From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 102084 invoked by alias); 12 Jul 2016 12:48:06 -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 102075 invoked by uid 89); 12 Jul 2016 12:48:06 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.2 required=5.0 tests=BAYES_00,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 (AES256-GCM-SHA384 encrypted) ESMTPS; Tue, 12 Jul 2016 12:48:05 +0000 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) (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 0965F85541; Tue, 12 Jul 2016 12:48:04 +0000 (UTC) Received: from localhost.localdomain (vpn1-6-218.ams2.redhat.com [10.36.6.218]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u6CCm2lw018147; Tue, 12 Jul 2016 08:48:02 -0400 Subject: Re: [PATCH], PowerPC support to enable -mlra and/or -mfloat128 To: Segher Boessenkool References: <20160711200701.GA21095@ibm-tiger.the-meissners.org> <20160712121559.GC13551@gate.crashing.org> <7f93c3f9-6e15-257e-f573-43f2c14127fe@redhat.com> <20160712124544.GD13551@gate.crashing.org> Cc: Richard Biener , Michael Meissner , GCC Patches , David Edelsohn , Bill Schmidt From: Bernd Schmidt Message-ID: <9614013f-5daf-a271-f476-b4bd1adab9fd@redhat.com> Date: Tue, 12 Jul 2016 12:48:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0 MIME-Version: 1.0 In-Reply-To: <20160712124544.GD13551@gate.crashing.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2016-07/txt/msg00633.txt.bz2 On 07/12/2016 02:45 PM, Segher Boessenkool wrote: > On Tue, Jul 12, 2016 at 02:40:28PM +0200, Bernd Schmidt wrote: >> On 07/12/2016 02:15 PM, Segher Boessenkool wrote: >>> How can LRA ever be made default for all targets without breaking those >>> that do not want to change? >> >> LRA advocates would have to fix the issues with it that prevent it from >> being usable on certain targets. Based on my initial experiments with >> Blackfin, and LRA review comments I had based on c6x requirements, I >> suspect register elimination will have to be rewritten to start with. > > Do you have PR #s for those issues? No. You can reproduce issues with Blackfin easily by enabling LRA for it, and I described the C6X issues when the LRA patches were posted for review. Bernd