From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 35972 invoked by alias); 29 Sep 2016 08:02:33 -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 35954 invoked by uid 89); 29 Sep 2016 08:02:32 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.8 required=5.0 tests=AWL,BAYES_00,KAM_LAZY_DOMAIN_SECURITY,RP_MATCHES_RCVD autolearn=ham version=3.3.2 spammy= X-HELO: albireo.enyo.de Received: from albireo.enyo.de (HELO albireo.enyo.de) (5.158.152.32) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Thu, 29 Sep 2016 08:02:30 +0000 Received: from [172.17.203.2] (helo=deneb.enyo.de) by albireo.enyo.de with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1bpWIT-0000ir-Fu; Thu, 29 Sep 2016 10:02:25 +0200 Received: from fw by deneb.enyo.de with local (Exim 4.84_2) (envelope-from ) id 1bpWIT-0000A9-CR; Thu, 29 Sep 2016 10:02:25 +0200 From: Florian Weimer To: Denys Vlasenko Cc: gcc-patches@gcc.gnu.org, Andrew Pinski , Uros Bizjak , Bernd Schmidt Subject: Re: [PATCH 2/2] Extend -falign-FOO=N to N[,M[,N2[,M2]]] References: <20160928125704.29624-1-dvlasenk@redhat.com> <20160928125704.29624-3-dvlasenk@redhat.com> Date: Thu, 29 Sep 2016 08:27:00 -0000 In-Reply-To: <20160928125704.29624-3-dvlasenk@redhat.com> (Denys Vlasenko's message of "Wed, 28 Sep 2016 14:57:04 +0200") Message-ID: <87ponn9lri.fsf@mid.deneb.enyo.de> MIME-Version: 1.0 Content-Type: text/plain X-IsSubscribed: yes X-SW-Source: 2016-09/txt/msg02215.txt.bz2 * Denys Vlasenko: > Example syntax is -falign-functions=64,9: "align to 64 by skipping up to > 9 bytes (not inclusive)". IOW: "after a call insn, CPU will always be able > to fetch at least 9 bytes of insns". Is it possible to set this using the optimize function attribute? For example, we could use this to reduce alignment for compat functions in glibc.