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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/49820] Explicit check for integer negative after abs optimized away
Date: Sat, 23 Jul 2011 17:23:00 -0000 [thread overview]
Message-ID: <bug-49820-4-sOY6xhRXTA@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-49820-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49820
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-07-23 17:23:44 UTC ---
(In reply to comment #1)
> Integer overflow is undefined. You have to check before the fact, or compile
> with -fwrapv.
That should say signed integer overflow is undefined.
next prev parent reply other threads:[~2011-07-23 17:23 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-23 7:11 [Bug c/49820] New: " agner at agner dot org
2011-07-23 7:20 ` [Bug c/49820] " schwab@linux-m68k.org
2011-07-23 17:23 ` pinskia at gcc dot gnu.org [this message]
2011-07-23 17:30 ` schwab@linux-m68k.org
2011-07-23 20:48 ` noloader at gmail dot com
2011-07-23 20:59 ` ebotcazou at gcc dot gnu.org
2011-07-23 22:28 ` noloader at gmail dot com
2011-07-24 8:10 ` ebotcazou at gcc dot gnu.org
2011-07-24 8:17 ` agner at agner dot org
2011-07-24 9:41 ` pinskia at gcc dot gnu.org
2011-07-25 7:44 ` agner at agner dot org
2011-07-25 7:46 ` ebotcazou at gcc dot gnu.org
2011-07-25 14:22 ` agner at agner dot org
2011-07-26 19:32 ` agner at agner dot org
2011-07-27 11:23 ` ebotcazou at gcc dot gnu.org
2011-07-27 14:28 ` agner at agner dot org
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