WIP stashed changes

For the threads scheduler, it makes sense to have NumCPU available.
For all other schedulers, the number of available CPUs is practically
limited to one by the scheduler (even though the system might have more
CPUs).

.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:
-    # This tests our lowest supported versions of Go and LLVM, to make sure at
-    # least the smoke tests still pass.
+  test-llvm15-go119:
     docker:
-      - image: golang:1.22-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:
-    # This tests the latest supported LLVM version when linking against system
-    # libraries.
+  test-llvm19-go123:
     docker:
-      - image: golang:1.25-bullseye
+      - image: golang:1.23-bullseye
     steps:
       - test-linux:
-          llvm: "20"
+          llvm: "19"
     resource_class: large
 
 workflows:
   test-all:
     jobs:
-      - test-oldest
-      # disable this test, since CircleCI seems unable to download due to rate-limits on Dockerhub.
-      # - test-newest
+      # This tests our lowest supported versions of Go and LLVM, to make sure at
+      # least the smoke tests still pass.
+      - test-llvm15-go119
+      # This tests LLVM 19 support when linking against system libraries.
+      - test-llvm19-go123

.github/workflows/build-macos.yml

@@ -30,22 +30,22 @@ jobs:
         run: |
           HOMEBREW_NO_AUTO_UPDATE=1 brew install qemu binaryen
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           submodules: true
       - name: Extract TinyGo version
         id: version
         run: ./.github/workflows/tinygo-extract-version.sh | tee -a "$GITHUB_OUTPUT"
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.25.1'
+          go-version: '1.23'
           cache: true
       - name: Restore LLVM source cache
         uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-20-${{ matrix.os }}-v1
+          key: llvm-source-19-${{ matrix.os }}-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -70,7 +70,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-20-${{ 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'
@@ -79,7 +79,7 @@ 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 '{}' \;
@@ -89,10 +89,19 @@ jobs:
         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
@@ -117,7 +126,7 @@ 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@master
@@ -130,19 +139,19 @@ jobs:
         run: |
           brew install llvm@${{ matrix.version }}
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
       - name: Install Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.25.1'
+          go-version: '1.23'
           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/linux.yml

@@ -18,7 +18,7 @@ jobs:
     # statically linked binary.
     runs-on: ubuntu-latest
     container:
-      image: golang:1.25-alpine
+      image: golang:1.23-alpine
     outputs:
       version: ${{ steps.version.outputs.version }}
     steps:
@@ -26,7 +26,7 @@ jobs:
         # tar: needed for actions/cache@v4
         # git+openssh: needed for checkout (I think?)
         # ruby: needed to install fpm
-        run: apk add tar git openssh make g++ ruby-dev mold
+        run: apk add tar git openssh make g++ ruby-dev
       - name: Work around CVE-2022-24765
         # We're not on a multi-user machine, so this is safe.
         run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
@@ -48,7 +48,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-20-linux-alpine-v1
+          key: llvm-source-19-linux-alpine-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -73,7 +73,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-20-linux-alpine-v1
+          key: llvm-build-19-linux-alpine-v1
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -104,6 +104,15 @@ jobs:
         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
@@ -137,12 +146,12 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.25.0'
+          go-version: '1.23'
           cache: true
       - name: Install wasmtime
         uses: bytecodealliance/actions/wasmtime/setup@v1
         with:
-          version: "29.0.1"
+          version: "19.0.1"
       - name: Install wasm-tools
         uses: bytecodealliance/actions/wasm-tools/setup@v1
       - name: Download release artifact
@@ -156,12 +165,11 @@ 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
     # potential bugs.
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -181,7 +189,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.25.0'
+          go-version: '1.23'
           cache: true
       - name: Install Node.js
         uses: actions/setup-node@v4
@@ -190,14 +198,14 @@ jobs:
       - name: Install wasmtime
         uses: bytecodealliance/actions/wasmtime/setup@v1
         with:
-          version: "29.0.1"
+          version: "19.0.1"
       - name: Setup `wasm-tools`
         uses: bytecodealliance/actions/wasm-tools/setup@v1
       - name: Restore LLVM source cache
         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
@@ -222,7 +230,7 @@ jobs:
         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'
@@ -249,6 +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
@@ -260,7 +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
@@ -280,7 +297,7 @@ jobs:
           - goarch: arm
             toolchain: arm-linux-gnueabihf
             libc: armhf
-    runs-on: ubuntu-22.04 # note: use the oldest image available! (see above)
+    runs-on: ubuntu-20.04
     needs: build-linux
     steps:
       - name: Checkout
@@ -298,13 +315,13 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.25.0'
+          go-version: '1.23'
           cache: true
       - name: Restore LLVM source cache
         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
@@ -329,7 +346,7 @@ jobs:
         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 }}-v2
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'

.github/workflows/llvm.yml

@@ -35,8 +35,8 @@ jobs:
         uses: docker/metadata-action@v5
         with:
           images: |
-            tinygo/llvm-20
-            ghcr.io/${{ github.repository_owner }}/llvm-20
+            tinygo/llvm-19
+            ghcr.io/${{ github.repository_owner }}/llvm-19
           tags: |
             type=sha,format=long
             type=raw,value=latest

.github/workflows/nix.yml

@@ -22,14 +22,14 @@ jobs:
         run: sudo apt-get remove llvm-18
       - name: Checkout
         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@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

.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 \
-    clang-20 \
-    libclang-20-dev \
-    lld-20
+    llvm-19-dev \
+    clang-19 \
+    libclang-19-dev \
+    lld-19

.github/workflows/sizediff.yml

@@ -30,7 +30,7 @@ jobs:
         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

.github/workflows/windows.yml

@@ -23,7 +23,7 @@ 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
@@ -41,13 +41,13 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.25.0'
+          go-version: '1.23'
           cache: true
       - name: Restore cached LLVM source
         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
@@ -72,7 +72,7 @@ jobs:
         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'
@@ -91,6 +91,15 @@ jobs:
         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-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:
@@ -100,12 +109,12 @@ jobs:
             C:/Users/runneradmin/go/pkg/mod
       - name: Install wasmtime
         run: |
-          scoop install wasmtime@29.0.1
+          scoop install wasmtime@14.0.4
       - 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
@@ -135,7 +144,7 @@ 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
@@ -147,7 +156,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.25.0'
+          go-version: '1.23'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v4
@@ -177,7 +186,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.25.0'
+          go-version: '1.23'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v4
@@ -201,19 +210,19 @@ 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 install binaryen && scoop install wasmtime@29.0.1
+          scoop install binaryen && scoop install wasmtime@14.0.4
       - name: Checkout
         uses: actions/checkout@v4
       - name: Install Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.25.0'
+          go-version: '1.23'
           cache: true
       - name: Download TinyGo build
         uses: actions/download-artifact@v4

.gitmodules

@@ -22,7 +22,7 @@
 	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 
-dynamic dependencies differs depending on your operating system.
-
-On Linux, use `ldd` (not to be confused with `lld`):
+Also, make sure the `tinygo` binary really is statically linked. Check this
+using `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

@@ -1,272 +1,3 @@
-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:1.25 AS tinygo-llvm
+FROM golang:1.23 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:1.25 AS tinygo-compiler
+FROM golang:1.23 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 $(shell command -v ccache 2> /dev/null),ON,OFF)'
-else
-    LLVM_OPTION += '-DLLVM_CCACHE_BUILD=$(CCACHE)'
+    # Use CCACHE for LLVM if possible
+    ifneq (, $(shell command -v ccache 2> /dev/null))
+        CCACHE := ON
+    else
+        CCACHE := OFF
+    endif
 endif
+LLVM_OPTION += '-DLLVM_CCACHE_BUILD=$(CCACHE)'
 
 # 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
-ifneq ($(RENESAS), 0)
-gen-device: gen-device-renesas
-endif
+gen-device: gen-device-avr gen-device-esp gen-device-nrf gen-device-sam gen-device-sifive gen-device-kendryte gen-device-nxp gen-device-rp gen-device-renesas ## Generate microcontroller-specific sources
 ifneq ($(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
 
 # Copy package cm into src/internal/cm
 .PHONY: wasi-cm
 wasi-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 -modfile ./internal/wasm-tools/go.mod -m -f {{.Dir}} $(WASM_TOOLS_MODULE)/cm)/ ./src/internal/cm
+	# rm -rf ./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.
-	@if ! command -v node 2>&1 >/dev/null; then echo "Install NodeJS version ${MIN_NODEJS_VERSION}+ to run tests."; exit 1; fi
-
-	@# Check whether the version is high enough.
-	@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
+ifeq (, $(shell which node))
+	@echo "Install NodeJS version 18+ to run tests."; exit 1;
+endif
+	@if [ $(NODEJS_VERSION) -lt $(MIN_NODEJS_VERSION) ]; then echo "Install NodeJS version 18+ 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
@@ -328,9 +309,11 @@ TEST_PACKAGES_FAST = \
 	container/heap \
 	container/list \
 	container/ring \
+	crypto/des \
 	crypto/ecdsa \
 	crypto/elliptic \
 	crypto/md5 \
+	crypto/rc4 \
 	crypto/sha1 \
 	crypto/sha256 \
 	crypto/sha512 \
@@ -372,11 +355,17 @@ TEST_PACKAGES_FAST = \
 	unique \
 	$(nil)
 
+# Assume this will go away before Go2, so only check minor version.
+ifeq ($(filter $(shell $(GO) env GOVERSION | cut -f 2 -d.), 16 17 18), )
+TEST_PACKAGES_FAST += crypto/internal/nistec/fiat
+else
+TEST_PACKAGES_FAST += crypto/elliptic/internal/fiat
+endif
+
 # archive/zip requires os.ReadAt, which is not yet supported on windows
 # bytes requires mmap
 # compress/flate appears to hang on wasi
 # crypto/aes fails on wasi, needs panic()/recover()
-# 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
 # image requires recover(), which is not yet supported on wasi
@@ -397,7 +386,6 @@ TEST_PACKAGES_LINUX := \
 	archive/zip \
 	compress/flate \
 	crypto/aes \
-	crypto/des \
 	crypto/hmac \
 	debug/dwarf \
 	debug/plan9obj \
@@ -417,48 +405,17 @@ TEST_PACKAGES_LINUX := \
 
 TEST_PACKAGES_DARWIN := $(TEST_PACKAGES_LINUX)
 
-# os/user requires t.Skip() support
 TEST_PACKAGES_WINDOWS := \
 	compress/flate \
-	crypto/des \
 	crypto/hmac \
+	os/user \
 	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 \
-	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
@@ -467,11 +424,11 @@ 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
@@ -480,15 +437,11 @@ TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_WINDOWS)
 TEST_IOFS := false
 endif
 
-TEST_SKIP_FLAG := -skip='TestExtraMethods|TestParseAndBytesRoundTrip/P256/Generic'
-
 # 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.
-	@# TestParseAndBytesRoundTrip/P256/Generic: relies on t.Skip() which is not implemented
-	$(TINYGO) test $(TEST_SKIP_FLAG) $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
+	$(TINYGO) test $(TEST_PACKAGES_HOST) $(TEST_PACKAGES_SLOW)
 	@# io/fs requires os.ReadDir, not yet supported on windows or wasi. It also
 	@# requires a large stack-size. Hence, io/fs is only run conditionally.
 	@# For more details, see the comments on issue #3143.
@@ -496,26 +449,24 @@ ifeq ($(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) \
@@ -539,19 +490,18 @@ 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:
@@ -573,8 +523,6 @@ smoketest: testchdir
 	# regression test for #2563
 	cd tests/os/smoke && $(TINYGO) test -c -target=pybadge && rm smoke.test
 	# test all examples (except pwm)
-	$(TINYGO) build -size short -o test.hex -target=pga2350             examples/echo
-	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/blinky1
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=pca10040            examples/adc
@@ -623,23 +571,21 @@ smoketest: testchdir
 	@$(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              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 $(TINYGO) build -size short -o test.wasm -tags=gopher_badge         examples/blinky1
-	@$(MD5SUM) test.wasm
-	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=pico                 examples/blinky1
+	$(TINYGO) build -size short -o test.wasm -tags=gopher_badge         examples/blinky1
 	@$(MD5SUM) test.wasm
 endif
 	# test all targets/boards
@@ -653,12 +599,8 @@ 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
 	$(TINYGO) build -size short -o test.hex -target=reelboard           examples/blinky1
@@ -795,8 +737,6 @@ endif
 	@$(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
 	$(TINYGO) build -size short -o test.hex -target=thumby              examples/echo
@@ -805,10 +745,6 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=tiny2350            examples/blinky1
 	@$(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
 	# test pwm
@@ -825,10 +761,6 @@ 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 ($(STM32), 0)
@@ -868,8 +800,6 @@ ifneq ($(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
 endif
 	$(TINYGO) build -size short -o test.hex -target=atmega328pb         examples/blinkm
 	@$(MD5SUM) test.hex
@@ -937,10 +867,6 @@ endif
 	@$(MD5SUM) test.hex
 	$(TINYGO) build -size short -o test.hex -target=elecrow-rp2350      examples/blinky1
 	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=hw-651              examples/machinetest
-	@$(MD5SUM) test.hex
-	$(TINYGO) build -size short -o test.hex -target=hw-651-s110v8       examples/machinetest
-	@$(MD5SUM) test.hex
 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
@@ -973,17 +899,15 @@ 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
@@ -991,8 +915,7 @@ 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
+	@mkdir -p build/release/tinygo/lib/wasi-libc/libc-bottom-half/headers
 	@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/
@@ -1001,7 +924,6 @@ 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
@@ -1015,8 +937,6 @@ 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
@@ -1031,29 +951,19 @@ 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/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-crt/stdio/ucrt_*                build/release/tinygo/lib/mingw-w64/mingw-w64-crt/stdio
 	@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
@@ -1063,37 +973,15 @@ 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/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-bottom-half/headers/public           build/release/tinygo/lib/wasi-libc/libc-bottom-half/headers
 	@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/src/time               build/release/tinygo/lib/wasi-libc/libc-top-half/musl/src
-	@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-libc/libc-top-half/musl/include                build/release/tinygo/lib/wasi-libc/libc-top-half/musl
+	@cp -rp lib/wasi-libc/sysroot                                   build/release/tinygo/lib/wasi-libc/sysroot
 	@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
@@ -1120,7 +1008,6 @@ endif
 tools:
 	cd internal/tools && go generate -tags tools ./
 
-LINTDIRS=src/os/ src/reflect/
 .PHONY: lint
 lint: tools ## Lint source tree
 	revive -version
@@ -1128,10 +1015,7 @@ 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' ) \
-		| grep -v "should have comment or be unexported" \
-		| grep '.' \
-		| awk '{print}; END {exit NR>0}'
+	revive -config revive.toml compiler/... src/{os,reflect}/*.go | 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

@@ -1,7 +1,7 @@
-Copyright (c) 2018-2025 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 (c) 2009-2024 The Go Authors. All rights reserved.
+Copyright (c) 2009-2023 The Go Authors. All rights reserved.
 
 TinyGo includes portions of LLVM, which is under the Apache License v2.0 with
 LLVM Exceptions. See https://llvm.org/LICENSE.txt for license information.

