No longer defining GNUC mode when compiling for Microsoft compatibility.  This allows people's cross-platform compiler-specific macros to work properly.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@152512 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/predefined-macros.c b/test/Preprocessor/predefined-macros.c
index 5b03872..8ec4d7e 100644
--- a/test/Preprocessor/predefined-macros.c
+++ b/test/Preprocessor/predefined-macros.c
@@ -8,6 +8,7 @@
 // CHECK-MS: #define _M_IX86 600
 // CHECK-MS: #define _M_IX86_FP
 // CHECK-MS: #define _WIN32 1
+// CHECK-MS-NOT: #define __GNUC__
 //
 // RUN: %clang_cc1 %s -E -dM -ffast-math -o - \
 // RUN:   | FileCheck %s --check-prefix=CHECK-FAST-MATH