From owner-freebsd-hackers@FreeBSD.ORG  Sun Mar 21 06:13:28 2004
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 2A4F016A4CE
	for <hackers@freebsd.org>; Sun, 21 Mar 2004 06:13:28 -0800 (PST)
Received: from mailhost.stack.nl (vaak.stack.nl [131.155.140.140])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 6212243D3F
	for <hackers@freebsd.org>; Sun, 21 Mar 2004 06:13:27 -0800 (PST)
	(envelope-from marcolz@stack.nl)
Received: from hammer.stack.nl (hammer.stack.nl [2001:610:1108:5010::153])
	by mailhost.stack.nl (Postfix) with ESMTP
	id 405DA306#0FD151F001; Sun, 21 Mar 2004 15:13:26 +0100 (CET)
Received: by hammer.stack.nl (Postfix, from userid 333)
	id 81EE8649E; Sun, 21 Mar 2004 15:13:30 +0100 (CET)
Date: Sun, 21 Mar 2004 15:13:30 +0100
From: Marc Olzheim <marcolz@stack.nl>
To: Peter Jeremy <peterjeremy@optushome.com.au>
Message-ID: <20040321141330.GA78596@stack.nl>
References: <p0602044cbc827481888c@[128.113.24.47]>
	<002f01c40f14$f4406540$1200a8c0@gsicomp.on.ca>
	<20040321084543.GA48068@server.vk2pj.dyndns.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20040321084543.GA48068@server.vk2pj.dyndns.org>
X-Operating-System: FreeBSD hammer.stack.nl 5.2-CURRENT FreeBSD 5.2-CURRENT
X-URL: http://www.stack.nl/~marcolz/
User-Agent: Mutt/1.5.6i
cc: hackers@freebsd.org
cc: Garance A Drosihn <drosih@rpi.edu>
Subject: Re: Adventures with gcc: code vs object-code size
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 21 Mar 2004 14:13:28 -0000

On Sun, Mar 21, 2004 at 07:45:43PM +1100, Peter Jeremy wrote:
> But (IMHO) this is a lot less clear than the former code (thought I admit
> I'm guilty of doing this quite a lot in my code).  Note that a modern C
> compiler is free to convert
>   strcpy(elemcopy, ":") == 0
> into
>   elemcopy[0] == ':' && elemcopy[1] == '\0'
> assuming the relevant header (<string.h>) is in scope.  (I was under the
> impression that gcc did this).

You're mixing up strcpy() with strcmp(), but you are right, unless
-fno-builtin is specified.

Marc