From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 127115 invoked by alias); 17 Dec 2015 18:05:44 -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 127104 invoked by uid 89); 17 Dec 2015 18:05:43 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.3 required=5.0 tests=AWL,BAYES_00,KAM_LAZY_DOMAIN_SECURITY,SPF_HELO_PASS,T_RP_MATCHES_RCVD autolearn=no version=3.3.2 spammy=underestimated X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-GCM-SHA384 encrypted) ESMTPS; Thu, 17 Dec 2015 18:05:42 +0000 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id 3657AC0B7E18; Thu, 17 Dec 2015 18:05:41 +0000 (UTC) Received: from localhost.localdomain (vpn1-5-42.ams2.redhat.com [10.36.5.42]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id tBHI5deg018248; Thu, 17 Dec 2015 13:05:40 -0500 Subject: Re: [PATCH][combine][RFC][2/2] PR rtl-optimization/68796: Perfer zero_extract comparison against zero rather than unsupported shorter modes To: Kyrill Tkachov , Segher Boessenkool References: <5672D68F.3030408@foss.arm.com> <5672DB97.7090800@redhat.com> <5672DE74.7080802@foss.arm.com> <5672DEE0.8000509@redhat.com> <20151217172732.GA20301@gate.crashing.org> <5672F474.5070306@foss.arm.com> Cc: GCC Patches From: Bernd Schmidt Message-ID: <5672F973.70806@redhat.com> Date: Thu, 17 Dec 2015 18:05:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <5672F474.5070306@foss.arm.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2015-12/txt/msg01804.txt.bz2 On 12/17/2015 06:44 PM, Kyrill Tkachov wrote: > Perhaps I had underestimated how involved this issue is :) > So if I want to improve the aarch64 situation for GCC 6, > would the recommended course of action be to just define the > QI and HImode compare against zero patterns? For GCC 6 I think this is the only approach. Bernd