[Workflows] Re-write release-binaries workflow (#89521)

This updates the release-binaries workflow so that the different build
stages are split across multiple jobs. This saves money by reducing the
time spent on the larger github runners and also makes it easier to
debug, because now it's possible to build a smaller release package
(with clang and lld) using only the free GitHub runners.

The workflow no longer uses the test-release.sh script but instead uses
the Release.cmake cache. This gives the workflow more flexibility and
ensures that the binary package will always be created even if the tests
fail.

This idea to split the stages comes from the "LLVM Precommit CI through
Github Actions" RFC:

https://discourse.llvm.org/t/rfc-llvm-precommit-ci-through-github-actions/76456

.github/workflows/release-binaries.yml

@@ -38,9 +38,6 @@ jobs:
     if: github.repository == 'llvm/llvm-project'
     outputs:
       release-version: ${{ steps.vars.outputs.release-version }}
-      flags: ${{ steps.vars.outputs.flags }}
-      build-dir: ${{ steps.vars.outputs.build-dir }}
-      rc-flags: ${{ steps.vars.outputs.rc-flags }}
       ref: ${{ steps.vars.outputs.ref }}
       upload: ${{ steps.vars.outputs.upload }}
 
@@ -85,17 +82,11 @@ jobs:
         fi
         bash .github/workflows/set-release-binary-outputs.sh "$tag" "$upload"
 
-  # Try to get around the 6 hour timeout by first running a job to fill
-  # the build cache.
-  fill-cache:
-    name: "Fill Cache ${{ matrix.os }}"
+  build-stage1-linux:
+    name: "Build Stage 1 Linux"
     needs: prepare
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-22.04
     if: github.repository == 'llvm/llvm-project'
-    strategy:
-      matrix:
-        os:
-          - ubuntu-22.04
     steps:
     - name: Checkout LLVM
       uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
@@ -109,81 +100,207 @@ jobs:
       uses: hendrikmuhs/ccache-action@ca3acd2731eef11f1572ccb126356c2f9298d35e # v1.2.9
       with:
         max-size: 250M
-        key: sccache-${{ matrix.os }}-release
+        key: sccache-${{ runner.os }}-release
         variant: sccache
 
-    - name: Build Clang
+    - name: Build Stage 1 Clang
       run: |
-        cmake -G Ninja -C clang/cmake/caches/Release.cmake -DCMAKE_C_COMPILER_LAUNCHER=sccache -DCMAKE_CXX_COMPILER_LAUNCHER=sccache -DCMAKE_POSITION_INDEPENDENT_CODE=ON -S llvm -B build
-        ninja -v -C build clang
+        sudo chown $USER:$USER /mnt/
+        cmake -G Ninja -C clang/cmake/caches/Release.cmake -DCMAKE_C_COMPILER_LAUNCHER=sccache -DCMAKE_CXX_COMPILER_LAUNCHER=sccache -S llvm -B /mnt/build
+        ninja -v -C /mnt/build
 
+    # We need to create an archive of the build directory, because it has too
+    # many files to upload.
+    - name: Package Build and Source Directories
+      run: |
+        tar -c . | zstd -T0 -c > llvm-project.tar.zst
+        tar -C /mnt/ -c build/ | zstd -T0 -c > build.tar.zst
 
