decl.c (duplicate_decls): Use DECL_IS_BUILTIN rather than test DECL_SOURCE_LOCATION directly.

	* decl.c (duplicate_decls): Use DECL_IS_BUILTIN rather than test
	DECL_SOURCE_LOCATION directly.

From-SVN: r160806

gcc/cp/ChangeLog

 2010-06-15  Jason Merrill  <jason@redhat.com>
 
+	* decl.c (duplicate_decls): Use DECL_IS_BUILTIN rather than test
+	DECL_SOURCE_LOCATION directly.
+
 	* class.c (type_has_user_provided_default_constructor): Use
 	sufficient_parms_p.
 

gcc/cp/decl.c

@@ -1295,7 +1295,7 @@ duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
       /* Even if the types match, prefer the new declarations type for
 	 built-ins which have not been explicitly declared, for
 	 exception lists, etc...  */
-      else if (DECL_SOURCE_LOCATION (olddecl) == BUILTINS_LOCATION)
+      else if (DECL_IS_BUILTIN (olddecl))
 	{
 	  tree type = TREE_TYPE (newdecl);
 	  tree attribs = (*targetm.merge_type_attributes)