combine.c (simplify_shift_const): Always generate new rtx for shift expression…

combine.c (simplify_shift_const): Always generate new rtx for shift expression instead of reusing given expression.

* combine.c (simplify_shift_const): Always generate new rtx
  for shift expression instead of reusing given expression.

From-SVN: r48831

gcc/ChangeLog

+2002-01-14  Hartmut Penner  <hpenner@de.ibm.com>
+
+	* combine.c (simplify_shift_const): Always generate new rtx 
+	for shift expression instead of reusing given expression. 
+
 Mon Jan 14 07:08:55 2002  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
 	* config/alpha/alpha.c (alpha_expand_mov): Don't call

gcc/combine.c

@@ -9516,13 +9516,7 @@ simplify_shift_const (x, code, result_mode, varop, orig_count)
   if (new != 0)
     x = new;
   else
-    {
-      if (x == 0 || GET_CODE (x) != code || GET_MODE (x) != shift_mode)
-	x = gen_rtx_fmt_ee (code, shift_mode, varop, const_rtx);
-
-      SUBST (XEXP (x, 0), varop);
-      SUBST (XEXP (x, 1), const_rtx);
-    }
+    x = gen_rtx_fmt_ee (code, shift_mode, varop, const_rtx);
 
   /* If we have an outer operation and we just made a shift, it is
      possible that we could have simplified the shift were it not