := b.getLLVMRuntimeType("chanSelectState")
-	for _, state := range expr.States {
-		ch := b.getValue(state.Chan, state.Pos)
-		selectState := llvm.ConstNull(chanSelectStateType)
-		selectState = b.CreateInsertValue(selectState, ch, 0, "")
-		switch state.Dir {
-		case types.RecvOnly:
-			// Make sure the receive buffer is big enough and has the correct alignment.
-			llvmType := b.getLLVMType(state.Chan.Type().Underlying().(*types.Chan).Elem())
-			if size := b.targetData.TypeAllocSize(llvmType); size > recvbufSize {
-				recvbufSize = size
-			}
-			if align := b.targetData.ABITypeAlignment(llvmType); align > recvbufAlign {
-				recvbufAlign = align
-			}
-		case types.SendOnly:
-			// Store this value in an alloca and put a pointer to this alloca
-			// in the send state.
-			sendValue := b.getValue(state.Send, state.Pos)
-			alloca := llvmutil.CreateEntryBlockAlloca(b.Builder, sendValue.Type(), "select.send.value")
-			b.CreateStore(sendValue, alloca)
-			ptr := b.CreateBitCast(alloca, b.i8ptrType, "")
-			selectState = b.CreateInsertValue(selectState, ptr, 1, "")
-		default:
-			panic("unreachable")
-		}
-		selectStates = append(selectStates, selectState)
-	}
-
-	// Create a receive buffer, where the received value will be stored.
-	recvbuf := llvm.Undef(b.i8ptrType)
-	if recvbufSize != 0 {
-		allocaType := llvm.ArrayType(b.ctx.Int8Type(), int(recvbufSize))
-		recvbufAlloca, _, _ := b.createTemporaryAlloca(allocaType, "select.recvbuf.alloca")
-		recvbufAlloca.SetAlignment(recvbufAlign)
-		recvbuf = b.CreateGEP(allocaType, recvbufAlloca, []llvm.Value{
-			llvm.ConstInt(b.ctx.Int32Type(), 0, false),
-			llvm.ConstInt(b.ctx.Int32Type(), 0, false),
-		}, "select.recvbuf")
-	}
-
-	// Create the states slice (allocated on the stack).
-	statesAllocaType := llvm.ArrayType(chanSelectStateType, len(selectStates))
-	statesAlloca, statesI8, statesSize := b.createTemporaryAlloca(statesAllocaType, "select.states.alloca")
-	for i, state := range selectStates {
-		// Set each slice element to the appropriate channel.
-		gep := b.CreateGEP(statesAllocaType, statesAlloca, []llvm.Value{
-			llvm.ConstInt(b.ctx.Int32Type(), 0, false),
-			llvm.ConstInt(b.ctx.Int32Type(), uint64(i), false),
-		}, "")
-		b.CreateStore(state, gep)
-	}
-	statesPtr := b.CreateGEP(statesAllocaType, statesAlloca, []llvm.Value{
-		llvm.ConstInt(b.ctx.Int32Type(), 0, false),
-		llvm.ConstInt(b.ctx.Int32Type(), 0, false),
-	}, "select.states")
-	statesLen := llvm.ConstInt(b.uintptrType, uint64(len(selectStates)), false)
-
-	// Do the select in the runtime.
-	var results llvm.Value
-	if expr.Blocking {
-		// Stack-allocate operation structures.
-		// If these were simply created as a slice, they would heap-allocate.
-		chBlockAllocaType := llvm.ArrayType(b.getLLVMRuntimeType("channelBlockedList"), len(selectStates))
-		chBlockAlloca, chBlockAllocaPtr, chBlockSize := b.createTemporaryAlloca(chBlockAllocaType, "select.block.alloca")
-		chBlockLen := llvm.ConstInt(b.uintptrType, uint64(len(selectStates)), false)
-		chBlockPtr := b.CreateGEP(chBlockAllocaType, chBlockAlloca, []llvm.Value{
-			llvm.ConstInt(b.ctx.Int32Type(), 0, false),
-			llvm.ConstInt(b.ctx.Int32Type(), 0, false),
-		}, "select.block")
-
-		results = b.createRuntimeCall("chanSelect", []llvm.Value{
-			recvbuf,
-			statesPtr, statesLen, statesLen, // []chanSelectState
-			chBlockPtr, chBlockLen, chBlockLen, // []channelBlockList
-		}, "select.result")
-
-		// Terminate the lifetime of the operation structures.
-		b.emitLifetimeEnd(chBlockAllocaPtr, chBlockSize)
-	} else {
-		results = b.createRuntimeCall("tryChanSelect", []llvm.Value{
-			recvbuf,
-			statesPtr, statesLen, statesLen, // []chanSelectState
-		}, "select.result")
-	}
-
-	// Terminate the lifetime of the states alloca.
-	b.emitLifetimeEnd(statesI8, statesSize)
-
-	// The result value does not include all the possible received values,
-	// because we can't load them in advance. Instead, the *ssa.Extract
-	// instruction will treat a *ssa.Select specially and load it there inline.
-	// Store the receive alloca in a sidetable until we hit this extract
-	// instruction.
-	if b.selectRecvBuf == nil {
-		b.selectRecvBuf = make(map[*ssa.Select]llvm.Value)
-	}
-	b.selectRecvBuf[expr] = recvbuf
-
-	return results
-}
-
-// getChanSelectResult returns the special values from a *ssa.Extract expression
-// when extracting a value from a select statement (*ssa.Select). Because
-// *ssa.Select cannot load all values in advance, it does this later in the
-// *ssa.Extract expression.
-func (b *builder) getChanSelectResult(expr *ssa.Extract) llvm.Value {
-	if expr.Index == 0 {
-		// index
-		value := b.getValue(expr.Tuple, getPos(expr))
-		index := b.CreateExtractValue(value, expr.Index, "")
-		if index.Type().IntTypeWidth() < b.intType.IntTypeWidth() {
-			index = b.CreateSExt(index, b.intType, "")
-		}
-		return index
-	} else if expr.Index == 1 {
-		// comma-ok
-		value := b.getValue(expr.Tuple, getPos(expr))
-		return b.CreateExtractValue(value, expr.Index, "")
-	} else {
-		// Select statements are (index, ok, ...) where ... is a number of
-		// received values, depending on how many receive statements there
-		// are. They are all combined into one alloca (because only one
-		// receive can proceed at a time) so we'll get that alloca, bitcast
-		// it to the correct type, and dereference it.
-		recvbuf := b.selectRecvBuf[expr.Tuple.(*ssa.Select)]
-		typ := b.getLLVMType(expr.Type())
-		ptr := b.CreateBitCast(recvbuf, llvm.PointerType(typ, 0), "")
-		return b.CreateLoad(typ, ptr, "")
-	}
-}

compiler/compiler_test.go

@@ -1,218 +0,0 @@
-package compiler
-
-import (
-	"flag"
-	"go/types"
-	"os"
-	"strconv"
-	"strings"
-	"testing"
-
-	"github.com/tinygo-org/tinygo/compileopts"
-	"github.com/tinygo-org/tinygo/goenv"
-	"github.com/tinygo-org/tinygo/loader"
-	"tinygo.org/x/go-llvm"
-)
-
-// Pass -update to go test to update the output of the test files.
-var flagUpdate = flag.Bool("update", false, "update tests based on test output")
-
-type testCase struct {
-	file      string
-	target    string
-	scheduler string
-}
-
-// Basic tests for the compiler. Build some Go files and compare the output with
-// the expected LLVM IR for regression testing.
-func TestCompiler(t *testing.T) {
-	t.Parallel()
-
-	// Determine Go minor version (e.g. 16 in go1.16.3).
-	_, goMinor, err := goenv.GetGorootVersion(goenv.Get("GOROOT"))
-	if err != nil {
-		t.Fatal("could not read Go version:", err)
-	}
-
-	// Determine which tests to run, depending on the Go and LLVM versions.
-	tests := []testCase{
-		{"basic.go", "", ""},
-		{"pointer.go", "", ""},
-		{"slice.go", "", ""},
-		{"string.go", "", ""},
-		{"float.go", "", ""},
-		{"interface.go", "", ""},
-		{"func.go", "", ""},
-		{"defer.go", "cortex-m-qemu", ""},
-		{"pragma.go", "", ""},
-		{"goroutine.go", "wasm", "asyncify"},
-		{"goroutine.go", "cortex-m-qemu", "tasks"},
-		{"channel.go", "", ""},
-		{"gc.go", "", ""},
-		{"zeromap.go", "", ""},
-	}
-	if goMinor >= 20 {
-		tests = append(tests, testCase{"go1.20.go", "", ""})
-	}
-
-	for _, tc := range tests {
-		name := tc.file
-		targetString := "wasm"
-		if tc.target != "" {
-			targetString = tc.target
-			name += "-" + tc.target
-		}
-		if tc.scheduler != "" {
-			name += "-" + tc.scheduler
-		}
-
-		t.Run(name, func(t *testing.T) {
-			options := &compileopts.Options{
-				Target: targetString,
-			}
-			target, err := compileopts.LoadTarget(options)
-			if err != nil {
-				t.Fatal("failed to load target:", err)
-			}
-			if tc.scheduler != "" {
-				options.Scheduler = tc.scheduler
-			}
-			config := &compileopts.Config{
-				Options: options,
-				Target:  target,
-			}
-			compilerConfig := &Config{
-				Triple:             config.Triple(),
-				Features:           config.Features(),
-				ABI:                config.ABI(),
-				GOOS:               config.GOOS(),
-				GOARCH:             config.GOARCH(),
-				CodeModel:          config.CodeModel(),
-				RelocationModel:    config.RelocationModel(),
-				Scheduler:          config.Scheduler(),
-				AutomaticStackSize: config.AutomaticStackSize(),
-				DefaultStackSize:   config.StackSize(),
-				NeedsStackObjects:  config.NeedsStackObjects(),
-			}
-			machine, err := NewTargetMachine(compilerConfig)
-			if err != nil {
-				t.Fatal("failed to create target machine:", err)
-			}
-			defer machine.Dispose()
-
-			// Load entire program AST into memory.
-			lprogram, err := loader.Load(config, "./testdata/"+tc.file, config.ClangHeaders, types.Config{
-				Sizes: Sizes(machine),
-			})
-			if err != nil {
-				t.Fatal("failed to create target machine:", err)
-			}
-			err = lprogram.Parse()
-			if err != nil {
-				t.Fatalf("could not parse test case %s: %s", tc.file, err)
-			}
-
-			// Compile AST to IR.
-			program := lprogram.LoadSSA()
-			pkg := lprogram.MainPkg()
-			mod, errs := CompilePackage(tc.file, pkg, program.Package(pkg.Pkg), machine, compilerConfig, false)
-			if errs != nil {
-				for _, err := range errs {
-					t.Error(err)
-				}
-				return
-			}
-
-			err = llvm.VerifyModule(mod, llvm.PrintMessageAction)
-			if err != nil {
-				t.Error(err)
-			}
-
-			// Optimize IR a little.
-			funcPasses := llvm.NewFunctionPassManagerForModule(mod)
-			defer funcPasses.Dispose()
-			funcPasses.AddInstructionCombiningPass()
-			funcPasses.InitializeFunc()
-			for fn := mod.FirstFunction(); !fn.IsNil(); fn = llvm.NextFunction(fn) {
-				funcPasses.RunFunc(fn)
-			}
-			funcPasses.FinalizeFunc()
-
-			outFilePrefix := tc.file[:len(tc.file)-3]
-			if tc.target != "" {
-				outFilePrefix += "-" + tc.target
-			}
-			if tc.scheduler != "" {
-				outFilePrefix += "-" + tc.scheduler
-			}
-			outPath := "./testdata/" + outFilePrefix + ".ll"
-
-			// Update test if needed. Do not check the result.
-			if *flagUpdate {
-				err := os.WriteFile(outPath, []byte(mod.String()), 0666)
-				if err != nil {
-					t.Error("failed to write updated output file:", err)
-				}
-				return
-			}
-
-			expected, err := os.ReadFile(outPath)
-			if err != nil {
-				t.Fatal("failed to read golden file:", err)
-			}
-
-			if !fuzzyEqualIR(mod.String(), string(expected)) {
-				t.Errorf("output does not match expected output:\n%s", mod.String())
-			}
-		})
-	}
-}
-
-// fuzzyEqualIR returns true if the two LLVM IR strings passed in are roughly
-// equal. That means, only relevant lines are compared (excluding comments
-// etc.).
-func fuzzyEqualIR(s1, s2 string) bool {
-	lines1 := filterIrrelevantIRLines(strings.Split(s1, "\n"))
-	lines2 := filterIrrelevantIRLines(strings.Split(s2, "\n"))
-	if len(lines1) != len(lines2) {
-		return false
-	}
-	for i, line1 := range lines1 {
-		line2 := lines2[i]
-		if line1 != line2 {
-			return false
-		}
-	}
-
-	return true
-}
-
-// filterIrrelevantIRLines removes lines from the input slice of strings that
-// are not relevant in comparing IR. For example, empty lines and comments are
-// stripped out.
-func filterIrrelevantIRLines(lines []string) []string {
-	var out []string
-	llvmVersion, err := strconv.Atoi(strings.Split(llvm.Version, ".")[0])
-	if err != nil {
-		// Note: this should never happen and if it does, it will always happen
-		// for a particular build because llvm.Version is a constant.
-		panic(err)
-	}
-	for _, line := range lines {
-		line = strings.Split(line, ";")[0]    // strip out comments/info
-		line = strings.TrimRight(line, "\r ") // drop '\r' on Windows and remove trailing spaces from comments
-		if line == "" {
-			continue
-		}
-		if strings.HasPrefix(line, "source_filename = ") {
-			continue
-		}
-		if llvmVersion < 14 && strings.HasPrefix(line, "target datalayout = ") {
-			// The datalayout string may vary betewen LLVM versions.
-			// Right now test outputs are for LLVM 14 and higher.
-			continue
-		}
-		out = append(out, line)
-	}
-	return out
-}

compiler/defer.go

@@ -14,283 +14,82 @@ package compiler
 //     frames.
 
 import (
-	"go/types"
-	"strconv"
-
-	"github.com/tinygo-org/tinygo/compiler/llvmutil"
+	"github.com/aykevl/go-llvm"
+	"github.com/aykevl/tinygo/ir"
 	"golang.org/x/tools/go/ssa"
-	"tinygo.org/x/go-llvm"
 )
 
-// supportsRecover returns whether the compiler supports the recover() builtin
-// for the current architecture.
-func (b *builder) supportsRecover() bool {
-	switch b.archFamily() {
-	case "wasm32":
-		// Probably needs to be implemented using the exception handling
-		// proposal of WebAssembly:
-		// https://github.com/WebAssembly/exception-handling
-		return false
-	case "riscv64", "xtensa":
-		// TODO: add support for these architectures
-		return false
-	default:
-		return true
-	}
-}
-
-// hasDeferFrame returns whether the current function needs to catch panics and
-// run defers.
-func (b *builder) hasDeferFrame() bool {
-	if b.fn.Recover == nil {
-		return false
-	}
-	return b.supportsRecover()
-}
-
 // deferInitFunc sets up this function for future deferred calls. It must be
 // called from within the entry block when this function contains deferred
 // calls.
-func (b *builder) deferInitFunc() {
+func (c *Compiler) deferInitFunc(frame *Frame) {
 	// Some setup.
-	b.deferFuncs = make(map[*ssa.Function]int)
-	b.deferInvokeFuncs = make(map[string]int)
-	b.deferClosureFuncs = make(map[*ssa.Function]int)
-	b.deferExprFuncs = make(map[ssa.Value]int)
-	b.deferBuiltinFuncs = make(map[ssa.Value]deferBuiltin)
+	frame.deferFuncs = make(map[*ir.Function]int)
+	frame.deferInvokeFuncs = make(map[string]int)
+	frame.deferClosureFuncs = make(map[*ir.Function]int)
 