README.md

@@ -48,22 +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
-```
-
-You can also use the same syntax as Go 1.24+:
-
-```shell
-GOARCH=wasip1 GOOS=wasm tinygo build -buildmode=c-shared -o add.wasm add.go
+tinygo build -o main.wasm -target=wasip1 main.go
 ```
 
 ## Installation

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

@@ -1,88 +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",
-
-			// 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",
-
-			// 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",
-			"finalize.c",
-			"headers.c",
-			"mach_dep.c",
-			"malloc.c",
-			"mark.c",
-			"mark_rts.c",
-			"misc.c",
-			"new_hblk.c",
-			"obj_map.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

@@ -14,6 +14,7 @@ import (
 	"fmt"
 	"go/types"
 	"hash/crc32"
+	"io/fs"
 	"math/bits"
 	"os"
 	"os/exec"
@@ -148,17 +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)
-		libcDependencies = append(libcDependencies, libcJob)
+		job := makeDarwinLibSystemJob(config, tmpdir)
+		libcDependencies = append(libcDependencies, job)
 	case "musl":
-		var unlock func()
-		libcJob, unlock, err := libMusl.load(config, tmpdir)
+		job, 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, libcJob)
+		libcDependencies = append(libcDependencies, dummyCompileJob(filepath.Join(filepath.Dir(job.result), "crt1.o")))
+		libcDependencies = append(libcDependencies, job)
 	case "picolibc":
 		libcJob, unlock, err := libPicolibc.load(config, tmpdir)
 		if err != nil {
@@ -167,12 +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)
-		if err != nil {
-			return BuildResult{}, err
+		path := filepath.Join(root, "lib/wasi-libc/sysroot/lib/wasm32-wasi/libc.a")
+		if _, err := os.Stat(path); errors.Is(err, fs.ErrNotExist) {
+			return BuildResult{}, errors.New("could not find wasi-libc, perhaps you need to run `make wasi-libc`?")
 		}
-		defer unlock()
-		libcDependencies = append(libcDependencies, libcJob)
+		libcDependencies = append(libcDependencies, dummyCompileJob(path))
 	case "wasmbuiltins":
 		libcJob, unlock, err := libWasmBuiltins.load(config, tmpdir)
 		if err != nil {
@@ -181,12 +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
@@ -214,7 +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(),
 	}
 
@@ -451,15 +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)
@@ -547,15 +538,6 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 				}
 			}
 
-			// 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")
@@ -608,7 +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
 			}
@@ -622,11 +604,6 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		},
 	}
 
-	// Create the output directory, if needed
-	if err := os.MkdirAll(filepath.Dir(outpath), 0777); err != nil {
-		return result, err
-	}
-
 	// Check whether we only need to create an object file.
 	// If so, we don't need to link anything and will be finished quickly.
 	outext := filepath.Ext(outpath)
@@ -690,16 +667,6 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		ldflags = append(ldflags, "--no-entry")
 	}
 
-	if config.Options.BuildMode == "wasi-legacy" {
-		if !strings.HasPrefix(config.Triple(), "wasm32-") {
-			return result, fmt.Errorf("buildmode wasi-legacy is only supported on wasm")
-		}
-
-		if config.Options.Scheduler != "none" {
-			return result, fmt.Errorf("buildmode wasi-legacy only supports scheduler=none")
-		}
-	}
-
 	// Add compiler-rt dependency if needed. Usually this is a simple load from
 	// a cache.
 	if config.Target.RTLib == "compiler-rt" {
@@ -711,16 +678,6 @@ 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.
@@ -1046,7 +1003,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		// 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
 		}
@@ -1173,7 +1130,7 @@ 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
@@ -1191,6 +1148,12 @@ 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)
@@ -1204,19 +1167,10 @@ 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 {
-	mod := ctx.NewModule("cmdline-globals")
-	targetData := machine.CreateTargetData()
-	defer targetData.Dispose()
-	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)
-
+// setGlobalValues sets the global values from the -ldflags="-X ..." compiler
+// option in the given module. An error may be returned if the global is not of
+// the expected type.
+func setGlobalValues(mod llvm.Module, globals map[string]map[string]string) error {
 	var pkgPaths []string
 	for pkgPath := range globals {
 		pkgPaths = append(pkgPaths, pkgPath)
@@ -1232,6 +1186,24 @@ 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)
@@ -1242,20 +1214,22 @@ 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)
-			initializer := llvm.ConstNamedStruct(stringType, []llvm.Value{
-				buf,
+			zero := llvm.ConstInt(mod.Context().Int32Type(), 0, false)
+			ptr := llvm.ConstGEP(bufInitializer.Type(), buf, []llvm.Value{zero, zero})
+			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.
-			global := llvm.AddGlobal(mod, stringType, globalName)
+			// Set the initializer. No initializer should be set at this point.
 			global.SetInitializer(initializer)
-			global.SetAlignment(targetData.PrefTypeAlignment(stringType))
 		}
 	}
-
-	return mod
+	return nil
 }
 
 // functionStackSizes keeps stack size information about a single function

builder/builder_test.go

@@ -67,9 +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.X86RelaxRelocations;
-  MCOptions.X86Sse2Avx = Opts.X86Sse2Avx;
+  MCOptions.X86RelaxRelocations = Opts.RelaxELFRelocations;
+  MCOptions.X86Sse2Avx = Opts.SSE2AVX;
   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;
@@ -113,13 +117,6 @@ struct AssemblerInvocation {
 
   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

@@ -26,7 +26,7 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 
 	// Version range supported by TinyGo.
 	const minorMin = 19
-	const minorMax = 25
+	const minorMax = 23
 
 	// Check that we support this Go toolchain version.
 	gorootMajor, gorootMinor, err := goenv.GetGorootVersion()
@@ -36,7 +36,7 @@ func NewConfig(options *compileopts.Options) (*compileopts.Config, error) {
 	if gorootMajor != 1 || gorootMinor < minorMin || gorootMinor > minorMax {
 		// Note: when this gets updated, also update the Go compatibility matrix:
 		// 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)
+		return nil, fmt.Errorf("requires go version 1.19 through 1.23, got go%d.%d", 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

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.
@@ -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

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
-		if strings.Split(target, "-")[0] == "i386" {
-			// Old 32-bit x86 systems use msvcrt.dll.
-			sources = []string{
-				"mingw-w64-crt/crt/pseudo-reloc.c",
-				"mingw-w64-crt/gdtoa/dmisc.c",
-				"mingw-w64-crt/gdtoa/gdtoa.c",
-				"mingw-w64-crt/gdtoa/gmisc.c",
-				"mingw-w64-crt/gdtoa/misc.c",
-				"mingw-w64-crt/math/x86/exp2.S",
-				"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",
-			}
+		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
-	if goarch == "386" {
-		libs = []string{
-			// x86 uses msvcrt.dll instead of UCRT for compatibility with old
-			// Windows versions.
-			"advapi32.def.in",
-			"kernel32.def.in",
-			"msvcrt.def.in",
-		}
-	} else {
-		// Use the modernized UCRT on new systems.
-		// Normally all the api-ms-win-crt-*.def files are all compiled to a
-		// single .lib file. But to simplify things, we're going to leave them
-		// as separate files.
-		libs = []string{
-			"advapi32.def.in",
-			"kernel32.def.in",
-			"api-ms-win-crt-conio-l1-1-0.def",
-			"api-ms-win-crt-convert-l1-1-0.def.in",
-			"api-ms-win-crt-environment-l1-1-0.def",
-			"api-ms-win-crt-filesystem-l1-1-0.def",
-			"api-ms-win-crt-heap-l1-1-0.def",
-			"api-ms-win-crt-locale-l1-1-0.def",
-			"api-ms-win-crt-math-l1-1-0.def.in",
-			"api-ms-win-crt-multibyte-l1-1-0.def",
-			"api-ms-win-crt-private-l1-1-0.def.in",
-			"api-ms-win-crt-process-l1-1-0.def",
-			"api-ms-win-crt-runtime-l1-1-0.def.in",
-			"api-ms-win-crt-stdio-l1-1-0.def",
-			"api-ms-win-crt-string-l1-1-0.def",
-			"api-ms-win-crt-time-l1-1-0.def",
-			"api-ms-win-crt-utility-l1-1-0.def",
-		}
-	}
-	for _, name := range libs {
+	// Normally all the api-ms-win-crt-*.def files are all compiled to a single
+	// .lib file. But to simplify things, we're going to leave them as separate
+	// files.
+	for _, name := range []string{
+		"kernel32.def.in",
+		"api-ms-win-crt-conio-l1-1-0.def",
+		"api-ms-win-crt-convert-l1-1-0.def.in",
+		"api-ms-win-crt-environment-l1-1-0.def",
+		"api-ms-win-crt-filesystem-l1-1-0.def",
+		"api-ms-win-crt-heap-l1-1-0.def",
+		"api-ms-win-crt-locale-l1-1-0.def",
+		"api-ms-win-crt-math-l1-1-0.def.in",
+		"api-ms-win-crt-multibyte-l1-1-0.def",
+		"api-ms-win-crt-private-l1-1-0.def.in",
+		"api-ms-win-crt-process-l1-1-0.def",
+		"api-ms-win-crt-runtime-l1-1-0.def.in",
+		"api-ms-win-crt-stdio-l1-1-0.def",
+		"api-ms-win-crt-string-l1-1-0.def",
+		"api-ms-win-crt-time-l1-1-0.def",
+		"api-ms-win-crt-utility-l1-1-0.def",
+	} {
 		outpath := filepath.Join(tmpdir, filepath.Base(name)+".lib")
 		inpath := filepath.Join(root, "lib/mingw-w64/mingw-w64-crt/lib-common/"+name)
 		job := &compileJob{
@@ -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 +110,30 @@ 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

@@ -490,9 +490,9 @@ 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" || section.Name == ".stack1" {
 					// TinyGo emits stack sections on microcontroller using the
-					// ".stack" name.
+					// ".stack" (or ".stack1") name.
 					// This is a bit ugly, but I don't think there is a way to
 					// mark the stack section in a linker script.
 					sections = append(sections, memorySection{

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", 3884, 280, 0, 2268},
-		{"microbit", "examples/serial", 2924, 388, 8, 2272},
-		{"wioterminal", "examples/pininterrupt", 7365, 1491, 116, 6912},
+		{"hifive1b", "examples/echo", 4560, 280, 0, 2268},
+		{"microbit", "examples/serial", 2908, 388, 8, 2272},
+		{"wioterminal", "examples/pininterrupt", 7293, 1487, 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/cgo.go

@@ -92,18 +92,18 @@ type noescapingFunc struct {
 // cgoAliases list type aliases between Go and C, for types that are equivalent
 // in both languages. See addTypeAliases.
 var cgoAliases = map[string]string{
-	"_Cgo_int8_t":    "int8",
-	"_Cgo_int16_t":   "int16",
-	"_Cgo_int32_t":   "int32",
-	"_Cgo_int64_t":   "int64",
-	"_Cgo_uint8_t":   "uint8",
-	"_Cgo_uint16_t":  "uint16",
-	"_Cgo_uint32_t":  "uint32",
-	"_Cgo_uint64_t":  "uint64",
-	"_Cgo_uintptr_t": "uintptr",
-	"_Cgo_float":     "float32",
-	"_Cgo_double":    "float64",
-	"_Cgo__Bool":     "bool",
+	"C.int8_t":    "int8",
+	"C.int16_t":   "int16",
+	"C.int32_t":   "int32",
+	"C.int64_t":   "int64",
+	"C.uint8_t":   "uint8",
+	"C.uint16_t":  "uint16",
+	"C.uint32_t":  "uint32",
+	"C.uint64_t":  "uint64",
+	"C.uintptr_t": "uintptr",
+	"C.float":     "float32",
+	"C.double":    "float64",
+	"C._Bool":     "bool",
 }
 
 // builtinAliases are handled specially because they only exist on the Go side
@@ -145,46 +145,48 @@ typedef unsigned long long  _Cgo_ulonglong;
 // The string/bytes functions below implement C.CString etc. To make sure the
 // runtime doesn't need to know the C int type, lengths are converted to uintptr
 // first.
+// These functions will be modified to get a "C." prefix, so the source below
+// doesn't reflect the final AST.
 const generatedGoFilePrefixBase = `
 import "syscall"
 import "unsafe"
 
 var _ unsafe.Pointer
 
-//go:linkname _Cgo_CString runtime.cgo_CString
-func _Cgo_CString(string) *_Cgo_char
+//go:linkname C.CString runtime.cgo_CString
+func CString(string) *C.char
 
-//go:linkname _Cgo_GoString runtime.cgo_GoString
-func _Cgo_GoString(*_Cgo_char) string
+//go:linkname C.GoString runtime.cgo_GoString
+func GoString(*C.char) string
 
-//go:linkname _Cgo___GoStringN runtime.cgo_GoStringN
-func _Cgo___GoStringN(*_Cgo_char, uintptr) string
+//go:linkname C.__GoStringN runtime.cgo_GoStringN
+func __GoStringN(*C.char, uintptr) string
 
-func _Cgo_GoStringN(cstr *_Cgo_char, length _Cgo_int) string {
-	return _Cgo___GoStringN(cstr, uintptr(length))
+func GoStringN(cstr *C.char, length C.int) string {
+	return C.__GoStringN(cstr, uintptr(length))
 }
 
-//go:linkname _Cgo___GoBytes runtime.cgo_GoBytes
-func _Cgo___GoBytes(unsafe.Pointer, uintptr) []byte
+//go:linkname C.__GoBytes runtime.cgo_GoBytes
+func __GoBytes(unsafe.Pointer, uintptr) []byte
 
-func _Cgo_GoBytes(ptr unsafe.Pointer, length _Cgo_int) []byte {
-	return _Cgo___GoBytes(ptr, uintptr(length))
+func GoBytes(ptr unsafe.Pointer, length C.int) []byte {
+	return C.__GoBytes(ptr, uintptr(length))
 }
 
-//go:linkname _Cgo___CBytes runtime.cgo_CBytes
-func _Cgo___CBytes([]byte) unsafe.Pointer
+//go:linkname C.__CBytes runtime.cgo_CBytes
+func __CBytes([]byte) unsafe.Pointer
 
-func _Cgo_CBytes(b []byte) unsafe.Pointer {
-	return _Cgo___CBytes(b)
+func CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
 }
 
-//go:linkname _Cgo___get_errno_num runtime.cgo_errno
-func _Cgo___get_errno_num() uintptr
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func __get_errno_num() uintptr
 `
 
 const generatedGoFilePrefixOther = generatedGoFilePrefixBase + `
-func _Cgo___get_errno() error {
-	return syscall.Errno(_Cgo___get_errno_num())
+func __get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
 }
 `
 
@@ -195,7 +197,7 @@ func _Cgo___get_errno() error {
 // map the errno values to match the values in the syscall package.
 // Source of the errno values: lib/mingw-w64/mingw-w64-headers/crt/errno.h
 const generatedGoFilePrefixWindows = generatedGoFilePrefixBase + `
-var _Cgo___errno_mapping = [...]syscall.Errno{
+var __errno_mapping = [...]syscall.Errno{
 	1:  syscall.EPERM,
 	2:  syscall.ENOENT,
 	3:  syscall.ESRCH,
@@ -236,10 +238,10 @@ var _Cgo___errno_mapping = [...]syscall.Errno{
 	42: syscall.EILSEQ,
 }
 
-func _Cgo___get_errno() error {
-	num := _Cgo___get_errno_num()
-	if num < uintptr(len(_Cgo___errno_mapping)) {
-		if mapped := _Cgo___errno_mapping[num]; mapped != 0 {
+func __get_errno() error {
+	num := C.__get_errno_num()
+	if num < uintptr(len(__errno_mapping)) {
+		if mapped := __errno_mapping[num]; mapped != 0 {
 			return mapped
 		}
 	}
@@ -302,6 +304,23 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 	// If the Comments field is not set to nil, the go/format package will get
 	// confused about where comments should go.
 	p.generated.Comments = nil
+	// Adjust some of the functions in there.
+	for _, decl := range p.generated.Decls {
+		switch decl := decl.(type) {
+		case *ast.FuncDecl:
+			switch decl.Name.Name {
+			case "CString", "GoString", "GoStringN", "__GoStringN", "GoBytes", "__GoBytes", "CBytes", "__CBytes", "__get_errno_num", "__get_errno", "__errno_mapping":
+				// Adjust the name to have a "C." prefix so it is correctly
+				// resolved.
+				decl.Name.Name = "C." + decl.Name.Name
+			}
+		}
+	}
+	// Patch some types, for example *C.char in C.CString.
+	cf := p.newCGoFile(nil, -1) // dummy *cgoFile for the walker
+	astutil.Apply(p.generated, func(cursor *astutil.Cursor) bool {
+		return cf.walker(cursor, nil)
+	}, nil)
 
 	// Find `import "C"` C fragments in the file.
