Implement GitHub Actions for lint and buildAndTest

.clang-format

@@ -0,0 +1,2 @@
+BasedOnStyle: LLVM
+AlwaysBreakTemplateDeclarations: Yes

.github/actions/setup-build/action.yml

@@ -0,0 +1,42 @@
+# Copyright 2022 The StableHLO Authors.
+
+# The setup-build action gets everything needed by buildAndTest into the workspace.
+name: "Setup build environment (ninja, ccache, llvm, lld)"
+
+inputs:
+  llvm-version:
+    description: |
+      LLVM version for checkout and build. Used for ccache value and checkout.
+    required: true
+
+runs:
+  # This is a composite action - has a list of steps to execute.
+  using: "composite"
+
+  steps:
+  # Checkout llvm at version specified in input argument.
+  - uses: actions/checkout@v2
+    with:
+      repository: llvm/llvm-project
+      ref: ${{ inputs.llvm-version }}
+      path: llvm-project
+      fetch-depth: 1
+
+  # Get ninja for cmake build.
+  - name: Install Ninja
+    uses: llvm/actions/install-ninja@55d844821959226fab4911f96f37071c1d4c3268
+
+  # Get LLD - Improves build speed on Linux
+  - name: Install LLD
+    if: "runner.os == 'Linux'"
+    shell: bash
+    run: |
+      sudo apt-get install -y lld
+
+  # Setup C++ caching using ccache.
+  # Cache key is a combination of OS arch and LLVM version.
+  - name: Ccache for C++ compilation
+    uses: hendrikmuhs/[email protected]
+    with:
+      key: ${{ runner.os }}-stablehlo_build_assets-${{ inputs.llvm-version }}
+      max-size: 4G

.github/workflows/buildAndTest.yml

@@ -0,0 +1,60 @@
+# Copyright 2022 The StableHLO Authors.
+
+name: Build and Test
+
+on:
+  pull_request:
+    branches: [ main ]
+  push:
+    branches: [ main ]
+  schedule:
+    # Run buildAndTest workflow once a day
+    - cron:  '* 12 * * *'
+  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
+
+# Build using CMake and run tests.
+# Use Cached LLVM to improve build times.
+jobs:
+  build-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os-arch: [ubuntu-x86_64]
+        include:
+          - os-arch: ubuntu-x86_64
+            os: ubuntu-22.04
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Checkout StableHLO
+      uses: actions/checkout@v2
+
+    # Read LLVM version from `build_tools/llvm_version.txt`
+    - name: Get LLVM Version
+      id: llvm-version
+      shell: bash
+      run: |
+        echo "::set-output name=version::$(cat ${{ github.workspace }}/build_tools/llvm_version.txt)"
+
+    # Check out LLVM, and install tools for compilation 
+    - name: Setup workspace
+      uses: ./.github/actions/setup-build
+      with:
+        llvm-version: ${{ steps.llvm-version.outputs.version }}
+
+    - name: Configure and Build LLVM os-arch='${{ matrix.os-arch }}'
+      shell: bash
+      run: |
+        ./build_tools/github_actions/ci_build_llvm.sh "$GITHUB_WORKSPACE/llvm-project/" "$GITHUB_WORKSPACE/llvm-build"
+
+    - name: Build and Test StableHLO os-arch='${{ matrix.os-arch }}'
+      run: |
+        ./build_tools/github_actions/ci_build_stablehlo.sh "$GITHUB_WORKSPACE/llvm-build" "$GITHUB_WORKSPACE/stablehlo-build"

