From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29073 invoked by alias); 7 Apr 2003 21:26:01 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 29058 invoked by uid 71); 7 Apr 2003 21:26:00 -0000 Date: Mon, 07 Apr 2003 21:26:00 -0000 Message-ID: <20030407212600.29057.qmail@sources.redhat.com> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, From: Andreas Schwab Subject: Re: c/10339: strncmp generates imPure code Reply-To: Andreas Schwab X-SW-Source: 2003-04/txt/msg00314.txt.bz2 List-Id: The following reply was made to PR optimization/10339; it has been noted by GNATS. From: Andreas Schwab To: Michael Ubell Cc: Timothy C Prince , falk.hueffner@student.uni-tuebingen.de, bangerth@ices.utexas.edu, gcc-bugs@gcc.gnu.org, gcc-gnats@gcc.gnu.org Subject: Re: c/10339: strncmp generates imPure code Date: Mon, 07 Apr 2003 23:23:16 +0200 Michael Ubell writes: |> Attached is a program that reads 831 unaligned unallocated |> bytes. I can't actually get it to segv on Solaris because |> I don't know enough about their memory management, but |> I cannot believe this is correct code. Yes, you are right, I can reproduce that also on ia64-linux. The conversion to memcmp is really invalid here. Andreas. -- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."