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Enable LTO #1627

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57813d8
Enable LTO for compiling Spicy/HILTI sources.
bbannier Dec 22, 2023
2341f0b
Enable LTO for runtime libraries.
bbannier Dec 22, 2023
30c5531
fixup! Enable LTO for runtime libraries.
bbannier Dec 22, 2023
b41a9b9
fixup! fixup! Enable LTO for runtime libraries.
bbannier Dec 22, 2023
d4344c9
fixup! Enable LTO for compiling Spicy/HILTI sources.
bbannier Dec 22, 2023
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11 changes: 11 additions & 0 deletions hilti/runtime/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -50,9 +50,17 @@ set(SOURCES
src/version.cc
${PROJECT_SOURCE_DIR}/3rdparty/utf8proc/utf8proc.c)

include(CheckIPOSupported)
check_ipo_supported(RESULT ipo_supported)

foreach (lib hilti-rt hilti-rt-debug)
add_library(${lib}-objects OBJECT ${SOURCES})
target_compile_options(${lib}-objects PRIVATE "-fPIC")

if (ipo_supported)
set_property(TARGET ${lib}-objects PROPERTY INTERPROCEDURAL_OPTIMIZATION ON)
endif ()

target_link_libraries(${lib}-objects PRIVATE ${CMAKE_THREAD_LIBS_INIT} ${CMAKE_DL_LIBS})
target_include_directories(${lib}-objects BEFORE
PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>)
Expand All @@ -74,6 +82,9 @@ foreach (lib hilti-rt hilti-rt-debug)
target_link_libraries(${lib} ${lib}-objects)
target_link_libraries(${lib} jrx-objects)
target_link_libraries(${lib} fiber)
if (ipo_supported)
set_property(TARGET ${lib} PROPERTY INTERPROCEDURAL_OPTIMIZATION ON)
endif ()
endforeach ()

# Build hilti-rt with release flags.
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6 changes: 6 additions & 0 deletions hilti/toolchain/CMakeLists.txt
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Expand Up @@ -122,6 +122,12 @@ add_dependencies(hilti-objects reproc++)
target_include_directories(hilti-objects BEFORE
PRIVATE ${PROJECT_SOURCE_DIR}/3rdparty/reproc/reproc++/include)

include(CheckIPOSupported)
check_ipo_supported(RESULT IPO_SUPPORTED)
if (IPO_SUPPORTED)
set_property(TARGET hilti-objects PROPERTY INTERPROCEDURAL_OPTIMIZATION ON)
endif ()

add_library(hilti)
hilti_link_object_libraries_in_tree(hilti PUBLIC)

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14 changes: 8 additions & 6 deletions hilti/toolchain/src/config.cc.in
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Expand Up @@ -145,6 +145,7 @@ void Configuration::init(bool use_build_directory) {
prefix("${HILTI_CONFIG_RUNTIME_CXX_FLAGS_DEBUG}", "", installation_tag)});

runtime_cxx_flags_release = flatten({"-fPIC", "-std=c++17", "-g", "-O3", "-DNDEBUG", "-fvisibility=hidden",
"-flto", // FIXME(bbannier): enable if detected in CMake.
prefix("${HILTI_CONFIG_RUNTIME_CXX_INCLUDE_DIRS}", "-I", installation_tag),
prefix("${HILTI_CONFIG_RUNTIME_CXX_FLAGS_RELEASE}", "", installation_tag)});

