[X86] Rename DEFAULT_FN_ATTR macro to __DEFAULT_FN_ATTR

llvm-svn: 241065
diff --git a/clang/lib/Headers/popcntintrin.h b/clang/lib/Headers/popcntintrin.h
index fede8da..29c074b 100644
--- a/clang/lib/Headers/popcntintrin.h
+++ b/clang/lib/Headers/popcntintrin.h
@@ -25,22 +25,22 @@
 #define _POPCNTINTRIN_H
 
 /* Define the default attributes for the functions in this file. */
-#define DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("popcnt")))
+#define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("popcnt")))
 
-static __inline__ int DEFAULT_FN_ATTRS
+static __inline__ int __DEFAULT_FN_ATTRS
 _mm_popcnt_u32(unsigned int __A)
 {
   return __builtin_popcount(__A);
 }
 
 #ifdef __x86_64__
-static __inline__ long long DEFAULT_FN_ATTRS
+static __inline__ long long __DEFAULT_FN_ATTRS
 _mm_popcnt_u64(unsigned long long __A)
 {
   return __builtin_popcountll(__A);
 }
 #endif /* __x86_64__ */
 
-#undef DEFAULT_FN_ATTRS
+#undef __DEFAULT_FN_ATTRS
 
 #endif /* _POPCNTINTRIN_H */