build_llvm.yml

name: "Build LLVM and MLIR"

on:
  workflow_dispatch:
    inputs:
      force_debug_with_tmate:
        type: boolean
        description: 'Run the build with tmate session'
        required: false
        default: false
      debug_with_tmate:
        type: boolean
        description: 'Run the build with a tmate session ONLY in case of failure'
        required: false
        default: false
  pull_request:
    paths:
      - ".github/actions/setup_base"
      - ".github/workflows/build_llvm.yml"
      - "build_tools/cmake/llvm_cache.cmake"
      - "build_tools/cmake/llvm_wasm_cache.cmake"
      - "build_tools/build_llvm.sh"
      - "build_tools/build_llvm_wasi.sh"
      - "third_party/llvm-project"
  push:
    branches:
      - main
    paths:
      - "build_tools/cmake/llvm_cache.cmake"
      - "build_tools/cmake/llvm_wasm_cache.cmake"
      - "build_tools/build_llvm.sh"
      - "build_tools/build_llvm_wasi.sh"
      - "third_party/llvm-project"

concurrency:
  # A PR number if a pull request and otherwise the commit hash. This cancels
  # queued and in-progress runs for the same PR (presubmit) or commit
  # (postsubmit). The workflow name is prepended to avoid conflicts between
  # different workflows.
  group: ${{ github.workflow }}-${{ github.event.number || github.sha }}
  cancel-in-progress: true

jobs:
  build:

    strategy:
      fail-fast: false
      matrix:
        include:
          - name: "manylinux_x86_64"
            runs-on: "ubuntu-22.04"
            container: "quay.io/pypa/manylinux_2_28_x86_64"
            os: "almalinux"
            arch: x86_64
          - name: "wasm_wasi"
            runs-on: "ubuntu-22.04"
            container: "quay.io/pypa/manylinux_2_28_x86_64"
            os: "almalinux"
            arch: "wasm32-wasi"
          - name: "windows_x86_64"
            runs-on: "windows-2019"
            os: "windows"
            arch: x86_64
          - name: "macos_arm64"
            runs-on: "macos-14"
            os: "macos"
            arch: arm64
          - name: "macos_x86_64"
            runs-on: "macos-13"
            os: "macos"
            arch: x86_64

    runs-on: ${{ matrix.runs-on }}

    name: ${{ matrix.name }}

    defaults:
      run:
        shell: bash

    permissions:
      id-token: write
      contents: write

    env:
      # either the PR number or `branch-N` where N always increments
      cache-key: "mlir_${{ matrix.name }}_clang_${{ format('{0}-{1}', github.ref_name, github.run_number) }}"

    container:
      image: ${{ matrix.container }}

    steps:
      - name: "Check out repository"
        uses: actions/checkout@v4.2.2
        with:
          submodules: true

      - name: "Setup base"
        uses: ./.github/actions/setup_base
        id: setup_base
        with:
          cache-key: ${{ env.cache-key }}
          restore-key: "mlir_${{ matrix.name }}_clang"
          os: ${{ matrix.os }}
          arch: ${{ matrix.arch }}

      - name: "Build LLVM and MLIR"
        id: build
        run: |
          export LLVM_SOURCE_DIR="$PWD/third_party/llvm-project"
          export LLVM_BUILD_DIR="$PWD/llvm-build"
          # double nested so that upload artifacts uploads a folder 
          export LLVM_INSTALL_DIR="$PWD/llvm-install/llvm-install"
          
          ccache -z
          $python3_command -m pip install -r third_party/llvm-project/mlir/python/requirements.txt
          
          if [[ "${{ matrix.arch }}" == "wasm32-wasi" ]]; then
            build_tools/build_llvm_wasi.sh
          else
            build_tools/build_llvm.sh
            echo "*********************** SMOKE TEST *********************************"
            "$LLVM_INSTALL_DIR/bin/mlir-tblgen" --version
            echo "*********************** SMOKE TEST *********************************"
          fi
          ccache -s
          
          pushd $LLVM_SOURCE_DIR && LLVM_SHA_SHORT=$(git rev-parse --short HEAD) && popd
          tar -czf mlir_${{ matrix.name }}_$(date +'%Y%m%d')_$LLVM_SHA_SHORT.tar.gz -C "$LLVM_INSTALL_DIR/.." llvm-install
          rm -rf "$LLVM_BUILD_DIR" "$LLVM_SOURCE_DIR"

      - name: Upload artifacts
        uses: actions/upload-artifact@v4
        with:
          name: mlir_${{ matrix.name }}_artifact
          path: llvm-install
          if-no-files-found: warn

      - name: Release current commit
        if: ${{ !cancelled() && github.event_name == 'push' && github.ref_name == 'main' }}
        uses: ncipollo/release-action@v1.12.0
        with:
          artifacts: "*.tar.gz"
          token: "${{ secrets.GITHUB_TOKEN }}"
          tag: "latest"
          name: "latest"
          removeArtifacts: false
          allowUpdates: true
          replacesArtifacts: true
          makeLatest: true

      - name: "Save cache"
        uses: actions/cache/save@v3
        if: ${{ !cancelled() && github.event_name == 'push' && github.ref_name == 'main' }}
        with:
          path: ${{ steps.setup_base.outputs.cache-dir }}
          key: ${{ env.cache-key }}

      - name: "Setup tmate session"
        if: ${{ (failure() && inputs.debug_with_tmate) || inputs.force_debug_with_tmate }}
        uses: mxschmitt/action-tmate@v3.18
        with:
          limit-access-to-actor: true
          install-dependencies: ${{ startsWith(matrix.runs-on, 'macos') || startsWith(matrix.runs-on, 'windows') }}