-  build-binaries:
-    name: ${{ matrix.target.triple }}
-    permissions:
-      contents: write # To upload assets to release.
+    - name: Upload Stage 1 Source
+      uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 #v4.3.0
+      with:
+        name: stage1-source
+        path: llvm-project.tar.zst
+        retention-days: 2
+
+    - name: Upload Stage 1 Build Dir
+      uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 #v4.3.0
+      with:
+        name: stage1-build
+        path: build.tar.zst
+        retention-days: 2
+
+  build-stage2-linux:
+    name: "Build Stage 2 Linux"
     needs:
       - prepare
-      - fill-cache
-    runs-on: ${{ matrix.target.runs-on }}
+      - build-stage1-linux
+    runs-on: ubuntu-22.04
     if: github.repository == 'llvm/llvm-project'
-    strategy:
-      fail-fast: false
-      matrix:
-        target:
-          - triple: x86_64-linux-gnu-ubuntu-22.04
-            os: ubuntu-22.04
-            runs-on: ubuntu-22.04-16x64
-            debian-build-deps: >
-              chrpath
-              gcc-multilib
-              ninja-build
+    steps:
+    - name: Install Ninja
+      uses: llvm/actions/install-ninja@22e9f909d35b50bd1181709564bfe816eaeaae81 # main
+
+    - name: Download Stage 1 Artifacts
+      uses: actions/download-artifact@6b208ae046db98c579e8a3aa621ab581ff575935 # v4.1.1
+      with:
+        pattern: stage1-*
+        merge-multiple: true
+
+    - name: Unpack Artifacts
+      run: |
+        tar --zstd -xf llvm-project.tar.zst
+        rm llvm-project.tar.zst
+        sudo chown $USER:$USER /mnt/
+        tar --zstd -C /mnt -xf build.tar.zst
+        rm build.tar.zst
+
+    - name: Build Stage 2
+      run: |
+        ninja -C /mnt/build stage2-instrumented
+
+    # We need to create an archive of the build directory, because it has too
+    # many files to upload.
+    - name: Save Build and Source Directories
+      run: |
+        tar -c . | zstd -T0 -c > llvm-project.tar.zst
+        tar -C /mnt/ -c build/ | zstd -T0 -c > build.tar.zst
+
+    - name: Upload Stage 2 Source
+      uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 #v4.3.0
+      with:
+        name: stage2-source
+        path: ${{ github.workspace }}/llvm-project.tar.zst
+        retention-days: 2
+
+    - name: Upload Stage 2 Build Dir
+      uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 #v4.3.0
+      with:
+        name: stage2-build
+        path: ${{ github.workspace }}/build.tar.zst
+        retention-days: 2
+
+
+  build-stage3-linux:
+    name: "Build Stage 3 Linux"
+    needs:
+      - prepare
+      - build-stage2-linux
+    outputs:
+      filename: ${{ steps.package-info.outputs.release-filename }}
+    runs-on: ubuntu-22.04-16x64
+    if: github.repository == 'llvm/llvm-project'
+    steps:
+    - name: Install Ninja
+      uses: llvm/actions/install-ninja@22e9f909d35b50bd1181709564bfe816eaeaae81 # main
+
+    - name: 'Download artifact'
+      uses: actions/download-artifact@6b208ae046db98c579e8a3aa621ab581ff575935 # v4.1.1
+      with:
+        pattern: stage2-*
+        merge-multiple: true
+
+    - name: Unpack Artifact
+      run: |
+        tar --zstd -xf llvm-project.tar.zst
+        rm llvm-project.tar.zst
+        sudo chown $USER:$USER /mnt/
+        tar --zstd -C /mnt -xf build.tar.zst
+        rm build.tar.zst
+
+    - name: Build Release Package
+      run: |
+        ninja -C /mnt/build stage2-package
+
+    - id: package-info
+      run: |
+        filename="LLVM-${{ needs.prepare.outputs.release-version }}-Linux.tar.gz"
+        echo "filename=$filename" >> $GITHUB_OUTPUT
+        echo "path=/mnt/build/tools/clang/stage2-bins/$filename" >> $GITHUB_OUTPUT
+
+    - uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 #v4.3.0
+      if: always()
+      with:
+        name: release-binary
+        path: ${{ steps.package-info.outputs.path }}
+
+    # Clean up some build files to reduce size of artifact.
+    - name: Clean Up Build Directory
+      run: |
+        find /mnt/build -iname ${{ steps.package-info.outputs.filename }} -delete
+
+    # We need to create an archive of the build directory, because it has too
+    # many files to upload.
+    - name: Save Build and Source Directories
+      run: |
+        tar -c . | zstd -T0 -c > llvm-project.tar.zst
+        tar -C /mnt/ -c build/ | zstd -T0 -c > build.tar.zst
+
+    - name: Upload Stage 3 Source
+      uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 #v4.3.0
+      with:
+        name: stage3-source
+        path: llvm-project.tar.zst
+        retention-days: 2
+
+    - name: Upload Stage 3 Build Dir
+      uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 #v4.3.0
+      with:
+        name: stage3-build
+        path: build.tar.zst
+        retention-days: 2
+
+  upload-release-binaries-linux:
+    name: "Upload Linux Release Binaries"
+    needs:
+      - prepare
+      - build-stage3-linux
+    if : ${{ needs.prepare.outputs.upload == 'true' }}
+    runs-on: ubuntu-22.04
+    permissions:
+      contents: write # For release uploads
 
     steps:
-    - name: Checkout LLVM
-      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+    - name: 'Download artifact'
+      uses: actions/download-artifact@6b208ae046db98c579e8a3aa621ab581ff575935 # v4.1.1
       with:
-        ref: ${{ needs.prepare.outputs.ref }}
-        path: ${{ needs.prepare.outputs.build-dir }}/llvm-project
+        name: release-binary
 
