From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 30021 invoked by alias); 9 Sep 2016 21:15:52 -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 30010 invoked by uid 89); 9 Sep 2016 21:15:51 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.1 required=5.0 tests=AWL,BAYES_00,RP_MATCHES_RCVD autolearn=ham version=3.3.2 spammy= X-HELO: gate.crashing.org Received: from gate.crashing.org (HELO gate.crashing.org) (63.228.1.57) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Fri, 09 Sep 2016 21:15:41 +0000 Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.13.8) with ESMTP id u89LFbED027462; Fri, 9 Sep 2016 16:15:38 -0500 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id u89LFaPc027461; Fri, 9 Sep 2016 16:15:36 -0500 Date: Fri, 09 Sep 2016 21:21:00 -0000 From: Segher Boessenkool To: Jeff Law Cc: gcc-patches@gcc.gnu.org, bschmidt@redhat.com Subject: Re: [PATCH 7/9] cprop: Leave RTX_FRAME_RELATED_P instructions alone Message-ID: <20160909211536.GB26965@gate.crashing.org> References: <9adf81ea9825b4c605cf02022817970a3b0d2cb8.1470015604.git.segher@kernel.crashing.org> <8e9f3ff5-6ef1-ca66-3d5b-18c7e1f09487@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8e9f3ff5-6ef1-ca66-3d5b-18c7e1f09487@redhat.com> User-Agent: Mutt/1.4.2.3i X-IsSubscribed: yes X-SW-Source: 2016-09/txt/msg00548.txt.bz2 On Thu, Sep 08, 2016 at 11:55:04AM -0600, Jeff Law wrote: > On 07/31/2016 07:42 PM, Segher Boessenkool wrote: > >Doing cprop on frame-related instructions blows up spectacularly. > >So don't. > > > >2016-06-07 Segher Boessenkool > > > > * regcprop.c (copyprop_hardreg_forward_1): Don't change > > RTX_FRAME_RELATED_P instructions. > Example or testcase? A bunch of testsuite things, maybe many even, I don't remember, it's been a while. Easy to find out though :-) (It'll take at least a day). Segher