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function(clr_pgo_unknown_arch)
if (WIN32)
message(FATAL_ERROR "Only AMD64, ARM and I386 are supported for PGO")
else()
message(FATAL_ERROR "PGO not currently supported on the current platform")
endif()
endfunction(clr_pgo_unknown_arch)
# Adds Profile Guided Optimization (PGO) flags to the current target
function(add_pgo TargetName)
if(WIN32)
set(ProfileFileName "${TargetName}.pgd")
else(WIN32)
# Clang/LLVM uses one profdata file for the entire repo
set(ProfileFileName "coreclr.profdata")
endif(WIN32)
set(CLR_CMAKE_OPTDATA_PACKAGEWITHRID "optimization.${CLR_CMAKE_TARGET_OS}-${CLR_CMAKE_TARGET_ARCH}.PGO.CoreCLR")
file(TO_NATIVE_PATH
"${CLR_CMAKE_PACKAGES_DIR}/${CLR_CMAKE_OPTDATA_PACKAGEWITHRID}/${CLR_CMAKE_OPTDATA_VERSION}/data/${ProfileFileName}"
ProfilePath
)
if(CLR_CMAKE_PGO_INSTRUMENT)
if(WIN32)
set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS_RELEASE " /LTCG /GENPROFILE")
set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS_RELWITHDEBINFO " /LTCG /GENPROFILE")
else(WIN32)
if(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
target_compile_options(${TargetName} PRIVATE -flto -fprofile-instr-generate)
set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -flto -fuse-ld=gold -fprofile-instr-generate")
endif(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
endif(WIN32)
else(CLR_CMAKE_PGO_INSTRUMENT)
# If we don't have profile data availble, gracefully fall back to a non-PGO opt build
if(EXISTS ${ProfilePath})
if(WIN32)
set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS_RELEASE " /LTCG /USEPROFILE:PGD=${ProfilePath}")
set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS_RELWITHDEBINFO " /LTCG /USEPROFILE:PGD=${ProfilePath}")
else(WIN32)
if(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
if(HAVE_LTO)
target_compile_options(${TargetName} PRIVATE -flto -fprofile-instr-use=${ProfilePath})
set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -flto -fuse-ld=gold -fprofile-instr-use=${ProfilePath}")
endif(HAVE_LTO)
endif(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
endif(WIN32)
endif(EXISTS ${ProfilePath})
endif(CLR_CMAKE_PGO_INSTRUMENT)
endfunction(add_pgo)
if(WIN32)
if(CLR_CMAKE_PGO_INSTRUMENT)
# Instrumented PGO binaries on Windows introduce an additional runtime dependency, pgort<ver>.dll.
# Make sure we copy it next to the installed product to make it easier to redistribute the package.
string(SUBSTRING ${CMAKE_VS_PLATFORM_TOOLSET} 1 -1 VS_PLATFORM_VERSION_NUMBER)
set(PGORT_FILENAME "pgort${VS_PLATFORM_VERSION_NUMBER}.dll")
get_filename_component(PATH_CXX_ROOTDIR ${CMAKE_CXX_COMPILER} DIRECTORY)
if(CLR_CMAKE_PLATFORM_ARCH_I386)
set(PATH_VS_PGORT_DLL "${PATH_CXX_ROOTDIR}/${PGORT_FILENAME}")
elseif(CLR_CMAKE_PLATFORM_ARCH_AMD64)
set(PATH_VS_PGORT_DLL "${PATH_CXX_ROOTDIR}/../amd64/${PGORT_FILENAME}")
elseif(CLR_CMAKE_PLATFORM_ARCH_ARM)
set(PATH_VS_PGORT_DLL "${PATH_CXX_ROOTDIR}/../arm/${PGORT_FILENAME}")
else()
clr_pgo_unknown_arch()
endif()
if (EXISTS ${PATH_VS_PGORT_DLL})
message(STATUS "Found PGO runtime: ${PATH_VS_PGORT_DLL}")
install(PROGRAMS ${PATH_VS_PGORT_DLL} DESTINATION .)
else()
message(FATAL_ERROR "file not found: ${PATH_VS_PGORT_DLL}")
endif()
endif(CLR_CMAKE_PGO_INSTRUMENT)
endif(WIN32)
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