char16_t and char32_t are defined via typedef in MSVC 11 RC. So introduce a way to disable keywords under Microsoft mode.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160612 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/IdentifierTable.cpp b/lib/Basic/IdentifierTable.cpp
index 6981455..96d09a6 100644
--- a/lib/Basic/IdentifierTable.cpp
+++ b/lib/Basic/IdentifierTable.cpp
@@ -103,7 +103,8 @@
     KEYOPENCL = 0x200,
     KEYC11 = 0x400,
     KEYARC = 0x800,
-    KEYALL = 0x0fff
+    KEYALL = 0x0fff,
+    KEYNOMS = 0x1000
   };
 }
 
@@ -136,6 +137,9 @@
   else if (LangOpts.ObjC2 && (Flags & KEYARC)) AddResult = 2;
   else if (LangOpts.CPlusPlus && (Flags & KEYCXX0X)) AddResult = 3;
 
+  // Don't add this keyword under MicrosoftMode.
+  if (LangOpts.MicrosoftMode && (Flags & KEYNOMS))
+     return;
   // Don't add this keyword if disabled in this language.
   if (AddResult == 0) return;