compiler, runtime: make slice lookup panics recoverable

This gets the math/bits and go/constant package tests to pass.

Unfortunately, this also has a binary size impact of around 150-200
bytes in many cases. I'm a bit on the edge on whether this is worth it,
since it's mostly used for getting package tests to work. But at the
same time, having working package tests is very valuable.

.circleci/config.yml

@@ -73,6 +73,14 @@ commands:
             - go-cache-v4-{{ checksum "go.mod" }}
       - llvm-source-linux
       - run: go install -tags=llvm<<parameters.llvm>> .
+      - restore_cache:
+          keys:
+            - wasi-libc-sysroot-systemclang-v7
+      - run: make wasi-libc
+      - save_cache:
+          key: wasi-libc-sysroot-systemclang-v7
+          paths:
+            - lib/wasi-libc/sysroot
       - when:
           condition: <<parameters.fmt-check>>
           steps:
@@ -92,28 +100,28 @@ commands:
             - /go/pkg/mod
 
 jobs:
-  test-oldest:
+  test-llvm15-go119:
-    # This tests our lowest supported versions of Go and LLVM, to make sure at
-    # least the smoke tests still pass.
     docker:
-      - image: golang:1.23-bullseye
+      - image: golang:1.19-bullseye
     steps:
       - test-linux:
           llvm: "15"
+          # "make lint" fails before go 1.21 because internal/tools/go.mod specifies packages that require go 1.21
+          fmt-check: false
     resource_class: large
-  test-newest:
+  test-llvm19-go124:
-    # This tests the latest supported LLVM version when linking against system
-    # libraries.
     docker:
-      - image: golang:1.26-bookworm
+      - image: golang:1.24-bullseye
     steps:
       - test-linux:
-          llvm: "20"
+          llvm: "19"
     resource_class: large
 
 workflows:
   test-all:
     jobs:
-      - test-oldest
+      # This tests our lowest supported versions of Go and LLVM, to make sure at
-      # disable this test, since CircleCI seems unable to download due to rate-limits on Dockerhub.
+      # least the smoke tests still pass.
-      # - test-newest
+      - test-llvm15-go119
+      # This tests LLVM 19 support when linking against system libraries.
+      - test-llvm19-go124

.github/workflows/build-macos.yml

@@ -16,37 +16,36 @@ jobs:
     name: build-macos
     strategy:
       matrix:
-        # macos-14: arm64 (oldest supported version as of 18-11-2025)
+        # macos-13: amd64 (oldest supported version as of 18-10-2024)
-        # macos-15-intel: amd64 (last intel version to be supported by github runners)
+        # macos-14: arm64 (oldest arm64 version)
-        # See https://github.com/actions/runner-images/issues/13046
+        os: [macos-13, macos-14]
-        os: [macos-14, macos-15-intel]
         include:
+          - os: macos-13
+            goarch: amd64
           - os: macos-14
             goarch: arm64
-          - os: macos-15-intel
-            goarch: amd64
     runs-on: ${{ matrix.os }}
     steps:
       - name: Install Dependencies
         run: |
           HOMEBREW_NO_AUTO_UPDATE=1 brew install qemu binaryen
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           submodules: true
       - name: Extract TinyGo version
         id: version
         run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.26.2'
+          go-version: '1.24'
           cache: true
       - name: Restore LLVM source cache
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-20-${{ matrix.os }}-v1
+          key: llvm-source-19-${{ matrix.os }}-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -57,7 +56,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save LLVM source cache
-        uses: actions/cache/save@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
@@ -68,10 +67,10 @@ jobs:
             llvm-project/lld/include
             llvm-project/llvm/include
       - name: Restore LLVM build cache
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-20-${{ matrix.os }}-v2
+          key: llvm-build-19-${{ matrix.os }}-v1
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -80,20 +79,29 @@ jobs:
           rm -rf llvm-project
           make llvm-source
           # install dependencies
-          HOMEBREW_NO_AUTO_UPDATE=1 brew install ninja
+          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@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
           path: llvm-build
+      - name: Cache wasi-libc sysroot
+        uses: actions/cache@v4
+        id: cache-wasi-libc
+        with:
+          key: wasi-libc-sysroot-${{ matrix.os }}-v1
+          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
-        run: make test GOTESTFLAGS="-only-current-os"
+        run: make test GOTESTFLAGS="-short"
       - name: Build TinyGo release tarball
         run: make release -j3
       - name: Test stdlib packages
@@ -101,11 +109,16 @@ jobs:
       - name: Make release artifact
         run: cp -p build/release.tar.gz build/tinygo${{ steps.version.outputs.version }}.darwin-${{ matrix.goarch }}.tar.gz
       - name: Publish release artifact
-        uses: actions/upload-artifact@v7
+        # 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@v4
         with:
           name: darwin-${{ matrix.goarch }}-double-zipped-${{ steps.version.outputs.version }}
           path: build/tinygo${{ steps.version.outputs.version }}.darwin-${{ matrix.goarch }}.tar.gz
-          archive: false
       - name: Smoke tests
         run: make smoketest TINYGO=$(PWD)/build/tinygo
   test-macos-homebrew:
@@ -113,10 +126,10 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        version: [16, 17, 18, 19, 20]
+        version: [16, 17, 18, 19]
     steps:
       - name: Set up Homebrew
-        uses: Homebrew/actions/setup-homebrew@main
+        uses: Homebrew/actions/setup-homebrew@master
       - name: Fix Python symlinks
         run: |
           # Github runners have broken symlinks, so relink
@@ -125,21 +138,20 @@ jobs:
       - name: Install LLVM
         run: |
           brew install llvm@${{ matrix.version }}
-          brew link llvm@${{ matrix.version }}
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.26.2'
+          go-version: '1.24'
           cache: true
       - name: Build TinyGo (LLVM ${{ matrix.version }})
         run: go install -tags=llvm${{ matrix.version }}
       - name: Check binary
         run: tinygo version
       - name: Build TinyGo (default LLVM)
-        if: matrix.version == 20
+        if: matrix.version == 19
         run: go install
       - name: Check binary
-        if: matrix.version == 20
+        if: matrix.version == 19
         run: tinygo version

.github/workflows/docker.yml

@@ -31,14 +31,14 @@ jobs:
           sudo rm -rf /usr/local/share/boost
           df -h
       - name: Check out the repo
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           submodules: recursive
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v4
+        uses: docker/setup-buildx-action@v3
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v6
+        uses: docker/metadata-action@v5
         with:
           images: |
             tinygo/tinygo-dev
@@ -47,18 +47,18 @@ jobs:
             type=sha,format=long
             type=raw,value=latest
       - name: Log in to Docker Hub
-        uses: docker/login-action@v4
+        uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKER_HUB_USERNAME }}
           password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
       - name: Log in to Github Container Registry
-        uses: docker/login-action@v4
+        uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push
-        uses: docker/build-push-action@v7
+        uses: docker/build-push-action@v5
         with:
           context: .
           push: true
@@ -66,3 +66,45 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           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

@@ -18,37 +18,37 @@ jobs:
     # statically linked binary.
     runs-on: ubuntu-latest
     container:
-      image: golang:1.26-alpine
+      image: golang:1.24-alpine
     outputs:
       version: ${{ steps.version.outputs.version }}
     steps:
       - name: Install apk dependencies
-        # tar: needed for actions/cache@v5
+        # tar: needed for actions/cache@v4
         # git+openssh: needed for checkout (I think?)
         # ruby: needed to install fpm
-        run: apk add tar git openssh make g++ ruby-dev mold
+        run: apk add tar git openssh make g++ ruby-dev
       - name: Work around CVE-2022-24765
         # We're not on a multi-user machine, so this is safe.
         run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           submodules: true
       - name: Extract TinyGo version
         id: version
         run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
       - name: Cache Go
-        uses: actions/cache@v5
+        uses: actions/cache@v4
         with:
-          key: go-cache-linux-alpine-v2-${{ hashFiles('go.mod') }}
+          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@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-20-linux-alpine-v2
+          key: llvm-source-19-linux-alpine-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -59,7 +59,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save LLVM source cache
-        uses: actions/cache/save@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
@@ -70,10 +70,10 @@ jobs:
             llvm-project/lld/include
             llvm-project/llvm/include
       - name: Restore LLVM build cache
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-20-linux-alpine-v2
+          key: llvm-build-19-linux-alpine-v1
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -88,22 +88,31 @@ jobs:
           # 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@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
           path: llvm-build
       - name: Cache Binaryen
-        uses: actions/cache@v5
+        uses: actions/cache@v4
         id: cache-binaryen
         with:
-          key: binaryen-linux-alpine-v2
+          key: binaryen-linux-alpine-v1
           path: build/wasm-opt
       - name: Build Binaryen
         if: steps.cache-binaryen.outputs.cache-hit != 'true'
         run: |
           apk add cmake samurai python3
           make binaryen STATIC=1
+      - name: Cache wasi-libc
+        uses: actions/cache@v4
+        id: cache-wasi-libc
+        with:
+          key: wasi-libc-sysroot-linux-alpine-v2
+          path: lib/wasi-libc/sysroot
+      - name: Build wasi-libc
+        if: steps.cache-wasi-libc.outputs.cache-hit != 'true'
+        run: make wasi-libc
       - name: Install fpm
         run: |
           gem install --version 4.0.7 public_suffix
@@ -118,31 +127,26 @@ jobs:
           make release deb -j3 STATIC=1
           cp -p build/release.tar.gz /tmp/tinygo${{ steps.version.outputs.version }}.linux-amd64.tar.gz
           cp -p build/release.deb    /tmp/tinygo_${{ steps.version.outputs.version }}_amd64.deb
-      - name: "Publish release artifact: tarball"
+      - name: Publish release artifact
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v4
         with:
-          name: tinygo${{ steps.version.outputs.version }}.linux-amd64.tar.gz
+          name: linux-amd64-double-zipped-${{ steps.version.outputs.version }}
-          path: /tmp/tinygo${{ steps.version.outputs.version }}.linux-amd64.tar.gz
+          path: |
-          archive: false
+            /tmp/tinygo${{ steps.version.outputs.version }}.linux-amd64.tar.gz
-      - name: "Publish release artifact: Debian package"
+            /tmp/tinygo_${{ steps.version.outputs.version }}_amd64.deb
-        uses: actions/upload-artifact@v7
-        with:
-          name: tinygo_${{ steps.version.outputs.version }}_amd64.deb
-          path: /tmp/tinygo_${{ steps.version.outputs.version }}_amd64.deb
-          archive: false
   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@v6
+        uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.26.2'
+          go-version: '1.24'
           cache: true
       - name: Install wasmtime
         uses: bytecodealliance/actions/wasmtime/setup@v1
@@ -151,9 +155,9 @@ jobs:
       - name: Install wasm-tools
         uses: bytecodealliance/actions/wasm-tools/setup@v1
       - name: Download release artifact
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@v4
         with:
-          name: tinygo${{ needs.build-linux.outputs.version }}.linux-amd64.tar.gz
+          name: linux-amd64-double-zipped-${{ needs.build-linux.outputs.version }}
       - name: Extract release tarball
         run: |
           mkdir -p ~/lib
@@ -161,7 +165,6 @@ jobs:
           ln -s ~/lib/tinygo/bin/tinygo ~/go/bin/tinygo
       - run: make tinygo-test-wasip1-fast
       - run: make tinygo-test-wasip2-fast
-      - run: make tinygo-test-wasm
       - run: make smoketest
   assert-test-linux:
     # Run all tests that can run on Linux, with LLVM assertions enabled to catch
@@ -169,7 +172,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install apt dependencies
@@ -184,12 +187,12 @@ jobs:
               simavr \
               ninja-build
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.26.2'
+          go-version: '1.24'
           cache: true
       - name: Install Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v4
         with:
           node-version: '18'
       - name: Install wasmtime
@@ -199,10 +202,10 @@ jobs:
       - name: Setup `wasm-tools`
         uses: bytecodealliance/actions/wasm-tools/setup@v1
       - name: Restore LLVM source cache
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-20-linux-asserts-v1
+          key: llvm-source-19-linux-asserts-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -213,7 +216,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save LLVM source cache
-        uses: actions/cache/save@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
@@ -224,10 +227,10 @@ jobs:
             llvm-project/lld/include
             llvm-project/llvm/include
       - name: Restore LLVM build cache
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-20-linux-asserts-v1
+          key: llvm-build-19-linux-asserts-v1
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -240,13 +243,13 @@ jobs:
           # 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@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
           path: llvm-build
       - name: Cache Binaryen
-        uses: actions/cache@v5
+        uses: actions/cache@v4
         id: cache-binaryen
         with:
           key: binaryen-linux-asserts-v1
@@ -254,6 +257,15 @@ jobs:
       - name: Build Binaryen
         if: steps.cache-binaryen.outputs.cache-hit != 'true'
         run: make binaryen
+      - name: Cache wasi-libc
+        uses: actions/cache@v4
+        id: cache-wasi-libc
+        with:
+          key: wasi-libc-sysroot-linux-asserts-v6
+          path: lib/wasi-libc/sysroot
+      - name: Build wasi-libc
+        if: steps.cache-wasi-libc.outputs.cache-hit != 'true'
+        run: make wasi-libc
       - run: make gen-device -j4
       - name: Test TinyGo
         run: make ASSERT=1 test
@@ -265,7 +277,7 @@ jobs:
         run: make tinygo-test
       - run: make smoketest
       - run: make wasmtest
-      - run: make tinygo-test-baremetal
+      - run: make tinygo-baremetal
   build-linux-cross:
     # Build ARM Linux binaries, ready for release.
     # This intentionally uses an older Linux image, so that we compile against
@@ -289,7 +301,7 @@ jobs:
     needs: build-linux
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
       - name: Get TinyGo version
         id: version
         run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
@@ -301,15 +313,15 @@ jobs:
               g++-${{ matrix.toolchain }} \
               libc6-dev-${{ matrix.libc }}-cross
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.26.2'
+          go-version: '1.24'
           cache: true
       - name: Restore LLVM source cache
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-20-linux-v1
+          key: llvm-source-19-linux-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -320,7 +332,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save LLVM source cache
-        uses: actions/cache/save@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
@@ -331,10 +343,10 @@ jobs:
             llvm-project/lld/include
             llvm-project/llvm/include
       - name: Restore LLVM build cache
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-20-linux-${{ matrix.goarch }}-v1
+          key: llvm-build-19-linux-${{ matrix.goarch }}-v3
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -349,13 +361,13 @@ jobs:
           # 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@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
           path: llvm-build
       - name: Cache Binaryen
-        uses: actions/cache@v5
+        uses: actions/cache@v4
         id: cache-binaryen
         with:
           key: binaryen-linux-${{ matrix.goarch }}-v4
@@ -375,9 +387,9 @@ jobs:
         run: |
           make CROSS=${{ matrix.toolchain }}
       - name: Download amd64 release
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@v4
         with:
-          name: tinygo${{ needs.build-linux.outputs.version }}.linux-amd64.tar.gz
+          name: linux-amd64-double-zipped-${{ needs.build-linux.outputs.version }}
       - name: Extract amd64 release
         run: |
           mkdir -p build/release
@@ -389,17 +401,12 @@ jobs:
       - name: Create ${{ matrix.goarch }} release
         run: |
           make release deb RELEASEONLY=1 DEB_ARCH=${{ matrix.libc }}
-          cp -p build/release.tar.gz /tmp/tinygo${{ needs.build-linux.outputs.version }}.linux-${{ matrix.goarch }}.tar.gz
+          cp -p build/release.tar.gz /tmp/tinygo${{ steps.version.outputs.version }}.linux-${{ matrix.goarch }}.tar.gz
-          cp -p build/release.deb    /tmp/tinygo_${{ needs.build-linux.outputs.version }}_${{ matrix.libc }}.deb
+          cp -p build/release.deb    /tmp/tinygo_${{ steps.version.outputs.version }}_${{ matrix.libc }}.deb
-      - name: "Publish release artifact: tarball"
+      - name: Publish release artifact
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v4
         with:
-          name: linux-${{ matrix.goarch }}-double-zipped-${{ needs.build-linux.outputs.version }}
+          name: linux-${{ matrix.goarch }}-double-zipped-${{ steps.version.outputs.version }}
-          path: /tmp/tinygo${{ needs.build-linux.outputs.version }}.linux-${{ matrix.goarch }}.tar.gz
+          path: |
-          archive: false
+            /tmp/tinygo${{ steps.version.outputs.version }}.linux-${{ matrix.goarch }}.tar.gz
-      - name: "Publish release artifact: Debian package"
+            /tmp/tinygo_${{ steps.version.outputs.version }}_${{ matrix.libc }}.deb
-        uses: actions/upload-artifact@v7
-        with:
-          name: linux-${{ matrix.goarch }}-double-zipped-${{ needs.build-linux.outputs.version }}
-          path: /tmp/tinygo_${{ needs.build-linux.outputs.version }}_${{ matrix.libc }}.deb
-          archive: false

.github/workflows/llvm.yml

@@ -25,18 +25,18 @@ jobs:
       contents: read
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           submodules: recursive
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v4
+        uses: docker/setup-buildx-action@v3
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v6
+        uses: docker/metadata-action@v5
         with:
           images: |
-            tinygo/llvm-20
+            tinygo/llvm-19
-            ghcr.io/${{ github.repository_owner }}/llvm-20
+            ghcr.io/${{ github.repository_owner }}/llvm-19
           tags: |
             type=sha,format=long
             type=raw,value=latest
@@ -46,13 +46,13 @@ jobs:
           username: ${{ secrets.DOCKER_HUB_USERNAME }}
           password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
       - name: Log in to Github Container Registry
-        uses: docker/login-action@v4
+        uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push
-        uses: docker/build-push-action@v7
+        uses: docker/build-push-action@v5
         with:
           target: tinygo-llvm-build
           context: .

.github/workflows/nix.yml

@@ -21,28 +21,28 @@ jobs:
         # See: https://github.com/tinygo-org/tinygo/pull/4516#issuecomment-2416363668
         run: sudo apt-get remove llvm-18
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
-      - name: Pull musl, bdwgc
+      - name: Pull musl
         run: |
-            git submodule update --init lib/musl lib/bdwgc
+            git submodule update --init lib/musl
       - name: Restore LLVM source cache
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-20-linux-nix-v1
+          key: llvm-source-19-linux-nix-v1
           path: |
             llvm-project/compiler-rt
       - 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@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
           path: |
             llvm-project/compiler-rt
-      - uses: cachix/install-nix-action@v31
+      - uses: cachix/install-nix-action@v22
       - name: Test
         run: |
           nix develop --ignore-environment --keep HOME --command bash -c "go install && ~/go/bin/tinygo version && ~/go/bin/tinygo build -o test ./testdata/cgo"

.github/workflows/sizediff-install-pkgs.sh

@@ -2,11 +2,11 @@
 # still works after checking out the dev branch (that is, when going from LLVM
 # 16 to LLVM 17 for example, both Clang 16 and Clang 17 are installed).
 
-echo 'deb https://apt.llvm.org/noble/ llvm-toolchain-noble-20 main' | sudo tee /etc/apt/sources.list.d/llvm.list
+echo 'deb https://apt.llvm.org/noble/ llvm-toolchain-noble-19 main' | sudo tee /etc/apt/sources.list.d/llvm.list
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
 sudo apt-get update
 sudo apt-get install --no-install-recommends -y \
-    llvm-20-dev \
+    llvm-19-dev \
-    clang-20 \
+    clang-19 \
-    libclang-20-dev \
+    libclang-19-dev \
-    lld-20
+    lld-19

.github/workflows/sizediff.yml

@@ -20,24 +20,24 @@ jobs:
         run: |
           echo "$HOME/go/bin" >> $GITHUB_PATH
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0 # fetch all history (no sparse checkout)
           submodules: true
       - name: Install apt dependencies
         run: ./.github/workflows/sizediff-install-pkgs.sh
       - name: Restore LLVM source cache
-        uses: actions/cache@v5
+        uses: actions/cache@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-20-sizediff-v1
+          key: llvm-source-19-sizediff-v1
           path: |
             llvm-project/compiler-rt
       - name: Download LLVM source
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Cache Go
-        uses: actions/cache@v5
+        uses: actions/cache@v4
         with:
           key: go-cache-linux-sizediff-v2-${{ hashFiles('go.mod') }}
           path: |

.github/workflows/windows.yml

@@ -23,14 +23,15 @@ jobs:
           minimum-size: 8GB
           maximum-size: 24GB
           disk-root: "C:"
-      - uses: MinoruSekine/setup-scoop@v4
+      - uses: brechtm/setup-scoop@v2
+        with:
+          scoop_update: 'false'
       - name: Install Dependencies
         shell: bash
         run: |
-          scoop config use_external_7zip true
           scoop install ninja binaryen
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           submodules: true
       - name: Extract TinyGo version
@@ -38,15 +39,15 @@ jobs:
         shell: bash
         run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.26.2'
+          go-version: '1.24'
           cache: true
       - name: Restore cached LLVM source
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-20-windows-v1
+          key: llvm-source-19-windows-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -57,7 +58,7 @@ jobs:
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         run: make llvm-source
       - name: Save cached LLVM source
-        uses: actions/cache/save@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-source.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
@@ -68,10 +69,10 @@ jobs:
             llvm-project/lld/include
             llvm-project/llvm/include
       - name: Restore cached LLVM build
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-20-windows-v2
+          key: llvm-build-19-windows-v1
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -85,27 +86,35 @@ jobs:
           # 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@v5
+        uses: actions/cache/save@v4
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         with:
           key: ${{ steps.cache-llvm-build.outputs.cache-primary-key }}
           path: llvm-build
-      - name: Cache Go cache
+      - name: Cache wasi-libc sysroot
-        uses: actions/cache@v5
+        uses: actions/cache@v4
+        id: cache-wasi-libc
         with:
-          key: go-cache-windows-v2-${{ hashFiles('go.mod') }}
+          key: wasi-libc-sysroot-v5
+          path: lib/wasi-libc/sysroot
+      - name: Build wasi-libc
+        if: steps.cache-wasi-libc.outputs.cache-hit != 'true'
+        run: make wasi-libc
+      - name: Cache Go cache
+        uses: actions/cache@v4
+        with:
+          key: go-cache-windows-v1-${{ hashFiles('go.mod') }}
           path: |
             C:/Users/runneradmin/AppData/Local/go-build
             C:/Users/runneradmin/go/pkg/mod
       - name: Install wasmtime
         run: |
-          scoop config use_external_7zip true
           scoop install wasmtime@29.0.1
       - name: make gen-device
         run: make -j3 gen-device
       - name: Test TinyGo
         shell: bash
-        run: make test GOTESTFLAGS="-only-current-os"
+        run: make test GOTESTFLAGS="-short"
       - name: Build TinyGo release tarball
         shell: bash
         run: make build/release -j4
@@ -114,11 +123,16 @@ jobs:
         working-directory: build/release
         run: 7z -tzip a tinygo${{ steps.version.outputs.version }}.windows-amd64.zip tinygo
       - name: Publish release artifact
-        uses: actions/upload-artifact@v7
+        # 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@v4
         with:
-          name: tinygo${{ steps.version.outputs.version }}.windows-amd64.zip
+          name: windows-amd64-double-zipped-${{ steps.version.outputs.version }}
           path: build/release/tinygo${{ steps.version.outputs.version }}.windows-amd64.zip
-          archive: false
 
   smoke-test-windows:
     runs-on: windows-2022
@@ -130,25 +144,29 @@ jobs:
           minimum-size: 8GB
           maximum-size: 24GB
           disk-root: "C:"
-      - uses: MinoruSekine/setup-scoop@v4
+      - uses: brechtm/setup-scoop@v2
+        with:
+          scoop_update: 'false'
       - name: Install Dependencies
         shell: bash
         run: |
-          scoop config use_external_7zip true
           scoop install binaryen
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.26.2'
+          go-version: '1.24'
           cache: true
       - name: Download TinyGo build
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@v4
         with:
-          name: tinygo${{ needs.build-windows.outputs.version }}.windows-amd64.zip
+          name: windows-amd64-double-zipped-${{ needs.build-windows.outputs.version }}
           path: build/
-        # This build is already unzipped.
+      - name: Unzip TinyGo build
+        shell: bash
+        working-directory: build
+        run: 7z x tinygo*.windows-amd64.zip -r
       - name: Smoke tests
         shell: bash
         run: make smoketest TINYGO=$(PWD)/build/tinygo/bin/tinygo
@@ -164,18 +182,21 @@ jobs:
           maximum-size: 24GB
           disk-root: "C:"
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.26.2'
+          go-version: '1.24'
           cache: true
       - name: Download TinyGo build
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@v4
         with:
-          name: tinygo${{ needs.build-windows.outputs.version }}.windows-amd64.zip
+          name: windows-amd64-double-zipped-${{ needs.build-windows.outputs.version }}
           path: build/
-        # This build is already unzipped.
+      - name: Unzip TinyGo build
+        shell: bash
+        working-directory: build
+        run: 7z x tinygo*.windows-amd64.zip -r
       - name: Test stdlib packages
         run: make tinygo-test TINYGO=$(PWD)/build/tinygo/bin/tinygo
 
@@ -189,24 +210,28 @@ jobs:
           minimum-size: 8GB
           maximum-size: 24GB
           disk-root: "C:"
-      - uses: MinoruSekine/setup-scoop@v4
+      - uses: brechtm/setup-scoop@v2
+        with:
+          scoop_update: 'false'
       - name: Install Dependencies
         shell: bash
         run: |
-          scoop config use_external_7zip true
+          scoop install binaryen && scoop install wasmtime@29.0.1
-          scoop install binaryen wasmtime@29.0.1
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.26.2'
+          go-version: '1.24'
           cache: true
       - name: Download TinyGo build
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@v4
         with:
-          name: tinygo${{ needs.build-windows.outputs.version }}.windows-amd64.zip
+          name: windows-amd64-double-zipped-${{ needs.build-windows.outputs.version }}
           path: build/
-        # This build is already unzipped.
+      - name: Unzip TinyGo build
+        shell: bash
+        working-directory: build
+        run: 7z x tinygo*.windows-amd64.zip -r
       - name: Test stdlib packages on wasip1
         run: make tinygo-test-wasip1-fast TINYGO=$(PWD)/build/tinygo/bin/tinygo

.gitmodules

@@ -16,13 +16,13 @@
 	url = https://github.com/WebAssembly/wasi-libc
 [submodule "lib/picolibc"]
 	path = lib/picolibc
-	url = https://github.com/picolibc/picolibc.git
+	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 = https://github.com/tinygo-org/musl-libc.git
+	url = git://git.musl-libc.org/musl
 [submodule "lib/binaryen"]
 	path = lib/binaryen
 	url = https://github.com/WebAssembly/binaryen.git
@@ -35,9 +35,7 @@
 [submodule "src/net"]
 	path = src/net
 	url = https://github.com/tinygo-org/net.git
+	branch = dev
 [submodule "lib/wasi-cli"]
 	path = lib/wasi-cli
 	url = https://github.com/WebAssembly/wasi-cli
-[submodule "lib/bdwgc"]
-	path = lib/bdwgc
-	url = https://github.com/ivmai/bdwgc.git

BUILDING.md

@@ -85,17 +85,11 @@ Try running TinyGo:
 
     ./build/tinygo help
 
-Also, make sure the `tinygo` binary really is statically linked. The command to check for 
+Also, make sure the `tinygo` binary really is statically linked. Check this
-dynamic dependencies differs depending on your operating system.
+using `ldd` (not to be confused with `lld`):
-
-On Linux, use `ldd` (not to be confused with `lld`):
 
     ldd ./build/tinygo
 
-On macOS, use otool -L:
-
-    otool -L ./build/tinygo
-
 The result should not contain libclang or libLLVM.
 
 ## Make a release tarball

CHANGELOG.md

@@ -1,530 +1,3 @@
-0.41.1
----
-* **machine**
-  - esp32c3: correct pin interrupt setup call that was overlooked from #5320
-* **runtime**
-  - esp32s3: wait for TIMG0 update register to clear before reading timer registers
-* **net**
-  - update net module to a version that is backwards compatible with Go 1.25.x to fix #5332
-
-0.41.0
----
-* **general**
-  - go.mod, compiler: bump minimum Go version to 1.23
-  - builder: support Go 1.26 now
-  - feat: add inheritable-only field to filter processor-level targets (#5270)
-  - feature: add esp32flash flash method for esp32s3/esp32c3/esp32/esp8266
-  - flashing: introduce flash method 'esp32jtag' for esp32c3/esp32s3 targets
-  - fashing: add "adb" flash method using Android Debug Bridge
-  - main: auto-use best available flashing options on esp32
-  - espflasher: update to espflasher 0.6.0
-* **compiler**
-  - implement method-set based AssignableTo and Implements (#5304)
-  - simplify createObjectLayout
-  - implement copy directly
-  - fix min/max on floats by using intrinsics
-  - add element layout to sliceAppend
-  - add intrinsic for crypto/internal/constanttime.boolToUint8
-  - fix SyscallN handling for Windows on Go 1.26+
-* **core**
-  - reflect: add TypeAssert
-  - reflect: fix TypeAssert for structs
-  - sync: add WaitGroup.Go
-  - os: add UserCacheDir and UserConfigDir
-  - os: implement Lchown function for changing file ownership (#5161)
-  - testing: add b.ReportMetric()
-  - errors: add errors package to passing list
-  - internal/gclayout: use correct lengths
-  - internal/abi: add EscapeNonString, EscapeToResultNonString
-  - internal, runtime: add internal fips bool
-  - internal/itoa: resurrect from Go stdlib
-  - internal/syscall/unix: implement GetRandom for WASI targets
-  - interp: make ptrtoint size mismatch a recoverable error
-  - loader: support "all:" prefix in //go:embed patterns
-  - loader, crypto/internal/entropy: fix 32 MiB RAM overflow on microcontrollers
-  - loader, unicode/utf8: fix hiBits overflow on 16-bit AVR targets
-  - builder: order embedded files deterministically
-  - builder: fix panic in findPackagePath when using -size short
-  - builder: fix SIGSEGV when stripping duplicate function definitions
-  - builder, runtime: fix duplicate symbol error with Go 1.26+ on Windows
-  - builder: use target-specific -march for RISC-V library compilation
-  - transform: modify output format from the -print-allocs flag to match the go coverage tool format
-  - cgo: allow for changes to 'short-enums' flag
-  - wasm: add more stubbed file operations
-* **machine**
-  - esp32c3: implement BlockDevice for esp32c3 flash
-  - esp32c3: clear GPIO STATUS before dispatching pin callbacks
-  - esp32c3: implement USBDevice using interrupts
-  - esp32c3: add Enable stub for QEMU test target
-  - esp32c3: fix interrupt disable handling
-  - esp32c3: clear MCAUSE after handling interrupt
-  - esp32c3: map missing IRAM sections in linker script
-  - esp32c3: fix to use PROVIDE() for WiFi/BLE ROM function addresses to allow blob overrides
-  - esp32c3: add WiFi/BLE ROM linker support
-  - esp32c3: use TIMG0 alarm interrupt for sleepTicks instead of busy-waiting
-  - esp32s3: implement Pin.SetInterrupt for GPIO pin change interrupts
-  - esp32s3: use edge-triggered CPU interrupt for GPIO pin interrupts
-  - esp32s3: add interrupt support (#5244)
-  - esp32s3: switch USB implementation to use interrupts instead of polling
-  - esp32s3: replace inline ISR with full interrupt vector handler
-  - esp32s3: use TIMG0 alarm interrupt for sleepTicks
-  - esp32s3: improve exception handlers, add procPin/procUnpin, and linker wrap flags
-  - esp32s3: fix Xtensa register window spill using recursive call4 in task switching
-  - esp32s3: update linker script and boot assembly for multi-page flash XIP mapping
-  - esp32s3: add flash XIP boot assembly with cache/MMU init
-  - esp32s3: implement SPI (#5169)
-  - esp32s3: implement I2C interface (#5210)
-  - esp32s3: implement RNG based on onboard hardware random number generator
-  - esp32s3,esp32c3: add USB serial support
-  - esp32s3,esp32c3: add txStalled flag to skip USB serial spin when no host
-  - esp32s3,esp32c3: make USB Serial/JTAG writes non-blocking when FIFO is full
-  - esp32c3/esp32s3: refactor ADC implementation to reduce code duplication
-  - esp32s3,esp32c3: add ADC support (#5231)
-  - esp32s3,esp32c3: add PWM support (#5215)
-  - esp32c3/esp32s3: refactoring and corrections for SPI implementation
-  - esp32xx: add WASM simulator support for ESP32-C3/ESP32-S3 targets
-  - esp32: default SPI CS pin to NoPin when unset
-  - esp: fix tinygo_scanCurrentStack to spill register windows
-  - stm32: fix UART interrupt storm caused by uncleared overrun error
-  - stm32: fix PWM problem due to register shifting
-  - stm32: add STM32U585 target definition and runtime
-  - stm32: add STM32U5 GPIO, pin interrupts, and UART support
-  - stm32: add STM32U5 I2C support
-  - stm32: add STM32U5 SPI support
-  - stm32u585: implement ADC
-  - stm32g0b1: add support (#5150)
-  - stm32g0b1: add Watchdog + ADC support (#5158)
-  - stm32l0: add flash support
-  - stm32l0x1,l0x2: TIM: adapt to 32-bit register access
-  - stm32g0: sync with updated stm32 device files
-  - attiny85: add USI-based SPI support (#5181)
-  - attiny85: add PWM support (#5171)
-  - rp: add Close function to UART to allow for removing all system resources/power usage
-  - rp: use blockReset() and unresetBlockWait() helper functions for peripheral reset/unreset
-  - rp2: prevent PWM Period method overflow
-  - rp2: add per-byte timeout budget for I2C (#5189)
-  - feather-m0: export UART0 and pins
-  - usb/cdc: better ring buffer implementation (#5209)
-  - fix: replace ! with ~ for register mask
-  - atmega328p_simulator: add correct build tag for arduino_uno after renaming
-* **net**
-  - update to Go 1.26.2 net package with UDP and JS improvements
-* **runtime**
-  - implement fminimum/fmaximum
-  - make timeoffset atomic
-  - add MemStats.HeapObjects
-  - handle GODEBUG on wasip2 (#5312)
-  - fix Darwin syscall return value truncation and lost arguments
-  - add syscall.runtimeClearenv for Go 1.26
-  - split syscall functions for darwin changes for 1.26
-  - fix: init heap before random number seed on wasm platforms
-* **targets**
-  - add esp32s3-supermini board target
-  - add support for Seeedstudio Xiao-RP2350 board
-  - add Shrike Lite board (#5170)
-  - rename arduino target to arduino-uno
-  - add pins/setup for Arduino UNO Q board QWIIC connector
-  - correct pin mapping for Arduino UNO Q STM32 MCU
-  - add stm32u585 openocd commands for flashing on Arduino UNO Q
-  - correct name/tag use for esp32s3-wroom1 board
-  - modify esp32, esp32s3, esp32c3, & esp8266 targets to use built-in esp32flash
-  - switch rp2040/rp2350 to default to tasks scheduler
-  - change default stack size for esp32c3 and esp32s3 to 8196
-  - swan: rename group build tag stm32l4x5 => stm32l4y5 to avoid clash with stm32 device name
-  - nucleo-f722ze: add build-tag stm32f722
-  - fix: set stm32u5x clock rate to default
-  - create generic targets for esp32 boards
-* **libs**
-  - stm32-svd: update submodule
-  - update tools/gen-device-svd for recent changes to stm32-svd file structure (#5212)
-* **build/test**
-  - build: use Golang 1.26 for all builds
-  - build: actually use the version of llvm we are supposed to be testing by using brew link command
-  - build: let scoop run updates to resolve binaryen install failures on Windows
-  - ci: don't double zip release artifacts
-  - test: increase default timeout from 1 to 2 minutes to prevent spurious CI fails
-  - testdata: fix flaky timers test by draining ticker channel after Stop
-  - testdata: more corpus entries (#5182)
-  - add soypat/lneto to corpus
-  - GNUmakefile: add context and expvar to stdlib tests
-  - GNUmakefile: add encoding/xml to stdlib tests on Linux
-  - main (test): skip mipsle test if the emulator is missing
-  - make: remove machine without board from smoketest
-  - stm32: add Arduino UNO Q to smoketests
-  - flake: bump to nixpkgs 25.11
-  - chore: update all github actions to latest versions
-  - fix: use external 7zip for scoop installs on Windows
-
-0.40.1
----
-* **machine**
-  - nrf: fix flash writes when SoftDevice is enabled
-* **runtime**
-  - runtime: avoid fixed math/rand sequence on RP2040/RP2350 (#5124)
-  - runtime: add calls to initRand() during run() for all schedulers
-  - runtime: call initRand() before initHeap() during initialization
-  - runtime: use rand_hwrng hardwareRand for RP2040/RP2350 (#5135)
-* **libs**
-  - picolibc: use updated location for git repo
-
-0.40.0
----
-* **general**
-  - all: add full LLVM 20 support
-  - core: feat: enable //go:linkname pragma for globals
-  - core: feature: Add flag to ignore go compatibility matrix (#5078)
-  - chore: update version for 0.40 development cycle
-* **compiler**
-  - emit an error when the actual arch doesn't match GOARCH
-  - mark string parameters as readonly
-  - use Tarjan's SCC algorithm to detect loops for defer
-  - lower "large stack" limit to 16kb
-* **core**
-  - shrink bdwgc library
-  - Fix linker errors for runtime.vgetrandom and crypto/internal/sysrand.fatal
-  - fix: add TryLock to sync.RWMutex
-  - fix: correct linter issues exposed by the fix in #4679
-  - fix: don't hardcode success return state
-  - fix: expand RTT debugger compatibility
-  - internal/task (threads): save stack bounds instead of scanning under a lock
-  - internal/task: create detached threads and fix error handling
-  - interp: better errors when debugging interp
-  - transform (gc): create stack slots in callers of external functions
-  - internal/task: prevent semaphore resource leak for threads scheduler
-* **machine**
-  - cortexm: optimize code size for the HardFault_Handler
-  - fe310: add I2C pins for the HiFive1b
-  - clarify WriteAt semantics of BlockDevice
-  - fix deprecated AsmFull comment (#5005)
-  - make sure DMA buffers do not escape unnecessarily
-  - only enable USB-CDC when needed
-  - use larger SPI MAXCNT on nrf52833 and nrf52840
-  - fix: update m.queuedBytes when clamping output to avoid corrupting sentBytes
-  - fix: use int64 in ReadTemperature to avoid overflow
-  - fix(rp2): disable DBGPAUSE on startup
-  - fix(rp2): possible integer overflow while computing factors for SPI baudrate
-  - fix(rp2): reset spinlocks at startup
-  - fix(rp2): switch spinlock busy loop to wfe
-  - fix(rp2): use side-effect-free spinlocks
-  - nrf: add ADC_VDDH which is an ADC pin for VDDH
-  - nrf: don't block SPI transfer
-  - nrf: don't set PSELN, it's ignored in single ended mode anyway
-  - nrf: fix typo in ADC configuration
-  - nrf: refactor SoftDevice enabled check
-  - nrf: rename pwmPin to adcPin
-  - nrf: support flash operations while the SoftDevice is enabled
-  - rp2040: allow writing to the UART inside interrupts
-  - machine,nrf528: stop the bus only once on I2C bus error and ensures the first error is returned
-* **net**
-  - update submodule to latest commits
-* **runtime**
-  - (avr): fix infinite longjmp loop if stack is aligned to 256 bytes
-  - (gc_blocks.go): clear full size of allocation
-  - (gc_blocks.go): make sweep branchless
-  - (gc_blocks.go): simplify scanning logic
-  - (gc_blocks.go): use a linked stack to scan marked objects
-  - (gc_blocks.go): use best-fit allocation
-  - (gc_boehm.go): fix world already stopped check
-  - (wasm): scan the system stack
-  - fix sleep duration for long sleeps
-  - remove copied code for nrf52840
-  - src/syscall: update src buffer after write
-  - wasm: fix C realloc and optimize it a bit
-* **targets**
-  - add xiao-esp32s3 board target
-  - Add ESP32-S3 support (#5091)
-  - Added Gopher ARCADE board
-  - Create "pico2-ice" target board (#5062)
-* **build/test**
-  - Add testing.T.Context() and testing.B.Context()
-  - create separate go.mod file for testing dependencies for wasm tests that use Chromium headless browser to avoid use of older incompatible version.
-  - go back to normal scheduler instead of tasks scheduler for macos CI
-  - update CI to use Go 1.25.5
-  - update macOS GH actions builds to handle sunset of macOS 13
-  - use task scheduler on macOS builds to avoid test race condition lockups
-  - update all CI builds to use latest stable Go release. Also update some of the actions to their latest releases.
-  - update GH actions builds to use Go 1.25.4
-  - uninstall cmake before install
-  - fix: point the submodule for musl-lib to a mirror in the TinyGo GitHub org
-  - fix: remove macOS 15 from CI build matrix (conflicts with macOS 14 build)
-  - fix: separate host expected bytes from device intended bytes
-  - fix/typo: makeESPFirmwareImage
-  - make: GNUmakefile: shrink TinyGo binaries on Linux
-  - move the directory list into a variable
-  - several improvements to the macOS GH actions build
-  - Fix for #4678: top-level 'make lint' wasn't working
-  - fix: increase the timeout for chromedp to connect to the headless browser used for running the wasm tests.
-  - testdata: some more packages for the test corpus
-
-0.39.0
----
-* **general**
-  - all: add Go 1.25 support
-  - net: update to latest tinygo net package
-  - docs: clarify build verification step for macOS users
-  - Add flag to skip Renesas SVD builds
-* **build**
-  - Makefile: install missing dlmalloc files
-  - flash: add -o flag support to save built binary (Fixes #4937) (#4942)
-  - fix: update version of clang to 17 to accommodate latest Go 1.25 docker base image
-* **ci**
-  - chore: update all CI builds to test Go 1.25 release
-  - fix: disable test-newest since CircleCI seems unable to download due to rate-limits on Dockerhub
-  - ci: rename some jobs to avoid churn on every Go/LLVM version bump
-  - ci: make the goroutines test less racy
-  - tests: de-flake goroutines test
-* **compiler**
-  - compiler: implement internal/abi.Escape
-* **main**
-  - main: show the compiler error (if any) for `tinygo test -c`
-  - chore: correct GOOS=js name in error messages for WASM
-* **machine**
-  - machine: add international keys
-  - machine: remove some unnecessary "// peripherals:" comments
-  - machine: add I2C pin comments
-  - machine: standardize I2C errors with "i2c:" prefix
-  - machine: make I2C usable in the simulator
-  - fix: add SPI and I2C to teensy 4.1 (#4943)
-  - `rp2`: use the correct channel mask for rp2350 ADC; hold lock during read (#4938)
-  - `rp2`: disable digital input for analog inputs
-* **runtime**
-  - runtime: ensure time.Sleep(d) sleeps at least d
-  - runtime: stub out weak pointer support
-  - runtime: implement dummy AddCleanup
-  - runtime: enable multi-core scheduler for rp2350
-  - `internal/task`: use -stack-size flag when starting a new thread
-  - `internal/task`: add SA_RESTART flag to GC interrupts
-  - `internal/task`: a few small correctness fixes
-  - `internal/gclayout`: make gclayout values constants
-  - darwin: add threading support and use it by default
-* **standard library**
-  - `sync`: implement sync.Swap
-  - `reflect`: implement Method.IsExported
-* **testing**
-  - testing: stub out testing.B.Loop
-* **targets**
-  - `stm32`: add support for the STM32L031G6U6
-  - add metro-rp2350 board definition (#4989)
-  - `rp2040/rp2350`: set the default stack size to 8k for rp2040/rp2350 based boards where this was not already the case
-
-
-0.38.0
----
-* **general**
-  - `go.*`: upgrade `golang.org/x/tools` to v0.30.0
-  - `all`: add support for LLVM 20
-* **build**
-  - go back to using MinoruSekine/setup-scoop for Windows CI builds
-  - `flake.*`: upgrade to nixpkgs 25.05, LLVM 20
-  - `Makefile`: only detect ccache command when needed
-  - `Makefile`: create random filename inside rule
-  - `Makefile`: don't set GOROOT
-  - `Makefile`: call uname at most once
-  - `Makefile`: only read NodeJS version when it is needed
-* **compiler**
-  - add support for `GODEBUG=gotypesalias=1`
-  - `interp`: fix `copy()` from/to external buffers
-  - add `-nobounds` (similar to `-gcflags=-B`)
-  - `compileopts`: add library version to cached library path
-  - `builder`: build wasi-libc inside TinyGo
-  - `builder`: simplify bdwgc libc dependency
-  - `builder`: don't use precompiled libraries
-  - `compileopts`: enable support for `GOARCH=wasm` in `tinygo test`
-* **fixes**
-  - `rp2350`: Fix DMA to SPI transmits on RP2350 (#4903)
-  - `microbit v2`: use OpenOCD flash method on microbit v2 when using Nordic Semi SoftDevice
-  - `main`: display all of the current GC options for the `-gc` flag
-  - Remove duplicated error handling
-  - `sync`: fix `TestMutexConcurrent` test
-  - fix race condition in `testdata/goroutines.go`
-  - fix build warnings on Windows ARM
-* **machine**
-  - `usb`: add USB mass storage class support
-  - implement usb receive message throttling
-  - declare usb endpoints per-platform
-  - `samd21`: implement watchdog
-  - `samd51`: write to flash memory in 512 byte long chunks
-  - `samd21`: write to flash memory in 64 byte long chunks
-  - don't inline RTT `WriteByte` everywhere
-  - `rp2`: unexport machine-specific errors
-  - `rp2`: discount scheduling delays in I2C timeouts (#4876)
-  - use pointer receiver in simulated PWM peripherals
-  - add simulated PWM/timer peripherals
-  - `rp2`: expose usb endpoint stall handling
-  - `arm`: clear pending interrupts before enabling them
-  - `rp2`: merge common usb code (#4856)
-* **main**
-  - add "cores" and "threads" schedulers to help text
-  - add `StartPos` and `EndPos` to `-json` build output
-  - change `-json` flag to match upstream Go
-* **runtime**
-  - don't lock the print output inside interrupts
-  - don't try to interrupt other cores before they are started
-  - implement `NumCPU` for the multicore scheduler
-  - add support for multicore scheduler
-  - refactor obtaining the system stack
-  - `interrupt`: add `Checkpoint` type
-  - add `exportedFuncPtr`
-  - avoid an allocation in `(*time.Timer).Reset`
-  - stub runtime signal functions for `os/signal` on wasip1
-  - move `timeUnit` to a single place
-  - implement `NumCPU` for `-scheduler=threads`
-  - move `mainExited` boolean
-  - `internal/task`: rename `tinygo_pause` to `tinygo_task_exit`
-  - map every goroutine to a new OS thread
-  - refactor `timerQueue`
-  - make conservative and precise GC MT-safe
-  - `internal/task`: implement atomic primitives for preemptive scheduling
-  - Use diskutil on macOS to extract volume name and path for FAT mounts #4928
-* **standard library**
-  - `net`: update submodule to latest commits
-  - `runtime/debug`: add GC related stubs
-  - `metrics`: flesh out some of the metric types
-  - `reflect`: Chan related stubs
-  - `os`: handle relative and abs paths in `Executable()`
-  - `os`: add `os.Executable()` for Darwin
-  - `sync`: implement `RWMutex` using futexes
-  - `reflect`: Add `SliceOf`, `ArrayOf`, `StructOf`, `MapOf`, `FuncOf`
-* **targets**
-  - `rp2040`: add multicore support
-  - `riscv32`: use `gdb` binary as a fallback
-  - add target for Microbit v2 with SoftDevice S140 support for both peripheral and central
-  - `windows`: use MSVCRT.DLL instead of UCRT on i386
-  - `windows`: add windows/386 support
-  - `arm64`: remove unnecessary `.section` directive
-  - `riscv-qemu`: actually sleep in `time.Sleep()`
-  - `riscv`: define CSR constants and use them where possible
-  - `darwin`: support Boehm GC (and use by default)
-  - `windows`: add support for the Boehm-Demers-Weiser GC
-  - `windows`: fix wrong register for first parameter
-* **wasm**
-  - add Boehm GC support
-  - refactor/modify stub signal handling
-  - don't block `//go:wasmexport` because of running goroutines
-  - use `int64` instead of `float64` for the `timeUnit`
-* **boards**
-  - Add board support for BigTreeTech SKR Pico (#4842)
-
-
-0.37.0
----
-* **general**
-  - add the Boehm-Demers-Weiser GC on Linux
-* **ci**
-  - add more tests for wasm and baremetal
-* **compiler**
-  - crypto/internal/sysrand is allowed to use unsafe signatures
-* **examples**
-  - add goroutine benchmark to examples
-* **fixes**
-  - ensure use of pointers for SPI interface on atsam21/atsam51 and other machines/boards that were missing implementation (#4798)
-  - replace loop counter with hw timer for USB SetAddressReq on rp2040 (#4796)
-* **internal**
-  - update to go.bytecodealliance.org@v0.6.2 in GNUmakefile and internal/wasm-tools
-  - exclude certain files when copying package in internal/cm
-  - update to go.bytecodealliance.org/cm@v0.2.2 in internal/cm
-  - remove old reflect.go in internal/reflectlite
-* **loader**
-  - use build tags for package iter and iter methods on reflect.Value in loader, iter, reflect
-  - add shim for go1.22 and earlier in loader, iter
-* **machine**
-  - bump rp2040 to 200MHz (#4768)
-  - correct register address for Pin.SetInterrupt for rp2350 (#4782)
-  - don't block the rp2xxx UART interrupt handler
-  - fix RP2040 Pico board on the playground
-  - add flash support for rp2350 (#4803)
-* **os**
-  - add stub Symlink for wasm
-* **refactor**
-  - use *SPI everywhere to make consistent for implementations. Fixes #4663 "in reverse" by making SPI a pointer everywhere, as discussed in the comments.
-* **reflect**
-  - add Value.SetIter{Key,Value} and MapIter.Reset in reflect, internal/reflectlite
-  - embed reflectlite types into reflect types in reflect, internal/reflectlite
-  - add Go 1.24 iter.Seq[2] methods
-  - copy reflect iter tests from upstream Go
-  - panic on Type.CanSeq[2] instead of returning false
-  - remove strconv.go
-  - remove unused go:linkname functions
-* **riscv-qemu**
-  - add VirtIO RNG device
-  - increase stack size
-* **runtime**
-  - only allocate heap memory when needed
-  - remove unused file func.go
-  - use package reflectlite
-* **transform**
-  - cherry-pick from #4774
-
-
-0.36.0
----
-* **general**
-  - add initial Go 1.24 support
-  - add support for LLVM 19
-  - update license for 2025
-  - make small corrections for README regarding wasm
-  - use GOOS and GOARCH for building wasm simulated boards
-  - only infer target for wasm when GOOS and GOARCH are set correctly, not just based on file extension
-  - add test-corpus-wasip2
-  - use older image for cross-compiling builds
-  - update Linux builds to run on ubuntu-latest since 20.04 is being retired
-  - ensure build output directory is created
-  - add NoSandbox flag to chrome headless that is run during WASM tests, since this is now required for Ubuntu 23+ and we are using Ubuntu 24+ when running Github Actions
-  - update wasmtime used for CI to 29.0.1 to fix issue with install during CI tests
-  - update to use `Get-CimInstance` as `wmic` is being deprecated on WIndows
-  - remove unnecessary executable permissions
-  - `goenv`: update to new v0.36.0 development version
-* **compiler**
-  - `builder`: fix parsing of external ld.lld error messages
-  - `cgo`: mangle identifier names
-  - `interp`: correctly mark functions as modifying memory
-  - add buildmode=wasi-legacy to support existing base of users who expected the older behavior for wasi modules to not return an exit code as if they were reactors
-* **standard library**
-  - `crypto/tls`: add Dialer.DialContext() to fix websocket client
-  - `crypto/tls`: add VersionTLS constants and VersionName(version uint16) method that turns it into a string, copied from big go
-  - `internal/syscall/unix`: use our own version of this package
-  - `machine`: replace hard-coded cpu frequencies on rp2xxx
-  - `machine`: bump rp2350 CPUFrequency to 150 MHz
-  - `machine`: compute rp2 clock dividers from crystal and target frequency
-  - `machine`: remove bytes package dependency in flash code
-  - `machine/usb/descriptor`: avoid bytes package
-  - `net`: update to latest submodule with httptest subpackage and ResolveIPAddress implementation
-  - `os`: add File.Chdir support
-  - `os`: implement stub Chdir for non-OS systems
-  - `os/file`: add file.Chmod
-  - `reflect`: implement Value.Equal
-  - `runtime`: add FIPS helper functions
-  - `runtime`: manually initialize xorshift state
-  - `sync`: move Mutex to internal/task
-  - `syscall`: add wasip1 RandomGet
-  - `testing`: add Chdir
-  - `wasip2`: add stubs to get internal/syscall/unix to work
-* **fixes**
-  - correctly handle calls for GetRNG() when being made from nrf devices with SoftDevice enabled
-  - fix stm32f103 ADC
-  - `wasm`: correctly handle id lookup for finalizeRef call
-  - `wasm`: avoid total failure on wasm finalizer call
-  - `wasm`: convert offset as signed int into unsigned int in syscall/js.stringVal in wasm_exec.js
-* **targets**
-  - rp2350: add pll generalized solution; fix ADC handles; pwm period fix
-  - rp2350: extending support to include the rp2350b
-  - rp2350: cleanup: unexport internal USB and clock package variable, consts and types
-  - nrf: make ADC resolution changeable
-  - turn on GC for TKey1 device, since it does in fact work
-  - match Pico2 stack size to Pico
-* **boards**
-  - add support for Pimoroni Pico Plus2
-  - add target for pico2-w board
-  - add comboat_fw tag for elecrow W5 boards with Combo-AT Wifi firmware
-  - add support for Elecrow Pico rp2350 W5 boards
-  - add support for Elecrow Pico rp2040 W5 boards
-  - add support for NRF51 HW-651
-  - add support for esp32c3-supermini
-  - add support for waveshare-rp2040-tiny
-* **examples**
-  - add naive debouncing for pininterrupt example
-
-
 0.35.0
 ---
 * **general**

