From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 16748 invoked by alias); 6 Jun 2013 12:44:33 -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 16662 invoked by uid 89); 6 Jun 2013 12:44:32 -0000 X-Spam-SWARE-Status: No, score=-3.5 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,KHOP_THREADED,RCVD_IN_DNSWL_LOW,RCVD_IN_HOSTKARMA_YE,SPF_PASS autolearn=ham version=3.3.1 Received: from mail-ob0-f170.google.com (HELO mail-ob0-f170.google.com) (209.85.214.170) by sourceware.org (qpsmtpd/0.84/v0.84-167-ge50287c) with ESMTP; Thu, 06 Jun 2013 12:44:31 +0000 Received: by mail-ob0-f170.google.com with SMTP id ef5so4608433obb.1 for ; Thu, 06 Jun 2013 05:44:30 -0700 (PDT) X-Received: by 10.60.23.37 with SMTP id j5mr3551981oef.134.1370522669969; Thu, 06 Jun 2013 05:44:29 -0700 (PDT) MIME-Version: 1.0 Received: by 10.182.125.225 with HTTP; Thu, 6 Jun 2013 05:43:49 -0700 (PDT) In-Reply-To: References: From: Steven Bosscher Date: Thu, 06 Jun 2013 12:44:00 -0000 Message-ID: Subject: Re: [PATCH] Enhance shrink-wrap To: Zhenqiang Chen Cc: gcc-patches@gcc.gnu.org, Martin Jambor Content-Type: text/plain; charset=ISO-8859-1 X-SW-Source: 2013-06/txt/msg00309.txt.bz2 On Thu, Jun 6, 2013 at 11:55 AM, Zhenqiang Chen wrote: > The patch enhance prepare_shrink_wrap by doing copyprop for the entry > block. This exposes more opportunities for shrink-wrapping. These > kinds of copies often occur when incoming argument registers are moved > to call-saved registers because their values are live across one or > more calls during the function. Hello, This was discussed before, see the thread surrounding: http://gcc.gnu.org/ml/gcc-patches/2013-04/msg01455.html This is also http://gcc.gnu.org/PR10474 Ciao! Steven