From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 71522 invoked by alias); 26 Oct 2015 15:25:44 -0000 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 Received: (qmail 71509 invoked by uid 89); 26 Oct 2015 15:25:41 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.0 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 X-HELO: mail-yk0-f173.google.com Received: from mail-yk0-f173.google.com (HELO mail-yk0-f173.google.com) (209.85.160.173) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-GCM-SHA256 encrypted) ESMTPS; Mon, 26 Oct 2015 15:25:40 +0000 Received: by ykba4 with SMTP id a4so181100321ykb.3 for ; Mon, 26 Oct 2015 08:25:38 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.129.76.14 with SMTP id z14mr13866538ywa.263.1445873138220; Mon, 26 Oct 2015 08:25:38 -0700 (PDT) Received: by 10.37.117.136 with HTTP; Mon, 26 Oct 2015 08:25:37 -0700 (PDT) In-Reply-To: <20151022095822.GA20031@linux.vnet.ibm.com> References: <20151022095822.GA20031@linux.vnet.ibm.com> Date: Mon, 26 Oct 2015 15:34:00 -0000 Message-ID: Subject: Re: [PATCH] Fix PR67443 From: Richard Biener To: vogt@linux.vnet.ibm.com, GCC Patches Content-Type: text/plain; charset=UTF-8 X-IsSubscribed: yes X-SW-Source: 2015-10/txt/msg02765.txt.bz2 On Thu, Oct 22, 2015 at 11:58 AM, Dominik Vogt wrote: >> Eventually we'll get another testcase so I'll leave this for >> comments a while and will commit somewhen later this week. > > In case you're referring to my attempt to port the test case to > x86: All the efforts to reproduce the bug on x86 have failed so > far. It seems that Gcc is much better in handling bit filed > accesses on little endian targets (x86) than on big endian > (s390[x], power). In other words, on x86 earlier optimisations > prevent the dse2 pass from having to deal with the problematic > situation. So, don't wait for me coming up with more test cases; > I'll keep trying, but I'm pessimistic. Now applied to trunk. Richard. > Ciao > > Dominik ^_^ ^_^ > > -- > > Dominik Vogt > IBM Germany >