From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17449 invoked by alias); 14 Jun 2011 09:37:36 -0000 Received: (qmail 17435 invoked by uid 22791); 14 Jun 2011 09:37:35 -0000 X-SWARE-Spam-Status: No, hits=-1.8 required=5.0 tests=AWL,BAYES_00,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from mail.codesourcery.com (HELO mail.codesourcery.com) (38.113.113.100) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 14 Jun 2011 09:37:17 +0000 Received: (qmail 17485 invoked from network); 14 Jun 2011 09:37:16 -0000 Received: from unknown (HELO ?84.152.182.51?) (bernds@127.0.0.2) by mail.codesourcery.com with ESMTPA; 14 Jun 2011 09:37:16 -0000 Message-ID: <4DF72BC4.5050306@codesourcery.com> Date: Tue, 14 Jun 2011 09:40:00 -0000 From: Bernd Schmidt User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110516 Lightning/1.0b3pre Thunderbird/3.1.10 MIME-Version: 1.0 To: Richard Guenther CC: Jakub Jelinek , gcc-patches@gcc.gnu.org Subject: Re: RFC: Fix GCSE exp_equiv_p on MEMs with different MEM_ATTRS (PR rtl-optimization/49390) References: <20110613184028.GW17079@tyan-ft48-01.lab.bos.redhat.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org X-SW-Source: 2011-06/txt/msg01020.txt.bz2 On 06/14/2011 10:43 AM, Richard Guenther wrote: > The patch that reverted the MEM_ATTR comparison didn't come > with a single testcase (ugh, I realize I approved it though ;)). > Bernd, do you have any testcases? It was a missed-optimization problem, but I think it only showed up with a modified ARM backend, and it was a set of changes I threw away in the end since I found a better fix. So, from that angle no objections if it's reverted. Judging from the variable names the testcase was 253.perlbmk/op.c, but I can't make the problem reappear at the moment - quite possibly because I'm not fully remembering what I had changed in arm.c. Bernd