Merge branch 'sycl' into atomic_querries

# Conflicts:
#	sycl/include/CL/sycl/info/info_desc.hpp

.github/CODEOWNERS

@@ -34,15 +34,15 @@ sycl/include/sycl/ext/intel/sub_group.hpp @Pennycook @AlexeySachkov
 sycl/include/sycl/ext/intel/sub_group_host.hpp @Pennycook @AlexeySachkov
 
 # PI API
-sycl/include/CL/sycl/detail/pi.def @smaslov-intel @againull
-sycl/include/CL/sycl/detail/pi.h   @smaslov-intel @againull
-sycl/include/CL/sycl/detail/pi.hpp @smaslov-intel @againull
-sycl/include/CL/sycl/detail/pi* @smaslov-intel @againull
-sycl/plugins/ @smaslov-intel @againull
-sycl/source/detail/pi.cpp @smaslov-intel @againull
-sycl/source/detail/plugin.hpp @smaslov-intel @againull
-sycl/source/detail/posix_pi.cpp @smaslov-intel @againull
-sycl/source/detail/windows_pi.cpp @smaslov-intel @againull
+sycl/include/CL/sycl/detail/pi.def @smaslov-intel
+sycl/include/CL/sycl/detail/pi.h   @smaslov-intel
+sycl/include/CL/sycl/detail/pi.hpp @smaslov-intel
+sycl/include/CL/sycl/detail/pi* @smaslov-intel
+sycl/plugins/ @smaslov-intel
+sycl/source/detail/pi.cpp @smaslov-intel
+sycl/source/detail/plugin.hpp @smaslov-intel
+sycl/source/detail/posix_pi.cpp @smaslov-intel
+sycl/source/detail/windows_pi.cpp @smaslov-intel
 
 # ESIMD CPU emulator plug-in
 sycl/plugins/esimd_cpu/ @kbobrovs @smaslov-intel

.github/workflows/repo-lockdown.yml

@@ -0,0 +1,19 @@
+name: 'Repo Lockdown'
+on:
+  pull_request_target:
+    types: opened
+
+permissions:
+  pull-requests: write
+
+jobs:
+  action:
+    runs-on: ubuntu-latest
+    if: github.repository == 'llvm/llvm-project'
+    steps:
+      - uses: dessant/repo-lockdown@v2
+        with:
+          process-only: 'prs'
+          pr-comment: >
+            This repository does not accept pull requests.
+            Please follow http://llvm.org/docs/Contributing.html#how-to-submit-a-patch for contribution to LLVM.