 	// Create defer list pointer.
-	deferType := llvm.PointerType(b.getLLVMRuntimeType("_defer"), 0)
-	b.deferPtr = b.CreateAlloca(deferType, "deferPtr")
-	b.CreateStore(llvm.ConstPointerNull(deferType), b.deferPtr)
-
-	if b.hasDeferFrame() {
-		// Set up the defer frame with the current stack pointer.
-		// This assumes that the stack pointer doesn't move outside of the
-		// function prologue/epilogue (an invariant maintained by TinyGo but
-		// possibly broken by the C alloca function).
-		// The frame pointer is _not_ saved, because it is marked as clobbered
-		// in the setjmp-like inline assembly.
-		deferFrameType := b.getLLVMRuntimeType("deferFrame")
-		b.deferFrame = b.CreateAlloca(deferFrameType, "deferframe.buf")
-		stackPointer := b.readStackPointer()
-		b.createRuntimeCall("setupDeferFrame", []llvm.Value{b.deferFrame, stackPointer}, "")
-
-		// Create the landing pad block, which is where control transfers after
-		// a panic.
-		b.landingpad = b.ctx.AddBasicBlock(b.llvmFn, "lpad")
-	}
+	deferType := llvm.PointerType(c.mod.GetTypeByName("runtime._defer"), 0)
+	frame.deferPtr = c.builder.CreateAlloca(deferType, "deferPtr")
+	c.builder.CreateStore(llvm.ConstPointerNull(deferType), frame.deferPtr)
 }
 
-// createLandingPad fills in the landing pad block. This block runs the deferred
-// functions and returns (by jumping to the recover block). If the function is
-// still panicking after the defers are run, the panic will be re-raised in
-// destroyDeferFrame.
-func (b *builder) createLandingPad() {
-	b.SetInsertPointAtEnd(b.landingpad)
-
-	// Add debug info, if needed.
-	// The location used is the closing bracket of the function.
-	if b.Debug {
-		pos := b.program.Fset.Position(b.fn.Syntax().End())
-		b.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), b.difunc, llvm.Metadata{})
-	}
-
-	b.createRunDefers()
-
-	// Continue at the 'recover' block, which returns to the parent in an
-	// appropriate way.
-	b.CreateBr(b.blockEntries[b.fn.Recover])
-}
-
-// createInvokeCheckpoint saves the function state at the given point, to
-// continue at the landing pad if a panic happened. This is implemented using a
-// setjmp-like construct.
-func (b *builder) createInvokeCheckpoint() {
-	// Construct inline assembly equivalents of setjmp.
-	// The assembly works as follows:
-	//   * All registers (both callee-saved and caller saved) are clobbered
-	//     after the inline assembly returns.
-	//   * The assembly stores the address just past the end of the assembly
-	//     into the jump buffer.
-	//   * The return value (eax, rax, r0, etc) is set to zero in the inline
-	//     assembly but set to an unspecified non-zero value when jumping using
-	//     a longjmp.
-	var asmString, constraints string
-	resultType := b.uintptrType
-	switch b.archFamily() {
-	case "i386":
-		asmString = `
-xorl %eax, %eax
-movl $$1f, 4(%ebx)
-1:`
-		constraints = "={eax},{ebx},~{ebx},~{ecx},~{edx},~{esi},~{edi},~{ebp},~{xmm0},~{xmm1},~{xmm2},~{xmm3},~{xmm4},~{xmm5},~{xmm6},~{xmm7},~{fpsr},~{fpcr},~{flags},~{dirflag},~{memory}"
-		// This doesn't include the floating point stack because TinyGo uses
-		// newer floating point instructions.
-	case "x86_64":
-		asmString = `
-leaq 1f(%rip), %rax
-movq %rax, 8(%rbx)
-xorq %rax, %rax
-1:`
-		constraints = "={rax},{rbx},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{xmm0},~{xmm1},~{xmm2},~{xmm3},~{xmm4},~{xmm5},~{xmm6},~{xmm7},~{xmm8},~{xmm9},~{xmm10},~{xmm11},~{xmm12},~{xmm13},~{xmm14},~{xmm15},~{xmm16},~{xmm17},~{xmm18},~{xmm19},~{xmm20},~{xmm21},~{xmm22},~{xmm23},~{xmm24},~{xmm25},~{xmm26},~{xmm27},~{xmm28},~{xmm29},~{xmm30},~{xmm31},~{fpsr},~{fpcr},~{flags},~{dirflag},~{memory}"
-		// This list doesn't include AVX/AVX512 registers because TinyGo
-		// doesn't currently enable support for AVX instructions.
-	case "arm":
-		// Note: the following assembly takes into account that the PC is
-		// always 4 bytes ahead on ARM. The PC that is stored always points
-		// to the instruction just after the assembly fragment so that
-		// tinygo_longjmp lands at the correct instruction.
-		if b.isThumb() {
-			// Instructions are 2 bytes in size.
-			asmString = `
-movs r0, #0
-mov r2, pc
-str r2, [r1, #4]`
-		} else {
-			// Instructions are 4 bytes in size.
-			asmString = `
-str pc, [r1, #4]
-movs r0, #0`
-		}
-		constraints = "={r0},{r1},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{lr},~{q0},~{q1},~{q2},~{q3},~{q4},~{q5},~{q6},~{q7},~{q8},~{q9},~{q10},~{q11},~{q12},~{q13},~{q14},~{q15},~{cpsr},~{memory}"
-	case "aarch64":
-		asmString = `
-adr x2, 1f
-str x2, [x1, #8]
-mov x0, #0
-1:
-`
-		constraints = "={x0},{x1},~{x1},~{x2},~{x3},~{x4},~{x5},~{x6},~{x7},~{x8},~{x9},~{x10},~{x11},~{x12},~{x13},~{x14},~{x15},~{x16},~{x17},~{x19},~{x20},~{x21},~{x22},~{x23},~{x24},~{x25},~{x26},~{x27},~{x28},~{lr},~{q0},~{q1},~{q2},~{q3},~{q4},~{q5},~{q6},~{q7},~{q8},~{q9},~{q10},~{q11},~{q12},~{q13},~{q14},~{q15},~{q16},~{q17},~{q18},~{q19},~{q20},~{q21},~{q22},~{q23},~{q24},~{q25},~{q26},~{q27},~{q28},~{q29},~{q30},~{nzcv},~{ffr},~{vg},~{memory}"
-		if b.GOOS != "darwin" && b.GOOS != "windows" {
-			// These registers cause the following warning when compiling for
-			// MacOS and Windows:
-			//     warning: inline asm clobber list contains reserved registers:
-			//     X18, FP
-			//     Reserved registers on the clobber list may not be preserved
-			//     across the asm statement, and clobbering them may lead to
-			//     undefined behaviour.
-			constraints += ",~{x18},~{fp}"
-		}
-		// TODO: SVE registers, which we don't use in TinyGo at the moment.
-	case "avr":
-		// Note: the Y register (R28:R29) is a fixed register and therefore
-		// needs to be saved manually. TODO: do this only once per function with
-		// a defer frame, not for every call.
-		resultType = b.ctx.Int8Type()
-		asmString = `
-ldi r24, pm_lo8(1f)
-ldi r25, pm_hi8(1f)
-std z+2, r24
-std z+3, r25
-std z+4, r28
-std z+5, r29
-ldi r24, 0
-1:`
-		constraints = "={r24},z,~{r0},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{r16},~{r17},~{r18},~{r19},~{r20},~{r21},~{r22},~{r23},~{r25},~{r26},~{r27}"
-	case "riscv32":
-		asmString = `
-la a2, 1f
-sw a2, 4(a1)
-li a0, 0
-1:`
-		constraints = "={a0},{a1},~{a1},~{a2},~{a3},~{a4},~{a5},~{a6},~{a7},~{s0},~{s1},~{s2},~{s3},~{s4},~{s5},~{s6},~{s7},~{s8},~{s9},~{s10},~{s11},~{t0},~{t1},~{t2},~{t3},~{t4},~{t5},~{t6},~{ra},~{f0},~{f1},~{f2},~{f3},~{f4},~{f5},~{f6},~{f7},~{f8},~{f9},~{f10},~{f11},~{f12},~{f13},~{f14},~{f15},~{f16},~{f17},~{f18},~{f19},~{f20},~{f21},~{f22},~{f23},~{f24},~{f25},~{f26},~{f27},~{f28},~{f29},~{f30},~{f31},~{memory}"
-	default:
-		// This case should have been handled by b.supportsRecover().
-		b.addError(b.fn.Pos(), "unknown architecture for defer: "+b.archFamily())
-	}
-	asmType := llvm.FunctionType(resultType, []llvm.Type{b.deferFrame.Type()}, false)
-	asm := llvm.InlineAsm(asmType, asmString, constraints, false, false, 0, false)
-	result := b.CreateCall(asmType, asm, []llvm.Value{b.deferFrame}, "setjmp")
-	result.AddCallSiteAttribute(-1, b.ctx.CreateEnumAttribute(llvm.AttributeKindID("returns_twice"), 0))
-	isZero := b.CreateICmp(llvm.IntEQ, result, llvm.ConstInt(resultType, 0, false), "setjmp.result")
-	continueBB := b.insertBasicBlock("")
-	b.CreateCondBr(isZero, continueBB, b.landingpad)
-	b.SetInsertPointAtEnd(continueBB)
-	b.blockExits[b.currentBlock] = continueBB
-}
-
-// isInLoop checks if there is a path from a basic block to itself.
-func isInLoop(start *ssa.BasicBlock) bool {
-	// Use a breadth-first search to scan backwards through the block graph.
-	queue := []*ssa.BasicBlock{start}
-	checked := map[*ssa.BasicBlock]struct{}{}
-
-	for len(queue) > 0 {
-		// pop a block off of the queue
-		block := queue[len(queue)-1]
-		queue = queue[:len(queue)-1]
-
-		// Search through predecessors.
-		// Searching backwards means that this is pretty fast when the block is close to the start of the function.
-		// Defers are often placed near the start of the function.
-		for _, pred := range block.Preds {
-			if pred == start {
-				// cycle found
-				return true
-			}
-
-			if _, ok := checked[pred]; ok {
-				// block already checked
-				continue
-			}
-
-			// add to queue and checked map
-			queue = append(queue, pred)
-			checked[pred] = struct{}{}
-		}
-	}
-
-	return false
-}
-
-// createDefer emits a single defer instruction, to be run when this function
+// emitDefer emits a single defer instruction, to be run when this function
 // returns.
-func (b *builder) createDefer(instr *ssa.Defer) {
+func (c *Compiler) emitDefer(frame *Frame, instr *ssa.Defer) error {
 	// The pointer to the previous defer struct, which we will replace to
 	// make a linked list.
-	deferType := llvm.PointerType(b.getLLVMRuntimeType("_defer"), 0)
-	next := b.CreateLoad(deferType, b.deferPtr, "defer.next")
+	next := c.builder.CreateLoad(frame.deferPtr, "defer.next")
 
 	var values []llvm.Value
-	valueTypes := []llvm.Type{b.uintptrType, next.Type()}
+	valueTypes := []llvm.Type{c.uintptrType, next.Type()}
 	if instr.Call.IsInvoke() {
 		// Method call on an interface.
 
 		// Get callback type number.
 		methodName := instr.Call.Method.FullName()
-		if _, ok := b.deferInvokeFuncs[methodName]; !ok {
-			b.deferInvokeFuncs[methodName] = len(b.allDeferFuncs)
-			b.allDeferFuncs = append(b.allDeferFuncs, &instr.Call)
+		if _, ok := frame.deferInvokeFuncs[methodName]; !ok {
+			frame.deferInvokeFuncs[methodName] = len(frame.allDeferFuncs)
+			frame.allDeferFuncs = append(frame.allDeferFuncs, &instr.Call)
 		}
-		callback := llvm.ConstInt(b.uintptrType, uint64(b.deferInvokeFuncs[methodName]), false)
+		callback := llvm.ConstInt(c.uintptrType, uint64(frame.deferInvokeFuncs[methodName]), false)
 
 		// Collect all values to be put in the struct (starting with
 		// runtime._defer fields, followed by the call parameters).
-		itf := b.getValue(instr.Call.Value, getPos(instr)) // interface
-		typecode := b.CreateExtractValue(itf, 0, "invoke.func.typecode")
-		receiverValue := b.CreateExtractValue(itf, 1, "invoke.func.receiver")
-		values = []llvm.Value{callback, next, typecode, receiverValue}
-		valueTypes = append(valueTypes, b.i8ptrType, b.i8ptrType)
+		itf, err := c.parseExpr(frame, instr.Call.Value) // interface
+		if err != nil {
+			return err
+		}
+		receiverValue := c.builder.CreateExtractValue(itf, 1, "invoke.func.receiver")
+		values = []llvm.Value{callback, next, receiverValue}
+		valueTypes = append(valueTypes, c.i8ptrType)
 		for _, arg := range instr.Call.Args {
-			val := b.getValue(arg, getPos(instr))
+			val, err := c.parseExpr(frame, arg)
+			if err != nil {
+				return err
+			}
 			values = append(values, val)
 			valueTypes = append(valueTypes, val.Type())
 		}
 
 	} else if callee, ok := instr.Call.Value.(*ssa.Function); ok {
 		// Regular function call.
-		if _, ok := b.deferFuncs[callee]; !ok {
-			b.deferFuncs[callee] = len(b.allDeferFuncs)
-			b.allDeferFuncs = append(b.allDeferFuncs, callee)
+		fn := c.ir.GetFunction(callee)
+
+		if _, ok := frame.deferFuncs[fn]; !ok {
+			frame.deferFuncs[fn] = len(frame.allDeferFuncs)
+			frame.allDeferFuncs = append(frame.allDeferFuncs, fn)
 		}
-		callback := llvm.ConstInt(b.uintptrType, uint64(b.deferFuncs[callee]), false)
+		callback := llvm.ConstInt(c.uintptrType, uint64(frame.deferFuncs[fn]), false)
 
 		// Collect all values to be put in the struct (starting with
 		// runtime._defer fields).
 		values = []llvm.Value{callback, next}
 		for _, param := range instr.Call.Args {
-			llvmParam := b.getValue(param, getPos(instr))
+			llvmParam, err := c.parseExpr(frame, param)
+			if err != nil {
+				return err
+			}
 			values = append(values, llvmParam)
 			valueTypes = append(valueTypes, llvmParam.Type())
 		}
@@ -302,114 +101,61 @@ func (b *builder) createDefer(instr *ssa.Defer) {
 		// pointer.
 		// TODO: ignore this closure entirely and put pointers to the free
 		// variables directly in the defer struct, avoiding a memory allocation.
-		closure := b.getValue(instr.Call.Value, getPos(instr))
-		context := b.CreateExtractValue(closure, 0, "")
+		closure, err := c.parseExpr(frame, instr.Call.Value)
+		if err != nil {
+			return err
+		}
+		context := c.builder.CreateExtractValue(closure, 0, "")
 
 		// Get the callback number.
-		fn := makeClosure.Fn.(*ssa.Function)
-		if _, ok := b.deferClosureFuncs[fn]; !ok {
-			b.deferClosureFuncs[fn] = len(b.allDeferFuncs)
-			b.allDeferFuncs = append(b.allDeferFuncs, makeClosure)
+		fn := c.ir.GetFunction(makeClosure.Fn.(*ssa.Function))
+		if _, ok := frame.deferClosureFuncs[fn]; !ok {
+			frame.deferClosureFuncs[fn] = len(frame.allDeferFuncs)
+			frame.allDeferFuncs = append(frame.allDeferFuncs, makeClosure)
 		}
-		callback := llvm.ConstInt(b.uintptrType, uint64(b.deferClosureFuncs[fn]), false)
+		callback := llvm.ConstInt(c.uintptrType, uint64(frame.deferClosureFuncs[fn]), false)
 
