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To: "Philippe Charnier" <charnier@xp11.frmug.org>
cc: current@FreeBSD.org
Subject: Re: gcc's bug. please comment 
In-reply-to: Your message of "Fri, 11 Oct 1996 21:05:36 +0200."
             <199610111905.VAA01615@xp11.frmug.org> 
Date: Sat, 12 Oct 1996 10:21:36 +0200
Message-ID: <3203.845108496@critter.tfs.com>
From: Poul-Henning Kamp <phk@critter.tfs.com>
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In message <199610111905.VAA01615@xp11.frmug.org>, "Philippe Charnier" writes:
>Hello,
>
>A friend found a bug in gcc-2.7.2.1. The following program fails on
>i386 architecture (both FreeBSD and solaris-x86) and works as expected
>on sparc (both sunos and solaris2.5.1) and on hp (hp-ux9.07). As I'm
>not on the gcc-bug list, please comment before I report the bug. This
>afternoon I sent a bug report to Sun but it was before trying on
>FreeBSD.
>
>The output should be `1 2' but it is `2 1' on i386 computers.
>Here is the code:
>
>----------mypb2.c-----------------
>#include <stdio.h>
>#include <stdlib.h>
>
>main()
>{ FILE *fic;
>  int a[2][50], i = 0;
>
>  fic=fopen("mypb2.csv","r");
>  fscanf(fic, "%d;%d", &a[1][i++], &a[1][i++]);

The order in which the i++'s get evaluated is not defined by the
apocryphical writings, thus the behavior of this line is likely
to depend on the parameter passing convention of the CPU.

--
Poul-Henning Kamp           | phk@FreeBSD.ORG       FreeBSD Core-team.
http://www.freebsd.org/~phk | phk@login.dknet.dk    Private mailbox.
whois: [PHK]                | phk@ref.tfs.com       TRW Financial Systems, Inc.
Future will arrive by its own means, progress not so.