This is the mail archive of the gcc-bugs@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: Bug in gcc

From: "Swaminathan Venkatakrishnaprasad" <vswami at agere dot com>
To: "Marcus Meissner" <meissner at suse dot de>
Cc: <bug-gcc at prep dot ai dot mit dot edu>
Date: Thu, 13 Feb 2003 11:31:08 -0500
Subject: Re: Bug in gcc
References: <00ae01c2d37b$498ed210$ddb65e80@agere.com> <20030213162334.GA25189@suse.de>

Hello Marcus,

Thanks much for your reply, I appreciate it.

Both Microsoft C++ compiler and
Sun Workshop C compiler evaluates
the expression and increments B and C
twice.

Regards,
Swami

----- Original Message -----
From: "Marcus Meissner" <meissner@suse.de>
To: "Swaminathan Venkatakrishnaprasad" <vswami@agere.com>
Cc: <bug-gcc@prep.ai.mit.edu>
Sent: Thursday, February 13, 2003 11:23 AM
Subject: Re: Bug in gcc


> On Thu, Feb 13, 2003 at 11:16:38AM -0500, Swaminathan Venkatakrishnaprasad
wrote:
> > Hello,
> >
> > The program below when excuted yields incorrect result:
> >
> > main()
> > {
> >    int A,B,C;
> >
> >    A=0; B=1;C=2;
> >
> >    A = B++ + B++ + C++ + C++;
>
> You are modifying C twice, this is undefined behaviour.
>
> Ciao, Marcus

References:
- Bug in gcc
  - From: Swaminathan Venkatakrishnaprasad
- Re: Bug in gcc
  - From: Marcus Meissner

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]