Dockerfile

@@ -1,8 +1,8 @@
 # tinygo-llvm stage obtains the llvm source for TinyGo
-FROM golang:1.26 AS tinygo-llvm
+FROM golang:1.24 AS tinygo-llvm
 
 RUN apt-get update && \
-    apt-get install -y apt-utils make cmake clang-17 ninja-build && \
+    apt-get install -y apt-utils make cmake clang-15 ninja-build && \
     rm -rf \
         /var/lib/apt/lists/* \
         /var/log/* \
@@ -33,7 +33,7 @@ RUN cd /tinygo/ && \
 
 # tinygo-compiler copies the compiler build over to a base Go container (without
 # all the build tools etc).
-FROM golang:1.26 AS tinygo-compiler
+FROM golang:1.24 AS tinygo-compiler
 
 # Copy tinygo build.
 COPY --from=tinygo-compiler-build /tinygo/build/release/tinygo /tinygo

GNUmakefile

@@ -8,20 +8,13 @@ LLVM_PROJECTDIR ?= llvm-project
 CLANG_SRC ?= $(LLVM_PROJECTDIR)/clang
 LLD_SRC ?= $(LLVM_PROJECTDIR)/lld
 
-ifeq ($(OS),Windows_NT)
-    # avoid calling uname on Windows
-    uname := Windows_NT
-else
-    uname := $(shell uname -s)
-endif
-
 # Try to autodetect LLVM build tools.
 # Versions are listed here in descending priority order.
 LLVM_VERSIONS = 19 18 17 16 15
 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 ($(uname),Darwin)
+ifeq ($(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)
@@ -34,6 +27,7 @@ LLVM_NM ?= $(call findLLVMTool,llvm-nm)
 
 # Go binary and GOROOT to select
 GO ?= go
+export GOROOT = $(shell $(GO) env GOROOT)
 
 # Flags to pass to go test.
 GOTESTFLAGS ?=
@@ -44,10 +38,14 @@ TINYGO ?= $(call detect,tinygo,tinygo $(CURDIR)/build/tinygo)
 
 # Check for ccache if the user hasn't set it to on or off.
 ifeq (, $(CCACHE))
-    LLVM_OPTION += '-DLLVM_CCACHE_BUILD=$(if $(shell command -v ccache 2> /dev/null),ON,OFF)'
+    # Use CCACHE for LLVM if possible
-else
+    ifneq (, $(shell command -v ccache 2> /dev/null))
-    LLVM_OPTION += '-DLLVM_CCACHE_BUILD=$(CCACHE)'
+        CCACHE := ON
+    else
+        CCACHE := OFF
+    endif
 endif
+LLVM_OPTION += '-DLLVM_CCACHE_BUILD=$(CCACHE)'
 
 # Allow enabling LLVM assertions
 ifeq (1, $(ASSERT))
@@ -79,26 +77,6 @@ ifeq (1, $(STATIC))
     BINARYEN_OPTION += -DCMAKE_CXX_FLAGS="-static" -DCMAKE_C_FLAGS="-static"
 endif
 
-# Optimize the binary size for Linux.
-# These flags may work on other platforms, but have only been tested on Linux.
-ifeq ($(uname),Linux)
-    HAS_MOLD := $(shell command -v ld.mold 2> /dev/null)
-    HAS_LLD := $(shell command -v ld.lld 2> /dev/null)
-    LLVM_CFLAGS := -ffunction-sections -fdata-sections -fvisibility=hidden
-    LLVM_LDFLAGS := -Wl,--gc-sections
-    ifneq ($(HAS_MOLD),)
-        # Mold might be slightly faster.
-        LLVM_LDFLAGS += -fuse-ld=mold -Wl,--icf=all
-    else ifneq ($(HAS_LLD),)
-        # LLD is more commonly available.
-        LLVM_LDFLAGS += -fuse-ld=lld -Wl,--icf=all
-    endif
-    LLVM_OPTION += \
-        -DCMAKE_C_FLAGS="$(LLVM_CFLAGS)" \
-        -DCMAKE_CXX_FLAGS="$(LLVM_CFLAGS)"
-    CGO_LDFLAGS += $(LLVM_LDFLAGS)
-endif
-
 # Cross compiling support.
 ifneq ($(CROSS),)
     CC = $(CROSS)-gcc
@@ -149,14 +127,14 @@ ifeq ($(OS),Windows_NT)
 
     USE_SYSTEM_BINARYEN ?= 1
 
-else ifeq ($(uname),Darwin)
+else ifeq ($(shell uname -s),Darwin)
     MD5SUM ?= md5
 
     CGO_LDFLAGS += -lxar
 
     USE_SYSTEM_BINARYEN ?= 1
 
-else ifeq ($(uname),FreeBSD)
+else ifeq ($(shell uname -s),FreeBSD)
     MD5SUM ?= md5
     START_GROUP = -Wl,--start-group
     END_GROUP = -Wl,--end-group
@@ -207,10 +185,7 @@ fmt-check: ## Warn if any source needs reformatting
 	@unformatted=$$(gofmt -l $(FMT_PATHS)); [ -z "$$unformatted" ] && exit 0; echo "Unformatted:"; for fn in $$unformatted; do echo "  $$fn"; done; exit 1
 
 
-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 ## Generate microcontroller-specific sources
+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 gen-device-renesas ## Generate microcontroller-specific sources
-ifneq ($(RENESAS), 0)
-gen-device: gen-device-renesas
-endif
 ifneq ($(STM32), 0)
 gen-device: gen-device-stm32
 endif
@@ -263,7 +238,7 @@ gen-device-renesas: build/gen-device-svd
 	GO111MODULE=off $(GO) fmt ./src/device/renesas
 
 $(LLVM_PROJECTDIR)/llvm:
-	git clone -b tinygo_20.x --depth=1 https://github.com/tinygo-org/llvm-project $(LLVM_PROJECTDIR)
+	git clone -b xtensa_release_19.1.2 --depth=1 https://github.com/espressif/llvm-project $(LLVM_PROJECTDIR)
 llvm-source: $(LLVM_PROJECTDIR)/llvm ## Get LLVM sources
 
 # Configure LLVM.
@@ -284,34 +259,40 @@ build/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)
+
 # Generate WASI syscall bindings
-WASM_TOOLS_MODULE=go.bytecodealliance.org
+WASM_TOOLS_MODULE=github.com/bytecodealliance/wasm-tools-go
 .PHONY: wasi-syscall
 wasi-syscall: wasi-cm
-	rm -rf ./src/internal/wasi/*
+	go run -modfile ./internal/wasm-tools/go.mod $(WASM_TOOLS_MODULE)/cmd/wit-bindgen-go generate --versioned -o ./src/internal -p internal --cm internal/cm ./lib/wasi-cli/wit
-	go run $(WASM_TOOLS_MODULE)/cmd/wit-bindgen-go generate --versioned -o ./src/internal -p internal --cm internal/cm ./lib/wasi-cli/wit
 
 # Copy package cm into src/internal/cm
 .PHONY: wasi-cm
 wasi-cm:
-	rm -rf ./src/internal/cm/*
+	# rm -rf ./src/internal/cm
-	rsync -rv --delete --exclude go.mod --exclude '*_test.go' --exclude '*_json.go' --exclude '*.md' --exclude LICENSE $(shell go list -m -f {{.Dir}} $(WASM_TOOLS_MODULE)/cm)/ ./src/internal/cm
+	rsync -rv --delete --exclude '*_test.go' $(shell go list -modfile ./internal/wasm-tools/go.mod -m -f {{.Dir}} $(WASM_TOOLS_MODULE))/cm ./src/internal/
 
 # Check for Node.js used during WASM tests.
+NODEJS_VERSION := $(word 1,$(subst ., ,$(shell node -v | cut -c 2-)))
 MIN_NODEJS_VERSION=18
 
 .PHONY: check-nodejs-version
 check-nodejs-version:
-	@# Check whether NodeJS is available.
+ifeq (, $(shell which node))
-	@if ! command -v node 2>&1 >/dev/null; then echo "Install NodeJS version ${MIN_NODEJS_VERSION}+ to run tests."; exit 1; fi
+	@echo "Install NodeJS version 18+ to run tests."; exit 1;
-
+endif
-	@# Check whether the version is high enough.
+	@if [ $(NODEJS_VERSION) -lt $(MIN_NODEJS_VERSION) ]; then echo "Install NodeJS version 18+ to run tests."; exit 1; fi
-	@if [ "`node -v | sed 's/v\([0-9]\+\).*/\\1/g'`" -lt $(MIN_NODEJS_VERSION) ]; then echo "Install NodeJS version $(MIN_NODEJS_VERSION)+ to run tests."; exit 1; fi
 
 tinygo: ## Build the TinyGo compiler
 	@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" .
-test: check-nodejs-version
+test: wasi-libc check-nodejs-version
 	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags "byollvm osusergo" $(GOTESTPKGS)
 
 # Standard library packages that pass tests on darwin, linux, wasi, and windows, but take over a minute in wasi
@@ -339,17 +320,14 @@ TEST_PACKAGES_FAST = \
 	embed/internal/embedtest \
 	encoding \
 	encoding/ascii85 \
-	errors \
 	encoding/asn1 \
 	encoding/base32 \
 	encoding/base64 \
 	encoding/csv \
 	encoding/hex \
-	expvar \
 	go/ast \
 	go/format \
 	go/scanner \
-	go/token \
 	go/version \
 	hash \
 	hash/adler32 \
@@ -362,7 +340,6 @@ TEST_PACKAGES_FAST = \
 	math/cmplx \
 	net/http/internal/ascii \
 	net/mail \
-	net/url \
 	os \
 	path \
 	reflect \
@@ -383,9 +360,9 @@ TEST_PACKAGES_FAST = \
 # crypto/des fails on wasi, needs panic()/recover()
 # 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
-# encoding/xml takes a minute on linux and gives a stack overflow on wasi
 # image requires recover(), which is not yet supported on wasi
 # io/ioutil requires os.ReadDir, which is not yet supported on windows or wasi
+# math/bits: needs panic()/recover()
 # mime: fail on wasi; neds panic()/recover()
 # mime/multipart: needs wasip1 syscall.FDFLAG_NONBLOCK
 # mime/quotedprintable requires syscall.Faccessat
@@ -401,15 +378,16 @@ TEST_PACKAGES_FAST = \
 TEST_PACKAGES_LINUX := \
 	archive/zip \
 	compress/flate \
-	context \
 	crypto/aes \
 	crypto/des \
 	crypto/hmac \
 	debug/dwarf \
 	debug/plan9obj \
-	encoding/xml \
+	encoding/binary \
+	go/constant \
 	image \
 	io/ioutil \
+	math/bits \
 	mime \
 	mime/multipart \
 	mime/quotedprintable \
@@ -429,44 +407,16 @@ TEST_PACKAGES_WINDOWS := \
 	compress/flate \
 	crypto/des \
 	crypto/hmac \
+	encoding/binary \
+	go/constant \
+	math/bits \
 	strconv \
 	text/template/parse \
 	$(nil)
 
-
-# These packages cannot be tested on wasm, mostly because these tests assume a
-# working filesystem. This could perhaps be fixed, by supporting filesystem
-# access when running inside Node.js.
-TEST_PACKAGES_WASM = $(filter-out $(TEST_PACKAGES_NONWASM), $(TEST_PACKAGES_FAST))
-TEST_PACKAGES_NONWASM = \
-	compress/lzw \
-	compress/zlib \
-	crypto/ecdsa \
-	debug/macho \
-	embed/internal/embedtest \
-	expvar \
-	go/format \
-	os \
-	testing \
-	$(nil)
-
-# These packages cannot be tested on baremetal.
-#
-# Some reasons why the tests don't pass on baremetal:
-#
-#   * No filesystem is available, so packages like compress/zlib can't be tested
-#     (just like wasm).
-#   * picolibc math functions apparently are less precise, the math package
-#     fails on baremetal.
-TEST_PACKAGES_BAREMETAL = $(filter-out $(TEST_PACKAGES_NONBAREMETAL), $(TEST_PACKAGES_FAST))
-TEST_PACKAGES_NONBAREMETAL = \
-	$(TEST_PACKAGES_NONWASM) \
-	math \
-	$(nil)
-
 # Report platforms on which each standard library package is known to pass tests
+jointmp := $(shell echo /tmp/join.$$$$)
 report-stdlib-tests-pass:
-	$(eval jointmp := $(shell echo /tmp/join.$$$$))
 	@for t in $(TEST_PACKAGES_DARWIN); do echo "$$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
@@ -475,11 +425,11 @@ report-stdlib-tests-pass:
 	@rm $(jointmp).*
 
 # Standard library packages that pass tests quickly on the current platform
-ifeq ($(uname),Darwin)
+ifeq ($(shell uname),Darwin)
 TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_DARWIN)
 TEST_IOFS := true
 endif
-ifeq ($(uname),Linux)
+ifeq ($(shell uname),Linux)
 TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_LINUX)
 TEST_IOFS := true
 endif
@@ -488,16 +438,11 @@ TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_WINDOWS)
 TEST_IOFS := false
 endif
 
-TEST_SKIP_FLAG := -skip='TestExtraMethods|TestParseAndBytesRoundTrip/P256/Generic|TestAsValidation'
-TEST_ADDITIONAL_FLAGS ?=
-
 # Test known-working standard library packages.
 # TODO: parallelize, and only show failing tests (no implied -v flag).
 .PHONY: tinygo-test
 tinygo-test:
-	@# TestExtraMethods: used by many crypto packages and uses reflect.Type.Method which is not implemented.
+	$(TINYGO) test $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
-	@# TestParseAndBytesRoundTrip/P256/Generic: relies on t.Skip() which is not implemented
-	$(TINYGO) test $(TEST_ADDITIONAL_FLAGS) $(TEST_SKIP_FLAG) $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
 	@# io/fs requires os.ReadDir, not yet supported on windows or wasi. It also
 	@# requires a large stack-size. Hence, io/fs is only run conditionally.
 	@# For more details, see the comments on issue #3143.
@@ -505,26 +450,24 @@ ifeq ($(TEST_IOFS),true)
 	$(TINYGO) test -stack-size=6MB io/fs
 endif
 tinygo-test-fast:
-	$(TINYGO) test $(TEST_SKIP_FLAG) $(TEST_PACKAGES_HOST)
+	$(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-wasm:
-	$(TINYGO) test -target wasm $(TEST_SKIP_FLAG) $(TEST_PACKAGES_WASM)
 tinygo-test-wasi:
-	$(TINYGO) test -target wasip1 $(TEST_SKIP_FLAG) $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
+	$(TINYGO) test -target wasip1 $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
 tinygo-test-wasip1:
-	GOOS=wasip1 GOARCH=wasm $(TINYGO) test $(TEST_SKIP_FLAG) $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
+	GOOS=wasip1 GOARCH=wasm $(TINYGO) test $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
 tinygo-test-wasip1-fast:
-	$(TINYGO) test -target=wasip1 $(TEST_SKIP_FLAG) $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
+	$(TINYGO) test -target=wasip1 $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
 
 tinygo-test-wasip2-slow:
-	$(TINYGO) test -target=wasip2 $(TEST_SKIP_FLAG) $(TEST_PACKAGES_SLOW)
+	$(TINYGO) test -target=wasip2 $(TEST_PACKAGES_SLOW)
 tinygo-test-wasip2-fast:
-	$(TINYGO) test -target=wasip2 $(TEST_SKIP_FLAG) $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
+	$(TINYGO) test -target=wasip2 $(TEST_PACKAGES_FAST) ./tests/runtime_wasi
 
 tinygo-test-wasip2-sum-slow:
 	TINYGO=$(TINYGO) \
@@ -548,19 +491,18 @@ tinygo-bench-wasip2:
 tinygo-bench-wasip2-fast:
 	$(TINYGO) test -target wasip2 -bench . $(TEST_PACKAGES_FAST)
 
-# Run tests on riscv-qemu since that one provides a large amount of memory.
-tinygo-test-baremetal:
-	$(TINYGO) test -target riscv-qemu $(TEST_SKIP_FLAG) $(TEST_PACKAGES_BAREMETAL)
-
 # Test external packages in a large corpus.
 test-corpus:
 	CGO_CPPFLAGS="$(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 $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags byollvm -run TestCorpus -short . -corpus=testdata/corpus.yaml
-test-corpus-wasi:
+test-corpus-wasi: wasi-libc
 	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags byollvm -run TestCorpus . -corpus=testdata/corpus.yaml -target=wasip1
-test-corpus-wasip2:
+
-	CGO_CPPFLAGS="$(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=wasip2
+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: testchdir
 testchdir:
@@ -630,29 +572,23 @@ smoketest: testchdir
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=feather-rp2040      examples/device-id
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pico2-ice           examples/blinky1
-	@$(MD5SUM) test.hex
 	# test simulated boards on play.tinygo.org
 ifneq ($(WASM), 0)
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=arduino_uno          examples/blinky1
+	$(TINYGO) build -size short -o test.wasm -tags=arduino              examples/blinky1
 	@$(MD5SUM) test.wasm
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=hifive1b             examples/blinky1
+	$(TINYGO) build -size short -o test.wasm -tags=hifive1b             examples/blinky1
 	@$(MD5SUM) test.wasm
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=reelboard            examples/blinky1
+	$(TINYGO) build -size short -o test.wasm -tags=reelboard            examples/blinky1
 	@$(MD5SUM) test.wasm
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=microbit             examples/microbit-blink
+	$(TINYGO) build -size short -o test.wasm -tags=microbit             examples/microbit-blink
 	@$(MD5SUM) test.wasm
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=circuitplay_express  examples/blinky1
+	$(TINYGO) build -size short -o test.wasm -tags=circuitplay_express  examples/blinky1
 	@$(MD5SUM) test.wasm
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=circuitplay_bluefruit examples/blinky1
+	$(TINYGO) build -size short -o test.wasm -tags=circuitplay_bluefruit examples/blinky1
 	@$(MD5SUM) test.wasm
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=mch2022              examples/machinetest
+	$(TINYGO) build -size short -o test.wasm -tags=mch2022              examples/machinetest
 	@$(MD5SUM) test.wasm
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=gopher_badge         examples/blinky1
+	$(TINYGO) build -size short -o test.wasm -tags=gopher_badge         examples/blinky1
-	@$(MD5SUM) test.wasm
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=pico                 examples/blinky1
-	@$(MD5SUM) test.wasm
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=xiao_esp32s3         examples/blinky1
 	@$(MD5SUM) test.wasm
 endif
 	# test all targets/boards
@@ -666,12 +602,8 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=microbit-v2-s113v7  examples/microbit-blink
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=microbit-v2-s140v7  examples/microbit-blink
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=nrf52840-mdk        examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=btt-skr-pico        examples/uart
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pca10031            examples/blinky1
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=reelboard           examples/blinky1
@@ -808,8 +740,6 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=gopher-badge      examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=gopher-arcade      examples/blinky1
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=ae-rp2040           examples/echo
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=thumby              examples/echo
@@ -820,14 +750,8 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pico-plus2          examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=metro-rp2350        examples/blinky1
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=waveshare-rp2040-tiny examples/echo
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=vicharak_shrike-lite examples/echo
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=xiao-rp2350        examples/blinky1
-	@$(MD5SUM) test.hex
 	# test pwm
 	$(TINYGO) build -size short -o test.hex -target=itsybitsy-m0        examples/pwm
 	@$(MD5SUM) test.hex
@@ -842,10 +766,6 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=feather-nrf52840    examples/usb-midi
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pico    			examples/usb-storage
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=pico2    			examples/usb-storage
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=nrf52840-s140v6-uf2-generic	examples/machinetest
 	@$(MD5SUM) test.hex
 ifneq ($(STM32), 0)
@@ -885,26 +805,18 @@ ifneq ($(STM32), 0)
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=mksnanov3           examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=stm32l0x1           examples/serial
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-uno-q       examples/blinky1
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-uno-q       examples/serial
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-uno-q       examples/blinkm
-	@$(MD5SUM) test.hex
 endif
 	$(TINYGO) build -size short -o test.hex -target=atmega328pb         examples/blinkm
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=atmega1284p         examples/machinetest
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-uno         examples/blinky1
+	$(TINYGO) build -size short -o test.hex -target=arduino             examples/blinky1
 	@$(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-uno         examples/pwm
+	$(TINYGO) build -size short -o test.hex -target=arduino             examples/pwm
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=arduino-uno -scheduler=tasks  examples/blinky1
+	$(TINYGO) build -size short -o test.hex -target=arduino -scheduler=tasks  examples/blinky1
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=arduino-mega1280    examples/blinky1
 	@$(MD5SUM) test.hex
@@ -916,25 +828,13 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=digispark           examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=digispark           examples/pwm
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=digispark           examples/mcp3008
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=digispark -gc=leaking examples/blinky1
 	@$(MD5SUM) test.hex
 ifneq ($(XTENSA), 0)
-	$(TINYGO) build -size short -o test.bin -target=esp32-generic       examples/machinetest
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32c3-generic     examples/machinetest
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32s3-generic     examples/machinetest
-	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=esp32-mini32      	examples/blinky1
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=esp32c3-supermini   examples/blinky1
 	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32c3-supermini   examples/blinkm
-	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=nodemcu             examples/blinky1
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target m5stack-core2       examples/machinetest
@@ -947,39 +847,7 @@ ifneq ($(XTENSA), 0)
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target mch2022             examples/machinetest
 	@$(MD5SUM) test.bin
-	# xiao-esp32s3
-	$(TINYGO) build -size short -o test.bin -target=xiao-esp32s3   		examples/blinky1
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=xiao-esp32s3   		examples/blinkm
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=xiao-esp32s3   		examples/mcp3008
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=xiao-esp32s3   		examples/pwm
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=xiao-esp32s3   		examples/adc
-	@$(MD5SUM) test.bin
-	# esp32s3-supermini
-	$(TINYGO) build -size short -o test.bin -target=esp32s3-supermini	    examples/blinky1
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32s3-supermini	    examples/blinkm
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32s3-supermini	    examples/mcp3008
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32s3-supermini   	examples/adc
-	@$(MD5SUM) test.bin
 endif
-    # esp32c3-supermini
-	$(TINYGO) build -size short -o test.bin -target=esp32c3-supermini	    examples/blinky1
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32c3-supermini	    examples/blinkm
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32c3-supermini	    examples/mcp3008
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32c3-supermini   	examples/pwm
-	@$(MD5SUM) test.bin
-	$(TINYGO) build -size short -o test.bin -target=esp32c3-supermini   	examples/adc
-	@$(MD5SUM) test.bin
-
 	$(TINYGO) build -size short -o test.bin -target=esp-c3-32s-kit      examples/blinky1
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=qtpy-esp32c3        examples/machinetest
@@ -992,7 +860,6 @@ endif
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.bin -target=esp32c3-12f         examples/blinky1
 	@$(MD5SUM) test.bin
-
 	$(TINYGO) build -size short -o test.bin -target=makerfabs-esp32c3spi35 examples/machinetest
 	@$(MD5SUM) test.bin
 	$(TINYGO) build -size short -o test.hex -target=hifive1b            examples/blinky1
@@ -1008,7 +875,7 @@ endif
 	$(TINYGO) build -size short -o test.hex -target=hw-651              examples/machinetest
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=hw-651-s110v8       examples/machinetest
-	@$(MD5SUM) test.hex
+	@$(MD5SUM) test.hex	
 ifneq ($(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
@@ -1041,17 +908,15 @@ endif
 
 
 wasmtest:
-	cd ./tests/wasm && $(GO) test .
+	$(GO) test ./tests/wasm
 
-build/release: tinygo gen-device $(if $(filter 1,$(USE_SYSTEM_BINARYEN)),,binaryen)
+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/bdwgc
 	@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/crt
-	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-crt/math
 	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
+	@mkdir -p build/release/tinygo/lib/mingw-w64/mingw-w64-crt/stdio
 	@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
@@ -1059,8 +924,7 @@ build/release: tinygo gen-device $(if $(filter 1,$(USE_SYSTEM_BINARYEN)),,binary
 	@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/dlmalloc
+	@mkdir -p build/release/tinygo/lib/wasi-libc/libc-bottom-half/headers
-	@mkdir -p build/release/tinygo/lib/wasi-libc/libc-bottom-half
 	@mkdir -p build/release/tinygo/lib/wasi-libc/libc-top-half/musl/arch
 	@mkdir -p build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
 	@mkdir -p build/release/tinygo/lib/wasi-cli/
@@ -1069,7 +933,6 @@ build/release: tinygo gen-device $(if $(filter 1,$(USE_SYSTEM_BINARYEN)),,binary
 ifneq ($(USE_SYSTEM_BINARYEN),1)
 	@cp -p  build/wasm-opt$(EXE)         build/release/tinygo/bin
 endif
-	@cp -rp lib/bdwgc/*                  build/release/tinygo/lib/bdwgc
 	@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
@@ -1083,8 +946,6 @@ endif
 	@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/conf            build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/ctype           build/release/tinygo/lib/musl/src
 	@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
@@ -1099,29 +960,19 @@ endif
 	@cp -rp lib/musl/src/math            build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/misc            build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/multibyte       build/release/tinygo/lib/musl/src
-	@cp -rp lib/musl/src/sched           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/stdlib          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/musl/src/process         build/release/tinygo/lib/musl/src
-	@cp -rp lib/mingw-w64/mingw-w64-crt/crt/pseudo-reloc.c          build/release/tinygo/lib/mingw-w64/mingw-w64-crt/crt
 	@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/gdtoa                       build/release/tinygo/lib/mingw-w64/mingw-w64-crt
-	@cp -rp lib/mingw-w64/mingw-w64-crt/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/advapi32.def.in  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-crt/lib-common/msvcrt.def.in    build/release/tinygo/lib/mingw-w64/mingw-w64-crt/lib-common
+	@cp -rp lib/mingw-w64/mingw-w64-crt/stdio/ucrt_*                build/release/tinygo/lib/mingw-w64/mingw-w64-crt/stdio
-	@cp -rp lib/mingw-w64/mingw-w64-crt/math/x86                    build/release/tinygo/lib/mingw-w64/mingw-w64-crt/math
-	@cp -rp lib/mingw-w64/mingw-w64-crt/misc                        build/release/tinygo/lib/mingw-w64/mingw-w64-crt
-	@cp -rp lib/mingw-w64/mingw-w64-crt/stdio                       build/release/tinygo/lib/mingw-w64/mingw-w64-crt
 	@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/mingw-w64/mingw-w64-headers/include                 build/release/tinygo/lib/mingw-w64/mingw-w64-headers
 	@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
@@ -1131,37 +982,15 @@ endif
 	@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/dlmalloc/src                              build/release/tinygo/lib/wasi-libc/dlmalloc
+	@cp -rp lib/wasi-libc/libc-bottom-half/headers/public           build/release/tinygo/lib/wasi-libc/libc-bottom-half/headers
-	@cp -rp lib/wasi-libc/libc-bottom-half/cloudlibc                build/release/tinygo/lib/wasi-libc/libc-bottom-half
-	@cp -rp lib/wasi-libc/libc-bottom-half/headers                  build/release/tinygo/lib/wasi-libc/libc-bottom-half
-	@cp -rp lib/wasi-libc/libc-bottom-half/sources                  build/release/tinygo/lib/wasi-libc/libc-bottom-half
-	@cp -rp lib/wasi-libc/libc-top-half/headers                     build/release/tinygo/lib/wasi-libc/libc-top-half
 	@cp -rp lib/wasi-libc/libc-top-half/musl/arch/generic           build/release/tinygo/lib/wasi-libc/libc-top-half/musl/arch
 	@cp -rp lib/wasi-libc/libc-top-half/musl/arch/wasm32            build/release/tinygo/lib/wasi-libc/libc-top-half/musl/arch
-	@cp -rp lib/wasi-libc/libc-top-half/musl/include                build/release/tinygo/lib/wasi-libc/libc-top-half/musl
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/conf               build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/dirent             build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/env                build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/errno              build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/exit               build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/fcntl              build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/fenv               build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
 	@cp -rp lib/wasi-libc/libc-top-half/musl/src/include            build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
 	@cp -rp lib/wasi-libc/libc-top-half/musl/src/internal           build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/legacy             build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/locale             build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
 	@cp -rp lib/wasi-libc/libc-top-half/musl/src/math               build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/misc               build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/multibyte          build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/network            build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/stat               build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/stdio              build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/stdlib             build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
 	@cp -rp lib/wasi-libc/libc-top-half/musl/src/string             build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/thread             build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
+	@cp -rp lib/wasi-libc/libc-top-half/musl/include                build/release/tinygo/lib/wasi-libc/libc-top-half/musl
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/time               build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
+	@cp -rp lib/wasi-libc/sysroot                                   build/release/tinygo/lib/wasi-libc/sysroot
-	@cp -rp lib/wasi-libc/libc-top-half/musl/src/unistd             build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@cp -rp lib/wasi-libc/libc-top-half/sources                     build/release/tinygo/lib/wasi-libc/libc-top-half
 	@cp -rp lib/wasi-cli/wit                                        build/release/tinygo/lib/wasi-cli/wit
 	@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
@@ -1186,9 +1015,8 @@ endif
 
 .PHONY: tools
 tools:
-	go generate -tags tools ./
+	cd internal/tools && go generate -tags tools ./
 
-LINTDIRS=src/os/ src/reflect/
 .PHONY: lint
 lint: tools ## Lint source tree
 	revive -version
@@ -1196,10 +1024,7 @@ lint: tools ## Lint source tree
 	# revive.toml isn't flexible enough to filter out just one kind of error from a checker, so do it with grep here.
 	# Can't use grep with friendly formatter.  Plain output isn't too bad, though.
 	# Use 'grep .' to get rid of stray blank line
-	revive -config revive.toml compiler/... $$( find $(LINTDIRS) -type f -name '*.go' ) \
+	revive -config revive.toml compiler/... src/{os,reflect}/*.go | grep -v "should have comment or be unexported" | grep '.' | awk '{print}; END {exit NR>0}'
-		| grep -v "should have comment or be unexported" \
-		| grep '.' \
-		| awk '{print}; END {exit NR>0}'
 
 SPELLDIRSCMD=find . -depth 1 -type d  | egrep -wv '.git|lib|llvm|src'; find src -depth 1 | egrep -wv 'device|internal|net|vendor'; find src/internal -depth 1 -type d | egrep -wv src/internal/wasi
 .PHONY: spell

LICENSE

@@ -1,8 +1,7 @@
-Copyright (c) 2018-2026 The TinyGo Authors. All rights reserved.
+Copyright (c) 2018-2023 The TinyGo Authors. All rights reserved.
 
 TinyGo includes portions of the Go standard library.
-Copyright 2009 The Go Authors. All rights reserved.
+Copyright (c) 2009-2023 The Go Authors. All rights reserved.
-See https://github.com/golang/go/blob/master/LICENSE for license information.
 
 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.

README.md

@@ -6,9 +6,6 @@ TinyGo is a Go compiler intended for use in small places such as microcontroller
 
 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.
 
-> [!IMPORTANT]
-> You can help TinyGo with a financial contribution using OpenCollective. Please see https://opencollective.com/tinygo for more information. Thank you!
-
 ## Embedded
 
 Here is an example program that blinks the built-in LED when run directly on any supported board with onboard LED:
@@ -34,10 +31,10 @@ func main() {
 }
 ```
 
-The above program can be compiled and run without modification on an [Arduino Uno](https://tinygo.org/docs/reference/microcontrollers/boards/arduino-uno), an [Adafruit Circuit Playground Express](https://tinygo.org/docs/reference/microcontrollers/featured/circuitplay-express), a [Seeed Studio XIAO-ESP32S3](https://tinygo.org/docs/reference/microcontrollers/featured/xiao-esp32s3) or any of the many 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:
+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:
 
 ```shell
-tinygo flash -target arduino-uno examples/blinky1
+tinygo flash -target arduino examples/blinky1
 ```
 
 ## WebAssembly
@@ -51,22 +48,20 @@ Here is a small TinyGo program for use by a WASI host application:
 ```go
 package main
 
-//go:wasmexport add
+//go:wasm-module yourmodulename
+//export add
 func add(x, y uint32) uint32 {
 	return x + y
 }
+
+// main is required for the `wasip1` target, even if it isn't used.
+func main() {}
 ```
 
-This compiles the above TinyGo program for use on any WASI Preview 1 runtime:
+This compiles the above TinyGo program for use on any WASI runtime:
 
