From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15635 invoked by alias); 19 Jan 2004 22:41:50 -0000 Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-owner@gcc.gnu.org Received: (qmail 15626 invoked from network); 19 Jan 2004 22:41:49 -0000 Received: from unknown (HELO physunc.phy.uc.edu) (129.137.4.6) by sources.redhat.com with SMTP; 19 Jan 2004 22:41:49 -0000 Received: from bethe.phy.uc.edu (bethe.geop.uc.edu [10.44.6.245]) by physunc.phy.uc.edu (8.9.3p2/8.9.3) with ESMTP id RAA21474; Mon, 19 Jan 2004 17:40:42 -0500 (EST) Received: from [127.0.0.1] (IDENT:root@earth.phy.uc.edu [10.44.6.234]) by bethe.phy.uc.edu (8.9.3p2/8.9.3) with ESMTP id RAA11519; Mon, 19 Jan 2004 17:40:42 -0500 (EST) In-Reply-To: <10401191507.AA28782@vlsi1.ultra.nyu.edu> References: <10401191507.AA28782@vlsi1.ultra.nyu.edu> Mime-Version: 1.0 (Apple Message framework v609) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <82506AB1-4AD0-11D8-A276-000393A6D2F2@physics.uc.edu> Content-Transfer-Encoding: 7bit Cc: dnovillo@redhat.com, gcc@gcc.gnu.org, Andrew Pinski From: Andrew Pinski Subject: Re: [RFC] Contributing tree-ssa to mainline Date: Mon, 19 Jan 2004 22:41:00 -0000 To: kenner@vlsi1.ultra.nyu.edu (Richard Kenner) X-SW-Source: 2004-01/txt/msg01400.txt.bz2 On Jan 19, 2004, at 07:07, Richard Kenner wrote: > Good, because that's my concern: the form of the subscript information > is > critical to many high-level loop optimizations. If you're going to > have to > figure that out from an address computation, you're giving up much of > the > benefit of doing that optimization on trees instead of RTL> But any alias/loop optimization cannot really be done on targets like IA64 with almost no offset. The IA64 has only room for a zero offset, every thing is done in index form. Thanks, Andrew Pinski