summaryrefslogtreecommitdiff
path: root/pgosupport.cmake
blob: 514c725f438757b5317871af99d23cf4ce40f3aa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
# Adds Profile Guided Optimization (PGO) flags to the current target
function(add_pgo TargetName)
    if(WIN32)
        set(ProfileFileName "${TargetName}.pgd")
    else(WIN32)
        set(ProfileFileName "${TargetName}.profdata")
    endif(WIN32)

    set(CLR_CMAKE_OPTDATA_PACKAGEWITHRID "optimization.${CLR_CMAKE_TARGET_OS}-${CLR_CMAKE_TARGET_ARCH}.PGO.CoreCLR")

    # On case-sensitive file systems, NuGet packages are restored to lowercase paths
    string(TOLOWER "${CLR_CMAKE_OPTDATA_PACKAGEWITHRID}/${CLR_CMAKE_OPTDATA_VERSION}" OptDataVersionedSubPath)

    file(TO_NATIVE_PATH
        "${CLR_CMAKE_PACKAGES_DIR}/${OptDataVersionedSubPath}/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=/tmp/${TargetName}-%p.profdata)
                set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -flto -fuse-ld=gold -fprofile-instr-generate=/tmp/${TargetName}-%p.profdata")
            endif(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
        endif(WIN32)
    elseif(CLR_CMAKE_PGO_OPTIMIZE)
        # If we don't have profile data availble, gracefully fall back to a non-PGO opt build
        if(NOT EXISTS ${ProfilePath})
            message("PGO data file NOT found: ${ProfilePath}")
        else(NOT 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(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.6)
                        if(HAVE_LTO)
                            target_compile_options(${TargetName} PRIVATE -flto -fprofile-instr-use=${ProfilePath} -Wno-profile-instr-out-of-date -Wno-profile-instr-unprofiled)
                            set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -flto -fuse-ld=gold -fprofile-instr-use=${ProfilePath}")
                        else(HAVE_LTO)
                            message(WARNING "LTO is not supported, skipping profile guided optimizations")
                        endif(HAVE_LTO)
                    else(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.6)
                        message(WARNING "PGO is not supported; Clang 3.6 or later is required for profile guided optimizations")
                    endif(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.6)
                endif(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
            endif(WIN32)
        endif(NOT EXISTS ${ProfilePath})
    endif(CLR_CMAKE_PGO_INSTRUMENT)
endfunction(add_pgo)