cmake: don't set LLVM_COMPILER_IS_GCC_COMPATIBLE when using clang-cl

[oota-llvm.git] / cmake / modules / HandleLLVMOptions.cmake

diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
index b49d6496125030778e47712fc4075cbc0bfbdcbc..2cec270e96ddb63a2fdc3eb20aad463c74e5307c 100644 (file)
--- a/cmake/modules/HandleLLVMOptions.cmake
+++ b/cmake/modules/HandleLLVMOptions.cmake
@@ -8,6 +8,8 @@ include(CheckCXXCompilerFlag)
 
 if( CMAKE_COMPILER_IS_GNUCXX )
   set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
+elseif( MSVC )
+  set(LLVM_COMPILER_IS_GCC_COMPATIBLE OFF)
 elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
   set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
 endif()
@@ -240,6 +242,10 @@ macro(append_common_sanitizer_flags)
       NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
     add_flag_if_supported("-gline-tables-only")
   endif()
+  # Use -O1 even in debug mode, otherwise sanitizers slowdown is too large.
+  if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
+    add_flag_if_supported("-O1")
+  endif()
 endmacro()
 
 # Turn on sanitizers if necessary.