re PR tree-optimization/48129 (gcc.c-torture/execute/builtins/snprintf-chk.c ICE)

	PR tree-optimization/48129
	* builtins.c (fold_builtin_snprintf): Convert to type of
	built_in_decls[BUILT_IN_SNPRINTF] retval instead of
	implicit_built_in_decls[BUILT_IN_SNPRINTF] retval.

From-SVN: r170985

gcc/ChangeLog

+2011-03-15  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/48129
+	* builtins.c (fold_builtin_snprintf): Convert to type of
+	built_in_decls[BUILT_IN_SNPRINTF] retval instead of
+	implicit_built_in_decls[BUILT_IN_SNPRINTF] retval.
+
 2011-03-15  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/41490

gcc/builtins.c

@@ -12038,9 +12038,8 @@ fold_builtin_snprintf (location_t loc, tree dest, tree destsize, tree fmt,
 
   if (call && retval)
     {
-      retval = fold_convert_loc
-	(loc, TREE_TYPE (TREE_TYPE (implicit_built_in_decls[BUILT_IN_SNPRINTF])),
-	 retval);
+      tree fn = built_in_decls[BUILT_IN_SNPRINTF];
+      retval = fold_convert_loc (loc, TREE_TYPE (TREE_TYPE (fn)), retval);
       return build2 (COMPOUND_EXPR, TREE_TYPE (retval), call, retval);
     }
   else