re PR c/36021 (__attribute__((alloc_size(n))) with function of no arguments causes gcc to segfault)

2008-04-23  Richard Guenther  <rguenther@suse.de>

	PR middle-end/36021
	* c-common.c (handle_alloc_size_attribute): Use type_num_arguments.

	* gcc.dg/attr-alloc_size-2.c: New testcase.

From-SVN: r134595

gcc/ChangeLog

+2008-04-23  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/36021
+	* c-common.c (handle_alloc_size_attribute): Use type_num_arguments.
+
 2008-04-22  Tomas Bily  <tbily@suse.cz>
 
         * tree-cfg.c (verify_expr): Check for NON_LVALUE_EXPR as unreachable

gcc/c-common.c

@@ -5941,12 +5941,7 @@ static tree
 handle_alloc_size_attribute (tree *node, tree ARG_UNUSED (name), tree args,
 			     int ARG_UNUSED (flags), bool *no_add_attrs)
 {
-  tree params = TYPE_ARG_TYPES (*node);
-  unsigned arg_count = 0;
-
-  for (; TREE_CHAIN (params); params = TREE_CHAIN (params))
-    arg_count ++;
-
+  unsigned arg_count = type_num_arguments (*node);
   for (; args; args = TREE_CHAIN (args))
     {
       tree position = TREE_VALUE (args);

gcc/testsuite/ChangeLog

+2008-04-23  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/36021
+	* gcc.dg/attr-alloc_size-2.c: New testcase.
+
 2008-04-23  Kai Tietz  <kai.tietz@onevision.com>
 
 	* gcc.dg/20020919-1.c (loc_size_t): New type.

gcc/testsuite/gcc.dg/attr-alloc_size-2.c

+/* { dg-do compile } */
+
+char *foo() __attribute__((alloc_size(1))); /* { dg-warning "outside range" } */
+