include(LLVMExternalProjectUtils)
set(CLANG_PGO_TRAINING_DATA "${CMAKE_CURRENT_SOURCE_DIR}" CACHE PATH
"The path to a lit testsuite containing samples for PGO and order file generation"
)
set(CLANG_PGO_TRAINING_DATA_SOURCE_DIR OFF CACHE STRING "Path to source directory containing cmake project with source files to use for generating pgo data")
set(CLANG_PGO_TRAINING_DEPS "" CACHE STRING "Extra dependencies needed to build the PGO training data.")
if(LLVM_BUILD_INSTRUMENTED)
configure_lit_site_cfg(
${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in
${CMAKE_CURRENT_BINARY_DIR}/pgo-data/lit.site.cfg
)
add_lit_testsuite(generate-profraw "Generating clang PGO data"
${CMAKE_CURRENT_BINARY_DIR}/pgo-data/
EXCLUDE_FROM_CHECK_ALL
DEPENDS clear-profraw
)
add_custom_target(clear-profraw
COMMAND "${Python3_EXECUTABLE}" ${CMAKE_CURRENT_SOURCE_DIR}/perf-helper.py clean ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_BINARY_DIR}/profiles/ profraw
COMMENT "Clearing old profraw data")
if(NOT LLVM_PROFDATA)
find_program(LLVM_PROFDATA llvm-profdata)
endif()
if(NOT LLVM_PROFDATA)
message(STATUS "To enable merging PGO data LLVM_PROFDATA has to point to llvm-profdata")
else()
add_custom_command(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/clang.profdata
# generate-profraw is a custom_target which are always considered stale.
# If we add it here to 'DEPENDS', then it will always execute and running
# ninja install && ninja check-all will result in the profile data being
# generated twice, and cause the ninja check-all build to fail with errors like:
# `ld.lld: error: Function Import: link error: linking module flags 'ProfileSummary': IDs have conflicting values in`
# Therefor we call the generate-profraw target manually as part of this custom
# command, which will only run if clang or ${CLANG_PGO_TRAINING_DEPS} are updated.
COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target generate-profraw
COMMAND "${Python3_EXECUTABLE}" ${CMAKE_CURRENT_SOURCE_DIR}/perf-helper.py merge ${LLVM_PROFDATA} ${CMAKE_CURRENT_BINARY_DIR}/clang.profdata ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_BINARY_DIR}/profiles/
COMMENT "Merging profdata"
DEPENDS clang ${CLANG_PGO_TRAINING_DEPS}
)
add_custom_target(generate-profdata DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/clang.profdata)
if (CLANG_PGO_TRAINING_DATA_SOURCE_DIR)
llvm_ExternalProject_Add(generate-profraw-external ${CLANG_PGO_TRAINING_DATA_SOURCE_DIR}
USE_TOOLCHAIN EXLUDE_FROM_ALL NO_INSTALL DEPENDS generate-profraw)
add_dependencies(generate-profdata generate-profraw-external)
endif()
endif()
endif()
find_program(DTRACE dtrace)
# TODO: Look into supporting this for the driver build. It will require changing
# the perf-helper.py file to understand to call `llvm` as `llvm clang`.
if(APPLE AND DTRACE AND NOT LLVM_TOOL_LLVM_DRIVER_BUILD)
configure_lit_site_cfg(
${CMAKE_CURRENT_SOURCE_DIR}/order-files.lit.site.cfg.in
${CMAKE_CURRENT_BINARY_DIR}/order-files/lit.site.cfg
)
add_lit_testsuite(generate-dtrace-logs "Generating clang dtrace data"
${CMAKE_CURRENT_BINARY_DIR}/order-files/
EXCLUDE_FROM_CHECK_ALL
ARGS -j 1
DEPENDS clang clear-dtrace-logs
)
add_custom_target(clear-dtrace-logs
COMMAND "${Python3_EXECUTABLE}" ${CMAKE_CURRENT_SOURCE_DIR}/perf-helper.py clean ${CMAKE_CURRENT_BINARY_DIR} dtrace
COMMENT "Clearing old dtrace data")
if(NOT CLANG_ORDER_FILE)
message(FATAL_ERROR "Output clang order file is not set")
endif()
add_custom_target(generate-order-file
COMMAND "${Python3_EXECUTABLE}" ${CMAKE_CURRENT_SOURCE_DIR}/perf-helper.py gen-order-file --binary $<TARGET_FILE:clang> --output ${CLANG_ORDER_FILE} ${CMAKE_CURRENT_BINARY_DIR}
COMMENT "Generating order file"
DEPENDS generate-dtrace-logs)
endif()
if(CLANG_BOLT AND NOT LLVM_BUILD_INSTRUMENTED)
set(CLANG_BOLT_INSTRUMENTED "clang-bolt.inst" CACHE STRING
"Name of BOLT-instrumented Clang binary")
configure_lit_site_cfg(
${CMAKE_CURRENT_SOURCE_DIR}/bolt.lit.site.cfg.in
${CMAKE_CURRENT_BINARY_DIR}/bolt-fdata/lit.site.cfg
)
add_lit_testsuite(generate-bolt-fdata "Generating BOLT profile for Clang"
${CMAKE_CURRENT_BINARY_DIR}/bolt-fdata/
EXCLUDE_FROM_CHECK_ALL
DEPENDS clang-bolt-training-deps clear-bolt-fdata clear-perf-data
)
add_custom_target(clear-bolt-fdata
COMMAND "${Python3_EXECUTABLE}" ${CMAKE_CURRENT_SOURCE_DIR}/perf-helper.py clean ${CMAKE_CURRENT_BINARY_DIR} fdata
COMMENT "Clearing old BOLT fdata")
add_custom_target(clear-perf-data
COMMAND "${Python3_EXECUTABLE}" ${CMAKE_CURRENT_SOURCE_DIR}/perf-helper.py clean ${CMAKE_CURRENT_BINARY_DIR} perf.data
COMMENT "Clearing old perf data")
string(TOUPPER "${CLANG_BOLT}" CLANG_BOLT)
if (CLANG_BOLT STREQUAL "LBR")
set(BOLT_LBR "--lbr")
endif()
add_custom_target(merge-fdata-deps)
if (CLANG_BOLT STREQUAL "INSTRUMENT")
add_dependencies(merge-fdata-deps generate-bolt-fdata)
else()
# Convert perf profiles into fdata
add_custom_target(convert-perf-fdata
COMMAND "${Python3_EXECUTABLE}" ${CMAKE_CURRENT_SOURCE_DIR}/perf-helper.py perf2bolt $<TARGET_FILE:llvm-bolt> ${CMAKE_CURRENT_BINARY_DIR} $<TARGET_FILE:clang> ${BOLT_LBR}
COMMENT "Converting perf files to BOLT fdata"
DEPENDS llvm-bolt generate-bolt-fdata)
add_dependencies(merge-fdata-deps convert-perf-fdata)
endif()
# Merge profiles into one using merge-fdata
add_custom_target(clang-bolt-profile
COMMAND "${Python3_EXECUTABLE}" ${CMAKE_CURRENT_SOURCE_DIR}/perf-helper.py merge-fdata $<TARGET_FILE:merge-fdata> ${CMAKE_CURRENT_BINARY_DIR}/prof.fdata ${CMAKE_CURRENT_BINARY_DIR}
COMMENT "Merging BOLT fdata"
DEPENDS merge-fdata merge-fdata-deps)
endif()
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