.github/workflows/lint.yml

@@ -0,0 +1,25 @@
+# Copyright 2022 The StableHLO Authors.
+
+name: Lint
+
+on: [pull_request]
+
+jobs:
+  clang-format:
+    # This job can only be run on pull_request since GITHUB_BASE_REF is only set on PR.
+    if: "github.event_name == 'pull_request'"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Installing dependencies
+        run: |
+          wget https://raw.githubusercontent.com/llvm-mirror/clang/master/tools/clang-format/git-clang-format -O /tmp/git-clang-format
+          chmod +x /tmp/git-clang-format
+      - name: Checking out repository
+        uses: actions/checkout@v2
+      - name: Fetching Base Branch
+        # We have to explicitly fetch the base branch as well
+        run: git fetch --no-tags --prune --depth=1 origin "${GITHUB_BASE_REF?}:${GITHUB_BASE_REF?}"
+      - name: Running clang-format on changed source files
+        run: |
+          /tmp/git-clang-format "${GITHUB_BASE_REF?}" --style=google
+          git diff --exit-code

build_tools/github_actions/ci_build_llvm.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+# Copyright 2020 The TensorFlow Authors. All Rights Reserved.
+# Copyright 2022 The StableHLO Authors.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This file is similar to build_mlir.sh, but passes different flags for
+# caching in GitHub Actions to improve build speeds.
+
+if [[ $# -ne 2 ]] ; then
+  echo "Usage: $0 <path/to/llvm> <build_dir>"
+  exit 1
+fi
+
+# LLVM source
+LLVM_SRC_DIR="$1"
+LLVM_BUILD_DIR="$2"
+
+# Configure LLVM
+cmake -GNinja \
+  "-H$LLVM_SRC_DIR/llvm" \
+  "-B$LLVM_BUILD_DIR" \
+  -DLLVM_INSTALL_UTILS=ON \
+  -DLLVM_ENABLE_LLD=ON \
+  -DLLVM_ENABLE_PROJECTS=mlir \
+  -DLLVM_TARGETS_TO_BUILD="X86;NVPTX;AMDGPU" \
+  -DLLVM_INCLUDE_TOOLS=ON \
+  -DLLVM_ENABLE_BINDINGS=OFF \
+  -DLLVM_BUILD_TOOLS=OFF \
+  -DLLVM_INCLUDE_TESTS=OFF \
+  -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+  -DLLVM_ENABLE_ASSERTIONS=On \
+  -DCMAKE_CXX_COMPILER=clang++ \
+  -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
+  -DCMAKE_C_COMPILER=clang \
+  -DCMAKE_C_COMPILER_LAUNCHER=ccache
+
+# Build LLVM/MLIR
+cmake --build "$LLVM_BUILD_DIR" --target all --target mlir-cpu-runner

build_tools/github_actions/ci_build_stablehlo.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+# Copyright 2020 The TensorFlow Authors. All Rights Reserved.
+# Copyright 2022 The StableHLO Authors.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This file is similar to build_mlir.sh, but passes different flags for
+# caching in GitHub Actions.
+
+# This file gets called on build directory where resources are placed
+# during `ci_configure`, and builds stablehlo in the directory specified
+# by the second argument.
+
+if [[ $# -ne 2 ]] ; then
+  echo "Usage: $0 <llvm_build_dir> <stablehlo_build_dir>"
+  exit 1
+fi
+
+LLVM_BUILD_DIR="$1"
+STABLEHLO_BUILD_DIR="$2"
+
+# Configure StableHLO
+cmake -GNinja \
+  -B"$STABLEHLO_BUILD_DIR" \
+  -DLLVM_ENABLE_LLD=ON \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DLLVM_ENABLE_ASSERTIONS=On \
+  -DMLIR_DIR="$LLVM_BUILD_DIR/lib/cmake/mlir" \
+  -DCMAKE_CXX_COMPILER=clang++ \
+  -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
+  -DCMAKE_C_COMPILER=clang \
+  -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+
+# Build and Check StableHLO
+cd "$STABLEHLO_BUILD_DIR"
+ninja check-stablehlo

stablehlo/dialect/StablehloOps.cpp

@@ -1855,8 +1855,7 @@ LogicalResult verifyCollectivePermuteSourceTargetPairs(
 }
 
 LogicalResult CollectivePermuteOp::verify() {
-  return verifyCollectivePermuteSourceTargetPairs(*this,
-                                                       source_target_pairs());
+  return verifyCollectivePermuteSourceTargetPairs(*this, source_target_pairs());
 }
 
 //===----------------------------------------------------------------------===//