From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 22567 invoked by alias); 20 Jun 2005 22:20:16 -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 22442 invoked by uid 22791); 20 Jun 2005 22:19:53 -0000 Received: from mail-out4.apple.com (HELO mail-out4.apple.com) (17.254.13.23) by sourceware.org (qpsmtpd/0.30-dev) with ESMTP; Mon, 20 Jun 2005 22:19:53 +0000 Received: from mailgate1.apple.com (a17-128-100-225.apple.com [17.128.100.225]) by mail-out4.apple.com (8.12.11/8.12.11) with ESMTP id j5KMJpWD008090 for ; Mon, 20 Jun 2005 15:19:51 -0700 (PDT) Received: from relay4.apple.com (relay4.apple.com) by mailgate1.apple.com (Content Technologies SMTPRS 4.3.17) with ESMTP id ; Mon, 20 Jun 2005 15:19:51 -0700 Received: from [17.201.24.155] (mrs.apple.com [17.201.24.155]) by relay4.apple.com (8.12.11/8.12.11) with ESMTP id j5KMJmTj017529; Mon, 20 Jun 2005 15:19:49 -0700 (PDT) In-Reply-To: References: Mime-Version: 1.0 (Apple Message framework v730) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <66999F79-412F-4137-90A5-4360660D8665@apple.com> Cc: "Joseph S. Myers" , Dale Johannesen , Robert Dewar , Andrew Pinski , GCC Development Content-Transfer-Encoding: 7bit From: Mike Stump Subject: Re: basic VRP min/max range overflow question Date: Mon, 20 Jun 2005 22:20:00 -0000 To: Paul Schlie X-SW-Source: 2005-06/txt/msg00928.txt.bz2 On Jun 18, 2005, at 11:50 AM, Paul Schlie wrote: > [ curiously can't find any actual reference stating that integer > overflow > is specifically results in undefined behavior, although it's > obviously ill defined? Every operation that isn't defined is undefined. Only the operations that are defined, are defined. Think about the implications of this.