Reduce Execution Context Save+Restore (#15629)

[platform/upstream/coreclr.git] / pgosupport.cmake

diff --git a/pgosupport.cmake b/pgosupport.cmake
index e4e6bd5..96ff80a 100644 (file)
--- a/pgosupport.cmake
+++ b/pgosupport.cmake
@@ -1,69 +1,51 @@
-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 "${TargetName}.pgd")
+    else(WIN32)
+        set(ProfileFileName "${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
-        "${CLR_CMAKE_PACKAGES_DIR}/${CLR_CMAKE_OPTDATA_PACKAGEWITHRID}/${CLR_CMAKE_OPTDATA_VERSION}/data/${ProfileFileName}"
+        "${CLR_CMAKE_PACKAGES_DIR}/${OptDataVersionedSubPath}/data/${ProfileFileName}"
         ProfilePath
     )
 
-    # Enable PGO only for optimized configs
-    set(ConfigTypeList RELEASE RELWITHDEBINFO)
-
-    foreach(ConfigType IN LISTS ConfigTypeList)
-        set(LinkFlagsProperty "LINK_FLAGS_${ConfigType}")
-        if(CLR_CMAKE_PGO_INSTRUMENT)
+    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)
+    elseif(CLR_CMAKE_PGO_OPTIMIZE)
+        # 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 ${LinkFlagsProperty} "/LTCG /GENPROFILE")
+                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)
+                            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)
-        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 ${LinkFlagsProperty} "/LTCG /USEPROFILE:PGD=${ProfilePath}")
-                endif(WIN32)
-            endif(EXISTS ${ProfilePath})
-        endif(CLR_CMAKE_PGO_INSTRUMENT)
-    endforeach(ConfigType)
+        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)