================
@@ -928,6 +928,186 @@ if (CLANG_BOLT AND NOT LLVM_BUILD_INSTRUMENTED)
)
endif()
+if (CLANG_PROPELLER_INSTRUMENT AND NOT LLVM_BUILD_INSTRUMENTED)
+ set(CLANG_PATH ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang)
+ set(CLANGXX_PATH ${CLANG_PATH}++)
+ set(PROPELLER_ARTIFACTS_DIR ${CMAKE_CURRENT_BINARY_DIR}/propeller-artifacts)
+ set(PROPELLER_INSTRUMENTED_BINARY_DIR
${PROPELLER_ARTIFACTS_DIR}/propeller-instrumented-clang/)
+ set(PROPELLER_PROFILING_BINARY_DIR
${PROPELLER_ARTIFACTS_DIR}/propeller-profile-collection-run/)
+ set(PROPELLER_OPTIMIZED_BINARY_DIR
${PROPELLER_ARTIFACTS_DIR}/propeller-optimized-clang/)
+ set(CLANG_PROPELLER_LABELS ${PROPELLER_INSTRUMENTED_BINARY_DIR}/bin/clang)
+ set(CLANG_PROPELLER_LABELS_BINARY
${CLANG_PROPELLER_LABELS}-${CLANG_VERSION_MAJOR})
+ set(CLANGXX_PROPELLER_LABELS ${CLANG_PROPELLER_LABELS}++)
+ set(PROPELLER_PERF_DATA
${PROPELLER_ARTIFACTS_DIR}/profiles/propeller_perf.data)
+ set(PROPELLER_CLUSTER_FILE ${PROPELLER_ARTIFACTS_DIR}/profiles/cluster.txt)
+ set(PROPELLER_SYMORDER_FILE ${PROPELLER_ARTIFACTS_DIR}/profiles/symorder.txt)
+
+ # Check if perf is available on the system and supports LBR, otherwise
+ # abort as Propeller cannot be applied here.
+ set(perf_args "${PROPELLER_PERF_PROFILE_COLLECTION_PREFIX}")
+ separate_arguments(perf_args UNIX_COMMAND "${perf_args}")
+ execute_process(
+ COMMAND perf ${perf_args} -- ls
+ RESULT_VARIABLE perf_status
+ OUTPUT_VARIABLE perf_stats
+ ERROR_QUIET
+ )
+ if (perf_status)
+ message(FATAL_ERROR "perf with LBR is not available on this system")
+ else()
+ message(STATUS "perf is available and supports LBR")
+ endif()
+
+ # Check if create_llvm_prof is available, otherwise abort as Propeller
+ # cannot be applied here.
+ execute_process(
+ COMMAND sh -c "${PATH_TO_CREATE_LLVM_PROF} --version"
+ RESULT_VARIABLE create_llvm_prof_status
+ OUTPUT_VARIABLE create_llvm_prof_out
+ ERROR_QUIET
+ )
+ if (create_llvm_prof_status)
+ message(FATAL_ERROR "create_llvm_prof is not installed/available at:
${PATH_TO_CREATE_LLVM_PROF}. "
+ "Use -DPATH_TO_CREATE_LLVM_PROF= during cmake to
specify its location.")
+ else()
+ message(STATUS "create_llvm_prof is available")
+ endif()
+
+ # Build an "instrumented" Propeller binary with Propeller labels. This adds
+ # a metadata section to the clang binary.
+ add_custom_target(propeller-labels
+ COMMENT "Creating Propeller Labels Binary"
+ DEPENDS clang clang-propeller-labels-build
+ )
+
+ # This command converts hardware profiles to the propeller format.
+ add_custom_command(OUTPUT ${PROPELLER_CLUSTER_FILE}
+ DEPENDS ${PROPELLER_PERF_DATA}
+ COMMAND ${PATH_TO_CREATE_LLVM_PROF} --format=propeller
+ --binary=${CLANG_PROPELLER_LABELS_BINARY}
+ --profile=${PROPELLER_PERF_DATA}
+ --out=${PROPELLER_CLUSTER_FILE}
+ --propeller_symorder=${PROPELLER_SYMORDER_FILE}
+ --propeller_call_chain_clustering
+ --propeller_chain_split
+ VERBATIM
+ )
+
+ # Generate Propeller profiles by first hardware sampling a build of clang and
+ # then converting it using create_llvm_prof.
+ add_custom_target(propeller-gen-profiles
+ COMMENT "Generating Propeller Profiles"
+ DEPENDS ${PROPELLER_CLUSTER_FILE}
+ )
+
+ # This uses the generated Propeller layout files to build the final
optimized
+ # clang binary.
+ add_custom_target(propeller-opt-binary
+ COMMENT "Generating Propeller Optimized Clang"
+ DEPENDS clang-propeller-optimized-build
+ )
+
+ # This project is setup to build a propeller "instrumented" labels binary.
+ set(STAMP_DIR
${PROPELLER_ARTIFACTS_DIR}/stamps/propeller-instrumented-clang-stamps/)
+ set(build_configuration "$<CONFIG>")
+ include(ExternalProject)
+ set(CLANG_PROPELLER_INSTRUMENT_CMAKE_CC_FLAGS "-fbasic-block-sections=labels
${CLANG_PROPELLER_EXTRA_CMAKE_CC_FLAGS}")
----------------
tmsri wrote:
Updated.
https://github.com/llvm/llvm-project/pull/91002
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