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[Bug c/49820] Explicit check for integer negative after abs optimized away
- From: "pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 23 Jul 2011 17:23:46 +0000
- Subject: [Bug c/49820] Explicit check for integer negative after abs optimized away
- Auto-submitted: auto-generated
- References: <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.