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Merge pull request #15608 from danlark1/clang-pass-manager

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Use experimental pass manager by default in clang
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alexey-milovidov 2020-10-05 18:05:57 +03:00 committed by GitHub
commit 1eb8bb19f0
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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.