 ```shell
-tinygo build -buildmode=c-shared -o add.wasm -target=wasip1 add.go
+tinygo build -o main.wasm -target=wasip1 main.go
-```
-
-You can also use the same syntax as Go 1.24+:
-
-```shell
-GOOS=wasip1 GOARCH=wasm tinygo build -buildmode=c-shared -o add.wasm add.go
 ```
 
 ## Installation
@@ -77,7 +72,7 @@ See the [getting started instructions](https://tinygo.org/getting-started/) for
 
 ### Embedded
 
-You can compile TinyGo programs for over 150 different microcontroller boards.
+You can compile TinyGo programs for over 94 different microcontroller boards.
 
 For more information, please see https://tinygo.org/docs/reference/microcontrollers/
 
@@ -142,7 +137,7 @@ Non-goals:
 
 ## Why this project exists
 
-> We never expected Go to be an embedded language, and so it’s got serious problems...
+> 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)
 

builder/ar.go

@@ -3,7 +3,6 @@ package builder
 import (
 	"bytes"
 	"debug/elf"
-	"debug/macho"
 	"debug/pe"
 	"encoding/binary"
 	"errors"
@@ -63,20 +62,6 @@ func makeArchive(arfile *os.File, objs []string) error {
 					fileIndex int
 				}{symbol.Name, i})
 			}
-		} else if dbg, err := macho.NewFile(objfile); err == nil {
-			for _, symbol := range dbg.Symtab.Syms {
-				// See mach-o/nlist.h
-				if symbol.Type&0x0e != 0xe { // (symbol.Type & N_TYPE) != N_SECT
-					continue // undefined symbol
-				}
-				if symbol.Type&0x01 == 0 { // (symbol.Type & N_EXT) == 0
-					continue // internal symbol (static, etc)
-				}
-				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 {

builder/bdwgc.go

@@ -1,91 +0,0 @@
-package builder
-
-// The well-known conservative Boehm-Demers-Weiser GC.
-// This file provides a way to compile this GC for use with TinyGo.
-
-import (
-	"path/filepath"
-	"strings"
-
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-var BoehmGC = Library{
-	name: "bdwgc",
-	cflags: func(target, headerPath string) []string {
-		libdir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/bdwgc")
-		flags := []string{
-			// use a modern environment
-			"-DUSE_MMAP",              // mmap is available
-			"-DUSE_MUNMAP",            // return memory to the OS using munmap
-			"-DGC_BUILTIN_ATOMIC",     // use compiler intrinsics for atomic operations
-			"-DNO_EXECUTE_PERMISSION", // don't make the heap executable
-
-			// specific flags for TinyGo
-			"-DALL_INTERIOR_POINTERS",  // scan interior pointers (needed for Go)
-			"-DIGNORE_DYNAMIC_LOADING", // we don't support dynamic loading at the moment
-			"-DNO_GETCONTEXT",          // musl doesn't support getcontext()
-			"-DGC_DISABLE_INCREMENTAL", // don't mess with SIGSEGV and such
-
-			// Use a minimal environment.
-			"-DNO_MSGBOX_ON_ERROR", // don't call MessageBoxA on Windows
-			"-DDONT_USE_ATEXIT",
-			"-DNO_GETENV",          // smaller binary, more predictable configuration
-			"-DNO_CLOCK",           // don't use system clock
-			"-DNO_DEBUGGING",       // reduce code size
-			"-DGC_NO_FINALIZATION", // finalization is not used at the moment
-
-			// Special flag to work around the lack of __data_start in ld.lld.
-			// TODO: try to fix this in LLVM/lld directly so we don't have to
-			// work around it anymore.
-			"-DGC_DONT_REGISTER_MAIN_STATIC_DATA",
-
-			// Do not scan the stack. We have our own mechanism to do this.
-			"-DSTACK_NOT_SCANNED",
-			"-DNO_PROC_STAT",  // we scan the stack manually (don't read /proc/self/stat on Linux)
-			"-DSTACKBOTTOM=0", // dummy value, we scan the stack manually
-
-			// Assertions can be enabled while debugging GC issues.
-			//"-DGC_ASSERTIONS",
-
-			// We use our own way of dealing with threads (that is a bit hacky).
-			// See src/runtime/gc_boehm.go.
-			//"-DGC_THREADS",
-			//"-DTHREAD_LOCAL_ALLOC",
-
-			"-I" + libdir + "/include",
-		}
-		return flags
-	},
-	needsLibc: true,
-	sourceDir: func() string {
-		return filepath.Join(goenv.Get("TINYGOROOT"), "lib/bdwgc")
-	},
-	librarySources: func(target string, _ bool) ([]string, error) {
-		sources := []string{
-			"allchblk.c",
-			"alloc.c",
-			"blacklst.c",
-			"dbg_mlc.c",
-			"dyn_load.c",
-			"headers.c",
-			"mach_dep.c",
-			"malloc.c",
-			"mark.c",
-			"mark_rts.c",
-			"misc.c",
-			"new_hblk.c",
-			"os_dep.c",
-			"reclaim.c",
-		}
-		if strings.Split(target, "-")[2] == "windows" {
-			// Due to how the linker on Windows works (that doesn't allow
-			// undefined functions), we need to include these extra files.
-			sources = append(sources,
-				"mallocx.c",
-				"ptr_chck.c",
-			)
-		}
-		return sources, nil
-	},
-}

builder/build.go

@@ -14,12 +14,12 @@ import (
 	"fmt"
 	"go/types"
 	"hash/crc32"
+	"io/fs"
 	"math/bits"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"runtime"
-	"slices"
 	"sort"
 	"strconv"
 	"strings"
@@ -149,17 +149,16 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 	var libcDependencies []*compileJob
 	switch config.Target.Libc {
 	case "darwin-libSystem":
-		libcJob := makeDarwinLibSystemJob(config, tmpdir)
+		job := makeDarwinLibSystemJob(config, tmpdir)
-		libcDependencies = append(libcDependencies, libcJob)
+		libcDependencies = append(libcDependencies, job)
 	case "musl":
-		var unlock func()
+		job, unlock, err := libMusl.load(config, tmpdir)
-		libcJob, unlock, err := libMusl.load(config, tmpdir)
 		if err != nil {
 			return BuildResult{}, err
 		}
 		defer unlock()
-		libcDependencies = append(libcDependencies, dummyCompileJob(filepath.Join(filepath.Dir(libcJob.result), "crt1.o")))
+		libcDependencies = append(libcDependencies, dummyCompileJob(filepath.Join(filepath.Dir(job.result), "crt1.o")))
-		libcDependencies = append(libcDependencies, libcJob)
+		libcDependencies = append(libcDependencies, job)
 	case "picolibc":
 		libcJob, unlock, err := libPicolibc.load(config, tmpdir)
 		if err != nil {
@@ -168,12 +167,11 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		defer unlock()
 		libcDependencies = append(libcDependencies, libcJob)
 	case "wasi-libc":
-		libcJob, unlock, err := libWasiLibc.load(config, tmpdir)
+		path := filepath.Join(root, "lib/wasi-libc/sysroot/lib/wasm32-wasi/libc.a")
-		if err != nil {
+		if _, err := os.Stat(path); errors.Is(err, fs.ErrNotExist) {
-			return BuildResult{}, err
+			return BuildResult{}, errors.New("could not find wasi-libc, perhaps you need to run `make wasi-libc`?")
 		}
-		defer unlock()
+		libcDependencies = append(libcDependencies, dummyCompileJob(path))
-		libcDependencies = append(libcDependencies, libcJob)
 	case "wasmbuiltins":
 		libcJob, unlock, err := libWasmBuiltins.load(config, tmpdir)
 		if err != nil {
@@ -182,12 +180,12 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		defer unlock()
 		libcDependencies = append(libcDependencies, libcJob)
 	case "mingw-w64":
-		libcJob, unlock, err := libMinGW.load(config, tmpdir)
+		job, unlock, err := libMinGW.load(config, tmpdir)
 		if err != nil {
 			return BuildResult{}, err
 		}
 		defer unlock()
-		libcDependencies = append(libcDependencies, libcJob)
+		libcDependencies = append(libcDependencies, job)
 		libcDependencies = append(libcDependencies, makeMinGWExtraLibs(tmpdir, config.GOARCH())...)
 	case "":
 		// no library specified, so nothing to do
@@ -215,7 +213,6 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		MaxStackAlloc:      config.MaxStackAlloc(),
 		NeedsStackObjects:  config.NeedsStackObjects(),
 		Debug:              !config.Options.SkipDWARF, // emit DWARF except when -internal-nodwarf is passed
-		Nobounds:           config.Options.Nobounds,
 		PanicStrategy:      config.PanicStrategy(),
 	}
 
@@ -282,13 +279,9 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 				allFiles[file.Name] = append(allFiles[file.Name], file)
 			}
 		}
-		// Sort embedded files by name to maintain output determinism.
+		for name, files := range allFiles {
-		embedNames := make([]string, 0, len(allFiles))
+			name := name
-		for _, files := range allFiles {
+			files := files
-			embedNames = append(embedNames, files[0].Name)
-		}
-		slices.Sort(embedNames)
-		for _, name := range embedNames {
 			job := &compileJob{
 				description: "make object file for " + name,
 				run: func(job *compileJob) error {
@@ -303,7 +296,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 					sum := sha256.Sum256(data)
 					hexSum := hex.EncodeToString(sum[:16])
 
-					for _, file := range allFiles[name] {
+					for _, file := range files {
 						file.Size = uint64(len(data))
 						file.Hash = hexSum
 						if file.NeedsData {
@@ -456,15 +449,8 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 					if global.IsNil() {
 						return errors.New("global not found: " + globalName)
 					}
-					globalType := global.GlobalValueType()
-					if globalType.TypeKind() != llvm.StructTypeKind || globalType.StructName() != "runtime._string" {
-						// Verify this is indeed a string. This is needed so
-						// that makeGlobalsModule can just create the right
-						// globals of string type without checking.
-						return fmt.Errorf("%s: not a string", globalName)
-					}
 					name := global.Name()
-					newGlobal := llvm.AddGlobal(mod, globalType, name+".tmp")
+					newGlobal := llvm.AddGlobal(mod, global.GlobalValueType(), name+".tmp")
 					global.ReplaceAllUsesWith(newGlobal)
 					global.EraseFromParentAsGlobal()
 					newGlobal.SetName(name)
@@ -546,38 +532,12 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 				if err != nil {
 					return fmt.Errorf("failed to load bitcode file: %w", err)
 				}
-				// Resolve duplicate function definitions before linking.
-				// This can happen when a newer Go version adds a function
-				// body in a standard library package that was previously
-				// just a declaration provided by //go:linkname from the
-				// runtime. In that case, keep the existing (runtime)
-				// definition by weakening the new one's linkage so the
-				// LLVM linker discards it in favor of the existing one.
-				for fn := pkgMod.FirstFunction(); !fn.IsNil(); fn = llvm.NextFunction(fn) {
-					if fn.IsDeclaration() {
-						continue
-					}
-					existing := mod.NamedFunction(fn.Name())
-					if existing.IsNil() || existing.IsDeclaration() {
-						continue
-					}
-					fn.SetLinkage(llvm.LinkOnceODRLinkage)
-				}
 				err = llvm.LinkModules(mod, pkgMod)
 				if err != nil {
 					return fmt.Errorf("failed to link module: %w", err)
 				}
 			}
 
-			// Insert values from -ldflags="-X ..." into the IR.
-			// This is a separate module, so that the "runtime._string" type
-			// doesn't need to match precisely. LLVM tends to rename that type
-			// sometimes, leading to errors. But linking in a separate module
-			// works fine. See:
-			// https://github.com/tinygo-org/tinygo/issues/4810
-			globalsMod := makeGlobalsModule(ctx, globalValues, machine)
-			llvm.LinkModules(mod, globalsMod)
-
 			// Create runtime.initAll function that calls the runtime
 			// initializer of each package.
 			llvmInitFn := mod.NamedFunction("runtime.initAll")
@@ -630,7 +590,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 
 			// Run all optimization passes, which are much more effective now
 			// that the optimizer can see the whole program at once.
-			err := optimizeProgram(mod, config)
+			err := optimizeProgram(mod, config, globalValues)
 			if err != nil {
 				return err
 			}
@@ -733,16 +693,6 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		linkerDependencies = append(linkerDependencies, job)
 	}
 
-	// The Boehm collector is stored in a separate C library.
-	if config.GC() == "boehm" {
-		job, unlock, err := BoehmGC.load(config, tmpdir)
-		if err != nil {
-			return BuildResult{}, err
-		}
-		defer unlock()
-		linkerDependencies = append(linkerDependencies, job)
-	}
-
 	// Add jobs to compile extra files. These files are in C or assembly and
 	// contain things like the interrupt vector table and low level operations
 	// such as stack switching.
@@ -1064,11 +1014,11 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		if err != nil {
 			return result, err
 		}
-	case "esp32", "esp32-img", "esp32c3", "esp32s3", "esp8266":
+	case "esp32", "esp32-img", "esp32c3", "esp8266":
 		// Special format for the ESP family of chips (parsed by the ROM
 		// bootloader).
 		result.Binary = filepath.Join(tmpdir, "main"+outext)
-		err := makeESPFirmwareImage(result.Executable, result.Binary, outputBinaryFormat)
+		err := makeESPFirmareImage(result.Executable, result.Binary, outputBinaryFormat)
 		if err != nil {
 			return result, err
 		}
@@ -1195,7 +1145,7 @@ func createEmbedObjectFile(data, hexSum, sourceFile, sourceDir, tmpdir string, c
 // optimizeProgram runs a series of optimizations and transformations that are
 // needed to convert a program to its final form. Some transformations are not
 // optional and must be run as the compiler expects them to run.
-func optimizeProgram(mod llvm.Module, config *compileopts.Config) error {
+func optimizeProgram(mod llvm.Module, config *compileopts.Config, globalValues map[string]map[string]string) error {
 	err := interp.Run(mod, config.Options.InterpTimeout, config.DumpSSA())
 	if err != nil {
 		return err
@@ -1213,6 +1163,12 @@ func optimizeProgram(mod llvm.Module, config *compileopts.Config) error {
 		}
 	}
 
+	// Insert values from -ldflags="-X ..." into the IR.
+	err = setGlobalValues(mod, globalValues)
+	if err != nil {
+		return err
+	}
+
 	// Run most of the whole-program optimizations (including the whole
 	// O0/O1/O2/Os/Oz optimization pipeline).
 	errs := transform.Optimize(mod, config)
@@ -1226,19 +1182,10 @@ func optimizeProgram(mod llvm.Module, config *compileopts.Config) error {
 	return nil
 }
 
-func makeGlobalsModule(ctx llvm.Context, globals map[string]map[string]string, machine llvm.TargetMachine) llvm.Module {
+// setGlobalValues sets the global values from the -ldflags="-X ..." compiler
-	mod := ctx.NewModule("cmdline-globals")
+// option in the given module. An error may be returned if the global is not of
-	targetData := machine.CreateTargetData()
+// the expected type.
-	defer targetData.Dispose()
+func setGlobalValues(mod llvm.Module, globals map[string]map[string]string) error {
-	mod.SetDataLayout(targetData.String())
-
-	stringType := ctx.StructCreateNamed("runtime._string")
-	uintptrType := ctx.IntType(targetData.PointerSize() * 8)
-	stringType.StructSetBody([]llvm.Type{
-		llvm.PointerType(ctx.Int8Type(), 0),
-		uintptrType,
-	}, false)
-
 	var pkgPaths []string
 	for pkgPath := range globals {
 		pkgPaths = append(pkgPaths, pkgPath)
@@ -1254,6 +1201,24 @@ func makeGlobalsModule(ctx llvm.Context, globals map[string]map[string]string, m
 		for _, name := range names {
 			value := pkg[name]
 			globalName := pkgPath + "." + name
+			global := mod.NamedGlobal(globalName)
+			if global.IsNil() || !global.Initializer().IsNil() {
+				// The global either does not exist (optimized away?) or has
+				// some value, in which case it has already been initialized at
+				// package init time.
+				continue
+			}
+
+			// A strin is a {ptr, len} pair. We need these types to build the
+			// initializer.
+			initializerType := global.GlobalValueType()
+			if initializerType.TypeKind() != llvm.StructTypeKind || initializerType.StructName() == "" {
+				return fmt.Errorf("%s: not a string", globalName)
+			}
+			elementTypes := initializerType.StructElementTypes()
+			if len(elementTypes) != 2 {
+				return fmt.Errorf("%s: not a string", globalName)
+			}
 
 			// Create a buffer for the string contents.
 			bufInitializer := mod.Context().ConstString(value, false)
@@ -1264,20 +1229,22 @@ func makeGlobalsModule(ctx llvm.Context, globals map[string]map[string]string, m
 			buf.SetLinkage(llvm.PrivateLinkage)
 
 			// Create the string value, which is a {ptr, len} pair.
-			length := llvm.ConstInt(uintptrType, uint64(len(value)), false)
+			zero := llvm.ConstInt(mod.Context().Int32Type(), 0, false)
-			initializer := llvm.ConstNamedStruct(stringType, []llvm.Value{
+			ptr := llvm.ConstGEP(bufInitializer.Type(), buf, []llvm.Value{zero, zero})
-				buf,
+			if ptr.Type() != elementTypes[0] {
+				return fmt.Errorf("%s: not a string", globalName)
+			}
+			length := llvm.ConstInt(elementTypes[1], uint64(len(value)), false)
+			initializer := llvm.ConstNamedStruct(initializerType, []llvm.Value{
+				ptr,
 				length,
 			})
 
-			// Create the string global.
+			// Set the initializer. No initializer should be set at this point.
-			global := llvm.AddGlobal(mod, stringType, globalName)
 			global.SetInitializer(initializer)
-			global.SetAlignment(targetData.PrefTypeAlignment(stringType))
 		}
 	}
-
+	return nil
-	return mod
 }
 
 // functionStackSizes keeps stack size information about a single function

builder/builder_test.go

@@ -28,7 +28,6 @@ func TestClangAttributes(t *testing.T) {
 		"cortex-m4",
 		"cortex-m7",
 		"esp32c3",
-		"esp32s3",
 		"fe310",
 		"gameboy-advance",
 		"k210",
@@ -68,9 +67,9 @@ func TestClangAttributes(t *testing.T) {
 		{GOOS: "linux", GOARCH: "mipsle", GOMIPS: "softfloat"},
 		{GOOS: "darwin", GOARCH: "amd64"},
 		{GOOS: "darwin", GOARCH: "arm64"},
-		{GOOS: "windows", GOARCH: "386"},
 		{GOOS: "windows", GOARCH: "amd64"},
 		{GOOS: "windows", GOARCH: "arm64"},
+		{GOOS: "wasip1", GOARCH: "wasm"},
 	} {
 		name := "GOOS=" + options.GOOS + ",GOARCH=" + options.GOARCH
 		if options.GOARCH == "arm" {

builder/builtins.go

@@ -3,7 +3,6 @@ package builder
 import (
 	"os"
 	"path/filepath"
-	"strings"
 
 	"github.com/tinygo-org/tinygo/compileopts"
 	"github.com/tinygo-org/tinygo/goenv"
@@ -202,11 +201,6 @@ var avrBuiltins = []string{
 	"avr/udivmodqi4.S",
 }
 
-// Builtins needed specifically for windows/386.
-var windowsI386Builtins = []string{
-	"i386/chkstk.S", // also _alloca
-}
-
 // libCompilerRT 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.
@@ -226,7 +220,7 @@ var libCompilerRT = Library{
 		// Development build.
 		return filepath.Join(goenv.Get("TINYGOROOT"), "lib/compiler-rt-builtins")
 	},
-	librarySources: func(target string, _ bool) ([]string, error) {
+	librarySources: func(target string) ([]string, error) {
 		builtins := append([]string{}, genericBuiltins...) // copy genericBuiltins
 		switch compileopts.CanonicalArchName(target) {
 		case "arm":
@@ -235,10 +229,6 @@ var libCompilerRT = Library{
 			builtins = append(builtins, avrBuiltins...)
 		case "x86_64", "aarch64", "riscv64": // any 64-bit arch
 			builtins = append(builtins, genericBuiltins128...)
-		case "i386":
-			if strings.Split(target, "-")[2] == "windows" {
-				builtins = append(builtins, windowsI386Builtins...)
-			}
 		}
 		return builtins, nil
 	},

builder/cc1as.cpp

@@ -144,6 +144,8 @@ bool AssemblerInvocation::CreateFromArgs(AssemblerInvocation &Opts,
             .Default(llvm::DebugCompressionType::None);
   }
 
+  Opts.RelaxELFRelocations = !Args.hasArg(OPT_mrelax_relocations_no);
+  Opts.SSE2AVX = Args.hasArg(OPT_msse2avx);
   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);
@@ -234,9 +236,6 @@ bool AssemblerInvocation::CreateFromArgs(AssemblerInvocation &Opts,
   Opts.EmitCompactUnwindNonCanonical =
       Args.hasArg(OPT_femit_compact_unwind_non_canonical);
   Opts.Crel = Args.hasArg(OPT_crel);
-  Opts.ImplicitMapsyms = Args.hasArg(OPT_mmapsyms_implicit);
-  Opts.X86RelaxRelocations = !Args.hasArg(OPT_mrelax_relocations_no);
-  Opts.X86Sse2Avx = Args.hasArg(OPT_msse2avx);
 
   Opts.AsSecureLogFile = Args.getLastArgValue(OPT_as_secure_log_file);
 
@@ -295,9 +294,8 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
   MCOptions.EmitCompactUnwindNonCanonical = Opts.EmitCompactUnwindNonCanonical;
   MCOptions.MCSaveTempLabels = Opts.SaveTemporaryLabels;
   MCOptions.Crel = Opts.Crel;
-  MCOptions.ImplicitMapSyms = Opts.ImplicitMapsyms;
+  MCOptions.X86RelaxRelocations = Opts.RelaxELFRelocations;
-  MCOptions.X86RelaxRelocations = Opts.X86RelaxRelocations;
+  MCOptions.X86Sse2Avx = Opts.SSE2AVX;
-  MCOptions.X86Sse2Avx = Opts.X86Sse2Avx;
   MCOptions.CompressDebugSections = Opts.CompressDebugSections;
   MCOptions.AsSecureLogFile = Opts.AsSecureLogFile;
 
@@ -345,6 +343,10 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
   // 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);
+  if (!Opts.DarwinTargetVariantSDKVersion.empty())
+    MOFI->setDarwinTargetVariantSDKVersion(Opts.DarwinTargetVariantSDKVersion);
   Ctx.setObjectFileInfo(MOFI.get());
 
   if (Opts.GenDwarfForAssembly)
@@ -426,13 +428,6 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
     Str.reset(TheTarget->createMCObjectStreamer(
         T, Ctx, std::move(MAB), std::move(OW), std::move(CE), *STI));
     Str.get()->initSections(Opts.NoExecStack, *STI);
-    if (T.isOSBinFormatMachO() && T.isOSDarwin()) {
-      Triple *TVT = Opts.DarwinTargetVariantTriple
-                        ? &*Opts.DarwinTargetVariantTriple
-                        : nullptr;
-      Str->emitVersionForTarget(T, VersionTuple(), TVT,
-                                Opts.DarwinTargetVariantSDKVersion);
-    }
   }
 
   // When -fembed-bitcode is passed to clang_as, a 1-byte marker

builder/cc1as.h

@@ -45,6 +45,10 @@ struct AssemblerInvocation {
   LLVM_PREFERRED_TYPE(bool)
   unsigned GenDwarfForAssembly : 1;
   LLVM_PREFERRED_TYPE(bool)
+  unsigned RelaxELFRelocations : 1;
+  LLVM_PREFERRED_TYPE(bool)
+  unsigned SSE2AVX : 1;
+  LLVM_PREFERRED_TYPE(bool)
   unsigned Dwarf64 : 1;
   unsigned DwarfVersion;
   std::string DwarfDebugFlags;
@@ -107,19 +111,12 @@ struct AssemblerInvocation {
   EmitDwarfUnwindType EmitDwarfUnwind;
 
   // Whether to emit compact-unwind for non-canonical entries.
-  // Note: maybe overridden by other constraints.
+  // Note: maybe overriden by other constraints.
   LLVM_PREFERRED_TYPE(bool)
   unsigned EmitCompactUnwindNonCanonical : 1;
 
   LLVM_PREFERRED_TYPE(bool)
   unsigned Crel : 1;
-  LLVM_PREFERRED_TYPE(bool)
-  unsigned ImplicitMapsyms : 1;
-
-  LLVM_PREFERRED_TYPE(bool)
-  unsigned X86RelaxRelocations : 1;
-  LLVM_PREFERRED_TYPE(bool)
-  unsigned X86Sse2Avx : 1;
 
   /// The name of the relocation model to use.
   std::string RelocationModel;
@@ -151,6 +148,7 @@ public:
     ShowInst = 0;
     ShowEncoding = 0;
     RelaxAll = 0;
+    SSE2AVX = 0;
     NoExecStack = 0;
     FatalWarnings = 0;
     NoWarn = 0;
@@ -162,9 +160,6 @@ public:
     EmitDwarfUnwind = EmitDwarfUnwindType::Default;
     EmitCompactUnwindNonCanonical = false;
     Crel = false;
-    ImplicitMapsyms = 0;
-    X86RelaxRelocations = 0;
-    X86Sse2Avx = 0;
   }
 
   static bool CreateFromArgs(AssemblerInvocation &Res,

builder/clang.cpp

@@ -60,7 +60,7 @@ bool tinygo_clang_driver(int argc, char **argv) {
 			}
 
 			// Create the actual diagnostics engine.
-			Clang->createDiagnostics(*llvm::vfs::getRealFileSystem());
+			Clang->createDiagnostics();
 			if (!Clang->hasDiagnostics()) {
 				return false;
 			}

builder/config.go

@@ -26,20 +26,17 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 
 	// Version range supported by TinyGo.
 	const minorMin = 19
-	const minorMax = 26
+	const minorMax = 24
 
 	// Check that we support this Go toolchain version.
 	gorootMajor, gorootMinor, err := goenv.GetGorootVersion()
 	if err != nil {
 		return nil, err
 	}
-
+	if gorootMajor != 1 || gorootMinor < minorMin || gorootMinor > minorMax {
-	if options.GoCompatibility {
+		// Note: when this gets updated, also update the Go compatibility matrix:
-		if gorootMajor != 1 || gorootMinor < minorMin || gorootMinor > minorMax {
+		// https://github.com/tinygo-org/tinygo-site/blob/dev/content/docs/reference/go-compat-matrix.md
-			// Note: when this gets updated, also update the Go compatibility matrix:
+		return nil, fmt.Errorf("requires go version 1.%d through 1.%d, got go%d.%d", minorMin, minorMax, gorootMajor, gorootMinor)
-			// https://github.com/tinygo-org/tinygo-site/blob/dev/content/docs/reference/go-compat-matrix.md
-			return nil, fmt.Errorf("requires go version 1.%d through 1.%d, got go%d.%d", minorMin, minorMax, gorootMajor, gorootMinor)
-		}
 	}
 
 	// Check that the Go toolchain version isn't too new, if we haven't been

builder/esp.go

@@ -23,7 +23,7 @@ type espImageSegment struct {
 	data []byte
 }
 
-// makeESPFirmwareImage converts an input ELF file to an image file for an ESP32 or
+// makeESPFirmareImage 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.
 //
@@ -31,7 +31,7 @@ type espImageSegment struct {
 // 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 makeESPFirmwareImage(infile, outfile, format string) error {
+func makeESPFirmareImage(infile, outfile, format string) error {
 	inf, err := elf.Open(infile)
 	if err != nil {
 		return err
@@ -100,12 +100,11 @@ func makeESPFirmwareImage(infile, outfile, format string) error {
 	chip_id := map[string]uint16{
 		"esp32":   0x0000,
 		"esp32c3": 0x0005,
-		"esp32s3": 0x0009,
 	}[chip]
 
 	// Image header.
 	switch chip {
-	case "esp32", "esp32c3", "esp32s3":
+	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

builder/library.go

@@ -15,9 +15,6 @@ import (
 
 // Library is a container for information about a single C library, such as a
 // compiler runtime or libc.
-//
-// Note: whenever a library gets changed, the version in compileopts/config.go
-// probably also needs to be incremented.
 type Library struct {
 	// The library name, such as compiler-rt or picolibc.
 	name string
@@ -28,17 +25,11 @@ type Library struct {
 	// cflags returns the C flags specific to this library
 	cflags func(target, headerPath string) []string
 
-	// cflagsForFile returns additional C flags for a particular source file.
-	cflagsForFile func(path string) []string
-
-	// needsLibc is set to true if this library needs libc headers.
-	needsLibc bool
-
 	// The source directory.
 	sourceDir func() string
 
 	// The source files, relative to sourceDir.
-	librarySources func(target string, libcNeedsMalloc bool) ([]string, error)
+	librarySources func(target string) ([]string, error)
 
 	// The source code for the crt1.o file, relative to sourceDir.
 	crt1Source string
@@ -53,8 +44,13 @@ type Library struct {
 // 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 := config.LibraryPath(l.name)
+	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.
@@ -167,9 +163,9 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 		// double.
 		args = append(args, "-mdouble=64")
 	case "riscv32":
-		args = append(args, "-march="+riscvMarch(config, "rv32imac"), "-fforce-enable-int128")
+		args = append(args, "-march=rv32imac", "-fforce-enable-int128")
 	case "riscv64":
-		args = append(args, "-march="+riscvMarch(config, "rv64gc"))
+		args = append(args, "-march=rv64gc")
 	case "mips":
 		args = append(args, "-fno-pic")
 	}
@@ -185,9 +181,6 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 			args = append(args, "-mfpu=vfpv2")
 		}
 	}
-	if l.needsLibc {
-		args = append(args, config.LibcCFlags()...)
-	}
 
 	var once sync.Once
 
@@ -226,13 +219,12 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 
 	// 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, config.LibcNeedsMalloc())
+	paths, err := l.librarySources(target)
 	if err != nil {
 		return nil, nil, err
 	}
 	for _, path := range paths {
 		// Strip leading "../" parts off the path.
-		path := path
 		cleanpath := path
 		for strings.HasPrefix(cleanpath, "../") {
 			cleanpath = cleanpath[3:]
@@ -241,14 +233,11 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 		objpath := filepath.Join(dir, cleanpath+".o")
 		os.MkdirAll(filepath.Dir(objpath), 0o777)
 		objs = append(objs, objpath)
-		objfile := &compileJob{
+		job.dependencies = append(job.dependencies, &compileJob{
 			description: "compile " + srcpath,
 			run: func(*compileJob) error {
 				var compileArgs []string
 				compileArgs = append(compileArgs, args...)
-				if l.cflagsForFile != nil {
-					compileArgs = append(compileArgs, l.cflagsForFile(path)...)
-				}
 				compileArgs = append(compileArgs, "-o", objpath, srcpath)
 				if config.Options.PrintCommands != nil {
 					config.Options.PrintCommands("clang", compileArgs...)
@@ -259,8 +248,7 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 				}
 				return nil
 			},
-		}
+		})
-		job.dependencies = append(job.dependencies, objfile)
 	}
 
 	// Create crt1.o job, if needed.
@@ -269,7 +257,7 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 	// won't make much of a difference in speed).
 	if l.crt1Source != "" {
 		srcpath := filepath.Join(sourceDir, l.crt1Source)
-		crt1Job := &compileJob{
+		job.dependencies = append(job.dependencies, &compileJob{
 			description: "compile " + srcpath,
 			run: func(*compileJob) error {
 				var compileArgs []string
@@ -289,8 +277,7 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 				}
 				return os.Rename(tmpfile.Name(), filepath.Join(outdir, "crt1.o"))
 			},
-		}
+		})
-		job.dependencies = append(job.dependencies, crt1Job)
 	}
 
 	ok = true
@@ -298,17 +285,3 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 		once.Do(unlock)
 	}, nil
 }
-
-// riscvMarch returns the -march value for RISC-V library compilation.
-// It extracts the value from the target's cflags if present, otherwise
-// falls back to the provided default. This ensures libraries are compiled
-// with the correct ISA extensions for each target (e.g. rv32imc for
-// ESP32-C3 which lacks the atomic extension).
-func riscvMarch(config *compileopts.Config, defaultMarch string) string {
-	for _, flag := range config.Target.CFlags {
-		if strings.HasPrefix(flag, "-march=") {
-			return flag[len("-march="):]
-		}
-	}
-	return defaultMarch
-}

builder/mingw-w64.go

@@ -30,62 +30,25 @@ var libMinGW = Library{
 	sourceDir: func() string { return filepath.Join(goenv.Get("TINYGOROOT"), "lib/mingw-w64") },
 	cflags: func(target, headerPath string) []string {
 		mingwDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/mingw-w64")
-		flags := []string{
+		return []string{
 			"-nostdlibinc",
-			"-isystem", mingwDir + "/mingw-w64-crt/include",
 			"-isystem", mingwDir + "/mingw-w64-headers/crt",
-			"-isystem", mingwDir + "/mingw-w64-headers/include",
 			"-I", mingwDir + "/mingw-w64-headers/defaults/include",
 			"-I" + headerPath,
 		}
-		if strings.Split(target, "-")[0] == "i386" {
-			flags = append(flags,
-				"-D__MSVCRT_VERSION__=0x700", // Microsoft Visual C++ .NET 2002
-				"-D_WIN32_WINNT=0x0501",      // target Windows XP
-				"-D_CRTBLD",
-				"-Wno-pragma-pack",
-			)
-		}
-		return flags
 	},
-	librarySources: func(target string, _ bool) ([]string, error) {
+	librarySources: func(target string) ([]string, error) {
 		// These files are needed so that printf and the like are supported.
-		var sources []string
+		sources := []string{
-		if strings.Split(target, "-")[0] == "i386" {
+			"mingw-w64-crt/stdio/ucrt_fprintf.c",
-			// Old 32-bit x86 systems use msvcrt.dll.
+			"mingw-w64-crt/stdio/ucrt_fwprintf.c",
-			sources = []string{
+			"mingw-w64-crt/stdio/ucrt_printf.c",
-				"mingw-w64-crt/crt/pseudo-reloc.c",
+			"mingw-w64-crt/stdio/ucrt_snprintf.c",
-				"mingw-w64-crt/gdtoa/dmisc.c",
+			"mingw-w64-crt/stdio/ucrt_sprintf.c",
-				"mingw-w64-crt/gdtoa/gdtoa.c",
+			"mingw-w64-crt/stdio/ucrt_vfprintf.c",
-				"mingw-w64-crt/gdtoa/gmisc.c",
+			"mingw-w64-crt/stdio/ucrt_vprintf.c",
-				"mingw-w64-crt/gdtoa/misc.c",
+			"mingw-w64-crt/stdio/ucrt_vsnprintf.c",
-				"mingw-w64-crt/math/x86/exp2.S",
+			"mingw-w64-crt/stdio/ucrt_vsprintf.c",
-				"mingw-w64-crt/math/x86/trunc.S",
-				"mingw-w64-crt/misc/___mb_cur_max_func.c",
-				"mingw-w64-crt/misc/lc_locale_func.c",
-				"mingw-w64-crt/misc/mbrtowc.c",
-				"mingw-w64-crt/misc/strnlen.c",
-				"mingw-w64-crt/misc/wcrtomb.c",
-				"mingw-w64-crt/misc/wcsnlen.c",
-				"mingw-w64-crt/stdio/acrt_iob_func.c",
-				"mingw-w64-crt/stdio/mingw_lock.c",
-				"mingw-w64-crt/stdio/mingw_pformat.c",
-				"mingw-w64-crt/stdio/mingw_vfprintf.c",
-				"mingw-w64-crt/stdio/mingw_vsnprintf.c",
-			}
-		} else {
-			// Anything somewhat modern (amd64, arm64) uses UCRT.
-			sources = []string{
-				"mingw-w64-crt/stdio/ucrt_fprintf.c",
-				"mingw-w64-crt/stdio/ucrt_fwprintf.c",
-				"mingw-w64-crt/stdio/ucrt_printf.c",
-				"mingw-w64-crt/stdio/ucrt_snprintf.c",
-				"mingw-w64-crt/stdio/ucrt_sprintf.c",
-				"mingw-w64-crt/stdio/ucrt_vfprintf.c",
-				"mingw-w64-crt/stdio/ucrt_vprintf.c",
-				"mingw-w64-crt/stdio/ucrt_vsnprintf.c",
-				"mingw-w64-crt/stdio/ucrt_vsprintf.c",
-			}
 		}
 		return sources, nil
 	},
@@ -100,41 +63,27 @@ var libMinGW = Library{
 func makeMinGWExtraLibs(tmpdir, goarch string) []*compileJob {
 	var jobs []*compileJob
 	root := goenv.Get("TINYGOROOT")
-	var libs []string
+	// Normally all the api-ms-win-crt-*.def files are all compiled to a single
-	if goarch == "386" {
+	// .lib file. But to simplify things, we're going to leave them as separate
-		libs = []string{
+	// files.
-			// x86 uses msvcrt.dll instead of UCRT for compatibility with old
+	for _, name := range []string{
-			// Windows versions.
+		"kernel32.def.in",
-			"advapi32.def.in",
+		"api-ms-win-crt-conio-l1-1-0.def",
-			"kernel32.def.in",
+		"api-ms-win-crt-convert-l1-1-0.def.in",
-			"msvcrt.def.in",
+		"api-ms-win-crt-environment-l1-1-0.def",
-		}
+		"api-ms-win-crt-filesystem-l1-1-0.def",
-	} else {
+		"api-ms-win-crt-heap-l1-1-0.def",
-		// Use the modernized UCRT on new systems.
+		"api-ms-win-crt-locale-l1-1-0.def",
-		// Normally all the api-ms-win-crt-*.def files are all compiled to a
+		"api-ms-win-crt-math-l1-1-0.def.in",
-		// single .lib file. But to simplify things, we're going to leave them
+		"api-ms-win-crt-multibyte-l1-1-0.def",
-		// as separate files.
+		"api-ms-win-crt-private-l1-1-0.def.in",
-		libs = []string{
+		"api-ms-win-crt-process-l1-1-0.def",
-			"advapi32.def.in",
+		"api-ms-win-crt-runtime-l1-1-0.def.in",
-			"kernel32.def.in",
+		"api-ms-win-crt-stdio-l1-1-0.def",
-			"api-ms-win-crt-conio-l1-1-0.def",
+		"api-ms-win-crt-string-l1-1-0.def",
-			"api-ms-win-crt-convert-l1-1-0.def.in",
+		"api-ms-win-crt-time-l1-1-0.def",
-			"api-ms-win-crt-environment-l1-1-0.def",
+		"api-ms-win-crt-utility-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",
-		}
-	}
-	for _, name := range libs {
 		outpath := filepath.Join(tmpdir, filepath.Base(name)+".lib")
 		inpath := filepath.Join(root, "lib/mingw-w64/mingw-w64-crt/lib-common/"+name)
 		job := &compileJob{
@@ -144,9 +93,6 @@ func makeMinGWExtraLibs(tmpdir, goarch string) []*compileJob {
 				defpath := inpath
 				var archDef, emulation string
 				switch goarch {
-				case "386":
-					archDef = "-DDEF_I386"
-					emulation = "i386pe"
 				case "amd64":
 					archDef = "-DDEF_X64"
 					emulation = "i386pep"

builder/musl.go

@@ -12,45 +12,6 @@ import (
 	"github.com/tinygo-org/tinygo/goenv"
 )
 
-// Create the alltypes.h file from the appropriate alltypes.h.in files.
-func buildMuslAllTypes(arch, muslDir, outputBitsDir string) error {
-	// Create the file alltypes.h.
-	f, err := os.Create(filepath.Join(outputBitsDir, "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)
-			}
-			_, err := f.WriteString(line + "\n")
-			if err != nil {
-				return err
-			}
-		}
-	}
-	return f.Close()
-}
-
 var libMusl = Library{
 	name: "musl",
 	makeHeaders: func(target, includeDir string) error {
@@ -63,13 +24,41 @@ var libMusl = Library{
 		arch := compileopts.MuslArchitecture(target)
 		muslDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib", "musl")
 
-		err = buildMuslAllTypes(arch, muslDir, bits)
+		// 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"))
+		f, err = os.Create(filepath.Join(bits, "syscall.h"))
 		if err != nil {
 			return err
 		}
@@ -121,36 +110,29 @@ var libMusl = Library{
 		return cflags
 	},
 	sourceDir: func() string { return filepath.Join(goenv.Get("TINYGOROOT"), "lib/musl/src") },
-	librarySources: func(target string, _ bool) ([]string, error) {
+	librarySources: func(target string) ([]string, error) {
 		arch := compileopts.MuslArchitecture(target)
 		globs := []string{
-			"conf/*.c",
-			"ctype/*.c",
 			"env/*.c",
 			"errno/*.c",
 			"exit/*.c",
 			"fcntl/*.c",
 			"internal/defsysinfo.c",
-			"internal/intscan.c",
 			"internal/libc.c",
-			"internal/shgetc.c",
 			"internal/syscall_ret.c",
 			"internal/vdso.c",
 			"legacy/*.c",
 			"locale/*.c",
 			"linux/*.c",
-			"locale/*.c",
 			"malloc/*.c",
 			"malloc/mallocng/*.c",
 			"mman/*.c",
 			"math/*.c",
 			"misc/*.c",
 			"multibyte/*.c",
-			"sched/*.c",
 			"signal/" + arch + "/*.s",
 			"signal/*.c",
 			"stdio/*.c",
-			"stdlib/*.c",
 			"string/*.c",
 			"thread/" + arch + "/*.s",
 			"thread/*.c",

builder/picolibc.go

@@ -43,7 +43,7 @@ var libPicolibc = Library{
 		}
 	},
 	sourceDir: func() string { return filepath.Join(goenv.Get("TINYGOROOT"), "lib/picolibc/newlib") },
-	librarySources: func(target string, _ bool) ([]string, error) {
+	librarySources: func(target string) ([]string, error) {
 		sources := append([]string(nil), picolibcSources...)
 		if !strings.HasPrefix(target, "avr") {
 			// Small chips without long jumps can't compile many files (printf,

builder/sizes.go

@@ -490,7 +490,7 @@ func loadProgramSize(path string, packagePathMap map[string]string) (*programSiz
 				continue
 			}
 			if section.Type == elf.SHT_NOBITS {
-				if strings.HasPrefix(section.Name, ".stack") {
+				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
@@ -954,11 +954,7 @@ func findPackagePath(path string, packagePathMap map[string]string) (packagePath
 			libPath := strings.TrimPrefix(path, filepath.Join(goenv.Get("TINYGOROOT"), "lib")+string(os.PathSeparator))
 			parts := strings.SplitN(libPath, string(os.PathSeparator), 2)
 			packagePath = "C " + parts[0]
-			if len(parts) > 1 {
+			filename = parts[1]
-				filename = parts[1]
-			} else {
-				filename = parts[0]
-			}
 		} else if prefix := filepath.Join(goenv.Get("TINYGOROOT"), "llvm-project", "compiler-rt"); strings.HasPrefix(path, prefix) {
 			packagePath = "C compiler-rt"
 			filename = strings.TrimPrefix(path, prefix+string(os.PathSeparator))

builder/sizes_test.go

@@ -42,9 +42,9 @@ func TestBinarySize(t *testing.T) {
 	// This is a small number of very diverse targets that we want to test.
 	tests := []sizeTest{
 		// microcontrollers
-		{"hifive1b", "examples/echo", 3680, 280, 0, 2252},
+		{"hifive1b", "examples/echo", 4560, 280, 0, 2268},
-		{"microbit", "examples/serial", 2694, 342, 8, 2248},
+		{"microbit", "examples/serial", 2916, 388, 8, 2272},
-		{"wioterminal", "examples/pininterrupt", 7074, 1510, 120, 7248},
+		{"wioterminal", "examples/pininterrupt", 7359, 1489, 116, 6912},
 
 		// TODO: also check wasm. Right now this is difficult, because
 		// wasm binaries are run through wasm-opt and therefore the

builder/wasilibc.go

@@ -1,284 +0,0 @@
-package builder
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"strings"
-
-	"github.com/tinygo-org/tinygo/goenv"
-)
-
-var libWasiLibc = Library{
-	name: "wasi-libc",
-	makeHeaders: func(target, includeDir string) error {
-		bits := filepath.Join(includeDir, "bits")
-		err := os.Mkdir(bits, 0777)
-		if err != nil {
-			return err
-		}
-
-		muslDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib", "wasi-libc/libc-top-half/musl")
-		err = buildMuslAllTypes("wasm32", muslDir, bits)
-		if err != nil {
-			return err
-		}
-
-		// See MUSL_OMIT_HEADERS in the Makefile.
-		omitHeaders := map[string]struct{}{
-			"syslog.h":   {},
-			"wait.h":     {},
-			"ucontext.h": {},
-			"paths.h":    {},
-			"utmp.h":     {},
-			"utmpx.h":    {},
-			"lastlog.h":  {},
-			"elf.h":      {},
-			"link.h":     {},
-			"pwd.h":      {},
-			"shadow.h":   {},
-			"grp.h":      {},
-			"mntent.h":   {},
-			"netdb.h":    {},
-			"resolv.h":   {},
-			"pty.h":      {},
-			"dlfcn.h":    {},
-			"setjmp.h":   {},
-			"ulimit.h":   {},
-			"wordexp.h":  {},
-			"spawn.h":    {},
-			"termios.h":  {},
-			"libintl.h":  {},
-			"aio.h":      {},
-
-			"stdarg.h": {},
-			"stddef.h": {},
-
-			"pthread.h": {},
-		}
-
-		for _, glob := range [][2]string{
-			{"libc-bottom-half/headers/public/*.h", ""},
-			{"libc-bottom-half/headers/public/wasi/*.h", "wasi"},
-			{"libc-top-half/musl/arch/wasm32/bits/*.h", "bits"},
-			{"libc-top-half/musl/include/*.h", ""},
-			{"libc-top-half/musl/include/netinet/*.h", "netinet"},
-			{"libc-top-half/musl/include/sys/*.h", "sys"},
-		} {
-			matches, _ := filepath.Glob(filepath.Join(goenv.Get("TINYGOROOT"), "lib/wasi-libc", glob[0]))
-			outDir := filepath.Join(includeDir, glob[1])
-			os.MkdirAll(outDir, 0o777)
-			for _, match := range matches {
-				name := filepath.Base(match)
-				if _, ok := omitHeaders[name]; ok {
-					continue
-				}
-				data, err := os.ReadFile(match)
-				if err != nil {
-					return err
-				}
-				err = os.WriteFile(filepath.Join(outDir, name), data, 0o666)
-				if err != nil {
-					return err
-				}
-			}
-		}
-
-		return nil
-	},
-	cflags: func(target, headerPath string) []string {
-		libcDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/wasi-libc")
-		return []string{
-			"-Werror",
-			"-Wall",
-			"-std=gnu11",
-			"-nostdlibinc",
-			"-mnontrapping-fptoint", "-msign-ext", "-mbulk-memory",
-			"-Wno-null-pointer-arithmetic", "-Wno-unused-parameter", "-Wno-sign-compare", "-Wno-unused-variable", "-Wno-unused-function", "-Wno-ignored-attributes", "-Wno-missing-braces", "-Wno-ignored-pragmas", "-Wno-unused-but-set-variable", "-Wno-unknown-warning-option",
-			"-Wno-parentheses", "-Wno-shift-op-parentheses", "-Wno-bitwise-op-parentheses", "-Wno-logical-op-parentheses", "-Wno-string-plus-int", "-Wno-dangling-else", "-Wno-unknown-pragmas",
-			"-DNDEBUG",
-			"-D__wasilibc_printscan_no_long_double",
-			"-D__wasilibc_printscan_full_support_option=\"long double support is disabled\"",
-			"-DBULK_MEMORY_THRESHOLD=32", // default threshold in wasi-libc
-			"-isystem", headerPath,
-			"-I" + libcDir + "/libc-top-half/musl/src/include",
-			"-I" + libcDir + "/libc-top-half/musl/src/internal",
-			"-I" + libcDir + "/libc-top-half/musl/arch/wasm32",
-			"-I" + libcDir + "/libc-top-half/musl/arch/generic",
-			"-I" + libcDir + "/libc-top-half/headers/private",
-		}
-	},
-	cflagsForFile: func(path string) []string {
-		if strings.HasPrefix(path, "libc-bottom-half"+string(os.PathSeparator)) {
-			libcDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/wasi-libc")
-			return []string{
-				"-I" + libcDir + "/libc-bottom-half/headers/private",
-				"-I" + libcDir + "/libc-bottom-half/cloudlibc/src/include",
-				"-I" + libcDir + "/libc-bottom-half/cloudlibc/src",
-			}
-		}
-		return nil
-	},
-	sourceDir: func() string { return filepath.Join(goenv.Get("TINYGOROOT"), "lib/wasi-libc") },
-	librarySources: func(target string, libcNeedsMalloc bool) ([]string, error) {
-		type filePattern struct {
-			glob    string
-			exclude []string
-		}
-
-		// See: LIBC_TOP_HALF_MUSL_SOURCES in the Makefile
-		globs := []filePattern{
-			// Top half: mostly musl sources.
-			{glob: "libc-top-half/sources/*.c"},
-			{glob: "libc-top-half/musl/src/conf/*.c"},
-			{glob: "libc-top-half/musl/src/internal/*.c", exclude: []string{
-				"procfdname.c", "syscall.c", "syscall_ret.c", "vdso.c", "version.c",
-			}},
-			{glob: "libc-top-half/musl/src/locale/*.c", exclude: []string{
-				"dcngettext.c", "textdomain.c", "bind_textdomain_codeset.c"}},
-			{glob: "libc-top-half/musl/src/math/*.c", exclude: []string{
-				"__signbit.c", "__signbitf.c", "__signbitl.c",
-				"__fpclassify.c", "__fpclassifyf.c", "__fpclassifyl.c",
-				"ceilf.c", "ceil.c",
-				"floorf.c", "floor.c",
-				"truncf.c", "trunc.c",
-				"rintf.c", "rint.c",
-				"nearbyintf.c", "nearbyint.c",
-				"sqrtf.c", "sqrt.c",
-				"fabsf.c", "fabs.c",
-				"copysignf.c", "copysign.c",
-				"fminf.c", "fmaxf.c",
-				"fmin.c", "fmax.c,",
-			}},
-			{glob: "libc-top-half/musl/src/multibyte/*.c"},
-			{glob: "libc-top-half/musl/src/stdio/*.c", exclude: []string{
-				"vfwscanf.c", "vfwprintf.c", // long double is unsupported
-				"__lockfile.c", "flockfile.c", "funlockfile.c", "ftrylockfile.c",
-				"rename.c",
-				"tmpnam.c", "tmpfile.c", "tempnam.c",
-				"popen.c", "pclose.c",
-				"remove.c",
-				"gets.c"}},
-			{glob: "libc-top-half/musl/src/stdlib/*.c"},
-			{glob: "libc-top-half/musl/src/string/*.c", exclude: []string{
-				"strsignal.c"}},
-
-			// Bottom half: connect top half to WASI equivalents.
-			{glob: "libc-bottom-half/cloudlibc/src/libc/*/*.c"},
-			{glob: "libc-bottom-half/cloudlibc/src/libc/sys/*/*.c"},
-			{glob: "libc-bottom-half/sources/*.c"},
-		}
-
-		// We're using the Boehm GC, so we need a heap implementation in the libc.
-		if libcNeedsMalloc {
-			globs = append(globs, filePattern{glob: "dlmalloc/src/dlmalloc.c"})
-		}
-
