[lto] Use num_parm_types, nth_parm_type, and num_artificial_parms_for in grokdeclarator.

[Kazu Hirata]

Hi,

Tested on x86_64-pc-linux-gnu.  Committed to the LTO branch as
obvious.

Kazu Hirata

2006-07-08  Kazu Hirata  <kazu@codesourcery.com>

	* decl.c (grokdeclarator): Use num_parm_types, nth_parm_type,
	and num_artificial_parms_for in grokdeclarator.

Index: cp/decl.c
===================================================================
--- cp/decl.c	(revision 115203)
+++ cp/decl.c	(working copy)
@@ -8266,13 +8266,15 @@ grokdeclarator (const cp_declarator *dec
 		   parameter if there is at least one parameter, and
 		   any subsequent parameters have default arguments.
 		   Ignore any compiler-added parms.  */
-		tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
+		tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
 		tree parm_decls = FUNCTION_FIRST_USER_PARM (decl);
+		int skip = num_artificial_parms_for (decl);
+		int len = num_parm_types (arg_types);
 
-		if (arg_types == void_list_node
-		    || (arg_types
-			&& TREE_CHAIN (arg_types)
-			&& TREE_CHAIN (arg_types) != void_list_node
+		if ((skip + 1 == len
+		     && nth_parm_type (arg_types, skip) == void_type_node)
+		    || (skip + 1 < len
+			&& nth_parm_type (arg_types, skip + 1) != void_type_node
 			&& !DECL_INITIAL (TREE_CHAIN (parm_decls))))
 		  DECL_NONCONVERTING_P (decl) = 1;
 	      }