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a patch to fix PR 48367

Message ID 4D93D56E.8060906@redhat.com
State New
Headers show

Commit Message

Vladimir Makarov March 31, 2011, 1:14 a.m. UTC 
The following patch solves the problem.  The reason for the problem is 
described on

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48367

The patch has been committed as obvious.

2011-03-30  Vladimir Makarov <vmakarov@redhat.com>

         PR middle-end/48367
         * ira-costs.c (find_costs_and_classes): Fix a typo in i_mem_cost
         calculation.
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Patch

Index: ira-costs.c
===================================================================
--- ira-costs.c (revision 171649)
+++ ira-costs.c (working copy)
@@ -1652,7 +1652,7 @@  find_costs_and_classes (FILE *dump_file)
                         i_costs[k] += add_cost;
                     }
                   add_cost = COSTS (costs, a_num)->mem_cost;
-                 if (add_cost && INT_MAX - add_cost < i_mem_cost)
+                 if (add_cost > 0 && INT_MAX - add_cost < i_mem_cost)
                     i_mem_cost = INT_MAX;
                   else
                     i_mem_cost += add_cost;
@@ -1887,7 +1887,7 @@  process_bb_node_for_hard_reg_moves (ira_
        ALLOCNO_HARD_REG_COSTS (a)[i] -= cost;
        ALLOCNO_CONFLICT_HARD_REG_COSTS (a)[i] -= cost;
        ALLOCNO_CLASS_COST (a) = MIN (ALLOCNO_CLASS_COST (a),
-                                         ALLOCNO_HARD_REG_COSTS (a)[i]);
+                                   ALLOCNO_HARD_REG_COSTS (a)[i]);
      }
  }