Don't use -O3 on Mingw, as people report it as unreliable. Use -O2
instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123028 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/modules/LLVMProcessSources.cmake b/cmake/modules/LLVMProcessSources.cmake
index 5f59eac..98b6129 100644
--- a/cmake/modules/LLVMProcessSources.cmake
+++ b/cmake/modules/LLVMProcessSources.cmake
@@ -1,5 +1,15 @@
include(AddFileDependencies)
+macro(llvm_replace_compiler_option var old new)
+ # Replaces a compiler option or switch `old' in `var' by `new'.
+ # If `old' is not in `var', appends `new' to `var'.
+ # Example: llvm_replace_compiler_option(CMAKE_CXX_FLAGS_RELEASE "-O3" "-O2")
+ if( "${${var}}" MATCHES "(^| )${old}($| )" )
+ string( REGEX REPLACE "(^| )${old}($| )" " ${new} " ${var} "${${var}}" )
+ else()
+ set( ${var} "${${var}} ${new}" )
+ endif()
+endmacro(llvm_replace_compiler_option)
macro(add_td_sources srcs)
file(GLOB tds *.td)