From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 32462 invoked by alias); 17 Jan 2004 03:09:59 -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 32455 invoked from network); 17 Jan 2004 03:09:59 -0000 Received: from unknown (HELO mailhost2.tudelft.nl) (130.161.180.2) by sources.redhat.com with SMTP; 17 Jan 2004 03:09:59 -0000 Received: from 127.0.0.1 (localhost [127.0.0.1]) by rav.antivirus (Postfix) with SMTP id 0A00B18271; Sat, 17 Jan 2004 04:09:59 +0100 (MET) Received: from listserv.tudelft.nl (listserv.tudelft.nl [130.161.180.33]) by mailhost2.tudelft.nl (Postfix) with ESMTP id F22B818267; Sat, 17 Jan 2004 04:09:58 +0100 (MET) Received: from steven.lr-s.tudelft.nl (hekje1.shuis.tudelft.nl [145.94.192.78]) by listserv.tudelft.nl (8.12.10/8.12.8) with ESMTP id i0H39wQP017880; Sat, 17 Jan 2004 04:09:58 +0100 (MET) Received: by steven.lr-s.tudelft.nl (Postfix, from userid 500) id 1D0FE98413; Sat, 17 Jan 2004 04:07:26 +0100 (CET) From: Steven Bosscher To: kenner@vlsi1.ultra.nyu.edu (Richard Kenner), dnovillo@redhat.com Subject: Re: [RFC] Contributing tree-ssa to mainline Date: Sat, 17 Jan 2004 03:09:00 -0000 User-Agent: KMail/1.5.4 Cc: gcc@gcc.gnu.org References: <10401170230.AA15232@vlsi1.ultra.nyu.edu> In-Reply-To: <10401170230.AA15232@vlsi1.ultra.nyu.edu> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200401170407.26547.s.bosscher@student.tudelft.nl> X-SW-Source: 2004-01/txt/msg01008.txt.bz2 On Saturday 17 January 2004 03:30, Richard Kenner wrote: > My feeling is that "success" would be in showing at least one class of code > where we see very significantly better code (at least a factor of two) and > we see significant (around 10-20%) performance improvement in a larger > class of test cases. You must be joking. I've added this beautiful quip to bugzilla: Moore's Law: "Advances in hardware double computing power every 18 months". Proebsting's law: "Advances in compiler optimizations double computing power every 18 years". Expecting tree-ssa to produce code better by a factor of two is simply unreasonable. Gr. Steven