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cmake: Add Profile-Guided Optimization (PGO) support

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Adds support for Profile-Guided Optimization builds on both Windows (MSVC)
and Linux (GCC/Clang) platforms. This allows for performance optimizations
based on real usage patterns.

For MSVC:
- Adds /GL and /LTCG:PGINSTRUMENT flags for instrumentation
- Adds /GL and /LTCG:PGOPTIMIZE flags for optimization

For GCC:
- Adds -fprofile-generate flags for instrumentation
- Adds -fprofile-use flags for optimization

For Clang:
- Adds -fprofile-instr-generate flags for instrumentation
- Adds -fprofile-instr-use flags for optimization

Controlled by two new CMake options:
- CITRON_ENABLE_PGO_INSTRUMENT: Enable instrumentation build
- CITRON_ENABLE_PGO_OPTIMIZE: Enable optimization build

Updated submodules:
- Vulkan-Headers to 0f0cfd8
- Vulkan-Utility-Libraries to 50563f4
- vcpkg to cd1099f
This commit is contained in:
Zephyron 2025-03-07 20:23:23 +10:00
parent a5125d008a
commit 6a31da5905
4 changed files with 42 additions and 3 deletions
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39
CMakeLists.txt
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@ -684,3 +684,42 @@ if(ENABLE_QT AND UNIX AND NOT APPLE)
install(FILES "dist/org.citron_emu.citron.metainfo.xml"
DESTINATION "share/metainfo")
endif()
# PGO Configuration
option(CITRON_ENABLE_PGO_INSTRUMENT "Enable Profile-Guided Optimization instrumentation build" OFF)
option(CITRON_ENABLE_PGO_OPTIMIZE "Enable Profile-Guided Optimization optimization build" OFF)
if(MSVC)
if(CITRON_ENABLE_PGO_INSTRUMENT)
string(APPEND CMAKE_CXX_FLAGS_RELEASE " /GL /LTCG:PGINSTRUMENT")
string(APPEND CMAKE_EXE_LINKER_FLAGS_RELEASE " /LTCG:PGINSTRUMENT")
string(APPEND CMAKE_SHARED_LINKER_FLAGS_RELEASE " /LTCG:PGINSTRUMENT")
elseif(CITRON_ENABLE_PGO_OPTIMIZE)
string(APPEND CMAKE_CXX_FLAGS_RELEASE " /GL /LTCG:PGOPTIMIZE")
string(APPEND CMAKE_EXE_LINKER_FLAGS_RELEASE " /LTCG:PGOPTIMIZE")
string(APPEND CMAKE_SHARED_LINKER_FLAGS_RELEASE " /LTCG:PGOPTIMIZE")
endif()
else()
# GCC and Clang PGO flags
if(CITRON_ENABLE_PGO_INSTRUMENT)
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
string(APPEND CMAKE_CXX_FLAGS_RELEASE " -fprofile-instr-generate")
string(APPEND CMAKE_EXE_LINKER_FLAGS_RELEASE " -fprofile-instr-generate")
string(APPEND CMAKE_SHARED_LINKER_FLAGS_RELEASE " -fprofile-instr-generate")
else() # GCC
string(APPEND CMAKE_CXX_FLAGS_RELEASE " -fprofile-generate")
string(APPEND CMAKE_EXE_LINKER_FLAGS_RELEASE " -fprofile-generate")
string(APPEND CMAKE_SHARED_LINKER_FLAGS_RELEASE " -fprofile-generate")
endif()
elseif(CITRON_ENABLE_PGO_OPTIMIZE)
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
string(APPEND CMAKE_CXX_FLAGS_RELEASE " -fprofile-instr-use=default.profdata")
string(APPEND CMAKE_EXE_LINKER_FLAGS_RELEASE " -fprofile-instr-use=default.profdata")
string(APPEND CMAKE_SHARED_LINKER_FLAGS_RELEASE " -fprofile-instr-use=default.profdata")
else() # GCC
string(APPEND CMAKE_CXX_FLAGS_RELEASE " -fprofile-use")
string(APPEND CMAKE_EXE_LINKER_FLAGS_RELEASE " -fprofile-use")
string(APPEND CMAKE_SHARED_LINKER_FLAGS_RELEASE " -fprofile-use")
endif()
endif()
endif()