[PATCH] Fix IPA-SRA function type cloning

[Richard Guenther]

We can't use copy_node, that copies TYPE_POINTER_TO chains which
causes wrong pointer types for the new call exprs.

Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.

Richard.

2010-07-30  Richard Guenther  <rguenther@suse.de>

	* ipa-prop.c (ipa_modify_formal_parameters): Use
	build_distinct_type_copy.

Index: gcc/ipa-prop.c
===================================================================
*** gcc/ipa-prop.c	(revision 162680)
--- gcc/ipa-prop.c	(working copy)
*************** ipa_modify_formal_parameters (tree fndec
*** 2077,2083 ****
         || (VEC_index (ipa_parm_adjustment_t, adjustments, 0)->copy_param
  	 && VEC_index (ipa_parm_adjustment_t, adjustments, 0)->base_index == 0))
      {
!       new_type = copy_node (orig_type);
        TYPE_ARG_TYPES (new_type) = new_reversed;
      }
    else
--- 2077,2083 ----
         || (VEC_index (ipa_parm_adjustment_t, adjustments, 0)->copy_param
  	 && VEC_index (ipa_parm_adjustment_t, adjustments, 0)->base_index == 0))
      {
!       new_type = build_distinct_type_copy (orig_type);
        TYPE_ARG_TYPES (new_type) = new_reversed;
      }
    else