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Add experimental pass manager by default in clang

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Danila Kutenin 2020-10-05 09:01:51 +03:00
parent bbedd9b08f
commit a3d27962a7
1 changed files with 5 additions and 0 deletions
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5
CMakeLists.txt
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@ -300,6 +300,11 @@ if (COMPILER_CLANG)
option(ENABLE_THINLTO "Clang-specific link time optimization" ON)
endif()
# Set new experimental pass manager, it's a performance, build time and binary size win.
# Can be removed after https://reviews.llvm.org/D66490 merged and released to at least two versions of clang.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexperimental-new-pass-manager")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fexperimental-new-pass-manager")
# We cannot afford to use LTO when compiling unit tests, and it's not enough
# to only supply -fno-lto at the final linking stage. So we disable it
# completely.