 	p.cgoHeaders = make([]string, len(files)) // combined CGo header fragment for each file
@@ -380,7 +399,7 @@ func Process(files []*ast.File, dir, importPath string, fset *token.FileSet, cfl
 			Tok:    token.TYPE,
 		}
 		for _, name := range builtinAliases {
-			typeSpec := p.getIntegerType("_Cgo_"+name, names["_Cgo_"+name])
+			typeSpec := p.getIntegerType("C."+name, names["_Cgo_"+name])
 			gen.Specs = append(gen.Specs, typeSpec)
 		}
 		p.generated.Decls = append(p.generated.Decls, gen)
@@ -1253,7 +1272,7 @@ func (p *cgoPackage) getUnnamedDeclName(prefix string, itf interface{}) string {
 func (f *cgoFile) getASTDeclName(name string, found clangCursor, iscall bool) string {
 	// Some types are defined in stdint.h and map directly to a particular Go
 	// type.
-	if alias := cgoAliases["_Cgo_"+name]; alias != "" {
+	if alias := cgoAliases["C."+name]; alias != "" {
 		return alias
 	}
 	node := f.getASTDeclNode(name, found)
@@ -1263,7 +1282,7 @@ func (f *cgoFile) getASTDeclName(name string, found clangCursor, iscall bool) st
 		}
 		return node.Name.Name
 	}
-	return "_Cgo_" + name
+	return "C." + name
 }
 
 // getASTDeclNode will declare the given C AST node (if not already defined) and
@@ -1363,8 +1382,8 @@ extern __typeof(%s) %s __attribute__((alias(%#v)));
 	case *elaboratedTypeInfo:
 		// Add struct bitfields.
 		for _, bitfield := range elaboratedType.bitfields {
-			f.createBitfieldGetter(bitfield, "_Cgo_"+name)
-			f.createBitfieldSetter(bitfield, "_Cgo_"+name)
+			f.createBitfieldGetter(bitfield, "C."+name)
+			f.createBitfieldSetter(bitfield, "C."+name)
 		}
 		if elaboratedType.unionSize != 0 {
 			// Create union getters/setters.
@@ -1373,7 +1392,7 @@ extern __typeof(%s) %s __attribute__((alias(%#v)));
 					f.addError(elaboratedType.pos, fmt.Sprintf("union must have field with a single name, it has %d names", len(field.Names)))
 					continue
 				}
-				f.createUnionAccessor(field, "_Cgo_"+name)
+				f.createUnionAccessor(field, "C."+name)
 			}
 		}
 	}
@@ -1422,7 +1441,7 @@ func (f *cgoFile) walker(cursor *astutil.Cursor, names map[string]clangCursor) b
 			node.Rhs = append(node.Rhs, &ast.CallExpr{
 				Fun: &ast.Ident{
 					NamePos: node.Lhs[1].End(),
-					Name:    "_Cgo___get_errno",
+					Name:    "C.__get_errno",
 				},
 			})
 		}
@@ -1447,7 +1466,7 @@ func (f *cgoFile) walker(cursor *astutil.Cursor, names map[string]clangCursor) b
 			return true
 		}
 		if x.Name == "C" {
-			name := "_Cgo_" + node.Sel.Name
+			name := "C." + node.Sel.Name
 			if found, ok := names[node.Sel.Name]; ok {
 				name = f.getASTDeclName(node.Sel.Name, found, false)
 			}

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
@@ -219,7 +219,7 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 		numArgs := int(C.tinygo_clang_Cursor_getNumArguments(c))
 		obj := &ast.Object{
 			Kind: ast.Fun,
-			Name: "_Cgo_" + name,
+			Name: "C." + name,
 		}
 		exportName := name
 		localName := name
@@ -257,7 +257,7 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 			},
 			Name: &ast.Ident{
 				NamePos: pos,
-				Name:    "_Cgo_" + localName,
+				Name:    "C." + localName,
 				Obj:     obj,
 			},
 			Type: &ast.FuncType{
@@ -319,7 +319,7 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 		return decl, stringSignature
 	case C.CXCursor_StructDecl, C.CXCursor_UnionDecl:
 		typ := f.makeASTRecordType(c, pos)
-		typeName := "_Cgo_" + name
+		typeName := "C." + name
 		typeExpr := typ.typeExpr
 		if typ.unionSize != 0 {
 			// Convert to a single-field struct type.
@@ -340,7 +340,7 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 		obj.Decl = typeSpec
 		return typeSpec, typ
 	case C.CXCursor_TypedefDecl:
-		typeName := "_Cgo_" + name
+		typeName := "C." + name
 		underlyingType := C.tinygo_clang_getTypedefDeclUnderlyingType(c)
 		obj := &ast.Object{
 			Kind: ast.Typ,
@@ -378,12 +378,12 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 		}
 		obj := &ast.Object{
 			Kind: ast.Var,
-			Name: "_Cgo_" + name,
+			Name: "C." + name,
 		}
 		valueSpec := &ast.ValueSpec{
 			Names: []*ast.Ident{{
 				NamePos: pos,
-				Name:    "_Cgo_" + name,
+				Name:    "C." + name,
 				Obj:     obj,
 			}},
 			Type: typeExpr,
@@ -407,12 +407,12 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 		}
 		obj := &ast.Object{
 			Kind: ast.Con,
-			Name: "_Cgo_" + name,
+			Name: "C." + name,
 		}
 		valueSpec := &ast.ValueSpec{
 			Names: []*ast.Ident{{
 				NamePos: pos,
-				Name:    "_Cgo_" + name,
+				Name:    "C." + name,
 				Obj:     obj,
 			}},
 			Values: []ast.Expr{expr},
@@ -423,7 +423,7 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 	case C.CXCursor_EnumDecl:
 		obj := &ast.Object{
 			Kind: ast.Typ,
-			Name: "_Cgo_" + name,
+			Name: "C." + name,
 		}
 		underlying := C.tinygo_clang_getEnumDeclIntegerType(c)
 		// TODO: gc's CGo implementation uses types such as `uint32` for enums
@@ -431,7 +431,7 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 		typeSpec := &ast.TypeSpec{
 			Name: &ast.Ident{
 				NamePos: pos,
-				Name:    "_Cgo_" + name,
+				Name:    "C." + name,
 				Obj:     obj,
 			},
 			Assign: pos,
@@ -454,12 +454,12 @@ func (f *cgoFile) createASTNode(name string, c clangCursor) (ast.Node, any) {
 		}
 		obj := &ast.Object{
 			Kind: ast.Con,
-			Name: "_Cgo_" + name,
+			Name: "C." + name,
 		}
 		valueSpec := &ast.ValueSpec{
 			Names: []*ast.Ident{{
 				NamePos: pos,
-				Name:    "_Cgo_" + name,
+				Name:    "C." + name,
 				Obj:     obj,
 			}},
 			Values: []ast.Expr{expr},
@@ -745,27 +745,27 @@ func (f *cgoFile) makeASTType(typ C.CXType, pos token.Pos) ast.Expr {
 	var typeName string
 	switch typ.kind {
 	case C.CXType_Char_S, C.CXType_Char_U:
-		typeName = "_Cgo_char"
+		typeName = "C.char"
 	case C.CXType_SChar:
-		typeName = "_Cgo_schar"
+		typeName = "C.schar"
 	case C.CXType_UChar:
-		typeName = "_Cgo_uchar"
+		typeName = "C.uchar"
 	case C.CXType_Short:
-		typeName = "_Cgo_short"
+		typeName = "C.short"
 	case C.CXType_UShort:
-		typeName = "_Cgo_ushort"
+		typeName = "C.ushort"
 	case C.CXType_Int:
-		typeName = "_Cgo_int"
+		typeName = "C.int"
 	case C.CXType_UInt:
-		typeName = "_Cgo_uint"
+		typeName = "C.uint"
 	case C.CXType_Long:
-		typeName = "_Cgo_long"
+		typeName = "C.long"
 	case C.CXType_ULong:
-		typeName = "_Cgo_ulong"
+		typeName = "C.ulong"
 	case C.CXType_LongLong:
-		typeName = "_Cgo_longlong"
+		typeName = "C.longlong"
 	case C.CXType_ULongLong:
-		typeName = "_Cgo_ulonglong"
+		typeName = "C.ulonglong"
 	case C.CXType_Bool:
 		typeName = "bool"
 	case C.CXType_Float, C.CXType_Double, C.CXType_LongDouble:
@@ -896,7 +896,7 @@ func (f *cgoFile) makeASTType(typ C.CXType, pos token.Pos) ast.Expr {
 		typeSpelling := getString(C.clang_getTypeSpelling(typ))
 		typeKindSpelling := getString(C.clang_getTypeKindSpelling(typ.kind))
 		f.addError(pos, fmt.Sprintf("unknown C type: %v (libclang type kind %s)", typeSpelling, typeKindSpelling))
-		typeName = "_Cgo_<unknown>"
+		typeName = "C.<unknown>"
 	}
 	return &ast.Ident{
 		NamePos: pos,
@@ -913,7 +913,7 @@ func (p *cgoPackage) getIntegerType(name string, cursor clangCursor) *ast.TypeSp
 	var goName string
 	typeSize := C.clang_Type_getSizeOf(underlyingType)
 	switch name {
-	case "_Cgo_char":
+	case "C.char":
 		if typeSize != 1 {
 			// This happens for some very special purpose architectures
 			// (DSPs etc.) that are not currently targeted.
@@ -926,7 +926,7 @@ func (p *cgoPackage) getIntegerType(name string, cursor clangCursor) *ast.TypeSp
 		case C.CXType_Char_U:
 			goName = "uint8"
 		}
-	case "_Cgo_schar", "_Cgo_short", "_Cgo_int", "_Cgo_long", "_Cgo_longlong":
+	case "C.schar", "C.short", "C.int", "C.long", "C.longlong":
 		switch typeSize {
 		case 1:
 			goName = "int8"
@@ -937,7 +937,7 @@ func (p *cgoPackage) getIntegerType(name string, cursor clangCursor) *ast.TypeSp
 		case 8:
 			goName = "int64"
 		}
-	case "_Cgo_uchar", "_Cgo_ushort", "_Cgo_uint", "_Cgo_ulong", "_Cgo_ulonglong":
+	case "C.uchar", "C.ushort", "C.uint", "C.ulong", "C.ulonglong":
 		switch typeSize {
 		case 1:
 			goName = "uint8"

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/testdata/basic.out.go

@@ -5,50 +5,50 @@ import "unsafe"
 
 var _ unsafe.Pointer
 
-//go:linkname _Cgo_CString runtime.cgo_CString
-func _Cgo_CString(string) *_Cgo_char
+//go:linkname C.CString runtime.cgo_CString
+func C.CString(string) *C.char
 
-//go:linkname _Cgo_GoString runtime.cgo_GoString
-func _Cgo_GoString(*_Cgo_char) string
+//go:linkname C.GoString runtime.cgo_GoString
+func C.GoString(*C.char) string
 
-//go:linkname _Cgo___GoStringN runtime.cgo_GoStringN
-func _Cgo___GoStringN(*_Cgo_char, uintptr) string
+//go:linkname C.__GoStringN runtime.cgo_GoStringN
+func C.__GoStringN(*C.char, uintptr) string
 
-func _Cgo_GoStringN(cstr *_Cgo_char, length _Cgo_int) string {
-	return _Cgo___GoStringN(cstr, uintptr(length))
+func C.GoStringN(cstr *C.char, length C.int) string {
+	return C.__GoStringN(cstr, uintptr(length))
 }
 
-//go:linkname _Cgo___GoBytes runtime.cgo_GoBytes
-func _Cgo___GoBytes(unsafe.Pointer, uintptr) []byte
+//go:linkname C.__GoBytes runtime.cgo_GoBytes
+func C.__GoBytes(unsafe.Pointer, uintptr) []byte
 
-func _Cgo_GoBytes(ptr unsafe.Pointer, length _Cgo_int) []byte {
-	return _Cgo___GoBytes(ptr, uintptr(length))
+func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
+	return C.__GoBytes(ptr, uintptr(length))
 }
 
-//go:linkname _Cgo___CBytes runtime.cgo_CBytes
-func _Cgo___CBytes([]byte) unsafe.Pointer
+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
 
-func _Cgo_CBytes(b []byte) unsafe.Pointer {
-	return _Cgo___CBytes(b)
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
 }
 
-//go:linkname _Cgo___get_errno_num runtime.cgo_errno
-func _Cgo___get_errno_num() uintptr
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
 
-func _Cgo___get_errno() error {
-	return syscall.Errno(_Cgo___get_errno_num())
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
 }
 
 type (
-	_Cgo_char      uint8
-	_Cgo_schar     int8
-	_Cgo_uchar     uint8
-	_Cgo_short     int16
-	_Cgo_ushort    uint16
-	_Cgo_int       int32
-	_Cgo_uint      uint32
-	_Cgo_long      int32
-	_Cgo_ulong     uint32
-	_Cgo_longlong  int64
-	_Cgo_ulonglong uint64
+	C.char      uint8
+	C.schar     int8
+	C.uchar     uint8
+	C.short     int16
+	C.ushort    uint16
+	C.int       int32
+	C.uint      uint32
+	C.long      int32
+	C.ulong     uint32
+	C.longlong  int64
+	C.ulonglong uint64
 )

cgo/testdata/const.out.go

@@ -5,58 +5,58 @@ import "unsafe"
 
 var _ unsafe.Pointer
 
-//go:linkname _Cgo_CString runtime.cgo_CString
-func _Cgo_CString(string) *_Cgo_char
+//go:linkname C.CString runtime.cgo_CString
+func C.CString(string) *C.char
 
-//go:linkname _Cgo_GoString runtime.cgo_GoString
-func _Cgo_GoString(*_Cgo_char) string
+//go:linkname C.GoString runtime.cgo_GoString
+func C.GoString(*C.char) string
 
-//go:linkname _Cgo___GoStringN runtime.cgo_GoStringN
-func _Cgo___GoStringN(*_Cgo_char, uintptr) string
+//go:linkname C.__GoStringN runtime.cgo_GoStringN
+func C.__GoStringN(*C.char, uintptr) string
 
-func _Cgo_GoStringN(cstr *_Cgo_char, length _Cgo_int) string {
-	return _Cgo___GoStringN(cstr, uintptr(length))
+func C.GoStringN(cstr *C.char, length C.int) string {
+	return C.__GoStringN(cstr, uintptr(length))
 }
 
-//go:linkname _Cgo___GoBytes runtime.cgo_GoBytes
-func _Cgo___GoBytes(unsafe.Pointer, uintptr) []byte
+//go:linkname C.__GoBytes runtime.cgo_GoBytes
+func C.__GoBytes(unsafe.Pointer, uintptr) []byte
 
-func _Cgo_GoBytes(ptr unsafe.Pointer, length _Cgo_int) []byte {
-	return _Cgo___GoBytes(ptr, uintptr(length))
+func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
+	return C.__GoBytes(ptr, uintptr(length))
 }
 
-//go:linkname _Cgo___CBytes runtime.cgo_CBytes
-func _Cgo___CBytes([]byte) unsafe.Pointer
+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
 
-func _Cgo_CBytes(b []byte) unsafe.Pointer {
-	return _Cgo___CBytes(b)
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
 }
 
-//go:linkname _Cgo___get_errno_num runtime.cgo_errno
-func _Cgo___get_errno_num() uintptr
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
 
-func _Cgo___get_errno() error {
-	return syscall.Errno(_Cgo___get_errno_num())
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
 }
 
 type (
-	_Cgo_char      uint8
-	_Cgo_schar     int8
-	_Cgo_uchar     uint8
-	_Cgo_short     int16
-	_Cgo_ushort    uint16
-	_Cgo_int       int32
-	_Cgo_uint      uint32
-	_Cgo_long      int32
-	_Cgo_ulong     uint32
-	_Cgo_longlong  int64
-	_Cgo_ulonglong uint64
+	C.char      uint8
+	C.schar     int8
+	C.uchar     uint8
+	C.short     int16
+	C.ushort    uint16
+	C.int       int32
+	C.uint      uint32
+	C.long      int32
+	C.ulong     uint32
+	C.longlong  int64
+	C.ulonglong uint64
 )
 
-const _Cgo_foo = 3
-const _Cgo_bar = _Cgo_foo
-const _Cgo_unreferenced = 4
-const _Cgo_referenced = _Cgo_unreferenced
-const _Cgo_fnlike_val = 5
-const _Cgo_square_val = (20 * 20)
-const _Cgo_add_val = (3 + 5)
+const C.foo = 3
+const C.bar = C.foo
+const C.unreferenced = 4
+const C.referenced = C.unreferenced
+const C.fnlike_val = 5
+const C.square_val = (20 * 20)
+const C.add_val = (3 + 5)

cgo/testdata/errors.out.go

@@ -14,16 +14,16 @@
 //     testdata/errors.go:3:1: function "unusedFunction" in #cgo noescape line is not used
 
 // Type checking errors after CGo processing:
-//     testdata/errors.go:102: cannot use 2 << 10 (untyped int constant 2048) as _Cgo_char value in variable declaration (overflows)
+//     testdata/errors.go:102: cannot use 2 << 10 (untyped int constant 2048) as C.char value in variable declaration (overflows)
 //     testdata/errors.go:105: unknown field z in struct literal
-//     testdata/errors.go:108: undefined: _Cgo_SOME_CONST_1
-//     testdata/errors.go:110: cannot use _Cgo_SOME_CONST_3 (untyped int constant 1234) as byte value in variable declaration (overflows)
-//     testdata/errors.go:112: undefined: _Cgo_SOME_CONST_4
-//     testdata/errors.go:114: undefined: _Cgo_SOME_CONST_b
-//     testdata/errors.go:116: undefined: _Cgo_SOME_CONST_startspace
-//     testdata/errors.go:119: undefined: _Cgo_SOME_PARAM_CONST_invalid
-//     testdata/errors.go:122: undefined: _Cgo_add_toomuch
-//     testdata/errors.go:123: undefined: _Cgo_add_toolittle
+//     testdata/errors.go:108: undefined: C.SOME_CONST_1
+//     testdata/errors.go:110: cannot use C.SOME_CONST_3 (untyped int constant 1234) as byte value in variable declaration (overflows)
+//     testdata/errors.go:112: undefined: C.SOME_CONST_4
+//     testdata/errors.go:114: undefined: C.SOME_CONST_b
+//     testdata/errors.go:116: undefined: C.SOME_CONST_startspace
+//     testdata/errors.go:119: undefined: C.SOME_PARAM_CONST_invalid
+//     testdata/errors.go:122: undefined: C.add_toomuch
+//     testdata/errors.go:123: undefined: C.add_toolittle
 
 package main
 
@@ -32,58 +32,58 @@ import "unsafe"
 
 var _ unsafe.Pointer
 
-//go:linkname _Cgo_CString runtime.cgo_CString
-func _Cgo_CString(string) *_Cgo_char
+//go:linkname C.CString runtime.cgo_CString
+func C.CString(string) *C.char
 
-//go:linkname _Cgo_GoString runtime.cgo_GoString
-func _Cgo_GoString(*_Cgo_char) string
+//go:linkname C.GoString runtime.cgo_GoString
+func C.GoString(*C.char) string
 
-//go:linkname _Cgo___GoStringN runtime.cgo_GoStringN
-func _Cgo___GoStringN(*_Cgo_char, uintptr) string
+//go:linkname C.__GoStringN runtime.cgo_GoStringN
