re PR rtl-optimization/37263 (extra code for doloop with unsigned 32bit types on LP64)

2008-09-16  Andrew Pinski  <andrew_pinski@playstation.sony.com>

        PR middle-end/37263
        * tree-ssa-loop-ivopts.c (determine_use_iv_cost_condition): Prefer the
        eliminate IV if the cost are the same.

From-SVN: r140395

gcc/ChangeLog

+2008-09-16  Andrew Pinski  <andrew_pinski@playstation.sony.com>
+
+	PR middle-end/37263
+	* tree-ssa-loop-ivopts.c (determine_use_iv_cost_condition): Prefer the
+	eliminate IV if the cost are the same.
+
 2008-09-16  Richard Guenther  <rguenther@suse.de>
 
 	PR middle-end/37380

gcc/tree-ssa-loop-ivopts.c

@@ -3880,8 +3880,8 @@ determine_use_iv_cost_condition (struct ivopts_data *data,
   fd_ivopts_data = data;
   walk_tree (&cmp_iv->base, find_depends, &depends_on_express, NULL);
 
-  /* Choose the better approach.  */
-  if (compare_costs (elim_cost, express_cost) < 0)
+  /* Choose the better approach, preferring the eliminated IV. */
+  if (compare_costs (elim_cost, express_cost) <= 0)
     {
       cost = elim_cost;
       depends_on = depends_on_elim;