[lto] Use num_parm_types and nth_parm_type in no_linkage_check.

[Kazu Hirata <kazu at codesourcery dot com>]

Hi,

Attached is a patch to use num_parm_types and nth_parm_type in
no_linkage_check.

The only notable point is that this patch yanks out the check for
void_type_node.

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

Kazu Hirata

2006-06-29  Kazu Hirata  <kazu@codesourcery.com>

	* tree.c (no_linkage_check): Use num_parm_types and
	nth_parm_type.

Index: cp/tree.c
===================================================================
*** cp/tree.c	(revision 115049)
--- cp/tree.c	(working copy)
*************** no_linkage_check (tree t, bool relaxed_p
*** 1112,1123 ****
        /* Fall through.  */
      case FUNCTION_TYPE:
        {
! 	tree parm;
! 	for (parm = TYPE_ARG_TYPES (t);
! 	     parm && parm != void_list_node;
! 	     parm = TREE_CHAIN (parm))
  	  {
! 	    r = no_linkage_check (TREE_VALUE (parm), relaxed_p);
  	    if (r)
  	      return r;
  	  }
--- 1112,1130 ----
        /* Fall through.  */
      case FUNCTION_TYPE:
        {
! 	tree parm_types = TYPE_ARG_TYPES (t);
! 	int len = num_parm_types (parm_types);
! 	int i;
! 
! 	if (len
! 	    && nth_parm_type (parm_types, len - 1) == void_type_node)
! 	  len--;
! 
! 	for (i = 0; i < len; i++)
  	  {
! 	    tree type = nth_parm_type (parm_types, i);
! 
! 	    r = no_linkage_check (type, relaxed_p);
  	    if (r)
  	      return r;
  	  }