+func C.__GoStringN(*C.char, uintptr) string
 
-func _Cgo_GoStringN(cstr *_Cgo_char, length _Cgo_int) string {
-	return _Cgo___GoStringN(cstr, uintptr(length))
+func C.GoStringN(cstr *C.char, length C.int) string {
+	return C.__GoStringN(cstr, uintptr(length))
 }
 
-//go:linkname _Cgo___GoBytes runtime.cgo_GoBytes
-func _Cgo___GoBytes(unsafe.Pointer, uintptr) []byte
+//go:linkname C.__GoBytes runtime.cgo_GoBytes
+func C.__GoBytes(unsafe.Pointer, uintptr) []byte
 
-func _Cgo_GoBytes(ptr unsafe.Pointer, length _Cgo_int) []byte {
-	return _Cgo___GoBytes(ptr, uintptr(length))
+func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
+	return C.__GoBytes(ptr, uintptr(length))
 }
 
-//go:linkname _Cgo___CBytes runtime.cgo_CBytes
-func _Cgo___CBytes([]byte) unsafe.Pointer
+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
 
-func _Cgo_CBytes(b []byte) unsafe.Pointer {
-	return _Cgo___CBytes(b)
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
 }
 
-//go:linkname _Cgo___get_errno_num runtime.cgo_errno
-func _Cgo___get_errno_num() uintptr
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
 
-func _Cgo___get_errno() error {
-	return syscall.Errno(_Cgo___get_errno_num())
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
 }
 
 type (
-	_Cgo_char      uint8
-	_Cgo_schar     int8
-	_Cgo_uchar     uint8
-	_Cgo_short     int16
-	_Cgo_ushort    uint16
-	_Cgo_int       int32
-	_Cgo_uint      uint32
-	_Cgo_long      int32
-	_Cgo_ulong     uint32
-	_Cgo_longlong  int64
-	_Cgo_ulonglong uint64
+	C.char      uint8
+	C.schar     int8
+	C.uchar     uint8
+	C.short     int16
+	C.ushort    uint16
+	C.int       int32
+	C.uint      uint32
+	C.long      int32
+	C.ulong     uint32
+	C.longlong  int64
+	C.ulonglong uint64
 )
-type _Cgo_struct_point_t struct {
-	x _Cgo_int
-	y _Cgo_int
+type C.struct_point_t struct {
+	x C.int
+	y C.int
 }
-type _Cgo_point_t = _Cgo_struct_point_t
+type C.point_t = C.struct_point_t
 
-const _Cgo_SOME_CONST_3 = 1234
-const _Cgo_SOME_PARAM_CONST_valid = 3 + 4
+const C.SOME_CONST_3 = 1234
+const C.SOME_PARAM_CONST_valid = 3 + 4

cgo/testdata/flags.out.go

@@ -10,53 +10,53 @@ import "unsafe"
 
 var _ unsafe.Pointer
 
-//go:linkname _Cgo_CString runtime.cgo_CString
-func _Cgo_CString(string) *_Cgo_char
+//go:linkname C.CString runtime.cgo_CString
+func C.CString(string) *C.char
 
-//go:linkname _Cgo_GoString runtime.cgo_GoString
-func _Cgo_GoString(*_Cgo_char) string
+//go:linkname C.GoString runtime.cgo_GoString
+func C.GoString(*C.char) string
 
-//go:linkname _Cgo___GoStringN runtime.cgo_GoStringN
-func _Cgo___GoStringN(*_Cgo_char, uintptr) string
+//go:linkname C.__GoStringN runtime.cgo_GoStringN
+func C.__GoStringN(*C.char, uintptr) string
 
-func _Cgo_GoStringN(cstr *_Cgo_char, length _Cgo_int) string {
-	return _Cgo___GoStringN(cstr, uintptr(length))
+func C.GoStringN(cstr *C.char, length C.int) string {
+	return C.__GoStringN(cstr, uintptr(length))
 }
 
-//go:linkname _Cgo___GoBytes runtime.cgo_GoBytes
-func _Cgo___GoBytes(unsafe.Pointer, uintptr) []byte
+//go:linkname C.__GoBytes runtime.cgo_GoBytes
+func C.__GoBytes(unsafe.Pointer, uintptr) []byte
 
-func _Cgo_GoBytes(ptr unsafe.Pointer, length _Cgo_int) []byte {
-	return _Cgo___GoBytes(ptr, uintptr(length))
+func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
+	return C.__GoBytes(ptr, uintptr(length))
 }
 
-//go:linkname _Cgo___CBytes runtime.cgo_CBytes
-func _Cgo___CBytes([]byte) unsafe.Pointer
+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
 
-func _Cgo_CBytes(b []byte) unsafe.Pointer {
-	return _Cgo___CBytes(b)
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
 }
 
-//go:linkname _Cgo___get_errno_num runtime.cgo_errno
-func _Cgo___get_errno_num() uintptr
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
 
-func _Cgo___get_errno() error {
-	return syscall.Errno(_Cgo___get_errno_num())
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
 }
 
 type (
-	_Cgo_char      uint8
-	_Cgo_schar     int8
-	_Cgo_uchar     uint8
-	_Cgo_short     int16
-	_Cgo_ushort    uint16
-	_Cgo_int       int32
-	_Cgo_uint      uint32
-	_Cgo_long      int32
-	_Cgo_ulong     uint32
-	_Cgo_longlong  int64
-	_Cgo_ulonglong uint64
+	C.char      uint8
+	C.schar     int8
+	C.uchar     uint8
+	C.short     int16
+	C.ushort    uint16
+	C.int       int32
+	C.uint      uint32
+	C.long      int32
+	C.ulong     uint32
+	C.longlong  int64
+	C.ulonglong uint64
 )
 
-const _Cgo_BAR = 3
-const _Cgo_FOO_H = 1
+const C.BAR = 3
+const C.FOO_H = 1

cgo/testdata/symbols.out.go

@@ -5,80 +5,80 @@ import "unsafe"
 
 var _ unsafe.Pointer
 
-//go:linkname _Cgo_CString runtime.cgo_CString
-func _Cgo_CString(string) *_Cgo_char
+//go:linkname C.CString runtime.cgo_CString
+func C.CString(string) *C.char
 
-//go:linkname _Cgo_GoString runtime.cgo_GoString
-func _Cgo_GoString(*_Cgo_char) string
+//go:linkname C.GoString runtime.cgo_GoString
+func C.GoString(*C.char) string
 
-//go:linkname _Cgo___GoStringN runtime.cgo_GoStringN
-func _Cgo___GoStringN(*_Cgo_char, uintptr) string
+//go:linkname C.__GoStringN runtime.cgo_GoStringN
+func C.__GoStringN(*C.char, uintptr) string
 
-func _Cgo_GoStringN(cstr *_Cgo_char, length _Cgo_int) string {
-	return _Cgo___GoStringN(cstr, uintptr(length))
+func C.GoStringN(cstr *C.char, length C.int) string {
+	return C.__GoStringN(cstr, uintptr(length))
 }
 
-//go:linkname _Cgo___GoBytes runtime.cgo_GoBytes
-func _Cgo___GoBytes(unsafe.Pointer, uintptr) []byte
+//go:linkname C.__GoBytes runtime.cgo_GoBytes
+func C.__GoBytes(unsafe.Pointer, uintptr) []byte
 
-func _Cgo_GoBytes(ptr unsafe.Pointer, length _Cgo_int) []byte {
-	return _Cgo___GoBytes(ptr, uintptr(length))
+func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
+	return C.__GoBytes(ptr, uintptr(length))
 }
 
-//go:linkname _Cgo___CBytes runtime.cgo_CBytes
-func _Cgo___CBytes([]byte) unsafe.Pointer
+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
 
-func _Cgo_CBytes(b []byte) unsafe.Pointer {
-	return _Cgo___CBytes(b)
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
 }
 
-//go:linkname _Cgo___get_errno_num runtime.cgo_errno
-func _Cgo___get_errno_num() uintptr
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
 
-func _Cgo___get_errno() error {
-	return syscall.Errno(_Cgo___get_errno_num())
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
 }
 
 type (
-	_Cgo_char      uint8
-	_Cgo_schar     int8
-	_Cgo_uchar     uint8
-	_Cgo_short     int16
-	_Cgo_ushort    uint16
-	_Cgo_int       int32
-	_Cgo_uint      uint32
-	_Cgo_long      int32
-	_Cgo_ulong     uint32
-	_Cgo_longlong  int64
-	_Cgo_ulonglong uint64
+	C.char      uint8
+	C.schar     int8
+	C.uchar     uint8
+	C.short     int16
+	C.ushort    uint16
+	C.int       int32
+	C.uint      uint32
+	C.long      int32
+	C.ulong     uint32
+	C.longlong  int64
+	C.ulonglong uint64
 )
 
 //export foo
-func _Cgo_foo(a _Cgo_int, b _Cgo_int) _Cgo_int
+func C.foo(a C.int, b C.int) C.int
 
-var _Cgo_foo$funcaddr unsafe.Pointer
+var C.foo$funcaddr unsafe.Pointer
 
 //export variadic0
 //go:variadic
-func _Cgo_variadic0()
+func C.variadic0()
 
-var _Cgo_variadic0$funcaddr unsafe.Pointer
+var C.variadic0$funcaddr unsafe.Pointer
 
 //export variadic2
 //go:variadic
-func _Cgo_variadic2(x _Cgo_int, y _Cgo_int)
+func C.variadic2(x C.int, y C.int)
 
-var _Cgo_variadic2$funcaddr unsafe.Pointer
+var C.variadic2$funcaddr unsafe.Pointer
 
 //export _Cgo_static_173c95a79b6df1980521_staticfunc
-func _Cgo_staticfunc!symbols.go(x _Cgo_int)
+func C.staticfunc!symbols.go(x C.int)
 
-var _Cgo_staticfunc!symbols.go$funcaddr unsafe.Pointer
+var C.staticfunc!symbols.go$funcaddr unsafe.Pointer
 
 //export notEscapingFunction
 //go:noescape
-func _Cgo_notEscapingFunction(a *_Cgo_int)
+func C.notEscapingFunction(a *C.int)
 
-var _Cgo_notEscapingFunction$funcaddr unsafe.Pointer
+var C.notEscapingFunction$funcaddr unsafe.Pointer
 //go:extern someValue
-var _Cgo_someValue _Cgo_int
+var C.someValue C.int

cgo/testdata/types.out.go

@@ -5,162 +5,158 @@ import "unsafe"
 
 var _ unsafe.Pointer
 
-//go:linkname _Cgo_CString runtime.cgo_CString
-func _Cgo_CString(string) *_Cgo_char
+//go:linkname C.CString runtime.cgo_CString
+func C.CString(string) *C.char
 
-//go:linkname _Cgo_GoString runtime.cgo_GoString
-func _Cgo_GoString(*_Cgo_char) string
+//go:linkname C.GoString runtime.cgo_GoString
+func C.GoString(*C.char) string
 
-//go:linkname _Cgo___GoStringN runtime.cgo_GoStringN
-func _Cgo___GoStringN(*_Cgo_char, uintptr) string
+//go:linkname C.__GoStringN runtime.cgo_GoStringN
+func C.__GoStringN(*C.char, uintptr) string
 
-func _Cgo_GoStringN(cstr *_Cgo_char, length _Cgo_int) string {
-	return _Cgo___GoStringN(cstr, uintptr(length))
+func C.GoStringN(cstr *C.char, length C.int) string {
+	return C.__GoStringN(cstr, uintptr(length))
 }
 
-//go:linkname _Cgo___GoBytes runtime.cgo_GoBytes
-func _Cgo___GoBytes(unsafe.Pointer, uintptr) []byte
+//go:linkname C.__GoBytes runtime.cgo_GoBytes
+func C.__GoBytes(unsafe.Pointer, uintptr) []byte
 
-func _Cgo_GoBytes(ptr unsafe.Pointer, length _Cgo_int) []byte {
-	return _Cgo___GoBytes(ptr, uintptr(length))
+func C.GoBytes(ptr unsafe.Pointer, length C.int) []byte {
+	return C.__GoBytes(ptr, uintptr(length))
 }
 
-//go:linkname _Cgo___CBytes runtime.cgo_CBytes
-func _Cgo___CBytes([]byte) unsafe.Pointer
+//go:linkname C.__CBytes runtime.cgo_CBytes
+func C.__CBytes([]byte) unsafe.Pointer
 
-func _Cgo_CBytes(b []byte) unsafe.Pointer {
-	return _Cgo___CBytes(b)
+func C.CBytes(b []byte) unsafe.Pointer {
+	return C.__CBytes(b)
 }
 
-//go:linkname _Cgo___get_errno_num runtime.cgo_errno
-func _Cgo___get_errno_num() uintptr
+//go:linkname C.__get_errno_num runtime.cgo_errno
+func C.__get_errno_num() uintptr
 
-func _Cgo___get_errno() error {
-	return syscall.Errno(_Cgo___get_errno_num())
+func C.__get_errno() error {
+	return syscall.Errno(C.__get_errno_num())
 }
 
 type (
-	_Cgo_char      uint8
-	_Cgo_schar     int8
-	_Cgo_uchar     uint8
-	_Cgo_short     int16
-	_Cgo_ushort    uint16
-	_Cgo_int       int32
-	_Cgo_uint      uint32
-	_Cgo_long      int32
-	_Cgo_ulong     uint32
-	_Cgo_longlong  int64
-	_Cgo_ulonglong uint64
+	C.char      uint8
+	C.schar     int8
+	C.uchar     uint8
+	C.short     int16
+	C.ushort    uint16
+	C.int       int32
+	C.uint      uint32
+	C.long      int32
+	C.ulong     uint32
+	C.longlong  int64
+	C.ulonglong uint64
 )
-type _Cgo_myint = _Cgo_int
-type _Cgo_struct_point2d_t struct {
-	x _Cgo_int
-	y _Cgo_int
+type C.myint = C.int
+type C.struct_point2d_t struct {
+	x C.int
+	y C.int
 }
-type _Cgo_point2d_t = _Cgo_struct_point2d_t
-type _Cgo_struct_point3d struct {
-	x _Cgo_int
-	y _Cgo_int
-	z _Cgo_int
+type C.point2d_t = C.struct_point2d_t
+type C.struct_point3d struct {
+	x C.int
+	y C.int
+	z C.int
 }
-type _Cgo_point3d_t = _Cgo_struct_point3d
-type _Cgo_struct_type1 struct {
-	_type   _Cgo_int
-	__type  _Cgo_int
-	___type _Cgo_int
+type C.point3d_t = C.struct_point3d
+type C.struct_type1 struct {
+	_type   C.int
+	__type  C.int
+	___type C.int
 }
-type _Cgo_struct_type2 struct{ _type _Cgo_int }
-type _Cgo_union_union1_t struct{ i _Cgo_int }
-type _Cgo_union1_t = _Cgo_union_union1_t
-type _Cgo_union_union3_t struct{ $union uint64 }
+type C.struct_type2 struct{ _type C.int }
+type C.union_union1_t struct{ i C.int }
+type C.union1_t = C.union_union1_t
+type C.union_union3_t struct{ $union uint64 }
 
-func (union *_Cgo_union_union3_t) unionfield_i() *_Cgo_int {
-	return (*_Cgo_int)(unsafe.Pointer(&union.$union))
-}
-func (union *_Cgo_union_union3_t) unionfield_d() *float64 {
+func (union *C.union_union3_t) unionfield_i() *C.int { return (*C.int)(unsafe.Pointer(&union.$union)) }
+func (union *C.union_union3_t) unionfield_d() *float64 {
 	return (*float64)(unsafe.Pointer(&union.$union))
 }
-func (union *_Cgo_union_union3_t) unionfield_s() *_Cgo_short {
-	return (*_Cgo_short)(unsafe.Pointer(&union.$union))
+func (union *C.union_union3_t) unionfield_s() *C.short {
+	return (*C.short)(unsafe.Pointer(&union.$union))
 }
 
-type _Cgo_union3_t = _Cgo_union_union3_t
-type _Cgo_union_union2d struct{ $union [2]uint64 }
+type C.union3_t = C.union_union3_t
+type C.union_union2d struct{ $union [2]uint64 }
 
-func (union *_Cgo_union_union2d) unionfield_i() *_Cgo_int {
-	return (*_Cgo_int)(unsafe.Pointer(&union.$union))
-}
-func (union *_Cgo_union_union2d) unionfield_d() *[2]float64 {
+func (union *C.union_union2d) unionfield_i() *C.int { return (*C.int)(unsafe.Pointer(&union.$union)) }
+func (union *C.union_union2d) unionfield_d() *[2]float64 {
 	return (*[2]float64)(unsafe.Pointer(&union.$union))
 }
 
-type _Cgo_union2d_t = _Cgo_union_union2d
-type _Cgo_union_unionarray_t struct{ arr [10]_Cgo_uchar }
-type _Cgo_unionarray_t = _Cgo_union_unionarray_t
-type _Cgo__Ctype_union___0 struct{ $union [3]uint32 }
+type C.union2d_t = C.union_union2d
+type C.union_unionarray_t struct{ arr [10]C.uchar }
+type C.unionarray_t = C.union_unionarray_t
+type C._Ctype_union___0 struct{ $union [3]uint32 }
 
-func (union *_Cgo__Ctype_union___0) unionfield_area() *_Cgo_point2d_t {
-	return (*_Cgo_point2d_t)(unsafe.Pointer(&union.$union))
+func (union *C._Ctype_union___0) unionfield_area() *C.point2d_t {
+	return (*C.point2d_t)(unsafe.Pointer(&union.$union))
 }
-func (union *_Cgo__Ctype_union___0) unionfield_solid() *_Cgo_point3d_t {
-	return (*_Cgo_point3d_t)(unsafe.Pointer(&union.$union))
+func (union *C._Ctype_union___0) unionfield_solid() *C.point3d_t {
+	return (*C.point3d_t)(unsafe.Pointer(&union.$union))
 }
 
-type _Cgo_struct_struct_nested_t struct {
-	begin _Cgo_point2d_t
-	end   _Cgo_point2d_t
-	tag   _Cgo_int
+type C.struct_struct_nested_t struct {
+	begin C.point2d_t
+	end   C.point2d_t
+	tag   C.int
 
-	coord _Cgo__Ctype_union___0
+	coord C._Ctype_union___0
 }
-type _Cgo_struct_nested_t = _Cgo_struct_struct_nested_t
-type _Cgo_union_union_nested_t struct{ $union [2]uint64 }
+type C.struct_nested_t = C.struct_struct_nested_t
+type C.union_union_nested_t struct{ $union [2]uint64 }
 
-func (union *_Cgo_union_union_nested_t) unionfield_point() *_Cgo_point3d_t {
-	return (*_Cgo_point3d_t)(unsafe.Pointer(&union.$union))
+func (union *C.union_union_nested_t) unionfield_point() *C.point3d_t {
+	return (*C.point3d_t)(unsafe.Pointer(&union.$union))
 }
-func (union *_Cgo_union_union_nested_t) unionfield_array() *_Cgo_unionarray_t {
-	return (*_Cgo_unionarray_t)(unsafe.Pointer(&union.$union))
+func (union *C.union_union_nested_t) unionfield_array() *C.unionarray_t {
+	return (*C.unionarray_t)(unsafe.Pointer(&union.$union))
 }
-func (union *_Cgo_union_union_nested_t) unionfield_thing() *_Cgo_union3_t {
-	return (*_Cgo_union3_t)(unsafe.Pointer(&union.$union))
+func (union *C.union_union_nested_t) unionfield_thing() *C.union3_t {
+	return (*C.union3_t)(unsafe.Pointer(&union.$union))
 }
 
-type _Cgo_union_nested_t = _Cgo_union_union_nested_t
-type _Cgo_enum_option = _Cgo_int
-type _Cgo_option_t = _Cgo_enum_option
-type _Cgo_enum_option2_t = _Cgo_uint
-type _Cgo_option2_t = _Cgo_enum_option2_t
-type _Cgo_struct_types_t struct {
+type C.union_nested_t = C.union_union_nested_t
+type C.enum_option = C.int
+type C.option_t = C.enum_option
+type C.enum_option2_t = C.uint
+type C.option2_t = C.enum_option2_t
+type C.struct_types_t struct {
 	f   float32
 	d   float64
-	ptr *_Cgo_int
+	ptr *C.int
 }
-type _Cgo_types_t = _Cgo_struct_types_t
-type _Cgo_myIntArray = [10]_Cgo_int
-type _Cgo_struct_bitfield_t struct {