 		// Collect all values to be put in the struct (starting with
 		// runtime._defer fields, followed by all parameters including the
 		// context pointer).
 		values = []llvm.Value{callback, next}
 		for _, param := range instr.Call.Args {
-			llvmParam := b.getValue(param, getPos(instr))
+			llvmParam, err := c.parseExpr(frame, param)
+			if err != nil {
+				return err
+			}
 			values = append(values, llvmParam)
 			valueTypes = append(valueTypes, llvmParam.Type())
 		}
 		values = append(values, context)
 		valueTypes = append(valueTypes, context.Type())
 
-	} else if builtin, ok := instr.Call.Value.(*ssa.Builtin); ok {
-		var argTypes []types.Type
-		var argValues []llvm.Value
-		for _, arg := range instr.Call.Args {
-			argTypes = append(argTypes, arg.Type())
-			argValues = append(argValues, b.getValue(arg, getPos(instr)))
-		}
-
-		if _, ok := b.deferBuiltinFuncs[instr.Call.Value]; !ok {
-			b.deferBuiltinFuncs[instr.Call.Value] = deferBuiltin{
-				callName: builtin.Name(),
-				pos:      builtin.Pos(),
-				argTypes: argTypes,
-				callback: len(b.allDeferFuncs),
-			}
-			b.allDeferFuncs = append(b.allDeferFuncs, instr.Call.Value)
-		}
-		callback := llvm.ConstInt(b.uintptrType, uint64(b.deferBuiltinFuncs[instr.Call.Value].callback), false)
-
-		// Collect all values to be put in the struct (starting with
-		// runtime._defer fields).
-		values = []llvm.Value{callback, next}
-		for _, param := range argValues {
-			values = append(values, param)
-			valueTypes = append(valueTypes, param.Type())
-		}
-
 	} else {
-		funcValue := b.getValue(instr.Call.Value, getPos(instr))
-
-		if _, ok := b.deferExprFuncs[instr.Call.Value]; !ok {
-			b.deferExprFuncs[instr.Call.Value] = len(b.allDeferFuncs)
-			b.allDeferFuncs = append(b.allDeferFuncs, &instr.Call)
-		}
-
-		callback := llvm.ConstInt(b.uintptrType, uint64(b.deferExprFuncs[instr.Call.Value]), false)
-
-		// Collect all values to be put in the struct (starting with
-		// runtime._defer fields, followed by all parameters including the
-		// context pointer).
-		values = []llvm.Value{callback, next, funcValue}
-		valueTypes = append(valueTypes, funcValue.Type())
-		for _, param := range instr.Call.Args {
-			llvmParam := b.getValue(param, getPos(instr))
-			values = append(values, llvmParam)
-			valueTypes = append(valueTypes, llvmParam.Type())
-		}
+		return c.makeError(instr.Pos(), "todo: defer on uncommon function call type")
 	}
 
-	// Make a struct out of the collected values to put in the deferred call
-	// struct.
-	deferredCallType := b.ctx.StructType(valueTypes, false)
-	deferredCall := llvm.ConstNull(deferredCallType)
+	// Make a struct out of the collected values to put in the defer frame.
+	deferFrameType := c.ctx.StructType(valueTypes, false)
+	deferFrame, err := c.getZeroValue(deferFrameType)
+	if err != nil {
+		return err
+	}
 	for i, value := range values {
-		deferredCall = b.CreateInsertValue(deferredCall, value, i, "")
+		deferFrame = c.builder.CreateInsertValue(deferFrame, value, i, "")
 	}
 
-	// Put this struct in an allocation.
-	var alloca llvm.Value
-	if !isInLoop(instr.Block()) {
-		// This can safely use a stack allocation.
-		alloca = llvmutil.CreateEntryBlockAlloca(b.Builder, deferredCallType, "defer.alloca")
-	} else {
-		// This may be hit a variable number of times, so use a heap allocation.
-		size := b.targetData.TypeAllocSize(deferredCallType)
-		sizeValue := llvm.ConstInt(b.uintptrType, size, false)
-		nilPtr := llvm.ConstNull(b.i8ptrType)
-		allocCall := b.createRuntimeCall("alloc", []llvm.Value{sizeValue, nilPtr}, "defer.alloc.call")
-		alloca = b.CreateBitCast(allocCall, llvm.PointerType(deferredCallType, 0), "defer.alloc")
-	}
-	if b.NeedsStackObjects {
-		b.trackPointer(alloca)
-	}
-	b.CreateStore(deferredCall, alloca)
+	// Put this struct in an alloca.
+	alloca := c.builder.CreateAlloca(deferFrameType, "defer.alloca")
+	c.builder.CreateStore(deferFrame, alloca)
 
 	// Push it on top of the linked list by replacing deferPtr.
-	allocaCast := b.CreateBitCast(alloca, next.Type(), "defer.alloca.cast")
-	b.CreateStore(allocaCast, b.deferPtr)
+	allocaCast := c.builder.CreateBitCast(alloca, next.Type(), "defer.alloca.cast")
+	c.builder.CreateStore(allocaCast, frame.deferPtr)
+	return nil
 }
 
-// createRunDefers emits code to run all deferred functions.
-func (b *builder) createRunDefers() {
-	deferType := b.getLLVMRuntimeType("_defer")
-	deferPtrType := llvm.PointerType(deferType, 0)
-
+// emitRunDefers emits code to run all deferred functions.
+func (c *Compiler) emitRunDefers(frame *Frame) error {
 	// Add a loop like the following:
 	//     for stack != nil {
 	//         _stack := stack
@@ -425,204 +171,159 @@ func (b *builder) createRunDefers() {
 	//         }
 	//     }
 
-	// Create loop, in the order: loophead, loop, callback0, callback1, ..., unreachable, end.
-	end := b.insertBasicBlock("rundefers.end")
-	unreachable := b.ctx.InsertBasicBlock(end, "rundefers.default")
-	loop := b.ctx.InsertBasicBlock(unreachable, "rundefers.loop")
-	loophead := b.ctx.InsertBasicBlock(loop, "rundefers.loophead")
-	b.CreateBr(loophead)
+	// Create loop.
+	loophead := llvm.AddBasicBlock(frame.fn.LLVMFn, "rundefers.loophead")
+	loop := llvm.AddBasicBlock(frame.fn.LLVMFn, "rundefers.loop")
+	unreachable := llvm.AddBasicBlock(frame.fn.LLVMFn, "rundefers.default")
+	end := llvm.AddBasicBlock(frame.fn.LLVMFn, "rundefers.end")
+	c.builder.CreateBr(loophead)
 
 	// Create loop head:
 	//     for stack != nil {
-	b.SetInsertPointAtEnd(loophead)
-	deferData := b.CreateLoad(deferPtrType, b.deferPtr, "")
-	stackIsNil := b.CreateICmp(llvm.IntEQ, deferData, llvm.ConstPointerNull(deferData.Type()), "stackIsNil")
-	b.CreateCondBr(stackIsNil, end, loop)
+	c.builder.SetInsertPointAtEnd(loophead)
+	deferData := c.builder.CreateLoad(frame.deferPtr, "")
+	stackIsNil := c.builder.CreateICmp(llvm.IntEQ, deferData, llvm.ConstPointerNull(deferData.Type()), "stackIsNil")
+	c.builder.CreateCondBr(stackIsNil, end, loop)
 
 	// Create loop body:
 	//     _stack := stack
 	//     stack = stack.next
 	//     switch stack.callback {
-	b.SetInsertPointAtEnd(loop)
-	nextStackGEP := b.CreateInBoundsGEP(deferType, deferData, []llvm.Value{
-		llvm.ConstInt(b.ctx.Int32Type(), 0, false),
-		llvm.ConstInt(b.ctx.Int32Type(), 1, false), // .next field
+	c.builder.SetInsertPointAtEnd(loop)
+	nextStackGEP := c.builder.CreateGEP(deferData, []llvm.Value{
+		llvm.ConstInt(c.ctx.Int32Type(), 0, false),
+		llvm.ConstInt(c.ctx.Int32Type(), 1, false), // .next field
 	}, "stack.next.gep")
-	nextStack := b.CreateLoad(deferPtrType, nextStackGEP, "stack.next")
-	b.CreateStore(nextStack, b.deferPtr)
-	gep := b.CreateInBoundsGEP(deferType, deferData, []llvm.Value{
-		llvm.ConstInt(b.ctx.Int32Type(), 0, false),
-		llvm.ConstInt(b.ctx.Int32Type(), 0, false), // .callback field
+	nextStack := c.builder.CreateLoad(nextStackGEP, "stack.next")
+	c.builder.CreateStore(nextStack, frame.deferPtr)
+	gep := c.builder.CreateGEP(deferData, []llvm.Value{
+		llvm.ConstInt(c.ctx.Int32Type(), 0, false),
+		llvm.ConstInt(c.ctx.Int32Type(), 0, false), // .callback field
 	}, "callback.gep")
-	callback := b.CreateLoad(b.uintptrType, gep, "callback")
-	sw := b.CreateSwitch(callback, unreachable, len(b.allDeferFuncs))
+	callback := c.builder.CreateLoad(gep, "callback")
+	sw := c.builder.CreateSwitch(callback, unreachable, len(frame.allDeferFuncs))
 
-	for i, callback := range b.allDeferFuncs {
+	for i, callback := range frame.allDeferFuncs {
 		// Create switch case, for example:
 		//     case 0:
 		//         // run first deferred call
-		block := b.insertBasicBlock("rundefers.callback" + strconv.Itoa(i))
-		sw.AddCase(llvm.ConstInt(b.uintptrType, uint64(i), false), block)
-		b.SetInsertPointAtEnd(block)
+		block := llvm.AddBasicBlock(frame.fn.LLVMFn, "rundefers.callback")
+		sw.AddCase(llvm.ConstInt(c.uintptrType, uint64(i), false), block)
+		c.builder.SetInsertPointAtEnd(block)
 		switch callback := callback.(type) {
 		case *ssa.CallCommon:
-			// Call on an value or interface value.
+			// Call on an interface value.
+			if !callback.IsInvoke() {
+				panic("expected an invoke call, not a direct call")
+			}
 
 			// Get the real defer struct type and cast to it.
-			valueTypes := []llvm.Type{b.uintptrType, llvm.PointerType(b.getLLVMRuntimeType("_defer"), 0)}
-
-			if !callback.IsInvoke() {
-				//Expect funcValue to be passed through the deferred call.
-				valueTypes = append(valueTypes, b.getFuncType(callback.Signature()))
-			} else {
-				//Expect typecode
-				valueTypes = append(valueTypes, b.i8ptrType, b.i8ptrType)
-			}
-
+			valueTypes := []llvm.Type{c.uintptrType, llvm.PointerType(c.mod.GetTypeByName("runtime._defer"), 0), c.i8ptrType}
 			for _, arg := range callback.Args {
-				valueTypes = append(valueTypes, b.getLLVMType(arg.Type()))
+				llvmType, err := c.getLLVMType(arg.Type())
+				if err != nil {
+					return err
+				}
+				valueTypes = append(valueTypes, llvmType)
 			}
-
-			deferredCallType := b.ctx.StructType(valueTypes, false)
-			deferredCallPtr := b.CreateBitCast(deferData, llvm.PointerType(deferredCallType, 0), "defercall")
+			deferFrameType := c.ctx.StructType(valueTypes, false)
+			deferFramePtr := c.builder.CreateBitCast(deferData, llvm.PointerType(deferFrameType, 0), "deferFrame")
 
 			// Extract the params from the struct (including receiver).
 			forwardParams := []llvm.Value{}
-			zero := llvm.ConstInt(b.ctx.Int32Type(), 0, false)
+			zero := llvm.ConstInt(c.ctx.Int32Type(), 0, false)
 			for i := 2; i < len(valueTypes); i++ {
-				gep := b.CreateInBoundsGEP(deferredCallType, deferredCallPtr, []llvm.Value{zero, llvm.ConstInt(b.ctx.Int32Type(), uint64(i), false)}, "gep")
-				forwardParam := b.CreateLoad(valueTypes[i], gep, "param")
+				gep := c.builder.CreateGEP(deferFramePtr, []llvm.Value{zero, llvm.ConstInt(c.ctx.Int32Type(), uint64(i), false)}, "gep")
+				forwardParam := c.builder.CreateLoad(gep, "param")
 				forwardParams = append(forwardParams, forwardParam)
 			}
 
-			var fnPtr llvm.Value
-			var fnType llvm.Type
+			// Add the context parameter. An interface call cannot also be a
+			// closure but we have to supply the parameter anyway for platforms
+			// with a strict calling convention.
+			forwardParams = append(forwardParams, llvm.Undef(c.i8ptrType))
 
-			if !callback.IsInvoke() {
-				// Isolate the func value.
-				funcValue := forwardParams[0]
-				forwardParams = forwardParams[1:]
-
-				//Get function pointer and context
-				var context llvm.Value
-				fnType, fnPtr, context = b.decodeFuncValue(funcValue, callback.Signature())
-
-				//Pass context
-				forwardParams = append(forwardParams, context)
-			} else {
-				// Move typecode from the start to the end of the list of
-				// parameters.
-				forwardParams = append(forwardParams[1:], forwardParams[0])
-				fnPtr = b.getInvokeFunction(callback)
-				fnType = fnPtr.GlobalValueType()
-
-				// Add the context parameter. An interface call cannot also be a
-				// closure but we have to supply the parameter anyway for platforms
-				// with a strict calling convention.
-				forwardParams = append(forwardParams, llvm.Undef(b.i8ptrType))
+			fnPtr, _, err := c.getInvokeCall(frame, callback)
+			if err != nil {
+				return err
 			}
+			c.createCall(fnPtr, forwardParams, "")
 
-			b.createCall(fnType, fnPtr, forwardParams, "")
-
-		case *ssa.Function:
+		case *ir.Function:
 			// Direct call.
 
