[PATCH] Use c_common_type_for_size from the C frontend

[Richard Guenther]

I'll apply this as obvious after including it in a bootstrap / regtest.

Richard.

2012-03-07  Richard Guenther  <rguent...@suse.de>

        * c-typeck.c (pointer_diff): Use c_common_type_for_size.

Index: gcc/c-typeck.c
===================================================================
--- gcc/c-typeck.c      (revision 185029)
+++ gcc/c-typeck.c      (working copy)
@@ -3413,8 +3410,7 @@ pointer_diff (location_t loc, tree op0,
      be the same as the result type (ptrdiff_t), but may need to be a wider
      type if pointers for the address space are wider than ptrdiff_t.  */
   if (TYPE_PRECISION (restype) < TYPE_PRECISION (TREE_TYPE (op0)))
-    inttype = lang_hooks.types.type_for_size
-               (TYPE_PRECISION (TREE_TYPE (op0)), 0);
+    inttype = c_common_type_for_size (TYPE_PRECISION (TREE_TYPE (op0)), 0);
   else
     inttype = restype;