-	start        _Cgo_uchar
-	__bitfield_1 _Cgo_uchar
+type C.types_t = C.struct_types_t
+type C.myIntArray = [10]C.int
+type C.struct_bitfield_t struct {
+	start        C.uchar
+	__bitfield_1 C.uchar
 
-	d _Cgo_uchar
-	e _Cgo_uchar
+	d C.uchar
+	e C.uchar
 }
 
-func (s *_Cgo_struct_bitfield_t) bitfield_a() _Cgo_uchar { return s.__bitfield_1 & 0x1f }
-func (s *_Cgo_struct_bitfield_t) set_bitfield_a(value _Cgo_uchar) {
+func (s *C.struct_bitfield_t) bitfield_a() C.uchar { return s.__bitfield_1 & 0x1f }
+func (s *C.struct_bitfield_t) set_bitfield_a(value C.uchar) {
 	s.__bitfield_1 = s.__bitfield_1&^0x1f | value&0x1f<<0
 }
-func (s *_Cgo_struct_bitfield_t) bitfield_b() _Cgo_uchar {
+func (s *C.struct_bitfield_t) bitfield_b() C.uchar {
 	return s.__bitfield_1 >> 5 & 0x1
 }
-func (s *_Cgo_struct_bitfield_t) set_bitfield_b(value _Cgo_uchar) {
+func (s *C.struct_bitfield_t) set_bitfield_b(value C.uchar) {
 	s.__bitfield_1 = s.__bitfield_1&^0x20 | value&0x1<<5
 }
-func (s *_Cgo_struct_bitfield_t) bitfield_c() _Cgo_uchar {
+func (s *C.struct_bitfield_t) bitfield_c() C.uchar {
 	return s.__bitfield_1 >> 6
 }
-func (s *_Cgo_struct_bitfield_t) set_bitfield_c(value _Cgo_uchar,
+func (s *C.struct_bitfield_t) set_bitfield_c(value C.uchar,
 
 ) { s.__bitfield_1 = s.__bitfield_1&0x3f | value<<6 }
 
-type _Cgo_bitfield_t = _Cgo_struct_bitfield_t
+type C.bitfield_t = C.struct_bitfield_t

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
@@ -139,7 +127,7 @@ 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
@@ -264,18 +252,10 @@ func MuslArchitecture(triple string) string {
 	return CanonicalArchName(triple)
 }
 
-// Returns true if the libc needs to include malloc, for the libcs where this
-// matters.
-func (c *Config) LibcNeedsMalloc() bool {
-	if c.GC() == "boehm" && c.Target.Libc == "wasi-libc" {
-		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 {
+// LibcPath returns the path to the libc directory. The libc path will be either
+// a precompiled libc shipped with a TinyGo build, or a libc path in the cache
+// directory (which might not yet be built).
+func (c *Config) LibcPath(name string) (path string, precompiled bool) {
 	archname := c.Triple()
 	if c.CPU() != "" {
 		archname += "-" + c.CPU()
@@ -286,24 +266,18 @@ 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.
-	if v, ok := libVersions[name]; ok {
-		archname += "-v" + strconv.Itoa(v)
-	}
-
-	options := ""
-	if c.LibcNeedsMalloc() {
-		options += "+malloc"
+	// Try to load a precompiled library.
+	precompiledDir := filepath.Join(goenv.Get("TINYGOROOT"), "pkg", archname, name)
+	if _, err := os.Stat(precompiledDir); err == nil {
+		// Found a precompiled library for this OS/architecture. Return the path
+		// directly.
+		return precompiledDir, true
 	}
 
 	// No precompiled library found. Determine the path name that will be used
 	// in the build cache.
-	return filepath.Join(goenv.Get("GOCACHE"), name+options+"-"+archname)
+	return filepath.Join(goenv.Get("GOCACHE"), name+"-"+archname), false
 }
 
 // DefaultBinaryExtension returns the default extension for binaries, such as
@@ -346,7 +320,59 @@ 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 +399,6 @@ 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.

compileopts/options.go

@@ -8,8 +8,8 @@ import (
 )
 
 var (
-	validBuildModeOptions     = []string{"default", "c-shared", "wasi-legacy"}
-	validGCOptions            = []string{"none", "leaking", "conservative", "custom", "precise", "boehm"}
+	validBuildModeOptions     = []string{"default", "c-shared"}
+	validGCOptions            = []string{"none", "leaking", "conservative", "custom", "precise"}
 	validSchedulerOptions     = []string{"none", "tasks", "asyncify", "threads", "cores"}
 	validSerialOptions        = []string{"none", "uart", "usb", "rtt"}
 	validPrintSizeOptions     = []string{"none", "short", "full", "html"}
@@ -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
@@ -53,6 +52,7 @@ type Options struct {
 	Programmer      string
 	OpenOCDCommands []string
 	LLVMFeatures    string
+	PrintJSON       bool
 	Monitor         bool
 	BaudRate        int
 	Timeout         time.Duration

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`)
-	expectedSchedulerError := errors.New(`invalid scheduler option 'incorrect': valid values are none, tasks, asyncify, threads, cores`)
+	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`)
 	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

@@ -178,21 +178,6 @@ func (spec *TargetSpec) resolveInherits() error {
 
 // 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)
 	}
@@ -262,6 +247,7 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 		GOOS:             options.GOOS,
 		GOARCH:           options.GOARCH,
 		BuildTags:        []string{options.GOOS, options.GOARCH},
+		GC:               "precise",
 		Linker:           "cc",
 		DefaultStackSize: 1024 * 64, // 64kB
 		GDB:              []string{"gdb"},
@@ -369,7 +355,17 @@ 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)
 	}
@@ -379,13 +375,12 @@ 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.Scheduler = "tasks"
 		spec.Linker = "ld.lld"
 		spec.Libc = "darwin-libSystem"
 		// Use macosx* instead of darwin, otherwise darwin/arm64 will refer to
@@ -399,12 +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"
@@ -430,26 +423,17 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 			"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",
@@ -465,18 +449,27 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 			"--no-insert-timestamp",
 			"--no-dynamicbase",
 		)
-	case "wasm", "wasip1", "wasip2":
-		return nil, fmt.Errorf("GOOS=%s but GOARCH is unset. Please set GOARCH to wasm", options.GOOS)
+	case "wasip1":
+		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
@@ -508,6 +501,7 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 		}
 		spec.ExtraFiles = append(spec.ExtraFiles, "src/runtime/asm_"+asmGoarch+suffix+".S")
 		spec.ExtraFiles = append(spec.ExtraFiles, "src/internal/task/task_stack_"+asmGoarch+suffix+".S")
+		spec.ExtraFiles = append(spec.ExtraFiles, "src/internal/task/task_cores.c")
 	}
 
 	// Configure the emulator.

compiler/alias.go

@@ -18,12 +18,11 @@ var stdlibAliases = map[string]string{
 	// crypto packages
 	"crypto/ed25519/internal/edwards25519/field.feMul": "crypto/ed25519/internal/edwards25519/field.feMulGeneric",
 	"crypto/internal/edwards25519/field.feSquare":      "crypto/ed25519/internal/edwards25519/field.feSquareGeneric",
-	"crypto/md5.block":           "crypto/md5.blockGeneric",
-	"crypto/sha1.block":          "crypto/sha1.blockGeneric",
-	"crypto/sha1.blockAMD64":     "crypto/sha1.blockGeneric",
-	"crypto/sha256.block":        "crypto/sha256.blockGeneric",
-	"crypto/sha512.blockAMD64":   "crypto/sha512.blockGeneric",
-	"internal/chacha8rand.block": "internal/chacha8rand.block_generic",
+	"crypto/md5.block":         "crypto/md5.blockGeneric",
+	"crypto/sha1.block":        "crypto/sha1.blockGeneric",
+	"crypto/sha1.blockAMD64":   "crypto/sha1.blockGeneric",
+	"crypto/sha256.block":      "crypto/sha256.blockGeneric",
+	"crypto/sha512.blockAMD64": "crypto/sha512.blockGeneric",
 
 	// AES
 	"crypto/aes.decryptBlockAsm": "crypto/aes.decryptBlock",

compiler/calls.go

@@ -76,15 +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)
-	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
+	return b.CreateCall(fnType, fn, expanded, name)
 }
 
 // createInvoke is like createCall but continues execution at the landing pad if

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
 }
 
@@ -389,7 +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()))
@@ -497,21 +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,
@@ -874,11 +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
@@ -1856,7 +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.
@@ -1892,29 +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

@@ -103,11 +103,10 @@ func (b *builder) createLandingPad() {
 	b.CreateBr(b.blockEntries[b.fn.Recover])
 }
 
-// Create a checkpoint (similar to setjmp). This emits inline assembly that
-// stores the current program counter inside the ptr address (actually
-// ptr+sizeof(ptr)) and then returns a boolean indicating whether this is the
-// normal flow (false) or we jumped here from somewhere else (true).
-func (b *builder) createCheckpoint(ptr llvm.Value) llvm.Value {
+// createInvokeCheckpoint saves the function state at the given point, to
+// continue at the landing pad if a panic happened. This is implemented using a
+// setjmp-like construct.
+func (b *builder) createInvokeCheckpoint() {
 	// Construct inline assembly equivalents of setjmp.
 	// The assembly works as follows:
 	//   * All registers (both callee-saved and caller saved) are clobbered
@@ -218,19 +217,11 @@ 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)

compiler/inlineasm.go

@@ -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

@@ -122,9 +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)
@@ -515,7 +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
@@ -945,7 +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

@@ -121,29 +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)
-}
-
 var mathToLLVMMapping = map[string]string{
 	"math.Ceil":  "llvm.ceil.f64",
 	"math.Exp":   "llvm.exp.f64",

compiler/llvm.go

@@ -371,6 +371,13 @@ func (c *compilerContext) getPointerBitmap(typ llvm.Type, pos token.Pos) *big.In
 		return big.NewInt(1)
 	case llvm.StructTypeKind:
 		ptrs := big.NewInt(0)
+		if typ.StructName() == "runtime.funcValue" {
+			// Hack: the type runtime.funcValue contains an 'id' field which is
+			// of type uintptr, but before the LowerFuncValues pass it actually
+			// contains a pointer (ptrtoint) to a global. This trips up the
+			// interp package. Therefore, make the id field a pointer for now.
+			typ = c.ctx.StructType([]llvm.Type{c.dataPtrType, c.dataPtrType}, false)
+		}
 		for i, subtyp := range typ.StructElementTypes() {
 			subptrs := c.getPointerBitmap(subtyp, pos)
 			if subptrs.BitLen() == 0 {
@@ -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

@@ -248,7 +248,7 @@ 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:
 		return keyType.Info()&(types.IsBoolean|types.IsInteger) != 0
 	case *types.Pointer:
@@ -263,6 +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

@@ -208,12 +208,8 @@ 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)
-		}
+	case "tinygo_exitTask", "tinygo_schedulerUnlock":
+		llvmutil.AppendToGlobal(c.mod, "llvm.used", llvmFn)
 	}
 
 	// External/exported functions may not retain pointer values.
@@ -253,23 +249,6 @@ 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
@@ -306,11 +285,6 @@ func (c *compilerContext) getFunctionInfo(f *ssa.Function) functionInfo {
 		info.wasmName = "_start"
 		info.exported = true
 	}
-	if info.linkName == "runtime.wasmEntryLegacy" && c.BuildMode == "wasi-legacy" {
-		info.linkName = "_start"
-		info.wasmName = "_start"
-		info.exported = true
-	}
 
 	// Check for //go: pragmas, which may change the link name (among others).
 	c.parsePragmas(&info, f)
@@ -455,16 +429,13 @@ func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
 			// pass for C variadic functions. This includes both explicit
 			// (with ...) and implicit (no parameters in signature)
 			// functions.
-			if strings.HasPrefix(f.Name(), "_Cgo_") {
-				// This prefix was created as a result of CGo preprocessing.
+			if strings.HasPrefix(f.Name(), "C.") {
+				// This prefix cannot naturally be created, it must have
+				// been created as a result of CGo preprocessing.
 				info.variadic = true
 			}
 		}
 	}
-
-	if c.Nobounds {
-		info.nobounds = true
-	}
 }
 
 // Check whether this function can be used in //go:wasmimport or
@@ -473,7 +444,7 @@ 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
@@ -630,7 +601,7 @@ 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
@@ -715,14 +686,14 @@ 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)
 	}
 	return info
 }
 
 // Parse //go: pragma comments from the source. In particular, it parses the
-// //go:extern and //go:linkname pragmas on globals.
-func (info *globalInfo) parsePragmas(doc *ast.CommentGroup, c *compilerContext, g *ssa.Global) {
+// //go:extern pragma on globals.
+func (info *globalInfo) parsePragmas(doc *ast.CommentGroup) {
 	for _, comment := range doc.List {
 		if !strings.HasPrefix(comment.Text, "//go:") {
 			continue
@@ -743,17 +714,6 @@ 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

@@ -268,8 +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
@@ -287,17 +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:
@@ -308,24 +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
-		// 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()
-		}
+		b.CreateCall(setLastError.GlobalValueType(), setLastError, []llvm.Value{llvm.ConstNull(b.ctx.Int32Type())}, "")
 		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")
 		}

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 #1 = { "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,+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,+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 #1 = { "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,+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,+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

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 #1 = { "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,+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,+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 #1 = { "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,+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,+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.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 }
@@ -105,18 +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 nuw (i8, ptr @main.slice1, i32 8), align 4
+  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice1, i32 4), 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 nuw (i8, ptr @main.slice2, i32 8), align 4
+  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice2, i32 4), 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 nuw (i8, ptr @main.slice3, i32 8), align 4
+  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice3, i32 4), align 4
+  store i32 5, ptr getelementptr inbounds (i8, ptr @main.slice3, i32 8), align 4
   ret void
 }
 
@@ -127,7 +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
@@ -135,7 +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 #1 = { "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,+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,+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 }
@@ -57,7 +57,7 @@ entry:
   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 #1 = { "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,+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,+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 }
@@ -86,7 +86,7 @@ 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
 }
@@ -125,7 +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
 }
@@ -171,9 +171,9 @@ 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,+bulk-memory-opt,+call-indirect-overlong,+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 #2 = { nounwind "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,+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

