From patchwork Mon Jul  5 16:05:14 2010
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Patchwork-Submitter: Richard Biener <rguenther@suse.de>
X-Patchwork-Id: 57920
Return-Path: 
 <gcc-patches-return-267391-incoming=patchwork.ozlabs.org@gcc.gnu.org>
X-Original-To: incoming@patchwork.ozlabs.org
Delivered-To: patchwork-incoming@bilbo.ozlabs.org
Received: from sourceware.org (server1.sourceware.org [209.132.180.131])
	by ozlabs.org (Postfix) with SMTP id 1C1D3B6EFE
	for <incoming@patchwork.ozlabs.org>;
	Tue,  6 Jul 2010 02:05:30 +1000 (EST)
Received: (qmail 29974 invoked by alias); 5 Jul 2010 16:05:26 -0000
Received: (qmail 29854 invoked by uid 22791); 5 Jul 2010 16:05:25 -0000
X-SWARE-Spam-Status: No, hits=-3.4 required=5.0	tests=AWL, BAYES_00,
	T_RP_MATCHES_RCVD
X-Spam-Check-By: sourceware.org
Received: from cantor2.suse.de (HELO mx2.suse.de) (195.135.220.15) by
	sourceware.org (qpsmtpd/0.43rc1) with ESMTP;
	Mon, 05 Jul 2010 16:05:16 +0000
Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.221.2])	by
	mx2.suse.de (Postfix) with ESMTP id 931748726A	for
	<gcc-patches@gcc.gnu.org>; Mon,  5 Jul 2010 18:05:14 +0200 (CEST)
Date: Mon, 5 Jul 2010 18:05:14 +0200 (CEST)
From: Richard Guenther <rguenther@suse.de>
To: gcc-patches@gcc.gnu.org
Subject: [PATCH] Preserve even more alais info with IVOPTs
Message-ID: <alpine.LNX.2.00.1007051804470.1429@zhemvz.fhfr.qr>
User-Agent: Alpine 2.00 (LNX 1167 2008-08-23)
MIME-Version: 1.0
Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-patches.gcc.gnu.org>
List-Unsubscribe: 
 <mailto:gcc-patches-unsubscribe-incoming=patchwork.ozlabs.org@gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>
List-Post: <mailto:gcc-patches@gcc.gnu.org>
List-Help: <mailto:gcc-patches-help@gcc.gnu.org>
Sender: gcc-patches-owner@gcc.gnu.org
Delivered-To: mailing list gcc-patches@gcc.gnu.org

Bootstrapped and tested on x86_64-unknown-linux-gnu, committed.

Richard.

2010-07-05  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-loop-ivopts.c (rewrite_use_nonlinear_expr): Copy
	alias info.

Index: gcc/tree-ssa-loop-ivopts.c
===================================================================
--- gcc/tree-ssa-loop-ivopts.c	(revision 161840)
+++ gcc/tree-ssa-loop-ivopts.c	(working copy)
@@ -5486,8 +5486,12 @@ rewrite_use_nonlinear_expr (struct ivopt
 	     to still.  */
 	  && (get_gimple_rhs_num_ops (TREE_CODE (comp))
 	      >= gimple_num_ops (gsi_stmt (bsi)))))
-    comp = force_gimple_operand_gsi (&bsi, comp, false, SSA_NAME_VAR (tgt),
-				     true, GSI_SAME_STMT);
+    {
+      comp = force_gimple_operand_gsi (&bsi, comp, true, NULL_TREE,
+				       true, GSI_SAME_STMT);
+      if (POINTER_TYPE_P (TREE_TYPE (tgt)))
+	duplicate_ssa_name_ptr_info (comp, SSA_NAME_PTR_INFO (tgt));
+    }
 
   if (gimple_code (use->stmt) == GIMPLE_PHI)
     {