Expand All @@ -162,12 +163,13 @@ void Configuration::init(bool use_build_directory) {
prefix("${HILTI_CONFIG_RUNTIME_LD_FLAGS_DEBUG}", "", installation_tag),
prefix(CMAKE_THREAD_LIBS_INIT, "-l", installation_tag), prefix(CMAKE_DL_LIBS, "-l", installation_tag)});

runtime_ld_flags_release = flatten(
{prefix("${HILTI_CONFIG_RUNTIME_CXX_LIBRARY_DIRS}", "-L", installation_tag),
prefix("${HILTI_CONFIG_RUNTIME_CXX_LIBRARY_DIRS}", "-Wl,-rpath,", installation_tag),
prefix("${HILTI_CONFIG_RUNTIME_LIBRARIES_RELEASE}", "-l", installation_tag),
prefix("${HILTI_CONFIG_RUNTIME_LD_FLAGS_RELEASE}", "", installation_tag),
prefix(CMAKE_THREAD_LIBS_INIT, "-l", installation_tag), prefix(CMAKE_DL_LIBS, "-l", installation_tag)});
runtime_ld_flags_release =
flatten({prefix("${HILTI_CONFIG_RUNTIME_CXX_LIBRARY_DIRS}", "-L", installation_tag),
prefix("${HILTI_CONFIG_RUNTIME_CXX_LIBRARY_DIRS}", "-Wl,-rpath,", installation_tag),
prefix("${HILTI_CONFIG_RUNTIME_LIBRARIES_RELEASE}", "-l", installation_tag),
prefix("${HILTI_CONFIG_RUNTIME_LD_FLAGS_RELEASE}", "", installation_tag),
prefix(CMAKE_THREAD_LIBS_INIT, "-l", installation_tag), prefix(CMAKE_DL_LIBS, "-l", installation_tag),
"-flto"}); // FIXME(bbannier): enable if detected in CMake.

hlto_cxx_flags_debug = runtime_cxx_flags_debug;
hlto_cxx_flags_release = runtime_cxx_flags_release;
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5 changes: 2 additions & 3 deletions scripts/precompile-headers.sh
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Expand Up @@ -64,11 +64,10 @@ cp "${LIBHILTI}" "${CACHE}/precompiled_libhilti_debug.h"
$("${HILTI_CONFIG}" --cxx --cxxflags --debug) -x c++-header "${LIBHILTI}" -o "${CACHE}/precompiled_libhilti_debug.h.gch"

cp "${LIBHILTI}" "${CACHE}/precompiled_libhilti.h"

$("${HILTI_CONFIG}" --cxx --cxxflags) -x c++-header "${LIBHILTI}" -o "${CACHE}/precompiled_libhilti.h.gch"
$("${HILTI_CONFIG}" --cxx --cxxflags | sed 's/-flto//g') -x c++-header "${LIBHILTI}" -o "${CACHE}/precompiled_libhilti.h.gch"

cp "${LIBSPICY}" "${CACHE}/precompiled_libspicy_debug.h"
$("${SPICY_CONFIG}" --cxx --cxxflags --debug) -x c++-header "${LIBSPICY}" -o "${CACHE}/precompiled_libspicy_debug.h.gch"

cp "${LIBSPICY}" "${CACHE}/precompiled_libspicy.h"
$("${SPICY_CONFIG}" --cxx --cxxflags) -x c++-header "${LIBSPICY}" -o "${CACHE}/precompiled_libspicy.h.gch"
$("${SPICY_CONFIG}" --cxx --cxxflags | sed 's/-flto//g') -x c++-header "${LIBSPICY}" -o "${CACHE}/precompiled_libspicy.h.gch"
6 changes: 6 additions & 0 deletions spicy/toolchain/CMakeLists.txt
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Expand Up @@ -92,6 +92,12 @@ target_link_libraries(spicy-objects
target_link_libraries(spicy-objects PUBLIC ${CMAKE_THREAD_LIBS_INIT} ${CMAKE_DL_LIBS})
target_link_libraries(spicy-objects PRIVATE hilti)

include(CheckIPOSupported)
check_ipo_supported(RESULT IPO_SUPPORTED)
if (IPO_SUPPORTED)
set_property(TARGET spicy-objects PROPERTY INTERPROCEDURAL_OPTIMIZATION ON)
endif ()

add_library(spicy)
hilti_link_libraries_in_tree(spicy PUBLIC)
spicy_link_object_libraries_in_tree(spicy PUBLIC)
Expand Down