 			// Get the real defer struct type and cast to it.
-			valueTypes := []llvm.Type{b.uintptrType, llvm.PointerType(b.getLLVMRuntimeType("_defer"), 0)}
-			for _, param := range getParams(callback.Signature) {
-				valueTypes = append(valueTypes, b.getLLVMType(param.Type()))
+			valueTypes := []llvm.Type{c.uintptrType, llvm.PointerType(c.mod.GetTypeByName("runtime._defer"), 0)}
+			for _, param := range callback.Params {
+				llvmType, err := c.getLLVMType(param.Type())
+				if err != nil {
+					return err
+				}
+				valueTypes = append(valueTypes, llvmType)
 			}
-			deferredCallType := b.ctx.StructType(valueTypes, false)
-			deferredCallPtr := b.CreateBitCast(deferData, llvm.PointerType(deferredCallType, 0), "defercall")
+			deferFrameType := c.ctx.StructType(valueTypes, false)
+			deferFramePtr := c.builder.CreateBitCast(deferData, llvm.PointerType(deferFrameType, 0), "deferFrame")
 
 			// Extract the params from the struct.
 			forwardParams := []llvm.Value{}
-			zero := llvm.ConstInt(b.ctx.Int32Type(), 0, false)
-			for i := range getParams(callback.Signature) {
-				gep := b.CreateInBoundsGEP(deferredCallType, deferredCallPtr, []llvm.Value{zero, llvm.ConstInt(b.ctx.Int32Type(), uint64(i+2), false)}, "gep")
-				forwardParam := b.CreateLoad(valueTypes[i+2], gep, "param")
+			zero := llvm.ConstInt(c.ctx.Int32Type(), 0, false)
+			for i := range callback.Params {
+				gep := c.builder.CreateGEP(deferFramePtr, []llvm.Value{zero, llvm.ConstInt(c.ctx.Int32Type(), uint64(i+2), false)}, "gep")
+				forwardParam := c.builder.CreateLoad(gep, "param")
 				forwardParams = append(forwardParams, forwardParam)
 			}
 
-			// Plain TinyGo functions add some extra parameters to implement async functionality and function receivers.
-			// These parameters should not be supplied when calling into an external C/ASM function.
-			if !b.getFunctionInfo(callback).exported {
-				// Add the context parameter. We know it is ignored by the receiving
-				// function, but we have to pass one anyway.
-				forwardParams = append(forwardParams, llvm.Undef(b.i8ptrType))
-			}
+			// Add the context parameter. We know it is ignored by the receiving
+			// function, but we have to pass one anyway.
+			forwardParams = append(forwardParams, llvm.Undef(c.i8ptrType))
 
 			// Call real function.
-			fnType, fn := b.getFunction(callback)
-			b.createInvoke(fnType, fn, forwardParams, "")
+			c.createCall(callback.LLVMFn, forwardParams, "")
 
 		case *ssa.MakeClosure:
 			// Get the real defer struct type and cast to it.
-			fn := callback.Fn.(*ssa.Function)
-			valueTypes := []llvm.Type{b.uintptrType, llvm.PointerType(b.getLLVMRuntimeType("_defer"), 0)}
+			fn := c.ir.GetFunction(callback.Fn.(*ssa.Function))
+			valueTypes := []llvm.Type{c.uintptrType, llvm.PointerType(c.mod.GetTypeByName("runtime._defer"), 0)}
 			params := fn.Signature.Params()
 			for i := 0; i < params.Len(); i++ {
-				valueTypes = append(valueTypes, b.getLLVMType(params.At(i).Type()))
+				llvmType, err := c.getLLVMType(params.At(i).Type())
+				if err != nil {
+					return err
+				}
+				valueTypes = append(valueTypes, llvmType)
 			}
-			valueTypes = append(valueTypes, b.i8ptrType) // closure
-			deferredCallType := b.ctx.StructType(valueTypes, false)
-			deferredCallPtr := b.CreateBitCast(deferData, llvm.PointerType(deferredCallType, 0), "defercall")
+			valueTypes = append(valueTypes, c.i8ptrType) // closure
+			deferFrameType := c.ctx.StructType(valueTypes, false)
+			deferFramePtr := c.builder.CreateBitCast(deferData, llvm.PointerType(deferFrameType, 0), "deferFrame")
 
 			// Extract the params from the struct.
 			forwardParams := []llvm.Value{}
-			zero := llvm.ConstInt(b.ctx.Int32Type(), 0, false)
+			zero := llvm.ConstInt(c.ctx.Int32Type(), 0, false)
 			for i := 2; i < len(valueTypes); i++ {
-				gep := b.CreateInBoundsGEP(deferredCallType, deferredCallPtr, []llvm.Value{zero, llvm.ConstInt(b.ctx.Int32Type(), uint64(i), false)}, "")
-				forwardParam := b.CreateLoad(valueTypes[i], gep, "param")
+				gep := c.builder.CreateGEP(deferFramePtr, []llvm.Value{zero, llvm.ConstInt(c.ctx.Int32Type(), uint64(i), false)}, "")
+				forwardParam := c.builder.CreateLoad(gep, "param")
 				forwardParams = append(forwardParams, forwardParam)
 			}
 
 			// Call deferred function.
-			fnType, llvmFn := b.getFunction(fn)
-			b.createCall(fnType, llvmFn, forwardParams, "")
-		case *ssa.Builtin:
-			db := b.deferBuiltinFuncs[callback]
+			c.createCall(fn.LLVMFn, forwardParams, "")
 
-			//Get parameter types
-			valueTypes := []llvm.Type{b.uintptrType, llvm.PointerType(b.getLLVMRuntimeType("_defer"), 0)}
-
-			//Get signature from call results
-			params := callback.Type().Underlying().(*types.Signature).Params()
-			for i := 0; i < params.Len(); i++ {
-				valueTypes = append(valueTypes, b.getLLVMType(params.At(i).Type()))
-			}
-
-			deferredCallType := b.ctx.StructType(valueTypes, false)
-			deferredCallPtr := b.CreateBitCast(deferData, llvm.PointerType(deferredCallType, 0), "defercall")
-
-			// Extract the params from the struct.
-			var argValues []llvm.Value
-			zero := llvm.ConstInt(b.ctx.Int32Type(), 0, false)
-			for i := 0; i < params.Len(); i++ {
-				gep := b.CreateInBoundsGEP(deferredCallType, deferredCallPtr, []llvm.Value{zero, llvm.ConstInt(b.ctx.Int32Type(), uint64(i+2), false)}, "gep")
-				forwardParam := b.CreateLoad(valueTypes[i+2], gep, "param")
-				argValues = append(argValues, forwardParam)
-			}
-
-			_, err := b.createBuiltin(db.argTypes, argValues, db.callName, db.pos)
-			if err != nil {
-				b.diagnostics = append(b.diagnostics, err)
-			}
 		default:
 			panic("unknown deferred function type")
 		}
 
 		// Branch back to the start of the loop.
-		b.CreateBr(loophead)
+		c.builder.CreateBr(loophead)
 	}
 
 	// Create default unreachable block:
 	//     default:
 	//         unreachable
 	//     }
-	b.SetInsertPointAtEnd(unreachable)
-	b.CreateUnreachable()
+	c.builder.SetInsertPointAtEnd(unreachable)
+	c.builder.CreateUnreachable()
 
 	// End of loop.
-	b.SetInsertPointAtEnd(end)
+	c.builder.SetInsertPointAtEnd(end)
+	return nil
 }

compiler/errors.go

@@ -1,54 +1,14 @@
 package compiler
 
-// This file contains some utility functions related to error handling.
-
 import (
 	"go/token"
 	"go/types"
-	"path/filepath"
-
-	"tinygo.org/x/go-llvm"
 )
 
-// makeError makes it easy to create an error from a token.Pos with a message.
-func (c *compilerContext) makeError(pos token.Pos, msg string) types.Error {
+func (c *Compiler) makeError(pos token.Pos, msg string) types.Error {
 	return types.Error{
-		Fset: c.program.Fset,
+		Fset: c.ir.Program.Fset,
 		Pos:  pos,
 		Msg:  msg,
 	}
 }
-
-// addError adds a new compiler diagnostic with the given location and message.
-func (c *compilerContext) addError(pos token.Pos, msg string) {
-	c.diagnostics = append(c.diagnostics, c.makeError(pos, msg))
-}
-
-// getPosition returns the position information for the given value, as far as
-// it is available.
-func getPosition(val llvm.Value) token.Position {
-	if !val.IsAInstruction().IsNil() {
-		loc := val.InstructionDebugLoc()
-		if loc.IsNil() {
-			return token.Position{}
-		}
-		file := loc.LocationScope().ScopeFile()
-		return token.Position{
-			Filename: filepath.Join(file.FileDirectory(), file.FileFilename()),
-			Line:     int(loc.LocationLine()),
-			Column:   int(loc.LocationColumn()),
-		}
-	} else if !val.IsAFunction().IsNil() {
-		loc := val.Subprogram()
-		if loc.IsNil() {
-			return token.Position{}
-		}
-		file := loc.ScopeFile()
-		return token.Position{
-			Filename: filepath.Join(file.FileDirectory(), file.FileFilename()),
-			Line:     int(loc.SubprogramLine()),
-		}
-	} else {
-		return token.Position{}
-	}
-}

compiler/func.go

@@ -1,149 +0,0 @@
-package compiler
-
-// This file implements function values and closures. It may need some lowering
-// in a later step, see func-lowering.go.
-
-import (
-	"go/types"
-
-	"golang.org/x/tools/go/ssa"
-	"tinygo.org/x/go-llvm"
-)
-
-// createFuncValue creates a function value from a raw function pointer with no
-// context.
-func (b *builder) createFuncValue(funcPtr, context llvm.Value, sig *types.Signature) llvm.Value {
-	return b.compilerContext.createFuncValue(b.Builder, funcPtr, context, sig)
-}
-
-// createFuncValue creates a function value from a raw function pointer with no
-// context.
-func (c *compilerContext) createFuncValue(builder llvm.Builder, funcPtr, context llvm.Value, sig *types.Signature) llvm.Value {
-	// Closure is: {context, function pointer}
-	funcValueScalar := llvm.ConstBitCast(funcPtr, c.rawVoidFuncType)
-	funcValueType := c.getFuncType(sig)
-	funcValue := llvm.Undef(funcValueType)
-	funcValue = builder.CreateInsertValue(funcValue, context, 0, "")
-	funcValue = builder.CreateInsertValue(funcValue, funcValueScalar, 1, "")
-	return funcValue
-}
-
-// getFuncSignatureID returns a new external global for a given signature. This
-// global reference is not real, it is only used during func lowering to assign
-// signature types to functions and will then be removed.
-func (c *compilerContext) getFuncSignatureID(sig *types.Signature) llvm.Value {
-	s, _ := getTypeCodeName(sig)
-	sigGlobalName := "reflect/types.funcid:" + s
-	sigGlobal := c.mod.NamedGlobal(sigGlobalName)
-	if sigGlobal.IsNil() {
-		sigGlobal = llvm.AddGlobal(c.mod, c.ctx.Int8Type(), sigGlobalName)
-		sigGlobal.SetGlobalConstant(true)
-	}
-	return sigGlobal
-}
-
-// extractFuncScalar returns some scalar that can be used in comparisons. It is
-// a cheap operation.
-func (b *builder) extractFuncScalar(funcValue llvm.Value) llvm.Value {
-	return b.CreateExtractValue(funcValue, 1, "")
-}
-
-// extractFuncContext extracts the context pointer from this function value. It
-// is a cheap operation.
-func (b *builder) extractFuncContext(funcValue llvm.Value) llvm.Value {
-	return b.CreateExtractValue(funcValue, 0, "")
-}
-
-// decodeFuncValue extracts the context and the function pointer from this func
-// value. This may be an expensive operation.
-func (b *builder) decodeFuncValue(funcValue llvm.Value, sig *types.Signature) (funcType llvm.Type, funcPtr, context llvm.Value) {
-	context = b.CreateExtractValue(funcValue, 0, "")
-	funcPtr = b.CreateExtractValue(funcValue, 1, "")
-	if !funcPtr.IsAConstantExpr().IsNil() && funcPtr.Opcode() == llvm.BitCast {
-		funcPtr = funcPtr.Operand(0) // needed for LLVM 14 (no opaque pointers)
-	}
-	if sig != nil {
-		funcType = b.getRawFuncType(sig)
-		llvmSig := llvm.PointerType(funcType, b.funcPtrAddrSpace)
-		funcPtr = b.CreateBitCast(funcPtr, llvmSig, "")
-	}
-	return
-}
-
-// getFuncType returns the type of a func value given a signature.
-func (c *compilerContext) getFuncType(typ *types.Signature) llvm.Type {
-	return c.ctx.StructType([]llvm.Type{c.i8ptrType, c.rawVoidFuncType}, false)
-}
-
-// getRawFuncType returns a LLVM function type for a given signature.
-func (c *compilerContext) getRawFuncType(typ *types.Signature) llvm.Type {
-	// Get the return type.
-	var returnType llvm.Type
-	switch typ.Results().Len() {
-	case 0:
-		// No return values.
-		returnType = c.ctx.VoidType()
-	case 1:
-		// Just one return value.
-		returnType = c.getLLVMType(typ.Results().At(0).Type())
-	default:
-		// Multiple return values. Put them together in a struct.
-		// This appears to be the common way to handle multiple return values in
-		// LLVM.
-		members := make([]llvm.Type, typ.Results().Len())
-		for i := 0; i < typ.Results().Len(); i++ {
-			members[i] = c.getLLVMType(typ.Results().At(i).Type())
-		}
-		returnType = c.ctx.StructType(members, false)
-	}
-
-	// Get the parameter types.
-	var paramTypes []llvm.Type
-	if typ.Recv() != nil {
-		recv := c.getLLVMType(typ.Recv().Type())
-		if recv.StructName() == "runtime._interface" {
-			// This is a call on an interface, not a concrete type.
-			// The receiver is not an interface, but a i8* type.
-			recv = c.i8ptrType
-		}
-		for _, info := range c.expandFormalParamType(recv, "", nil) {
-			paramTypes = append(paramTypes, info.llvmType)
-		}
-	}
-	for i := 0; i < typ.Params().Len(); i++ {
-		subType := c.getLLVMType(typ.Params().At(i).Type())
-		for _, info := range c.expandFormalParamType(subType, "", nil) {
-			paramTypes = append(paramTypes, info.llvmType)
-		}
-	}
-	// All functions take these parameters at the end.
-	paramTypes = append(paramTypes, c.i8ptrType) // context
-
-	// Make a func type out of the signature.
-	return llvm.FunctionType(returnType, paramTypes, false)
-}
-
-// parseMakeClosure makes a function value (with context) from the given
-// closure expression.
-func (b *builder) parseMakeClosure(expr *ssa.MakeClosure) (llvm.Value, error) {
-	if len(expr.Bindings) == 0 {
-		panic("unexpected: MakeClosure without bound variables")
-	}
-	f := expr.Fn.(*ssa.Function)
-
-	// Collect all bound variables.
-	boundVars := make([]llvm.Value, len(expr.Bindings))
-	for i, binding := range expr.Bindings {
-		// The context stores the bound variables.
-		llvmBoundVar := b.getValue(binding, getPos(expr))
-		boundVars[i] = llvmBoundVar
-	}
-
-	// Store the bound variables in a single object, allocating it on the heap
-	// if necessary.
-	context := b.emitPointerPack(boundVars)
-
-	// Create the closure.
-	_, fn := b.getFunction(f)
-	return b.createFuncValue(fn, context, f.Signature), nil
-}