@@ -65,7 +65,7 @@ entry:
   store i32 3, ptr %n, align 4
   %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) #9
   call void @"internal/task.start"(i32 ptrtoint (ptr @"main.closureFunctionGoroutine$1$gowrapper" to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #9
@@ -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$1"(i32 %1, ptr %3)
   ret void
@@ -104,9 +104,9 @@ define hidden void @main.funcGoroutine(ptr %fn.context, ptr %fn.funcptr, ptr %co
 entry:
   %0 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #9
   store i32 5, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %1 = getelementptr inbounds i8, ptr %0, i32 4
   store ptr %fn.context, ptr %1, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %2 = getelementptr inbounds i8, ptr %0, i32 8
   store ptr %fn.funcptr, ptr %2, align 4
   %stacksize = call i32 @"internal/task.getGoroutineStackSize"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr undef) #9
   call void @"internal/task.start"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr nonnull %0, i32 %stacksize, ptr undef) #9
@@ -117,9 +117,9 @@ entry:
 define linkonce_odr void @main.funcGoroutine.gowrapper(ptr %0) unnamed_addr #6 {
 entry:
   %1 = load i32, ptr %0, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %2 = getelementptr inbounds i8, ptr %0, i32 4
   %3 = load ptr, ptr %2, align 4
-  %4 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %4 = getelementptr inbounds i8, ptr %0, i32 8
   %5 = load ptr, ptr %4, align 4
   call void %5(i32 %1, ptr %3) #9
   ret void
@@ -154,11 +154,11 @@ define hidden void @main.startInterfaceMethod(ptr %itf.typecode, ptr %itf.value,
 entry:
   %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
   store ptr %itf.value, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %1 = getelementptr inbounds i8, ptr %0, i32 4
   store ptr @"main$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) #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) #9
@@ -171,11 +171,11 @@ declare void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr, ptr, i
 define linkonce_odr void @"interface:{Print:func:{basic:string}{}}.Print$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) #9
   ret void

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
@@ -72,7 +72,7 @@ entry:
   %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) #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) #9
   %2 = load i32, ptr %n, align 4
@@ -93,7 +93,7 @@ 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$1"(i32 %1, ptr %3)
   call void @runtime.deadlock(ptr undef) #9
@@ -113,9 +113,9 @@ entry:
   %0 = call align 4 dereferenceable(12) ptr @runtime.alloc(i32 12, ptr null, ptr undef) #9
   call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
   store i32 5, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %1 = getelementptr inbounds i8, ptr %0, i32 4
   store ptr %fn.context, ptr %1, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %2 = getelementptr inbounds i8, ptr %0, i32 8
   store ptr %fn.funcptr, ptr %2, align 4
   call void @"internal/task.start"(i32 ptrtoint (ptr @main.funcGoroutine.gowrapper to i32), ptr nonnull %0, i32 65536, ptr undef) #9
   ret void
@@ -125,9 +125,9 @@ entry:
 define linkonce_odr void @main.funcGoroutine.gowrapper(ptr %0) unnamed_addr #6 {
 entry:
   %1 = load i32, ptr %0, align 4
-  %2 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %2 = getelementptr inbounds i8, ptr %0, i32 4
   %3 = load ptr, ptr %2, align 4
-  %4 = getelementptr inbounds nuw i8, ptr %0, i32 8
+  %4 = getelementptr inbounds i8, ptr %0, i32 8
   %5 = load ptr, ptr %4, align 4
   call void %5(i32 %1, ptr %3) #9
   call void @runtime.deadlock(ptr undef) #9
@@ -165,11 +165,11 @@ entry:
   %0 = call align 4 dereferenceable(16) ptr @runtime.alloc(i32 16, ptr null, ptr undef) #9
   call void @runtime.trackPointer(ptr nonnull %0, ptr nonnull %stackalloc, ptr undef) #9
   store ptr %itf.value, ptr %0, align 4
-  %1 = getelementptr inbounds nuw i8, ptr %0, i32 4
+  %1 = getelementptr inbounds i8, ptr %0, i32 4
   store ptr @"main$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) #9
   ret void
@@ -181,24 +181,24 @@ declare void @"interface:{Print:func:{basic:string}{}}.Print$invoke"(ptr, ptr, i
 define linkonce_odr void @"interface:{Print:func:{basic:string}{}}.Print$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) #9
   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 #1 = { "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,+bulk-memory-opt,+call-indirect-overlong,+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 #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 #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$1" }
-attributes #6 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper" }
-attributes #7 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="reflect/methods.Print(string)" "tinygo-methods"="reflect/methods.Print(string)" }
-attributes #8 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="interface:{Print:func:{basic:string}{}}.Print$invoke" }
+attributes #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 = { 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,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.inlineFunctionGoroutine$1" }
+attributes #5 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="main.closureFunctionGoroutine$1" }
+attributes #6 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper" }
+attributes #7 = { "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-invoke"="reflect/methods.Print(string)" "tinygo-methods"="reflect/methods.Print(string)" }
+attributes #8 = { nounwind "target-features"="+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-gowrapper"="interface:{Print:func:{basic:string}{}}.Print$invoke" }
 attributes #9 = { 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 }
@@ -130,11 +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 #1 = { "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,+bulk-memory-opt,+call-indirect-overlong,+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 #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 #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 #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 #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 = { "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,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-methods"="reflect/methods.String() string" }
+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,+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 #1 = { "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,+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,+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.ll

@@ -1,6 +1,6 @@
 ; 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"
 
 @extern_global = external global [0 x i8], align 1
@@ -93,13 +93,13 @@ 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 #1 = { "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,+bulk-memory-opt,+call-indirect-overlong,+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 #4 = { inlinehint 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,+bulk-memory-opt,+call-indirect-overlong,+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 #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 #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 #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 #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 = { 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,+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,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="exportedFunctionInSection" }
+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,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="foobar" "wasm-import-name"="imported" }
+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)
@@ -51,9 +51,9 @@ entry:
   %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) #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 undef) #3
   %append.newPtr = extractvalue { ptr, i32, i32 } %append.new, 0
@@ -322,7 +322,7 @@ unsafe.Slice.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 #1 = { "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,+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,+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/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 }
@@ -84,11 +84,11 @@ declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #1
 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 #1 = { "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,+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,+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 #1 = { "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,+bulk-memory-opt,+call-indirect-overlong,+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 #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 = { 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{
-			Pos: err.Fset.Position(err.Pos),
-			Msg: err.Msg,
+		return []Diagnostic{
+			{
+				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
-// relative path if possible. Paths inside GOROOT/TINYGOROOT will remain
-// absolute.
-func RelativePosition(pos token.Position, wd string) token.Position {
-	// Check whether we even have a working directory.
+// try to make the path relative to the current working directory. If any error
+// occurs, this error is ignored and the absolute path is returned instead.
+func tryToMakePathRelative(dir, wd string) string {
 	if wd == "" {
-		return pos
+		return dir // working directory not found
 	}
-
-	// Paths inside GOROOT should be printed in full.
-	if strings.HasPrefix(pos.Filename, filepath.Join(goenv.Get("GOROOT"), "src")) || strings.HasPrefix(pos.Filename, filepath.Join(goenv.Get("TINYGOROOT"), "src")) {
-		return pos
+	relpath, err := filepath.Rel(wd, dir)
+	if err != nil {
+		return dir
 	}
-
-	// 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
+	return relpath
 }

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)
-	if err != nil {
-		t.Fatal("expected to get a compiler error")
-	}
-	err = Build(filename, tmpdir+"/out", config)
+	err := Build(filename, tmpdir+"/out", options)
 	if err == nil {
 		t.Fatal("expected to get a compiler error")
 	}

flake.lock

@@ -20,16 +20,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1747953325,
-        "narHash": "sha256-y2ZtlIlNTuVJUZCqzZAhIw5rrKP4DOSklev6c8PyCkQ=",
+        "lastModified": 1728500571,
+        "narHash": "sha256-dOymOQ3AfNI4Z337yEwHGohrVQb4yPODCW9MDUyAc4w=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "55d1f923c480dadce40f5231feb472e81b0bab48",
+        "rev": "d51c28603def282a24fa034bcb007e2bcb5b5dd0",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-25.05",
+        "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-25.05";
+    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_20.libclang
+            llvmPackages_18.llvm
+            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

@@ -1,10 +1,12 @@
 module github.com/tinygo-org/tinygo
 
-go 1.22.0
+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/google/shlex v0.0.0-20181106134648-c34317bd91bf
 	github.com/inhies/go-bytesize v0.0.0-20220417184213-4913239db9cf
@@ -14,16 +16,22 @@ require (
 	github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3
 	github.com/tetratelabs/wazero v1.6.0
 	go.bug.st/serial v1.6.0
-	golang.org/x/net v0.35.0
-	golang.org/x/sys v0.30.0
-	golang.org/x/tools v0.30.0
+	golang.org/x/net v0.26.0
+	golang.org/x/sys v0.21.0
+	golang.org/x/tools v0.22.1-0.20240621165957-db513b091504
 	gopkg.in/yaml.v2 v2.4.0
-	tinygo.org/x/go-llvm v0.0.0-20250422114502-b8f170971e74
+	tinygo.org/x/go-llvm v0.0.0-20250119132755-9dca92dfb4f9
 )
 
 require (
+	github.com/chromedp/sysutil v1.0.0 // indirect
 	github.com/creack/goselect v0.1.2 // indirect
+	github.com/gobwas/httphead v0.1.0 // indirect
+	github.com/gobwas/pool v0.2.1 // indirect
+	github.com/gobwas/ws v1.1.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/stretchr/testify v1.8.4 // indirect
-	golang.org/x/text v0.22.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
 )

go.sum

@@ -1,17 +1,33 @@
-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/aykevl/go-wasm v0.0.2-0.20240825160117-b76c3f9f0982 h1:cD7QfvrJdYmBw2tFP/VyKPT8ZESlcrwSwo7SvH9Y4dc=
+github.com/aykevl/go-wasm v0.0.2-0.20240825160117-b76c3f9f0982/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/chromedp/cdproto v0.0.0-20211126220118-81fa0469ad77/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
+github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee h1:+SFdIVfQpG0s0DHYzou0kgfE0n0ZjKPwbiRJsXrZegU=
+github.com/chromedp/cdproto v0.0.0-20220113222801-0725d94bb6ee/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
+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 v1.1.1 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/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
+github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
+github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
+github.com/gobwas/ws v1.1.0 h1:7RFti/xnNkMJnrK7D1yQ/iCIB5OrrY/54/H930kIbHA=
+github.com/gobwas/ws v1.1.0/go.mod h1:nzvNcVha5eUziGrbxFCo6qFIojQHjJV5cLYIbezhfL0=
 github.com/gofrs/flock v0.8.1 h1:+gYjHKf32LDeiEEFhQaotPbLuUXjY5ZqxKgXy7n59aw=
 github.com/gofrs/flock v0.8.1/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
 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/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/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
+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=
@@ -25,8 +41,9 @@ github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D
 github.com/mattn/go-runewidth v0.0.7/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/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5 h1:1SoBaSPudixRecmlHXb/GxmaD3fLMtHIDN13QujwQuc=
+github.com/orisano/pixelmatch v0.0.0-20210112091706-4fa4c7ba91d5/go.mod h1:nZgzbfBr3hhjoZnS66nKrHmduYNpc34ny7RK4z5/HM0=
 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/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3 h1:aQKxg3+2p+IFXXg97McgDGT5zcMrQoi0EICZs8Pgchs=
 github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3/go.mod h1:9/etS5gpQq9BJsJMWg1wpLbfuSnkm8dPF6FdW2JXVhA=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
@@ -35,28 +52,27 @@ github.com/tetratelabs/wazero v1.6.0 h1:z0H1iikCdP8t+q341xqepY4EWvHEw8Es7tlqiVzl
 github.com/tetratelabs/wazero v1.6.0/go.mod h1:0U0G41+ochRKoPKCJlh0jMg1CHkyfK8kDqiirMmKY8A=
 go.bug.st/serial v1.6.0 h1:mAbRGN4cKE2J5gMwsMHC2KQisdLRQssO9WSM+rbZJ8A=
 go.bug.st/serial v1.6.0/go.mod h1:UABfsluHAiaNI+La2iESysd9Vetq7VRdpxvjx7CmmOE=
-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/mod v0.18.0 h1:5+9lSbEzPSdWkH32vYPBwEpX8KwDbM52Ud9xBUvNlb0=
+golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ=
+golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
 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 v0.0.0-20201207223542-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 v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
-golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
-golang.org/x/tools v0.30.0 h1:BgcpHewrV5AUp2G9MebG4XPFI1E2W41zU1SaqVA9vJY=