-		// See: LIBC_TOP_HALF_MUSL_SOURCES in the Makefile
-		sources := []string{
-			"libc-top-half/musl/src/misc/a64l.c",
-			"libc-top-half/musl/src/misc/basename.c",
-			"libc-top-half/musl/src/misc/dirname.c",
-			"libc-top-half/musl/src/misc/ffs.c",
-			"libc-top-half/musl/src/misc/ffsl.c",
-			"libc-top-half/musl/src/misc/ffsll.c",
-			"libc-top-half/musl/src/misc/fmtmsg.c",
-			"libc-top-half/musl/src/misc/getdomainname.c",
-			"libc-top-half/musl/src/misc/gethostid.c",
-			"libc-top-half/musl/src/misc/getopt.c",
-			"libc-top-half/musl/src/misc/getopt_long.c",
-			"libc-top-half/musl/src/misc/getsubopt.c",
-			"libc-top-half/musl/src/misc/uname.c",
-			"libc-top-half/musl/src/misc/nftw.c",
-			"libc-top-half/musl/src/errno/strerror.c",
-			"libc-top-half/musl/src/network/htonl.c",
-			"libc-top-half/musl/src/network/htons.c",
-			"libc-top-half/musl/src/network/ntohl.c",
-			"libc-top-half/musl/src/network/ntohs.c",
-			"libc-top-half/musl/src/network/inet_ntop.c",
-			"libc-top-half/musl/src/network/inet_pton.c",
-			"libc-top-half/musl/src/network/inet_aton.c",
-			"libc-top-half/musl/src/network/in6addr_any.c",
-			"libc-top-half/musl/src/network/in6addr_loopback.c",
-			"libc-top-half/musl/src/fenv/fenv.c",
-			"libc-top-half/musl/src/fenv/fesetround.c",
-			"libc-top-half/musl/src/fenv/feupdateenv.c",
-			"libc-top-half/musl/src/fenv/fesetexceptflag.c",
-			"libc-top-half/musl/src/fenv/fegetexceptflag.c",
-			"libc-top-half/musl/src/fenv/feholdexcept.c",
-			"libc-top-half/musl/src/exit/exit.c",
-			"libc-top-half/musl/src/exit/atexit.c",
-			"libc-top-half/musl/src/exit/assert.c",
-			"libc-top-half/musl/src/exit/quick_exit.c",
-			"libc-top-half/musl/src/exit/at_quick_exit.c",
-			"libc-top-half/musl/src/time/strftime.c",
-			"libc-top-half/musl/src/time/asctime.c",
-			"libc-top-half/musl/src/time/asctime_r.c",
-			"libc-top-half/musl/src/time/ctime.c",
-			"libc-top-half/musl/src/time/ctime_r.c",
-			"libc-top-half/musl/src/time/wcsftime.c",
-			"libc-top-half/musl/src/time/strptime.c",
-			"libc-top-half/musl/src/time/difftime.c",
-			"libc-top-half/musl/src/time/timegm.c",
-			"libc-top-half/musl/src/time/ftime.c",
-			"libc-top-half/musl/src/time/gmtime.c",
-			"libc-top-half/musl/src/time/gmtime_r.c",
-			"libc-top-half/musl/src/time/timespec_get.c",
-			"libc-top-half/musl/src/time/getdate.c",
-			"libc-top-half/musl/src/time/localtime.c",
-			"libc-top-half/musl/src/time/localtime_r.c",
-			"libc-top-half/musl/src/time/mktime.c",
-			"libc-top-half/musl/src/time/__tm_to_secs.c",
-			"libc-top-half/musl/src/time/__month_to_secs.c",
-			"libc-top-half/musl/src/time/__secs_to_tm.c",
-			"libc-top-half/musl/src/time/__year_to_secs.c",
-			"libc-top-half/musl/src/time/__tz.c",
-			"libc-top-half/musl/src/fcntl/creat.c",
-			"libc-top-half/musl/src/dirent/alphasort.c",
-			"libc-top-half/musl/src/dirent/versionsort.c",
-			"libc-top-half/musl/src/env/__stack_chk_fail.c",
-			"libc-top-half/musl/src/env/clearenv.c",
-			"libc-top-half/musl/src/env/getenv.c",
-			"libc-top-half/musl/src/env/putenv.c",
-			"libc-top-half/musl/src/env/setenv.c",
-			"libc-top-half/musl/src/env/unsetenv.c",
-			"libc-top-half/musl/src/unistd/posix_close.c",
-			"libc-top-half/musl/src/stat/futimesat.c",
-			"libc-top-half/musl/src/legacy/getpagesize.c",
-			"libc-top-half/musl/src/thread/thrd_sleep.c",
-		}
-
-		basepath := goenv.Get("TINYGOROOT") + "/lib/wasi-libc/"
-		for _, pattern := range globs {
-			matches, err := filepath.Glob(basepath + pattern.glob)
-			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("wasi-libc: could not glob source dirs: %w", err)
-			}
-			if len(matches) == 0 {
-				return nil, fmt.Errorf("wasi-libc: did not find any files for pattern %#v", pattern)
-			}
-			excludeSet := map[string]struct{}{}
-			for _, exclude := range pattern.exclude {
-				excludeSet[exclude] = struct{}{}
-			}
-			for _, match := range matches {
-				if _, ok := excludeSet[filepath.Base(match)]; ok {
-					continue
-				}
-				relpath, err := filepath.Rel(basepath, match)
-				if err != nil {
-					// Not sure if this is even possible.
-					return nil, err
-				}
-				sources = append(sources, relpath)
-			}
-		}
-		return sources, nil
-	},
-}

builder/wasmbuiltins.go

@@ -29,8 +29,6 @@ var libWasmBuiltins = Library{
 			"-Wall",
 			"-std=gnu11",
 			"-nostdlibinc",
-			"-mnontrapping-fptoint", // match wasm-unknown (default on in LLVM 20)
-			"-mno-bulk-memory",      // same here
 			"-isystem", libcDir + "/libc-top-half/musl/arch/wasm32",
 			"-isystem", libcDir + "/libc-top-half/musl/arch/generic",
 			"-isystem", libcDir + "/libc-top-half/musl/src/internal",
@@ -41,7 +39,7 @@ var libWasmBuiltins = Library{
 		}
 	},
 	sourceDir: func() string { return filepath.Join(goenv.Get("TINYGOROOT"), "lib/wasi-libc") },
-	librarySources: func(target string, _ bool) ([]string, error) {
+	librarySources: func(target string) ([]string, error) {
 		return []string{
 			// memory builtins needed for llvm.memcpy.*, llvm.memmove.*, and
 			// llvm.memset.* LLVM intrinsics.

cgo/libclang.go

@@ -71,7 +71,7 @@ unsigned tinygo_clang_Cursor_isMacroFunctionLike(GoCXCursor c);
 //     libclang.go:68:5: note: previous declaration is here
 // See: https://github.com/golang/go/issues/49721
 #if defined(_WIN32)
-#define CGO_DECL __declspec(dllexport)
+#define CGO_DECL // __declspec(dllexport)
 #else
 #define CGO_DECL
 #endif

cgo/libclang_config_llvm19.go

@@ -1,4 +1,4 @@
-//go:build !byollvm && llvm19
+//go:build !byollvm && !llvm15 && !llvm16 && !llvm17 && !llvm18
 
 package cgo
 

cgo/libclang_config_llvm20.go

@@ -1,15 +0,0 @@
-//go:build !byollvm && !llvm15 && !llvm16 && !llvm17 && !llvm18 && !llvm19
-
-package cgo
-
-/*
-#cgo linux        CFLAGS:  -I/usr/include/llvm-20 -I/usr/include/llvm-c-20 -I/usr/lib/llvm-20/include
-#cgo darwin,amd64 CFLAGS:  -I/usr/local/opt/llvm@20/include
-#cgo darwin,arm64 CFLAGS:  -I/opt/homebrew/opt/llvm@20/include
-#cgo freebsd      CFLAGS:  -I/usr/local/llvm20/include
-#cgo linux        LDFLAGS: -L/usr/lib/llvm-20/lib -lclang
-#cgo darwin,amd64 LDFLAGS: -L/usr/local/opt/llvm@20/lib -lclang
-#cgo darwin,arm64 LDFLAGS: -L/opt/homebrew/opt/llvm@20/lib -lclang
-#cgo freebsd      LDFLAGS: -L/usr/local/llvm20/lib -lclang
-*/
-import "C"

cgo/security.go

@@ -78,7 +78,6 @@ var validCompilerFlags = []*regexp.Regexp{
 	re(`-f(no-)?(pic|PIC|pie|PIE)`),
 	re(`-f(no-)?plt`),
 	re(`-f(no-)?rtti`),
-	re(`-f(no-)?short-enums`),
 	re(`-f(no-)?split-stack`),
 	re(`-f(no-)?stack-(.+)`),
 	re(`-f(no-)?strict-aliasing`),

compileopts/config.go

@@ -8,24 +8,12 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
-	"strconv"
 	"strings"
 
 	"github.com/google/shlex"
 	"github.com/tinygo-org/tinygo/goenv"
 )
 
-// Library versions. Whenever an existing library is changed, this number should
-// be added/increased so that existing caches are invalidated.
-//
-// (This is a bit of a layering violation, this should really be part of the
-// builder.Library struct but that's hard to do since we want to know the
-// library path in advance in several places).
-var libVersions = map[string]int{
-	"musl":  3,
-	"bdwgc": 2,
-}
-
 // Config keeps all configuration affecting the build in a single struct.
 type Config struct {
 	Options        *Options
@@ -111,11 +99,6 @@ func (c *Config) BuildTags() []string {
 		"math_big_pure_go",                           // to get math/big to work
 		"gc." + c.GC(), "scheduler." + c.Scheduler(), // used inside the runtime package
 		"serial." + c.Serial()}...) // used inside the machine package
-	switch c.Scheduler() {
-	case "threads", "cores":
-	default:
-		tags = append(tags, "tinygo.unicore")
-	}
 	for i := 1; i <= c.GoMinorVersion; i++ {
 		tags = append(tags, fmt.Sprintf("go1.%d", i))
 	}
@@ -139,7 +122,7 @@ func (c *Config) GC() string {
 // that can be traced by the garbage collector.
 func (c *Config) NeedsStackObjects() bool {
 	switch c.GC() {
-	case "conservative", "custom", "precise", "boehm":
+	case "conservative", "custom", "precise":
 		for _, tag := range c.BuildTags() {
 			if tag == "tinygo.wasm" {
 				return true
@@ -226,7 +209,7 @@ func (c *Config) StackSize() uint64 {
 
 // MaxStackAlloc returns the size of the maximum allocation to put on the stack vs heap.
 func (c *Config) MaxStackAlloc() uint64 {
-	if c.StackSize() >= 16*1024 {
+	if c.StackSize() > 32*1024 {
 		return 1024
 	}
 
@@ -264,18 +247,10 @@ func MuslArchitecture(triple string) string {
 	return CanonicalArchName(triple)
 }
 
-// Returns true if the libc needs to include malloc, for the libcs where this
+// LibcPath returns the path to the libc directory. The libc path will be either
-// matters.
+// a precompiled libc shipped with a TinyGo build, or a libc path in the cache
-func (c *Config) LibcNeedsMalloc() bool {
+// directory (which might not yet be built).
-	if c.GC() == "boehm" && c.Target.Libc == "wasi-libc" {
+func (c *Config) LibcPath(name string) (path string, precompiled bool) {
-		return true
-	}
-	return false
-}
-
-// LibraryPath returns the path to the library build directory. The path will be
-// a library path in the cache directory (which might not yet be built).
-func (c *Config) LibraryPath(name string) string {
 	archname := c.Triple()
 	if c.CPU() != "" {
 		archname += "-" + c.CPU()
@@ -286,24 +261,18 @@ func (c *Config) LibraryPath(name string) string {
 	if c.Target.SoftFloat {
 		archname += "-softfloat"
 	}
-	if name == "bdwgc" {
-		// Boehm GC is compiled against a particular libc.
-		archname += "-" + c.Target.Libc
-	}
 
-	// Append a version string, if this library has a version.
+	// Try to load a precompiled library.
-	if v, ok := libVersions[name]; ok {
+	precompiledDir := filepath.Join(goenv.Get("TINYGOROOT"), "pkg", archname, name)
-		archname += "-v" + strconv.Itoa(v)
+	if _, err := os.Stat(precompiledDir); err == nil {
-	}
+		// Found a precompiled library for this OS/architecture. Return the path
-
+		// directly.
-	options := ""
+		return precompiledDir, true
-	if c.LibcNeedsMalloc() {
-		options += "+malloc"
 	}
 
 	// No precompiled library found. Determine the path name that will be used
 	// in the build cache.
-	return filepath.Join(goenv.Get("GOCACHE"), name+options+"-"+archname)
+	return filepath.Join(goenv.Get("GOCACHE"), name+"-"+archname), false
 }
 
 // DefaultBinaryExtension returns the default extension for binaries, such as
@@ -346,7 +315,59 @@ func (c *Config) CFlags(libclang bool) []string {
 			"-resource-dir="+resourceDir,
 		)
 	}
-	cflags = append(cflags, c.LibcCFlags()...)
+	switch c.Target.Libc {
+	case "darwin-libSystem":
+		root := goenv.Get("TINYGOROOT")
+		cflags = append(cflags,
+			"-nostdlibinc",
+			"-isystem", filepath.Join(root, "lib/macos-minimal-sdk/src/usr/include"),
+		)
+	case "picolibc":
+		root := goenv.Get("TINYGOROOT")
+		picolibcDir := filepath.Join(root, "lib", "picolibc", "newlib", "libc")
+		path, _ := c.LibcPath("picolibc")
+		cflags = append(cflags,
+			"-nostdlibinc",
+			"-isystem", filepath.Join(path, "include"),
+			"-isystem", filepath.Join(picolibcDir, "include"),
+			"-isystem", filepath.Join(picolibcDir, "tinystdio"),
+			"-D__PICOLIBC_ERRNO_FUNCTION=__errno_location",
+		)
+	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", "arch", "generic"),
+			"-isystem", filepath.Join(root, "lib", "musl", "include"),
+		)
+	case "wasi-libc":
+		root := goenv.Get("TINYGOROOT")
+		cflags = append(cflags,
+			"-nostdlibinc",
+			"-isystem", root+"/lib/wasi-libc/sysroot/include")
+	case "wasmbuiltins":
+		// nothing to add (library is purely for builtins)
+	case "mingw-w64":
+		root := goenv.Get("TINYGOROOT")
+		path, _ := c.LibcPath("mingw-w64")
+		cflags = append(cflags,
+			"-nostdlibinc",
+			"-isystem", filepath.Join(path, "include"),
+			"-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.
@@ -373,80 +394,6 @@ func (c *Config) CFlags(libclang bool) []string {
 	return cflags
 }
 
-// LibcCFlags returns the C compiler flags for the configured libc.
-// It only uses flags that are part of the libc path (triple, cpu, abi, libc
-// name) so it can safely be used to compile another C library.
-func (c *Config) LibcCFlags() []string {
-	switch c.Target.Libc {
-	case "darwin-libSystem":
-		root := goenv.Get("TINYGOROOT")
-		return []string{
-			"-nostdlibinc",
-			"-isystem", filepath.Join(root, "lib/macos-minimal-sdk/src/usr/include"),
-		}
-	case "picolibc":
-		root := goenv.Get("TINYGOROOT")
-		picolibcDir := filepath.Join(root, "lib", "picolibc", "newlib", "libc")
-		path := c.LibraryPath("picolibc")
-		return []string{
-			"-nostdlibinc",
-			"-isystem", filepath.Join(path, "include"),
-			"-isystem", filepath.Join(picolibcDir, "include"),
-			"-isystem", filepath.Join(picolibcDir, "tinystdio"),
-			"-D__PICOLIBC_ERRNO_FUNCTION=__errno_location",
-		}
-	case "musl":
-		root := goenv.Get("TINYGOROOT")
-		path := c.LibraryPath("musl")
-		arch := MuslArchitecture(c.Triple())
-		return []string{
-			"-nostdlibinc",
-			"-isystem", filepath.Join(path, "include"),
-			"-isystem", filepath.Join(root, "lib", "musl", "arch", arch),
-			"-isystem", filepath.Join(root, "lib", "musl", "arch", "generic"),
-			"-isystem", filepath.Join(root, "lib", "musl", "include"),
-		}
-	case "wasi-libc":
-		path := c.LibraryPath("wasi-libc")
-		return []string{
-			"-nostdlibinc",
-			"-isystem", filepath.Join(path, "include"),
-		}
-	case "wasmbuiltins":
-		// nothing to add (library is purely for builtins)
-		return nil
-	case "mingw-w64":
-		root := goenv.Get("TINYGOROOT")
-		path := c.LibraryPath("mingw-w64")
-		cflags := []string{
-			"-nostdlibinc",
-			"-isystem", filepath.Join(path, "include"),
-			"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "crt"),
-			"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "include"),
-			"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "defaults", "include"),
-		}
-		if c.GOARCH() == "386" {
-			cflags = append(cflags,
-				"-D__MSVCRT_VERSION__=0x700", // Microsoft Visual C++ .NET 2002
-				"-D_WIN32_WINNT=0x0501",      // target Windows XP
-			)
-		} else {
-			cflags = append(cflags,
-				"-D_UCRT",
-				"-D_WIN32_WINNT=0x0a00", // target Windows 10
-			)
-		}
-		return cflags
-	case "":
-		// No libc specified, nothing to add.
-		return nil
-	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)
-	}
-}
-
 // 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.
@@ -536,7 +483,7 @@ func (c *Config) Programmer() (method, openocdInterface string) {
 	case "":
 		// No configuration supplied.
 		return c.Target.FlashMethod, c.Target.OpenOCDInterface
-	case "openocd", "msd", "command", "adb":
+	case "openocd", "msd", "command":
 		// The -programmer flag only specifies the flash method.
 		return c.Options.Programmer, c.Target.OpenOCDInterface
 	case "bmp":

compileopts/options.go

@@ -9,8 +9,8 @@ import (
 
 var (
 	validBuildModeOptions     = []string{"default", "c-shared", "wasi-legacy"}
-	validGCOptions            = []string{"none", "leaking", "conservative", "custom", "precise", "boehm"}
+	validGCOptions            = []string{"none", "leaking", "conservative", "custom", "precise"}
-	validSchedulerOptions     = []string{"none", "tasks", "asyncify", "threads", "cores"}
+	validSchedulerOptions     = []string{"none", "tasks", "asyncify"}
 	validSerialOptions        = []string{"none", "uart", "usb", "rtt"}
 	validPrintSizeOptions     = []string{"none", "short", "full", "html"}
 	validPanicStrategyOptions = []string{"print", "trap"}
@@ -43,7 +43,6 @@ type Options struct {
 	PrintCommands   func(cmd string, args ...string) `json:"-"`
 	Semaphore       chan struct{}                    `json:"-"` // -p flag controls cap
 	Debug           bool
-	Nobounds        bool
 	PrintSizes      string
 	PrintAllocs     *regexp.Regexp // regexp string
 	PrintStacks     bool
@@ -53,13 +52,13 @@ type Options struct {
 	Programmer      string
 	OpenOCDCommands []string
 	LLVMFeatures    string
+	PrintJSON       bool
 	Monitor         bool
 	BaudRate        int
 	Timeout         time.Duration
 	WITPackage      string // pass through to wasm-tools component embed invocation
 	WITWorld        string // pass through to wasm-tools component embed -w option
 	ExtLDFlags      []string
-	GoCompatibility bool // enable to check for Go version compatibility
 }
 
 // Verify performs a validation on the given options, raising an error if options are not valid.

compileopts/options_test.go

@@ -9,8 +9,8 @@ import (
 
 func TestVerifyOptions(t *testing.T) {
 
-	expectedGCError := errors.New(`invalid gc option 'incorrect': valid values are none, leaking, conservative, custom, precise, boehm`)
+	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, threads, cores`)
+	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, html`)
 	expectedPanicStrategyError := errors.New(`invalid panic option 'incorrect': valid values are print, trap`)
 

compileopts/target.go

@@ -24,7 +24,6 @@ import (
 // https://github.com/shepmaster/rust-arduino-blink-led-no-core-with-cargo/blob/master/blink/arduino.json
 type TargetSpec struct {
 	Inherits         []string `json:"inherits,omitempty"`
-	InheritableOnly  bool     `json:"inheritable-only"` // this target is only meant to be inherited from, not used directly
 	Triple           string   `json:"llvm-target,omitempty"`
 	CPU              string   `json:"cpu,omitempty"`
 	ABI              string   `json:"target-abi,omitempty"` // roughly equivalent to -mabi= flag
@@ -64,9 +63,6 @@ type TargetSpec struct {
 	OpenOCDCommands  []string `json:"openocd-commands,omitempty"`
 	OpenOCDVerify    *bool    `json:"openocd-verify,omitempty"` // enable verify when flashing with openocd
 	JLinkDevice      string   `json:"jlink-device,omitempty"`
-	ADBPreCommands   []string `json:"adb-pre-commands,omitempty"`
-	ADBPushRemote    string   `json:"adb-push-remote,omitempty"`
-	ADBPostCommands  []string `json:"adb-post-commands,omitempty"`
 	CodeModel        string   `json:"code-model,omitempty"`
 	RelocationModel  string   `json:"relocation-model,omitempty"`
 	WITPackage       string   `json:"wit-package,omitempty"`
@@ -152,11 +148,6 @@ func (spec *TargetSpec) loadFromGivenStr(str string) error {
 
 // resolveInherits loads inherited targets, recursively.
 func (spec *TargetSpec) resolveInherits() error {
-	// Save InheritableOnly before resolving, since it must not propagate
-	// from parent to child (a board target should not become inheritable-only
-	// just because its parent processor target is).
-	inheritableOnly := spec.InheritableOnly
-
 	// First create a new spec with all the inherited properties.
 	newSpec := &TargetSpec{}
 	for _, name := range spec.Inherits {
@@ -182,29 +173,11 @@ func (spec *TargetSpec) resolveInherits() error {
 	}
 	*spec = *newSpec
 
-	// Restore InheritableOnly from the original spec, not from parents.
-	spec.InheritableOnly = inheritableOnly
-
 	return nil
 }
 
 // Load a target specification.
 func LoadTarget(options *Options) (*TargetSpec, error) {
-	if options.Target == "" && options.GOARCH == "wasm" {
-		// Set a specific target if we're building from a known GOOS/GOARCH
-		// combination that is defined in a target JSON file.
-		switch options.GOOS {
-		case "js":
-			options.Target = "wasm"
-		case "wasip1":
-			options.Target = "wasip1"
-		case "wasip2":
-			options.Target = "wasip2"
-		default:
-			return nil, errors.New("GOARCH=wasm but GOOS is not set correctly. Please set GOOS to js, wasip1, or wasip2.")
-		}
-	}
-
 	if options.Target == "" {
 		return defaultTarget(options)
 	}
@@ -251,17 +224,10 @@ func GetTargetSpecs() (map[string]*TargetSpec, error) {
 			continue
 		}
 		path := filepath.Join(dir, entry.Name())
-
 		spec, err := LoadTarget(&Options{Target: path})
 		if err != nil {
 			return nil, fmt.Errorf("could not list target: %w", err)
 		}
-
-		if spec.InheritableOnly {
-			// Skip targets that are only meant to be inherited from, not used directly.
-			continue
-		}
-
 		if spec.FlashMethod == "" && spec.FlashCommand == "" && spec.Emulator == "" {
 			// This doesn't look like a regular target file, but rather like
 			// a parent target (such as targets/cortex-m.json).
@@ -281,6 +247,8 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 		GOOS:             options.GOOS,
 		GOARCH:           options.GOARCH,
 		BuildTags:        []string{options.GOOS, options.GOARCH},
+		GC:               "precise",
+		Scheduler:        "tasks",
 		Linker:           "cc",
 		DefaultStackSize: 1024 * 64, // 64kB
 		GDB:              []string{"gdb"},
@@ -388,7 +356,17 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 			return nil, fmt.Errorf("invalid GOMIPS=%s: must be hardfloat or softfloat", options.GOMIPS)
 		}
 	case "wasm":
-		return nil, fmt.Errorf("GOARCH=wasm but GOOS is unset. Please set GOOS to js, wasip1, or wasip2.")
+		llvmarch = "wasm32"
+		spec.CPU = "generic"
+		spec.Features = "+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types"
+		spec.BuildTags = append(spec.BuildTags, "tinygo.wasm")
+		spec.CFlags = append(spec.CFlags,
+			"-mbulk-memory",
+			"-mnontrapping-fptoint",
+			"-mno-multivalue",
+			"-mno-reference-types",
+			"-msign-ext",
+		)
 	default:
 		return nil, fmt.Errorf("unknown GOARCH=%s", options.GOARCH)
 	}
@@ -398,13 +376,11 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 	llvmvendor := "unknown"
 	switch options.GOOS {
 	case "darwin":
-		spec.GC = "boehm"
 		platformVersion := "10.12.0"
 		if options.GOARCH == "arm64" {
 			platformVersion = "11.0.0" // first macosx platform with arm64 support
 		}
 		llvmvendor = "apple"
-		spec.Scheduler = "threads"
 		spec.Linker = "ld.lld"
 		spec.Libc = "darwin-libSystem"
 		// Use macosx* instead of darwin, otherwise darwin/arm64 will refer to
@@ -418,13 +394,10 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 		)
 		spec.ExtraFiles = append(spec.ExtraFiles,
 			"src/internal/futex/futex_darwin.c",
-			"src/internal/task/task_threads.c",
 			"src/runtime/os_darwin.c",
 			"src/runtime/runtime_unix.c",
 			"src/runtime/signal.c")
 	case "linux":
-		spec.GC = "boehm"
-		spec.Scheduler = "threads"
 		spec.Linker = "ld.lld"
 		spec.RTLib = "compiler-rt"
 		spec.Libc = "musl"
@@ -445,30 +418,19 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 		}
 		spec.ExtraFiles = append(spec.ExtraFiles,
 			"src/internal/futex/futex_linux.c",
-			"src/internal/task/task_threads.c",
 			"src/runtime/runtime_unix.c",
 			"src/runtime/signal.c")
 	case "windows":
-		spec.GC = "boehm"
-		spec.Scheduler = "tasks"
 		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 options.GOARCH {
-		case "386":
-			spec.LDFlags = append(spec.LDFlags,
-				"-m", "i386pe",
-				"--major-os-version", "4",
-				"--major-subsystem-version", "4",
-			)
-			// __udivdi3 is not present in ucrt it seems.
-			spec.RTLib = "compiler-rt"
 		case "amd64":
-			// 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
 			spec.LDFlags = append(spec.LDFlags,
 				"-m", "i386pep",
 				"--image-base", "0x400000",
@@ -484,18 +446,27 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 			"--no-insert-timestamp",
 			"--no-dynamicbase",
 		)
-	case "wasm", "wasip1", "wasip2":
+	case "wasip1":
-		return nil, fmt.Errorf("GOOS=%s but GOARCH is unset. Please set GOARCH to wasm", options.GOOS)
+		spec.GC = "" // use default GC
+		spec.Scheduler = "asyncify"
+		spec.Linker = "wasm-ld"
+		spec.RTLib = "compiler-rt"
+		spec.Libc = "wasi-libc"
+		spec.DefaultStackSize = 1024 * 64 // 64kB
+		spec.LDFlags = append(spec.LDFlags,
+			"--stack-first",
+			"--no-demangle",
+		)
+		spec.Emulator = "wasmtime run --dir={tmpDir}::/tmp {}"
+		spec.ExtraFiles = append(spec.ExtraFiles,
+			"src/runtime/asm_tinygowasm.S",
+			"src/internal/task/task_asyncify_wasm.S",
+		)
+		llvmos = "wasi"
 	default:
 		return nil, fmt.Errorf("unknown GOOS=%s", options.GOOS)
 	}
 
-	if spec.GC == "boehm" {
-		// Add this file only when needed. This fixes a build failure on
-		// Windows.
-		spec.ExtraFiles = append(spec.ExtraFiles, "src/runtime/gc_boehm.c")
-	}
-
 	// Target triples (which actually have four components, but are called
 	// triples for historical reasons) have the form:
 	//   arch-vendor-os-environment

compileopts/target_test.go

@@ -23,37 +23,6 @@ func TestLoadTarget(t *testing.T) {
 	}
 }
 
-func TestGetTargetSpecs_InheritableOnlyTargetsExcluded(t *testing.T) {
-	specs, err := GetTargetSpecs()
-	if err != nil {
-		t.Fatal("GetTargetSpecs failed:", err)
-	}
-
-	// Inheritable-only processor-level targets should not appear in the listing.
-	inheritableOnlyTargets := []string{"esp32", "esp32c3", "esp32s3", "esp8266", "rp2040", "rp2350", "rp2350b"}
-	for _, name := range inheritableOnlyTargets {
-		if _, ok := specs[name]; ok {
-			t.Errorf("inheritable-only target %q should not appear in GetTargetSpecs", name)
-		}
-	}
-
-	// Board targets that inherit from inheritable-only targets should still appear.
-	boardTargets := []string{"esp32-coreboard-v2", "pico"}
-	for _, name := range boardTargets {
-		if _, ok := specs[name]; !ok {
-			t.Errorf("board target %q should appear in GetTargetSpecs", name)
-		}
-	}
-}
-
-func TestLoadTarget_InheritableOnlyTargetStillLoadable(t *testing.T) {
-	// Inheritable-only targets should still be loadable directly (for building).
-	_, err := LoadTarget(&Options{Target: "esp32"})
-	if err != nil {
-		t.Errorf("LoadTarget should still load inheritable-only target esp32: %v", err)
-	}
-}
-
 func TestOverrideProperties(t *testing.T) {
 	baseAutoStackSize := true
 	base := &TargetSpec{

compiler/asserts.go

@@ -31,7 +31,7 @@ func (b *builder) createLookupBoundsCheck(arrayLen, index llvm.Value) {
 
 	// Now do the bounds check: index >= arrayLen
 	outOfBounds := b.CreateICmp(llvm.IntUGE, index, arrayLen, "")
-	b.createRuntimeAssert(outOfBounds, "lookup", "lookupPanic")
+	b.createRuntimeAssert(outOfBounds, "lookup", "lookupPanic", true)
 }
 
 // createSliceBoundsCheck emits a bounds check before a slicing operation to make
@@ -74,7 +74,7 @@ func (b *builder) createSliceBoundsCheck(capacity, low, high, max llvm.Value, lo
 	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")
+	b.createRuntimeAssert(outOfBounds, "slice", "slicePanic", false)
 }
 
 // createSliceToArrayPointerCheck adds a check for slice-to-array pointer
@@ -86,7 +86,7 @@ func (b *builder) createSliceToArrayPointerCheck(sliceLen llvm.Value, arrayLen i
 	// > run-time panic occurs.
 	arrayLenValue := llvm.ConstInt(b.uintptrType, uint64(arrayLen), false)
 	isLess := b.CreateICmp(llvm.IntULT, sliceLen, arrayLenValue, "")
-	b.createRuntimeAssert(isLess, "slicetoarray", "sliceToArrayPointerPanic")
+	b.createRuntimeAssert(isLess, "slicetoarray", "sliceToArrayPointerPanic", false)
 }
 
 // createUnsafeSliceStringCheck inserts a runtime check used for unsafe.Slice
@@ -118,7 +118,7 @@ func (b *builder) createUnsafeSliceStringCheck(name string, ptr, len llvm.Value,
 	lenIsNotZero := b.CreateICmp(llvm.IntNE, len, zero, "")
 	assert := b.CreateAnd(ptrIsNil, lenIsNotZero, "")
 	assert = b.CreateOr(assert, lenOutOfBounds, "")
-	b.createRuntimeAssert(assert, name, "unsafeSlicePanic")
+	b.createRuntimeAssert(assert, name, "unsafeSlicePanic", false)
 }
 
 // createChanBoundsCheck creates a bounds check before creating a new channel to
@@ -155,7 +155,7 @@ func (b *builder) createChanBoundsCheck(elementSize uint64, bufSize llvm.Value,
 
 	// Do the check for a too large (or negative) buffer size.
 	bufSizeTooBig := b.CreateICmp(llvm.IntUGE, bufSize, maxBufSize, "")
-	b.createRuntimeAssert(bufSizeTooBig, "chan", "chanMakePanic")
+	b.createRuntimeAssert(bufSizeTooBig, "chan", "chanMakePanic", false)
 }
 
 // createNilCheck checks whether the given pointer is nil, and panics if it is.
@@ -199,7 +199,7 @@ func (b *builder) createNilCheck(inst ssa.Value, ptr llvm.Value, blockPrefix str
 	isnil := b.CreateICmp(llvm.IntEQ, ptr, nilptr, "")
 
 	// Emit the nil check in IR.
-	b.createRuntimeAssert(isnil, blockPrefix, "nilPanic")
+	b.createRuntimeAssert(isnil, blockPrefix, "nilPanic", false)
 }
 
 // createNegativeShiftCheck creates an assertion that panics if the given shift value is negative.
@@ -212,7 +212,7 @@ func (b *builder) createNegativeShiftCheck(shift llvm.Value) {
 
 	// isNegative = shift < 0
 	isNegative := b.CreateICmp(llvm.IntSLT, shift, llvm.ConstInt(shift.Type(), 0, false), "")
-	b.createRuntimeAssert(isNegative, "shift", "negativeShiftPanic")
+	b.createRuntimeAssert(isNegative, "shift", "negativeShiftPanic", false)
 }
 
 // createDivideByZeroCheck asserts that y is not zero. If it is, a runtime panic
@@ -225,12 +225,12 @@ func (b *builder) createDivideByZeroCheck(y llvm.Value) {
 
 	// isZero = y == 0
 	isZero := b.CreateICmp(llvm.IntEQ, y, llvm.ConstInt(y.Type(), 0, false), "")
-	b.createRuntimeAssert(isZero, "divbyzero", "divideByZeroPanic")
+	b.createRuntimeAssert(isZero, "divbyzero", "divideByZeroPanic", true)
 }
 
 // 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) {
+func (b *builder) createRuntimeAssert(assert llvm.Value, blockPrefix, assertFunc string, isInvoke bool) {
 	// Check whether we can resolve this check at compile time.
 	if !assert.IsAConstantInt().IsNil() {
 		val := assert.ZExtValue()
@@ -245,17 +245,17 @@ func (b *builder) createRuntimeAssert(assert llvm.Value, blockPrefix, assertFunc
 	// current insert position.
 	faultBlock := b.ctx.AddBasicBlock(b.llvmFn, blockPrefix+".throw")
 	nextBlock := b.insertBasicBlock(blockPrefix + ".next")
-	b.currentBlockInfo.exit = 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.createRuntimeCallCommon(assertFunc, nil, "", isInvoke)
 	b.CreateUnreachable()
 
 	// Ok: assert didn't trigger so continue normally.
+	b.blockExits[b.currentBlock] = nextBlock // adjust outgoing block for phi nodes
 	b.SetInsertPointAtEnd(nextBlock)
 }
 

compiler/calls.go

@@ -32,9 +32,6 @@ const (
 	// Whether this is a full or partial Go parameter (int, slice, etc).
 	// The extra context parameter is not a Go parameter.
 	paramIsGoParam = 1 << iota
-
-	// Whether this is a readonly parameter (for example, a string pointer).
-	paramIsReadonly
 )
 
 // createRuntimeCallCommon creates a runtime call. Use createRuntimeCall or
@@ -79,15 +76,7 @@ func (b *builder) createCall(fnType llvm.Type, fn llvm.Value, args []llvm.Value,
 		fragments := b.expandFormalParam(arg)
 		expanded = append(expanded, fragments...)
 	}
-	call := b.CreateCall(fnType, fn, expanded, name)
+	return b.CreateCall(fnType, fn, expanded, name)
-	if !fn.IsAFunction().IsNil() {
-		if cc := fn.FunctionCallConv(); cc != llvm.CCallConv {
-			// Set a different calling convention if needed.
-			// This is needed for GetModuleHandleExA on Windows, for example.
-			call.SetInstructionCallConv(cc)
-		}
-	}
-	return call
 }
 
 // createInvoke is like createCall but continues execution at the landing pad if
@@ -170,7 +159,6 @@ func (c *compilerContext) flattenAggregateType(t llvm.Type, name string, goType
 				continue
 			}
 			suffix := strconv.Itoa(i)
-			isString := false
 			if goType != nil {
 				// Try to come up with a good suffix for this struct field,
 				// depending on which Go type it's based on.
@@ -187,16 +175,12 @@ func (c *compilerContext) flattenAggregateType(t llvm.Type, name string, goType
 						suffix = []string{"r", "i"}[i]
 					case types.String:
 						suffix = []string{"data", "len"}[i]
-						isString = true
 					}
 				case *types.Signature:
 					suffix = []string{"context", "funcptr"}[i]
 				}
 			}
 			subInfos := c.flattenAggregateType(subfield, name+"."+suffix, extractSubfield(goType, i))
-			if isString {
-				subInfos[0].flags |= paramIsReadonly
-			}
 			paramInfos = append(paramInfos, subInfos...)
 		}
 		return paramInfos

compiler/compiler.go

@@ -58,7 +58,6 @@ type Config struct {
 	MaxStackAlloc      uint64
 	NeedsStackObjects  bool
 	Debug              bool // Whether to emit debug information in the LLVM module.
-	Nobounds           bool // Whether to skip bounds checks
 	PanicStrategy      string
 }
 
@@ -152,12 +151,10 @@ type builder struct {
 	llvmFnType        llvm.Type
 	llvmFn            llvm.Value
 	info              functionInfo
-	locals            map[ssa.Value]llvm.Value // local variables
+	locals            map[ssa.Value]llvm.Value            // local variables
-	blockInfo         []blockInfo
+	blockEntries      map[*ssa.BasicBlock]llvm.BasicBlock // a *ssa.BasicBlock may be split up
+	blockExits        map[*ssa.BasicBlock]llvm.BasicBlock // these are the exit blocks
 	currentBlock      *ssa.BasicBlock
-	currentBlockInfo  *blockInfo
-	tarjanStack       []uint
-	tarjanIndex       uint
 	phis              []phiNode
 	deferPtr          llvm.Value
 	deferFrame        llvm.Value
@@ -189,22 +186,11 @@ func newBuilder(c *compilerContext, irbuilder llvm.Builder, f *ssa.Function) *bu
 		info:            c.getFunctionInfo(f),
 		locals:          make(map[ssa.Value]llvm.Value),
 		dilocals:        make(map[*types.Var]llvm.Metadata),
+		blockEntries:    make(map[*ssa.BasicBlock]llvm.BasicBlock),
+		blockExits:      make(map[*ssa.BasicBlock]llvm.BasicBlock),
 	}
 }
 
-type blockInfo struct {
-	// entry is the LLVM basic block corresponding to the start of this *ssa.Block.
-	entry llvm.BasicBlock
-
-	// exit is the LLVM basic block corresponding to the end of this *ssa.Block.
-	// It will be different than entry if any of the block's instructions contain internal branches.
-	exit llvm.BasicBlock
-
-	// tarjan holds state for applying Tarjan's strongly connected components algorithm to the CFG.
-	// This is used by defer.go to determine whether to stack- or heap-allocate defer data.
-	tarjan tarjanNode
-}
-
 type deferBuiltin struct {
 	callName string
 	pos      token.Pos
@@ -402,7 +388,7 @@ func (c *compilerContext) getLLVMType(goType types.Type) llvm.Type {
 // makeLLVMType creates a LLVM type for a Go type. Don't call this, use
 // getLLVMType instead.
 func (c *compilerContext) makeLLVMType(goType types.Type) llvm.Type {
-	switch typ := types.Unalias(goType).(type) {
+	switch typ := goType.(type) {
 	case *types.Array:
 		elemType := c.getLLVMType(typ.Elem())
 		return llvm.ArrayType(elemType, int(typ.Len()))
@@ -510,21 +496,6 @@ func (c *compilerContext) createDIType(typ types.Type) llvm.Metadata {
 	llvmType := c.getLLVMType(typ)
 	sizeInBytes := c.targetData.TypeAllocSize(llvmType)
 	switch typ := typ.(type) {
-	case *types.Alias:
-		// Implement types.Alias just like types.Named: by treating them like a
-		// C typedef.
-		temporaryMDNode := c.dibuilder.CreateReplaceableCompositeType(llvm.Metadata{}, llvm.DIReplaceableCompositeType{
-			Tag:         dwarf.TagTypedef,
-			SizeInBits:  sizeInBytes * 8,
-			AlignInBits: uint32(c.targetData.ABITypeAlignment(llvmType)) * 8,
-		})
-		c.ditypes[typ] = temporaryMDNode
-		md := c.dibuilder.CreateTypedef(llvm.DITypedef{
-			Type: c.getDIType(types.Unalias(typ)), // TODO: use typ.Rhs in Go 1.23
-			Name: typ.String(),
-		})
-		temporaryMDNode.ReplaceAllUsesWith(md)
-		return md
 	case *types.Array:
 		return c.dibuilder.CreateArrayType(llvm.DIArrayType{
 			SizeInBits:  sizeInBytes * 8,
@@ -873,10 +844,6 @@ func (c *compilerContext) createPackage(irbuilder llvm.Builder, pkg *ssa.Package
 				// with a LLVM intrinsic.
 				continue
 			}
-			if ok := b.defineCryptoIntrinsic(); ok {
-				// Body of this function was replaced
-				continue
-			}
 			if member.Blocks == nil {
 				// Try to define this as an intrinsic function.
 				b.defineIntrinsicFunction()
@@ -891,11 +858,6 @@ func (c *compilerContext) createPackage(irbuilder llvm.Builder, pkg *ssa.Package
 				// Interfaces don't have concrete methods.
 				continue
 			}
-			if _, isalias := member.Type().(*types.Alias); isalias {
-				// Aliases don't need to be redefined, since they just refer to
-				// an already existing type whose methods will be defined.
-				continue
-			}
 
 			// Named type. We should make sure all methods are created.
 			// This includes both functions with pointer receivers and those
@@ -1237,29 +1199,14 @@ func (b *builder) createFunctionStart(intrinsic bool) {
 		// intrinsic (like an atomic operation). Create the entry block
 		// manually.
 		entryBlock = b.ctx.AddBasicBlock(b.llvmFn, "entry")
-		// Intrinsics may create internal branches (e.g. nil checks).
-		// They will attempt to access b.currentBlockInfo to update the exit block.
-		// Create some fake block info for them to access.
-		blockInfo := []blockInfo{
-			{
-				entry: entryBlock,
-				exit:  entryBlock,
-			},
-		}
-		b.blockInfo = blockInfo
-		b.currentBlockInfo = &blockInfo[0]
 	} else {
-		blocks := b.fn.Blocks
-		blockInfo := make([]blockInfo, len(blocks))
 		for _, block := range b.fn.DomPreorder() {
-			info := &blockInfo[block.Index]
 			llvmBlock := b.ctx.AddBasicBlock(b.llvmFn, block.Comment)
-			info.entry = llvmBlock
+			b.blockEntries[block] = llvmBlock
-			info.exit = llvmBlock
+			b.blockExits[block] = llvmBlock
 		}
-		b.blockInfo = blockInfo
 		// Normal functions have an entry block.
-		entryBlock = blockInfo[0].entry
+		entryBlock = b.blockEntries[b.fn.Blocks[0]]
 	}
 	b.SetInsertPointAtEnd(entryBlock)
 
@@ -1355,9 +1302,8 @@ func (b *builder) createFunction() {
 		if b.DumpSSA {
 			fmt.Printf("%d: %s:\n", block.Index, block.Comment)
 		}
+		b.SetInsertPointAtEnd(b.blockEntries[block])
 		b.currentBlock = block
-		b.currentBlockInfo = &b.blockInfo[block.Index]
-		b.SetInsertPointAtEnd(b.currentBlockInfo.entry)
 		for _, instr := range block.Instrs {
 			if instr, ok := instr.(*ssa.DebugRef); ok {
 				if !b.Debug {
@@ -1417,7 +1363,7 @@ func (b *builder) createFunction() {
 		block := phi.ssa.Block()
 		for i, edge := range phi.ssa.Edges {
 			llvmVal := b.getValue(edge, getPos(phi.ssa))
-			llvmBlock := b.blockInfo[block.Preds[i].Index].exit
+			llvmBlock := b.blockExits[block.Preds[i]]
 			phi.llvm.AddIncoming([]llvm.Value{llvmVal}, []llvm.BasicBlock{llvmBlock})
 		}
 	}
@@ -1531,11 +1477,11 @@ func (b *builder) createInstruction(instr ssa.Instruction) {
 	case *ssa.If:
 		cond := b.getValue(instr.Cond, getPos(instr))
 		block := instr.Block()
-		blockThen := b.blockInfo[block.Succs[0].Index].entry
+		blockThen := b.blockEntries[block.Succs[0]]
-		blockElse := b.blockInfo[block.Succs[1].Index].entry
+		blockElse := b.blockEntries[block.Succs[1]]
 		b.CreateCondBr(cond, blockThen, blockElse)
 	case *ssa.Jump:
-		blockJump := b.blockInfo[instr.Block().Succs[0].Index].entry
+		blockJump := b.blockEntries[instr.Block().Succs[0]]
 		b.CreateBr(blockJump)
 	case *ssa.MapUpdate:
 		m := b.getValue(instr.Map, getPos(instr))
@@ -1603,8 +1549,7 @@ func (b *builder) createBuiltin(argTypes []types.Type, argValues []llvm.Value, c
 		elemsLen := b.CreateExtractValue(elems, 1, "append.elemsLen")
 		elemType := b.getLLVMType(argTypes[0].Underlying().(*types.Slice).Elem())
 		elemSize := llvm.ConstInt(b.uintptrType, b.targetData.TypeAllocSize(elemType), false)
-		elemLayout := b.createObjectLayout(elemType, pos)
+		result := b.createRuntimeCall("sliceAppend", []llvm.Value{srcBuf, elemsBuf, srcLen, srcCap, elemsLen, elemSize}, "append.new")
-		result := b.createRuntimeCall("sliceAppend", []llvm.Value{srcBuf, elemsBuf, srcLen, srcCap, elemsLen, elemSize, elemLayout}, "append.new")
 		newPtr := b.CreateExtractValue(result, 0, "append.newPtr")
 		newLen := b.CreateExtractValue(result, 1, "append.newLen")
 		newCap := b.CreateExtractValue(result, 2, "append.newCap")
@@ -1686,41 +1631,13 @@ func (b *builder) createBuiltin(argTypes []types.Type, argValues []llvm.Value, c
 	case "copy":
 		dst := argValues[0]
 		src := argValues[1]
-		// Fetch the lengths.
 		dstLen := b.CreateExtractValue(dst, 1, "copy.dstLen")
 		srcLen := b.CreateExtractValue(src, 1, "copy.srcLen")
-		// Find the minimum of the lengths.
+		dstBuf := b.CreateExtractValue(dst, 0, "copy.dstArray")
-		minFuncName := "llvm.umin.i" + strconv.Itoa(b.uintptrType.IntTypeWidth())
+		srcBuf := b.CreateExtractValue(src, 0, "copy.srcArray")
-		minFunc := b.mod.NamedFunction(minFuncName)
-		if minFunc.IsNil() {
-			fnType := llvm.FunctionType(b.uintptrType, []llvm.Type{b.uintptrType, b.uintptrType}, false)
-			minFunc = llvm.AddFunction(b.mod, minFuncName, fnType)
-		}
-		minLen := b.CreateCall(minFunc.GlobalValueType(), minFunc, []llvm.Value{dstLen, srcLen}, "copy.n")
-		// Multiply the length by the element size.
 		elemType := b.getLLVMType(argTypes[0].Underlying().(*types.Slice).Elem())
 		elemSize := llvm.ConstInt(b.uintptrType, b.targetData.TypeAllocSize(elemType), false)
-		// NOTE: This is also NSW when uintptr is int, but we can only choose one through the C API?
+		return b.createRuntimeCall("sliceCopy", []llvm.Value{dstBuf, srcBuf, dstLen, srcLen, elemSize}, "copy.n"), nil
-		size := b.CreateNUWMul(minLen, elemSize, "copy.size")
-		// Fetch the pointers.
-		dstBuf := b.CreateExtractValue(dst, 0, "copy.dstPtr")
-		srcBuf := b.CreateExtractValue(src, 0, "copy.srcPtr")
-		// Create a memcpy.
-		call := b.createMemCopy("memmove", dstBuf, srcBuf, size)
-		align := b.targetData.ABITypeAlignment(elemType)
-		if align > 1 {
-			// Apply the type's alignment to the arguments.
-			// LLVM sometimes turns constant-length moves into loads and stores.
-			// It may use this alignment for the created loads and stores.
-			alignAttr := b.ctx.CreateEnumAttribute(llvm.AttributeKindID("align"), uint64(align))
-			call.AddCallSiteAttribute(1, alignAttr)
-			call.AddCallSiteAttribute(2, alignAttr)
-		}
-		// Extend and return the copied length.
-		if b.targetData.TypeAllocSize(minLen.Type()) < b.targetData.TypeAllocSize(b.intType) {
-			minLen = b.CreateZExt(minLen, b.intType, "copy.n.zext")
-		}
-		return minLen, nil
 	case "delete":
 		m := argValues[0]
 		key := argValues[1]
@@ -1748,66 +1665,20 @@ func (b *builder) createBuiltin(argTypes []types.Type, argValues []llvm.Value, c
 		return llvmLen, nil
 	case "min", "max":
 		// min and max builtins, added in Go 1.21.
-		// Find the corresponding intrinsic name.
+		// We can simply reuse the existing binop comparison code, which has all
-		ty := argTypes[0].Underlying().(*types.Basic)
+		// the edge cases figured out already.
-		llvmType := b.getLLVMType(ty)
+		tok := token.LSS
-		info := ty.Info()
+		if callName == "max" {
-		var prefix, delimeter, typeName string
+			tok = token.GTR
-		if info&types.IsInteger != 0 {
-			// This is an integer value.
-			// Use the LLVM int min/max intrinsics.
-			prefix = "llvm.s"
-			if info&types.IsUnsigned != 0 {
-				prefix = "llvm.u"
-			}
-			delimeter = ".i"
-			typeName = strconv.Itoa(llvmType.IntTypeWidth())
-		} else {
-			switch ty.Kind() {
-			case types.String:
-				// Strings do not have an equivalent intrinsic.
-				// Implement with compares and selects.
-				tok := token.LSS
-				if callName == "max" {
-					tok = token.GTR
-				}
-				result := argValues[0]
-				typ := argTypes[0]
-				for _, arg := range argValues[1:] {
-					cmp, err := b.createBinOp(tok, typ, typ, result, arg, pos)
-					if err != nil {
-						return result, err
-					}
-					result = b.CreateSelect(cmp, result, arg, "")
-				}
-				return result, nil
-			case types.Float32:
-				typeName = "f32"
-			case types.Float64:
-				typeName = "f64"
-			default:
-				return llvm.Value{}, b.makeError(pos, "todo: min/max: unknown type")
-			}
-			// There are a few edge cases with floating point min/max:
-			// min(-0.0, +0.0) = -0.0
-			// min(NaN, number) = NaN
-			// The llvm.minimum.*/llvm.maximum.* intrinsics match this behavior.
-			// Neither Go nor LLVM defines the bit representation of resulting NaNs.
-			prefix = "llvm."
-			delimeter = "imum."
 		}
-		intrinsicName := prefix + callName + delimeter + typeName
-		// Find or create the intrinsic.
-		llvmFn := b.mod.NamedFunction(intrinsicName)
-		if llvmFn.IsNil() {
-			fnType := llvm.FunctionType(llvmType, []llvm.Type{llvmType, llvmType}, false)
-			llvmFn = llvm.AddFunction(b.mod, intrinsicName, fnType)
-		}
-		// Call the intrinsic repeatedly to merge the arguments.
-		callType := llvmFn.GlobalValueType()
 		result := argValues[0]
+		typ := argTypes[0]
 		for _, arg := range argValues[1:] {
-			result = b.CreateCall(callType, llvmFn, []llvm.Value{result, arg}, "")
+			cmp, err := b.createBinOp(tok, typ, typ, result, arg, pos)
+			if err != nil {
+				return result, err
+			}
+			result = b.CreateSelect(cmp, result, arg, "")
 		}
 		return result, nil
 	case "panic":
@@ -1964,7 +1835,15 @@ func (b *builder) createBuiltin(argTypes []types.Type, argValues []llvm.Value, c
 //
 // This is also where compiler intrinsics are implemented.
 func (b *builder) createFunctionCall(instr *ssa.CallCommon) (llvm.Value, error) {
-	// See if this is an intrinsic function that is handled specially.