compiler/gc-pass-shadowstack.go

@@ -0,0 +1,199 @@
+package compiler
+
+// This file implements a compiler pass to move GC pointers to a "shadow stack"
+// that can easily be scanned by a garbage collector, even without platform
+// support.
+// For more information, see:
+//    https://llvm.org/docs/GarbageCollection.html#the-shadow-stack-gc
+
+import (
+	"github.com/aykevl/go-llvm"
+)
+
+// AddGCRoots moves pointer values to shadow stack frames when this function (or
+// any function it calls) may allocate something. This allows the GC to scan the
+// stack in a highly portable way.
+func (c *Compiler) AddGCRoots() {
+	alloc := c.mod.NamedFunction("runtime.alloc")
+	if alloc.IsNil() {
+		return
+	}
+
+	// Find all functions that do memory allocation.
+	worklist := []llvm.Value{alloc}
+	allocSet := make(map[llvm.Value]struct{})
+	allocList := make([]llvm.Value, 0, 4)
+	for len(worklist) != 0 {
+		// Pick the topmost.
+		f := worklist[len(worklist)-1]
+		worklist = worklist[:len(worklist)-1]
+		if _, ok := allocSet[f]; ok {
+			continue // already added to list
+		}
+		// Add to set of allocating functions.
+		allocSet[f] = struct{}{}
+		allocList = append(allocList, f)
+
+		// Add all callees to the worklist.
+		for _, use := range getUses(f) {
+			if use.IsACallInst().IsNil() {
+				// TODO: function pointers
+				panic("allocating function " + f.Name() + " used as function pointer")
+			}
+			parent := use.InstructionParent().Parent()
+			for i := 0; i < use.OperandsCount()-1; i++ {
+				if use.Operand(i) == f {
+					// TODO: function pointers
+					panic("allocating function " + f.Name() + " used as function pointer in " + parent.Name())
+				}
+			}
+			worklist = append(worklist, parent)
+		}
+	}
+
+	i8ptrPtrType := llvm.PointerType(c.i8ptrType, 0)
+	gcrootType := llvm.FunctionType(c.ctx.VoidType(), []llvm.Type{i8ptrPtrType, c.i8ptrType}, false)
+	gcroot := llvm.AddFunction(c.mod, "llvm.gcroot", gcrootType)
+
+	// Process every function that needs to save pointers to the shadow stack.
+	for _, fn := range allocList {
+		if fn == alloc {
+			// runtime.alloc itself should not be treated this way, it is a
+			// special case.
+			continue
+		}
+
+		// Check all instructions in this function and see whether the value
+		// needs to be kept on the shadow stack.
+		var values []llvm.Value // values to be kept in the shadow stack
+		for bb := fn.EntryBasicBlock(); !bb.IsNil(); bb = llvm.NextBasicBlock(bb) {
+			for inst := bb.FirstInstruction(); !inst.IsNil(); inst = llvm.NextInstruction(inst) {
+				if !typeHasPointer(inst.Type()) {
+					// This instruction does not result in a pointer value.
+					continue
+				}
+				// Check whether any of the uses may occur after a call to
+				// runtime.alloca. For example, if there are no call
+				// instructions between the definition and the use, then the
+				// pointer does not have to be stored in the shadow stack.
+				for _, use := range getUses(inst) {
+					if crossesAllocatingInst(inst, use, allocSet) {
+						values = append(values, inst)
+						break
+					}
+				}
+			}
+		}
+		if len(values) == 0 {
+			// The children of this function do allocations, but there is
+			// nothing to keep in a stack frame for this function.
+			continue
+		}
+		fn.SetGC("shadow-stack")
+
+		// Convert all values to be kept in the shadow stack to actually be in
+		// the shadow stack.
+		firstInst := fn.EntryBasicBlock().FirstInstruction()
+		for _, value := range values {
+			valueUses := getUses(value)
+			c.builder.SetInsertPointBefore(firstInst)
+			alloca := c.builder.CreateAlloca(value.Type(), "gcroot.value")
+			c.builder.SetInsertPointBefore(llvm.NextInstruction(value))
+			c.builder.CreateStore(value, alloca)
+			metadata := c.gcTypeMetadata(alloca.Type().ElementType())
+			allocaCast := alloca
+			if alloca.Type() != i8ptrPtrType {
+				allocaCast = c.builder.CreateBitCast(alloca, i8ptrPtrType, "")
+			}
+			c.builder.CreateCall(gcroot, []llvm.Value{allocaCast, metadata}, "")
+			for _, use := range valueUses {
+				c.builder.SetInsertPointBefore(use)
+				load := c.builder.CreateLoad(alloca, "")
+				for i := 0; i < use.OperandsCount(); i++ {
+					if use.Operand(i) == value {
+						use.SetOperand(i, load)
+					}
+				}
+			}
+		}
+	}
+	println(c.IR())
+}
+
+// typeHasPointer returns true if (and only if) the given type contains a
+// pointer value.
+func typeHasPointer(typ llvm.Type) bool {
+	switch typ.TypeKind() {
+	case llvm.PointerTypeKind:
+		return true
+	case llvm.ArrayTypeKind, llvm.VectorTypeKind:
+		return typeHasPointer(typ.ElementType())
+	case llvm.StructTypeKind:
+		return false
+		for _, subtyp := range typ.StructElementTypes() {
+			if typeHasPointer(subtyp) {
+				return true
+			}
+		}
+		return false
+	default:
+		return false
+	}
+}
+
+// gcTypeMetadata returns a pointer value to be used in the llvm.gcroot
+// intrinsic. It is either a null pointer or a number which is the number of
+// words in the stack slot for this value.
+func (c *Compiler) gcTypeMetadata(typ llvm.Type) llvm.Value {
+	if typ.TypeKind() == llvm.PointerTypeKind {
+		// Simple pointer. This is a common case, so signal this fact by setting
+		// the pointer to null.
+		return llvm.ConstPointerNull(c.i8ptrType)
+	}
+	if typ.TypeKind() == llvm.StructTypeKind {
+		// Check for structs that only contain a pointer at the start.
+		// We can pretend that such structs are a simple pointer, as the GC only
+		// needs to read the first word.
+		subTypes := typ.StructElementTypes()
+		onlyFirstPointer := subTypes[0].TypeKind() == llvm.PointerTypeKind
+		for _, subType := range subTypes[1:] {
+			if typeHasPointer(subType) {
+				onlyFirstPointer = false
+			}
+		}
+		if onlyFirstPointer {
+			// Types like string and slice.
+			return llvm.ConstPointerNull(c.i8ptrType)
+		}
+	}
+	allocaSize := c.targetData.TypeAllocSize(typ)
+	pointerAlignment := uint64(c.targetData.PrefTypeAlignment(c.i8ptrType))
+	numWords := allocaSize / pointerAlignment
+	// TODO: only return the number until all pointers are included in this
+	// struct, not more.
+	metadata := llvm.ConstIntToPtr(llvm.ConstInt(c.uintptrType, numWords, false), c.i8ptrType)
+	return metadata
+}
+
+// crossesAllocatingInst returns true if the given value may be used across a
+// call to runtime.alloc. This check is very conservative.
+func crossesAllocatingInst(from, to llvm.Value, allocSet map[llvm.Value]struct{}) bool {
+	if from.InstructionParent() != to.InstructionParent() {
+		// Don't try to check the CFG, conservatively assume there is an alloca
+		// in between these instructions.
+		return true
+	}
+	for inst := llvm.NextInstruction(from); inst != to; inst = llvm.NextInstruction(inst) {
+		if inst.IsACallInst().IsNil() {
+			// Not a call instruction thus not an alloca instruction.
+			continue
+		}
+		if _, ok := allocSet[inst.CalledValue()]; ok {
+			// This call is to a function that may do an allocation, or is even
+			// runtime.alloc itself.
+			// TODO: function pointers
+			return true
+		}
+	}
+	return false
+}

compiler/gc.go

@@ -1,112 +0,0 @@
-package compiler
-
-// This file provides IR transformations necessary for precise and portable
-// garbage collectors.
-
-import (
-	"go/token"
-
-	"golang.org/x/tools/go/ssa"
-	"tinygo.org/x/go-llvm"
-)
-
-// trackExpr inserts pointer tracking intrinsics for the GC if the expression is
-// one of the expressions that need this.
-func (b *builder) trackExpr(expr ssa.Value, value llvm.Value) {
-	// There are uses of this expression, Make sure the pointers
-	// are tracked during GC.
-	switch expr := expr.(type) {
-	case *ssa.Alloc, *ssa.MakeChan, *ssa.MakeMap:
-		// These values are always of pointer type in IR.
-		b.trackPointer(value)
-	case *ssa.Call, *ssa.Convert, *ssa.MakeClosure, *ssa.MakeInterface, *ssa.MakeSlice, *ssa.Next:
-		if !value.IsNil() {
-			b.trackValue(value)
-		}
-	case *ssa.Select:
-		if alloca, ok := b.selectRecvBuf[expr]; ok {
-			if alloca.IsAUndefValue().IsNil() {
-				b.trackPointer(alloca)
-			}
-		}
-	case *ssa.UnOp:
-		switch expr.Op {
-		case token.MUL:
-			// Pointer dereference.
-			b.trackValue(value)
-		case token.ARROW:
-			// Channel receive operator.
-			// It's not necessary to look at commaOk here, because in that
-			// case it's just an aggregate and trackValue will extract the
-			// pointer in there (if there is one).
-			b.trackValue(value)
-		}
-	case *ssa.BinOp:
-		switch expr.Op {
-		case token.ADD:
-			// String concatenation.
-			b.trackValue(value)
-		}
-	}
-}
-
-// trackValue locates pointers in a value (possibly an aggregate) and tracks the
-// individual pointers
-func (b *builder) trackValue(value llvm.Value) {
-	typ := value.Type()
-	switch typ.TypeKind() {
-	case llvm.PointerTypeKind:
-		b.trackPointer(value)
-	case llvm.StructTypeKind:
-		if !typeHasPointers(typ) {
-			return
-		}
-		numElements := typ.StructElementTypesCount()
-		for i := 0; i < numElements; i++ {
-			subValue := b.CreateExtractValue(value, i, "")
-			b.trackValue(subValue)
-		}
-	case llvm.ArrayTypeKind:
-		if !typeHasPointers(typ) {
-			return
-		}
-		numElements := typ.ArrayLength()
-		for i := 0; i < numElements; i++ {
-			subValue := b.CreateExtractValue(value, i, "")
-			b.trackValue(subValue)
-		}
-	}
-}
-
-// trackPointer creates a call to runtime.trackPointer, bitcasting the poitner
-// first if needed. The input value must be of LLVM pointer type.
-func (b *builder) trackPointer(value llvm.Value) {
-	if value.Type() != b.i8ptrType {
-		value = b.CreateBitCast(value, b.i8ptrType, "")
-	}
-	b.createRuntimeCall("trackPointer", []llvm.Value{value, b.stackChainAlloca}, "")
-}
-
-// typeHasPointers returns whether this type is a pointer or contains pointers.
-// If the type is an aggregate type, it will check whether there is a pointer
-// inside.
-func typeHasPointers(t llvm.Type) bool {
-	switch t.TypeKind() {
-	case llvm.PointerTypeKind:
-		return true
-	case llvm.StructTypeKind:
-		for _, subType := range t.StructElementTypes() {
-			if typeHasPointers(subType) {
-				return true
-			}
-		}
-		return false
-	case llvm.ArrayTypeKind:
-		if typeHasPointers(t.ElementType()) {
-			return true
-		}
-		return false
-	default:
-		return false
-	}
-}

