From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-117751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 16736 invoked by alias); 9 Nov 2004 19:27:30 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 16562 invoked from network); 9 Nov 2004 19:27:23 -0000
Received: from unknown (HELO mprelay.uc.edu) (129.137.3.48)
  by sourceware.org with SMTP; 9 Nov 2004 19:27:23 -0000
Received: from [10.44.106.140] (zhivago.geop.uc.edu [10.44.106.140])
	by mprelay.uc.edu (MOS 3.4.7-GR)
	with ESMTP id BYJ68804;
	Tue, 9 Nov 2004 14:27:22 -0500 (EST)
In-Reply-To: <200411092023.46209.torger@ludd.luth.se>
References: <200411092023.46209.torger@ludd.luth.se>
Mime-Version: 1.0 (Apple Message framework v619)
Content-Type: text/plain; charset=US-ASCII; format=flowed
Message-Id: <6026605A-3285-11D9-9E21-000A95D692F4@physics.uc.edu>
Content-Transfer-Encoding: 7bit
Cc: gcc-bugs@gcc.gnu.org, Andreas Schwab <schwab@suse.de>
From: Andrew Pinski <pinskia@physics.uc.edu>
Subject: Re: No warning when breaking strict-aliasing rules despite -Wstrict-aliasing
Date: Tue, 09 Nov 2004 19:27:00 -0000
To: Anders Torger <torger@ludd.luth.se>
X-SW-Source: 2004-11/txt/msg01160.txt.bz2
List-Id: <gcc-bugs.sourceware.org>


On Nov 9, 2004, at 2:23 PM, Anders Torger wrote:

>   gcc 2.95 generates correct code.

It just generates code which you expected not the code which
the C standard says it is undefined (oh by the way we could wipe
your HD if you invoke undefined behavior).

Also a DR report says we cannot error out on undefined code
because it might not execute at all.

Thanks,
Andrew Pinski