re PR rtl-optimization/48381 (internal compiler error: in check_allocation, at ira.c:2094)

2011-03-31  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/48381
	* ira-color.c (assign_hard_reg): Use hard reg set intersection
	instead of ira_class_hard_reg_index for calculating conflicting
	hard registers.

From-SVN: r171795

gcc/ChangeLog

+2011-03-31  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/48381
+	* ira-color.c (assign_hard_reg): Use hard reg set intersection
+	instead of ira_class_hard_reg_index for calculating conflicting
+	hard registers.
+
 2011-03-31  Steven Bosscher  <steven@gcc.gnu.org>
 
 	* cprop.c: Clean up hash table building.

gcc/ira-color.c

@@ -1620,7 +1620,9 @@ assign_hard_reg (ira_allocno_t a, bool retry_p)
 	    {
 	      hard_regno = ALLOCNO_HARD_REGNO (conflict_a);
 	      if (hard_regno >= 0
-		  && ira_class_hard_reg_index[aclass][hard_regno] >= 0)
+		  && (ira_hard_reg_set_intersection_p
+		      (hard_regno, ALLOCNO_MODE (conflict_a),
+		       reg_class_contents[aclass])))
 		{
 		  int n_objects = ALLOCNO_NUM_OBJECTS (conflict_a);
 		  int conflict_nregs;