+	var params []llvm.Value
+	for _, param := range instr.Args {
+		params = append(params, b.getValue(param, getPos(instr)))
+	}
+
+	// Try to call the function directly for trivially static calls.
+	var callee, context llvm.Value
+	var calleeType llvm.Type
+	exported := false
 	if fn := instr.StaticCallee(); fn != nil {
 		// Direct function call, either to a named or anonymous (directly
 		// applied) function call. If it is anonymous, it may be a closure.
@@ -1980,14 +1859,10 @@ func (b *builder) createFunctionCall(instr *ssa.CallCommon) (llvm.Value, error)
 			return b.emitSV64Call(instr.Args, getPos(instr))
 		case strings.HasPrefix(name, "(device/riscv.CSR)."):
 			return b.emitCSROperation(instr)
-		case (strings.HasPrefix(name, "syscall.Syscall") || strings.HasPrefix(name, "syscall.RawSyscall") || strings.HasPrefix(name, "golang.org/x/sys/unix.Syscall") || strings.HasPrefix(name, "golang.org/x/sys/unix.RawSyscall")) && name != "syscall.SyscallN":
+		case strings.HasPrefix(name, "syscall.Syscall") || strings.HasPrefix(name, "syscall.RawSyscall") || strings.HasPrefix(name, "golang.org/x/sys/unix.Syscall") || strings.HasPrefix(name, "golang.org/x/sys/unix.RawSyscall"):
 			if b.GOOS != "darwin" {
 				return b.createSyscall(instr)
 			}
-		case name == "syscall.syscalln":
-			if b.GOOS == "windows" {
-				return b.createSyscalln(instr)
-			}
 		case strings.HasPrefix(name, "syscall.rawSyscallNoError") || strings.HasPrefix(name, "golang.org/x/sys/unix.RawSyscallNoError"):
 			return b.createRawSyscallNoError(instr)
 		case name == "runtime.supportsRecover":
@@ -2004,29 +1879,13 @@ func (b *builder) createFunctionCall(instr *ssa.CallCommon) (llvm.Value, error)
 			return llvm.ConstInt(b.ctx.Int8Type(), panicStrategy, false), nil
 		case name == "runtime/interrupt.New":
 			return b.createInterruptGlobal(instr)
-		case name == "runtime.exportedFuncPtr":
-			_, ptr := b.getFunction(instr.Args[0].(*ssa.Function))
-			return b.CreatePtrToInt(ptr, b.uintptrType, ""), nil
-		case name == "(*runtime/interrupt.Checkpoint).Save":
-			return b.createInterruptCheckpoint(instr.Args[0]), nil
 		case name == "internal/abi.FuncPCABI0":
 			retval := b.createDarwinFuncPCABI0Call(instr)
 			if !retval.IsNil() {
 				return retval, nil
 			}
 		}
-	}
 
-	var params []llvm.Value
-	for _, param := range instr.Args {
-		params = append(params, b.getValue(param, getPos(instr)))
-	}
-
-	// Try to call the function directly for trivially static calls.
-	var callee, context llvm.Value
-	var calleeType llvm.Type
-	exported := false
-	if fn := instr.StaticCallee(); fn != nil {
 		calleeType, callee = b.getFunction(fn)
 		info := b.getFunctionInfo(fn)
 		if callee.IsNil() {

compiler/defer.go

@@ -100,14 +100,13 @@ func (b *builder) createLandingPad() {
 
 	// Continue at the 'recover' block, which returns to the parent in an
 	// appropriate way.
-	b.CreateBr(b.blockInfo[b.fn.Recover.Index].entry)
+	b.CreateBr(b.blockEntries[b.fn.Recover])
 }
 
-// Create a checkpoint (similar to setjmp). This emits inline assembly that
+// createInvokeCheckpoint saves the function state at the given point, to
-// stores the current program counter inside the ptr address (actually
+// continue at the landing pad if a panic happened. This is implemented using a
-// ptr+sizeof(ptr)) and then returns a boolean indicating whether this is the
+// setjmp-like construct.
-// normal flow (false) or we jumped here from somewhere else (true).
+func (b *builder) createInvokeCheckpoint() {
-func (b *builder) createCheckpoint(ptr llvm.Value) llvm.Value {
 	// Construct inline assembly equivalents of setjmp.
 	// The assembly works as follows:
 	//   * All registers (both callee-saved and caller saved) are clobbered
@@ -218,124 +217,49 @@ li a0, 0
 		// 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.dataPtrType}, false)
+	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{ptr}, "setjmp")
+	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")
-	return isZero
-}
-
-// 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() {
-	isZero := b.createCheckpoint(b.deferFrame)
 	continueBB := b.insertBasicBlock("")
 	b.CreateCondBr(isZero, continueBB, b.landingpad)
 	b.SetInsertPointAtEnd(continueBB)
-	b.currentBlockInfo.exit = continueBB
+	b.blockExits[b.currentBlock] = continueBB
 }
 
-// isInLoop checks if there is a path from the current block to itself.
+// isInLoop checks if there is a path from a basic block to itself.
-// Use Tarjan's strongly connected components algorithm to search for cycles.
+func isInLoop(start *ssa.BasicBlock) bool {
-// A one-node SCC is a cycle iff there is an edge from the node to itself.
+	// Use a breadth-first search to scan backwards through the block graph.
-// A multi-node SCC is always a cycle.
+	queue := []*ssa.BasicBlock{start}
-// https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm
+	checked := map[*ssa.BasicBlock]struct{}{}
-func (b *builder) isInLoop() bool {
-	if b.currentBlockInfo.tarjan.lowLink == 0 {
-		b.strongConnect(b.currentBlock)
-	}
-	return b.currentBlockInfo.tarjan.cyclic
-}
 
-func (b *builder) strongConnect(block *ssa.BasicBlock) {
+	for len(queue) > 0 {
-	// Assign a new index.
+		// pop a block off of the queue
-	// Indices start from 1 so that 0 can be used as a sentinel.
+		block := queue[len(queue)-1]
-	assignedIndex := b.tarjanIndex + 1
+		queue = queue[:len(queue)-1]
-	b.tarjanIndex = assignedIndex
 
-	// Apply the new index.
+		// Search through predecessors.
-	blockIndex := block.Index
+		// Searching backwards means that this is pretty fast when the block is close to the start of the function.
-	node := &b.blockInfo[blockIndex].tarjan
+		// Defers are often placed near the start of the function.
-	node.lowLink = assignedIndex
+		for _, pred := range block.Preds {
-
+			if pred == start {
-	// Push the node onto the stack.
+				// cycle found
-	node.onStack = true
+				return true
-	b.tarjanStack = append(b.tarjanStack, uint(blockIndex))
-
-	// Process the successors.
-	for _, successor := range block.Succs {
-		// Look up the successor's state.
-		successorIndex := successor.Index
-		if successorIndex == blockIndex {
-			// Handle a self-cycle specially.
-			node.cyclic = true
-			continue
-		}
-		successorNode := &b.blockInfo[successorIndex].tarjan
-
-		switch {
-		case successorNode.lowLink == 0:
-			// This node has not yet been visisted.
-			b.strongConnect(successor)
-
-		case !successorNode.onStack:
-			// This node has been visited, but is in a different SCC.
-			// Ignore it, and do not update lowLink.
-			continue
-		}
-
-		// Update the lowLink index.
-		// This always uses the min-of-lowlink instead of using index in the on-stack case.
-		// This is done for two reasons:
-		// 1. The lowLink update can be shared between the new-node and on-stack cases.
-		// 2. The assigned index does not need to be saved - it is only needed for root node detection.
-		if successorNode.lowLink < node.lowLink {
-			node.lowLink = successorNode.lowLink
-		}
-	}
-
-	if node.lowLink == assignedIndex {
-		// This is a root node.
-		// Pop the SCC off the stack.
-		stack := b.tarjanStack
-		top := stack[len(stack)-1]
-		stack = stack[:len(stack)-1]
-		blocks := b.blockInfo
-		topNode := &blocks[top].tarjan
-		topNode.onStack = false
-
-		if top != uint(blockIndex) {
-			// The root node is not the only node in the SCC.
-			// Mark all nodes in this SCC as cyclic.
-			topNode.cyclic = true
-			for top != uint(blockIndex) {
-				top = stack[len(stack)-1]
-				stack = stack[:len(stack)-1]
-				topNode = &blocks[top].tarjan
-				topNode.onStack = false
-				topNode.cyclic = true
 			}
+
+			if _, ok := checked[pred]; ok {
+				// block already checked
+				continue
+			}
+
+			// add to queue and checked map
+			queue = append(queue, pred)
+			checked[pred] = struct{}{}
 		}
-
-		b.tarjanStack = stack
 	}
-}
 
-// tarjanNode holds per-block state for isInLoop and strongConnect.
+	return false
-type tarjanNode struct {
-	// lowLink is the index of the first visited node that is reachable from this block.
-	// The lowLink indices are assigned by the SCC search, and do not correspond to b.Index.
-	// A lowLink of 0 is used as a sentinel to mark a node which has not yet been visited.
-	lowLink uint
-
-	// onStack tracks whether this node is currently on the SCC search stack.
-	onStack bool
-
-	// cyclic indicates whether this block is in a loop.
-	// If lowLink is 0, strongConnect must be called before reading this field.
-	cyclic bool
 }
 
 // createDefer emits a single defer instruction, to be run when this function
@@ -477,10 +401,7 @@ func (b *builder) createDefer(instr *ssa.Defer) {
 
 	// Put this struct in an allocation.
 	var alloca llvm.Value
-	if instr.Block() != b.currentBlock {
+	if !isInLoop(instr.Block()) {
-		panic("block mismatch")
-	}
-	if !b.isInLoop() {
 		// This can safely use a stack allocation.
 		alloca = llvmutil.CreateEntryBlockAlloca(b.Builder, deferredCallType, "defer.alloca")
 	} else {

compiler/gc.go

@@ -99,9 +99,6 @@ func typeHasPointers(t llvm.Type) bool {
 		}
 		return false
 	case llvm.ArrayTypeKind:
-		if t.ArrayLength() == 0 {
-			return false
-		}
 		if typeHasPointers(t.ElementType()) {
 			return true
 		}

compiler/inlineasm.go

@@ -38,10 +38,10 @@ func (b *builder) createInlineAsm(args []ssa.Value) (llvm.Value, error) {
 // provided immediately. For example:
 //
 //	arm.AsmFull(
-//	    "str {value}, [{result}]",
+//	    "str {value}, {result}",
 //	    map[string]interface{}{
-//	        "value":  1,
+//	        "value":  1
-//	        "result": uintptr(unsafe.Pointer(&dest)),
+//	        "result": &dest,
 //	    })
 func (b *builder) createInlineAsmFull(instr *ssa.CallCommon) (llvm.Value, error) {
 	asmString := constant.StringVal(instr.Args[0].(*ssa.Const).Value)
@@ -249,15 +249,3 @@ func (b *builder) emitCSROperation(call *ssa.CallCommon) (llvm.Value, error) {
 		return llvm.Value{}, b.makeError(call.Pos(), "unknown CSR operation: "+name)
 	}
 }
-
-// Implement runtime/interrupt.Checkpoint.Save. It needs to be implemented
-// directly at the call site. If it isn't implemented directly at the call site
-// (but instead through a function call), it might result in an overwritten
-// stack in the non-jump return case.
-func (b *builder) createInterruptCheckpoint(ptr ssa.Value) llvm.Value {
-	addr := b.getValue(ptr, ptr.Pos())
-	b.createNilCheck(ptr, addr, "deref")
-	stackPointer := b.readStackPointer()
-	b.CreateStore(stackPointer, addr)
-	return b.createCheckpoint(addr)
-}

compiler/interface.go

@@ -10,7 +10,6 @@ import (
 	"fmt"
 	"go/token"
 	"go/types"
-	"sort"
 	"strconv"
 	"strings"
 
@@ -18,12 +17,6 @@ import (
 	"tinygo.org/x/go-llvm"
 )
 
-// numMethodHasMethodSet is a flag in bit 15 of the numMethod field (uint16) in
-// Named, Pointer, and Struct type descriptors. When set, an inline method set
-// is present in the type descriptor. Must match the constant in
-// src/internal/reflectlite/type.go.
-const numMethodHasMethodSet = 0x8000
-
 // Type kinds for basic types.
 // They must match the constants for the Kind type in src/reflect/type.go.
 var basicTypes = [...]uint8{
@@ -129,9 +122,6 @@ func (c *compilerContext) pkgPathPtr(pkgpath string) llvm.Value {
 // This function returns a pointer to the 'kind' field (which might not be the
 // first field in the struct).
 func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
-	// Resolve alias types: alias types are resolved at compile time.
-	typ = types.Unalias(typ)
-
 	ms := c.program.MethodSets.MethodSet(typ)
 	hasMethodSet := ms.Len() != 0
 	_, isInterface := typ.Underlying().(*types.Interface)
@@ -190,16 +180,6 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 		typeFieldTypes := []*types.Var{
 			types.NewVar(token.NoPos, nil, "kind", types.Typ[types.Int8]),
 		}
-		// Compute the method set value for types that support methods.
-		var methods []*types.Func
-		for i := 0; i < ms.Len(); i++ {
-			methods = append(methods, ms.At(i).Obj().(*types.Func))
-		}
-		methodSetType := types.NewStruct([]*types.Var{
-			types.NewVar(token.NoPos, nil, "length", types.Typ[types.Uintptr]),
-			types.NewVar(token.NoPos, nil, "methods", types.NewArray(types.Typ[types.UnsafePointer], int64(len(methods)))),
-		}, nil)
-		methodSetValue := c.getMethodSetValue(methods)
 		switch typ := typ.(type) {
 		case *types.Basic:
 			typeFieldTypes = append(typeFieldTypes,
@@ -216,13 +196,6 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 				types.NewVar(token.NoPos, nil, "ptrTo", types.Typ[types.UnsafePointer]),
 				types.NewVar(token.NoPos, nil, "underlying", types.Typ[types.UnsafePointer]),
 				types.NewVar(token.NoPos, nil, "pkgpath", types.Typ[types.UnsafePointer]),
-			)
-			if len(methods) > 0 {
-				typeFieldTypes = append(typeFieldTypes,
-					types.NewVar(token.NoPos, nil, "methods", methodSetType),
-				)
-			}
-			typeFieldTypes = append(typeFieldTypes,
 				types.NewVar(token.NoPos, nil, "name", types.NewArray(types.Typ[types.Int8], int64(len(pkgname)+1+len(name)+1))),
 			)
 		case *types.Chan:
@@ -242,11 +215,6 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 				types.NewVar(token.NoPos, nil, "numMethods", types.Typ[types.Uint16]),
 				types.NewVar(token.NoPos, nil, "elementType", types.Typ[types.UnsafePointer]),
 			)
-			if len(methods) > 0 {
-				typeFieldTypes = append(typeFieldTypes,
-					types.NewVar(token.NoPos, nil, "methods", methodSetType),
-				)
-			}
 		case *types.Array:
 			typeFieldTypes = append(typeFieldTypes,
 				types.NewVar(token.NoPos, nil, "numMethods", types.Typ[types.Uint16]),
@@ -271,16 +239,11 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 				types.NewVar(token.NoPos, nil, "numFields", types.Typ[types.Uint16]),
 				types.NewVar(token.NoPos, nil, "fields", types.NewArray(c.getRuntimeType("structField"), int64(typ.NumFields()))),
 			)
-			if len(methods) > 0 {
-				typeFieldTypes = append(typeFieldTypes,
-					types.NewVar(token.NoPos, nil, "methods", methodSetType),
-				)
-			}
 		case *types.Interface:
 			typeFieldTypes = append(typeFieldTypes,
 				types.NewVar(token.NoPos, nil, "ptrTo", types.Typ[types.UnsafePointer]),
-				types.NewVar(token.NoPos, nil, "methods", methodSetType),
 			)
+			// TODO: methods
 		case *types.Signature:
 			typeFieldTypes = append(typeFieldTypes,
 				types.NewVar(token.NoPos, nil, "ptrTo", types.Typ[types.UnsafePointer]),
@@ -326,24 +289,14 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 				pkgname = pkg.Name()
 			}
 			pkgPathPtr := c.pkgPathPtr(pkgpath)
-			namedNumMethods := uint64(numMethods)
-			if namedNumMethods&numMethodHasMethodSet != 0 {
-				panic("numMethods overflow: too many exported methods on named type " + name)
-			}
-			if len(methods) > 0 {
-				namedNumMethods |= numMethodHasMethodSet
-			}
 			typeFields = []llvm.Value{
-				llvm.ConstInt(c.ctx.Int16Type(), namedNumMethods, false), // numMethods
+				llvm.ConstInt(c.ctx.Int16Type(), uint64(numMethods), false), // numMethods
-				c.getTypeCode(types.NewPointer(typ)),                     // ptrTo
+				c.getTypeCode(types.NewPointer(typ)),                        // ptrTo
-				c.getTypeCode(typ.Underlying()),                          // underlying
+				c.getTypeCode(typ.Underlying()),                             // underlying
-				pkgPathPtr,                                               // pkgpath pointer
+				pkgPathPtr,                                                  // pkgpath pointer
+				c.ctx.ConstString(pkgname+"."+name+"\x00", false),           // name
 			}
-			if len(methods) > 0 {
+			metabyte |= 1 << 5 // "named" flag
-				typeFields = append(typeFields, methodSetValue) // methods
-			}
-			typeFields = append(typeFields, c.ctx.ConstString(pkgname+"."+name+"\x00", false)) // name
-			metabyte |= 1 << 5                                                                 // "named" flag
 		case *types.Chan:
 			var dir reflectChanDir
 			switch typ.Dir() {
@@ -367,20 +320,10 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 				c.getTypeCode(typ.Elem()),                  // elementType
 			}
 		case *types.Pointer:
-			ptrNumMethods := uint64(numMethods)
-			if ptrNumMethods&numMethodHasMethodSet != 0 {
-				panic("numMethods overflow: too many exported methods on pointer type")
-			}
-			if len(methods) > 0 {
-				ptrNumMethods |= numMethodHasMethodSet
-			}
 			typeFields = []llvm.Value{
-				llvm.ConstInt(c.ctx.Int16Type(), ptrNumMethods, false), // numMethods
+				llvm.ConstInt(c.ctx.Int16Type(), uint64(numMethods), false), // numMethods
 				c.getTypeCode(typ.Elem()),
 			}
-			if len(methods) > 0 {
-				typeFields = append(typeFields, methodSetValue)
-			}
 		case *types.Array:
 			typeFields = []llvm.Value{
 				llvm.ConstInt(c.ctx.Int16Type(), 0, false),             // numMethods
@@ -407,16 +350,9 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 
 			llvmStructType := c.getLLVMType(typ)
 			size := c.targetData.TypeStoreSize(llvmStructType)
-			structNumMethods := uint64(numMethods)
-			if structNumMethods&numMethodHasMethodSet != 0 {
-				panic("numMethods overflow: too many exported methods on struct type")
-			}
-			if len(methods) > 0 {
-				structNumMethods |= numMethodHasMethodSet
-			}
 			typeFields = []llvm.Value{
-				llvm.ConstInt(c.ctx.Int16Type(), structNumMethods, false), // numMethods
+				llvm.ConstInt(c.ctx.Int16Type(), uint64(numMethods), false), // numMethods
-				c.getTypeCode(types.NewPointer(typ)),                      // ptrTo
+				c.getTypeCode(types.NewPointer(typ)),                        // ptrTo
 				pkgPathPtr,
 				llvm.ConstInt(c.ctx.Int32Type(), uint64(size), false),            // size
 				llvm.ConstInt(c.ctx.Int16Type(), uint64(typ.NumFields()), false), // numFields
@@ -468,14 +404,9 @@ func (c *compilerContext) getTypeCode(typ types.Type) llvm.Value {
 				}))
 			}
 			typeFields = append(typeFields, llvm.ConstArray(structFieldType, fields))
-			if len(methods) > 0 {
-				typeFields = append(typeFields, methodSetValue)
-			}
 		case *types.Interface:
-			typeFields = []llvm.Value{
+			typeFields = []llvm.Value{c.getTypeCode(types.NewPointer(typ))}
-				c.getTypeCode(types.NewPointer(typ)),
+			// TODO: methods
-				methodSetValue,
-			}
 		case *types.Signature:
 			typeFields = []llvm.Value{c.getTypeCode(types.NewPointer(typ))}
 			// TODO: params, return values, etc
@@ -581,7 +512,7 @@ var basicTypeNames = [...]string{
 // interface lowering pass to assign type codes as expected by the reflect
 // package. See getTypeCodeNum.
 func getTypeCodeName(t types.Type) (string, bool) {
-	switch t := types.Unalias(t).(type) {
+	switch t := t.(type) {
 	case *types.Named:
 		if t.Obj().Parent() != t.Obj().Pkg().Scope() {
 			return "named:" + t.String() + "$local", true
@@ -762,11 +693,17 @@ func (b *builder) createTypeAssert(expr *ssa.TypeAssert) llvm.Value {
 			// This type assertion always succeeds, so we can just set commaOk to true.
 			commaOk = llvm.ConstInt(b.ctx.Int1Type(), 1, true)
 		} else {
-			// Type assert on an interface type with methods.
+			// Type assert on interface type with methods.
-			// Create a call to a declared-but-not-defined function that will
+			// This is a call to an interface type assert function.
-			// be lowered by the interface lowering pass into a type-ID
+			// The interface lowering pass will define this function by filling it
-			// comparison chain.
+			// with a type switch over all concrete types that implement this
-			commaOk = b.createInterfaceTypeAssert(intf, actualTypeNum)
+			// interface, and returning whether it's one of the matched types.
+			// This is very different from how interface asserts are implemented in
+			// the main Go compiler, where the runtime checks whether the type
+			// implements each method of the interface. See:
+			// https://research.swtch.com/interfaces
+			fn := b.getInterfaceImplementsFunc(expr.AssertedType)
+			commaOk = b.CreateCall(fn.GlobalValueType(), fn, []llvm.Value{actualTypeNum}, "")
 		}
 	} else {
 		name, _ := getTypeCodeName(expr.AssertedType)
@@ -797,7 +734,7 @@ func (b *builder) createTypeAssert(expr *ssa.TypeAssert) llvm.Value {
 	prevBlock := b.GetInsertBlock()
 	okBlock := b.insertBasicBlock("typeassert.ok")
 	nextBlock := b.insertBasicBlock("typeassert.next")
-	b.currentBlockInfo.exit = nextBlock // adjust outgoing block for phi nodes
+	b.blockExits[b.currentBlock] = nextBlock // adjust outgoing block for phi nodes
 	b.CreateCondBr(commaOk, okBlock, nextBlock)
 
 	// Retrieve the value from the interface if the type assert was
@@ -843,58 +780,20 @@ func (c *compilerContext) getMethodsString(itf *types.Interface) string {
 	return strings.Join(methods, "; ")
 }
 
-// getMethodSetValue creates the method set struct value for a list of methods.
+// getInterfaceImplementsFunc returns a declared function that works as a type
-// The struct contains a length and a sorted array of method signature pointers.
+// switch. The interface lowering pass will define this function.
-func (c *compilerContext) getMethodSetValue(methods []*types.Func) llvm.Value {
+func (c *compilerContext) getInterfaceImplementsFunc(assertedType types.Type) llvm.Value {
-	// Create a sorted list of method signature global names.
+	s, _ := getTypeCodeName(assertedType.Underlying())
-	type methodRef struct {
+	fnName := s + ".$typeassert"
-		name  string
+	llvmFn := c.mod.NamedFunction(fnName)
-		value llvm.Value
+	if llvmFn.IsNil() {
+		llvmFnType := llvm.FunctionType(c.ctx.Int1Type(), []llvm.Type{c.dataPtrType}, false)
+		llvmFn = llvm.AddFunction(c.mod, fnName, llvmFnType)
+		c.addStandardDeclaredAttributes(llvmFn)
+		methods := c.getMethodsString(assertedType.Underlying().(*types.Interface))
+		llvmFn.AddFunctionAttr(c.ctx.CreateStringAttribute("tinygo-methods", methods))
 	}
-	var refs []methodRef
+	return llvmFn
-	for _, method := range methods {
-		name := method.Name()
-		if !token.IsExported(name) {
-			name = method.Pkg().Path() + "." + name
-		}
-		s, _ := getTypeCodeName(method.Type())
-		globalName := "reflect/types.signature:" + name + ":" + s
-		value := c.mod.NamedGlobal(globalName)
-		if value.IsNil() {
-			value = llvm.AddGlobal(c.mod, c.ctx.Int8Type(), globalName)
-			value.SetInitializer(llvm.ConstNull(c.ctx.Int8Type()))
-			value.SetGlobalConstant(true)
-			value.SetLinkage(llvm.LinkOnceODRLinkage)
-			value.SetAlignment(1)
-			if c.Debug {
-				file := c.getDIFile("<Go type>")
-				diglobal := c.dibuilder.CreateGlobalVariableExpression(file, llvm.DIGlobalVariableExpression{
-					Name:        globalName,
-					File:        file,
-					Line:        1,
-					Type:        c.getDIType(types.Typ[types.Uint8]),
-					LocalToUnit: false,
-					Expr:        c.dibuilder.CreateExpression(nil),
-					AlignInBits: 8,
-				})
-				value.AddMetadata(0, diglobal)
-			}
-		}
-		refs = append(refs, methodRef{globalName, value})
-	}
-	sort.Slice(refs, func(i, j int) bool {
-		return refs[i].name < refs[j].name
-	})
-
-	var values []llvm.Value
-	for _, ref := range refs {
-		values = append(values, ref.value)
-	}
-
-	return c.ctx.ConstStruct([]llvm.Value{
-		llvm.ConstInt(c.uintptrType, uint64(len(values)), false),
-		llvm.ConstArray(c.dataPtrType, values),
-	}, false)
 }
 
 // getInvokeFunction returns the thunk to call the given interface method. The
@@ -921,24 +820,6 @@ func (c *compilerContext) getInvokeFunction(instr *ssa.CallCommon) llvm.Value {
 	return llvmFn
 }
 
-// createInterfaceTypeAssert creates a call to a declared-but-not-defined
-// $typeassert function for the given interface. This function will be defined
-// by the interface lowering pass as a type-ID comparison chain, avoiding the
-// need for runtime.typeImplementsMethodSet at compile time.
-func (b *builder) createInterfaceTypeAssert(intf *types.Interface, actualType llvm.Value) llvm.Value {
-	s, _ := getTypeCodeName(intf)
-	fnName := s + ".$typeassert"
-	llvmFn := b.mod.NamedFunction(fnName)
-	if llvmFn.IsNil() {
-		llvmFnType := llvm.FunctionType(b.ctx.Int1Type(), []llvm.Type{b.dataPtrType}, false)
-		llvmFn = llvm.AddFunction(b.mod, fnName, llvmFnType)
-		b.addStandardDeclaredAttributes(llvmFn)
-		methods := b.getMethodsString(intf)
-		llvmFn.AddFunctionAttr(b.ctx.CreateStringAttribute("tinygo-methods", methods))
-	}
-	return b.CreateCall(llvmFn.GlobalValueType(), llvmFn, []llvm.Value{actualType}, "")
-}
-
 // getInterfaceInvokeWrapper returns a wrapper for the given method so it can be
 // invoked from an interface. The wrapper takes in a pointer to the underlying
 // value, dereferences or unpacks it if necessary, and calls the real method.
@@ -1061,7 +942,7 @@ func signature(sig *types.Signature) string {
 // normalization around `byte` vs `uint8` for example.
 func typestring(t types.Type) string {
 	// See: https://github.com/golang/go/blob/master/src/go/types/typestring.go
-	switch t := types.Unalias(t).(type) {
+	switch t := t.(type) {
 	case *types.Array:
 		return "[" + strconv.FormatInt(t.Len(), 10) + "]" + typestring(t.Elem())
 	case *types.Basic:

compiler/intrinsics.go

@@ -27,8 +27,6 @@ func (b *builder) defineIntrinsicFunction() {
 		b.createStackSaveImpl()
 	case name == "runtime.KeepAlive":
 		b.createKeepAliveImpl()
-	case name == "machine.keepAliveNoEscape":
-		b.createMachineKeepAliveImpl()
 	case strings.HasPrefix(name, "runtime/volatile.Load"):
 		b.createVolatileLoad()
 	case strings.HasPrefix(name, "runtime/volatile.Store"):
@@ -50,24 +48,19 @@ func (b *builder) defineIntrinsicFunction() {
 // and will otherwise be lowered to regular libc memcpy/memmove calls.
 func (b *builder) createMemoryCopyImpl() {
 	b.createFunctionStart(true)
-	params := b.fn.Params[0:3]
+	fnName := "llvm." + b.fn.Name() + ".p0.p0.i" + strconv.Itoa(b.uintptrType.IntTypeWidth())
-	b.createMemCopy(
-		b.fn.Name(),
-		b.getValue(params[0], getPos(b.fn)),
-		b.getValue(params[1], getPos(b.fn)),
-		b.getValue(params[2], getPos(b.fn)),
-	)
-	b.CreateRetVoid()
-}
-
-func (b *builder) createMemCopy(kind string, dst, src, len llvm.Value) llvm.Value {
-	fnName := "llvm." + kind + ".p0.p0.i" + strconv.Itoa(b.uintptrType.IntTypeWidth())
 	llvmFn := b.mod.NamedFunction(fnName)
 	if llvmFn.IsNil() {
 		fnType := llvm.FunctionType(b.ctx.VoidType(), []llvm.Type{b.dataPtrType, b.dataPtrType, b.uintptrType, b.ctx.Int1Type()}, false)
 		llvmFn = llvm.AddFunction(b.mod, fnName, fnType)
 	}
-	return b.CreateCall(llvmFn.GlobalValueType(), llvmFn, []llvm.Value{dst, src, len, llvm.ConstInt(b.ctx.Int1Type(), 0, false)}, "")
+	var params []llvm.Value
+	for _, param := range b.fn.Params {
+		params = append(params, b.getValue(param, getPos(b.fn)))
+	}
+	params = append(params, llvm.ConstInt(b.ctx.Int1Type(), 0, false))
+	b.CreateCall(llvmFn.GlobalValueType(), llvmFn, params, "")
+	b.CreateRetVoid()
 }
 
 // createMemoryZeroImpl creates calls to llvm.memset.* to zero a block of
@@ -128,43 +121,6 @@ func (b *builder) createKeepAliveImpl() {
 	b.CreateRetVoid()
 }
 
-// createAbiEscapeImpl implements the generic internal/abi.Escape function. It
-// currently only supports pointer types.
-func (b *builder) createAbiEscapeImpl() {
-	b.createFunctionStart(true)
-
-	// The first parameter is assumed to be a pointer. This is checked at the
-	// call site of createAbiEscapeImpl.
-	pointerValue := b.getValue(b.fn.Params[0], getPos(b.fn))
-
-	// Create an equivalent of the following C code, which is basically just a
-	// nop but ensures the pointerValue is kept alive:
-	//
-	//     __asm__ __volatile__("" : : "r"(pointerValue))
-	//
-	// It should be portable to basically everything as the "r" register type
-	// exists basically everywhere.
-	asmType := llvm.FunctionType(b.dataPtrType, []llvm.Type{b.dataPtrType}, false)
-	asmFn := llvm.InlineAsm(asmType, "", "=r,0", true, false, 0, false)
-	result := b.createCall(asmType, asmFn, []llvm.Value{pointerValue}, "")
-
-	b.CreateRet(result)
-}
-
-// Implement machine.keepAliveNoEscape, which makes sure the compiler keeps the
-// pointer parameter alive until this point (for GC).
-func (b *builder) createMachineKeepAliveImpl() {
-	b.createFunctionStart(true)
-	pointerValue := b.getValue(b.fn.Params[0], getPos(b.fn))
-
-	// See createKeepAliveImpl for details.
-	asmType := llvm.FunctionType(b.ctx.VoidType(), []llvm.Type{b.dataPtrType}, false)
-	asmFn := llvm.InlineAsm(asmType, "", "r", true, false, 0, false)
-	b.createCall(asmType, asmFn, []llvm.Value{pointerValue}, "")
-
-	b.CreateRetVoid()
-}
-
 var mathToLLVMMapping = map[string]string{
 	"math.Ceil":  "llvm.ceil.f64",
 	"math.Exp":   "llvm.exp.f64",
@@ -208,23 +164,6 @@ func (b *builder) defineMathOp() {
 	b.CreateRet(result)
 }
 
-func (b *builder) defineCryptoIntrinsic() bool {
-	if b.fn.Pkg.Pkg.Path() != "crypto/internal/constanttime" {
-		return false
-	}
-
-	switch b.fn.Name() {
-	case "boolToUint8":
-		b.createFunctionStart(true)
-		param := b.getValue(b.fn.Params[0], b.fn.Pos())
-		result := b.CreateZExt(param, b.ctx.Int8Type(), "")
-		b.CreateRet(result)
-		return true
-	}
-
-	return false
-}
-
 // Implement most math/bits functions.
 //
 // This implements all the functions that operate on bits. It does not yet

compiler/llvm.go

@@ -1,10 +1,10 @@
 package compiler
 
 import (
-	"encoding/binary"
 	"fmt"
 	"go/token"
 	"go/types"
+	"math/big"
 	"strings"
 
 	"github.com/tinygo-org/tinygo/compileopts"
@@ -231,12 +231,6 @@ func (c *compilerContext) makeGlobalArray(buf []byte, name string, elementType l
 //
 // For details on what's in this value, see src/runtime/gc_precise.go.
 func (c *compilerContext) createObjectLayout(t llvm.Type, pos token.Pos) llvm.Value {
-	if !typeHasPointers(t) {
-		// There are no pointers in this type, so we can simplify the layout.
-		layout := (uint64(1) << 1) | 1
-		return llvm.ConstIntToPtr(llvm.ConstInt(c.uintptrType, layout, false), c.dataPtrType)
-	}
-
 	// Use the element type for arrays. This works even for nested arrays.
 	for {
 		kind := t.TypeKind()
@@ -254,29 +248,54 @@ func (c *compilerContext) createObjectLayout(t llvm.Type, pos token.Pos) llvm.Va
 		break
 	}
 
-	// Create the pointer bitmap.
+	// Do a few checks to see whether we need to generate any object layout
+	// information at all.
 	objectSizeBytes := c.targetData.TypeAllocSize(t)
-	pointerAlignment := uint64(c.targetData.PrefTypeAlignment(c.dataPtrType))
-	bitmapLen := objectSizeBytes / pointerAlignment
-	bitmapBytes := (bitmapLen + 7) / 8
-	bitmap := make([]byte, bitmapBytes, max(bitmapBytes, 8))
-	c.buildPointerBitmap(bitmap, pointerAlignment, pos, t, 0)
-
-	// Try to encode the layout inline.
 	pointerSize := c.targetData.TypeAllocSize(c.dataPtrType)
-	pointerBits := pointerSize * 8
+	pointerAlignment := c.targetData.PrefTypeAlignment(c.dataPtrType)
-	if bitmapLen < pointerBits {
+	if objectSizeBytes < pointerSize {
-		rawMask := binary.LittleEndian.Uint64(bitmap[0:8])
+		// Too small to contain a pointer.
-		layout := rawMask*pointerBits + bitmapLen
+		layout := (uint64(1) << 1) | 1
-		layout <<= 1
+		return llvm.ConstIntToPtr(llvm.ConstInt(c.uintptrType, layout, false), c.dataPtrType)
-		layout |= 1
+	}
+	bitmap := c.getPointerBitmap(t, pos)
+	if bitmap.BitLen() == 0 {
+		// There are no pointers in this type, so we can simplify the layout.
+		// TODO: this can be done in many other cases, e.g. when allocating an
+		// array (like [4][]byte, which repeats a slice 4 times).
+		layout := (uint64(1) << 1) | 1
+		return llvm.ConstIntToPtr(llvm.ConstInt(c.uintptrType, layout, false), c.dataPtrType)
+	}
+	if objectSizeBytes%uint64(pointerAlignment) != 0 {
+		// This shouldn't happen except for packed structs, which aren't
+		// currently used.
+		c.addError(pos, "internal error: unexpected object size for object with pointer field")
+		return llvm.ConstNull(c.dataPtrType)
+	}
+	objectSizeWords := objectSizeBytes / uint64(pointerAlignment)
 
-		// Check if the layout fits.
+	pointerBits := pointerSize * 8
-		layout &= 1<<pointerBits - 1
+	var sizeFieldBits uint64
-		if (layout>>1)/pointerBits == rawMask {
+	switch pointerBits {
-			// No set bits were shifted off.
+	case 16:
-			return llvm.ConstIntToPtr(llvm.ConstInt(c.uintptrType, layout, false), c.dataPtrType)
+		sizeFieldBits = 4
-		}
+	case 32:
+		sizeFieldBits = 5
+	case 64:
+		sizeFieldBits = 6
+	default:
+		panic("unknown pointer size")
+	}
+	layoutFieldBits := pointerBits - 1 - sizeFieldBits
+
+	// Try to emit the value as an inline integer. This is possible in most
+	// cases.
+	if objectSizeWords < layoutFieldBits {
+		// If it can be stored directly in the pointer value, do so.
+		// The runtime knows that if the least significant bit of the pointer is
+		// set, the pointer contains the value itself.
+		layout := bitmap.Uint64()<<(sizeFieldBits+1) | (objectSizeWords << 1) | 1
+		return llvm.ConstIntToPtr(llvm.ConstInt(c.uintptrType, layout, false), c.dataPtrType)
 	}
 
 	// Unfortunately, the object layout is too big to fit in a pointer-sized
@@ -284,24 +303,25 @@ func (c *compilerContext) createObjectLayout(t llvm.Type, pos token.Pos) llvm.Va
 
 	// Try first whether the global already exists. All objects with a
 	// particular name have the same type, so this is possible.
-	globalName := "runtime/gc.layout:" + fmt.Sprintf("%d-%0*x", bitmapLen, (bitmapLen+15)/16, bitmap)
+	globalName := "runtime/gc.layout:" + fmt.Sprintf("%d-%0*x", objectSizeWords, (objectSizeWords+15)/16, bitmap)
 	global := c.mod.NamedGlobal(globalName)
 	if !global.IsNil() {
 		return global
 	}
 
 	// Create the global initializer.
-	bitmapByteValues := make([]llvm.Value, bitmapBytes)
+	bitmapBytes := make([]byte, int(objectSizeWords+7)/8)
-	i8 := c.ctx.Int8Type()
+	bitmap.FillBytes(bitmapBytes)
-	for i, b := range bitmap {
+	reverseBytes(bitmapBytes) // big-endian to little-endian
-		bitmapByteValues[i] = llvm.ConstInt(i8, uint64(b), false)
+	var bitmapByteValues []llvm.Value
+	for _, b := range bitmapBytes {
+		bitmapByteValues = append(bitmapByteValues, llvm.ConstInt(c.ctx.Int8Type(), uint64(b), false))
 	}
 	initializer := c.ctx.ConstStruct([]llvm.Value{
-		llvm.ConstInt(c.uintptrType, bitmapLen, false),
+		llvm.ConstInt(c.uintptrType, objectSizeWords, false),
-		llvm.ConstArray(i8, bitmapByteValues),
+		llvm.ConstArray(c.ctx.Int8Type(), bitmapByteValues),
 	}, false)
 
-	// Create the actual global.
 	global = llvm.AddGlobal(c.mod, initializer.Type(), globalName)
 	global.SetInitializer(initializer)
 	global.SetUnnamedAddr(true)
@@ -309,7 +329,6 @@ func (c *compilerContext) createObjectLayout(t llvm.Type, pos token.Pos) llvm.Va
 	global.SetLinkage(llvm.LinkOnceODRLinkage)
 	if c.targetData.PrefTypeAlignment(c.uintptrType) < 2 {
 		// AVR doesn't have alignment by default.
-		// The lowest bit must be unset to distinguish this from an inline layout.
 		global.SetAlignment(2)
 	}
 	if c.Debug && pos != token.NoPos {
@@ -341,71 +360,59 @@ func (c *compilerContext) createObjectLayout(t llvm.Type, pos token.Pos) llvm.Va
 	return global
 }
 
-// buildPointerBitmap scans the given LLVM type for pointers and sets bits in a
+// getPointerBitmap scans the given LLVM type for pointers and sets bits in a
-// bitmap at the word offset that contains a pointer. This scan is recursive.
+// bigint at the word offset that contains a pointer. This scan is recursive.
-func (c *compilerContext) buildPointerBitmap(
+func (c *compilerContext) getPointerBitmap(typ llvm.Type, pos token.Pos) *big.Int {
-	dst []byte,
+	alignment := c.targetData.PrefTypeAlignment(c.dataPtrType)
-	ptrAlign uint64,
+	switch typ.TypeKind() {
-	pos token.Pos,
-	t llvm.Type,
-	offset uint64,
-) {
-	switch t.TypeKind() {
 	case llvm.IntegerTypeKind, llvm.FloatTypeKind, llvm.DoubleTypeKind:
-		// These types do not contain pointers.
+		return big.NewInt(0)
-
 	case llvm.PointerTypeKind:
-		// Set the corresponding position in the bitmap.
+		return big.NewInt(1)
-		dst[offset/8] |= 1 << (offset % 8)
-
 	case llvm.StructTypeKind:
-		// Recurse over struct elements.
+		ptrs := big.NewInt(0)
-		for i, et := range t.StructElementTypes() {
+		if typ.StructName() == "runtime.funcValue" {
-			eo := c.targetData.ElementOffset(t, i)
+			// Hack: the type runtime.funcValue contains an 'id' field which is
-			if eo%uint64(ptrAlign) != 0 {
+			// of type uintptr, but before the LowerFuncValues pass it actually
-				if typeHasPointers(et) {
+			// contains a pointer (ptrtoint) to a global. This trips up the
-					// This error will let the compilation fail, but by continuing
+			// interp package. Therefore, make the id field a pointer for now.
-					// the error can still easily be shown.
+			typ = c.ctx.StructType([]llvm.Type{c.dataPtrType, c.dataPtrType}, false)
-					c.addError(pos, "internal error: allocated struct contains unaligned pointer")
+		}
-				}
+		for i, subtyp := range typ.StructElementTypes() {
+			subptrs := c.getPointerBitmap(subtyp, pos)
+			if subptrs.BitLen() == 0 {
 				continue
 			}
-			c.buildPointerBitmap(
+			offset := c.targetData.ElementOffset(typ, i)
-				dst,
+			if offset%uint64(alignment) != 0 {
-				ptrAlign,
+				// This error will let the compilation fail, but by continuing
-				pos,
+				// the error can still easily be shown.
-				et,
+				c.addError(pos, "internal error: allocated struct contains unaligned pointer")
-				offset+(eo/ptrAlign),
+				continue
-			)
-		}
-
-	case llvm.ArrayTypeKind:
-		// Recurse over array elements.
-		len := t.ArrayLength()
-		if len <= 0 {
-			return
-		}
-		et := t.ElementType()
-		elementSize := c.targetData.TypeAllocSize(et)
-		if elementSize%ptrAlign != 0 {
-			if typeHasPointers(et) {
-				// This error will let the compilation fail (but continues so that
-				// other errors can be shown).
-				c.addError(pos, "internal error: allocated array contains unaligned pointer")
 			}
-			return
+			subptrs.Lsh(subptrs, uint(offset)/uint(alignment))
+			ptrs.Or(ptrs, subptrs)
 		}
-		elementSize /= ptrAlign
+		return ptrs
-		for i := 0; i < len; i++ {
+	case llvm.ArrayTypeKind:
-			c.buildPointerBitmap(
+		subtyp := typ.ElementType()
-				dst,
+		subptrs := c.getPointerBitmap(subtyp, pos)
-				ptrAlign,
+		ptrs := big.NewInt(0)
-				pos,
+		if subptrs.BitLen() == 0 {
-				et,
+			return ptrs
-				offset+uint64(i)*elementSize,
-			)
 		}
-
+		elementSize := c.targetData.TypeAllocSize(subtyp)
+		if elementSize%uint64(alignment) != 0 {
+			// This error will let the compilation fail (but continues so that
+			// other errors can be shown).
+			c.addError(pos, "internal error: allocated array contains unaligned pointer")
+			return ptrs
+		}
+		for i := 0; i < typ.ArrayLength(); i++ {
+			ptrs.Lsh(ptrs, uint(elementSize)/uint(alignment))
+			ptrs.Or(ptrs, subptrs)
+		}
+		return ptrs
 	default:
 		// Should not happen.
 		panic("unknown LLVM type")
@@ -452,21 +459,6 @@ func (b *builder) readStackPointer() llvm.Value {
 	return b.CreateCall(stacksave.GlobalValueType(), stacksave, nil, "")
 }
 
-// writeStackPointer emits a LLVM intrinsic call that updates the current stack
-// pointer.
-func (b *builder) writeStackPointer(sp llvm.Value) {
-	name := "llvm.stackrestore.p0"
-	if llvmutil.Version() < 18 {
-		name = "llvm.stackrestore" // backwards compatibility with LLVM 17 and below
-	}
-	stackrestore := b.mod.NamedFunction(name)
-	if stackrestore.IsNil() {
-		fnType := llvm.FunctionType(b.ctx.VoidType(), []llvm.Type{b.dataPtrType}, false)
-		stackrestore = llvm.AddFunction(b.mod, name, fnType)
-	}
-	b.CreateCall(stackrestore.GlobalValueType(), stackrestore, []llvm.Value{sp}, "")
-}
-
 // createZExtOrTrunc lets the input value fit in the output type bits, by zero
 // extending or truncating the integer.
 func (b *builder) createZExtOrTrunc(value llvm.Value, t llvm.Type) llvm.Value {

compiler/llvmutil/llvm.go

@@ -218,7 +218,7 @@ func Version() int {
 	return major
 }
 
-// ByteOrder returns the byte order for the given target triple. Most targets are little
+// Return the byte order for the given target triple. Most targets are little
 // endian, but for example MIPS can be big-endian.
 func ByteOrder(target string) binary.ByteOrder {
 	if strings.HasPrefix(target, "mips-") {

compiler/map.go

@@ -248,11 +248,8 @@ func (b *builder) createMapIteratorNext(rangeVal ssa.Value, llvmRangeVal, it llv
 // can be compared with runtime.memequal.  Note that padding bytes are undef
 // and can alter two "equal" structs being equal when compared with memequal.
 func hashmapIsBinaryKey(keyType types.Type) bool {
-	switch keyType := keyType.Underlying().(type) {
+	switch keyType := keyType.(type) {
 	case *types.Basic:
-		// TODO: unsafe.Pointer is also a binary key, but to support that we
-		// need to fix an issue with interp first (see
-		// https://github.com/tinygo-org/tinygo/pull/4898).
 		return keyType.Info()&(types.IsBoolean|types.IsInteger) != 0
 	case *types.Pointer:
 		return true
@@ -266,6 +263,8 @@ func hashmapIsBinaryKey(keyType types.Type) bool {
 		return true
 	case *types.Array:
 		return hashmapIsBinaryKey(keyType.Elem())
+	case *types.Named:
+		return hashmapIsBinaryKey(keyType.Underlying())
 	default:
 		return false
 	}

compiler/symbol.go

@@ -142,11 +142,6 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 			nocapture := c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0)
 			llvmFn.AddAttributeAtIndex(i+1, nocapture)
 		}
-		if paramInfo.flags&paramIsReadonly != 0 && paramInfo.llvmType.TypeKind() == llvm.PointerTypeKind {
-			// Readonly pointer parameters (like strings) benefit from being marked as readonly.
-			readonly := c.ctx.CreateEnumAttribute(llvm.AttributeKindID("readonly"), 0)
-			llvmFn.AddAttributeAtIndex(i+1, readonly)
-		}
 	}
 
 	// Set a number of function or parameter attributes, depending on the
@@ -159,8 +154,6 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 		llvmFn.AddFunctionAttr(c.ctx.CreateEnumAttribute(llvm.AttributeKindID("noreturn"), 0))
 	case "internal/abi.NoEscape":
 		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
-	case "machine.keepAliveNoEscape", "machine.unsafeNoEscape":
-		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
 	case "runtime.alloc":
 		// Tell the optimizer that runtime.alloc is an allocator, meaning that it
 		// returns values that are never null and never alias to an existing value.
@@ -184,6 +177,12 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 		// be modified.
 		llvmFn.AddAttributeAtIndex(2, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
 		llvmFn.AddAttributeAtIndex(2, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("readonly"), 0))
+	case "runtime.sliceCopy":
+		// Copying a slice won't capture any of the parameters.
+		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("writeonly"), 0))
+		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
+		llvmFn.AddAttributeAtIndex(2, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("readonly"), 0))
+		llvmFn.AddAttributeAtIndex(2, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
 	case "runtime.stringFromBytes":
 		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("nocapture"), 0))
 		llvmFn.AddAttributeAtIndex(1, c.ctx.CreateEnumAttribute(llvm.AttributeKindID("readonly"), 0))
@@ -209,12 +208,6 @@ func (c *compilerContext) getFunction(fn *ssa.Function) (llvm.Type, llvm.Value)
 			// > circumstances, and should not be exposed to source languages.
 			llvmutil.AppendToGlobal(c.mod, "llvm.compiler.used", llvmFn)
 		}
-	case "GetModuleHandleExA", "GetProcAddress", "GetSystemInfo", "GetSystemTimeAsFileTime", "LoadLibraryExW", "QueryPerformanceCounter", "QueryPerformanceFrequency", "QueryUnbiasedInterruptTime", "SetEnvironmentVariableA", "Sleep", "SystemFunction036", "VirtualAlloc":
-		// On Windows we need to use a special calling convention for some
-		// external calls.
-		if c.GOOS == "windows" && c.GOARCH == "386" {
-			llvmFn.SetFunctionCallConv(llvm.X86StdcallCallConv)
-		}
 	}
 
 	// External/exported functions may not retain pointer values.
@@ -254,23 +247,6 @@ func (c *compilerContext) maybeCreateSyntheticFunction(fn *ssa.Function, llvmFn
 	// The exception is the package initializer, which does appear in the
 	// *ssa.Package members and so shouldn't be created here.
 	if fn.Synthetic != "" && fn.Synthetic != "package initializer" && fn.Synthetic != "generic function" && fn.Synthetic != "range-over-func yield" {
-		if origin := fn.Origin(); origin != nil && origin.RelString(nil) == "internal/abi.Escape" {
-			// This is a special implementation or internal/abi.Escape, which
-			// can only really be implemented in the compiler.
-			// For simplicity we'll only implement pointer parameters for now.
-			if _, ok := fn.Params[0].Type().Underlying().(*types.Pointer); ok {
-				irbuilder := c.ctx.NewBuilder()
