GH-139922: Tail calling for MSVC (VS 2026) #1817
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| name: Tail calling interpreter | |
| on: | |
| pull_request: | |
| paths: | |
| - '.github/workflows/tail-call.yml' | |
| - 'Python/bytecodes.c' | |
| - 'Python/ceval.c' | |
| - 'Python/ceval_macros.h' | |
| - 'Python/generated_cases.c.h' | |
| push: | |
| paths: | |
| - '.github/workflows/tail-call.yml' | |
| - 'Python/bytecodes.c' | |
| - 'Python/ceval.c' | |
| - 'Python/ceval_macros.h' | |
| - 'Python/generated_cases.c.h' | |
| workflow_dispatch: | |
| permissions: | |
| contents: read | |
| concurrency: | |
| group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }} | |
| cancel-in-progress: true | |
| env: | |
| FORCE_COLOR: 1 | |
| jobs: | |
| tail-call: | |
| name: ${{ matrix.target }} | |
| runs-on: ${{ matrix.runner }} | |
| timeout-minutes: 90 | |
| strategy: | |
| fail-fast: false | |
| matrix: | |
| target: | |
| # Un-comment as we add support for more platforms for tail-calling interpreters. | |
| # - i686-pc-windows-msvc/msvc | |
| - x86_64-pc-windows-msvc/msvc | |
| # - aarch64-pc-windows-msvc/msvc | |
| - x86_64-apple-darwin/clang | |
| - aarch64-apple-darwin/clang | |
| - x86_64-unknown-linux-gnu/gcc | |
| - aarch64-unknown-linux-gnu/gcc | |
| - free-threading | |
| llvm: | |
| - 20 | |
| include: | |
| # - target: i686-pc-windows-msvc/msvc | |
| # architecture: Win32 | |
| # runner: windows-2022 | |
| - target: x86_64-pc-windows-msvc/msvc | |
| architecture: x64 | |
| runner: windows-2022 | |
| # - target: aarch64-pc-windows-msvc/msvc | |
| # architecture: ARM64 | |
| # runner: windows-2022 | |
| - target: x86_64-apple-darwin/clang | |
| architecture: x86_64 | |
| runner: macos-15-intel | |
| - target: aarch64-apple-darwin/clang | |
| architecture: aarch64 | |
| runner: macos-14 | |
| - target: x86_64-unknown-linux-gnu/gcc | |
| architecture: x86_64 | |
| runner: ubuntu-24.04 | |
| - target: aarch64-unknown-linux-gnu/gcc | |
| architecture: aarch64 | |
| runner: ubuntu-24.04-arm | |
| - target: free-threading | |
| architecture: x86_64 | |
| runner: ubuntu-24.04 | |
| steps: | |
| - uses: actions/checkout@v4 | |
| with: | |
| persist-credentials: false | |
| - uses: actions/setup-python@v5 | |
| with: | |
| python-version: '3.11' | |
| - name: Native Windows MSVC (release) | |
| if: runner.os == 'Windows' && matrix.architecture != 'ARM64' | |
| shell: cmd | |
| run: | | |
| choco install visualstudio2026buildtools -y --force --params "--add Microsoft.VisualStudio.Component.VC.Tools.x86.x64 --locale en-US --passive" | |
| set PATH=C:\Program Files (x86)\Microsoft Visual Studio\18\BuildTools\MSBuild\Current\bin;%PATH% | |
| call ./PCbuild/build.bat --tail-call-interp -c Release -p ${{ matrix.architecture }} "/p:PlatformToolset=v145" | |
| call ./PCbuild/rt.bat -p ${{ matrix.architecture }} -q --multiprocess 0 --timeout 4500 --verbose2 --verbose3 | |
| # No tests (yet): | |
| - name: Emulated Windows Clang (release) | |
| if: runner.os == 'Windows' && matrix.architecture == 'ARM64' | |
| shell: cmd | |
| run: | | |
| choco install llvm --allow-downgrade --no-progress --version ${{ matrix.llvm }}.1.0 | |
| set PlatformToolset=clangcl | |
| set LLVMToolsVersion=${{ matrix.llvm }}.1.0 | |
| set LLVMInstallDir=C:\Program Files\LLVM | |
| ./PCbuild/build.bat --tail-call-interp -p ${{ matrix.architecture }} | |
| - name: Native macOS (release) | |
| if: runner.os == 'macOS' | |
| run: | | |
| brew update | |
| brew install llvm@${{ matrix.llvm }} | |
| export SDKROOT="$(xcrun --show-sdk-path)" | |
| export PATH="/usr/local/opt/llvm@${{ matrix.llvm }}/bin:$PATH" | |
| export PATH="/opt/homebrew/opt/llvm@${{ matrix.llvm }}/bin:$PATH" | |
| CC=clang-20 ./configure --with-tail-call-interp | |
| make all --jobs 4 | |
| ./python.exe -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3 | |
| - name: Native Linux (debug) | |
| if: runner.os == 'Linux' && matrix.target != 'free-threading' | |
| run: | | |
| sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" ./llvm.sh ${{ matrix.llvm }} | |
| export PATH="$(llvm-config-${{ matrix.llvm }} --bindir):$PATH" | |
| CC=clang-20 ./configure --with-tail-call-interp --with-pydebug | |
| make all --jobs 4 | |
| ./python -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3 | |
| - name: Native Linux with free-threading (release) | |
| if: matrix.target == 'free-threading' | |
| run: | | |
| sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" ./llvm.sh ${{ matrix.llvm }} | |
| export PATH="$(llvm-config-${{ matrix.llvm }} --bindir):$PATH" | |
| CC=clang-20 ./configure --with-tail-call-interp --disable-gil | |
| make all --jobs 4 | |
| ./python -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3 |