-golang.org/x/tools v0.30.0/go.mod h1:c347cR/OJfw5TI+GfX7RUPNMdDRRbjvYTS0jPyvsVtY=
+golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
+golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
+golang.org/x/tools v0.22.1-0.20240621165957-db513b091504 h1:MMsD8mMfluf/578+3wrTn22pjI/Xkzm+gPW47SYfspY=
+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 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-tinygo.org/x/go-llvm v0.0.0-20250422114502-b8f170971e74 h1:ovavgTdIBWCH8YWlcfq9gkpoyT1+IxMKSn+Df27QwE8=
-tinygo.org/x/go-llvm v0.0.0-20250422114502-b8f170971e74/go.mod h1:GFbusT2VTA4I+l4j80b17KFK+6whv69Wtny5U+T8RR0=
+tinygo.org/x/go-llvm v0.0.0-20250119132755-9dca92dfb4f9 h1:rMvEzuCYjyiR+pmdiCVWTQw3L6VqiSIXoL19I3lYufE=
+tinygo.org/x/go-llvm v0.0.0-20250119132755-9dca92dfb4f9/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 = "0.40.0-dev"
+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/wasm-tools/go.mod

@@ -1,22 +1,18 @@
-module github.com/tinygo-org/tinygo/internal/wasm-tools
+module github.com/tinygo-org/tinygo/internal/tools
 
-go 1.23.0
+go 1.22.4
 
-require (
-	go.bytecodealliance.org v0.6.2
-	go.bytecodealliance.org/cm v0.2.2
-)
+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 v1.18.0 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
-	github.com/regclient/regclient v0.8.2 // indirect
+	github.com/regclient/regclient v0.7.1 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
-	github.com/tetratelabs/wazero v1.9.0 // indirect
 	github.com/ulikunitz/xz v0.5.12 // indirect
-	github.com/urfave/cli/v3 v3.0.0-beta1 // indirect
-	golang.org/x/mod v0.24.0 // indirect
-	golang.org/x/sys v0.31.0 // 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

@@ -1,3 +1,5 @@
+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=
@@ -5,16 +7,16 @@ 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 v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
-github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
-github.com/olareg/olareg v0.1.1 h1:Ui7q93zjcoF+U9U71sgqgZWByDoZOpqHitUXEu2xV+g=
-github.com/olareg/olareg v0.1.1/go.mod h1:w8NP4SWrHHtxsFaUiv1lnCnYPm4sN1seCd2h7FK/dc0=
+github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
+github.com/olareg/olareg v0.1.0 h1:1dXBOgPrig5N7zoXyIZVQqU0QBo6sD9pbL6UYjY75CA=
+github.com/olareg/olareg v0.1.0/go.mod h1:RBuU7JW7SoIIxZKzLRhq8sVtQeAHzCAtRrXEBx2KlM4=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 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 v0.8.2 h1:23BQ3jWgKYHHIXUhp/S9laVJDHDoOQaQCzXMJ4undVE=
-github.com/regclient/regclient v0.8.2/go.mod h1:uGyetv0o6VLyRDjtfeBqp/QBwRLJ3Hcn07/+8QbhNcM=
+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=
@@ -23,25 +25,19 @@ github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 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/tetratelabs/wazero v1.9.0 h1:IcZ56OuxrtaEz8UYNRHBrUa9bYeX9oVY93KspZZBf/I=
-github.com/tetratelabs/wazero v1.9.0/go.mod h1:TSbcXCfFP0L2FGkRPxHphadXPjo1T6W+CseNNY7EkjM=
 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-beta1 h1:6DTaaUarcM0wX7qj5Hcvs+5Dm3dyUTBbEwIWAjcw9Zg=
-github.com/urfave/cli/v3 v3.0.0-beta1/go.mod h1:FnIeEMYu+ko8zP1F9Ypr3xkZMIDqW3DR92yUtY39q1Y=
-go.bytecodealliance.org v0.6.2 h1:Jy4u5DVmSkXgsnwojBhJ+AD/YsJsR3VzVnxF0xRCqTQ=
-go.bytecodealliance.org v0.6.2/go.mod h1:gqjTJm0y9NSksG4py/lSjIQ/SNuIlOQ+hCIEPQwtJgA=
-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 v0.24.0 h1:ZfthKaKaT4NrhGVZHO1/WDTwGES4De8KtWO0SIbNJMU=
-golang.org/x/mod v0.24.0/go.mod h1:IXM97Txy2VM4PJ3gI61r1YEk/gAj6zAHN3AdZt6S9Ww=
-golang.org/x/sync v0.11.0 h1:GGz8+XQP4FvTTrjZPzNKTMFtSXH80RAzG+5ghFPgK9w=
-golang.org/x/sync v0.11.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+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 v0.31.0 h1:ioabZlmFYtWhL+TRYpcnNlLwhyxaM9kWTDEmfnprqik=
-golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
-golang.org/x/tools v0.30.0 h1:BgcpHewrV5AUp2G9MebG4XPFI1E2W41zU1SaqVA9vJY=
-golang.org/x/tools v0.30.0/go.mod h1:c347cR/OJfw5TI+GfX7RUPNMdDRRbjvYTS0jPyvsVtY=
+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=

internal/wasm-tools/tools.go

@@ -5,8 +5,7 @@
 package tools
 
 import (
-	_ "go.bytecodealliance.org/cm"
-	_ "go.bytecodealliance.org/cmd/wit-bindgen-go"
+	_ "github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go"
 )
 
-//go:generate go install go.bytecodealliance.org/cmd/wit-bindgen-go
+//go:generate go install github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go

interp/interpreter.go

@@ -364,22 +364,9 @@ func (r *runner) run(fn *function, params []value, parentMem *memoryView, indent
 						continue
 					}
 					nBytes := uint32(n * elemSize)
-					srcObj := mem.get(src.index())
 					dstObj := mem.getWritable(dst.index())
-					if srcObj.buffer == nil || dstObj.buffer == nil {
-						// If the buffer is nil, it means the slice 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():dst.offset()+nBytes], srcBuf.buf[src.offset():])
 					dstObj.buffer = dstBuf
 					mem.put(dst.index(), dstObj)
@@ -577,7 +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)
@@ -983,9 +970,9 @@ func (r *runner) runAtRuntime(fn *function, inst instruction, locals []value, me
 	case llvm.Call:
 		llvmFn := operands[len(operands)-1]
 		args := operands[:len(operands)-1]
-		for _, op := range operands {
-			if op.Type().TypeKind() == llvm.PointerTypeKind {
-				err := mem.markExternalStore(op)
+		for _, arg := range args {
+			if arg.Type().TypeKind() == llvm.PointerTypeKind {
+				err := mem.markExternalStore(arg)
 				if err != nil {
 					return r.errorAt(inst, err)
 				}

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/slice-copy.ll

@@ -11,10 +11,6 @@ target triple = "x86_64--linux"
 @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
-@main.sliceSrcExternal1.buf = external global [2 x i8]
-@main.sliceDstExternal1.buf = internal global [2 x i8] zeroinitializer
-@main.sliceSrcExternal2.buf = internal global [2 x i8] zeroinitializer
-@main.sliceDstExternal2.buf = external global [2 x i8]
 
 declare i64 @runtime.sliceCopy(ptr %dst, ptr %src, i64 %dstLen, i64 %srcLen, i64 %elemSize) unnamed_addr
 
@@ -62,14 +58,6 @@ entry:
   %sliceDstTaint.val = load i8, ptr getelementptr inbounds (i8, ptr @main.sliceDstTaint.buf, i32 0)
   call void @runtime.printuint8(i8 %sliceDstTaint.val)
 
-  ; print(sliceDstExternal1[0])
-  %sliceDstExternal1.val = load i8, ptr getelementptr inbounds (i8, ptr @main.sliceDstExternal1.buf, i32 0)
-  call void @runtime.printuint8(i8 %sliceDstExternal1.val)
-
-  ; print(sliceDstExternal2[0])
-  %sliceDstExternal2.val = load i8, ptr getelementptr inbounds (i8, ptr @main.sliceDstExternal2.buf, i32 0)
-  call void @runtime.printuint8(i8 %sliceDstExternal2.val)
-
   ret void
 }
 
@@ -114,11 +102,5 @@ entry:
   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)
 
-  ; Test that copying from or into external buffers works correctly.
-  ; These copy operations must be done at runtime.
-  ; https://github.com/tinygo-org/tinygo/issues/4895
-  %copy.n5 = call i64 @runtime.sliceCopy(ptr @main.sliceDstExternal1.buf, ptr @main.sliceSrcExternal1.buf, i64 2, i64 2, i64 1)
-  %copy.n6 = call i64 @runtime.sliceCopy(ptr @main.sliceDstExternal2.buf, ptr @main.sliceSrcExternal2.buf, i64 2, i64 2, i64 1)
-
   ret void
 }

interp/testdata/slice-copy.out.ll

@@ -3,10 +3,6 @@ target triple = "x86_64--linux"
 
 @main.sliceSrcTaint.buf = internal global [2 x i8] c"cd"
 @main.sliceDstTaint.buf = internal global [2 x i8] zeroinitializer
-@main.sliceSrcExternal1.buf = external global [2 x i8]
-@main.sliceDstExternal1.buf = internal global [2 x i8] zeroinitializer
-@main.sliceSrcExternal2.buf = internal global [2 x i8] zeroinitializer
-@main.sliceDstExternal2.buf = external global [2 x i8]
 
 declare i64 @runtime.sliceCopy(ptr, ptr, i64, i64, i64) unnamed_addr
 
@@ -20,8 +16,6 @@ define void @runtime.initAll() unnamed_addr {
 entry:
   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)
-  %copy.n5 = call i64 @runtime.sliceCopy(ptr @main.sliceDstExternal1.buf, ptr @main.sliceSrcExternal1.buf, i64 2, i64 2, i64 1)
-  %copy.n6 = call i64 @runtime.sliceCopy(ptr @main.sliceDstExternal2.buf, ptr @main.sliceSrcExternal2.buf, i64 2, i64 2, i64 1)
   ret void
 }
 
@@ -34,9 +28,5 @@ entry:
   call void @runtime.printuint8(i8 97)
   %sliceDstTaint.val = load i8, ptr @main.sliceDstTaint.buf, align 1
   call void @runtime.printuint8(i8 %sliceDstTaint.val)
-  %sliceDstExternal1.val = load i8, ptr @main.sliceDstExternal1.buf, align 1
-  call void @runtime.printuint8(i8 %sliceDstExternal1.val)
-  %sliceDstExternal2.val = load i8, ptr @main.sliceDstExternal2.buf, align 1
-  call void @runtime.printuint8(i8 %sliceDstExternal2.val)
   ret void
 }

loader/goroot.go

@@ -269,8 +269,6 @@ func pathsToOverride(goMinor int, needsSyscallPackage bool) map[string]bool {
 
 	if needsSyscallPackage {
 		paths["syscall/"] = true // include syscall/js
-		paths["internal/syscall/"] = true
-		paths["internal/syscall/unix/"] = false
 	}
 	return paths
 }

loader/ssa.go

@@ -8,9 +8,7 @@ import (
 //
 // The program must already be parsed and type-checked with the .Parse() method.
 func (p *Program) LoadSSA() *ssa.Program {
-	// TODO: re-enable SanityCheckFunctions when x/tools is upgraded to
-	// a version with a fix for https://golang.org/issues/73594.
-	prog := ssa.NewProgram(p.fset /*ssa.SanityCheckFunctions|*/, ssa.BareInits|ssa.GlobalDebug|ssa.InstantiateGenerics)
+	prog := ssa.NewProgram(p.fset, ssa.SanityCheckFunctions|ssa.BareInits|ssa.GlobalDebug|ssa.InstantiateGenerics)
 
 	for _, pkg := range p.sorted {
 		prog.CreatePackage(pkg.Pkg, pkg.Files, &pkg.info, true)

main.go

@@ -138,13 +138,27 @@ func printCommand(cmd string, args ...string) {
 }
 
 // Build compiles and links the given package and writes it to outpath.
-func Build(pkgName, outpath string, config *compileopts.Config) error {
+func Build(pkgName, outpath string, options *compileopts.Options) error {
+	config, err := builder.NewConfig(options)
+	if err != nil {
+		return err
+	}
+
+	if options.PrintJSON {
+		b, err := json.MarshalIndent(config, "", "  ")
+		if err != nil {
+			handleCompilerError(err)
+		}
+		fmt.Printf("%s\n", string(b))
+		return nil
+	}
+
 	// Create a temporary directory for intermediary files.
 	tmpdir, err := os.MkdirTemp("", "tinygo")
 	if err != nil {
 		return err
 	}
-	if !config.Options.Work {
+	if !options.Work {
 		defer os.RemoveAll(tmpdir)
 	}
 
@@ -291,8 +305,7 @@ func Test(pkgName string, stdout, stderr io.Writer, options *compileopts.Options
 	})
 
 	if testConfig.CompileOnly {
-		// Return the compiler error, if there is one.
-		return true, err
+		return true, nil
 	}
 
 	importPath := strings.TrimSuffix(result.ImportPath, ".test")
@@ -340,17 +353,8 @@ func dirsToModuleRootAbs(maindir, modroot string) []string {
 	return dirs
 }
 
-// validateOutputFormat checks if the output file extension matches the expected format
-func validateOutputFormat(outpath, expectedExt string) error {
-	actualExt := filepath.Ext(outpath)
-	if actualExt != expectedExt {
-		return fmt.Errorf("output format %s does not match target format %s", actualExt, expectedExt)
-	}
-	return nil
-}
-
 // Flash builds and flashes the built binary to the given serial port.
-func Flash(pkgName, port, outpath string, options *compileopts.Options) error {
+func Flash(pkgName, port string, options *compileopts.Options) error {
 	config, err := builder.NewConfig(options)
 	if err != nil {
 		return err
@@ -399,24 +403,13 @@ func Flash(pkgName, port, outpath string, options *compileopts.Options) error {
 	if !options.Work {
 		defer os.RemoveAll(tmpdir)
 	}
-	// Validate output format before building
-	if outpath != "" {
-		if err := validateOutputFormat(outpath, fileExt); err != nil {
-			return err
-		}
-	}
+
 	// Build the binary.
 	result, err := builder.Build(pkgName, fileExt, tmpdir, config)
 	if err != nil {
 		return err
 	}
 
-	// Save output file if specified (after build, before flashing)
-	if outpath != "" {
-		if err := copyFile(result.Binary, outpath); err != nil {
-			return fmt.Errorf("failed to save output file: %v", err)
-		}
-	}
 	// do we need port reset to put MCU into bootloader mode?
 	if config.Target.PortReset == "true" && flashMethod != "openocd" {
 		port, err := getDefaultPort(port, config.Target.SerialPort)
@@ -1034,50 +1027,15 @@ func findFATMounts(options *compileopts.Options) ([]mountPoint, error) {
 			return nil, fmt.Errorf("could not list mount points: %w", err)
 		}
 		for _, elem := range list {
-			volumePath := filepath.Join("/Volumes", elem.Name())
-			if _, err := os.Stat(volumePath); err != nil {
-				continue
-			}
-
-			cmd := exec.Command("diskutil", "info", volumePath)
-			var out bytes.Buffer
-			cmd.Stdout = &out
-			if err := cmd.Run(); err != nil {
-				continue // skip if diskutil failed
-			}
-
-			diskInfo := map[string]string{}
-			scanner := bufio.NewScanner(&out)
-			for scanner.Scan() {
-				line := scanner.Text()
-				parts := strings.SplitN(line, ":", 2)
-				if len(parts) != 2 {
-					continue
-				}
-				key := strings.TrimSpace(parts[0])
-				value := strings.TrimSpace(parts[1])
-				diskInfo[key] = value
-			}
-			if err := scanner.Err(); err != nil {
-				continue
-			}
-
-			volName, okv := diskInfo["Volume Name"]
-			fsType, okf := diskInfo["File System Personality"]
-			if !okv || !okf {
-				continue
-			}
-
-			// Check if a filesystem type is FAT-based
-			if strings.Contains(strings.ToUpper(fsType), "FAT") {
-				points = append(points, mountPoint{
-					name: volName,
-					path: volumePath,
-				})
-			}
+			// TODO: find a way to check for the filesystem type.
+			// (Only return FAT filesystems).
+			points = append(points, mountPoint{
+				name: elem.Name(),
+				path: filepath.Join("/Volumes", elem.Name()),
+			})
 		}
 		sort.Slice(points, func(i, j int) bool {
-			return points[i].path < points[j].path
+			return points[i].path < points[j].name
 		})
 		return points, nil
 	case "linux":
@@ -1318,11 +1276,6 @@ extension at all.`
 			(https://tinygo.org/docs/reference/microcontrollers/).
 			Examples: "arduino-nano", "d1mini", "xiao".
 
-	-o={filename}:
-			Save the built binary to the specified output file. The file
-			format must match the target's expected format (e.g., .hex,
-			.uf2). Both flashing and saving will be performed.
-
 	-monitor: 
 			Start the serial monitor (see below) immediately after
 			flashing. However, some microcontrollers need a split second
@@ -1443,68 +1396,6 @@ func usage(command string) {
 
 }
 
-// Print diagnostics very similar to the -json flag in Go.
-func printBuildOutput(err error, jsonDiagnostics bool) {
-	if err == nil {
-		return // nothing to report
-	}
-
-	if jsonDiagnostics {
-		workingDir, getwdErr := os.Getwd()
-		if getwdErr != nil {
-			workingDir = ""
-		}
-
-		type jsonDiagnosticOutput struct {
-			ImportPath string
-			Action     string
-			Output     string `json:",omitempty"`
-			StartPos   string `json:",omitempty"` // non-standard
-			EndPos     string `json:",omitempty"` // non-standard
-		}
-
-		for _, diags := range diagnostics.CreateDiagnostics(err) {
-			if diags.ImportPath != "" {
-				output, _ := json.Marshal(jsonDiagnosticOutput{
-					ImportPath: diags.ImportPath,
-					Action:     "build-output",
-					Output:     "# " + diags.ImportPath + "\n",
-				})
-				os.Stdout.Write(append(output, '\n'))
-			}
