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[cmake] Pass -O3 when linking.

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Gold and bfd ld enable misc optimizations. lld ignores the option for now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221097 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2014-11-02 12:14:22 +00:00
parent e82f41785f
commit a0ef0e7d0c
1 changed files with 11 additions and 4 deletions
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15
cmake/modules/AddLLVM.cmake
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@ -142,7 +142,14 @@ function(add_llvm_symbol_exports target_name export_file)
set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} PARENT_SCOPE)
endfunction(add_llvm_symbol_exports)
function(add_dead_strip target_name)
function(add_link_opts target_name)
# Pass -O3 to the linker. This enabled different optimizations on different
# linkers.
if(NOT (${CMAKE_SYSTEM_NAME} MATCHES "Darwin" OR WIN32))
set_property(TARGET ${target_name} APPEND_STRING PROPERTY
LINK_FLAGS " -Wl,-O3")
endif()
if(NOT LLVM_NO_DEAD_STRIP)
if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
# ld64's implementation of -dead_strip breaks tools that use plugins.
@ -157,7 +164,7 @@ function(add_dead_strip target_name)
LINK_FLAGS " -Wl,--gc-sections")
endif()
endif()
endfunction(add_dead_strip)
endfunction(add_link_opts)
# Set each output directory according to ${CMAKE_CONFIGURATION_TYPES}.
# Note: Don't set variables CMAKE_*_OUTPUT_DIRECTORY any more,
@ -287,7 +294,7 @@ function(llvm_add_library name)
endif()
set_output_directory(${name} ${LLVM_RUNTIME_OUTPUT_INTDIR} ${LLVM_LIBRARY_OUTPUT_INTDIR})
llvm_update_compile_flags(${name})
add_dead_strip( ${name} )
add_link_opts( ${name} )
if(ARG_OUTPUT_NAME)
set_target_properties(${name}
PROPERTIES
@ -445,7 +452,7 @@ macro(add_llvm_executable name)
add_executable(${name} ${ALL_FILES})
endif()
llvm_update_compile_flags(${name})
add_dead_strip( ${name} )
add_link_opts( ${name} )
# Do not add -Dname_EXPORTS to the command-line when building files in this
# target. Doing so is actively harmful for the modules build because it