.github/workflows/sycl_linux_build_and_test.yml

@@ -0,0 +1,162 @@
+name: Reusable SYCL Linux build and test workflow
+
+on:
+  pull_request:
+    paths:
+    - '.github/workflows/sycl_linux_build_and_test.yml'
+  workflow_call:
+    inputs:
+      cc:
+        type: string
+        required: false
+        default: "gcc"
+      cxx:
+        type: string
+        required: false
+        default: "g++"
+      build_image:
+        type: string
+        required: false
+        default: "ghcr.io/intel/llvm/ubuntu2004_base:latest"
+      build_runs_on:
+        type: string
+        required: false
+        default: "ubuntu-latest"
+      build_github_cache:
+        type: boolean
+        required: false
+        default: false
+      build_cache_root:
+        type: string
+        required: true
+      build_cache_suffix:
+        type: string
+        required: false
+        default: "default"
+      build_cache_size:
+        type: string
+        required: false
+        default: 2G
+      build_configure_extra_args:
+        type: string
+        required: false
+        default: ""
+      build_artifact_suffix:
+        type: string
+        required: true
+
+jobs:
+  configure:
+    name: Pre-build configuration
+    runs-on: ubuntu-latest
+    outputs:
+      params: ${{ steps.input-parameters.outputs.params }}
+    steps:
+      - id: input-parameters
+        env:
+          INPUTS: ${{ toJSON(inputs) }}
+        run: |
+          if [[ "$GITHUB_EVENT_NAME" != "workflow_call" ]]; then
+            INPUTS="{
+              \"cc\":\"gcc\",
+              \"cxx\":\"g++\",
+              \"build_runs_on\":\"sycl-precommit-linux\",
+              \"build_image\":\"ghcr.io/intel/llvm/ubuntu2004_base:latest\",
+              \"build_github_cache\":\"false\",
+              \"build_cache_root\":\"/__w/\",
+              \"build_cache_suffix\":\"default\",
+              \"build_cache_size\":\"2G\",
+              \"build_configure_extra_args\":\"\",
+              \"build_artifact_suffix\":\"default\",
+              \"build_upload_artifact\":\"false\"
+            }"
+          fi
+          INPUTS="${INPUTS//'%'/'%25'}"
+          INPUTS="${INPUTS//$'\n'/'%0A'}"
+          INPUTS="${INPUTS//$'\r'/'%0D'}"
+          echo "::set-output name=params::$INPUTS"
+          echo "$INPUTS"
+  build:
+    name: Build SYCL toolchain
+    needs: configure
+    runs-on: ${{ fromJSON(needs.configure.outputs.params).build_runs_on }}
+    container:
+      image: ${{ fromJSON(needs.configure.outputs.params).build_image }}
+      options: -u 1001:1001
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        path: src
+    - name: Setup Cache
+      uses: actions/cache@v2
+      if: ${{ steps.parameters.build_github_cache }}
+      id: cache
+      with:
+        path: ${{ fromJSON(needs.configure.outputs.params).build_cache_root }}/build_cache_${{ fromJSON(needs.configure.outputs.params).build_cache_suffix }}
+        key: sycl-build-${{ fromJSON(needs.configure.outputs.params).build_cache_suffix }}-${{ github.sha }}
+        restore-keys: |
+          sycl-build-${{ fromJSON(needs.configure.outputs.params).build_cache_suffix }}-
+    - name: Configure
+      env:
+        CC: ${{ fromJSON(needs.configure.outputs.params).cc }}
+        CXX: ${{ fromJSON(needs.configure.outputs.params).cxx }}
+        CACHE_ROOT: ${{ fromJSON(needs.configure.outputs.params).build_cache_root }}
+        CACHE_SUFFIX: ${{ fromJSON(needs.configure.outputs.params).build_cache_suffix }}
+        CACHE_SIZE: ${{ fromJSON(needs.configure.outputs.params).build_cache_size }}
+        ARGS: ${{ fromJSON(needs.configure.outputs.params).build_configure_extra_args }}
+      run: |
+        mkdir -p $CACHE_ROOT/build_cache_$CACHE_SUFFIX
+        mkdir -p $GITHUB_WORKSPACE/build
+        cd $GITHUB_WORKSPACE/build
+        python3 $GITHUB_WORKSPACE/src/buildbot/configure.py -w $GITHUB_WORKSPACE \
+          -s $GITHUB_WORKSPACE/src -o $GITHUB_WORKSPACE/build -t Release \
+          --ci-defaults $ARGS --cmake-opt="-DLLVM_CCACHE_BUILD=ON" \
+          --cmake-opt="-DLLVM_CCACHE_DIR=$CACHE_ROOT/build_cache_$CACHE_SUFFIX" \
+          --cmake-opt="-DLLVM_CCACHE_MAXSIZE=$CACHE_SIZE"
+    - name: Compile
+      run: cmake --build $GITHUB_WORKSPACE/build
+    # TODO allow to optionally disable in-tree checks
+    - name: check-llvm
+      if: always()
+      run: |
+        cmake --build $GITHUB_WORKSPACE/build --target check-llvm
+    - name: check-clang
+      if: always()
+      run: |
+        export XDG_CACHE_HOME=$GITHUB_WORKSPACE/os_cache
+        cmake --build $GITHUB_WORKSPACE/build --target check-clang
+    - name: check-sycl
+      if: always()
+      run: |
+        cmake --build $GITHUB_WORKSPACE/build --target check-sycl
+    - name: check-llvm-spirv
+      if: always()
+      run: |
+        cmake --build $GITHUB_WORKSPACE/build --target check-llvm-spirv
+    - name: check-xptifw
+      if: always()
+      run: |
+        cmake --build $GITHUB_WORKSPACE/build --target check-xptifw
+    - name: Install
+      # TODO replace utility installation with a single CMake target
+      run: |
+        cmake --build $GITHUB_WORKSPACE/build --target deploy-sycl-toolchain
+        cmake --build $GITHUB_WORKSPACE/build --target utils/FileCheck/install
+        cmake --build $GITHUB_WORKSPACE/build --target utils/count/install
+        cmake --build $GITHUB_WORKSPACE/build --target utils/not/install
+        cmake --build $GITHUB_WORKSPACE/build --target utils/lit/install
+        cmake --build $GITHUB_WORKSPACE/build --target utils/llvm-lit/install
+        cmake --build $GITHUB_WORKSPACE/build --target install-clang-format
+        cmake --build $GITHUB_WORKSPACE/build --target install-clang-tidy
+
+    - name: Pack
+      run: tar -cJf llvm_sycl.tar.xz -C $GITHUB_WORKSPACE/build/install .
+    - name: Upload artifacts
+      uses: actions/upload-artifact@v1
+      with:
+        name: sycl_linux_${{ fromJSON(needs.configure.outputs.params).build_artifact_suffix }}
+        path: llvm_sycl.tar.xz
+    - name: Cleanup
+      if: always()
+      run: rm -rf $GITHUB_WORKSPACE/*
+