From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 66091 invoked by alias); 8 Sep 2016 17:52:06 -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 66076 invoked by uid 89); 8 Sep 2016 17:52:05 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.2 required=5.0 tests=BAYES_00,KAM_LAZY_DOMAIN_SECURITY,RP_MATCHES_RCVD,SPF_HELO_PASS autolearn=ham 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; Thu, 08 Sep 2016 17:51:55 +0000 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6B7FBC04D2BD; Thu, 8 Sep 2016 17:51:54 +0000 (UTC) Received: from localhost.localdomain (ovpn-116-111.phx2.redhat.com [10.3.116.111]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u88HpsT9021783; Thu, 8 Sep 2016 13:51:54 -0400 Subject: Re: [PATCH 4/9] regrename: Don't rename restores To: Segher Boessenkool , gcc-patches@gcc.gnu.org References: <3d1c2c877df1da0be9eca7cb1016e8b7a7d287c8.1470015604.git.segher@kernel.crashing.org> Cc: bschmidt@redhat.com From: Jeff Law Message-ID: Date: Thu, 08 Sep 2016 17:54:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <3d1c2c877df1da0be9eca7cb1016e8b7a7d287c8.1470015604.git.segher@kernel.crashing.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2016-09/txt/msg00460.txt.bz2 On 07/31/2016 07:42 PM, Segher Boessenkool wrote: > A restore is supposed to restore some certain register. Restoring it > into some other register will not work. Don't. > > 2016-06-07 Segher Boessenkool > > * regrename.c (build_def_use): Invalidate chains that have a > REG_CFA_RESTORE on some instruction. Again, how is this different from a normal epilogue that restores registers which regrename seems to not muck with. Jeff