reload.c (dup_replacements): New function.

	* reload.c (dup_replacements): New function.
	(find_reloads): Use it to duplicate replacements at the top level
	of match_dup operands.

From-SVN: r57542

gcc/ChangeLog

+2002-09-26  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* reload.c (dup_replacements): New function.
+	(find_reloads): Use it to duplicate replacements at the top level
+	of match_dup operands.
+
 2002-09-26  Miles Bader  <miles@gnu.org>
 
 	* v850.md ("length"): Change default value to 4.

gcc/reload.c

@@ -244,6 +244,7 @@ static enum reg_class find_valid_class PARAMS ((enum machine_mode, int,
 						unsigned int));
 static int reload_inner_reg_of_subreg PARAMS ((rtx, enum machine_mode));
 static void push_replacement	PARAMS ((rtx *, int, enum machine_mode));
+static void dup_replacements	PARAMS ((rtx *, rtx *));
 static void combine_reloads	PARAMS ((void));
 static int find_reusable_reload	PARAMS ((rtx *, rtx, enum reg_class,
 				       enum reload_type, int, int));
@@ -1563,6 +1564,25 @@ push_replacement (loc, reloadnum, mode)
       r->mode = mode;
     }
 }
+
+/* Duplicate any replacement we have recorded to apply at
+   location ORIG_LOC to also be performed at DUP_LOC.
+   This is used in insn patterns that use match_dup.  */
+
+static void
+dup_replacements (dup_loc, orig_loc)
+     rtx *dup_loc;
+     rtx *orig_loc;
+{
+  int i, n = n_replacements;
+
+  for (i = 0; i < n; i++)
+    {
+      struct replacement *r = &replacements[i];
+      if (r->where == orig_loc)
+	push_replacement (dup_loc, r->what, r->mode);
+    }
+}
 
 /* Transfer all replacements that used to be in reload FROM to be in
    reload TO.  */
@@ -3979,9 +3999,7 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p)
       {
 	int opno = recog_data.dup_num[i];
 	*recog_data.dup_loc[i] = *recog_data.operand_loc[opno];
-	if (operand_reloadnum[opno] >= 0)
-	  push_replacement (recog_data.dup_loc[i], operand_reloadnum[opno],
-			    insn_data[insn_code_number].operand[opno].mode);
+	dup_replacements (recog_data.dup_loc[i], recog_data.operand_loc[opno]);
       }
 
 #if 0