re PR rtl-optimization/30841 (Missed optimizations for sbi/cbi instructions)

2007-02-22  Paolo Bonzini  <bonzini@gnu.org>

	PR rtl-optimization/30841
        * fwprop.c (propagate_rtx_1): Accept a VOIDmode replacement address.

From-SVN: r122253

gcc/ChangeLog

+2007-02-22  Paolo Bonzini  <bonzini@gnu.org>
+
+	PR rtl-optimization/30841
+        * fwprop.c (propagate_rtx_1): Accept a VOIDmode replacement address.
+
 2007-02-22  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* builtins.c (fold_builtin_frexp): New.

gcc/fwprop.c

@@ -324,7 +324,8 @@ propagate_rtx_1 (rtx *px, rtx old, rtx new, bool can_appear)
 	  /* Dismiss transformation that we do not want to carry on.  */
 	  if (!valid_ops
 	      || new_op0 == op0
-	      || GET_MODE (new_op0) != GET_MODE (op0))
+	      || !(GET_MODE (new_op0) == GET_MODE (op0)
+		   || GET_MODE (new_op0) == VOIDmode))
 	    return true;
 
 	  canonicalize_address (new_op0);