builtins.c (std_canonical_va_list): Treat structure based va_list types.

2008-07-15  Kai Tietz  <kai.tietz@onevision.com>

	* builtins.c (std_canonical_va_list): Treat structure based
	va_list types.

From-SVN: r137819

gcc/ChangeLog

+2008-07-15  Kai Tietz  <kai.tietz@onevision.com>
+
+	* builtins.c (std_canonical_va_list): Treat structure based
+	va_list types.
+
 2008-07-15  Ben Elliston  <bje@au.ibm.com>
 
 	* emit-rtl.c (set_mem_attributes_minus_bitpos): Improve comment.

gcc/builtins.c

@@ -4691,10 +4691,12 @@ std_canonical_va_list_type (tree type)
     type = TREE_TYPE (type);
   else if (POINTER_TYPE_P (type) && POINTER_TYPE_P (TREE_TYPE(type)))
     type = TREE_TYPE (type);
-
   wtype = va_list_type_node;
   htype = type;
-  if (TREE_CODE (wtype) == ARRAY_TYPE)
+  /* Treat structure va_list types.  */
+  if (TREE_CODE (wtype) == RECORD_TYPE && POINTER_TYPE_P (htype))
+    htype = TREE_TYPE (htype);
+  else if (TREE_CODE (wtype) == ARRAY_TYPE)
     {
       /* If va_list is an array type, the argument may have decayed
 	 to a pointer type, e.g. by being passed to another function.