ira-lives.c (process_single_reg_class_operands): Update the hard reg costs for…

ira-lives.c (process_single_reg_class_operands): Update the hard reg costs for all the hard registers desired by the single reg...

	* ira-lives.c (process_single_reg_class_operands): Update the 
	hard reg costs for all the hard registers desired by the single
	reg class operand.

From-SVN: r153487

gcc/ChangeLog

+2009-10-22  Jeff Law  <law@redhat.com>
+
+	* ira-lives.c (process_single_reg_class_operands): Update the 
+	hard reg costs for all the hard registers desired by the
+	single reg class operand.
+
 2009-10-22  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* simplify-rtx.c (simplify_replace_fn_rtx): Add a fallback case

gcc/ira-lives.c

@@ -841,6 +841,7 @@ process_single_reg_class_operands (bool in_p, int freq)
 		  [ira_class_hard_regs[cl][0]]) >= 0
 	      && reg_class_size[cl] <= (unsigned) CLASS_MAX_NREGS (cl, mode))
 	    {
+	      int i, size;
 	      cost
 		= (freq
 		   * (in_p
@@ -848,10 +849,12 @@ process_single_reg_class_operands (bool in_p, int freq)
 		      : ira_get_register_move_cost (mode, cl, cover_class)));
 	      ira_allocate_and_set_costs
 		(&ALLOCNO_CONFLICT_HARD_REG_COSTS (operand_a), cover_class, 0);
-	      ALLOCNO_CONFLICT_HARD_REG_COSTS (operand_a)
-		[ira_class_hard_reg_index
-		 [cover_class][ira_class_hard_regs[cl][0]]]
-		-= cost;
+	      size = ira_reg_class_nregs[cover_class][mode];
+	      for (i = 0; i < size; i++)
+	        ALLOCNO_CONFLICT_HARD_REG_COSTS (operand_a)
+		  [ira_class_hard_reg_index
+		   [cover_class][ira_class_hard_regs[cl][i]]]
+		  -= cost;
 	    }
 	}