-				defer irbuilder.Dispose()
-				b := newBuilder(c, irbuilder, fn)
-				b.createAbiEscapeImpl()
-				llvmFn.SetLinkage(llvm.LinkOnceODRLinkage)
-				llvmFn.SetUnnamedAddr(true)
-			}
-			// If the parameter is not of a pointer type, it will be left
-			// unimplemented. This will result in a linker error if the function
-			// is really called, making it clear it needs to be implemented.
-			return
-		}
 		if len(fn.Blocks) == 0 {
 			c.addError(fn.Pos(), "missing function body")
 			return
@@ -462,10 +438,6 @@ func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
 			}
 		}
 	}
-
-	if c.Nobounds {
-		info.nobounds = true
-	}
 }
 
 // Check whether this function can be used in //go:wasmimport or
@@ -474,7 +446,7 @@ func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
 // The list of allowed types is based on this proposal:
 // https://github.com/golang/go/issues/59149
 func (c *compilerContext) checkWasmImportExport(f *ssa.Function, pragma string) {
-	if c.pkg.Path() == "runtime" || c.pkg.Path() == "syscall/js" || c.pkg.Path() == "syscall" || c.pkg.Path() == "crypto/internal/sysrand" {
+	if c.pkg.Path() == "runtime" || c.pkg.Path() == "syscall/js" || c.pkg.Path() == "syscall" {
 		// The runtime is a special case. Allow all kinds of parameters
 		// (importantly, including pointers).
 		return
@@ -540,7 +512,7 @@ func (c *compilerContext) isValidWasmType(typ types.Type, site wasmSite) bool {
 		}
 		for i := 0; i < typ.NumFields(); i++ {
 			ftyp := typ.Field(i).Type()
-			if types.Unalias(ftyp).String() == "structs.HostLayout" {
+			if ftyp.String() == "structs.HostLayout" {
 				hasHostLayout = true
 				continue
 			}
@@ -631,7 +603,7 @@ func (c *compilerContext) addStandardAttributes(llvmFn llvm.Value) {
 // linkName is equal to .RelString(nil) on a global and extern is false, but for
 // some symbols this is different (due to //go:extern for example).
 type globalInfo struct {
-	linkName string // go:extern, go:linkname
+	linkName string // go:extern
 	extern   bool   // go:extern
 	align    int    // go:align
 	section  string // go:section
@@ -716,20 +688,25 @@ func (c *compilerContext) getGlobalInfo(g *ssa.Global) globalInfo {
 	// Check for //go: pragmas, which may change the link name (among others).
 	doc := c.astComments[info.linkName]
 	if doc != nil {
-		info.parsePragmas(doc, c, g)
+		info.parsePragmas(doc, g)
 	}
 	return info
 }
 
 // Parse //go: pragma comments from the source. In particular, it parses the
-// //go:extern and //go:linkname pragmas on globals.
+// //go:extern pragma on globals.
-func (info *globalInfo) parsePragmas(doc *ast.CommentGroup, c *compilerContext, g *ssa.Global) {
+func (info *globalInfo) parsePragmas(doc *ast.CommentGroup, g *ssa.Global) {
 	for _, comment := range doc.List {
 		if !strings.HasPrefix(comment.Text, "//go:") {
 			continue
 		}
 		parts := strings.Fields(comment.Text)
 		switch parts[0] {
+		case "//go:linkname":
+			if len(parts) == 3 && g.Name() == parts[1] {
+				info.linkName = parts[2]
+				info.extern = true
+			}
 		case "//go:extern":
 			info.extern = true
 			if len(parts) == 2 {
@@ -744,17 +721,6 @@ func (info *globalInfo) parsePragmas(doc *ast.CommentGroup, c *compilerContext,
 			if len(parts) == 2 {
 				info.section = parts[1]
 			}
-		case "//go:linkname":
-			if len(parts) != 3 || parts[1] != g.Name() {
-				continue
-			}
-			// Only enable go:linkname when the package imports "unsafe".
-			// This is a slightly looser requirement than what gc uses: gc
-			// requires the file to import "unsafe", not the package as a
-			// whole.
-			if hasUnsafeImport(g.Pkg.Pkg) {
-				info.linkName = parts[2]
-			}
 		}
 	}
 }

compiler/syscall.go

@@ -74,14 +74,6 @@ func (b *builder) createRawSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		return b.CreateCall(fnType, target, args, ""), nil
 
 	case b.GOARCH == "arm" && b.GOOS == "linux":
-		if arch := b.archFamily(); arch != "arm" {
-			// Some targets pretend to be linux/arm for compatibility but aren't
-			// actually such a system. Make sure we emit an error instead of
-			// creating inline assembly that will fail to compile.
-			// See: https://github.com/tinygo-org/tinygo/issues/4959
-			return llvm.Value{}, b.makeError(call.Pos(), "system calls are not supported: target emulates a linux/arm system on "+arch)
-		}
-
 		// Implement the EABI system call convention for Linux.
 		// Source: syscall(2) man page.
 		args := []llvm.Value{}
@@ -276,8 +268,6 @@ func (b *builder) createSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		// The signature looks like this:
 		//   func Syscall(trap, nargs, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
 
-		isI386 := strings.HasPrefix(b.Triple, "i386-")
-
 		// Prepare input values.
 		var paramTypes []llvm.Type
 		var params []llvm.Value
@@ -295,17 +285,11 @@ func (b *builder) createSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		if setLastError.IsNil() {
 			llvmType := llvm.FunctionType(b.ctx.VoidType(), []llvm.Type{b.ctx.Int32Type()}, false)
 			setLastError = llvm.AddFunction(b.mod, "SetLastError", llvmType)
-			if isI386 {
-				setLastError.SetFunctionCallConv(llvm.X86StdcallCallConv)
-			}
 		}
 		getLastError := b.mod.NamedFunction("GetLastError")
 		if getLastError.IsNil() {
 			llvmType := llvm.FunctionType(b.ctx.Int32Type(), nil, false)
 			getLastError = llvm.AddFunction(b.mod, "GetLastError", llvmType)
-			if isI386 {
-				getLastError.SetFunctionCallConv(llvm.X86StdcallCallConv)
-			}
 		}
 
 		// Now do the actual call. Pseudocode:
@@ -316,24 +300,9 @@ func (b *builder) createSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 		// Note that SetLastError/GetLastError could be replaced with direct
 		// access to the thread control block, which is probably smaller and
 		// faster. The Go runtime does this in assembly.
-		// On windows/386, we also need to save/restore the stack pointer. I'm
+		b.CreateCall(setLastError.GlobalValueType(), setLastError, []llvm.Value{llvm.ConstNull(b.ctx.Int32Type())}, "")
-		// not entirely sure why this is needed, but without it these calls
-		// change the stack pointer leading to a crash soon after.
-		setLastErrorCall := b.CreateCall(setLastError.GlobalValueType(), setLastError, []llvm.Value{llvm.ConstNull(b.ctx.Int32Type())}, "")
-		var sp llvm.Value
-		if isI386 {
-			setLastErrorCall.SetInstructionCallConv(llvm.X86StdcallCallConv)
-			sp = b.readStackPointer()
-		}
 		syscallResult := b.CreateCall(llvmType, fnPtr, params, "")
-		if isI386 {
-			syscallResult.SetInstructionCallConv(llvm.X86StdcallCallConv)
-			b.writeStackPointer(sp)
-		}
 		errResult := b.CreateCall(getLastError.GlobalValueType(), getLastError, nil, "err")
-		if isI386 {
-			errResult.SetInstructionCallConv(llvm.X86StdcallCallConv)
-		}
 		if b.uintptrType != b.ctx.Int32Type() {
 			errResult = b.CreateZExt(errResult, b.uintptrType, "err.uintptr")
 		}
@@ -349,130 +318,6 @@ func (b *builder) createSyscall(call *ssa.CallCommon) (llvm.Value, error) {
 	}
 }
 
-// createSyscalln emits instructions for the syscall.syscalln function on
-// Windows. This handles the variadic calling convention used in Go 1.26+:
-//
-//	func syscalln(fn, n uintptr, args ...uintptr) (r1, r2 uintptr, err Errno)
-//
-// The function generates a switch on n to dispatch to the correct fixed-argument
-// function pointer call with SetLastError(0)/GetLastError() wrapping.
-func (b *builder) createSyscalln(call *ssa.CallCommon) (llvm.Value, error) {
-	const maxArgs = 18 // Windows syscalls support up to 18 args
-
-	isI386 := strings.HasPrefix(b.Triple, "i386-")
-
-	// Get the function pointer (call.Args[0]) and n (call.Args[1]).
-	fn := b.getValue(call.Args[0], getPos(call))
-	fnPtr := b.CreateIntToPtr(fn, b.dataPtrType, "")
-	n := b.getValue(call.Args[1], getPos(call))
-
-	// Get the variadic args slice (call.Args[2]).
-	// In SSA, the variadic slice is the third argument.
-	var argsPtr llvm.Value
-	if len(call.Args) > 2 {
-		argsSlice := b.getValue(call.Args[2], getPos(call))
-		argsPtr = b.CreateExtractValue(argsSlice, 0, "args.data")
-	} else {
-		argsPtr = llvm.ConstNull(b.dataPtrType)
-	}
-
-	// Prepare SetLastError and GetLastError.
-	setLastError := b.mod.NamedFunction("SetLastError")
-	if setLastError.IsNil() {
-		llvmType := llvm.FunctionType(b.ctx.VoidType(), []llvm.Type{b.ctx.Int32Type()}, false)
-		setLastError = llvm.AddFunction(b.mod, "SetLastError", llvmType)
-		if isI386 {
-			setLastError.SetFunctionCallConv(llvm.X86StdcallCallConv)
-		}
-	}
-	getLastError := b.mod.NamedFunction("GetLastError")
-	if getLastError.IsNil() {
-		llvmType := llvm.FunctionType(b.ctx.Int32Type(), nil, false)
-		getLastError = llvm.AddFunction(b.mod, "GetLastError", llvmType)
-		if isI386 {
-			getLastError.SetFunctionCallConv(llvm.X86StdcallCallConv)
-		}
-	}
-
-	retType := b.ctx.StructType([]llvm.Type{b.uintptrType, b.uintptrType, b.uintptrType}, false)
-
-	// Create the merge block where all cases converge.
-	mergeBB := b.insertBasicBlock("syscalln.merge")
-
-	// Create the default (panic) block.
-	panicBB := b.insertBasicBlock("syscalln.panic")
-
-	// Create the switch on n.
-	sw := b.CreateSwitch(n, panicBB, maxArgs+1)
-
-	// We'll collect blocks and values for the PHI node.
-	var incomingVals []llvm.Value
-	var incomingBlocks []llvm.BasicBlock
-
-	// Generate a case for each arg count 0..maxArgs.
-	for i := 0; i <= maxArgs; i++ {
-		caseBB := b.insertBasicBlock("syscalln.case" + strconv.Itoa(i))
-		sw.AddCase(llvm.ConstInt(b.uintptrType, uint64(i), false), caseBB)
-		b.SetInsertPointAtEnd(caseBB)
-
-		// Load args[0] through args[i-1] from the slice data pointer.
-		var params []llvm.Value
-		var paramTypes []llvm.Type
-		for j := 0; j < i; j++ {
-			gep := b.CreateInBoundsGEP(b.uintptrType, argsPtr, []llvm.Value{
-				llvm.ConstInt(b.ctx.Int32Type(), uint64(j), false),
-			}, "")
-			arg := b.CreateLoad(b.uintptrType, gep, "")
-			params = append(params, arg)
-			paramTypes = append(paramTypes, b.uintptrType)
-		}
-
-		// SetLastError(0)
-		setCall := b.CreateCall(setLastError.GlobalValueType(), setLastError, []llvm.Value{llvm.ConstNull(b.ctx.Int32Type())}, "")
-		var sp llvm.Value
-		if isI386 {
-			setCall.SetInstructionCallConv(llvm.X86StdcallCallConv)
-			sp = b.readStackPointer()
-		}
-
-		// Call fn(args...)
-		fnType := llvm.FunctionType(b.uintptrType, paramTypes, false)
-		syscallResult := b.CreateCall(fnType, fnPtr, params, "")
-		if isI386 {
-			syscallResult.SetInstructionCallConv(llvm.X86StdcallCallConv)
-			b.writeStackPointer(sp)
-		}
-
-		// err = GetLastError()
-		errResult := b.CreateCall(getLastError.GlobalValueType(), getLastError, nil, "err")
-		if isI386 {
-			errResult.SetInstructionCallConv(llvm.X86StdcallCallConv)
-		}
-		if b.uintptrType != b.ctx.Int32Type() {
-			errResult = b.CreateZExt(errResult, b.uintptrType, "err.uintptr")
-		}
-
-		// Build {r1, 0, err}
-		result := llvm.ConstNull(retType)
-		result = b.CreateInsertValue(result, syscallResult, 0, "")
-		result = b.CreateInsertValue(result, errResult, 2, "")
-
-		incomingVals = append(incomingVals, result)
-		incomingBlocks = append(incomingBlocks, b.Builder.GetInsertBlock())
-		b.CreateBr(mergeBB)
-	}
-
-	// Panic block for n > maxArgs.
-	b.SetInsertPointAtEnd(panicBB)
-	b.CreateUnreachable()
-
-	// Merge block: PHI node to select the result.
-	b.SetInsertPointAtEnd(mergeBB)
-	phi := b.CreatePHI(retType, "syscalln.result")
-	phi.AddIncoming(incomingVals, incomingBlocks)
-	return phi, nil
-}
-
 // createRawSyscallNoError emits instructions for the Linux-specific
 // syscall.rawSyscallNoError function.
 func (b *builder) createRawSyscallNoError(call *ssa.CallCommon) (llvm.Value, error) {

compiler/testdata/basic.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'basic.go'
 source_filename = "basic.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 %main.kv = type { float, i32, i32, i32 }
@@ -206,7 +206,7 @@ entry:
   ret void
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }

compiler/testdata/channel.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'channel.go'
 source_filename = "channel.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 %runtime.channelOp = type { ptr, ptr, i32, ptr }
@@ -82,11 +82,11 @@ entry:
   store i32 1, ptr %select.send.value, align 4
   call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %select.states.alloca)
   store ptr %ch1, ptr %select.states.alloca, align 4
-  %select.states.alloca.repack1 = getelementptr inbounds nuw i8, ptr %select.states.alloca, i32 4
+  %select.states.alloca.repack1 = getelementptr inbounds i8, ptr %select.states.alloca, i32 4
   store ptr %select.send.value, ptr %select.states.alloca.repack1, align 4
-  %0 = getelementptr inbounds nuw i8, ptr %select.states.alloca, i32 8
+  %0 = getelementptr inbounds i8, ptr %select.states.alloca, i32 8
   store ptr %ch2, ptr %0, align 4
-  %.repack3 = getelementptr inbounds nuw i8, ptr %select.states.alloca, i32 12
+  %.repack3 = getelementptr inbounds i8, ptr %select.states.alloca, i32 12
   store ptr null, ptr %.repack3, align 4
   %select.result = call { i32, i1 } @runtime.chanSelect(ptr undef, ptr nonnull %select.states.alloca, i32 2, i32 2, ptr null, i32 0, i32 0, ptr undef) #4
   call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %select.states.alloca)
@@ -107,8 +107,8 @@ select.body:                                      ; preds = %select.next
 
 declare { i32, i1 } @runtime.chanSelect(ptr, ptr, i32, i32, ptr, i32, i32, ptr) #1
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
 attributes #4 = { nounwind }

compiler/testdata/defer-cortex-m-qemu.ll

@@ -27,7 +27,7 @@ entry:
   %0 = call ptr @llvm.stacksave.p0()
   call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
   store i32 0, ptr %defer.alloca, align 4
-  %defer.alloca.repack15 = getelementptr inbounds nuw i8, ptr %defer.alloca, i32 4
+  %defer.alloca.repack15 = getelementptr inbounds i8, ptr %defer.alloca, i32 4
   store ptr null, ptr %defer.alloca.repack15, align 4
   store ptr %defer.alloca, ptr %deferPtr, align 4
   %setjmp = call i32 asm "\0Amovs r0, #0\0Amov r2, pc\0Astr r2, [r1, #4]", "={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}"(ptr nonnull %deferframe.buf) #5
@@ -51,7 +51,7 @@ rundefers.loophead:                               ; preds = %3, %rundefers.block
   br i1 %stackIsNil, label %rundefers.end, label %rundefers.loop
 
 rundefers.loop:                                   ; preds = %rundefers.loophead
-  %stack.next.gep = getelementptr inbounds nuw i8, ptr %2, i32 4
+  %stack.next.gep = getelementptr inbounds i8, ptr %2, i32 4
   %stack.next = load ptr, ptr %stack.next.gep, align 4
   store ptr %stack.next, ptr %deferPtr, align 4
   %callback = load i32, ptr %2, align 4
@@ -87,7 +87,7 @@ rundefers.loophead6:                              ; preds = %5, %lpad
   br i1 %stackIsNil7, label %rundefers.end3, label %rundefers.loop5
 
 rundefers.loop5:                                  ; preds = %rundefers.loophead6
-  %stack.next.gep8 = getelementptr inbounds nuw i8, ptr %4, i32 4
+  %stack.next.gep8 = getelementptr inbounds i8, ptr %4, i32 4
   %stack.next9 = load ptr, ptr %stack.next.gep8, align 4
   store ptr %stack.next9, ptr %deferPtr, align 4
   %callback11 = load i32, ptr %4, align 4
@@ -144,11 +144,11 @@ entry:
   %0 = call ptr @llvm.stacksave.p0()
   call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
   store i32 0, ptr %defer.alloca, align 4
-  %defer.alloca.repack22 = getelementptr inbounds nuw i8, ptr %defer.alloca, i32 4
+  %defer.alloca.repack22 = getelementptr inbounds i8, ptr %defer.alloca, i32 4
   store ptr null, ptr %defer.alloca.repack22, align 4
   store ptr %defer.alloca, ptr %deferPtr, align 4
   store i32 1, ptr %defer.alloca2, align 4
-  %defer.alloca2.repack23 = getelementptr inbounds nuw i8, ptr %defer.alloca2, i32 4
+  %defer.alloca2.repack23 = getelementptr inbounds i8, ptr %defer.alloca2, i32 4
   store ptr %defer.alloca, ptr %defer.alloca2.repack23, align 4
   store ptr %defer.alloca2, ptr %deferPtr, align 4
   %setjmp = call i32 asm "\0Amovs r0, #0\0Amov r2, pc\0Astr r2, [r1, #4]", "={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}"(ptr nonnull %deferframe.buf) #5
@@ -172,7 +172,7 @@ rundefers.loophead:                               ; preds = %4, %3, %rundefers.b
   br i1 %stackIsNil, label %rundefers.end, label %rundefers.loop
 
 rundefers.loop:                                   ; preds = %rundefers.loophead
-  %stack.next.gep = getelementptr inbounds nuw i8, ptr %2, i32 4
+  %stack.next.gep = getelementptr inbounds i8, ptr %2, i32 4
   %stack.next = load ptr, ptr %stack.next.gep, align 4
   store ptr %stack.next, ptr %deferPtr, align 4
   %callback = load i32, ptr %2, align 4
@@ -218,7 +218,7 @@ rundefers.loophead10:                             ; preds = %7, %6, %lpad
   br i1 %stackIsNil11, label %rundefers.end7, label %rundefers.loop9
 
 rundefers.loop9:                                  ; preds = %rundefers.loophead10
-  %stack.next.gep12 = getelementptr inbounds nuw i8, ptr %5, i32 4
+  %stack.next.gep12 = getelementptr inbounds i8, ptr %5, i32 4
   %stack.next13 = load ptr, ptr %stack.next.gep12, align 4
   store ptr %stack.next13, ptr %deferPtr, align 4
   %callback15 = load i32, ptr %5, align 4
@@ -270,241 +270,6 @@ entry:
   ret void
 }
 
-; Function Attrs: nounwind
-define hidden void @main.deferInfiniteLoop(ptr %context) unnamed_addr #1 {
-entry:
-  %deferPtr = alloca ptr, align 4
-  store ptr null, ptr %deferPtr, align 4
-  %deferframe.buf = alloca %runtime.deferFrame, align 4
-  %0 = call ptr @llvm.stacksave.p0()
-  call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
-  br label %for.body
-
-for.body:                                         ; preds = %for.body, %entry
-  %defer.next = load ptr, ptr %deferPtr, align 4
-  %defer.alloc.call = call dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #4
-  store i32 0, ptr %defer.alloc.call, align 4
-  %defer.alloc.call.repack1 = getelementptr inbounds nuw i8, ptr %defer.alloc.call, i32 4
-  store ptr %defer.next, ptr %defer.alloc.call.repack1, align 4
-  %defer.alloc.call.repack3 = getelementptr inbounds nuw i8, ptr %defer.alloc.call, i32 8
-  store i32 8, ptr %defer.alloc.call.repack3, align 4
-  store ptr %defer.alloc.call, ptr %deferPtr, align 4
-  br label %for.body
-
-recover:                                          ; preds = %rundefers.end
-  ret void
-
-lpad:                                             ; No predecessors!
-  br label %rundefers.loophead
-
-rundefers.loophead:                               ; preds = %rundefers.callback0, %lpad
-  br i1 poison, label %rundefers.end, label %rundefers.loop
-
-rundefers.loop:                                   ; preds = %rundefers.loophead
-  switch i32 poison, label %rundefers.default [
-    i32 0, label %rundefers.callback0
-  ]
-
-rundefers.callback0:                              ; preds = %rundefers.loop
-  br label %rundefers.loophead
-
-rundefers.default:                                ; preds = %rundefers.loop
-  unreachable
-
-rundefers.end:                                    ; preds = %rundefers.loophead
-  br label %recover
-}
-
-; Function Attrs: nounwind
-define hidden void @main.deferLoop(ptr %context) unnamed_addr #1 {
-entry:
-  %deferPtr = alloca ptr, align 4
-  store ptr null, ptr %deferPtr, align 4
-  %deferframe.buf = alloca %runtime.deferFrame, align 4
-  %0 = call ptr @llvm.stacksave.p0()
-  call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
-  br label %for.loop
-
-for.loop:                                         ; preds = %for.body, %entry
-  %1 = phi i32 [ 0, %entry ], [ %3, %for.body ]
-  %2 = icmp slt i32 %1, 10
-  br i1 %2, label %for.body, label %for.done
-
-for.body:                                         ; preds = %for.loop
-  %defer.next = load ptr, ptr %deferPtr, align 4
-  %defer.alloc.call = call dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #4
-  store i32 0, ptr %defer.alloc.call, align 4
-  %defer.alloc.call.repack13 = getelementptr inbounds nuw i8, ptr %defer.alloc.call, i32 4
-  store ptr %defer.next, ptr %defer.alloc.call.repack13, align 4
-  %defer.alloc.call.repack15 = getelementptr inbounds nuw i8, ptr %defer.alloc.call, i32 8
-  store i32 %1, ptr %defer.alloc.call.repack15, align 4
-  store ptr %defer.alloc.call, ptr %deferPtr, align 4
-  %3 = add i32 %1, 1
-  br label %for.loop
-
-for.done:                                         ; preds = %for.loop
-  br label %rundefers.block
-
-rundefers.after:                                  ; preds = %rundefers.end
-  call void @runtime.destroyDeferFrame(ptr nonnull %deferframe.buf, ptr undef) #4
-  ret void
-
-rundefers.block:                                  ; preds = %for.done
-  br label %rundefers.loophead
-
-rundefers.loophead:                               ; preds = %rundefers.callback0, %rundefers.block
-  %4 = load ptr, ptr %deferPtr, align 4
-  %stackIsNil = icmp eq ptr %4, null
-  br i1 %stackIsNil, label %rundefers.end, label %rundefers.loop
-
-rundefers.loop:                                   ; preds = %rundefers.loophead
-  %stack.next.gep = getelementptr inbounds nuw i8, ptr %4, i32 4
-  %stack.next = load ptr, ptr %stack.next.gep, align 4
-  store ptr %stack.next, ptr %deferPtr, align 4
-  %callback = load i32, ptr %4, align 4
-  switch i32 %callback, label %rundefers.default [
-    i32 0, label %rundefers.callback0
-  ]
-
-rundefers.callback0:                              ; preds = %rundefers.loop
-  %gep = getelementptr inbounds nuw i8, ptr %4, i32 8
-  %param = load i32, ptr %gep, align 4
-  call void @runtime.printlock(ptr undef) #4
-  call void @runtime.printint32(i32 %param, ptr undef) #4
-  call void @runtime.printunlock(ptr undef) #4
-  br label %rundefers.loophead
-
-rundefers.default:                                ; preds = %rundefers.loop
-  unreachable
-
-rundefers.end:                                    ; preds = %rundefers.loophead
-  br label %rundefers.after
-
-recover:                                          ; preds = %rundefers.end1
-  ret void
-
-lpad:                                             ; No predecessors!
-  br label %rundefers.loophead4
-
-rundefers.loophead4:                              ; preds = %rundefers.callback010, %lpad
-  br i1 poison, label %rundefers.end1, label %rundefers.loop3
-
-rundefers.loop3:                                  ; preds = %rundefers.loophead4
-  switch i32 poison, label %rundefers.default2 [
-    i32 0, label %rundefers.callback010
-  ]
-
-rundefers.callback010:                            ; preds = %rundefers.loop3
-  br label %rundefers.loophead4
-
-rundefers.default2:                               ; preds = %rundefers.loop3
-  unreachable
-
-rundefers.end1:                                   ; preds = %rundefers.loophead4
-  br label %recover
-}
-
-; Function Attrs: nounwind
-define hidden void @main.deferBetweenLoops(ptr %context) unnamed_addr #1 {
-entry:
-  %defer.alloca = alloca { i32, ptr, i32 }, align 4
-  %deferPtr = alloca ptr, align 4
-  store ptr null, ptr %deferPtr, align 4
-  %deferframe.buf = alloca %runtime.deferFrame, align 4
-  %0 = call ptr @llvm.stacksave.p0()
-  call void @runtime.setupDeferFrame(ptr nonnull %deferframe.buf, ptr %0, ptr undef) #4
-  br label %for.loop
-
-for.loop:                                         ; preds = %for.body, %entry
-  %1 = phi i32 [ 0, %entry ], [ %3, %for.body ]
-  %2 = icmp slt i32 %1, 10
-  br i1 %2, label %for.body, label %for.done
-
-for.body:                                         ; preds = %for.loop
-  %3 = add i32 %1, 1
-  br label %for.loop
-
-for.done:                                         ; preds = %for.loop
-  %defer.next = load ptr, ptr %deferPtr, align 4
-  store i32 0, ptr %defer.alloca, align 4
-  %defer.alloca.repack16 = getelementptr inbounds nuw i8, ptr %defer.alloca, i32 4
-  store ptr %defer.next, ptr %defer.alloca.repack16, align 4
-  %defer.alloca.repack18 = getelementptr inbounds nuw i8, ptr %defer.alloca, i32 8
-  store i32 1, ptr %defer.alloca.repack18, align 4
-  store ptr %defer.alloca, ptr %deferPtr, align 4
-  br label %for.loop1
-
-for.loop1:                                        ; preds = %for.body2, %for.done
-  %4 = phi i32 [ 0, %for.done ], [ %6, %for.body2 ]
-  %5 = icmp slt i32 %4, 10
-  br i1 %5, label %for.body2, label %for.done3
-
-for.body2:                                        ; preds = %for.loop1
-  %6 = add i32 %4, 1
-  br label %for.loop1
-
-for.done3:                                        ; preds = %for.loop1
-  br label %rundefers.block
-
-rundefers.after:                                  ; preds = %rundefers.end
-  call void @runtime.destroyDeferFrame(ptr nonnull %deferframe.buf, ptr undef) #4
-  ret void
-
-rundefers.block:                                  ; preds = %for.done3
-  br label %rundefers.loophead
-
-rundefers.loophead:                               ; preds = %rundefers.callback0, %rundefers.block
-  %7 = load ptr, ptr %deferPtr, align 4
-  %stackIsNil = icmp eq ptr %7, null
-  br i1 %stackIsNil, label %rundefers.end, label %rundefers.loop
-
-rundefers.loop:                                   ; preds = %rundefers.loophead
-  %stack.next.gep = getelementptr inbounds nuw i8, ptr %7, i32 4
-  %stack.next = load ptr, ptr %stack.next.gep, align 4
-  store ptr %stack.next, ptr %deferPtr, align 4
-  %callback = load i32, ptr %7, align 4
-  switch i32 %callback, label %rundefers.default [
-    i32 0, label %rundefers.callback0
-  ]
-
-rundefers.callback0:                              ; preds = %rundefers.loop
-  %gep = getelementptr inbounds nuw i8, ptr %7, i32 8
-  %param = load i32, ptr %gep, align 4
-  call void @runtime.printlock(ptr undef) #4
-  call void @runtime.printint32(i32 %param, ptr undef) #4
-  call void @runtime.printunlock(ptr undef) #4
-  br label %rundefers.loophead
-
-rundefers.default:                                ; preds = %rundefers.loop
-  unreachable
-
-rundefers.end:                                    ; preds = %rundefers.loophead
-  br label %rundefers.after
-
-recover:                                          ; preds = %rundefers.end4
-  ret void
-
-lpad:                                             ; No predecessors!
-  br label %rundefers.loophead7
-
-rundefers.loophead7:                              ; preds = %rundefers.callback013, %lpad
-  br i1 poison, label %rundefers.end4, label %rundefers.loop6
-
-rundefers.loop6:                                  ; preds = %rundefers.loophead7
-  switch i32 poison, label %rundefers.default5 [
-    i32 0, label %rundefers.callback013
-  ]
-
-rundefers.callback013:                            ; preds = %rundefers.loop6
-  br label %rundefers.loophead7
-
-rundefers.default5:                               ; preds = %rundefers.loop6
-  unreachable
-
-rundefers.end4:                                   ; preds = %rundefers.loophead7
-  br label %recover
-}
-
 attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" }
 attributes #1 = { nounwind "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" }
 attributes #2 = { "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" }

compiler/testdata/defer.go

@@ -18,23 +18,3 @@ func deferMultiple() {
 	}()
 	external()
 }
-
-func deferInfiniteLoop() {
-	for {
-		defer print(8)
-	}
-}
-
-func deferLoop() {
-	for i := 0; i < 10; i++ {
-		defer print(i)
-	}
-}
-
-func deferBetweenLoops() {
-	for i := 0; i < 10; i++ {
-	}
-	defer print(1)
-	for i := 0; i < 10; i++ {
-	}
-}

compiler/testdata/float.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'float.go'
 source_filename = "float.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -93,6 +93,6 @@ entry:
   ret i8 %0
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }

compiler/testdata/func.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'func.go'
 source_filename = "func.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -44,7 +44,7 @@ entry:
   ret void
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }

compiler/testdata/gc.go

@@ -24,10 +24,6 @@ var (
 		x *byte
 		y [61]uintptr
 	}
-	struct5 *struct {
-		x *byte
-		y [30]uintptr
-	}
 
 	slice1 []byte
 	slice2 []*int
@@ -62,10 +58,6 @@ func newStruct() {
 		x *byte
 		y [61]uintptr
 	})
-	struct5 = new(struct {
-		x *byte
-		y [30]uintptr
-	})
 }
 
 func newFuncValue() *func() {

compiler/testdata/gc.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'gc.go'
 source_filename = "gc.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 %runtime._interface = type { ptr, ptr }
@@ -16,12 +16,11 @@ target triple = "wasm32-unknown-wasi"
 @main.struct2 = hidden global ptr null, align 4
 @main.struct3 = hidden global ptr null, align 4
 @main.struct4 = hidden global ptr null, align 4
-@main.struct5 = hidden global ptr null, align 4
 @main.slice1 = hidden global { ptr, i32, i32 } zeroinitializer, align 4
 @main.slice2 = hidden global { ptr, i32, i32 } zeroinitializer, align 4
 @main.slice3 = hidden global { ptr, i32, i32 } zeroinitializer, align 4
-@"runtime/gc.layout:62-0100000000000020" = linkonce_odr unnamed_addr constant { i32, [8 x i8] } { i32 62, [8 x i8] c"\01\00\00\00\00\00\00 " }
+@"runtime/gc.layout:62-2000000000000001" = linkonce_odr unnamed_addr constant { i32, [8 x i8] } { i32 62, [8 x i8] c"\01\00\00\00\00\00\00 " }
-@"runtime/gc.layout:62-0100000000000000" = linkonce_odr unnamed_addr constant { i32, [8 x i8] } { i32 62, [8 x i8] c"\01\00\00\00\00\00\00\00" }
+@"runtime/gc.layout:62-0001" = linkonce_odr unnamed_addr constant { i32, [8 x i8] } { i32 62, [8 x i8] c"\01\00\00\00\00\00\00\00" }
 @"reflect/types.type:basic:complex128" = linkonce_odr constant { i8, ptr } { i8 80, ptr @"reflect/types.type:pointer:basic:complex128" }, align 4
 @"reflect/types.type:pointer:basic:complex128" = linkonce_odr constant { i8, i16, ptr } { i8 -43, i16 0, ptr @"reflect/types.type:basic:complex128" }, align 4
 
@@ -81,15 +80,12 @@ entry:
   %new1 = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %new1, ptr nonnull %stackalloc, ptr undef) #3
   store ptr %new1, ptr @main.struct2, align 4
-  %new2 = call align 4 dereferenceable(248) ptr @runtime.alloc(i32 248, ptr nonnull @"runtime/gc.layout:62-0100000000000020", ptr undef) #3
+  %new2 = call align 4 dereferenceable(248) ptr @runtime.alloc(i32 248, ptr nonnull @"runtime/gc.layout:62-2000000000000001", ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %new2, ptr nonnull %stackalloc, ptr undef) #3
   store ptr %new2, ptr @main.struct3, align 4
-  %new3 = call align 4 dereferenceable(248) ptr @runtime.alloc(i32 248, ptr nonnull @"runtime/gc.layout:62-0100000000000000", ptr undef) #3
+  %new3 = call align 4 dereferenceable(248) ptr @runtime.alloc(i32 248, ptr nonnull @"runtime/gc.layout:62-0001", ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %new3, ptr nonnull %stackalloc, ptr undef) #3
   store ptr %new3, ptr @main.struct4, align 4
-  %new4 = call align 4 dereferenceable(124) ptr @runtime.alloc(i32 124, ptr nonnull inttoptr (i32 127 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %new4, ptr nonnull %stackalloc, ptr undef) #3
-  store ptr %new4, ptr @main.struct5, align 4
   ret void
 }
 
@@ -109,18 +105,18 @@ entry:
   %makeslice = call align 1 dereferenceable(5) ptr @runtime.alloc(i32 5, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %makeslice, ptr nonnull %stackalloc, ptr undef) #3
   store ptr %makeslice, ptr @main.slice1, align 4
-  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice1, i32 4), align 4
+  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice1, i32 4), align 4
-  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice1, i32 8), align 4
+  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice1, i32 8), align 4
   %makeslice1 = call align 4 dereferenceable(20) ptr @runtime.alloc(i32 20, ptr nonnull inttoptr (i32 67 to ptr), ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %makeslice1, ptr nonnull %stackalloc, ptr undef) #3
   store ptr %makeslice1, ptr @main.slice2, align 4
-  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice2, i32 4), align 4
+  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice2, i32 4), align 4
-  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice2, i32 8), align 4
+  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice2, i32 8), align 4
   %makeslice3 = call align 4 dereferenceable(60) ptr @runtime.alloc(i32 60, ptr nonnull inttoptr (i32 71 to ptr), ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %makeslice3, ptr nonnull %stackalloc, ptr undef) #3
   store ptr %makeslice3, ptr @main.slice3, align 4
-  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice3, i32 4), align 4
+  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice3, i32 4), align 4
-  store i32 5, ptr getelementptr inbounds nuw (i8, ptr @main.slice3, i32 8), align 4
+  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice3, i32 8), align 4
   ret void
 }
 
@@ -131,7 +127,7 @@ entry:
   %0 = call align 8 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #3
   call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #3
   store double %v.r, ptr %0, align 8
-  %.repack1 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %.repack1 = getelementptr inbounds i8, ptr %0, i32 8
   store double %v.i, ptr %.repack1, align 8
   %1 = insertvalue %runtime._interface { ptr @"reflect/types.type:basic:complex128", ptr undef }, ptr %0, 1
   call void @runtime.trackPointer(ptr nonnull @"reflect/types.type:basic:complex128", ptr nonnull %stackalloc, ptr undef) #3
@@ -139,7 +135,7 @@ entry:
   ret %runtime._interface %1
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }

compiler/testdata/go1.20.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'go1.20.go'
 source_filename = "go1.20.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 %runtime._string = type { ptr, i32 }
@@ -50,14 +50,14 @@ unsafe.String.throw:                              ; preds = %entry
 declare void @runtime.unsafeSlicePanic(ptr) #1
 
 ; Function Attrs: nounwind
-define hidden ptr @main.unsafeStringData(ptr readonly %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
+define hidden ptr @main.unsafeStringData(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
 entry:
   %stackalloc = alloca i8, align 1
   call void @runtime.trackPointer(ptr %s.data, ptr nonnull %stackalloc, ptr undef) #3
   ret ptr %s.data
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }

compiler/testdata/go1.21.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'go1.21.go'
 source_filename = "go1.21.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 %runtime._string = type { ptr, i32 }
@@ -22,9 +22,6 @@ entry:
   ret i32 %a
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
-declare i32 @llvm.smin.i32(i32, i32) #3
-
 ; Function Attrs: nounwind
 define hidden i32 @main.min2(i32 %a, i32 %b, ptr %context) unnamed_addr #2 {
 entry:
@@ -56,9 +53,6 @@ entry:
   ret i8 %0
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
-declare i8 @llvm.umin.i8(i8, i8) #3
-
 ; Function Attrs: nounwind
 define hidden i32 @main.minUnsigned(i32 %a, i32 %b, ptr %context) unnamed_addr #2 {
 entry:
@@ -66,31 +60,24 @@ entry:
   ret i32 %0
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
-declare i32 @llvm.umin.i32(i32, i32) #3
-
 ; Function Attrs: nounwind
 define hidden float @main.minFloat32(float %a, float %b, ptr %context) unnamed_addr #2 {
 entry:
-  %0 = call float @llvm.minimum.f32(float %a, float %b)
+  %0 = fcmp olt float %a, %b
-  ret float %0
+  %1 = select i1 %0, float %a, float %b
+  ret float %1
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
-declare float @llvm.minimum.f32(float, float) #3
-
 ; Function Attrs: nounwind
 define hidden double @main.minFloat64(double %a, double %b, ptr %context) unnamed_addr #2 {
 entry:
-  %0 = call double @llvm.minimum.f64(double %a, double %b)
+  %0 = fcmp olt double %a, %b
-  ret double %0
+  %1 = select i1 %0, double %a, double %b
+  ret double %1
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
-declare double @llvm.minimum.f64(double, double) #3
-
 ; Function Attrs: nounwind
-define hidden %runtime._string @main.minString(ptr readonly %a.data, i32 %a.len, ptr readonly %b.data, i32 %b.len, ptr %context) unnamed_addr #2 {
+define hidden %runtime._string @main.minString(ptr %a.data, i32 %a.len, ptr %b.data, i32 %b.len, ptr %context) unnamed_addr #2 {
 entry:
   %0 = insertvalue %runtime._string zeroinitializer, ptr %a.data, 0
   %1 = insertvalue %runtime._string %0, i32 %a.len, 1
@@ -99,12 +86,12 @@ entry:
   %stackalloc = alloca i8, align 1
   %4 = call i1 @runtime.stringLess(ptr %a.data, i32 %a.len, ptr %b.data, i32 %b.len, ptr undef) #5
   %5 = select i1 %4, %runtime._string %1, %runtime._string %3
-  %6 = select i1 %4, ptr %a.data, ptr %b.data
+  %6 = extractvalue %runtime._string %5, 0
   call void @runtime.trackPointer(ptr %6, ptr nonnull %stackalloc, ptr undef) #5
   ret %runtime._string %5
 }
 
-declare i1 @runtime.stringLess(ptr readonly, i32, ptr readonly, i32, ptr) #1
+declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #1
 
 ; Function Attrs: nounwind
 define hidden i32 @main.maxInt(i32 %a, i32 %b, ptr %context) unnamed_addr #2 {
@@ -113,9 +100,6 @@ entry:
   ret i32 %0
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
-declare i32 @llvm.smax.i32(i32, i32) #3
-
 ; Function Attrs: nounwind
 define hidden i32 @main.maxUint(i32 %a, i32 %b, ptr %context) unnamed_addr #2 {
 entry:
@@ -123,21 +107,16 @@ entry:
   ret i32 %0
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
-declare i32 @llvm.umax.i32(i32, i32) #3
-
 ; Function Attrs: nounwind
 define hidden float @main.maxFloat32(float %a, float %b, ptr %context) unnamed_addr #2 {
 entry:
-  %0 = call float @llvm.maximum.f32(float %a, float %b)
+  %0 = fcmp ogt float %a, %b
-  ret float %0
+  %1 = select i1 %0, float %a, float %b
+  ret float %1
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
-declare float @llvm.maximum.f32(float, float) #3
-
 ; Function Attrs: nounwind
-define hidden %runtime._string @main.maxString(ptr readonly %a.data, i32 %a.len, ptr readonly %b.data, i32 %b.len, ptr %context) unnamed_addr #2 {
+define hidden %runtime._string @main.maxString(ptr %a.data, i32 %a.len, ptr %b.data, i32 %b.len, ptr %context) unnamed_addr #2 {
 entry:
   %0 = insertvalue %runtime._string zeroinitializer, ptr %a.data, 0
   %1 = insertvalue %runtime._string %0, i32 %a.len, 1
@@ -146,7 +125,7 @@ entry:
   %stackalloc = alloca i8, align 1
   %4 = call i1 @runtime.stringLess(ptr %b.data, i32 %b.len, ptr %a.data, i32 %a.len, ptr undef) #5
   %5 = select i1 %4, %runtime._string %1, %runtime._string %3
-  %6 = select i1 %4, ptr %a.data, ptr %b.data
+  %6 = extractvalue %runtime._string %5, 0
   call void @runtime.trackPointer(ptr %6, ptr nonnull %stackalloc, ptr undef) #5
   ret %runtime._string %5
 }
@@ -160,7 +139,7 @@ entry:
 }
 
 ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
-declare void @llvm.memset.p0.i32(ptr nocapture writeonly, i8, i32, i1 immarg) #4
+declare void @llvm.memset.p0.i32(ptr nocapture writeonly, i8, i32, i1 immarg) #3
 
 ; Function Attrs: nounwind
 define hidden void @main.clearZeroSizedSlice(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #2 {
@@ -177,9 +156,24 @@ entry:
 
 declare void @runtime.hashmapClear(ptr dereferenceable_or_null(40), ptr) #1
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+declare i32 @llvm.smin.i32(i32, i32) #4
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+
-attributes #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
+; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
-attributes #4 = { nocallback nofree nounwind willreturn memory(argmem: write) }
+declare i8 @llvm.umin.i8(i8, i8) #4
+
+; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
+declare i32 @llvm.umin.i32(i32, i32) #4
+
+; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
+declare i32 @llvm.smax.i32(i32, i32) #4
+
+; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
+declare i32 @llvm.umax.i32(i32, i32) #4
+
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
+attributes #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
 attributes #5 = { nounwind }

compiler/testdata/goroutine-cortex-m-qemu-tasks.ll

@@ -17,8 +17,8 @@ entry:
 ; Function Attrs: nounwind
 define hidden void @main.regularFunctionGoroutine(ptr %context) unnamed_addr #1 {
 entry:
-  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"main.regularFunction$gowrapper" to i32), ptr undef) #11
+  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"main.regularFunction$gowrapper" to i32), ptr undef) #9
-  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.regularFunction$gowrapper" to i32), ptr nonnull inttoptr (i32 5 to ptr), i32 %stacksize, ptr undef) #11
+  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.regularFunction$gowrapper" to i32), ptr nonnull inttoptr (i32 5 to ptr), i32 %stacksize, ptr undef) #9
   ret void
 }
 
@@ -28,7 +28,7 @@ declare void @main.regularFunction(i32, ptr) #2
 define linkonce_odr void @"main.regularFunction$gowrapper"(ptr %0) unnamed_addr #3 {
 entry:
   %unpack.int = ptrtoint ptr %0 to i32
-  call void @main.regularFunction(i32 %unpack.int, ptr undef) #11
+  call void @main.regularFunction(i32 %unpack.int, ptr undef) #9
   ret void
 }
 
@@ -39,8 +39,8 @@ declare void @"internal/task.start"(i32, ptr, i32, ptr) #2
 ; Function Attrs: nounwind
 define hidden void @main.inlineFunctionGoroutine(ptr %context) unnamed_addr #1 {
 entry:
-  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"main.inlineFunctionGoroutine$1$gowrapper" to i32), ptr undef) #11
+  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"main.inlineFunctionGoroutine$1$gowrapper" to i32), ptr undef) #9
-  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.inlineFunctionGoroutine$1$gowrapper" to i32), ptr nonnull inttoptr (i32 5 to ptr), i32 %stacksize, ptr undef) #11
+  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.inlineFunctionGoroutine$1$gowrapper" to i32), ptr nonnull inttoptr (i32 5 to ptr), i32 %stacksize, ptr undef) #9
   ret void
 }
 
@@ -61,18 +61,18 @@ entry:
 ; Function Attrs: nounwind
 define hidden void @main.closureFunctionGoroutine(ptr %context) unnamed_addr #1 {
 entry:
-  %n = call align 4 dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #11
+  %n = call align 4 dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #9
   store i32 3, ptr %n, align 4
-  %0 = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr null, ptr undef) #11
+  %0 = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr null, ptr undef) #9
   store i32 5, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %1 = getelementptr inbounds i8, ptr %0, i32 4
   store ptr %n, ptr %1, align 4
-  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr undef) #11
+  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr undef) #9
-  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #11
+  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #9
   %2 = load i32, ptr %n, align 4
-  call void @runtime.printlock(ptr undef) #11
+  call void @runtime.printlock(ptr undef) #9
-  call void @runtime.printint32(i32 %2, ptr undef) #11
+  call void @runtime.printint32(i32 %2, ptr undef) #9
-  call void @runtime.printunlock(ptr undef) #11
+  call void @runtime.printunlock(ptr undef) #9
   ret void
 }
 
@@ -87,7 +87,7 @@ entry:
 define linkonce_odr void @"main.closureFunctionGoroutine$1$gowrapper"(ptr %0) unnamed_addr #5 {
 entry:
   %1 = load i32, ptr %0, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %2 = getelementptr inbounds i8, ptr %0, i32 4
   %3 = load ptr, ptr %2, align 4
   call void @"main.closureFunctionGoroutine$1"(i32 %1, ptr %3)
   ret void
@@ -102,14 +102,14 @@ declare void @runtime.printunlock(ptr) #2
 ; Function Attrs: nounwind
 define hidden void @main.funcGoroutine(ptr %fn.context, ptr %fn.funcptr, ptr %context) unnamed_addr #1 {
 entry:
-  %0 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #11
+  %0 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #9
   store i32 5, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %1 = getelementptr inbounds i8, ptr %0, i32 4
   store ptr %fn.context, ptr %1, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %2 = getelementptr inbounds i8, ptr %0, i32 8
   store ptr %fn.funcptr, ptr %2, align 4
-  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr undef) #11
+  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr undef) #9
-  call void @"internal/task.start"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #11
+  call void @"internal/task.start"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #9
   ret void
 }
 
@@ -117,11 +117,11 @@ entry:
 define linkonce_odr void @main.funcGoroutine.gowrapper(ptr %0) unnamed_addr #6 {
 entry:
   %1 = load i32, ptr %0, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %2 = getelementptr inbounds i8, ptr %0, i32 4
   %3 = load ptr, ptr %2, align 4
-  %4 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %4 = getelementptr inbounds i8, ptr %0, i32 8
   %5 = load ptr, ptr %4, align 4
-  call void %5(i32 %1, ptr %3) #11
+  call void %5(i32 %1, ptr %3) #9
   ret void
 }
 
@@ -134,21 +134,16 @@ entry:
 ; Function Attrs: nounwind
 define hidden void @main.copyBuiltinGoroutine(ptr %dst.data, i32 %dst.len, i32 %dst.cap, ptr %src.data, i32 %src.len, i32 %src.cap, ptr %context) unnamed_addr #1 {
 entry:
-  %copy.n = call i32 @llvm.umin.i32(i32 %dst.len, i32 %src.len)
+  %copy.n = call i32 @runtime.sliceCopy(ptr %dst.data, ptr %src.data, i32 %dst.len, i32 %src.len, i32 1, ptr undef) #9
-  call void @llvm.memmove.p0.p0.i32(ptr align 1 %dst.data, ptr align 1 %src.data, i32 %copy.n, i1 false)
   ret void
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
+declare i32 @runtime.sliceCopy(ptr nocapture writeonly, ptr nocapture readonly, i32, i32, i32, ptr) #2
-declare i32 @llvm.umin.i32(i32, i32) #7
-
-; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.memmove.p0.p0.i32(ptr nocapture writeonly, ptr nocapture readonly, i32, i1 immarg) #8
 
 ; Function Attrs: nounwind
 define hidden void @main.closeBuiltinGoroutine(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #1 {
 entry:
-  call void @runtime.chanClose(ptr %ch, ptr undef) #11
+  call void @runtime.chanClose(ptr %ch, ptr undef) #9
   ret void
 }
 
@@ -157,32 +152,32 @@ declare void @runtime.chanClose(ptr dereferenceable_or_null(36), ptr) #2
 ; Function Attrs: nounwind
 define hidden void @main.startInterfaceMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #1 {
 entry:
-  %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #11
+  %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
   store ptr %itf.value, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %1 = getelementptr inbounds i8, ptr %0, i32 4
   store ptr @"main$string", ptr %1, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %2 = getelementptr inbounds i8, ptr %0, i32 8
   store i32 4, ptr %2, align 4
-  %3 = getelementptr inbounds nuw i8, ptr %0, i32 12
+  %3 = getelementptr inbounds i8, ptr %0, i32 12
   store ptr %itf.typecode, ptr %3, align 4
-  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr undef) #11
+  %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr undef) #9
-  call void @"internal/task.start"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #11
+  call void @"internal/task.start"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #9
   ret void
 }
 
-declare void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr, ptr, i32, ptr, ptr) #9
+declare void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr, ptr, i32, ptr, ptr) #7
 
 ; Function Attrs: nounwind
-define linkonce_odr void @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper"(ptr %0) unnamed_addr #10 {
+define linkonce_odr void @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper"(ptr %0) unnamed_addr #8 {
 entry:
   %1 = load ptr, ptr %0, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %2 = getelementptr inbounds i8, ptr %0, i32 4
   %3 = load ptr, ptr %2, align 4
-  %4 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %4 = getelementptr inbounds i8, ptr %0, i32 8
   %5 = load i32, ptr %4, align 4
-  %6 = getelementptr inbounds nuw i8, ptr %0, i32 12
+  %6 = getelementptr inbounds i8, ptr %0, i32 12
   %7 = load ptr, ptr %6, align 4
-  call void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr %1, ptr %3, i32 %5, ptr %7, ptr undef) #11
+  call void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr %1, ptr %3, i32 %5, ptr %7, ptr undef) #9
   ret void
 }
 
@@ -193,8 +188,6 @@ attributes #3 = { nounwind "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb
 attributes #4 = { nounwind "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" "tinygo-gowrapper"="main.inlineFunctionGoroutine$1" }
 attributes #5 = { nounwind "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" "tinygo-gowrapper"="main.closureFunctionGoroutine$1" }
 attributes #6 = { nounwind "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" "tinygo-gowrapper" }
-attributes #7 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
+attributes #7 = { "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" "tinygo-invoke"="reflect/methods.Print(string)" "tinygo-methods"="reflect/methods.Print(string)" }
-attributes #8 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
+attributes #8 = { nounwind "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" "tinygo-gowrapper"="interface:{Print:func:{basic:string}{}}.Print$invoke" }
-attributes #9 = { "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" "tinygo-invoke"="reflect/methods.Print(string)" "tinygo-methods"="reflect/methods.Print(string)" }
+attributes #9 = { nounwind }
-attributes #10 = { nounwind "target-features"="+armv7-m,+hwdiv,+soft-float,+thumb-mode,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" "tinygo-gowrapper"="interface:{Print:func:{basic:string}{}}.Print$invoke" }
-attributes #11 = { nounwind }

compiler/testdata/goroutine-wasm-asyncify.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'goroutine.go'
 source_filename = "goroutine.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 @"main$string" = internal unnamed_addr constant [4 x i8] c"test", align 1
@@ -19,7 +19,7 @@ entry:
 ; Function Attrs: nounwind
 define hidden void @main.regularFunctionGoroutine(ptr %context) unnamed_addr #2 {
 entry:
-  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.regularFunction$gowrapper" to i32), ptr nonnull inttoptr (i32 5 to ptr), i32 65536, ptr undef) #11
+  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.regularFunction$gowrapper" to i32), ptr nonnull inttoptr (i32 5 to ptr), i32 65536, ptr undef) #9
   ret void
 }
 
@@ -31,8 +31,8 @@ declare void @runtime.deadlock(ptr) #1
 define linkonce_odr void @"main.regularFunction$gowrapper"(ptr %0) unnamed_addr #3 {
 entry:
   %unpack.int = ptrtoint ptr %0 to i32
-  call void @main.regularFunction(i32 %unpack.int, ptr undef) #11
+  call void @main.regularFunction(i32 %unpack.int, ptr undef) #9
-  call void @runtime.deadlock(ptr undef) #11
+  call void @runtime.deadlock(ptr undef) #9
   unreachable
 }
 
@@ -41,7 +41,7 @@ declare void @"internal/task.start"(i32, ptr, i32, ptr) #1
 ; Function Attrs: nounwind
 define hidden void @main.inlineFunctionGoroutine(ptr %context) unnamed_addr #2 {
 entry:
-  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.inlineFunctionGoroutine$1$gowrapper" to i32), ptr nonnull inttoptr (i32 5 to ptr), i32 65536, ptr undef) #11
+  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.inlineFunctionGoroutine$1$gowrapper" to i32), ptr nonnull inttoptr (i32 5 to ptr), i32 65536, ptr undef) #9
   ret void
 }
 
@@ -56,7 +56,7 @@ define linkonce_odr void @"main.inlineFunctionGoroutine$1$gowrapper"(ptr %0) unn
 entry:
   %unpack.int = ptrtoint ptr %0 to i32
   call void @"main.inlineFunctionGoroutine$1"(i32 %unpack.int, ptr undef)
-  call void @runtime.deadlock(ptr undef) #11
+  call void @runtime.deadlock(ptr undef) #9
   unreachable
 }
 
@@ -64,21 +64,21 @@ entry:
 define hidden void @main.closureFunctionGoroutine(ptr %context) unnamed_addr #2 {
 entry:
   %stackalloc = alloca i8, align 1
-  %n = call align 4 dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #11
+  %n = call align 4 dereferenceable(4) ptr @runtime.alloc(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #9
-  call void @runtime.trackPointer(ptr nonnull %n, ptr nonnull %stackalloc, ptr undef) #11
+  call void @runtime.trackPointer(ptr nonnull %n, ptr nonnull %stackalloc, ptr undef) #9
   store i32 3, ptr %n, align 4
-  call void @runtime.trackPointer(ptr nonnull %n, ptr nonnull %stackalloc, ptr undef) #11
+  call void @runtime.trackPointer(ptr nonnull %n, ptr nonnull %stackalloc, ptr undef) #9
-  call void @runtime.trackPointer(ptr nonnull @"main.closureFunctionGoroutine$1", ptr nonnull %stackalloc, ptr undef) #11
+  call void @runtime.trackPointer(ptr nonnull @"main.closureFunctionGoroutine$1", ptr nonnull %stackalloc, ptr undef) #9
-  %0 = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr null, ptr undef) #11
+  %0 = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr null, ptr undef) #9
-  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #11
+  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
   store i32 5, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %1 = getelementptr inbounds i8, ptr %0, i32 4
   store ptr %n, ptr %1, align 4
-  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr nonnull %0, i32 65536, ptr undef) #11
+  call void @"internal/task.start"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr nonnull %0, i32 65536, ptr undef) #9
   %2 = load i32, ptr %n, align 4
-  call void @runtime.printlock(ptr undef) #11
+  call void @runtime.printlock(ptr undef) #9
-  call void @runtime.printint32(i32 %2, ptr undef) #11
+  call void @runtime.printint32(i32 %2, ptr undef) #9
-  call void @runtime.printunlock(ptr undef) #11
+  call void @runtime.printunlock(ptr undef) #9
   ret void
 }
 
@@ -93,10 +93,10 @@ entry:
 define linkonce_odr void @"main.closureFunctionGoroutine$1$gowrapper"(ptr %0) unnamed_addr #5 {
 entry:
   %1 = load i32, ptr %0, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %2 = getelementptr inbounds i8, ptr %0, i32 4
   %3 = load ptr, ptr %2, align 4
   call void @"main.closureFunctionGoroutine$1"(i32 %1, ptr %3)
-  call void @runtime.deadlock(ptr undef) #11
+  call void @runtime.deadlock(ptr undef) #9
   unreachable
 }
 
@@ -110,14 +110,14 @@ declare void @runtime.printunlock(ptr) #1
 define hidden void @main.funcGoroutine(ptr %fn.context, ptr %fn.funcptr, ptr %context) unnamed_addr #2 {
 entry:
   %stackalloc = alloca i8, align 1
-  %0 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #11
+  %0 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #9
-  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #11
+  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
   store i32 5, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %1 = getelementptr inbounds i8, ptr %0, i32 4
   store ptr %fn.context, ptr %1, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %2 = getelementptr inbounds i8, ptr %0, i32 8
   store ptr %fn.funcptr, ptr %2, align 4
-  call void @"internal/task.start"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr nonnull %0, i32 65536, ptr undef) #11
+  call void @"internal/task.start"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr nonnull %0, i32 65536, ptr undef) #9
   ret void
 }
 
@@ -125,12 +125,12 @@ entry:
 define linkonce_odr void @main.funcGoroutine.gowrapper(ptr %0) unnamed_addr #6 {
 entry:
   %1 = load i32, ptr %0, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %2 = getelementptr inbounds i8, ptr %0, i32 4
   %3 = load ptr, ptr %2, align 4
-  %4 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %4 = getelementptr inbounds i8, ptr %0, i32 8
   %5 = load ptr, ptr %4, align 4
-  call void %5(i32 %1, ptr %3) #11
+  call void %5(i32 %1, ptr %3) #9
-  call void @runtime.deadlock(ptr undef) #11
+  call void @runtime.deadlock(ptr undef) #9
   unreachable
 }
 
@@ -143,21 +143,16 @@ entry:
 ; Function Attrs: nounwind
 define hidden void @main.copyBuiltinGoroutine(ptr %dst.data, i32 %dst.len, i32 %dst.cap, ptr %src.data, i32 %src.len, i32 %src.cap, ptr %context) unnamed_addr #2 {
 entry:
-  %copy.n = call i32 @llvm.umin.i32(i32 %dst.len, i32 %src.len)
+  %copy.n = call i32 @runtime.sliceCopy(ptr %dst.data, ptr %src.data, i32 %dst.len, i32 %src.len, i32 1, ptr undef) #9
-  call void @llvm.memmove.p0.p0.i32(ptr align 1 %dst.data, ptr align 1 %src.data, i32 %copy.n, i1 false)
   ret void
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
+declare i32 @runtime.sliceCopy(ptr nocapture writeonly, ptr nocapture readonly, i32, i32, i32, ptr) #1
-declare i32 @llvm.umin.i32(i32, i32) #7
-
-; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.memmove.p0.p0.i32(ptr nocapture writeonly, ptr nocapture readonly, i32, i1 immarg) #8
 
 ; Function Attrs: nounwind
 define hidden void @main.closeBuiltinGoroutine(ptr dereferenceable_or_null(36) %ch, ptr %context) unnamed_addr #2 {
 entry:
-  call void @runtime.chanClose(ptr %ch, ptr undef) #11
+  call void @runtime.chanClose(ptr %ch, ptr undef) #9
   ret void
 }
 
@@ -167,45 +162,43 @@ declare void @runtime.chanClose(ptr dereferenceable_or_null(36), ptr) #1
 define hidden void @main.startInterfaceMethod(ptr %itf.typecode, ptr %itf.value, ptr %context) unnamed_addr #2 {
 entry:
   %stackalloc = alloca i8, align 1
-  %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #11
+  %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
-  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #11
+  call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
   store ptr %itf.value, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %1 = getelementptr inbounds i8, ptr %0, i32 4
   store ptr @"main$string", ptr %1, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %2 = getelementptr inbounds i8, ptr %0, i32 8
   store i32 4, ptr %2, align 4
-  %3 = getelementptr inbounds nuw i8, ptr %0, i32 12
+  %3 = getelementptr inbounds i8, ptr %0, i32 12
   store ptr %itf.typecode, ptr %3, align 4
-  call void @"internal/task.start"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr nonnull %0, i32 65536, ptr undef) #11
+  call void @"internal/task.start"(i32 ptrtoint (ptr @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper" to i32), ptr nonnull %0, i32 65536, ptr undef) #9
   ret void
 }
 
-declare void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr, ptr, i32, ptr, ptr) #9
+declare void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr, ptr, i32, ptr, ptr) #7
 
 ; Function Attrs: nounwind
-define linkonce_odr void @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper"(ptr %0) unnamed_addr #10 {
+define linkonce_odr void @"interface:{Print:func:{basic:string}{}}.Print$invoke$gowrapper"(ptr %0) unnamed_addr #8 {
 entry:
   %1 = load ptr, ptr %0, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %2 = getelementptr inbounds i8, ptr %0, i32 4
   %3 = load ptr, ptr %2, align 4
-  %4 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %4 = getelementptr inbounds i8, ptr %0, i32 8
   %5 = load i32, ptr %4, align 4
-  %6 = getelementptr inbounds nuw i8, ptr %0, i32 12
+  %6 = getelementptr inbounds i8, ptr %0, i32 12
   %7 = load ptr, ptr %6, align 4
-  call void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr %1, ptr %3, i32 %5, ptr %7, ptr undef) #11
+  call void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr %1, ptr %3, i32 %5, ptr %7, ptr undef) #9
-  call void @runtime.deadlock(ptr undef) #11
+  call void @runtime.deadlock(ptr undef) #9
   unreachable
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #3 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.regularFunction" }
+attributes #3 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.regularFunction" }
-attributes #4 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.inlineFunctionGoroutine$1" }
+attributes #4 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.inlineFunctionGoroutine$1" }
-attributes #5 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.closureFunctionGoroutine$1" }
+attributes #5 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.closureFunctionGoroutine$1" }
-attributes #6 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper" }
+attributes #6 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper" }
-attributes #7 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
+attributes #7 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="reflect/methods.Print(string)" "tinygo-methods"="reflect/methods.Print(string)" }
-attributes #8 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
+attributes #8 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="interface:{Print:func:{basic:string}{}}.Print$invoke" }
-attributes #9 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="reflect/methods.Print(string)" "tinygo-methods"="reflect/methods.Print(string)" }
+attributes #9 = { nounwind }
-attributes #10 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="interface:{Print:func:{basic:string}{}}.Print$invoke" }
-attributes #11 = { nounwind }

compiler/testdata/interface.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'interface.go'
 source_filename = "interface.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 %runtime._interface = type { ptr, ptr }
@@ -9,14 +9,12 @@ target triple = "wasm32-unknown-wasi"
 @"reflect/types.type:basic:int" = linkonce_odr constant { i8, ptr } { i8 -62, ptr @"reflect/types.type:pointer:basic:int" }, align 4
 @"reflect/types.type:pointer:basic:int" = linkonce_odr constant { i8, i16, ptr } { i8 -43, i16 0, ptr @"reflect/types.type:basic:int" }, align 4
 @"reflect/types.type:pointer:named:error" = linkonce_odr constant { i8, i16, ptr } { i8 -43, i16 0, ptr @"reflect/types.type:named:error" }, align 4
-@"reflect/types.signature:Error:func:{}{basic:string}" = linkonce_odr constant i8 0, align 1
+@"reflect/types.type:named:error" = linkonce_odr constant { i8, i16, ptr, ptr, ptr, [7 x i8] } { i8 116, i16 1, ptr @"reflect/types.type:pointer:named:error", ptr @"reflect/types.type:interface:{Error:func:{}{basic:string}}", ptr @"reflect/types.type.pkgpath.empty", [7 x i8] c".error\00" }, align 4
-@"reflect/types.type:named:error" = linkonce_odr constant { i8, i16, ptr, ptr, ptr, { i32, [1 x ptr] }, [7 x i8] } { i8 116, i16 -32767, ptr @"reflect/types.type:pointer:named:error", ptr @"reflect/types.type:interface:{Error:func:{}{basic:string}}", ptr @"reflect/types.type.pkgpath.empty", { i32, [1 x ptr] } { i32 1, [1 x ptr] [ptr @"reflect/types.signature:Error:func:{}{basic:string}"] }, [7 x i8] c".error\00" }, align 4
 @"reflect/types.type.pkgpath.empty" = linkonce_odr unnamed_addr constant [1 x i8] zeroinitializer, align 1
-@"reflect/types.type:interface:{Error:func:{}{basic:string}}" = linkonce_odr constant { i8, ptr, { i32, [1 x ptr] } } { i8 84, ptr @"reflect/types.type:pointer:interface:{Error:func:{}{basic:string}}", { i32, [1 x ptr] } { i32 1, [1 x ptr] [ptr @"reflect/types.signature:Error:func:{}{basic:string}"] } }, align 4
+@"reflect/types.type:interface:{Error:func:{}{basic:string}}" = linkonce_odr constant { i8, ptr } { i8 84, ptr @"reflect/types.type:pointer:interface:{Error:func:{}{basic:string}}" }, align 4
 @"reflect/types.type:pointer:interface:{Error:func:{}{basic:string}}" = linkonce_odr constant { i8, i16, ptr } { i8 -43, i16 0, ptr @"reflect/types.type:interface:{Error:func:{}{basic:string}}" }, align 4
 @"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}" = linkonce_odr constant { i8, i16, ptr } { i8 -43, i16 0, ptr @"reflect/types.type:interface:{String:func:{}{basic:string}}" }, align 4
-@"reflect/types.signature:String:func:{}{basic:string}" = linkonce_odr constant i8 0, align 1
+@"reflect/types.type:interface:{String:func:{}{basic:string}}" = linkonce_odr constant { i8, ptr } { i8 84, ptr @"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}" }, align 4
-@"reflect/types.type:interface:{String:func:{}{basic:string}}" = linkonce_odr constant { i8, ptr, { i32, [1 x ptr] } } { i8 84, ptr @"reflect/types.type:pointer:interface:{String:func:{}{basic:string}}", { i32, [1 x ptr] } { i32 1, [1 x ptr] [ptr @"reflect/types.signature:String:func:{}{basic:string}"] } }, align 4
 @"reflect/types.typeid:basic:int" = external constant i8
 
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -132,11 +130,11 @@ entry:
 
 declare %runtime._string @"interface:{Error:func:{}{basic:string}}.Error$invoke"(ptr, ptr, ptr) #6
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #3 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-methods"="reflect/methods.Error() string" }
+attributes #3 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-methods"="reflect/methods.Error() string" }
-attributes #4 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-methods"="reflect/methods.String() string" }
+attributes #4 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-methods"="reflect/methods.String() string" }
-attributes #5 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="main.$methods.foo(int) uint8" "tinygo-methods"="reflect/methods.String() string; main.$methods.foo(int) uint8" }
+attributes #5 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="main.$methods.foo(int) uint8" "tinygo-methods"="reflect/methods.String() string; main.$methods.foo(int) uint8" }
-attributes #6 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="reflect/methods.Error() string" "tinygo-methods"="reflect/methods.Error() string" }
+attributes #6 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="reflect/methods.Error() string" "tinygo-methods"="reflect/methods.Error() string" }
 attributes #7 = { nounwind }

compiler/testdata/pointer.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'pointer.go'
 source_filename = "pointer.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -44,7 +44,7 @@ entry:
   ret ptr %x
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }

compiler/testdata/pragma.go

@@ -2,6 +2,12 @@ package main
 
 import _ "unsafe"
 
+// Use the go:linkname mechanism to link this global to a different package.
+// This is used in math/bits.
+//
+//go:linkname linknamedGlobal runtime.testLinknamedGlobal
+var linknamedGlobal int
+
 // Creates an external global with name extern_global.
 //
 //go:extern extern_global

compiler/testdata/pragma.ll

@@ -1,8 +1,9 @@
 ; ModuleID = 'pragma.go'
 source_filename = "pragma.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
+@runtime.testLinknamedGlobal = external global i32, align 4
 @extern_global = external global [0 x i8], align 1
 @main.alignedGlobal = hidden global [4 x i32] zeroinitializer, align 32
 @main.alignedGlobal16 = hidden global [4 x i32] zeroinitializer, align 16
@@ -93,13 +94,13 @@ entry:
   ret void
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #3 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="extern_func" }
+attributes #3 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="extern_func" }
-attributes #4 = { inlinehint nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #4 = { inlinehint nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #5 = { noinline nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #5 = { noinline nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #6 = { noinline nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="exportedFunctionInSection" }
+attributes #6 = { noinline nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="exportedFunctionInSection" }
-attributes #7 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="modulename" "wasm-import-name"="import1" }
+attributes #7 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="modulename" "wasm-import-name"="import1" }
-attributes #8 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="foobar" "wasm-import-name"="imported" }
+attributes #8 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="foobar" "wasm-import-name"="imported" }
-attributes #9 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="exported" }
+attributes #9 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="exported" }

compiler/testdata/slice.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'slice.go'
 source_filename = "slice.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 ; Function Attrs: allockind("alloc,zeroed") allocsize(0)
@@ -38,7 +38,7 @@ lookup.next:                                      ; preds = %entry
   ret i32 %1
 
 lookup.throw:                                     ; preds = %entry
-  call void @runtime.lookupPanic(ptr undef) #5
+  call void @runtime.lookupPanic(ptr undef) #3
   unreachable
 }
 
@@ -48,55 +48,49 @@ declare void @runtime.lookupPanic(ptr) #1
 define hidden { ptr, i32, i32 } @main.sliceAppendValues(ptr %ints.data, i32 %ints.len, i32 %ints.cap, ptr %context) unnamed_addr #2 {
 entry:
   %stackalloc = alloca i8, align 1
-  %varargs = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #5
+  %varargs = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %varargs, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr nonnull %varargs, ptr nonnull %stackalloc, ptr undef) #3
   store i32 1, ptr %varargs, align 4
-  %0 = getelementptr inbounds nuw i8, ptr %varargs, i32 4
+  %0 = getelementptr inbounds i8, ptr %varargs, i32 4
   store i32 2, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %varargs, i32 8
+  %1 = getelementptr inbounds i8, ptr %varargs, i32 8
   store i32 3, ptr %1, align 4
-  %append.new = call { ptr, i32, i32 } @runtime.sliceAppend(ptr %ints.data, ptr nonnull %varargs, i32 %ints.len, i32 %ints.cap, i32 3, i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #5
+  %append.new = call { ptr, i32, i32 } @runtime.sliceAppend(ptr %ints.data, ptr nonnull %varargs, i32 %ints.len, i32 %ints.cap, i32 3, i32 4, ptr undef) #3
   %append.newPtr = extractvalue { ptr, i32, i32 } %append.new, 0
   %append.newLen = extractvalue { ptr, i32, i32 } %append.new, 1
   %append.newCap = extractvalue { ptr, i32, i32 } %append.new, 2
   %2 = insertvalue { ptr, i32, i32 } undef, ptr %append.newPtr, 0
   %3 = insertvalue { ptr, i32, i32 } %2, i32 %append.newLen, 1
   %4 = insertvalue { ptr, i32, i32 } %3, i32 %append.newCap, 2
-  call void @runtime.trackPointer(ptr %append.newPtr, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr %append.newPtr, ptr nonnull %stackalloc, ptr undef) #3
   ret { ptr, i32, i32 } %4
 }
 
-declare { ptr, i32, i32 } @runtime.sliceAppend(ptr, ptr nocapture readonly, i32, i32, i32, i32, ptr, ptr) #1
+declare { ptr, i32, i32 } @runtime.sliceAppend(ptr, ptr nocapture readonly, i32, i32, i32, i32, ptr) #1
 
 ; Function Attrs: nounwind
 define hidden { ptr, i32, i32 } @main.sliceAppendSlice(ptr %ints.data, i32 %ints.len, i32 %ints.cap, ptr %added.data, i32 %added.len, i32 %added.cap, ptr %context) unnamed_addr #2 {
 entry:
   %stackalloc = alloca i8, align 1
-  %append.new = call { ptr, i32, i32 } @runtime.sliceAppend(ptr %ints.data, ptr %added.data, i32 %ints.len, i32 %ints.cap, i32 %added.len, i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #5
+  %append.new = call { ptr, i32, i32 } @runtime.sliceAppend(ptr %ints.data, ptr %added.data, i32 %ints.len, i32 %ints.cap, i32 %added.len, i32 4, ptr undef) #3
   %append.newPtr = extractvalue { ptr, i32, i32 } %append.new, 0
   %append.newLen = extractvalue { ptr, i32, i32 } %append.new, 1
   %append.newCap = extractvalue { ptr, i32, i32 } %append.new, 2
   %0 = insertvalue { ptr, i32, i32 } undef, ptr %append.newPtr, 0
   %1 = insertvalue { ptr, i32, i32 } %0, i32 %append.newLen, 1
   %2 = insertvalue { ptr, i32, i32 } %1, i32 %append.newCap, 2
-  call void @runtime.trackPointer(ptr %append.newPtr, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr %append.newPtr, ptr nonnull %stackalloc, ptr undef) #3
   ret { ptr, i32, i32 } %2
 }
 
 ; Function Attrs: nounwind
 define hidden i32 @main.sliceCopy(ptr %dst.data, i32 %dst.len, i32 %dst.cap, ptr %src.data, i32 %src.len, i32 %src.cap, ptr %context) unnamed_addr #2 {
 entry:
-  %copy.n = call i32 @llvm.umin.i32(i32 %dst.len, i32 %src.len)
+  %copy.n = call i32 @runtime.sliceCopy(ptr %dst.data, ptr %src.data, i32 %dst.len, i32 %src.len, i32 4, ptr undef) #3
-  %copy.size = shl nuw i32 %copy.n, 2
-  call void @llvm.memmove.p0.p0.i32(ptr align 4 %dst.data, ptr align 4 %src.data, i32 %copy.size, i1 false)
   ret i32 %copy.n
 }
 
-; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
+declare i32 @runtime.sliceCopy(ptr nocapture writeonly, ptr nocapture readonly, i32, i32, i32, ptr) #1
-declare i32 @llvm.umin.i32(i32, i32) #3
-
-; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
-declare void @llvm.memmove.p0.p0.i32(ptr nocapture writeonly, ptr nocapture readonly, i32, i1 immarg) #4
 
 ; Function Attrs: nounwind
 define hidden { ptr, i32, i32 } @main.makeByteSlice(i32 %len, ptr %context) unnamed_addr #2 {
@@ -106,15 +100,15 @@ entry:
   br i1 %slice.maxcap, label %slice.throw, label %slice.next
 
 slice.next:                                       ; preds = %entry
-  %makeslice.buf = call align 1 ptr @runtime.alloc(i32 %len, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #5
+  %makeslice.buf = call align 1 ptr @runtime.alloc(i32 %len, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   %0 = insertvalue { ptr, i32, i32 } undef, ptr %makeslice.buf, 0
   %1 = insertvalue { ptr, i32, i32 } %0, i32 %len, 1
   %2 = insertvalue { ptr, i32, i32 } %1, i32 %len, 2
-  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #3
   ret { ptr, i32, i32 } %2
 
 slice.throw:                                      ; preds = %entry
-  call void @runtime.slicePanic(ptr undef) #5
+  call void @runtime.slicePanic(ptr undef) #3
   unreachable
 }
 
@@ -129,15 +123,15 @@ entry:
 
 slice.next:                                       ; preds = %entry
   %makeslice.cap = shl nuw i32 %len, 1
-  %makeslice.buf = call align 2 ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #5
+  %makeslice.buf = call align 2 ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   %0 = insertvalue { ptr, i32, i32 } undef, ptr %makeslice.buf, 0
   %1 = insertvalue { ptr, i32, i32 } %0, i32 %len, 1
   %2 = insertvalue { ptr, i32, i32 } %1, i32 %len, 2
-  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #3
   ret { ptr, i32, i32 } %2
 
 slice.throw:                                      ; preds = %entry
-  call void @runtime.slicePanic(ptr undef) #5
+  call void @runtime.slicePanic(ptr undef) #3
   unreachable
 }
 
@@ -150,15 +144,15 @@ entry:
 
 slice.next:                                       ; preds = %entry
   %makeslice.cap = mul i32 %len, 3
-  %makeslice.buf = call align 1 ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #5
+  %makeslice.buf = call align 1 ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   %0 = insertvalue { ptr, i32, i32 } undef, ptr %makeslice.buf, 0
   %1 = insertvalue { ptr, i32, i32 } %0, i32 %len, 1
   %2 = insertvalue { ptr, i32, i32 } %1, i32 %len, 2
-  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #3
   ret { ptr, i32, i32 } %2
 
 slice.throw:                                      ; preds = %entry
-  call void @runtime.slicePanic(ptr undef) #5
+  call void @runtime.slicePanic(ptr undef) #3
   unreachable
 }
 
@@ -171,15 +165,15 @@ entry:
 
 slice.next:                                       ; preds = %entry
   %makeslice.cap = shl nuw i32 %len, 2
-  %makeslice.buf = call align 4 ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #5
+  %makeslice.buf = call align 4 ptr @runtime.alloc(i32 %makeslice.cap, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
   %0 = insertvalue { ptr, i32, i32 } undef, ptr %makeslice.buf, 0
   %1 = insertvalue { ptr, i32, i32 } %0, i32 %len, 1
   %2 = insertvalue { ptr, i32, i32 } %1, i32 %len, 2
-  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr nonnull %makeslice.buf, ptr nonnull %stackalloc, ptr undef) #3
   ret { ptr, i32, i32 } %2
 
 slice.throw:                                      ; preds = %entry
-  call void @runtime.slicePanic(ptr undef) #5
+  call void @runtime.slicePanic(ptr undef) #3
   unreachable
 }
 
@@ -188,7 +182,7 @@ define hidden ptr @main.Add32(ptr %p, i32 %len, ptr %context) unnamed_addr #2 {
 entry:
   %stackalloc = alloca i8, align 1
   %0 = getelementptr i8, ptr %p, i32 %len
-  call void @runtime.trackPointer(ptr %0, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr %0, ptr nonnull %stackalloc, ptr undef) #3
   ret ptr %0
 }
 
@@ -198,7 +192,7 @@ entry:
   %stackalloc = alloca i8, align 1
   %0 = trunc i64 %len to i32
   %1 = getelementptr i8, ptr %p, i32 %0
-  call void @runtime.trackPointer(ptr %1, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr %1, ptr nonnull %stackalloc, ptr undef) #3
   ret ptr %1
 }
 
@@ -212,7 +206,7 @@ slicetoarray.next:                                ; preds = %entry
   ret ptr %s.data
 
 slicetoarray.throw:                               ; preds = %entry
-  call void @runtime.sliceToArrayPointerPanic(ptr undef) #5
+  call void @runtime.sliceToArrayPointerPanic(ptr undef) #3
   unreachable
 }
 
@@ -222,8 +216,8 @@ declare void @runtime.sliceToArrayPointerPanic(ptr) #1
 define hidden ptr @main.SliceToArrayConst(ptr %context) unnamed_addr #2 {
 entry:
   %stackalloc = alloca i8, align 1
-  %makeslice = call align 4 dereferenceable(24) ptr @runtime.alloc(i32 24, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #5
+  %makeslice = call align 4 dereferenceable(24) ptr @runtime.alloc(i32 24, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
-  call void @runtime.trackPointer(ptr nonnull %makeslice, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr nonnull %makeslice, ptr nonnull %stackalloc, ptr undef) #3
   br i1 false, label %slicetoarray.throw, label %slicetoarray.next
 
 slicetoarray.next:                                ; preds = %entry
@@ -248,11 +242,11 @@ unsafe.Slice.next:                                ; preds = %entry
   %5 = insertvalue { ptr, i32, i32 } undef, ptr %ptr, 0
   %6 = insertvalue { ptr, i32, i32 } %5, i32 %len, 1
   %7 = insertvalue { ptr, i32, i32 } %6, i32 %len, 2
-  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #3
   ret { ptr, i32, i32 } %7
 
 unsafe.Slice.throw:                               ; preds = %entry
-  call void @runtime.unsafeSlicePanic(ptr undef) #5
+  call void @runtime.unsafeSlicePanic(ptr undef) #3
   unreachable
 }
 
@@ -272,11 +266,11 @@ unsafe.Slice.next:                                ; preds = %entry
   %4 = insertvalue { ptr, i32, i32 } undef, ptr %ptr, 0
   %5 = insertvalue { ptr, i32, i32 } %4, i32 %3, 1
   %6 = insertvalue { ptr, i32, i32 } %5, i32 %3, 2
-  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #3
   ret { ptr, i32, i32 } %6
 
 unsafe.Slice.throw:                               ; preds = %entry
-  call void @runtime.unsafeSlicePanic(ptr undef) #5
+  call void @runtime.unsafeSlicePanic(ptr undef) #3
   unreachable
 }
 
@@ -296,11 +290,11 @@ unsafe.Slice.next:                                ; preds = %entry
   %6 = insertvalue { ptr, i32, i32 } undef, ptr %ptr, 0
   %7 = insertvalue { ptr, i32, i32 } %6, i32 %5, 1
   %8 = insertvalue { ptr, i32, i32 } %7, i32 %5, 2
-  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #3
   ret { ptr, i32, i32 } %8
 
 unsafe.Slice.throw:                               ; preds = %entry
-  call void @runtime.unsafeSlicePanic(ptr undef) #5
+  call void @runtime.unsafeSlicePanic(ptr undef) #3
   unreachable
 }
 
@@ -320,17 +314,15 @@ unsafe.Slice.next:                                ; preds = %entry
   %6 = insertvalue { ptr, i32, i32 } undef, ptr %ptr, 0
   %7 = insertvalue { ptr, i32, i32 } %6, i32 %5, 1
   %8 = insertvalue { ptr, i32, i32 } %7, i32 %5, 2
-  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #5
+  call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #3
   ret { ptr, i32, i32 } %8
 
 unsafe.Slice.throw:                               ; preds = %entry
-  call void @runtime.unsafeSlicePanic(ptr undef) #5
+  call void @runtime.unsafeSlicePanic(ptr undef) #3
   unreachable
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
+attributes #3 = { nounwind }
-attributes #4 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
-attributes #5 = { nounwind }

compiler/testdata/string.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'string.go'
 source_filename = "string.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 %runtime._string = type { ptr, i32 }
@@ -31,13 +31,13 @@ entry:
 }
 
 ; Function Attrs: nounwind
-define hidden i32 @main.stringLen(ptr readonly %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
+define hidden i32 @main.stringLen(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
 entry:
   ret i32 %s.len
 }
 
 ; Function Attrs: nounwind
-define hidden i8 @main.stringIndex(ptr readonly %s.data, i32 %s.len, i32 %index, ptr %context) unnamed_addr #2 {
+define hidden i8 @main.stringIndex(ptr %s.data, i32 %s.len, i32 %index, ptr %context) unnamed_addr #2 {
 entry:
   %.not = icmp ult i32 %index, %s.len
   br i1 %.not, label %lookup.next, label %lookup.throw
@@ -55,16 +55,16 @@ lookup.throw:                                     ; preds = %entry
 declare void @runtime.lookupPanic(ptr) #1
 
 ; Function Attrs: nounwind
-define hidden i1 @main.stringCompareEqual(ptr readonly %s1.data, i32 %s1.len, ptr readonly %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.stringCompareEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
 entry:
   %0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #3
   ret i1 %0
 }
 
-declare i1 @runtime.stringEqual(ptr readonly, i32, ptr readonly, i32, ptr) #1
+declare i1 @runtime.stringEqual(ptr, i32, ptr, i32, ptr) #1
 
 ; Function Attrs: nounwind
-define hidden i1 @main.stringCompareUnequal(ptr readonly %s1.data, i32 %s1.len, ptr readonly %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.stringCompareUnequal(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
 entry:
   %0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #3
   %1 = xor i1 %0, true
@@ -72,23 +72,23 @@ entry:
 }
 
 ; Function Attrs: nounwind
-define hidden i1 @main.stringCompareLarger(ptr readonly %s1.data, i32 %s1.len, ptr readonly %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
+define hidden i1 @main.stringCompareLarger(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
 entry:
   %0 = call i1 @runtime.stringLess(ptr %s2.data, i32 %s2.len, ptr %s1.data, i32 %s1.len, ptr undef) #3
   ret i1 %0
 }
 
-declare i1 @runtime.stringLess(ptr readonly, i32, ptr readonly, i32, ptr) #1
+declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #1
 
 ; Function Attrs: nounwind
-define hidden i8 @main.stringLookup(ptr readonly %s.data, i32 %s.len, i8 %x, ptr %context) unnamed_addr #2 {
+define hidden i8 @main.stringLookup(ptr %s.data, i32 %s.len, i8 %x, ptr %context) unnamed_addr #2 {
 entry:
   %0 = zext i8 %x to i32
-  %.not = icmp ugt i32 %s.len, %0
+  %.not = icmp ult i32 %0, %s.len
   br i1 %.not, label %lookup.next, label %lookup.throw
 
 lookup.next:                                      ; preds = %entry
-  %1 = getelementptr inbounds nuw i8, ptr %s.data, i32 %0
+  %1 = getelementptr inbounds i8, ptr %s.data, i32 %0
   %2 = load i8, ptr %1, align 1
   ret i8 %2
 
@@ -97,7 +97,7 @@ lookup.throw:                                     ; preds = %entry
   unreachable
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #3 = { nounwind }

compiler/testdata/zeromap.ll

@@ -1,6 +1,6 @@
 ; ModuleID = 'zeromap.go'
 source_filename = "zeromap.go"
-target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
+target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
 target triple = "wasm32-unknown-wasi"
 
 %main.hasPadding = type { i1, i32, i1 }
@@ -27,9 +27,9 @@ entry:
   call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %hashmap.value)
   call void @llvm.lifetime.start.p0(i64 12, ptr nonnull %hashmap.key)
   store %main.hasPadding %2, ptr %hashmap.key, align 4
-  %3 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 1
+  %3 = getelementptr inbounds i8, ptr %hashmap.key, i32 1
   call void @runtime.memzero(ptr nonnull %3, i32 3, ptr undef) #5
-  %4 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 9
+  %4 = getelementptr inbounds i8, ptr %hashmap.key, i32 9
   call void @runtime.memzero(ptr nonnull %4, i32 3, ptr undef) #5
   %5 = call i1 @runtime.hashmapBinaryGet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, i32 4, ptr undef) #5
   call void @llvm.lifetime.end.p0(i64 12, ptr nonnull %hashmap.key)
@@ -60,9 +60,9 @@ entry:
   store i32 5, ptr %hashmap.value, align 4
   call void @llvm.lifetime.start.p0(i64 12, ptr nonnull %hashmap.key)
   store %main.hasPadding %2, ptr %hashmap.key, align 4
-  %3 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 1
+  %3 = getelementptr inbounds i8, ptr %hashmap.key, i32 1
   call void @runtime.memzero(ptr nonnull %3, i32 3, ptr undef) #5
-  %4 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 9
+  %4 = getelementptr inbounds i8, ptr %hashmap.key, i32 9
   call void @runtime.memzero(ptr nonnull %4, i32 3, ptr undef) #5
   call void @runtime.hashmapBinarySet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, ptr undef) #5
   call void @llvm.lifetime.end.p0(i64 12, ptr nonnull %hashmap.key)
@@ -81,16 +81,16 @@ entry:
   call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %hashmap.key)
   %s.elt = extractvalue [2 x %main.hasPadding] %s, 0
   store %main.hasPadding %s.elt, ptr %hashmap.key, align 4
-  %hashmap.key.repack1 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 12
+  %hashmap.key.repack1 = getelementptr inbounds i8, ptr %hashmap.key, i32 12
   %s.elt2 = extractvalue [2 x %main.hasPadding] %s, 1
   store %main.hasPadding %s.elt2, ptr %hashmap.key.repack1, align 4
-  %0 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 1
+  %0 = getelementptr inbounds i8, ptr %hashmap.key, i32 1
   call void @runtime.memzero(ptr nonnull %0, i32 3, ptr undef) #5
-  %1 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 9
+  %1 = getelementptr inbounds i8, ptr %hashmap.key, i32 9
   call void @runtime.memzero(ptr nonnull %1, i32 3, ptr undef) #5
-  %2 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 13
+  %2 = getelementptr inbounds i8, ptr %hashmap.key, i32 13
   call void @runtime.memzero(ptr nonnull %2, i32 3, ptr undef) #5
-  %3 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 21
+  %3 = getelementptr inbounds i8, ptr %hashmap.key, i32 21
   call void @runtime.memzero(ptr nonnull %3, i32 3, ptr undef) #5
   %4 = call i1 @runtime.hashmapBinaryGet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, i32 4, ptr undef) #5
   call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %hashmap.key)
@@ -109,16 +109,16 @@ entry:
   call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %hashmap.key)
   %s.elt = extractvalue [2 x %main.hasPadding] %s, 0
   store %main.hasPadding %s.elt, ptr %hashmap.key, align 4
-  %hashmap.key.repack1 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 12
+  %hashmap.key.repack1 = getelementptr inbounds i8, ptr %hashmap.key, i32 12
   %s.elt2 = extractvalue [2 x %main.hasPadding] %s, 1
   store %main.hasPadding %s.elt2, ptr %hashmap.key.repack1, align 4
-  %0 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 1
+  %0 = getelementptr inbounds i8, ptr %hashmap.key, i32 1
   call void @runtime.memzero(ptr nonnull %0, i32 3, ptr undef) #5
-  %1 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 9
+  %1 = getelementptr inbounds i8, ptr %hashmap.key, i32 9
   call void @runtime.memzero(ptr nonnull %1, i32 3, ptr undef) #5
-  %2 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 13
+  %2 = getelementptr inbounds i8, ptr %hashmap.key, i32 13
   call void @runtime.memzero(ptr nonnull %2, i32 3, ptr undef) #5
-  %3 = getelementptr inbounds nuw i8, ptr %hashmap.key, i32 21
+  %3 = getelementptr inbounds i8, ptr %hashmap.key, i32 21
   call void @runtime.memzero(ptr nonnull %3, i32 3, ptr undef) #5
   call void @runtime.hashmapBinarySet(ptr %m, ptr nonnull %hashmap.key, ptr nonnull %hashmap.value, ptr undef) #5
   call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %hashmap.key)
@@ -132,9 +132,9 @@ entry:
   ret void
 }
 
-attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #1 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #2 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
-attributes #3 = { noinline nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
+attributes #3 = { noinline nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
 attributes #4 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
 attributes #5 = { nounwind }

diagnostics/diagnostics.go

@@ -10,7 +10,6 @@ import (
 	"go/types"
 	"io"
 	"path/filepath"
-	"reflect"
 	"sort"
 	"strings"
 
@@ -24,11 +23,6 @@ import (
 type Diagnostic struct {
 	Pos token.Position
 	Msg string
-
-	// Start and end position, if available. For many errors these positions are
-	// not available, but for some they are.
-	StartPos token.Position
-	EndPos   token.Position
 }
 
 // One or multiple errors of a particular package.
@@ -120,22 +114,12 @@ func createPackageDiagnostic(err error) PackageDiagnostic {
 func createDiagnostics(err error) []Diagnostic {
 	switch err := err.(type) {
 	case types.Error:
-		diag := Diagnostic{
