name: LLVM Tests

permissions:
  contents: read

on:
  workflow_dispatch:
  push:
    branches:
      - 'release/**'
    paths:
      - 'llvm/**'
      - '.github/workflows/llvm-tests.yml'
      - '.github/workflows/llvm-project-tests.yml'
  pull_request:
    branches:
      - 'release/**'
    paths:
      - 'llvm/**'
      - '.github/workflows/llvm-tests.yml'
      - '.github/workflows/llvm-project-tests.yml'

concurrency:
  # Skip intermediate builds: always.
  # Cancel intermediate builds: only if it is a pull request build.
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}

jobs:
  check-all:
    if: github.repository_owner == 'llvm'
    name: Build and Test
    uses: ./.github/workflows/llvm-project-tests.yml
    with:
      build_target: check-all
      projects: clang;lld;libclc;lldb

  abi-dump-setup:
    if: github.repository_owner == 'llvm'
    runs-on: ubuntu-latest
    outputs:
      BASELINE_REF: ${{ steps.vars.outputs.BASELINE_REF }}
      ABI_HEADERS: ${{ steps.vars.outputs.ABI_HEADERS }}
      BASELINE_VERSION_MAJOR: ${{ steps.vars.outputs.BASELINE_VERSION_MAJOR }}
      BASELINE_VERSION_MINOR: ${{ steps.vars.outputs.BASELINE_VERSION_MINOR }}
      LLVM_VERSION_MAJOR: ${{ steps.version.outputs.major }}
      LLVM_VERSION_MINOR: ${{ steps.version.outputs.minor }}
      LLVM_VERSION_PATCH: ${{ steps.version.outputs.patch }}
    steps:
      - name: Checkout source
        uses: actions/checkout@v4
        with:
          fetch-depth: 250

      - name: Get LLVM version
        id: version
        uses: ./.github/workflows/get-llvm-version

      - name: Setup Variables
        id: vars
        run: |
          # C++ ABI:
          # 18.1.0 we aren't doing ABI checks.
          # 18.1.1 We want to check 18.1.0.
          # C ABI:
          # 18.1.0 We want to check 17.0.x
          # 18.1.1 We want to check 18.1.0
          echo "BASELINE_VERSION_MINOR=1" >> "$GITHUB_OUTPUT"
          if [ ${{ steps.version.outputs.patch }} -eq 0 ]; then
            {
              echo "BASELINE_VERSION_MAJOR=$(( ${{ steps.version.outputs.major }} - 1))"
              echo "ABI_HEADERS=llvm-c"
            } >> "$GITHUB_OUTPUT"
          else
            {
              echo "BASELINE_VERSION_MAJOR=${{ steps.version.outputs.major }}"
              echo "ABI_HEADERS=."
            } >> "$GITHUB_OUTPUT"
          fi

  abi-dump:
    if: github.repository_owner == 'llvm'
    needs: abi-dump-setup
    runs-on: ubuntu-latest
    strategy:
      matrix:
        name:
          - build-baseline
          - build-latest
        include:
          - name: build-baseline
            llvm_version_major: ${{ needs.abi-dump-setup.outputs.BASELINE_VERSION_MAJOR }}
            ref: llvmorg-${{ needs.abi-dump-setup.outputs.BASELINE_VERSION_MAJOR }}.${{ needs.abi-dump-setup.outputs.BASELINE_VERSION_MINOR }}.0
            repo: llvm/llvm-project
          - name: build-latest
            llvm_version_major: ${{ needs.abi-dump-setup.outputs.LLVM_VERSION_MAJOR }}
            ref: ${{ github.sha }}
            repo: ${{ github.repository }}
    steps:
      - name: Install Ninja
        uses: llvm/actions/install-ninja@main
      - name: Install abi-compliance-checker
        run: |
          sudo apt-get install abi-dumper autoconf pkg-config
      - name: Install universal-ctags
        run: |
          git clone https://github.com/universal-ctags/ctags.git
          cd ctags
          ./autogen.sh
          ./configure
          sudo make install
      - name: Download source code
        uses: llvm/actions/get-llvm-project-src@main
        with:
          ref: ${{ matrix.ref }}
          repo: ${{ matrix.repo }}
      - name: Configure
        run: |
          mkdir install
          cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Debug -DLLVM_TARGETS_TO_BUILD="" -DLLVM_BUILD_LLVM_DYLIB=ON -DCMAKE_C_FLAGS_DEBUG="-g1 -Og" -DCMAKE_CXX_FLAGS_DEBUG="-g1 -Og" -DCMAKE_INSTALL_PREFIX="$(pwd)"/install llvm
      - name: Build
        # Need to run install-LLVM twice to ensure the symlink is installed (this is a bug).
        run: |
          ninja -C build install-LLVM
          ninja -C build install-LLVM
          ninja -C build install-llvm-headers
      - name: Dump ABI
        run: |
          if [ "${{ needs.abi-dump-setup.outputs.ABI_HEADERS }}" = "llvm-c" ]; then
            nm ./install/lib/libLLVM.so | awk "/T _LLVM/ || /T LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" | cut -d ' ' -f 3 > llvm.symbols
            # Even though the -symbols-list option doesn't seem to filter out the symbols, I believe it speeds up processing, so I'm leaving it in.
            export EXTRA_ARGS="-symbols-list llvm.symbols"
          else
            touch llvm.symbols
          fi
          abi-dumper $EXTRA_ARGS -lver ${{ matrix.ref }} -skip-cxx -public-headers ./install/include/${{ needs.abi-dump-setup.outputs.ABI_HEADERS }} -o ${{ matrix.ref }}.abi ./install/lib/libLLVM.so
          # Remove symbol versioning from dumps, so we can compare across major versions.
          sed -i 's/LLVM_${{ matrix.llvm_version_major }}/LLVM_NOVERSION/' ${{ matrix.ref }}.abi
      - name: Upload ABI file
        uses: actions/upload-artifact@v3
        with:
          name: ${{ matrix.name }}
          path: ${{ matrix.ref }}.abi

      - name: Upload symbol list file
        if: matrix.name == 'build-baseline'
        uses: actions/upload-artifact@v3
        with:
          name: symbol-list
          path: llvm.symbols

  abi-compare:
    if: github.repository_owner == 'llvm'
    runs-on: ubuntu-latest
    needs:
      - abi-dump-setup
      - abi-dump
    steps:
      - name: Download baseline
        uses: actions/download-artifact@v3
        with:
          name: build-baseline
          path: build-baseline
      - name: Download latest
        uses: actions/download-artifact@v3
        with:
          name: build-latest
          path: build-latest
      - name: Download symbol list
        uses: actions/download-artifact@v3
        with:
          name: symbol-list
          path: symbol-list

      - name: Install abi-compliance-checker
        run: sudo apt-get install abi-compliance-checker
      - name: Compare ABI
        run: |
          if [ -s symbol-list/llvm.symbols ]; then
            # This option doesn't seem to work with the ABI dumper, so passing it here.
            export EXTRA_ARGS="-symbols-list symbol-list/llvm.symbols"
          fi
          # FIXME: Reading of gzip'd abi files on the GitHub runners stop
          # working some time in March of 2021, likely due to a change in the
          # runner's environment.
          abi-compliance-checker $EXTRA_ARGS -l libLLVM.so -old build-baseline/*.abi -new build-latest/*.abi || test "${{ needs.abi-dump-setup.outputs.ABI_HEADERS }}" = "llvm-c"
      - name: Upload ABI Comparison
        if: always()
        uses: actions/upload-artifact@v3
        with:
          name: compat-report-${{ github.sha }}
          path: compat_reports/