compiler/goroutine.go

@@ -1,298 +0,0 @@
-package compiler
-
-// This file implements the 'go' keyword to start a new goroutine. See
-// goroutine-lowering.go for more details.
-
-import (
-	"go/token"
-	"go/types"
-
-	"golang.org/x/tools/go/ssa"
-	"tinygo.org/x/go-llvm"
-)
-
-// createGo emits code to start a new goroutine.
-func (b *builder) createGo(instr *ssa.Go) {
-	// Get all function parameters to pass to the goroutine.
-	var params []llvm.Value
-	for _, param := range instr.Call.Args {
-		params = append(params, b.getValue(param, getPos(instr)))
-	}
-
-	var prefix string
-	var funcPtr llvm.Value
-	var funcPtrType llvm.Type
-	hasContext := false
-	if callee := instr.Call.StaticCallee(); callee != nil {
-		// Static callee is known. This makes it easier to start a new
-		// goroutine.
-		var context llvm.Value
-		switch value := instr.Call.Value.(type) {
-		case *ssa.Function:
-			// Goroutine call is regular function call. No context is necessary.
-		case *ssa.MakeClosure:
-			// A goroutine call on a func value, but the callee is trivial to find. For
-			// example: immediately applied functions.
-			funcValue := b.getValue(value, getPos(instr))
-			context = b.extractFuncContext(funcValue)
-		default:
-			panic("StaticCallee returned an unexpected value")
-		}
-		if !context.IsNil() {
-			params = append(params, context) // context parameter
-			hasContext = true
-		}
-		funcPtrType, funcPtr = b.getFunction(callee)
-	} else if builtin, ok := instr.Call.Value.(*ssa.Builtin); ok {
-		// We cheat. None of the builtins do any long or blocking operation, so
-		// we might as well run these builtins right away without the program
-		// noticing the difference.
-		// Possible exceptions:
-		//   - copy: this is a possibly long operation, but not a blocking
-		//     operation. Semantically it makes no difference to run it right
-		//     away (not in a goroutine). However, in practice it makes no sense
-		//     to run copy in a goroutine as there is no way to (safely) know
-		//     when it is finished.
-		//   - panic: the error message would appear in the parent goroutine.
-		//     But because `go panic("err")` would halt the program anyway
-		//     (there is no recover), panicking right away would give the same
-		//     behavior as creating a goroutine, switching the scheduler to that
-		//     goroutine, and panicking there. So this optimization seems
-		//     correct.
-		//   - recover: because it runs in a new goroutine, it is never a
-		//     deferred function. Thus this is a no-op.
-		if builtin.Name() == "recover" {
-			// This is a no-op, even in a deferred function:
-			//   go recover()
-			return
-		}
-		var argTypes []types.Type
-		var argValues []llvm.Value
-		for _, arg := range instr.Call.Args {
-			argTypes = append(argTypes, arg.Type())
-			argValues = append(argValues, b.getValue(arg, getPos(instr)))
-		}
-		b.createBuiltin(argTypes, argValues, builtin.Name(), instr.Pos())
-		return
-	} else if instr.Call.IsInvoke() {
-		// This is a method call on an interface value.
-		itf := b.getValue(instr.Call.Value, getPos(instr))
-		itfTypeCode := b.CreateExtractValue(itf, 0, "")
-		itfValue := b.CreateExtractValue(itf, 1, "")
-		funcPtr = b.getInvokeFunction(&instr.Call)
-		funcPtrType = funcPtr.GlobalValueType()
-		params = append([]llvm.Value{itfValue}, params...) // start with receiver
-		params = append(params, itfTypeCode)               // end with typecode
-	} else {
-		// This is a function pointer.
-		// At the moment, two extra params are passed to the newly started
-		// goroutine:
-		//   * The function context, for closures.
-		//   * The function pointer (for tasks).
-		var context llvm.Value
-		funcPtrType, funcPtr, context = b.decodeFuncValue(b.getValue(instr.Call.Value, getPos(instr)), instr.Call.Value.Type().Underlying().(*types.Signature))
-		params = append(params, context, funcPtr)
-		hasContext = true
-		prefix = b.fn.RelString(nil)
-	}
-
-	paramBundle := b.emitPointerPack(params)
-	var stackSize llvm.Value
-	callee := b.createGoroutineStartWrapper(funcPtrType, funcPtr, prefix, hasContext, instr.Pos())
-	if b.AutomaticStackSize {
-		// The stack size is not known until after linking. Call a dummy
-		// function that will be replaced with a load from a special ELF
-		// section that contains the stack size (and is modified after
-		// linking).
-		stackSizeFnType, stackSizeFn := b.getFunction(b.program.ImportedPackage("internal/task").Members["getGoroutineStackSize"].(*ssa.Function))
-		stackSize = b.createCall(stackSizeFnType, stackSizeFn, []llvm.Value{callee, llvm.Undef(b.i8ptrType)}, "stacksize")
-	} else {
-		// The stack size is fixed at compile time. By emitting it here as a
-		// constant, it can be optimized.
-		if (b.Scheduler == "tasks" || b.Scheduler == "asyncify") && b.DefaultStackSize == 0 {
-			b.addError(instr.Pos(), "default stack size for goroutines is not set")
-		}
-		stackSize = llvm.ConstInt(b.uintptrType, b.DefaultStackSize, false)
-	}
-	fnType, start := b.getFunction(b.program.ImportedPackage("internal/task").Members["start"].(*ssa.Function))
-	b.createCall(fnType, start, []llvm.Value{callee, paramBundle, stackSize, llvm.Undef(b.i8ptrType)}, "")
-}
-
-// createGoroutineStartWrapper creates a wrapper for the task-based
-// implementation of goroutines. For example, to call a function like this:
-//
-//	func add(x, y int) int { ... }
-//
-// It creates a wrapper like this:
-//
-//	func add$gowrapper(ptr *unsafe.Pointer) {
-//	    args := (*struct{
-//	        x, y int
-//	    })(ptr)
-//	    add(args.x, args.y)
-//	}
-//
-// This is useful because the task-based goroutine start implementation only
-// allows a single (pointer) argument to the newly started goroutine. Also, it
-// ignores the return value because newly started goroutines do not have a
-// return value.
-//
-// The hasContext parameter indicates whether the context parameter (the second
-// to last parameter of the function) is used for this wrapper. If hasContext is
-// false, the parameter bundle is assumed to have no context parameter and undef
-// is passed instead.
-func (c *compilerContext) createGoroutineStartWrapper(fnType llvm.Type, fn llvm.Value, prefix string, hasContext bool, pos token.Pos) llvm.Value {
-	var wrapper llvm.Value
-
-	b := &builder{
-		compilerContext: c,
-		Builder:         c.ctx.NewBuilder(),
-	}
-	defer b.Dispose()
-
-	var deadlock llvm.Value
-	var deadlockType llvm.Type
-	if c.Scheduler == "asyncify" {
-		deadlockType, deadlock = c.getFunction(c.program.ImportedPackage("runtime").Members["deadlock"].(*ssa.Function))
-	}
-
-	if !fn.IsAFunction().IsNil() {
-		// See whether this wrapper has already been created. If so, return it.
-		name := fn.Name()
-		wrapper = c.mod.NamedFunction(name + "$gowrapper")
-		if !wrapper.IsNil() {
-			return llvm.ConstPtrToInt(wrapper, c.uintptrType)
-		}
-
-		// Create the wrapper.
-		wrapperType := llvm.FunctionType(c.ctx.VoidType(), []llvm.Type{c.i8ptrType}, false)
-		wrapper = llvm.AddFunction(c.mod, name+"$gowrapper", wrapperType)
-		c.addStandardAttributes(wrapper)
-		wrapper.SetLinkage(llvm.LinkOnceODRLinkage)
-		wrapper.SetUnnamedAddr(true)
-		wrapper.AddAttributeAtIndex(-1, c.ctx.CreateStringAttribute("tinygo-gowrapper", name))
-		entry := c.ctx.AddBasicBlock(wrapper, "entry")
-		b.SetInsertPointAtEnd(entry)
-
-		if c.Debug {
-			pos := c.program.Fset.Position(pos)
-			diFuncType := c.dibuilder.CreateSubroutineType(llvm.DISubroutineType{
-				File:       c.getDIFile(pos.Filename),
-				Parameters: nil, // do not show parameters in debugger
-				Flags:      0,   // ?
-			})
-			difunc := c.dibuilder.CreateFunction(c.getDIFile(pos.Filename), llvm.DIFunction{
-				Name:         "<goroutine wrapper>",
-				File:         c.getDIFile(pos.Filename),
-				Line:         pos.Line,
-				Type:         diFuncType,
-				LocalToUnit:  true,
-				IsDefinition: true,
-				ScopeLine:    0,
-				Flags:        llvm.FlagPrototyped,
-				Optimized:    true,
-			})
-			wrapper.SetSubprogram(difunc)
-			b.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), difunc, llvm.Metadata{})
-		}
-
-		// Create the list of params for the call.
-		paramTypes := fnType.ParamTypes()
-		if !hasContext {
-			paramTypes = paramTypes[:len(paramTypes)-1] // strip context parameter
-		}
-		params := b.emitPointerUnpack(wrapper.Param(0), paramTypes)
-		if !hasContext {
-			params = append(params, llvm.Undef(c.i8ptrType)) // add dummy context parameter
-		}
-
-		// Create the call.
-		b.CreateCall(fnType, fn, params, "")
-
-		if c.Scheduler == "asyncify" {
-			b.CreateCall(deadlockType, deadlock, []llvm.Value{
-				llvm.Undef(c.i8ptrType),
-			}, "")
-		}
-
-	} else {
-		// For a function pointer like this:
-		//
-		//     var funcPtr func(x, y int) int
-		//
-		// A wrapper like the following is created:
-		//
-		//     func .gowrapper(ptr *unsafe.Pointer) {
-		//         args := (*struct{
-		//             x, y int
-		//             fn   func(x, y int) int
-		//         })(ptr)
-		//         args.fn(x, y)
-		//     }
-		//
-		// With a bit of luck, identical wrapper functions like these can be
-		// merged into one.
-
-		// Create the wrapper.
-		wrapperType := llvm.FunctionType(c.ctx.VoidType(), []llvm.Type{c.i8ptrType}, false)
-		wrapper = llvm.AddFunction(c.mod, prefix+".gowrapper", wrapperType)
-		c.addStandardAttributes(wrapper)
-		wrapper.SetLinkage(llvm.LinkOnceODRLinkage)
-		wrapper.SetUnnamedAddr(true)
-		wrapper.AddAttributeAtIndex(-1, c.ctx.CreateStringAttribute("tinygo-gowrapper", ""))
-		entry := c.ctx.AddBasicBlock(wrapper, "entry")
-		b.SetInsertPointAtEnd(entry)
-
-		if c.Debug {
-			pos := c.program.Fset.Position(pos)
-			diFuncType := c.dibuilder.CreateSubroutineType(llvm.DISubroutineType{
-				File:       c.getDIFile(pos.Filename),
-				Parameters: nil, // do not show parameters in debugger
-				Flags:      0,   // ?
-			})
-			difunc := c.dibuilder.CreateFunction(c.getDIFile(pos.Filename), llvm.DIFunction{
-				Name:         "<goroutine wrapper>",
-				File:         c.getDIFile(pos.Filename),
-				Line:         pos.Line,
-				Type:         diFuncType,
-				LocalToUnit:  true,
-				IsDefinition: true,
-				ScopeLine:    0,
-				Flags:        llvm.FlagPrototyped,
-				Optimized:    true,
-			})
-			wrapper.SetSubprogram(difunc)
-			b.SetCurrentDebugLocation(uint(pos.Line), uint(pos.Column), difunc, llvm.Metadata{})
-		}
-
-		// Get the list of parameters, with the extra parameters at the end.
-		paramTypes := fnType.ParamTypes()
-		paramTypes = append(paramTypes, fn.Type()) // the last element is the function pointer
-		params := b.emitPointerUnpack(wrapper.Param(0), paramTypes)
-
-		// Get the function pointer.
-		fnPtr := params[len(params)-1]
-		params = params[:len(params)-1]
-
-		// Create the call.
-		b.CreateCall(fnType, fnPtr, params, "")
-
-		if c.Scheduler == "asyncify" {
-			b.CreateCall(deadlockType, deadlock, []llvm.Value{
-				llvm.Undef(c.i8ptrType),
-			}, "")
-		}
-	}
-
-	if c.Scheduler == "asyncify" {
-		// The goroutine was terminated via deadlock.
-		b.CreateUnreachable()
-	} else {
-		// Finish the function. Every basic block must end in a terminator, and
-		// because goroutines never return a value we can simply return void.
-		b.CreateRetVoid()
-	}
-
-	// Return a ptrtoint of the wrapper, not the function itself.
-	return b.CreatePtrToInt(wrapper, c.uintptrType, "")
-}

compiler/inlineasm.go

@@ -1,251 +0,0 @@
-package compiler
-
-// This file implements inline asm support by calling special functions.
-
-import (
-	"fmt"
-	"go/constant"
-	"go/token"
-	"regexp"
-	"strconv"
-	"strings"
-
-	"golang.org/x/tools/go/ssa"
-	"tinygo.org/x/go-llvm"
-)
-
-// This is a compiler builtin, which emits a piece of inline assembly with no
-// operands or return values. It is useful for trivial instructions, like wfi in
-// ARM or sleep in AVR.
-//
-//	func Asm(asm string)
-//
-// The provided assembly must be a constant.
-func (b *builder) createInlineAsm(args []ssa.Value) (llvm.Value, error) {
-	// Magic function: insert inline assembly instead of calling it.
-	fnType := llvm.FunctionType(b.ctx.VoidType(), []llvm.Type{}, false)
-	asm := constant.StringVal(args[0].(*ssa.Const).Value)
-	target := llvm.InlineAsm(fnType, asm, "", true, false, 0, false)
-	return b.CreateCall(fnType, target, nil, ""), nil
-}
-
-// This is a compiler builtin, which allows assembly to be called in a flexible
-// way.
-//
-//	func AsmFull(asm string, regs map[string]interface{}) uintptr
-//
-// The asm parameter must be a constant string. The regs parameter must be
-// provided immediately. For example:
-//
-//	arm.AsmFull(
-//	    "str {value}, {result}",
-//	    map[string]interface{}{
-//	        "value":  1
-//	        "result": &dest,
-//	    })
-func (b *builder) createInlineAsmFull(instr *ssa.CallCommon) (llvm.Value, error) {
-	asmString := constant.StringVal(instr.Args[0].(*ssa.Const).Value)
-	registers := map[string]llvm.Value{}
-	if registerMap, ok := instr.Args[1].(*ssa.MakeMap); ok {
-		for _, r := range *registerMap.Referrers() {
-			switch r := r.(type) {
-			case *ssa.DebugRef:
-				// ignore
-			case *ssa.MapUpdate:
-				if r.Block() != registerMap.Block() {
-					return llvm.Value{}, b.makeError(instr.Pos(), "register value map must be created in the same basic block")
-				}
-				key := constant.StringVal(r.Key.(*ssa.Const).Value)
-				registers[key] = b.getValue(r.Value.(*ssa.MakeInterface).X, getPos(instr))
-			case *ssa.Call:
-				if r.Common() == instr {
-					break
-				}
-			default:
-				return llvm.Value{}, b.makeError(instr.Pos(), "don't know how to handle argument to inline assembly: "+r.String())
-			}
-		}
-	}
-	// TODO: handle dollar signs in asm string
-	registerNumbers := map[string]int{}
-	var err error
-	argTypes := []llvm.Type{}
-	args := []llvm.Value{}
-	constraints := []string{}
-	hasOutput := false
-	asmString = regexp.MustCompile(`\{\}`).ReplaceAllStringFunc(asmString, func(s string) string {
-		hasOutput = true
-		return "$0"
-	})
-	if hasOutput {
-		constraints = append(constraints, "=&r")
-		registerNumbers[""] = 0
-	}
-	asmString = regexp.MustCompile(`\{[a-zA-Z]+\}`).ReplaceAllStringFunc(asmString, func(s string) string {
-		// TODO: skip strings like {r4} etc. that look like ARM push/pop
-		// instructions.
-		name := s[1 : len(s)-1]
-		if _, ok := registers[name]; !ok {
-			if err == nil {
-				err = b.makeError(instr.Pos(), "unknown register name: "+name)
-			}
-			return s
-		}
-		if _, ok := registerNumbers[name]; !ok {
-			registerNumbers[name] = len(registerNumbers)
-			argTypes = append(argTypes, registers[name].Type())
-			args = append(args, registers[name])
-			switch registers[name].Type().TypeKind() {
-			case llvm.IntegerTypeKind:
-				constraints = append(constraints, "r")
-			case llvm.PointerTypeKind:
-				// Memory references require a type in LLVM 14, probably as a
-				// preparation for opaque pointers.
-				err = b.makeError(instr.Pos(), "support for pointer operands was dropped in TinyGo 0.23")
-				return s
-			default:
-				err = b.makeError(instr.Pos(), "unknown type in inline assembly for value: "+name)
-				return s
-			}
-		}
-		return fmt.Sprintf("${%v}", registerNumbers[name])
-	})
-	if err != nil {
-		return llvm.Value{}, err
-	}
-	var outputType llvm.Type
-	if hasOutput {
-		outputType = b.uintptrType
-	} else {
-		outputType = b.ctx.VoidType()
-	}
-	fnType := llvm.FunctionType(outputType, argTypes, false)
-	target := llvm.InlineAsm(fnType, asmString, strings.Join(constraints, ","), true, false, 0, false)
-	result := b.CreateCall(fnType, target, args, "")
-	if hasOutput {
-		return result, nil
-	} else {
-		// Make sure we return something valid.
-		return llvm.ConstInt(b.uintptrType, 0, false), nil
-	}
-}
-
-// This is a compiler builtin which emits an inline SVCall instruction. It can
-// be one of:
-//
-//	func SVCall0(num uintptr) uintptr
-//	func SVCall1(num uintptr, a1 interface{}) uintptr
-//	func SVCall2(num uintptr, a1, a2 interface{}) uintptr
-//	func SVCall3(num uintptr, a1, a2, a3 interface{}) uintptr
-//	func SVCall4(num uintptr, a1, a2, a3, a4 interface{}) uintptr
-//
-// The num parameter must be a constant. All other parameters may be any scalar
-// value supported by LLVM inline assembly.
-func (b *builder) emitSVCall(args []ssa.Value, pos token.Pos) (llvm.Value, error) {
-	num, _ := constant.Uint64Val(args[0].(*ssa.Const).Value)
-	llvmArgs := []llvm.Value{}
-	argTypes := []llvm.Type{}
-	asm := "svc #" + strconv.FormatUint(num, 10)
-	constraints := "={r0}"
-	for i, arg := range args[1:] {
-		arg = arg.(*ssa.MakeInterface).X
-		if i == 0 {
-			constraints += ",0"
-		} else {
-			constraints += ",{r" + strconv.Itoa(i) + "}"
-		}
-		llvmValue := b.getValue(arg, pos)
-		llvmArgs = append(llvmArgs, llvmValue)
-		argTypes = append(argTypes, llvmValue.Type())
-	}
-	// Implement the ARM calling convention by marking r1-r3 as
-	// clobbered. r0 is used as an output register so doesn't have to be
-	// marked as clobbered.
-	constraints += ",~{r1},~{r2},~{r3}"
-	fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
-	target := llvm.InlineAsm(fnType, asm, constraints, true, false, 0, false)
-	return b.CreateCall(fnType, target, llvmArgs, ""), nil
-}
-
-// This is a compiler builtin which emits an inline SVCall instruction. It can
-// be one of:
-//
-//	func SVCall0(num uintptr) uintptr
-//	func SVCall1(num uintptr, a1 interface{}) uintptr
-//	func SVCall2(num uintptr, a1, a2 interface{}) uintptr
-//	func SVCall3(num uintptr, a1, a2, a3 interface{}) uintptr
-//	func SVCall4(num uintptr, a1, a2, a3, a4 interface{}) uintptr
-//
-// The num parameter must be a constant. All other parameters may be any scalar
-// value supported by LLVM inline assembly.
-// Same as emitSVCall but for AArch64
-func (b *builder) emitSV64Call(args []ssa.Value, pos token.Pos) (llvm.Value, error) {
-	num, _ := constant.Uint64Val(args[0].(*ssa.Const).Value)
-	llvmArgs := []llvm.Value{}
-	argTypes := []llvm.Type{}
-	asm := "svc #" + strconv.FormatUint(num, 10)
-	constraints := "={x0}"
-	for i, arg := range args[1:] {
-		arg = arg.(*ssa.MakeInterface).X
-		if i == 0 {
-			constraints += ",0"
-		} else {
-			constraints += ",{x" + strconv.Itoa(i) + "}"
-		}
-		llvmValue := b.getValue(arg, pos)
-		llvmArgs = append(llvmArgs, llvmValue)
-		argTypes = append(argTypes, llvmValue.Type())
-	}
-	// Implement the ARM64 calling convention by marking x1-x7 as
-	// clobbered. x0 is used as an output register so doesn't have to be
-	// marked as clobbered.
-	constraints += ",~{x1},~{x2},~{x3},~{x4},~{x5},~{x6},~{x7}"
-	fnType := llvm.FunctionType(b.uintptrType, argTypes, false)
-	target := llvm.InlineAsm(fnType, asm, constraints, true, false, 0, false)
-	return b.CreateCall(fnType, target, llvmArgs, ""), nil
-}
-
-// This is a compiler builtin which emits CSR instructions. It can be one of:
-//
-//	func (csr CSR) Get() uintptr
-//	func (csr CSR) Set(uintptr)
-//	func (csr CSR) SetBits(uintptr) uintptr
-//	func (csr CSR) ClearBits(uintptr) uintptr
-//
-// The csr parameter (method receiver) must be a constant. Other parameter can
-// be any value.
-func (b *builder) emitCSROperation(call *ssa.CallCommon) (llvm.Value, error) {
-	csrConst, ok := call.Args[0].(*ssa.Const)
-	if !ok {
-		return llvm.Value{}, b.makeError(call.Pos(), "CSR must be constant")
-	}
-	csr := csrConst.Uint64()
-	switch name := call.StaticCallee().Name(); name {
-	case "Get":
-		// Note that this instruction may have side effects, and thus must be
-		// marked as such.
-		fnType := llvm.FunctionType(b.uintptrType, nil, false)
-		asm := fmt.Sprintf("csrr $0, %d", csr)
-		target := llvm.InlineAsm(fnType, asm, "=r", true, false, 0, false)
-		return b.CreateCall(fnType, target, nil, ""), nil
-	case "Set":
-		fnType := llvm.FunctionType(b.ctx.VoidType(), []llvm.Type{b.uintptrType}, false)
-		asm := fmt.Sprintf("csrw %d, $0", csr)
-		target := llvm.InlineAsm(fnType, asm, "r", true, false, 0, false)
-		return b.CreateCall(fnType, target, []llvm.Value{b.getValue(call.Args[1], getPos(call))}, ""), nil
-	case "SetBits":
-		// Note: it may be possible to optimize this to csrrsi in many cases.
-		fnType := llvm.FunctionType(b.uintptrType, []llvm.Type{b.uintptrType}, false)
-		asm := fmt.Sprintf("csrrs $0, %d, $1", csr)
-		target := llvm.InlineAsm(fnType, asm, "=r,r", true, false, 0, false)
-		return b.CreateCall(fnType, target, []llvm.Value{b.getValue(call.Args[1], getPos(call))}, ""), nil
-	case "ClearBits":
-		// Note: it may be possible to optimize this to csrrci in many cases.
-		fnType := llvm.FunctionType(b.uintptrType, []llvm.Type{b.uintptrType}, false)
-		asm := fmt.Sprintf("csrrc $0, %d, $1", csr)
-		target := llvm.InlineAsm(fnType, asm, "=r,r", true, false, 0, false)
-		return b.CreateCall(fnType, target, []llvm.Value{b.getValue(call.Args[1], getPos(call))}, ""), nil
-	default:
-		return llvm.Value{}, b.makeError(call.Pos(), "unknown CSR operation: "+name)
-	}
-}

