1 function(clr_pgo_unknown_arch)
3 message(FATAL_ERROR "Only AMD64, ARM and I386 are supported for PGO")
5 message(FATAL_ERROR "PGO not currently supported on the current platform")
7 endfunction(clr_pgo_unknown_arch)
9 # Adds Profile Guided Optimization (PGO) flags to the current target
10 function(add_pgo TargetName)
12 set(ProfileFileName "${TargetName}.pgd")
14 # Clang/LLVM uses one profdata file for the entire repo
15 set(ProfileFileName "coreclr.profdata")
18 set(CLR_CMAKE_OPTDATA_PACKAGEWITHRID "optimization.${CLR_CMAKE_TARGET_OS}-${CLR_CMAKE_TARGET_ARCH}.PGO.CoreCLR")
20 "${CLR_CMAKE_PACKAGES_DIR}/${CLR_CMAKE_OPTDATA_PACKAGEWITHRID}/${CLR_CMAKE_OPTDATA_VERSION}/data/${ProfileFileName}"
23 # NuGet packages are restored to lowercase paths
24 string(TOLOWER "${ProfilePath}" ProfilePath)
26 if(CLR_CMAKE_PGO_INSTRUMENT)
28 set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS_RELEASE " /LTCG /GENPROFILE")
29 set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS_RELWITHDEBINFO " /LTCG /GENPROFILE")
31 if(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
32 target_compile_options(${TargetName} PRIVATE -flto -fprofile-instr-generate)
33 set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -flto -fuse-ld=gold -fprofile-instr-generate")
34 endif(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
36 else(CLR_CMAKE_PGO_INSTRUMENT)
37 # If we don't have profile data availble, gracefully fall back to a non-PGO opt build
38 if(EXISTS ${ProfilePath})
40 set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS_RELEASE " /LTCG /USEPROFILE:PGD=${ProfilePath}")
41 set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS_RELWITHDEBINFO " /LTCG /USEPROFILE:PGD=${ProfilePath}")
43 if(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
45 target_compile_options(${TargetName} PRIVATE -flto -fprofile-instr-use=${ProfilePath} -Wno-profile-instr-out-of-date)
46 set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -flto -fuse-ld=gold -fprofile-instr-use=${ProfilePath}")
48 endif(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
50 endif(EXISTS ${ProfilePath})
51 endif(CLR_CMAKE_PGO_INSTRUMENT)
55 if(CLR_CMAKE_PGO_INSTRUMENT)
56 # Instrumented PGO binaries on Windows introduce an additional runtime dependency, pgort<ver>.dll.
57 # Make sure we copy it next to the installed product to make it easier to redistribute the package.
59 string(SUBSTRING ${CMAKE_VS_PLATFORM_TOOLSET} 1 -1 VS_PLATFORM_VERSION_NUMBER)
60 set(PGORT_FILENAME "pgort${VS_PLATFORM_VERSION_NUMBER}.dll")
62 get_filename_component(PATH_CXX_ROOTDIR ${CMAKE_CXX_COMPILER} DIRECTORY)
64 if(CLR_CMAKE_PLATFORM_ARCH_I386)
65 set(PATH_VS_PGORT_DLL "${PATH_CXX_ROOTDIR}/${PGORT_FILENAME}")
66 elseif(CLR_CMAKE_PLATFORM_ARCH_AMD64)
67 set(PATH_VS_PGORT_DLL "${PATH_CXX_ROOTDIR}/../amd64/${PGORT_FILENAME}")
68 elseif(CLR_CMAKE_PLATFORM_ARCH_ARM)
69 set(PATH_VS_PGORT_DLL "${PATH_CXX_ROOTDIR}/../arm/${PGORT_FILENAME}")
71 clr_pgo_unknown_arch()
74 if (EXISTS ${PATH_VS_PGORT_DLL})
75 message(STATUS "Found PGO runtime: ${PATH_VS_PGORT_DLL}")
76 install(PROGRAMS ${PATH_VS_PGORT_DLL} DESTINATION .)
78 message(FATAL_ERROR "file not found: ${PATH_VS_PGORT_DLL}")
81 endif(CLR_CMAKE_PGO_INSTRUMENT)