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| author | Guillaume Chatelet <gchatelet@google.com> | 2022-05-18 18:09:09 +0300 |
|---|---|---|
| committer | Guillaume Chatelet <gchatelet@google.com> | 2022-05-19 12:08:42 +0300 |
| commit | 94d6dd90576637fa0eb2c40ca92320ad4c1a6942 (patch) | |
| tree | 487caad7be6218d4ce9a459e2c797c3a3a3685d6 /libc/cmake/modules/LLVMLibCObjectRules.cmake | |
| parent | 4e8b2ac7c01982f05d10e100299dadb5d4c79c5e (diff) | |
[libc] Apply no-builtin everywhere, remove unnecessary flags
Some functions like `stpncpy` are implemented in terms of `memset` but are not
currently using `-fno-builtin-memset`. This is somewhat hidden by the fact that
we use `-ffreestanding` globally and that `-ffreestanding` implies
`-fno-builtin` for Clang.
This patch also removes `-mllvm -combiner-global-alias-analysis` that is Clang
specific and that does not bring substantial gains on modern processors.
Also we keep `-mllvm --tail-merge-threshold=0` for aarch64 in CMakeLists.txt
but we omit it in the Bazel config. This is because Bazel consumes the source
files directly and so it can use PGO to take optimal decisions locally.
Differential Revision: https://reviews.llvm.org/D125894
Diffstat (limited to 'libc/cmake/modules/LLVMLibCObjectRules.cmake')
| -rw-r--r-- | libc/cmake/modules/LLVMLibCObjectRules.cmake | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libc/cmake/modules/LLVMLibCObjectRules.cmake b/libc/cmake/modules/LLVMLibCObjectRules.cmake index 8e2f489752a6..2544a648c8a5 100644 --- a/libc/cmake/modules/LLVMLibCObjectRules.cmake +++ b/libc/cmake/modules/LLVMLibCObjectRules.cmake @@ -3,7 +3,7 @@ set(OBJECT_LIBRARY_TARGET_TYPE "OBJECT_LIBRARY") function(_get_common_compile_options output_var) set(compile_options ${LLVM_CXX_STD_default} ${LIBC_COMPILE_OPTIONS_DEFAULT} ${ARGN}) if(NOT ${LIBC_TARGET_OS} STREQUAL "windows") - set(compile_options ${compile_options} -fpie -ffreestanding) + set(compile_options ${compile_options} -fpie -ffreestanding -fno-builtin) endif() if(LLVM_COMPILER_IS_GCC_COMPATIBLE) list(APPEND compile_options "-fno-exceptions") |