build.yml

name: build
on: [push, pull_request]
jobs:
  build:
    name: ${{ matrix.name }}
    runs-on: ${{ matrix.os }}

    strategy:
      fail-fast: false
      matrix:
        include:
          - name: closure
            config: --enable-middle-end=closure
            os: ubuntu-latest
            ocamlparam: ''
            check_arch: true
            use_runtime: d
            ocamlrunparam: "v=0,V=1"

          - name: closure_cfg
            config: --enable-middle-end=closure --enable-poll-insertion
            os: ubuntu-latest
            ocamlparam: _,ocamlcfg=1

          - name: flambda1
            config: --enable-middle-end=flambda
            os: ubuntu-latest
            ocamlparam: ''

          - name: flambda1_frame_pointers
            config: --enable-middle-end=flambda --enable-frame-pointers --enable-poll-insertion
            os: ubuntu-latest
            ocamlparam: ''

          - name: flambda1_cfg
            config: --enable-middle-end=flambda --enable-poll-insertion
            os: ubuntu-latest
            ocamlparam: _,ocamlcfg=1

          - name: flambda2
            config: --enable-middle-end=flambda2
            os: ubuntu-latest
            ocamlparam: ''
            use_runtime: d
            ocamlrunparam: "v=0,V=1"

          - name: flambda2_frame_pointers
            config: --enable-middle-end=flambda2 --enable-frame-pointers --enable-poll-insertion
            os: ubuntu-latest
            ocamlparam: ''

          - name: flambda2_cfg
            config: --enable-middle-end=flambda2
            os: ubuntu-latest
            ocamlparam: _,ocamlcfg=1

          - name: flambda2_macos
            config: --enable-middle-end=flambda2
            os: macos-latest

          - name: irc
            config: --enable-middle-end=flambda2
            os: ubuntu-latest
            ocamlparam: ''
            check_arch: true
            register_allocator: irc
            irc_split: off
            irc_spilling_heuristics: flat_uses

          - name: build_upstream_closure
            config: --enable-middle-end=closure
            os: ubuntu-20.04

    env:
      J: "3"
      # On macOS, the testsuite is slow, so run only on push to main (#507)
      run_testsuite: "${{matrix.os != 'macos-latest' || (github.event_name == 'push' && github.event.ref == 'refs/heads/main')}}"
      build_upstream: "${{matrix.name == 'build_upstream_closure'}}"
      REGISTER_ALLOCATOR: "${{matrix.register_allocator}}"
      IRC_SPLIT: "${{matrix.irc_split}}"
      IRC_SPILLING_HEURISTICS: "${{matrix.irc_spilling_heuristics}}"

    steps:
    - name: Checkout the Flambda backend repo
      uses: actions/checkout@master
      with:
        path: 'flambda_backend'

    - name: Cache OCaml 4.14 and dune
      uses: actions/cache@v1
      id: cache
      with:
        path: ${{ github.workspace }}/ocaml-414/_install
        key: ${{ matrix.os }}-cache-ocaml-414-dune-361

    - name: Checkout OCaml 4.14
      uses: actions/checkout@master
      if: steps.cache.outputs.cache-hit != 'true'
      with:
        repository: 'ocaml/ocaml'
        path: 'ocaml-414'
        ref: '4.14'

    - name: Build OCaml 4.14
      if: steps.cache.outputs.cache-hit != 'true'
      working-directory: ocaml-414
      run: |
        ./configure --prefix=$GITHUB_WORKSPACE/ocaml-414/_install
        make -j $J world.opt
        make install
        # Remove unneeded parts to shrink cache file
        rm -rf $GITHUB_WORKSPACE/ocaml-414/_install/{lib/ocaml/compiler-libs,lib/ocaml/expunge,bin/*.byte}

    - name: Checkout dune github repo
      uses: actions/checkout@master
      if: steps.cache.outputs.cache-hit != 'true'
      with:
        repository: 'ocaml/dune'
        ref: '3.6.1'
        path: 'dune'

    - name: Build dune
      working-directory: dune
      if: steps.cache.outputs.cache-hit != 'true'
      run: |
        PATH=$GITHUB_WORKSPACE/ocaml-414/_install/bin:$PATH make release
        cp _boot/dune.exe $GITHUB_WORKSPACE/ocaml-414/_install/bin/dune

    - name: Install GNU parallel
      if: matrix.os == 'macos-latest'
      run: HOMEBREW_NO_INSTALL_CLEANUP=TRUE brew install parallel

    - name: Configure Flambda backend
      working-directory: flambda_backend
      run: |
        autoconf
        ./configure \
          --prefix=$GITHUB_WORKSPACE/_install \
          --with-dune=$GITHUB_WORKSPACE/ocaml-414/_install/bin/dune \
          ${{ matrix.config }}

    - name: Build, install and test Flambda backend
      working-directory: flambda_backend
      run: |
        if [ $run_testsuite = true ]; then target=ci; else target=compiler; fi
        export PATH=$GITHUB_WORKSPACE/ocaml-414/_install/bin:$PATH
        if [ $build_upstream = true ]; then make -j$J build_and_test_upstream; else make $target; fi
      env:
        BUILD_OCAMLPARAM: ${{ matrix.ocamlparam }}
        OCAMLRUNPARAM: ${{ matrix.ocamlrunparam }}
        USE_RUNTIME: ${{ matrix.use_runtime }}

    - name: Check other architectures
      working-directory: flambda_backend
      if: matrix.check_arch == true
      run: |
        PATH=$GITHUB_WORKSPACE/ocaml-414/_install/bin:$PATH make check_all_arches