From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 40472 invoked by alias); 24 Apr 2017 21:11:13 -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 40461 invoked by uid 89); 24 Apr 2017 21:11:12 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-0.9 required=5.0 tests=BAYES_00,KAM_LAZY_DOMAIN_SECURITY,RP_MATCHES_RCVD,SPF_HELO_PASS autolearn=no version=3.3.2 spammy= 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 ESMTP; Mon, 24 Apr 2017 21:11:11 +0000 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2912C46D09C; Mon, 24 Apr 2017 21:11:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 2912C46D09C Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=law@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 2912C46D09C Received: from localhost.localdomain (ovpn-122-222.rdu2.redhat.com [10.10.122.222]) by smtp.corp.redhat.com (Postfix) with ESMTP id A15BC53CD6; Mon, 24 Apr 2017 21:11:11 +0000 (UTC) Subject: Re: PR79697: Delete calls to strdup, strndup, realloc if there is no lhs To: Prathamesh Kulkarni , gcc Patches , Richard Biener References: From: Jeff Law Message-ID: <97d19817-3f8c-27be-08a8-1bb23ffdba49@redhat.com> Date: Mon, 24 Apr 2017 21:21:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2017-04/txt/msg01070.txt.bz2 On 02/25/2017 01:40 AM, Prathamesh Kulkarni wrote: > Hi, > The attached patch deletes calls to strdup, strndup if it's > return-value is unused, > and same for realloc if the first arg is NULL. > Bootstrap+tested on x86_64-unknown-linux-gnu. > OK for GCC 8 ? > > Thanks, > Prathamesh > > > pr79697-1.txt > > > 2017-02-25 Prathamesh Kulkarni > > PR tree-optimization/79697 > * tree-ssa-dce.c (mark_stmt_if_obviously_necessary): Check if callee > is BUILT_IN_STRDUP, BUILT_IN_STRNDUP, BUILT_IN_REALLOC. > > testsuite/ > * gcc.dg/tree-ssa/pr79697.c: New test. OK for the trunk. jeff