diff --git a/cmake/modules/LLVMProcessSources.cmake b/cmake/modules/LLVMProcessSources.cmake
index ccc22a80274..296ce925b0c 100644
--- a/cmake/modules/LLVMProcessSources.cmake
+++ b/cmake/modules/LLVMProcessSources.cmake
@@ -58,24 +58,6 @@ function(llvm_process_sources OUT_VAR)
     list(APPEND sources ${ARG_ADDITIONAL_HEADERS})
   endif()
 
-  # Set common compiler options:
-  if( NOT LLVM_REQUIRES_EH )
-    if( LLVM_COMPILER_IS_GCC_COMPATIBLE )
-      add_definitions( -fno-exceptions )
-    elseif( MSVC )
-      llvm_replace_compiler_option(CMAKE_CXX_FLAGS "/EHsc" "/EHs-c-")
-      add_definitions( /D_HAS_EXCEPTIONS=0 )
-    endif()
-  endif()
-  if( NOT LLVM_REQUIRES_RTTI )
-    if( LLVM_COMPILER_IS_GCC_COMPATIBLE )
-      llvm_replace_compiler_option(CMAKE_CXX_FLAGS "-frtti" "-fno-rtti")
-    elseif( MSVC )
-      llvm_replace_compiler_option(CMAKE_CXX_FLAGS "/GR" "/GR-")
-    endif()
-  endif()
-
-  set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" PARENT_SCOPE )
   set( ${OUT_VAR} ${sources} PARENT_SCOPE )
 endfunction(llvm_process_sources)