name: Build and Test

on:
  pull_request:
    branches: [ main ]
  push:
    branches: [ main ]
  workflow_dispatch:

# Ensure that only a single job or workflow using the same
# concurrency group will run at a time. This would cancel
# any in-progress jobs in the same github workflow and github
# ref (e.g. refs/heads/main or refs/pull/<pr_number>/merge).
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true


# Provisioned Jobs:
# ubuntu/docker - x86_64 - llvm in-tree     - pytorch binary - build+test    # most used dev flow and fastest signal
# ubuntu/docker - x86_64 - llvm out-of-tree - pytorch source - build+test    # most elaborate build
# macos  - arm64  - llvm in-tree     - pytorch binary - build only    # cross compile, can't test arm64
jobs:
  build-test:
    strategy:
      fail-fast: true
      matrix:
        os-arch: [ubuntu-x86_64, macos-arm64, windows-x86_64]
        llvm-build: [in-tree, out-of-tree]
        torch-binary: [ON, OFF]
        torch-version: [nightly, stable]
        exclude:
          # Exclude llvm in-tree and pytorch source
          - llvm-build: in-tree
            torch-binary: OFF
          # Exclude llvm out-of-tree and pytorch source
          - llvm-build: out-of-tree
            torch-binary: OFF
          # Exclude macos-arm64 and llvm out-of-tree altogether
          - os-arch: macos-arm64
            llvm-build: out-of-tree
          - os-arch: macos-arm64
            torch-version: stable
          - os-arch: windows-x86_64
            llvm-build: out-of-tree
          - os-arch: windows-x86_64
            torch-version: stable
          # For PyTorch stable builds, we don't build PyTorch from source
          - torch-version: stable
            torch-binary: OFF
        include:
          # Specify OS versions
          - os-arch: ubuntu-x86_64
            os: a100
          - os-arch: macos-arm64
            os: macos-latest
          - os-arch: windows-x86_64
            os: windows-latest
    runs-on: ${{ matrix.os }}

    steps:
    
    - name: Prepare workspace
      if: ${{ matrix.os-arch == 'ubuntu-x86_64' }}
      run: |
        # Clear the workspace directory so that we don't run into errors about
        # existing lock files.
        sudo rm -rf $GITHUB_WORKSPACE/*
    
    - name: Checkout torch-mlir
      uses: actions/checkout@v3
      with:
        submodules: 'true'
        fetch-depth: 0

    - name: Fetch PyTorch commit hash
      if: ${{ matrix.os-arch != 'windows-x86_64' }}
      run: |
        PT_HASH="$(cat ${GITHUB_WORKSPACE}/pytorch-hash.txt)"
        echo "PT_HASH=${PT_HASH}" >> ${GITHUB_ENV}

    - name: Setup ccache
      uses: ./.github/actions/setup-build
      with:
        cache-suffix: 'build-${{ matrix.llvm-build }}-${{ matrix.torch-version }}'
        torch-version: ${{ matrix.torch-version }}

    - name: Set up Visual Studio shell
      if: ${{ matrix.os-arch == 'windows-x86_64' }}
      uses: egor-tensin/vs-shell@v2
      with:
        arch: x64

    - name: Try to Restore PyTorch Build Cache
      if: ${{ matrix.torch-binary == 'OFF' }}
      id: cache-pytorch
      uses: actions/cache/restore@v3
      with:
        path: ${{ github.workspace }}/build_tools/python_deploy/wheelhouse
        key: ${{ runner.os }}-pytorch-${{ env.PT_HASH }}

    - name: Build and Test os-arch='ubuntu-x86_64' llvm-build='${{ matrix.llvm-build }}' torch-binary='${{ matrix.torch-binary }}'
      if: ${{ matrix.os-arch == 'ubuntu-x86_64' }}
      run: |
        cd $GITHUB_WORKSPACE
        TORCH_MLIR_SRC_PYTORCH_BRANCH="$(cat pytorch-hash.txt)" \
        TM_PACKAGES="${{ matrix.llvm-build }}" \
        TM_USE_PYTORCH_BINARY="${{ matrix.torch-binary }}" \
        TM_PYTORCH_INSTALL_WITHOUT_REBUILD="${{ steps.cache-pytorch.outputs.cache-hit }}" \
        TM_TORCH_VERSION="${{ matrix.torch-version }}" \
        ./build_tools/python_deploy/build_linux_packages.sh

    - name: Configure os-arch='macos-arm64' llvm-build='in-tree' torch-binary='${{ matrix.torch-binary }}'
      # cross compile, can't test arm64
      if: ${{ matrix.os-arch == 'macos-arm64' && matrix.llvm-build == 'in-tree' }}
      run: |
        # TODO: Reenable LTC after build on macOS-arm64 is fixed (https://github.com/llvm/torch-mlir/issues/1253)
        cmake -GNinja -Bbuild_arm64 \
          -DCMAKE_BUILD_TYPE=Release \
          -DCMAKE_C_COMPILER=clang \
          -DCMAKE_CXX_COMPILER=clang++ \
          -DCMAKE_C_COMPILER_LAUNCHER=ccache \
          -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
          -DCMAKE_LINKER=lld \
          -DCMAKE_OSX_ARCHITECTURES=arm64 \
          -DLLVM_ENABLE_ASSERTIONS=ON \
          -DLLVM_ENABLE_PROJECTS=mlir \
          -DLLVM_EXTERNAL_PROJECTS="torch-mlir" \
          -DLLVM_EXTERNAL_TORCH_MLIR_SOURCE_DIR="$GITHUB_WORKSPACE" \
          -DLLVM_TARGETS_TO_BUILD=AArch64 \
          -DLLVM_USE_HOST_TOOLS=ON \
          -DLLVM_ENABLE_ZSTD=OFF \
          -DMLIR_ENABLE_BINDINGS_PYTHON=ON \
          -DTORCH_MLIR_ENABLE_STABLEHLO=OFF \
          -DTORCH_MLIR_ENABLE_LTC=OFF \
          -DTORCH_MLIR_USE_INSTALLED_PYTORCH="${{ matrix.torch-binary }}" \
          -DMACOSX_DEPLOYMENT_TARGET=12.0 \
          -DPython3_EXECUTABLE="$(which python)" \
          $GITHUB_WORKSPACE/externals/llvm-project/llvm

    - name: Build torch-mlir (cross-compile)
      if: ${{ matrix.os-arch == 'macos-arm64' }}
      run: |
        cmake --build build_arm64

    - name: Build (Windows)
      if: ${{ matrix.os-arch == 'windows-x86_64' }}
      shell: bash
      run: ./build_tools/python_deploy/build_windows_ci.sh

    - name: Save PyTorch Build Cache
      if: ${{ github.ref_name == 'main' && matrix.torch-binary == 'OFF' }}
      uses: actions/cache/save@v3
      with:
        path: ${{ github.workspace }}/build_tools/python_deploy/wheelhouse
        key: ${{ runner.os }}-pytorch-${{ env.PT_HASH }}

    - name: Print ccache statistics
      shell: bash
      run: ccache --show-stats