From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 123686 invoked by alias); 6 Jun 2017 17:47:56 -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 123663 invoked by uid 89); 6 Jun 2017 17:47:55 -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,SPF_HELO_PASS,T_RP_MATCHES_RCVD autolearn=no version=3.3.2 spammy=degree 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; Tue, 06 Jun 2017 17:47:54 +0000 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3AC1A85359; Tue, 6 Jun 2017 17:47:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 3AC1A85359 Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=law@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 3AC1A85359 Received: from localhost.localdomain (ovpn-116-94.phx2.redhat.com [10.3.116.94]) by smtp.corp.redhat.com (Postfix) with ESMTP id 00B8558840; Tue, 6 Jun 2017 17:47:56 +0000 (UTC) Subject: Re: [PATCH GCC][5/5]Enable tree loop distribution at -O3 and above optimization levels. To: Bin Cheng , "gcc-patches@gcc.gnu.org" Cc: nd References: From: Jeff Law Message-ID: <71dace72-d755-8519-fde4-5dd382641192@redhat.com> Date: Tue, 06 Jun 2017 17:47:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2017-06/txt/msg00366.txt.bz2 On 06/02/2017 05:52 AM, Bin Cheng wrote: > Hi, > This patch enables -ftree-loop-distribution by default at -O3 and above optimization levels. > Bootstrap and test at O2/O3 on x86_64 and AArch64. is it OK? > > Note I don't have strong opinion here and am fine with either it's accepted or rejected. > > Thanks, > bin > 2017-05-31 Bin Cheng > > * opts.c (default_options_table): Enable OPT_ftree_loop_distribution > for -O3 and above levels. I think the question is how does this generally impact the performance of the generated code and to a lesser degree compile-time. Do you have any performance data? jeff