================ @@ -30,6 +30,15 @@ set(LLVM_LINK_COMPONENTS TransformUtils ) +# Workaround for MSVC ARM64 performance regression: disable all optimizations (/Od) +# and then enable back all /O2 options except one. +if(NOT CMAKE_BUILD_TYPE MATCHES Debug + AND MSVC + AND MSVC_VERSION VERSION_GREATER_EQUAL 1932 + AND CMAKE_SYSTEM_PROCESSOR MATCHES "ARM64") + set_source_files_properties(CGBuiltin.cpp PROPERTIES COMPILE_FLAGS "/Od /Gw /Oi /Oy /Gy /Ob2 /Ot /GF") ---------------- tru wrote:
You are setting these settings for all configurations and erasing the other flags set for these files. I don't think that's the right solution. I would rather you grab the current compile_flags and then substitute the optimization flags only. https://github.com/llvm/llvm-project/pull/65215 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