compiler/interface-lowering.go

@@ -0,0 +1,715 @@
+package compiler
+
+// This file provides function to lower interface intrinsics to their final LLVM
+// form, optimizing them in the process.
+//
+// During SSA construction, the following pseudo-calls are created:
+//     runtime.makeInterface(typecode, methodSet)
+//     runtime.typeAssert(typecode, assertedType)
+//     runtime.interfaceImplements(typecode, interfaceMethodSet)
+//     runtime.interfaceMethod(typecode, interfaceMethodSet, signature)
+// See src/runtime/interface.go for details.
+// These calls are to declared but not defined functions, so the optimizer will
+// leave them alone.
+//
+// This pass lowers the above functions to their final form:
+//
+// makeInterface:
+//     Replaced with a constant typecode.
+//
+// typeAssert:
+//     Replaced with an icmp instruction so it can be directly used in a type
+//     switch. This is very easy to optimize for LLVM: it will often translate a
+//     type switch into a regular switch statement.
+//     When this type assert is not possible (the type is never used in an
+//     interface with makeInterface), this call is replaced with a constant
+//     false to optimize the type assert away completely.
+//
+// interfaceImplements:
+//     This call is translated into a call that checks whether the underlying
+//     type is one of the types implementing this interface.
+//     When there is only one type implementing this interface, the check is
+//     replaced with a simple icmp instruction, just like a type assert.
+//     When there is no type at all that implements this interface, it is
+//     replaced with a constant false to optimize it completely.
+//
+// interfaceMethod:
+//     This call is replaced with a call to a function that calls the
+//     appropriate method depending on the underlying type.
+//     When there is only one type implementing this interface, this call is
+//     translated into a direct call of that method.
+//     When there is no type implementing this interface, this code is marked
+//     unreachable as there is no way such an interface could be constructed.
+//
+// Note that this way of implementing interfaces is very different from how the
+// main Go compiler implements them. For more details on how the main Go
+// compiler does it: https://research.swtch.com/interfaces
+
+import (
+	"sort"
+	"strings"
+
+	"github.com/aykevl/go-llvm"
+)
+
+// signatureInfo is a Go signature of an interface method. It does not represent
+// any method in particular.
+type signatureInfo struct {
+	name       string
+	methods    []*methodInfo
+	interfaces []*interfaceInfo
+}
+
+// methodName takes a method name like "func String()" and returns only the
+// name, which is "String" in this case.
+func (s *signatureInfo) methodName() string {
+	if !strings.HasPrefix(s.name, "func ") {
+		panic("signature must start with \"func \"")
+	}
+	methodName := s.name[len("func "):]
+	if openingParen := strings.IndexByte(methodName, '('); openingParen < 0 {
+		panic("no opening paren in signature name")
+	} else {
+		return methodName[:openingParen]
+	}
+}
+
+// methodInfo describes a single method on a concrete type.
+type methodInfo struct {
+	*signatureInfo
+	function llvm.Value
+}
+
+// typeInfo describes a single concrete Go type, which can be a basic or a named
+// type. If it is a named type, it may have methods.
+type typeInfo struct {
+	name                string
+	typecode            llvm.Value
+	methodSet           llvm.Value
+	num                 uint64 // the type number after lowering
+	countMakeInterfaces int    // how often this type is used in an interface
+	countTypeAsserts    int    // how often a type assert happens on this method
+	methods             []*methodInfo
+}
+
+// getMethod looks up the method on this type with the given signature and
+// returns it. The method must exist on this type, otherwise getMethod will
+// panic.
+func (t *typeInfo) getMethod(signature *signatureInfo) *methodInfo {
+	for _, method := range t.methods {
+		if method.signatureInfo == signature {
+			return method
+		}
+	}
+	panic("could not find method")
+}
+
+// id returns the fully-qualified type name including import path, removing the
+// $type suffix.
+func (t *typeInfo) id() string {
+	if !strings.HasSuffix(t.name, "$type") {
+		panic("concrete type does not have $type suffix: " + t.name)
+	}
+	return t.name[:len(t.name)-len("$type")]
+}
+
+// typeInfoSlice implements sort.Slice, sorting the most commonly used types
+// first.
+type typeInfoSlice []*typeInfo
+
+func (t typeInfoSlice) Len() int { return len(t) }
+func (t typeInfoSlice) Less(i, j int) bool {
+	// Try to sort the most commonly used types first.
+	if t[i].countTypeAsserts != t[j].countTypeAsserts {
+		return t[i].countTypeAsserts < t[j].countTypeAsserts
+	}
+	if t[i].countMakeInterfaces != t[j].countMakeInterfaces {
+		return t[i].countMakeInterfaces < t[j].countMakeInterfaces
+	}
+	return t[i].name < t[j].name
+}
+func (t typeInfoSlice) Swap(i, j int) { t[i], t[j] = t[j], t[i] }
+
+// interfaceInfo keeps information about a Go interface type, including all
+// methods it has.
+type interfaceInfo struct {
+	name        string                        // name with $interface suffix
+	signatures  []*signatureInfo              // method set
+	types       typeInfoSlice                 // types this interface implements
+	assertFunc  llvm.Value                    // runtime.interfaceImplements replacement
+	methodFuncs map[*signatureInfo]llvm.Value // runtime.interfaceMethod replacements for each signature
+}
+
+// id removes the $interface suffix from the name and returns the clean
+// interface name including import path.
+func (itf *interfaceInfo) id() string {
+	if !strings.HasSuffix(itf.name, "$interface") {
+		panic("interface type does not have $interface suffix: " + itf.name)
+	}
+	return itf.name[:len(itf.name)-len("$interface")]
+}
+
+// lowerInterfacesPass keeps state related to the interface lowering pass. The
+// pass has been implemented as an object type because of its complexity, but
+// should be seen as a regular function call (see LowerInterfaces).
+type lowerInterfacesPass struct {
+	*Compiler
+	types      map[string]*typeInfo
+	signatures map[string]*signatureInfo
+	interfaces map[string]*interfaceInfo
+}
+
+// Lower all interface functions. They are emitted by the compiler as
+// higher-level intrinsics that need some lowering before LLVM can work on them.
+// This is done so that a few cleanup passes can run before assigning the final
+// type codes.
+func (c *Compiler) LowerInterfaces() {
+	p := &lowerInterfacesPass{
+		Compiler:   c,
+		types:      make(map[string]*typeInfo),
+		signatures: make(map[string]*signatureInfo),
+		interfaces: make(map[string]*interfaceInfo),
+	}
+	p.run()
+}
+
+// run runs the pass itself.
+func (p *lowerInterfacesPass) run() {
+	// Count per type how often it is put in an interface. Also, collect all
+	// methods this type has (if it is named).
+	makeInterface := p.mod.NamedFunction("runtime.makeInterface")
+	makeInterfaceUses := getUses(makeInterface)
+	for _, use := range makeInterfaceUses {
+		typecode := use.Operand(0)
+		name := typecode.Name()
+		if t, ok := p.types[name]; !ok {
+			// This is the first time this type has been seen, add it to the
+			// list of types.
+			t = p.addType(typecode)
+			p.addTypeMethods(t, use.Operand(1))
+		} else {
+			p.addTypeMethods(t, use.Operand(1))
+		}
+
+		// Count the number of MakeInterface instructions, for sorting the
+		// typecodes later.
+		p.types[name].countMakeInterfaces++
+	}
+
+	// Count per type how often it is type asserted on (e.g. in a switch
+	// statement).
+	typeAssert := p.mod.NamedFunction("runtime.typeAssert")
+	typeAssertUses := getUses(typeAssert)
+	for _, use := range typeAssertUses {
+		typecode := use.Operand(1)
+		name := typecode.Name()
+		if _, ok := p.types[name]; !ok {
+			p.addType(typecode)
+		}
+		p.types[name].countTypeAsserts++
+	}
+
+	// Find all interface method calls.
+	interfaceMethod := p.mod.NamedFunction("runtime.interfaceMethod")
+	interfaceMethodUses := getUses(interfaceMethod)
+	for _, use := range interfaceMethodUses {
+		methodSet := use.Operand(1).Operand(0)
+		name := methodSet.Name()
+		if _, ok := p.interfaces[name]; !ok {
+			p.addInterface(methodSet)
+		}
+	}
+
+	// Find all interface type asserts.
+	interfaceImplements := p.mod.NamedFunction("runtime.interfaceImplements")
+	interfaceImplementsUses := getUses(interfaceImplements)
+	for _, use := range interfaceImplementsUses {
+		methodSet := use.Operand(1).Operand(0)
+		name := methodSet.Name()
+		if _, ok := p.interfaces[name]; !ok {
+			p.addInterface(methodSet)
+		}
+	}
+
+	// Find all the interfaces that are implemented per type.
+	for _, t := range p.types {
+		// This type has no methods, so don't spend time calculating them.
+		if len(t.methods) == 0 {
+			continue
+		}
+
+		// Pre-calculate a set of signatures that this type has, for easy
+		// lookup/check.
+		typeSignatureSet := make(map[*signatureInfo]struct{})
+		for _, method := range t.methods {
+			typeSignatureSet[method.signatureInfo] = struct{}{}
+		}
+
+		// A set of interfaces, mapped from the name to the info.
+		// When the name maps to a nil pointer, one of the methods of this type
+		// exists in the given interface but not all of them so this type
+		// doesn't implement the interface.
+		satisfiesInterfaces := make(map[string]*interfaceInfo)
+
+		for _, method := range t.methods {
+			for _, itf := range method.interfaces {
+				if _, ok := satisfiesInterfaces[itf.name]; ok {
+					// interface already checked with a different method
+					continue
+				}
+				// check whether this interface satisfies this type
+				satisfies := true
+				for _, itfSignature := range itf.signatures {
+					if _, ok := typeSignatureSet[itfSignature]; !ok {
+						satisfiesInterfaces[itf.name] = nil // does not satisfy
+						satisfies = false
+						break
+					}
+				}
+				if !satisfies {
+					continue
+				}
+				satisfiesInterfaces[itf.name] = itf
+			}
+		}
+
+		// Add this type to all interfaces that satisfy this type.
+		for _, itf := range satisfiesInterfaces {
+			if itf == nil {
+				// Interface does not implement this type, but one of the
+				// methods on this type also exists on the interface.
+				continue
+			}
+			itf.types = append(itf.types, t)
+		}
+	}
+
+	// Sort all types added to the interfaces, to check for more common types
+	// first.
+	for _, itf := range p.interfaces {
+		sort.Sort(itf.types)
+	}
+
+	// Replace all interface methods with their uses, if possible.
+	for _, use := range interfaceMethodUses {
+		typecode := use.Operand(0)
+		signature := p.signatures[use.Operand(2).Name()]
+
+		// If the interface was created in the same function, we can insert a
+		// direct call. This may not happen often but it is an easy
+		// optimization so let's do it anyway.
+		if !typecode.IsACallInst().IsNil() && typecode.CalledValue() == makeInterface {
+			name := typecode.Operand(0).Name()
+			typ := p.types[name]
+			p.replaceInvokeWithCall(use, typ, signature)
+			continue
+		}
+
+		methodSet := use.Operand(1).Operand(0) // global variable
+		itf := p.interfaces[methodSet.Name()]
+		if len(itf.types) == 0 {
+			// This method call is impossible: no type implements this
+			// interface. In fact, the previous type assert that got this
+			// interface value should already have returned false.
+			// Replace the function pointer with undef (which will then be
+			// called), indicating to the optimizer this code is unreachable.
+			use.ReplaceAllUsesWith(llvm.Undef(p.i8ptrType))
+			use.EraseFromParentAsInstruction()
+		} else if len(itf.types) == 1 {
+			// There is only one implementation of the given type.
+			// Call that function directly.
+			p.replaceInvokeWithCall(use, itf.types[0], signature)
+		} else {
+			// There are multiple types implementing this interface, thus there
+			// are multiple possible functions to call. Delegate calling the
+			// right function to a special wrapper function.
+			bitcasts := getUses(use)
+			if len(bitcasts) != 1 || bitcasts[0].IsABitCastInst().IsNil() {
+				panic("expected exactly one bitcast use of runtime.interfaceMethod")
+			}
+			bitcast := bitcasts[0]
+			calls := getUses(bitcast)
+			if len(calls) != 1 || calls[0].IsACallInst().IsNil() {
+				panic("expected exactly one call use of runtime.interfaceMethod")
+			}
+			call := calls[0]
+
+			// Set up parameters for the call. First copy the regular params...
+			params := make([]llvm.Value, call.OperandsCount())
+			paramTypes := make([]llvm.Type, len(params))
+			for i := 0; i < len(params)-1; i++ {
+				params[i] = call.Operand(i)
+				paramTypes[i] = params[i].Type()
+			}
+			// then add the typecode to the end of the list.
+			params[len(params)-1] = typecode
+			paramTypes[len(params)-1] = p.uintptrType
+
+			// Create a function that redirects the call to the destination
+			// call, after selecting the right concrete type.
+			redirector := p.getInterfaceMethodFunc(itf, signature, call.Type(), paramTypes)
+
+			// Replace the old lookup/bitcast/call with the new call.
+			p.builder.SetInsertPointBefore(call)
+			retval := p.builder.CreateCall(redirector, params, "")
