[CI] Use ccache when prebuilding tests

.github/workflows/sycl-linux-build.yml

@@ -280,6 +280,8 @@ jobs:
         binaries_artifact: ${{ inputs.e2e_binaries_artifact }}
         cxx_compiler: $GITHUB_WORKSPACE/toolchain/bin/clang++
         extra_lit_opts: --param sycl_build_targets="spir;nvidia;amd"
+        build_cache_root: ${{ inputs.build_cache_root }}
+        build_cache_suffix: "${{ inputs.build_cache_suffix }}_e2e"
 
     - name: Remove E2E tests before spirv-backend run
       if: ${{ inputs.e2e_binaries_artifact && always() && !cancelled() && steps.build.conclusion == 'success' }}
@@ -295,3 +297,5 @@ jobs:
         binaries_artifact: ${{ inputs.e2e_binaries_artifact }}_spirv_backend
         cxx_compiler: $GITHUB_WORKSPACE/toolchain/bin/clang++
         extra_lit_opts: --param spirv-backend=True
+        build_cache_root: ${{ inputs.build_cache_root }}
+        build_cache_suffix: "${{ inputs.build_cache_suffix }}_e2e_spv"

devops/actions/run-tests/e2e/action.yml

@@ -17,7 +17,12 @@ inputs:
     required: false
   cxx_compiler:
     required: false
-
+  build_cache_root:
+    required: false
+  build_cache_suffix:
+    type: string
+    required: false
+    default: "default"
 
 runs:
   using: "composite"
@@ -48,18 +53,38 @@ runs:
     env:
       CMAKE_EXTRA_ARGS: ${{ inputs.extra_cmake_args }}
     run: |
+      CMPLR="${{ inputs.cxx_compiler || '$(which clang++)'}}"
       if [ -n "$CMAKE_EXTRA_ARGS" ]; then
         echo "opts=$CMAKE_EXTRA_ARGS" >> $GITHUB_OUTPUT
       fi
+      if [ -n "${{ inputs.build_cache_root }}" ]; then
+       CCACHE_PATH="$(dirname $CMPLR)"
+       echo "CCACHE_COMPILER=clang++" >> $GITHUB_ENV
+       echo "CCACHE_PATH=$CCACHE_PATH/real" >> $GITHUB_ENV
+       echo "CCACHE_DIR=${{ inputs.build_cache_root }}/build_cache_${{ inputs.build_cache_suffix }}" >> $GITHUB_ENV
+       echo "CCACHE_MAXSIZE=5G" >> $GITHUB_ENV
+       if [ ! -f "$CCACHE_PATH/real/clang++" ]; then
+        # sudo ln -s "$(which ccache)" "$CMPLR"
+        mkdir -p "$CCACHE_PATH/real"
+        ln -s "$CCACHE_PATH/clang" "$CCACHE_PATH/real/clang++"
+        rm "$CMPLR"
+        ln -s "$(which ccache)" "$CMPLR"
+       fi
+       DPCPP_PATH="$(dirname $CCACHE_PATH)"
+       echo "dpcpp_path=$DPCPP_PATH" >> $GITHUB_OUTPUT
+       mkdir -p $CCACHE_DIR
+      fi
+      #todo fix dpcpp_path when not using ccache
+      echo "CMPLR=$CMPLR" >> $GITHUB_ENV
   - name: Configure E2E tests
     if: inputs.testing_mode != 'run-only'
     shell: bash
     run: |
-      cmake -GNinja -B./build-e2e -S./llvm/sycl/test-e2e -DCMAKE_CXX_COMPILER="${{ inputs.cxx_compiler || '$(which clang++)'}}" -DLLVM_LIT="$PWD/llvm/llvm/utils/lit/lit.py" ${{ steps.cmake_opts.outputs.opts }}
+      ls -la /__w/llvm/llvm/toolchain/bin/real  
+      cmake -GNinja -B./build-e2e -S./llvm/sycl/test-e2e -DCMAKE_CXX_COMPILER="$CMPLR" -DLLVM_LIT="$PWD/llvm/llvm/utils/lit/lit.py" ${{ steps.cmake_opts.outputs.opts }}
+      echo "LIT_OPTS=-v --no-progress-bar --show-unsupported --show-pass --show-xfail --max-time 3600 --time-tests --param print_features=True --param test-mode=${{ inputs.testing_mode }} --param sycl_devices=${{ inputs.target_devices }} --param dpcpp_path=${{ steps.cmake_opts.outputs.dpcpp_path }}" >> $GITHUB_ENV
   - name: SYCL End-to-end tests
     shell: bash {0}
-    env:
-      LIT_OPTS: -v --no-progress-bar --show-unsupported --show-pass --show-xfail --max-time 3600 --time-tests --param print_features=True --param test-mode=${{ inputs.testing_mode }} --param sycl_devices=${{ inputs.target_devices }} ${{ inputs.extra_lit_opts }}
     run: |
       ninja -C build-e2e check-sycl-e2e > e2e.log 2>&1
       exit_code=$?

sycl/test-e2e/lit.cfg.py

@@ -536,6 +536,8 @@ def open_check_file(file_name):
 lit_config.note("Targeted devices: {}".format(", ".join(config.sycl_devices)))
 
 sycl_ls = FindTool("sycl-ls").resolve(llvm_config, config.llvm_tools_dir)
+print(llvm_config.__dict__)
+print(config.__dict__)
 if not sycl_ls:
     lit_config.fatal("can't find `sycl-ls`")
 

sycl/test-e2e/lit.site.cfg.py.in

@@ -6,10 +6,10 @@ import platform
 import site
 
 site.addsitedir("@CMAKE_CURRENT_SOURCE_DIR@")
-
+print(lit_config.params)
 config.dpcpp_compiler = lit_config.params.get("dpcpp_compiler", "@SYCL_CXX_COMPILER@")
-config.dpcpp_root_dir= os.path.dirname(os.path.dirname(config.dpcpp_compiler))
-
+config.dpcpp_root_dir = lit_config.params.get("dpcpp_path", os.path.dirname(os.path.dirname(config.dpcpp_compiler)))
+print(config.dpcpp_root_dir)
 config.llvm_tools_dir = os.path.join(config.dpcpp_root_dir, 'bin')
 config.lit_tools_dir = os.path.dirname("@TEST_SUITE_LIT@")
 config.dump_ir_supported = lit_config.params.get("dump_ir", ("@DUMP_IR_SUPPORTED@" if "@DUMP_IR_SUPPORTED@" else False))