-    - name: Setup sccache
-      uses: hendrikmuhs/ccache-action@ca3acd2731eef11f1572ccb126356c2f9298d35e # v1.2.9
-      with:
-        max-size: 250M
-        key: sccache-${{ matrix.target.os }}-release
-        save: false
-        variant: sccache
-
-    - name: Install Brew build dependencies
-      if: matrix.target.brew-build-deps != ''
-      run: brew install ${{ matrix.target.brew-build-deps }}
-
-    - name: Install Debian build dependencies
-      if: matrix.target.debian-build-deps != ''
-      run: sudo apt install ${{ matrix.target.debian-build-deps }}
-
-    - name: Set macOS build env variables
-      if: runner.os == 'macOS'
-      run: |
-        echo "MACOSX_DEPLOYMENT_TARGET=10.9" >> "$GITHUB_ENV"
-
-    - name: Build and test release
-      run: |
-        ${{ needs.prepare.outputs.build-dir }}/llvm-project/llvm/utils/release/test-release.sh \
-        ${{ needs.prepare.outputs.flags }} \
-        -triple ${{ matrix.target.triple }} \
-        -use-ninja \
-        -no-checkout \
-        -use-cmake-cache \
-        -no-test-suite \
-        -configure-flags "-DCMAKE_C_COMPILER_LAUNCHER=sccache -DCMAKE_CXX_COMPILER_LAUNCHER=sccache"
-
-    - name: Upload binaries
-      if: ${{ always() && needs.prepare.outputs.upload == 'true' }}
+    - name: Upload Release
       run: |
         sudo apt install python3-github
-        ${{ needs.prepare.outputs.build-dir }}/llvm-project/llvm/utils/release/github-upload-release.py \
+        ./llvm-project/llvm/utils/release/github-upload-release.py \
         --token ${{ github.token }} \
         --release ${{ needs.prepare.outputs.release-version }} \
         upload \
-        --files ${{ needs.prepare.outputs.build-dir }}/clang+llvm-${{ needs.prepare.outputs.release-version }}-${{ matrix.target.triple }}.tar.xz
+        --files ${{ needs.build-stage3-linux.outputs.release-filename }}
+
+
+  test-stage3-linux:
+    name: "Test Stage 3 Linux"
+    needs:
+      - prepare
+      - build-stage3-linux
+    runs-on: ubuntu-22.04
+    if: github.repository == 'llvm/llvm-project'
+    steps:
+    - name: Install Ninja
+      uses: llvm/actions/install-ninja@22e9f909d35b50bd1181709564bfe816eaeaae81 # main
+
+    - name: 'Download artifact'
+      uses: actions/download-artifact@6b208ae046db98c579e8a3aa621ab581ff575935 # v4.1.1
+      with:
+        pattern: stage3-*
+        merge-multiple: true
+
+    - name: Unpack Artifact
+      run: |
+        tar --zstd -xf llvm-project.tar.zst
+        rm llvm-project.tar.zst
+        sudo chown $USER:$USER /mnt/
+        tar --zstd -C /mnt -xf build.tar.zst
+        rm build.tar.zst
+
+    - name: Run Tests
+      run: |
+        ninja -C /mnt/build stage2-check-all

.github/workflows/set-release-binary-outputs.sh

@@ -15,10 +15,8 @@ if echo $tag | grep -e '^[0-9a-f]\+$'; then
   # This is a plain commit.
   # TODO: Don't hardcode this.
   release_version="18"
-  build_dir="$tag"
   upload='false'
   ref="$tag"
-  flags="-git-ref $tag -test-asserts"
 
 else
 
@@ -30,12 +28,7 @@ else
   fi
   release_version=`echo "$tag" | sed 's/llvmorg-//g'`
   release=`echo "$release_version" | sed 's/-.*//g'`
-  build_dir=`echo "$release_version" | sed 's,^[^-]\+,final,' | sed 's,[^-]\+-rc\(.\+\),rc\1,'`
-  rc_flags=`echo "$release_version" | sed 's,^[^-]\+,-final,' | sed 's,[^-]\+-rc\(.\+\),-rc \1 -test-asserts,' | sed 's,--,-,'`
-  flags="-release $release $rc_flags"
 fi
 echo "release-version=$release_version" >> $GITHUB_OUTPUT
-echo "build-dir=$build_dir" >> $GITHUB_OUTPUT
-echo "flags=$flags" >> $GITHUB_OUTPUT
 echo "upload=$upload" >> $GITHUB_OUTPUT
 echo "ref=$tag" >> $GITHUB_OUTPUT