+			if retval.Type().TypeKind() != llvm.VoidTypeKind {
+				call.ReplaceAllUsesWith(retval)
+			}
+			call.EraseFromParentAsInstruction()
+			bitcast.EraseFromParentAsInstruction()
+			use.EraseFromParentAsInstruction()
+		}
+	}
+
+	// Replace all typeasserts on interface types with matches on their concrete
+	// types, if possible.
+	for _, use := range interfaceImplementsUses {
+		actualType := use.Operand(0)
+		if !actualType.IsACallInst().IsNil() && actualType.CalledValue() == makeInterface {
+			// Type assert is in the same function that creates the interface
+			// value. This means the underlying type is already known so match
+			// on that.
+			// This may not happen often but it is an easy optimization.
+			name := actualType.Operand(0).Name()
+			typ := p.types[name]
+			p.builder.SetInsertPointBefore(use)
+			assertedType := p.builder.CreatePtrToInt(typ.typecode, p.uintptrType, "typeassert.typecode")
+			commaOk := p.builder.CreateICmp(llvm.IntEQ, assertedType, actualType, "typeassert.ok")
+			use.ReplaceAllUsesWith(commaOk)
+			use.EraseFromParentAsInstruction()
+			continue
+		}
+
+		methodSet := use.Operand(1).Operand(0) // global variable
+		itf := p.interfaces[methodSet.Name()]
+		if len(itf.types) == 0 {
+			// There are no types implementing this interface, so this assert
+			// can never succeed.
+			// Signal this to the optimizer by branching on constant false. It
+			// should remove the "then" block.
+			use.ReplaceAllUsesWith(llvm.ConstInt(p.ctx.Int1Type(), 0, false))
+			use.EraseFromParentAsInstruction()
+		} else if len(itf.types) == 1 {
+			// There is only one type implementing this interface.
+			// Transform this interface assert into comparison against a
+			// constant.
+			p.builder.SetInsertPointBefore(use)
+			assertedType := p.builder.CreatePtrToInt(itf.types[0].typecode, p.uintptrType, "typeassert.typecode")
+			commaOk := p.builder.CreateICmp(llvm.IntEQ, assertedType, actualType, "typeassert.ok")
+			use.ReplaceAllUsesWith(commaOk)
+			use.EraseFromParentAsInstruction()
+		} else {
+			// There are multiple possible types implementing this interface.
+			// Create a function that does a type switch on all available types
+			// that implement this interface.
+			fn := p.getInterfaceImplementsFunc(itf)
+			p.builder.SetInsertPointBefore(use)
+			commaOk := p.builder.CreateCall(fn, []llvm.Value{actualType}, "typeassert.ok")
+			use.ReplaceAllUsesWith(commaOk)
+			use.EraseFromParentAsInstruction()
+		}
+	}
+
+	// Make a slice of types sorted by frequency of use.
+	typeSlice := make(typeInfoSlice, 0, len(p.types))
+	for _, t := range p.types {
+		typeSlice = append(typeSlice, t)
+	}
+	sort.Sort(typeSlice)
+
+	// A type code must fit in 16 bits.
+	if len(typeSlice) >= 1<<16 {
+		panic("typecode does not fit in a uint16: too many types in this program")
+	}
+
+	// Assign a type code for each type.
+	for i, t := range typeSlice {
+		t.num = uint64(i + 1)
+	}
+
+	// Replace each call to runtime.makeInterface with the constant type code.
+	for _, use := range makeInterfaceUses {
+		global := use.Operand(0)
+		t := p.types[global.Name()]
+		use.ReplaceAllUsesWith(llvm.ConstPtrToInt(t.typecode, p.uintptrType))
+		use.EraseFromParentAsInstruction()
+	}
+
+	// Replace each type assert with an actual type comparison or (if the type
+	// assert is impossible) the constant false.
+	for _, use := range typeAssertUses {
+		actualType := use.Operand(0)
+		assertedTypeGlobal := use.Operand(1)
+		t := p.types[assertedTypeGlobal.Name()]
+		var commaOk llvm.Value
+		if t.countMakeInterfaces == 0 {
+			// impossible type assert: optimize accordingly
+			commaOk = llvm.ConstInt(llvm.Int1Type(), 0, false)
+		} else {
+			// regular type assert
+			p.builder.SetInsertPointBefore(use)
+			commaOk = p.builder.CreateICmp(llvm.IntEQ, llvm.ConstPtrToInt(assertedTypeGlobal, p.uintptrType), actualType, "typeassert.ok")
+		}
+		use.ReplaceAllUsesWith(commaOk)
+		use.EraseFromParentAsInstruction()
+	}
+
+	// Fill in each helper function for type asserts on interfaces
+	// (interface-to-interface matches).
+	for _, itf := range p.interfaces {
+		if !itf.assertFunc.IsNil() {
+			p.createInterfaceImplementsFunc(itf)
+		}
+		for signature := range itf.methodFuncs {
+			p.createInterfaceMethodFunc(itf, signature)
+		}
+	}
+
+	// Replace all ptrtoint typecode placeholders with their final type code
+	// numbers.
+	for _, typ := range p.types {
+		for _, use := range getUses(typ.typecode) {
+			if use.IsConstant() && use.Opcode() == llvm.PtrToInt {
+				use.ReplaceAllUsesWith(llvm.ConstInt(p.uintptrType, typ.num, false))
+			}
+		}
+	}
+
+	// Remove method sets of types. Unnecessary, but cleans up the IR for
+	// inspection.
+	for _, typ := range p.types {
+		if !typ.methodSet.IsNil() {
+			typ.methodSet.EraseFromParentAsGlobal()
+			typ.methodSet = llvm.Value{}
+		}
+	}
+}
+
+// addType retrieves Go type information based on a i16 global variable.
+// Only the name of the i16 is relevant, the object itself is const-propagated
+// and discared afterwards.
+func (p *lowerInterfacesPass) addType(typecode llvm.Value) *typeInfo {
+	name := typecode.Name()
+	t := &typeInfo{
+		name:     name,
+		typecode: typecode,
+	}
+	p.types[name] = t
+	return t
+}
+
+// addTypeMethods reads the method set of the given type info struct. It
+// retrieves the signatures and the references to the method functions
+// themselves for later type<->interface matching.
+func (p *lowerInterfacesPass) addTypeMethods(t *typeInfo, methodSet llvm.Value) {
+	if !t.methodSet.IsNil() || methodSet.IsNull() {
+		// no methods or methods already read
+		return
+	}
+	methodSet = methodSet.Operand(0) // get global from GEP
+
+	// This type has methods, collect all methods of this type.
+	t.methodSet = methodSet
+	set := methodSet.Initializer() // get value from global
+	for i := 0; i < set.Type().ArrayLength(); i++ {
+		methodData := llvm.ConstExtractValue(set, []uint32{uint32(i)})
+		signatureName := llvm.ConstExtractValue(methodData, []uint32{0}).Name()
+		function := llvm.ConstExtractValue(methodData, []uint32{1}).Operand(0)
+		signature := p.getSignature(signatureName)
+		method := &methodInfo{
+			function:      function,
+			signatureInfo: signature,
+		}
+		signature.methods = append(signature.methods, method)
+		t.methods = append(t.methods, method)
+	}
+}
+
+// addInterface reads information about an interface, which is the
+// fully-qualified name and the signatures of all methods it has.
+func (p *lowerInterfacesPass) addInterface(methodSet llvm.Value) {
+	name := methodSet.Name()
+	t := &interfaceInfo{
+		name: name,
+	}
+	p.interfaces[name] = t
+	methodSet = methodSet.Initializer() // get global value from getelementptr
+	for i := 0; i < methodSet.Type().ArrayLength(); i++ {
+		signatureName := llvm.ConstExtractValue(methodSet, []uint32{uint32(i)}).Name()
+		signature := p.getSignature(signatureName)
+		signature.interfaces = append(signature.interfaces, t)
+		t.signatures = append(t.signatures, signature)
+	}
+}
+
+// getSignature returns a new *signatureInfo, creating it if it doesn't already
+// exist.
+func (p *lowerInterfacesPass) getSignature(name string) *signatureInfo {
+	if _, ok := p.signatures[name]; !ok {
+		p.signatures[name] = &signatureInfo{
+			name: name,
+		}
+	}
+	return p.signatures[name]
+}
+
+// replaceInvokeWithCall replaces a runtime.interfaceMethod + bitcast with a
+// concrete method. This can be done when only one type implements the
+// interface.
+func (p *lowerInterfacesPass) replaceInvokeWithCall(use llvm.Value, typ *typeInfo, signature *signatureInfo) {
+	bitcasts := getUses(use)
+	if len(bitcasts) != 1 || bitcasts[0].IsABitCastInst().IsNil() {
+		panic("expected exactly one bitcast use of runtime.interfaceMethod")
+	}
+	bitcast := bitcasts[0]
+	function := typ.getMethod(signature).function
+	if bitcast.Type() != function.Type() {
+		p.builder.SetInsertPointBefore(use)
+		function = p.builder.CreateBitCast(function, bitcast.Type(), "")
+	}
+	bitcast.ReplaceAllUsesWith(function)
+	bitcast.EraseFromParentAsInstruction()
+	use.EraseFromParentAsInstruction()
+}
+
+// getInterfaceImplementsFunc returns a function that checks whether a given
+// interface type implements a given interface, by checking all possible types
+// that implement this interface.
+func (p *lowerInterfacesPass) getInterfaceImplementsFunc(itf *interfaceInfo) llvm.Value {
+	if !itf.assertFunc.IsNil() {
+		return itf.assertFunc
+	}
+
+	// Create the function and function signature.
+	// TODO: debug info
+	fnName := itf.id() + "$typeassert"
+	fnType := llvm.FunctionType(p.ctx.Int1Type(), []llvm.Type{p.uintptrType}, false)
+	itf.assertFunc = llvm.AddFunction(p.mod, fnName, fnType)
+	itf.assertFunc.Param(0).SetName("actualType")
+
+	// Type asserts will be made for each type, so increment the counter for
+	// those.
+	for _, typ := range itf.types {
+		typ.countTypeAsserts++
+	}
+
+	return itf.assertFunc
+}
+
+// createInterfaceImplementsFunc finishes the work of
+// getInterfaceImplementsFunc, because it needs to run after types have a type
+// code assigned.
+//
+// The type match is implemented using a big type switch over all possible
+// types.
+func (p *lowerInterfacesPass) createInterfaceImplementsFunc(itf *interfaceInfo) {
+	fn := itf.assertFunc
+	fn.SetLinkage(llvm.InternalLinkage)
+	fn.SetUnnamedAddr(true)
+
+	// TODO: debug info
+
+	// Create all used basic blocks.
+	entry := llvm.AddBasicBlock(fn, "entry")
+	thenBlock := llvm.AddBasicBlock(fn, "then")
+	elseBlock := llvm.AddBasicBlock(fn, "else")
+
+	// Add all possible types as cases.
+	p.builder.SetInsertPointAtEnd(entry)
+	actualType := fn.Param(0)
+	sw := p.builder.CreateSwitch(actualType, elseBlock, len(itf.types))
+	for _, typ := range itf.types {
+		sw.AddCase(llvm.ConstInt(p.uintptrType, typ.num, false), thenBlock)
+	}
+
+	// Fill 'then' block (type assert was successful).
+	p.builder.SetInsertPointAtEnd(thenBlock)
+	p.builder.CreateRet(llvm.ConstInt(p.ctx.Int1Type(), 1, false))
+
+	// Fill 'else' block (type asserted failed).
+	p.builder.SetInsertPointAtEnd(elseBlock)
+	p.builder.CreateRet(llvm.ConstInt(p.ctx.Int1Type(), 0, false))
+}
+
+// getInterfaceMethodFunc return a function that returns a function pointer for
+// calling a method on an interface. It only declares the function,
+// createInterfaceMethodFunc actually defines the function.
+func (p *lowerInterfacesPass) getInterfaceMethodFunc(itf *interfaceInfo, signature *signatureInfo, returnType llvm.Type, params []llvm.Type) llvm.Value {
+	if fn, ok := itf.methodFuncs[signature]; ok {
+		// This function has already been created.
+		return fn
+	}
+	if itf.methodFuncs == nil {
+		// initialize the above map
+		itf.methodFuncs = make(map[*signatureInfo]llvm.Value)
+	}
+
+	// Construct the function name, which is of the form:
+	//     (main.Stringer).String
+	fnName := "(" + itf.id() + ")." + signature.methodName()
+	fnType := llvm.FunctionType(returnType, params, false)
+	fn := llvm.AddFunction(p.mod, fnName, fnType)
+	fn.LastParam().SetName("actualType")
+	itf.methodFuncs[signature] = fn
+	return fn
+}
+
+// createInterfaceMethodFunc finishes the work of getInterfaceMethodFunc,
+// because it needs to run after type codes have been assigned to concrete
+// types.
+//
+// Matching the actual type is implemented using a big type switch over all
+// possible types.
+func (p *lowerInterfacesPass) createInterfaceMethodFunc(itf *interfaceInfo, signature *signatureInfo) {
+	fn := itf.methodFuncs[signature]
+	fn.SetLinkage(llvm.InternalLinkage)
+	fn.SetUnnamedAddr(true)
+
+	// TODO: debug info
+
+	// Create entry block.
+	entry := llvm.AddBasicBlock(fn, "entry")
+
+	// Create default block and make it unreachable (which it is, because all
+	// possible types are checked).
+	defaultBlock := llvm.AddBasicBlock(fn, "default")
+	p.builder.SetInsertPointAtEnd(defaultBlock)
+	p.builder.CreateUnreachable()
+
+	// Create type switch in entry block.
+	p.builder.SetInsertPointAtEnd(entry)
+	actualType := fn.LastParam()
+	sw := p.builder.CreateSwitch(actualType, defaultBlock, len(itf.types))
+
+	// Collect the params that will be passed to the functions to call.
+	// These params exclude the receiver (which may actually consist of multiple
+	// parts).
+	params := make([]llvm.Value, fn.ParamsCount()-2)
+	for i := range params {
+		params[i] = fn.Param(i + 1)
+	}
+
+	// Define all possible functions that can be called.
+	for _, typ := range itf.types {
+		bb := llvm.AddBasicBlock(fn, typ.id())
+		sw.AddCase(llvm.ConstInt(p.uintptrType, typ.num, false), bb)
+
+		// The function we will redirect to when the interface has this type.
+		function := typ.getMethod(signature).function
+
+		p.builder.SetInsertPointAtEnd(bb)
+		receiver := fn.FirstParam()
+		if receiver.Type() != function.FirstParam().Type() {
+			// When the receiver is a pointer, it is not wrapped. This means the
+			// i8* has to be cast to the correct pointer type of the target
+			// function.
+			receiver = p.builder.CreateBitCast(receiver, function.FirstParam().Type(), "")
+		}
+		retval := p.builder.CreateCall(function, append([]llvm.Value{receiver}, params...), "")
+		if retval.Type().TypeKind() == llvm.VoidTypeKind {
+			p.builder.CreateRetVoid()
+		} else {
+			p.builder.CreateRet(retval)
+		}
+	}
+}