-			for _, diag := range diags.Diagnostics {
-				w := &bytes.Buffer{}
-				diag.WriteTo(w, workingDir)
-				data := jsonDiagnosticOutput{
-					ImportPath: diags.ImportPath,
-					Action:     "build-output",
-					Output:     w.String(),
-				}
-				if diag.StartPos.IsValid() && diag.EndPos.IsValid() {
-					// Include the non-standard StartPos/EndPos values. These
-					// are useful for the TinyGo Playground to show better error
-					// messages.
-					data.StartPos = diagnostics.RelativePosition(diag.StartPos, workingDir).String()
-					data.EndPos = diagnostics.RelativePosition(diag.EndPos, workingDir).String()
-				}
-				output, _ := json.Marshal(data)
-				os.Stdout.Write(append(output, '\n'))
-			}
-
-			// Emit the "Action":"build-fail" JSON.
-			output, _ := json.Marshal(jsonDiagnosticOutput{
-				ImportPath: diags.ImportPath,
-				Action:     "build-fail",
-			})
-			os.Stdout.Write(append(output, '\n'))
-		}
-		os.Exit(1)
-	}
-
-	// Regular diagnostic handling.
-	handleCompilerError(err)
-}
-
 func handleCompilerError(err error) {
 	if err != nil {
 		wd, getwdErr := os.Getwd()
@@ -1601,16 +1492,16 @@ func main() {
 	command := os.Args[1]
 
 	opt := flag.String("opt", "z", "optimization level: 0, 1, 2, s, z")
-	gc := flag.String("gc", "", "garbage collector to use (none, leaking, conservative, custom, precise, boehm)")
+	gc := flag.String("gc", "", "garbage collector to use (none, leaking, conservative)")
 	panicStrategy := flag.String("panic", "print", "panic strategy (print, trap)")
-	scheduler := flag.String("scheduler", "", "which scheduler to use (none, tasks, cores, threads, asyncify)")
+	scheduler := flag.String("scheduler", "", "which scheduler to use (none, tasks, asyncify)")
 	serial := flag.String("serial", "", "which serial output to use (none, uart, usb, rtt)")
 	work := flag.Bool("work", false, "print the name of the temporary build directory and do not delete this directory on exit")
 	interpTimeout := flag.Duration("interp-timeout", 180*time.Second, "interp optimization pass timeout")
 	var tags buildutil.TagsFlag
 	flag.Var(&tags, "tags", "a space-separated list of extra build tags")
 	target := flag.String("target", "", "chip/board name or JSON target specification file")
-	buildMode := flag.String("buildmode", "", "build mode to use (default, c-shared, wasi-legacy)")
+	buildMode := flag.String("buildmode", "", "build mode to use (default, c-shared)")
 	var stackSize uint64
 	flag.Func("stack-size", "goroutine stack size (if unknown at compile time)", func(s string) error {
 		size, err := bytesize.Parse(s)
@@ -1621,10 +1512,8 @@ func main() {
 	printStacks := flag.Bool("print-stacks", false, "print stack sizes of goroutines")
 	printAllocsString := flag.String("print-allocs", "", "regular expression of functions for which heap allocations should be printed")
 	printCommands := flag.Bool("x", false, "Print commands")
-	flagJSON := flag.Bool("json", false, "print output in JSON format")
 	parallelism := flag.Int("p", runtime.GOMAXPROCS(0), "the number of build jobs that can run in parallel")
 	nodebug := flag.Bool("no-debug", false, "strip debug information")
-	nobounds := flag.Bool("nobounds", false, "do not emit bounds checks")
 	ocdCommandsString := flag.String("ocd-commands", "", "OpenOCD commands, overriding target spec (can specify multiple separated by commas)")
 	ocdOutput := flag.Bool("ocd-output", false, "print OCD daemon output during debug")
 	port := flag.String("port", "", "flash port (can specify multiple candidates separated by commas)")
@@ -1647,13 +1536,16 @@ func main() {
 	// development it can be useful to not emit debug information at all.
 	skipDwarf := flag.Bool("internal-nodwarf", false, "internal flag, use -no-debug instead")
 
-	var flagDeps, flagTest bool
+	var flagJSON, flagDeps, flagTest bool
+	if command == "help" || command == "list" || command == "info" || command == "build" {
+		flag.BoolVar(&flagJSON, "json", false, "print data in JSON format")
+	}
 	if command == "help" || command == "list" {
 		flag.BoolVar(&flagDeps, "deps", false, "supply -deps flag to go list")
 		flag.BoolVar(&flagTest, "test", false, "supply -test flag to go list")
 	}
 	var outpath string
-	if command == "help" || command == "build" || command == "test" || command == "flash" {
+	if command == "help" || command == "build" || command == "test" {
 		flag.StringVar(&outpath, "o", "", "output filename")
 	}
 
@@ -1733,7 +1625,6 @@ func main() {
 		SkipDWARF:       *skipDwarf,
 		Semaphore:       make(chan struct{}, *parallelism),
 		Debug:           !*nodebug,
-		Nobounds:        *nobounds,
 		PrintSizes:      *printSize,
 		PrintStacks:     *printStacks,
 		PrintAllocs:     printAllocs,
@@ -1743,6 +1634,7 @@ func main() {
 		Programmer:      *programmer,
 		OpenOCDCommands: ocdCommands,
 		LLVMFeatures:    *llvmFeatures,
+		PrintJSON:       flagJSON,
 		Monitor:         *monitor,
 		BaudRate:        *baudrate,
 		Timeout:         *timeout,
@@ -1792,20 +1684,17 @@ func main() {
 			usage(command)
 			os.Exit(1)
 		}
-		if filepath.Ext(outpath) == ".wasm" && options.GOARCH != "wasm" && options.Target == "" {
-			fmt.Fprintln(os.Stderr, "you appear to want to build a wasm file, but have not specified either a target flag, or the GOARCH/GOOS to use.")
-			os.Exit(1)
+		if options.Target == "" && filepath.Ext(outpath) == ".wasm" {
+			options.Target = "wasm"
 		}
 
-		config, err := builder.NewConfig(options)
+		err := Build(pkgName, outpath, options)
 		handleCompilerError(err)
-		err = Build(pkgName, outpath, config)
-		printBuildOutput(err, *flagJSON)
 	case "flash", "gdb", "lldb":
 		pkgName := filepath.ToSlash(flag.Arg(0))
 		if command == "flash" {
-			err := Flash(pkgName, *port, outpath, options)
-			printBuildOutput(err, *flagJSON)
+			err := Flash(pkgName, *port, options)
+			handleCompilerError(err)
 		} else {
 			if !options.Debug {
 				fmt.Fprintln(os.Stderr, "Debug disabled while running debugger?")
@@ -1813,7 +1702,7 @@ func main() {
 				os.Exit(1)
 			}
 			err := Debug(command, pkgName, *ocdOutput, options)
-			printBuildOutput(err, *flagJSON)
+			handleCompilerError(err)
 		}
 	case "run":
 		if flag.NArg() < 1 {
@@ -1823,7 +1712,7 @@ func main() {
 		}
 		pkgName := filepath.ToSlash(flag.Arg(0))
 		err := Run(pkgName, options, flag.Args()[1:])
-		printBuildOutput(err, *flagJSON)
+		handleCompilerError(err)
 	case "test":
 		var pkgNames []string
 		for i := 0; i < flag.NArg(); i++ {
@@ -1890,7 +1779,6 @@ func main() {
 						wd = ""
 					}
 					diagnostics.CreateDiagnostics(err).WriteTo(os.Stderr, wd)
-					os.Exit(1)
 				}
 				if !passed {
 					select {
@@ -1952,13 +1840,16 @@ func main() {
 			os.Exit(1)
 		}
 		config.GoMinorVersion = 0 // this avoids creating the list of Go1.x build tags.
-
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+		}
 		cachedGOROOT, err := loader.GetCachedGoroot(config)
 		if err != nil {
 			fmt.Fprintln(os.Stderr, err)
 			os.Exit(1)
 		}
-		if *flagJSON {
+		if flagJSON {
 			json, _ := json.MarshalIndent(struct {
 				Target     *compileopts.TargetSpec `json:"target"`
 				GOROOT     string                  `json:"goroot"`
@@ -2000,7 +1891,7 @@ func main() {
 			os.Exit(1)
 		}
 		var extraArgs []string
-		if *flagJSON {
+		if flagJSON {
 			extraArgs = append(extraArgs, "-json")
 		}
 		if flagDeps {

main_test.go

@@ -35,8 +35,6 @@ const TESTDATA = "testdata"
 
 var testTarget = flag.String("target", "", "override test target")
 
-var testOnlyCurrentOS = flag.Bool("only-current-os", false, "")
-
 var supportedLinuxArches = map[string]string{
 	"AMD64Linux": "linux/amd64",
 	"X86Linux":   "linux/386",
@@ -160,51 +158,20 @@ func TestBuild(t *testing.T) {
 		return
 	}
 
-	if !*testOnlyCurrentOS {
-		t.Run("EmulatedCortexM3", func(t *testing.T) {
-			t.Parallel()
-			runPlatTests(optionsFromTarget("cortex-m-qemu", sema), tests, t)
-		})
+	t.Run("EmulatedCortexM3", func(t *testing.T) {
+		t.Parallel()
+		runPlatTests(optionsFromTarget("cortex-m-qemu", sema), tests, t)
+	})
 
-		t.Run("EmulatedRISCV", func(t *testing.T) {
-			t.Parallel()
-			runPlatTests(optionsFromTarget("riscv-qemu", sema), tests, t)
-		})
+	t.Run("EmulatedRISCV", func(t *testing.T) {
+		t.Parallel()
+		runPlatTests(optionsFromTarget("riscv-qemu", sema), tests, t)
+	})
 
-		t.Run("AVR", func(t *testing.T) {
-			t.Parallel()
-			runPlatTests(optionsFromTarget("simavr", sema), tests, t)
-		})
-
-		t.Run("WebAssembly", func(t *testing.T) {
-			t.Parallel()
-
-			runPlatTests(optionsFromTarget("wasm", sema), tests, t)
-			// Test with -gc=boehm.
-			t.Run("gc.go-boehm", func(t *testing.T) {
-				t.Parallel()
-				optionsBoehm := optionsFromTarget("wasm", sema)
-				optionsBoehm.GC = "boehm"
-				runTest("gc.go", optionsBoehm, t, nil, nil)
-			})
-		})
-		t.Run("WASIp1", func(t *testing.T) {
-			t.Parallel()
-			runPlatTests(optionsFromTarget("wasip1", sema), tests, t)
-
-			// Test with -gc=boehm.
-			t.Run("gc.go-boehm", func(t *testing.T) {
-				t.Parallel()
-				optionsBoehm := optionsFromTarget("wasip1", sema)
-				optionsBoehm.GC = "boehm"
-				runTest("gc.go", optionsBoehm, t, nil, nil)
-			})
-		})
-		t.Run("WASIp2", func(t *testing.T) {
-			t.Parallel()
-			runPlatTests(optionsFromTarget("wasip2", sema), tests, t)
-		})
-	}
+	t.Run("AVR", func(t *testing.T) {
+		t.Parallel()
+		runPlatTests(optionsFromTarget("simavr", sema), tests, t)
+	})
 
 	if runtime.GOOS == "linux" {
 		for name, osArch := range supportedLinuxArches {
@@ -224,13 +191,18 @@ func TestBuild(t *testing.T) {
 			options := optionsFromOSARCH("linux/mipsle/softfloat", sema)
 			runTest("cgo/", options, t, nil, nil)
 		})
-	} else if runtime.GOOS == "windows" {
-		if runtime.GOARCH != "386" {
-			t.Run("Windows386", func(t *testing.T) {
-				t.Parallel()
-				runPlatTests(optionsFromOSARCH("windows/386", sema), tests, t)
-			})
-		}
+		t.Run("WebAssembly", func(t *testing.T) {
+			t.Parallel()
+			runPlatTests(optionsFromTarget("wasm", sema), tests, t)
+		})
+		t.Run("WASI", func(t *testing.T) {
+			t.Parallel()
+			runPlatTests(optionsFromTarget("wasip1", sema), tests, t)
+		})
+		t.Run("WASIp2", func(t *testing.T) {
+			t.Parallel()
+			runPlatTests(optionsFromTarget("wasip2", sema), tests, t)
+		})
 	}
 }
 
@@ -424,12 +396,10 @@ func optionsFromOSARCH(osarch string, sema chan struct{}) compileopts.Options {
 }
 
 func runTest(name string, options compileopts.Options, t *testing.T, cmdArgs, environmentVars []string) {
-	t.Helper()
 	runTestWithConfig(name, t, options, cmdArgs, environmentVars)
 }
 
 func runTestWithConfig(name string, t *testing.T, options compileopts.Options, cmdArgs, environmentVars []string) {
-	t.Helper()
 	// Get the expected output for this test.
 	// Note: not using filepath.Join as it strips the path separator at the end
 	// of the path.
@@ -624,15 +594,6 @@ func TestWasmExport(t *testing.T) {
 			noOutput:  true, // wasm-unknown cannot produce output
 			command:   true,
 		},
-		// Test buildmode=wasi-legacy with WASI.
-		{
-			name:      "WASIp1-legacy",
-			target:    "wasip1",
-			buildMode: "wasi-legacy",
-			scheduler: "none",
-			file:      "wasmexport-noscheduler.go",
-			command:   true,
-		},
 	}
 
 	for _, tc := range tests {
@@ -705,10 +666,6 @@ func TestWasmExport(t *testing.T) {
 				// again.
 				checkResult("reentrantCall(2, 3)", mustCall(mod.ExportedFunction("reentrantCall").Call(ctx, 2, 3)), []uint64{5})
 				checkResult("reentrantCall(1, 8)", mustCall(mod.ExportedFunction("reentrantCall").Call(ctx, 1, 8)), []uint64{9})
-
-				// Check that goroutines started inside //go:wasmexport don't
-				// block the called function from returning.
-				checkResult("goroutineExit()", mustCall(mod.ExportedFunction("goroutineExit").Call(ctx)), nil)
 			}
 
 			// Add wasip1 module.
@@ -878,7 +835,6 @@ func TestWasmExit(t *testing.T) {
 
 // Check whether the output of a test equals the expected output.
 func checkOutput(t *testing.T, filename string, actual []byte) {
-	t.Helper()
 	expectedOutput, err := os.ReadFile(filename)
 	if err != nil {
 		t.Fatal("could not read output file:", err)
@@ -887,7 +843,6 @@ func checkOutput(t *testing.T, filename string, actual []byte) {
 }
 
 func checkOutputData(t *testing.T, expectedOutput, actual []byte) {
-	t.Helper()
 	expectedOutput = bytes.ReplaceAll(expectedOutput, []byte("\r\n"), []byte("\n"))
 	actual = bytes.ReplaceAll(actual, []byte("\r\n"), []byte("\n"))
 

monitor.go

@@ -35,8 +35,8 @@ func Monitor(executable, port string, config *compileopts.Config) error {
 		// Use the RTT interface, which is documented (in part) here:
 		// https://wiki.segger.com/RTT
 
-		// Try to find the "_SEGGER_RTT" symbol (machine.rttSerialInstance)
-		// symbol, which is the RTT control block.
+		// Try to find the "machine.rttSerialInstance" symbol, which is the RTT
+		// control block.
 		file, err := elf.Open(executable)
 		if err != nil {
 			return fmt.Errorf("could not open ELF file to determine RTT control block: %w", err)
@@ -48,7 +48,7 @@ func Monitor(executable, port string, config *compileopts.Config) error {
 		}
 		var address uint64
 		for _, symbol := range symbols {
-			if symbol.Name == "_SEGGER_RTT" {
+			if symbol.Name == "machine.rttSerialInstance" {
 				address = symbol.Value
 				break
 			}

src/crypto/rand/rand_baremetal.go

@@ -1,4 +1,4 @@
-//go:build nrf || (stm32 && !(stm32f103 || stm32l0x1)) || (sam && atsamd51) || (sam && atsame5x) || esp32c3 || tkey || (tinygo.riscv32 && virt)
+//go:build nrf || (stm32 && !(stm32f103 || stm32l0x1)) || (sam && atsamd51) || (sam && atsame5x) || esp32c3 || tkey
 
 // If you update the above build constraint, you'll probably also need to update
 // src/runtime/rand_hwrng.go.

src/crypto/rand/rand_windows.go

@@ -1,9 +1,6 @@
 package rand
 
-import (
-	"errors"
-	"unsafe"
-)
+import "errors"
 
 func init() {
 	Reader = &reader{}
@@ -19,22 +16,28 @@ func (r *reader) Read(b []byte) (n int, err error) {
 		return
 	}
 
-	// Use the old RtlGenRandom, introduced in Windows XP.
-	// Even though the documentation says it is deprecated, it is widely used
-	// and probably won't go away anytime soon.
-	// See for example: https://github.com/golang/go/issues/33542
-	// For Windows 7 and newer, we might switch to ProcessPrng in the future
-	// (which is a documented function and might be a tiny bit faster).
-	ok := libc_RtlGenRandom(unsafe.Pointer(&b[0]), len(b))
-	if !ok {
-		return 0, errRandom
+	var randomByte uint32
+	for i := range b {
+		// Call rand_s every four bytes because it's a C int (always 32-bit in
+		// Windows).
+		if i%4 == 0 {
+			errCode := libc_rand_s(&randomByte)
+			if errCode != 0 {
+				// According to the documentation, it can return an error.
+				return n, errRandom
+			}
+		} else {
+			randomByte >>= 8
+		}
+		b[i] = byte(randomByte)
 	}
+
 	return len(b), nil
 }
 
-// This function is part of advapi32.dll, and is called SystemFunction036 for
-// some reason. It's available on Windows XP and newer.
-// See: https://learn.microsoft.com/en-us/windows/win32/api/ntsecapi/nf-ntsecapi-rtlgenrandom
+// Cryptographically secure random number generator.
+// https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/rand-s?view=msvc-170
+// errno_t rand_s(unsigned int* randomValue);
 //
-//export SystemFunction036
-func libc_RtlGenRandom(buf unsafe.Pointer, len int) bool
+//export rand_s
+func libc_rand_s(randomValue *uint32) int32