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From: Vincent Lefevre <vincent+gcc@vinc17.org>
To: gcc-help@gcc.gnu.org
Subject: Re: Is it OK that gcc optimizes away overflow check?
Date: Sat, 30 Jul 2011 23:30:00 -0000	[thread overview]
Message-ID: <20110730233035.GF20905@prunille.vinc17.org> (raw)
In-Reply-To: <4E2D9816.4060307@redhat.com>

On 2011-07-25 17:21:42 +0100, Andrew Haley wrote:
> gcc is already safe, though: we don't do any optimizations that
> generate incorrect code.

Not always (but bugs have been reported about incorrect optimizations).

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <http://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Arénaire project (LIP, ENS-Lyon)

  reply	other threads:[~2011-07-30 23:30 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-23 20:14 Agner Fog
2011-07-23 21:06 ` Jeffrey Walton
2011-07-25  6:07   ` Ian Lance Taylor
2011-07-25  6:04 ` Ian Lance Taylor
2011-07-25  8:32   ` Agner Fog
2011-07-25 17:18     ` me22
2011-07-25 17:50     ` Ian Lance Taylor
2011-07-26  9:39   ` Agner Fog
2011-07-26 10:35     ` Andrew Haley
2011-07-26 17:31       ` Andrew Haley
2011-07-27 15:03         ` Agner Fog
2011-07-26 14:55     ` Jeffrey Walton
     [not found]   ` <4E2E6CC6.3040106@agner.org>
2011-07-26 14:44     ` Ian Lance Taylor
2011-07-26 16:24       ` Agner Fog
2011-07-26 18:17         ` Ian Lance Taylor
2011-07-25  9:43 ` Andrew Haley
2011-07-25 15:38   ` Agner Fog
2011-07-25 16:22     ` Andrew Haley
2011-07-30 23:30       ` Vincent Lefevre [this message]
2011-08-01  8:59         ` Andrew Haley

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