loop.c (check_dbra_loop): While reversing the loop...

        * loop.c (check_dbra_loop): While reversing the loop, if the
        comparison value has a VOID mode use the mode of the other operand
        to compute the mask.

From-SVN: r24444

gcc/ChangeLog

+1998-12-30  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>
+
+	* loop.c (check_dbra_loop): While reversing the loop, if the
+	comparison value has a VOID mode use the mode of the other operand
+	to compute the mask.
+
 Wed Dec 30 22:24:00 1998  Michael Meissner  <meissner@cygnus.com>
 
 	* rs6000.md ({save,restore}_stack_function): Take 2 operands to

gcc/loop.c

@@ -6857,8 +6857,12 @@ check_dbra_loop (loop_end, insn_count, loop_start, loop_info)
 
 	      add_val = INTVAL (bl->biv->add_val);
 	      comparison_value = XEXP (comparison, 1);
-	      comparison_const_width
-		= GET_MODE_BITSIZE (GET_MODE (XEXP (comparison, 1)));
+	      if (GET_MODE (comparison_value) == VOIDmode)
+		comparison_const_width
+		  = GET_MODE_BITSIZE (GET_MODE (XEXP (comparison, 0)));
+	      else
+		comparison_const_width
+		  = GET_MODE_BITSIZE (GET_MODE (comparison_value));
 	      if (comparison_const_width > HOST_BITS_PER_WIDE_INT)
 		comparison_const_width = HOST_BITS_PER_WIDE_INT;
 	      comparison_sign_mask