+		return []Diagnostic{
-			Pos: err.Fset.Position(err.Pos),
+			{
-			Msg: err.Msg,
+				Pos: err.Fset.Position(err.Pos),
+				Msg: err.Msg,
+			},
 		}
-		// There is a special unexported API since Go 1.16 that provides the
-		// range (start and end position) where the type error exists.
-		// There is no promise of backwards compatibility in future Go versions
-		// so we have to be extra careful here to be resilient.
-		v := reflect.ValueOf(err)
-		start := v.FieldByName("go116start")
-		end := v.FieldByName("go116end")
-		if start.IsValid() && end.IsValid() && start.Int() != end.Int() {
-			diag.StartPos = err.Fset.Position(token.Pos(start.Int()))
-			diag.EndPos = err.Fset.Position(token.Pos(end.Int()))
-		}
-		return []Diagnostic{diag}
 	case scanner.Error:
 		return []Diagnostic{
 			{
@@ -204,29 +188,25 @@ func (diag Diagnostic) WriteTo(w io.Writer, wd string) {
 		fmt.Fprintln(w, diag.Msg)
 		return
 	}
-	pos := RelativePosition(diag.Pos, wd)
+	pos := diag.Pos // make a copy
+	if !strings.HasPrefix(pos.Filename, filepath.Join(goenv.Get("GOROOT"), "src")) && !strings.HasPrefix(pos.Filename, filepath.Join(goenv.Get("TINYGOROOT"), "src")) {
+		// This file is not from the standard library (either the GOROOT or the
+		// TINYGOROOT). Make the path relative, for easier reading.  Ignore any
+		// errors in the process (falling back to the absolute path).
+		pos.Filename = tryToMakePathRelative(pos.Filename, wd)
+	}
 	fmt.Fprintf(w, "%s: %s\n", pos, diag.Msg)
 }
 
-// Convert the position in pos (assumed to have an absolute path) into a
+// try to make the path relative to the current working directory. If any error
-// relative path if possible. Paths inside GOROOT/TINYGOROOT will remain
+// occurs, this error is ignored and the absolute path is returned instead.
-// absolute.
+func tryToMakePathRelative(dir, wd string) string {
-func RelativePosition(pos token.Position, wd string) token.Position {
-	// Check whether we even have a working directory.
 	if wd == "" {
-		return pos
+		return dir // working directory not found
 	}
-
+	relpath, err := filepath.Rel(wd, dir)
-	// Paths inside GOROOT should be printed in full.
+	if err != nil {
-	if strings.HasPrefix(pos.Filename, filepath.Join(goenv.Get("GOROOT"), "src")) || strings.HasPrefix(pos.Filename, filepath.Join(goenv.Get("TINYGOROOT"), "src")) {
+		return dir
-		return pos
 	}
-
+	return relpath
-	// Make the path relative, for easier reading. Ignore any errors in the
-	// process (falling back to the absolute path).
-	relpath, err := filepath.Rel(wd, pos.Filename)
-	if err == nil {
-		pos.Filename = relpath
-	}
-	return pos
 }

errors_test.go

@@ -8,7 +8,6 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/tinygo-org/tinygo/builder"
 	"github.com/tinygo-org/tinygo/compileopts"
 	"github.com/tinygo-org/tinygo/diagnostics"
 )
@@ -65,11 +64,7 @@ func testErrorMessages(t *testing.T, filename string, options *compileopts.Optio
 
 	// Try to build a binary (this should fail with an error).
 	tmpdir := t.TempDir()
-	config, err := builder.NewConfig(options)
+	err := Build(filename, tmpdir+"/out", options)
-	if err != nil {
-		t.Fatal("expected to get a compiler error")
-	}
-	err = Build(filename, tmpdir+"/out", config)
 	if err == nil {
 		t.Fatal("expected to get a compiler error")
 	}

flake.lock

@@ -20,16 +20,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1770136044,
+        "lastModified": 1728500571,
-        "narHash": "sha256-tlFqNG/uzz2++aAmn4v8J0vAkV3z7XngeIIB3rM3650=",
+        "narHash": "sha256-dOymOQ3AfNI4Z337yEwHGohrVQb4yPODCW9MDUyAc4w=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e576e3c9cf9bad747afcddd9e34f51d18c855b4e",
+        "rev": "d51c28603def282a24fa034bcb007e2bcb5b5dd0",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-25.11",
+        "ref": "nixos-24.05",
         "type": "indirect"
       }
     },

flake.nix

@@ -21,6 +21,7 @@
 #   make llvm-source            # fetch compiler-rt
 #   git submodule update --init # fetch lots of other libraries and SVD files
 #   make gen-device -j4         # build src/device/*/*.go files
+#   make wasi-libc              # build support for wasi/wasm
 #
 # With this, you should have an environment that can compile anything - except
 # for the Xtensa architecture (ESP8266/ESP32) because support for that lives in
@@ -34,7 +35,7 @@
   inputs = {
     # Use a recent stable release, but fix the version to make it reproducible.
     # This version should be updated from time to time.
-    nixpkgs.url = "nixpkgs/nixos-25.11";
+    nixpkgs.url = "nixpkgs/nixos-24.05";
     flake-utils.url = "github:numtide/flake-utils";
   };
   outputs = { self, nixpkgs, flake-utils }:
@@ -48,11 +49,11 @@
           buildInputs = [
             # These dependencies are required for building tinygo (go install).
             go
-            llvmPackages_20.llvm
+            llvmPackages_18.llvm
-            llvmPackages_20.libclang
+            llvmPackages_18.libclang
             # Additional dependencies needed at runtime, for building and/or
             # flashing.
-            llvmPackages_20.lld
+            llvmPackages_18.lld
             avrdude
             binaryen
             # Additional dependencies needed for on-chip debugging.
@@ -63,12 +64,20 @@
             #openocd
           ];
           shellHook= ''
+            # Configure CLANG, LLVM_AR, and LLVM_NM for `make wasi-libc`.
+            # Without setting these explicitly, Homebrew versions might be used
+            # or the default `ar` and `nm` tools might be used (which don't
+            # support wasi).
+            export CLANG="clang-18 -resource-dir ${llvmPackages_18.clang.cc.lib}/lib/clang/18"
+            export LLVM_AR=llvm-ar
+            export LLVM_NM=llvm-nm
+
             # Make `make smoketest` work (the default is `md5`, while Nix only
             # has `md5sum`).
             export MD5SUM=md5sum
 
             # Ugly hack to make the Clang resources directory available.
-            export GOFLAGS="\"-ldflags=-X github.com/tinygo-org/tinygo/goenv.clangResourceDir=${llvmPackages_20.clang.cc.lib}/lib/clang/20\" -tags=llvm20"
+            export GOFLAGS="\"-ldflags=-X github.com/tinygo-org/tinygo/goenv.clangResourceDir=${llvmPackages_18.clang.cc.lib}/lib/clang/18\" -tags=llvm18"
           '';
         };
       }

go.mod

@@ -1,53 +1,37 @@
 module github.com/tinygo-org/tinygo
 
-go 1.23.0
+go 1.19
 
 require (
-	github.com/aykevl/go-wasm v0.0.2-0.20250317121156-42b86c494139
+	github.com/aykevl/go-wasm v0.0.2-0.20240825160117-b76c3f9f0982
 	github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2
+	github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee
+	github.com/chromedp/chromedp v0.7.6
 	github.com/gofrs/flock v0.8.1
-	github.com/golangci/misspell v0.6.0
 	github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf
 	github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf
 	github.com/marcinbor85/gohex v0.0.0-20200531091804-343a4b548892
 	github.com/mattn/go-colorable v0.1.13
 	github.com/mattn/go-tty v0.0.4
-	github.com/mgechev/revive v1.3.9
 	github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3
-	github.com/tetratelabs/wazero v1.9.0
+	github.com/tetratelabs/wazero v1.6.0
-	go.bug.st/serial v1.6.4
+	go.bug.st/serial v1.6.0
-	go.bytecodealliance.org v0.6.2
+	golang.org/x/net v0.26.0
-	go.bytecodealliance.org/cm v0.2.2
+	golang.org/x/sys v0.21.0
-	golang.org/x/net v0.35.0
+	golang.org/x/tools v0.22.1-0.20240621165957-db513b091504
-	golang.org/x/sys v0.30.0
-	golang.org/x/tools v0.30.0
 	gopkg.in/yaml.v2 v2.4.0
-	tinygo.org/x/espflasher v0.6.0
+	tinygo.org/x/go-llvm v0.0.0-20250119132755-9dca92dfb4f9
-	tinygo.org/x/go-llvm v0.0.0-20250422114502-b8f170971e74
 )
 
 require (
-	github.com/BurntSushi/toml v1.4.0 // indirect
+	github.com/chromedp/sysutil v1.0.0 // indirect
-	github.com/chavacava/garif v0.1.0 // indirect
-	github.com/coreos/go-semver v0.3.1 // indirect
 	github.com/creack/goselect v0.1.2 // indirect
-	github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 // indirect
+	github.com/gobwas/httphead v0.1.0 // indirect
-	github.com/fatih/color v1.17.0 // indirect
+	github.com/gobwas/pool v0.2.1 // indirect
-	github.com/fatih/structtag v1.2.0 // indirect
+	github.com/gobwas/ws v1.1.0 // indirect
-	github.com/hashicorp/go-version v1.7.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
-	github.com/klauspost/compress v1.17.11 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mattn/go-runewidth v0.0.9 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
-	github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 // indirect
+	golang.org/x/text v0.16.0 // indirect
-	github.com/mitchellh/go-homedir v1.1.0 // indirect
-	github.com/olekukonko/tablewriter v0.0.5 // indirect
-	github.com/opencontainers/go-digest v1.0.0 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
-	github.com/regclient/regclient v0.8.2 // indirect
-	github.com/sirupsen/logrus v1.9.3 // indirect
-	github.com/spf13/afero v1.11.0 // indirect
-	github.com/ulikunitz/xz v0.5.12 // indirect
-	github.com/urfave/cli/v3 v3.0.0-beta1 // indirect
-	golang.org/x/mod v0.23.0 // indirect
-	golang.org/x/text v0.22.0 // indirect
 )

go.sum

@@ -1,36 +1,33 @@
-github.com/BurntSushi/toml v1.4.0 h1:kuoIxZQy2WRRk1pttg9asf+WVv6tWQuBNVmK8+nqPr0=
+github.com/aykevl/go-wasm v0.0.2-0.20240825160117-b76c3f9f0982 h1:cD7QfvrJdYmBw2tFP/VyKPT8ZESlcrwSwo7SvH9Y4dc=
-github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/aykevl/go-wasm v0.0.2-0.20240825160117-b76c3f9f0982/go.mod h1:7sXyiaA0WtSogCu67R2252fQpVmJMh9JWJ9ddtGkpWw=
-github.com/aykevl/go-wasm v0.0.2-0.20250317121156-42b86c494139 h1:2O/WuAt8J5id3khcAtVB90czG80m+v0sfkLE07GrCVg=
-github.com/aykevl/go-wasm v0.0.2-0.20250317121156-42b86c494139/go.mod h1:7sXyiaA0WtSogCu67R2252fQpVmJMh9JWJ9ddtGkpWw=
 github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2 h1:oMCHnXa6CCCafdPDbMh/lWRhRByN0VFLvv+g+ayx1SI=
 github.com/blakesmith/ar v0.0.0-20150311145944-8bd4349a67f2/go.mod h1:PkYb9DJNAwrSvRx5DYA+gUcOIgTGVMNkfSCbZM8cWpI=
-github.com/chavacava/garif v0.1.0 h1:2JHa3hbYf5D9dsgseMKAmc/MZ109otzgNFk5s87H9Pc=
+github.com/chromedp/cdproto v0.0.0-20211126220118-81fa0469ad77/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
-github.com/chavacava/garif v0.1.0/go.mod h1:XMyYCkEL58DF0oyW4qDjjnPWONs2HBqYKI+UIPD+Gww=
+github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee h1:+SFdIVfQpG0s0DHYzou0kgfE0n0ZjKPwbiRJsXrZegU=
-github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=
+github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
-github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
+github.com/chromedp/chromedp v0.7.6 h1:2juGaktzjwULlsn+DnvIZXFUckEp5xs+GOBroaea+jA=
+github.com/chromedp/chromedp v0.7.6/go.mod h1:ayT4YU/MGAALNfOg9gNrpGSAdnU51PMx+FCeuT1iXzo=
+github.com/chromedp/sysutil v1.0.0 h1:+ZxhTpfpZlmchB58ih/LBHX52ky7w2VhQVKQMucy3Ic=
+github.com/chromedp/sysutil v1.0.0/go.mod h1:kgWmDdq8fTzXYcKIBqIYvRRTnYb9aNS9moAV0xufSww=
 github.com/creack/goselect v0.1.2 h1:2DNy14+JPjRBgPzAd1thbQp4BSIihxcBf0IXhQXDRa0=
 github.com/creack/goselect v0.1.2/go.mod h1:a/NhLweNvqIYMuxcMOuWY516Cimucms3DglDzQP3hKY=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU=
-github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 h1:UhxFibDNY/bfvqU5CAUmr9zpesgbU6SWc8/B4mflAE4=
+github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
-github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7/go.mod h1:cyGadeNEkKy96OOhEzfZl+yxihPEzKnqJwvfuSUqbZE=
+github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
-github.com/fatih/color v1.17.0 h1:GlRw1BRJxkpqUCBKzKOw098ed57fEsKeNjpTe3cSjK4=
+github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
-github.com/fatih/color v1.17.0/go.mod h1:YZ7TlrGPkiz6ku9fK3TLD/pl3CpsiFyu8N92HLgmosI=
+github.com/gobwas/ws v1.1.0 h1:7RFti/xnNkMJnrK7D1yQ/iCIB5OrrY/54/H930kIbHA=
-github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
+github.com/gobwas/ws v1.1.0/go.mod h1:nzvNcVha5eUziGrbxFCo6qFIojQHjJV5cLYIbezhfL0=
-github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
 github.com/gofrs/flock v0.8.1 h1:+gYjHKf32LDeiEEFhQaotPbLuUXjY5ZqxKgXy7n59aw=
 github.com/gofrs/flock v0.8.1/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
-github.com/golangci/misspell v0.6.0 h1:JCle2HUTNWirNlDIAUO44hUsKhOFqGPoC4LZxlaSXDs=
-github.com/golangci/misspell v0.6.0/go.mod h1:keMNyY6R9isGaSAu+4Q8NMBwMPkh15Gtc8UCVoDtAWo=
 github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf h1:7+FW5aGwISbqUtkfmIpZJGRgNFg2ioYPvFaUxdqpDsg=
 github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf/go.mod h1:RpwtwJQFrIEPstU94h88MWPXP2ektJZ8cZ0YntAmXiE=
-github.com/hashicorp/go-version v1.7.0 h1:5tqGy27NaOTB8yJKUZELlFAS/LTKJkrmONwQKeRZfjY=
-github.com/hashicorp/go-version v1.7.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
 github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf h1:FtEj8sfIcaaBfAKrE1Cwb61YDtYq9JxChK1c7AKce7s=
 github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf/go.mod h1:yrqSXGoD/4EKfF26AOGzscPOgTTJcyAwM2rpixWT+t4=
-github.com/klauspost/compress v1.17.11 h1:In6xLpyWOi1+C7tXUUWv2ot1QvBjxevKAaI6IXrJmUc=
+github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
-github.com/klauspost/compress v1.17.11/go.mod h1:pMDklpSncoRMuLFrf1W9Ss9KT+0rH90U12bZKk7uwG0=
+github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
+github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
+github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
 github.com/marcinbor85/gohex v0.0.0-20200531091804-343a4b548892 h1:6J+qramlHVLmiBOgRiBOnQkno8uprqG6YFFQTt6uYIw=
 github.com/marcinbor85/gohex v0.0.0-20200531091804-343a4b548892/go.mod h1:Pb6XcsXyropB9LNHhnqaknG/vEwYztLkQzVCHv8sQ3M=
 github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
@@ -42,83 +39,40 @@ github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
-github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
-github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-tty v0.0.4 h1:NVikla9X8MN0SQAqCYzpGyXv0jY7MNl3HOWD2dkle7E=
 github.com/mattn/go-tty v0.0.4/go.mod h1:u5GGXBtZU6RQoKV8gY5W6UhMudbR5vXnUe7j3pxse28=
-github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 h1:zpIH83+oKzcpryru8ceC6BxnoG8TBrhgAvRg8obzup0=
+github.com/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5 h1:1SoBaSPudixRecmlHXb/GxmaD3fLMtHIDN13QujwQuc=
-github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517/go.mod h1:KQ7+USdGKfpPjXk4Ga+5XxQM4Lm4e3gAogrreFAYpOg=
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-github.com/mgechev/revive v1.3.9 h1:18Y3R4a2USSBF+QZKFQwVkBROUda7uoBlkEuBD+YD1A=
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-github.com/olareg/olareg v0.1.1/go.mod h1:w8NP4SWrHHtxsFaUiv1lnCnYPm4sN1seCd2h7FK/dc0=
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-go.bytecodealliance.org/cm v0.2.2 h1:M9iHS6qs884mbQbIjtLX1OifgyPG9DuMs2iwz8G4WQA=
-go.bytecodealliance.org/cm v0.2.2/go.mod h1:JD5vtVNZv7sBoQQkvBvAAVKJPhR/bqBH7yYXTItMfZI=
-golang.org/x/mod v0.23.0 h1:Zb7khfcRGKk+kqfxFaP5tZqCnDZMjC5VtUBs87Hr6QM=
-golang.org/x/mod v0.23.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
-golang.org/x/net v0.35.0 h1:T5GQRQb2y08kTAByq9L4/bz8cipCdA8FbRTXewonqY8=
-golang.org/x/net v0.35.0/go.mod h1:EglIi67kWsHKlRzzVMUD93VMSWGFOMSZgxFjparz1Qk=
-golang.org/x/sync v0.11.0 h1:GGz8+XQP4FvTTrjZPzNKTMFtSXH80RAzG+5ghFPgK9w=
-golang.org/x/sync v0.11.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20201207223542-d4d67f95c62d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20211124211545-fe61309f8881/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
-golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
-golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
-golang.org/x/tools v0.30.0 h1:BgcpHewrV5AUp2G9MebG4XPFI1E2W41zU1SaqVA9vJY=
+golang.org/x/tools v0.22.1-0.20240621165957-db513b091504 h1:MMsD8mMfluf/578+3wrTn22pjI/Xkzm+gPW47SYfspY=
-golang.org/x/tools v0.30.0/go.mod h1:c347cR/OJfw5TI+GfX7RUPNMdDRRbjvYTS0jPyvsVtY=
+golang.org/x/tools v0.22.1-0.20240621165957-db513b091504/go.mod h1:aCwcsjqvq7Yqt6TNyX7QMU2enbQ/Gt0bo6krSeEri+c=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+tinygo.org/x/go-llvm v0.0.0-20250119132755-9dca92dfb4f9 h1:rMvEzuCYjyiR+pmdiCVWTQw3L6VqiSIXoL19I3lYufE=
-tinygo.org/x/espflasher v0.6.0 h1:CHbGMHAIWq1tB8FKd/QwBpNFw1jvHHxpmvZiF+QOYUo=
+tinygo.org/x/go-llvm v0.0.0-20250119132755-9dca92dfb4f9/go.mod h1:GFbusT2VTA4I+l4j80b17KFK+6whv69Wtny5U+T8RR0=
-tinygo.org/x/espflasher v0.6.0/go.mod h1:tr5u08HoE67WD5zxJesCiiVF/R1b6Akz3yXwh5zah8U=
-tinygo.org/x/go-llvm v0.0.0-20250422114502-b8f170971e74 h1:ovavgTdIBWCH8YWlcfq9gkpoyT1+IxMKSn+Df27QwE8=
-tinygo.org/x/go-llvm v0.0.0-20250422114502-b8f170971e74/go.mod h1:GFbusT2VTA4I+l4j80b17KFK+6whv69Wtny5U+T8RR0=

goenv/version.go

@@ -10,7 +10,7 @@ import (
 
 // Version of TinyGo.
 // Update this value before release of new version of software.
-const version = "0.41.1"
+const version = "0.36.0-dev"
 
 // Return TinyGo version, either in the form 0.30.0 or as a development version
 // (like 0.30.0-dev-abcd012).

internal/tools/go.mod

@@ -0,0 +1,30 @@
+// TODO: remove this (by merging it into the top-level go.mod)
+// once the top level go.mod specifies a go new enough to make our version of misspell happy.
+
+module tools
+
+go 1.21
+
+require (
+	github.com/golangci/misspell v0.6.0
+	github.com/mgechev/revive v1.3.9
+)
+
+require (
+	github.com/BurntSushi/toml v1.4.0 // indirect
+	github.com/chavacava/garif v0.1.0 // indirect
+	github.com/fatih/color v1.17.0 // indirect
+	github.com/fatih/structtag v1.2.0 // indirect
+	github.com/hashicorp/go-version v1.7.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-runewidth v0.0.9 // indirect
+	github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/tools v0.23.0 // indirect
+)

internal/tools/go.sum

@@ -0,0 +1,56 @@
+github.com/BurntSushi/toml v1.4.0 h1:kuoIxZQy2WRRk1pttg9asf+WVv6tWQuBNVmK8+nqPr0=
+github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/chavacava/garif v0.1.0 h1:2JHa3hbYf5D9dsgseMKAmc/MZ109otzgNFk5s87H9Pc=
+github.com/chavacava/garif v0.1.0/go.mod h1:XMyYCkEL58DF0oyW4qDjjnPWONs2HBqYKI+UIPD+Gww=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fatih/color v1.17.0 h1:GlRw1BRJxkpqUCBKzKOw098ed57fEsKeNjpTe3cSjK4=
+github.com/fatih/color v1.17.0/go.mod h1:YZ7TlrGPkiz6ku9fK3TLD/pl3CpsiFyu8N92HLgmosI=
+github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
+github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
+github.com/golangci/misspell v0.6.0 h1:JCle2HUTNWirNlDIAUO44hUsKhOFqGPoC4LZxlaSXDs=
+github.com/golangci/misspell v0.6.0/go.mod h1:keMNyY6R9isGaSAu+4Q8NMBwMPkh15Gtc8UCVoDtAWo=
+github.com/hashicorp/go-version v1.7.0 h1:5tqGy27NaOTB8yJKUZELlFAS/LTKJkrmONwQKeRZfjY=
+github.com/hashicorp/go-version v1.7.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
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+github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
+github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
+github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517 h1:zpIH83+oKzcpryru8ceC6BxnoG8TBrhgAvRg8obzup0=
+github.com/mgechev/dots v0.0.0-20210922191527-e955255bf517/go.mod h1:KQ7+USdGKfpPjXk4Ga+5XxQM4Lm4e3gAogrreFAYpOg=
+github.com/mgechev/revive v1.3.9 h1:18Y3R4a2USSBF+QZKFQwVkBROUda7uoBlkEuBD+YD1A=
+github.com/mgechev/revive v1.3.9/go.mod h1:+uxEIr5UH0TjXWHTno3xh4u7eg6jDpXKzQccA9UGhHU=
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+github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
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+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
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+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
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+golang.org/x/tools v0.23.0 h1:SGsXPZ+2l4JsgaCKkx+FQ9YZ5XEtA1GZYuoDjenLjvg=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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internal/tools/tools.go

@@ -2,15 +2,12 @@
 
 // Install tools specified in go.mod.
 // See https://marcofranssen.nl/manage-go-tools-via-go-modules for idiom.
-package main
+package tools
 
 import (
 	_ "github.com/golangci/misspell"
 	_ "github.com/mgechev/revive"
-	_ "go.bytecodealliance.org/cm"
-	_ "go.bytecodealliance.org/cmd/wit-bindgen-go"
 )
 
 //go:generate go install github.com/golangci/misspell/cmd/misspell
 //go:generate go install github.com/mgechev/revive
-//go:generate go install go.bytecodealliance.org/cmd/wit-bindgen-go

internal/wasm-tools/README.md

@@ -0,0 +1,5 @@
+# wasm-tools directory
+
+This directory has a separate `go.mod` file because the `wasm-tools-go` module requires Go 1.22, while TinyGo itself supports Go 1.19.
+
+When the minimum Go version for TinyGo is 1.22, this directory can be folded into `internal/tools` and the `go.mod` and `go.sum` files deleted.

internal/wasm-tools/go.mod

@@ -0,0 +1,18 @@
+module github.com/tinygo-org/tinygo/internal/tools
+
+go 1.22.4
+
+require github.com/bytecodealliance/wasm-tools-go v0.3.1
+
+require (
+	github.com/coreos/go-semver v0.3.1 // indirect
+	github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/regclient/regclient v0.7.1 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/ulikunitz/xz v0.5.12 // indirect
+	github.com/urfave/cli/v3 v3.0.0-alpha9.2 // indirect
+	golang.org/x/mod v0.21.0 // indirect
+	golang.org/x/sys v0.26.0 // indirect
+)

internal/wasm-tools/go.sum

@@ -0,0 +1,44 @@
+github.com/bytecodealliance/wasm-tools-go v0.3.1 h1:9Q9PjSzkbiVmkUvZ7nYCfJ02mcQDBalxycA3s8g7kR4=
+github.com/bytecodealliance/wasm-tools-go v0.3.1/go.mod h1:vNAQ8DAEp6xvvk+TUHah5DslLEa76f4H6e737OeaxuY=
+github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=
+github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 h1:UhxFibDNY/bfvqU5CAUmr9zpesgbU6SWc8/B4mflAE4=
+github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7/go.mod h1:cyGadeNEkKy96OOhEzfZl+yxihPEzKnqJwvfuSUqbZE=
+github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
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+github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/regclient/regclient v0.7.1 h1:qEsJrTmZd98fZKjueAbrZCSNGU+ifnr6xjlSAs3WOPs=
+github.com/regclient/regclient v0.7.1/go.mod h1:+w/BFtJuw0h0nzIw/z2+1FuA2/dVXBzDq4rYmziJpMc=
+github.com/sergi/go-diff v1.3.1 h1:xkr+Oxo4BOQKmkn/B9eMK0g5Kg/983T9DqqPHwYqD+8=
+github.com/sergi/go-diff v1.3.1/go.mod h1:aMJSSKb2lpPvRNec0+w3fl7LP9IOFzdc9Pa4NFbPK1I=
+github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
+github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/ulikunitz/xz v0.5.12 h1:37Nm15o69RwBkXM0J6A5OlE67RZTfzUxTj8fB3dfcsc=
+github.com/ulikunitz/xz v0.5.12/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
+github.com/urfave/cli/v3 v3.0.0-alpha9.2 h1:CL8llQj3dGRLVQQzHxS+ZYRLanOuhyK1fXgLKD+qV+Y=
+github.com/urfave/cli/v3 v3.0.0-alpha9.2/go.mod h1:FnIeEMYu+ko8zP1F9Ypr3xkZMIDqW3DR92yUtY39q1Y=
+golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=
+golang.org/x/mod v0.21.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
+golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
+golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
+golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/tools v0.26.0 h1:v/60pFQmzmT9ExmjDv2gGIfi3OqfKoEP6I5+umXlbnQ=
+golang.org/x/tools v0.26.0/go.mod h1:TPVVj70c7JJ3WCazhD8OdXcZg/og+b9+tH/KxylGwH0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/wasm-tools/tools.go

@@ -0,0 +1,11 @@
+//go:build tools
+
+// Install tools specified in go.mod.
+// See https://marcofranssen.nl/manage-go-tools-via-go-modules for idiom.
+package tools
+
+import (
+	_ "github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go"
+)
+
+//go:generate go install github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go

interp/errors.go

@@ -29,7 +29,7 @@ var errInvalidPtrToIntSize = errors.New("interp: ptrtoint integer size does not
 func isRecoverableError(err error) bool {
 	return err == errIntegerAsPointer || err == errUnsupportedInst ||
 		err == errUnsupportedRuntimeInst || err == errMapAlreadyCreated ||
-		err == errLoopUnrolled || err == errInvalidPtrToIntSize
+		err == errLoopUnrolled
 }
 
 // ErrorLine is one line in a traceback. The position may be missing.

interp/interp_test.go

@@ -2,6 +2,7 @@ package interp
 
 import (
 	"os"
+	"strconv"
 	"strings"
 	"testing"
 	"time"
@@ -10,17 +11,25 @@ import (
 )
 
 func TestInterp(t *testing.T) {
+	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 _, name := range []string{
 		"basic",
 		"phi",
+		"slice-copy",
 		"consteval",
-		"intrinsics",
-		"copy",
 		"interface",
 		"revert",
 		"alloc",
 	} {
 		name := name // make local to this closure
+		if name == "slice-copy" && llvmVersion < 14 {
+			continue
+		}
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
 			runTest(t, "testdata/"+name)

interp/interpreter.go

@@ -312,28 +312,33 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 					fmt.Fprintln(os.Stderr, indent+"runtime.alloc:", size, "->", ptr)
 				}
 				locals[inst.localIndex] = ptr
-			case strings.HasPrefix(callFn.name, "llvm.umin."):
+			case callFn.name == "runtime.sliceCopy":
-				locals[inst.localIndex] = makeLiteralInt(min(operands[1].Uint(r), operands[2].Uint(r)), inst.llvmInst.Type().IntTypeWidth())
+				// sliceCopy implements the built-in copy function for slices.
-			case strings.HasPrefix(callFn.name, "llvm.smin."):
+				// It is implemented here so that it can be used even if the
-				locals[inst.localIndex] = makeLiteralInt(uint64(min(operands[1].Int(r), operands[2].Int(r))), inst.llvmInst.Type().IntTypeWidth())
+				// runtime implementation is not available. Doing it this way
-			case strings.HasPrefix(callFn.name, "llvm.umax."):
+				// may also be faster.
-				locals[inst.localIndex] = makeLiteralInt(max(operands[1].Uint(r), operands[2].Uint(r)), inst.llvmInst.Type().IntTypeWidth())
+				// Code:
-			case strings.HasPrefix(callFn.name, "llvm.smax."):
+				// func sliceCopy(dst, src unsafe.Pointer, dstLen, srcLen uintptr, elemSize uintptr) int {
-				locals[inst.localIndex] = makeLiteralInt(uint64(max(operands[1].Int(r), operands[2].Int(r))), inst.llvmInst.Type().IntTypeWidth())
+				//     n := srcLen
-			case strings.HasPrefix(callFn.name, "llvm.memcpy.p0") || strings.HasPrefix(callFn.name, "llvm.memmove.p0"):
+				//     if n > dstLen {
-				// Copy a block of memory from one pointer to another.
+				//         n = dstLen
-				if operands[4].Uint(r) != 0 {
+				//     }
-					// This is a volatile copy/move.
+				//     memmove(dst, src, n*elemSize)
-					err := r.runAtRuntime(fn, inst, locals, &mem, indent)
+				//     return int(n)
-					if err != nil {
+				// }
-						return nil, mem, err
+				dstLen := operands[3].Uint(r)
-					}
+				srcLen := operands[4].Uint(r)
-					continue
+				elemSize := operands[5].Uint(r)
+				n := srcLen
+				if n > dstLen {
+					n = dstLen
 				}
-				nBytes := operands[3].Uint(r)
+				if r.debug {
-				if nBytes != 0 {
+					fmt.Fprintln(os.Stderr, indent+"copy:", operands[1], operands[2], n)
+				}
+				if n != 0 {
 					// Only try to copy bytes when there are any bytes to copy.
-					// This is not just an optimization. If one of the pointers
+					// This is not just an optimization. If one of the slices
 					// (or both) are nil, the asPointer method call will fail
 					// even though copying a nil slice is allowed.
 					dst, err := operands[1].asPointer(r)
@@ -358,26 +363,37 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 						}
 						continue
 					}
-					srcObj := mem.get(src.index())
+					nBytes := uint32(n * elemSize)
 					dstObj := mem.getWritable(dst.index())
-					if srcObj.buffer == nil || dstObj.buffer == nil {
-						// If the buffer is nil, it means the memory is external.
-						// This can happen for example when copying data out of
-						// a //go:embed slice, which is not available at interp
-						// time.
-						// See: https://github.com/tinygo-org/tinygo/issues/4895
-						err := r.runAtRuntime(fn, inst, locals, &mem, indent)
-						if err != nil {
-							return nil, mem, err
-						}
-						continue
-					}
 					dstBuf := dstObj.buffer.asRawValue(r)
-					srcBuf := srcObj.buffer.asRawValue(r)
+					srcBuf := mem.get(src.index()).buffer.asRawValue(r)
-					copy(dstBuf.buf[dst.offset():][:nBytes], srcBuf.buf[src.offset():][:nBytes])
+					copy(dstBuf.buf[dst.offset():dst.offset()+nBytes], srcBuf.buf[src.offset():])
 					dstObj.buffer = dstBuf
 					mem.put(dst.index(), dstObj)
 				}
+				locals[inst.localIndex] = makeLiteralInt(n, inst.llvmInst.Type().IntTypeWidth())
+			case strings.HasPrefix(callFn.name, "llvm.memcpy.p0") || strings.HasPrefix(callFn.name, "llvm.memmove.p0"):
+				// Copy a block of memory from one pointer to another.
+				dst, err := operands[1].asPointer(r)
+				if err != nil {
+					return nil, mem, r.errorAt(inst, err)
+				}
+				src, err := operands[2].asPointer(r)
+				if err != nil {
+					return nil, mem, r.errorAt(inst, err)
+				}
+				nBytes := uint32(operands[3].Uint(r))
+				dstObj := mem.getWritable(dst.index())
+				dstBuf := dstObj.buffer.asRawValue(r)
+				if mem.get(src.index()).buffer == nil {
+					// Looks like the source buffer is not defined.
+					// This can happen with //extern or //go:embed.
+					return nil, mem, r.errorAt(inst, errUnsupportedRuntimeInst)
+				}
+				srcBuf := mem.get(src.index()).buffer.asRawValue(r)
+				copy(dstBuf.buf[dst.offset():dst.offset()+nBytes], srcBuf.buf[src.offset():])
+				dstObj.buffer = dstBuf
+				mem.put(dst.index(), dstObj)
 			case callFn.name == "runtime.typeAssert":
 				// This function must be implemented manually as it is normally
 				// implemented by the interface lowering pass.
@@ -413,6 +429,64 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 				// Special function that will trigger an error.
 				// This is used to test error reporting.
 				return nil, mem, r.errorAt(inst, errors.New("test error"))
+			case strings.HasSuffix(callFn.name, ".$typeassert"):
+				if r.debug {
+					fmt.Fprintln(os.Stderr, indent+"interface assert:", operands[1:])
+				}
+
+				// Load various values for the interface implements check below.
+				typecodePtr, err := operands[1].asPointer(r)
+				if err != nil {
+					return nil, mem, r.errorAt(inst, err)
+				}
+				// typecodePtr always point to the numMethod field in the type
+				// description struct. The methodSet, when present, comes right
+				// before the numMethod field (the compiler doesn't generate
+				// method sets for concrete types without methods).
+				// Considering that the compiler doesn't emit interface type
+				// asserts for interfaces with no methods (as the always succeed)
+				// then if the offset is zero, this assert must always fail.
+				if typecodePtr.offset() == 0 {
+					locals[inst.localIndex] = literalValue{uint8(0)}
+					break
+				}
+				typecodePtrOffset, err := typecodePtr.addOffset(-int64(r.pointerSize))
+				if err != nil {
+					return nil, mem, r.errorAt(inst, err)
+				}
+				methodSetPtr, err := mem.load(typecodePtrOffset, r.pointerSize).asPointer(r)
+				if err != nil {
+					return nil, mem, r.errorAt(inst, err)
+				}
+				methodSet := mem.get(methodSetPtr.index()).llvmGlobal.Initializer()
+				numMethods := int(r.builder.CreateExtractValue(methodSet, 0, "").ZExtValue())
+				llvmFn := inst.llvmInst.CalledValue()
+				methodSetAttr := llvmFn.GetStringAttributeAtIndex(-1, "tinygo-methods")
+				methodSetString := methodSetAttr.GetStringValue()
+
+				// Make a set of all the methods on the concrete type, for
+				// easier checking in the next step.
+				concreteTypeMethods := map[string]struct{}{}
+				for i := 0; i < numMethods; i++ {
+					methodInfo := r.builder.CreateExtractValue(methodSet, 1, "")
+					name := r.builder.CreateExtractValue(methodInfo, i, "").Name()
+					concreteTypeMethods[name] = struct{}{}
+				}
+
+				// Check whether all interface methods are also in the list
+				// of defined methods calculated above. This is the interface
+				// assert itself.
+				assertOk := uint8(1) // i1 true
+				for _, name := range strings.Split(methodSetString, "; ") {
+					if _, ok := concreteTypeMethods[name]; !ok {
+						// There is a method on the interface that is not
+						// implemented by the type. The assertion will fail.
+						assertOk = 0 // i1 false
+						break
+					}
+				}
+				// If assertOk is still 1, the assertion succeeded.
+				locals[inst.localIndex] = literalValue{assertOk}
 			case strings.HasSuffix(callFn.name, "$invoke"):
 				// This thunk is the interface method dispatcher: it is called
 				// with all regular parameters and a type code. It will then
@@ -490,7 +564,7 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 						// runtime instead of at compile time. But we need to
 						// revert any changes made by the call first.
 						if r.debug {
-							fmt.Fprintln(os.Stderr, indent+"!! revert because of error:", callErr.Error())
+							fmt.Fprintln(os.Stderr, indent+"!! revert because of error:", callErr.Err)
 						}
 						callMem.revert()
 						err := r.runAtRuntime(fn, inst, locals, &mem, indent)

interp/memory.go

@@ -824,6 +824,19 @@ func (v rawValue) rawLLVMValue(mem *memoryView) (llvm.Value, error) {
 			if err != nil {
 				return llvm.Value{}, err
 			}
+			if !field.IsAGlobalVariable().IsNil() {
+				elementType := field.GlobalValueType()
+				if elementType.TypeKind() == llvm.StructTypeKind {
+					// There are some special pointer types that should be used
+					// as a ptrtoint, so that they can be used in certain
+					// optimizations.
+					name := elementType.StructName()
+					if name == "runtime.funcValueWithSignature" {
+						uintptrType := ctx.IntType(int(mem.r.pointerSize) * 8)
+						field = llvm.ConstPtrToInt(field, uintptrType)
+					}
+				}
+			}
 			structFields = append(structFields, field)
 			i += mem.r.pointerSize
 			continue

interp/testdata/basic.out.ll

@@ -10,7 +10,7 @@ target triple = "x86_64--linux"
 @main.exposedValue2 = local_unnamed_addr global i16 0
 @main.insertedValue = local_unnamed_addr global { i8, i32, { float, { i64, i16 } } } zeroinitializer
 @main.gepArray = local_unnamed_addr global [8 x i8] zeroinitializer
-@main.negativeGEP = global ptr getelementptr inbounds nuw (i8, ptr @main.negativeGEP, i64 2)
+@main.negativeGEP = global ptr getelementptr inbounds (i8, ptr @main.negativeGEP, i64 2)
 
 declare void @runtime.printint64(i64) unnamed_addr
 

interp/testdata/consteval.out.ll

@@ -5,7 +5,7 @@ target triple = "x86_64--linux"
 @ptrToIntResult = local_unnamed_addr global i8 2
 @pointerTagResult = local_unnamed_addr global i64 2
 @someArray = internal global { i16, i8, i8 } zeroinitializer
-@someArrayPointer = local_unnamed_addr global ptr getelementptr inbounds nuw (i8, ptr @someArray, i64 2)
+@someArrayPointer = local_unnamed_addr global ptr getelementptr inbounds (i8, ptr @someArray, i64 2)
 
 define void @runtime.initAll() local_unnamed_addr {
   ret void

interp/testdata/copy.ll

@@ -1,68 +0,0 @@
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64--linux"
-
-@string = internal unnamed_addr constant [3 x i8] c"foo"
-@moveDst = global [3 x i8] zeroinitializer
-@copyDst = global [3 x i8] zeroinitializer
-
-@externalSrc = external global [2 x i8]
-@moveExternalDst = global [2 x i8] zeroinitializer
-
-@moveEscapedSrc = global [4 x i8] c"abcd"
-@moveEscapedDst = global [4 x i8] zeroinitializer
-
-@volatileSrc = global [2 x i8] c"xy"
-@volatileDst = global [2 x i8] zeroinitializer
-
-declare void @use(ptr)
-
-define void @runtime.initAll() {
-  call void @main.init()
-  ret void
-}
-
-define internal void @main.init() {
-  call void @testMove()
-  call void @testCopy()
-  call void @testMoveExternal()
-  call void @testMoveEscaped()
-  call void @testVolatileCopy()
-  ret void
-}
-
-; Test a simple memmove between globals.
-define internal void @testMove() {
-  call void @llvm.memmove.p0.p0.i64(ptr @moveDst, ptr @string, i64 3, i1 false)
-  ret void
-}
-
-; Test a simple memcpy between globals.
-define internal void @testCopy() {
-  call void @llvm.memcpy.p0.p0.i64(ptr @copyDst, ptr @string, i64 3, i1 false)
-  ret void
-}
-
-; Test a memmove from an external global.
-; This should be run at runtime.
-define internal void @testMoveExternal() {
-  call void @llvm.memmove.p0.p0.i64(ptr @moveExternalDst, ptr @externalSrc, i64 2, i1 false)
-  ret void
-}
-
-; Test a memmove from an escaped (and potentially modified) source buffer.
-define internal void @testMoveEscaped() {
-  call void @use(ptr @moveEscapedSrc)
-  call void @llvm.memmove.p0.p0.i64(ptr @moveEscapedDst, ptr @moveEscapedSrc, i64 4, i1 false)
-  ret void
-}
-
-; Test a volatile memcpy.
-; This should always be run at runtime.
-define internal void @testVolatileCopy() {
-  call void @llvm.memcpy.p0.p0.i64(ptr @volatileDst, ptr @volatileSrc, i64 2, i1 true)
-  ret void
-}
-
-declare void @llvm.memmove.p0.p0.i64(ptr, ptr, i64, i1)
-
-declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)

interp/testdata/copy.out.ll

@@ -1,27 +0,0 @@
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64--linux"
-
-@moveDst = local_unnamed_addr global [3 x i8] c"foo"
-@copyDst = local_unnamed_addr global [3 x i8] c"foo"
-@externalSrc = external local_unnamed_addr global [2 x i8]
-@moveExternalDst = local_unnamed_addr global [2 x i8] zeroinitializer
-@moveEscapedSrc = global [4 x i8] c"abcd"
-@moveEscapedDst = local_unnamed_addr global [4 x i8] zeroinitializer
-@volatileSrc = global [2 x i8] c"xy"
-@volatileDst = global [2 x i8] zeroinitializer
-
-declare void @use(ptr) local_unnamed_addr
-
-define void @runtime.initAll() local_unnamed_addr {
-  call void @llvm.memmove.p0.p0.i64(ptr @moveExternalDst, ptr @externalSrc, i64 2, i1 false)
-  call void @use(ptr @moveEscapedSrc)
-  call void @llvm.memmove.p0.p0.i64(ptr @moveEscapedDst, ptr @moveEscapedSrc, i64 4, i1 false)
-  call void @llvm.memcpy.p0.p0.i64(ptr @volatileDst, ptr @volatileSrc, i64 2, i1 true)
-  ret void
-}
-
-declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg) #0
-
-declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0
-
-attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }

interp/testdata/intrinsics.ll

@@ -1,52 +0,0 @@
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64--linux"
-
-@uminResult = global i32 0
-@sminResult = global i32 0
-@umaxResult = global i32 0
-@smaxResult = global i32 0
-
-define void @runtime.initAll() {
-  call void @main.init()
-  ret void
-}
-
-define internal void @main.init() {
-  call void @testUMin()
-  call void @testSMin()
-  call void @testUMax()
-  call void @testSMax()
-  ret void
-}
-
-define internal void @testUMin() {
-  %umin = call i32 @llvm.umin.i32(i32 12, i32 -1)
-  store i32 %umin, ptr @uminResult
-  ret void
-}
-
-declare i32 @llvm.umin.i32(i32, i32)
-
-define internal void @testSMin() {
-  %smin = call i32 @llvm.smin.i32(i32 12, i32 -1)
-  store i32 %smin, ptr @sminResult
-  ret void
-}
-
-declare i32 @llvm.smin.i32(i32, i32)
-
-define internal void @testUMax() {
-  %umax = call i32 @llvm.umax.i32(i32 12, i32 -1)
-  store i32 %umax, ptr @umaxResult
-  ret void
-}
-
-declare i32 @llvm.umax.i32(i32, i32)
-
-define internal void @testSMax() {
-  %smax = call i32 @llvm.smax.i32(i32 12, i32 -1)
-  store i32 %smax, ptr @smaxResult
-  ret void
-}
-
-declare i32 @llvm.smax.i32(i32, i32)

interp/testdata/intrinsics.out.ll

@@ -1,11 +0,0 @@
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64--linux"
-
-@uminResult = local_unnamed_addr global i32 12
-@sminResult = local_unnamed_addr global i32 -1
-@umaxResult = local_unnamed_addr global i32 -1
-@smaxResult = local_unnamed_addr global i32 12
-
-define void @runtime.initAll() local_unnamed_addr {
-  ret void
-}

interp/testdata/slice-copy.ll

@@ -0,0 +1,106 @@
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64--linux"
+
+@main.uint8SliceSrc.buf = internal global [2 x i8] c"\03d"
+@main.uint8SliceSrc = internal unnamed_addr global { ptr, i64, i64 } { ptr @main.uint8SliceSrc.buf, i64 2, i64 2 }
+@main.uint8SliceDst = internal unnamed_addr global { ptr, i64, i64 } zeroinitializer
+@main.int16SliceSrc.buf = internal global [3 x i16] [i16 5, i16 123, i16 1024]
+@main.int16SliceSrc = internal unnamed_addr global { ptr, i64, i64 } { ptr @main.int16SliceSrc.buf, i64 3, i64 3 }
+@main.int16SliceDst = internal unnamed_addr global { ptr, i64, i64 } zeroinitializer
+@main.sliceSrcUntaint.buf = internal global [2 x i8] c"ab"
+@main.sliceDstUntaint.buf = internal global [2 x i8] zeroinitializer
+@main.sliceSrcTaint.buf = internal global [2 x i8] c"cd"
+@main.sliceDstTaint.buf = internal global [2 x i8] zeroinitializer
+
+declare i64 @runtime.sliceCopy(ptr %dst, ptr %src, i64 %dstLen, i64 %srcLen, i64 %elemSize) unnamed_addr
+
+declare ptr @runtime.alloc(i64, ptr) unnamed_addr
+
+declare void @runtime.printuint8(i8)
+
+declare void @runtime.printint16(i16)
+
+declare void @use(ptr)
+
+define void @runtime.initAll() unnamed_addr {
+entry:
+  call void @main.init()
+  ret void
+}
+
+define void @main() unnamed_addr {
+entry:
+  ; print(uintSliceSrc[0])
+  %uint8SliceSrc.buf = load ptr, ptr @main.uint8SliceSrc
+  %uint8SliceSrc.val = load i8, ptr %uint8SliceSrc.buf
+  call void @runtime.printuint8(i8 %uint8SliceSrc.val)
+
+  ; print(uintSliceDst[0])
+  %uint8SliceDst.buf = load ptr, ptr @main.uint8SliceDst
+  %uint8SliceDst.val = load i8, ptr %uint8SliceDst.buf
+  call void @runtime.printuint8(i8 %uint8SliceDst.val)
+
+  ; print(int16SliceSrc[0])
+  %int16SliceSrc.buf = load ptr, ptr @main.int16SliceSrc
+  %int16SliceSrc.val = load i16, ptr %int16SliceSrc.buf
+  call void @runtime.printint16(i16 %int16SliceSrc.val)
+
+  ; print(int16SliceDst[0])
+  %int16SliceDst.buf = load ptr, ptr @main.int16SliceDst
+  %int16SliceDst.val = load i16, ptr %int16SliceDst.buf
+  call void @runtime.printint16(i16 %int16SliceDst.val)
+
+  ; print(sliceDstUntaint[0])
+  %sliceDstUntaint.val = load i8, ptr getelementptr inbounds (i8, ptr @main.sliceDstUntaint.buf, i32 0)
+  call void @runtime.printuint8(i8 %sliceDstUntaint.val)
+
+  ; print(sliceDstTaint[0])
+  %sliceDstTaint.val = load i8, ptr getelementptr inbounds (i8, ptr @main.sliceDstTaint.buf, i32 0)
+  call void @runtime.printuint8(i8 %sliceDstTaint.val)
+
+  ret void
+}
+
+define internal void @main.init() unnamed_addr {
+entry:
+  ; equivalent of:
+  ;     uint8SliceDst = make([]uint8, len(uint8SliceSrc))
+  %uint8SliceSrc = load { ptr, i64, i64 }, ptr @main.uint8SliceSrc
+  %uint8SliceSrc.len = extractvalue { ptr, i64, i64 } %uint8SliceSrc, 1
+  %uint8SliceDst.buf = call ptr @runtime.alloc(i64 %uint8SliceSrc.len, ptr null)
+  %0 = insertvalue { ptr, i64, i64 } undef, ptr %uint8SliceDst.buf, 0
+  %1 = insertvalue { ptr, i64, i64 } %0, i64 %uint8SliceSrc.len, 1
+  %2 = insertvalue { ptr, i64, i64 } %1, i64 %uint8SliceSrc.len, 2
+  store { ptr, i64, i64 } %2, ptr @main.uint8SliceDst
+
+  ; equivalent of:
+  ;     copy(uint8SliceDst, uint8SliceSrc)
+  %uint8SliceSrc.buf = extractvalue { ptr, i64, i64 } %uint8SliceSrc, 0
+  %copy.n = call i64 @runtime.sliceCopy(ptr %uint8SliceDst.buf, ptr %uint8SliceSrc.buf, i64 %uint8SliceSrc.len, i64 %uint8SliceSrc.len, i64 1)
+
+  ; equivalent of:
+  ;     int16SliceDst = make([]int16, len(int16SliceSrc))
+  %int16SliceSrc = load { ptr, i64, i64 }, ptr @main.int16SliceSrc
+  %int16SliceSrc.len = extractvalue { ptr, i64, i64 } %int16SliceSrc, 1
+  %int16SliceSrc.len.bytes = mul i64 %int16SliceSrc.len, 2
+  %int16SliceDst.buf = call ptr @runtime.alloc(i64 %int16SliceSrc.len.bytes, ptr null)
+  %3 = insertvalue { ptr, i64, i64 } undef, ptr %int16SliceDst.buf, 0
+  %4 = insertvalue { ptr, i64, i64 } %3, i64 %int16SliceSrc.len, 1
+  %5 = insertvalue { ptr, i64, i64 } %4, i64 %int16SliceSrc.len, 2
+  store { ptr, i64, i64 } %5, ptr @main.int16SliceDst
+
+  ; equivalent of:
+  ;     copy(int16SliceDst, int16SliceSrc)
+  %int16SliceSrc.buf = extractvalue { ptr, i64, i64 } %int16SliceSrc, 0
+  %copy.n2 = call i64 @runtime.sliceCopy(ptr %int16SliceDst.buf, ptr %int16SliceSrc.buf, i64 %int16SliceSrc.len, i64 %int16SliceSrc.len, i64 2)
+
+  ; Copy slice that has a known value.
+  %copy.n3 = call i64 @runtime.sliceCopy(ptr @main.sliceDstUntaint.buf, ptr @main.sliceSrcUntaint.buf, i64 2, i64 2, i64 1)
+
+  ; Copy slice that might have been modified by the external @use call.
+  ; This is a fix for https://github.com/tinygo-org/tinygo/issues/3890.
+  call void @use(ptr @main.sliceSrcTaint.buf)
+  %copy.n4 = call i64 @runtime.sliceCopy(ptr @main.sliceDstTaint.buf, ptr @main.sliceSrcTaint.buf, i64 2, i64 2, i64 1)
+
+  ret void
+}