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From: "fweimer at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/54365] ARM optimization bug when pointer arithmetic wraps
Date: Thu, 30 Aug 2012 13:33:00 -0000 [thread overview]
Message-ID: <bug-54365-4-Se7lohKtnL@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-54365-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54365
--- Comment #6 from Florian Weimer <fweimer at redhat dot com> 2012-08-30 13:33:05 UTC ---
(In reply to comment #5)
> -fwrapv doesn't appear to make a difference:
>
> $ gcc compilerbug.c
> $ ./a.out
> it wraps
> $ gcc -O2 compilerbug.c
> $ ./a.out
> no wrap
> $ gcc -O2 -fwrapv compilerbug.c
> $ ./a.out
> no wrap
> $
This is surprising. Is there a way to extend the effect of -fwrapv to pointer
arithmetic?
next prev parent reply other threads:[~2012-08-30 13:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-24 11:57 [Bug rtl-optimization/54365] New: " glaw@undo-software.com
2012-08-24 18:24 ` [Bug rtl-optimization/54365] " pinskia at gcc dot gnu.org
2012-08-24 18:38 ` glaw@undo-software.com
2012-08-24 18:43 ` jakub at gcc dot gnu.org
2012-08-27 7:39 ` fweimer at redhat dot com
2012-08-30 13:24 ` glaw@undo-software.com
2012-08-30 13:33 ` fweimer at redhat dot com [this message]
2012-08-30 13:45 ` jakub at gcc dot gnu.org
2012-08-30 13:56 ` fweimer at redhat dot com
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