Replace a comparison with a static list of builtins that was wrong (it
wasn't covering checking builtins like __builtin___vsnprintf_chk) with
a check that won't get out of date. 


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@56767 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index db1a7ae..9d3947b 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -194,10 +194,7 @@
                                       Scope *S) {
   Builtin::ID BID = (Builtin::ID)bid;
 
-  if (BID == Builtin::BI__builtin_va_start ||
-      BID == Builtin::BI__builtin_va_copy ||
-      BID == Builtin::BI__builtin_va_end ||
-      BID == Builtin::BI__builtin_stdarg_start)
+  if (Context.BuiltinInfo.hasVAListUse(BID))
     InitBuiltinVaListType();
     
   QualType R = Context.BuiltinInfo.GetBuiltinType(BID, Context);