Index: test/Parser/MicrosoftExtensions.c
===================================================================
--- test/Parser/MicrosoftExtensions.c
+++ test/Parser/MicrosoftExtensions.c
@@ -20,15 +20,12 @@
 
 void __forceinline InterlockedBitTestAndSet (long *Base, long Bit)
 {
-  // FIXME: Re-enable this once MS inline asm stabilizes.
-#if 0
   __asm {
     mov eax, Bit
     mov ecx, Base
     lock bts [ecx], eax
     setc al
   };
-#endif
 }
 
 // Both inline and __forceinline is OK.