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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/48172] [4.5/4.6/4.7 Regression] incorrect vectorization of loop in GCC 4.5.* with -O3
Date: Thu, 12 May 2011 14:05:00 -0000	[thread overview]
Message-ID: <bug-48172-4-cFf2VvKwd7@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-48172-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48172

--- Comment #11 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-05-12 12:38:15 UTC ---
(In reply to comment #9)
> (In reply to comment #8)
> > Created attachment 24236 [details]
> > patch
> > 
> > Patch I'm going to test.
> 
> So, segment_length = scalar_step * vf * scalar_niters?
> I think we don't need vf here.

Hm, right.  I'll prepare a followup.

> Also, why not do that only for different steps?

We don't know this at this point.  Maybe we can change the structure
of the code somewhat.  I'll have a look.

> Thanks,
> Ira


  parent reply	other threads:[~2011-05-12 13:55 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-17 20:15 [Bug tree-optimization/48172] New: " geir at cray dot com
2011-03-18  9:32 ` [Bug tree-optimization/48172] [4.5/4.6/4.7 Regression] " rguenth at gcc dot gnu.org
2011-03-18  9:51 ` rguenth at gcc dot gnu.org
2011-03-18 10:05 ` rguenth at gcc dot gnu.org
2011-03-18 12:28 ` rguenth at gcc dot gnu.org
2011-03-19 17:35 ` irar at il dot ibm.com
2011-04-08  0:16 ` xunxun1982 at gmail dot com
2011-04-10 10:43 ` rguenth at gcc dot gnu.org
2011-04-28 15:22 ` rguenth at gcc dot gnu.org
2011-05-12 11:37 ` rguenth at gcc dot gnu.org
2011-05-12 12:46 ` irar at il dot ibm.com
2011-05-12 13:44 ` rguenth at gcc dot gnu.org
2011-05-12 13:55 ` rguenth at gcc dot gnu.org
2011-05-12 14:05 ` rguenth at gcc dot gnu.org [this message]
2011-05-12 14:06 ` irar at il dot ibm.com
2011-05-13  8:52 ` rguenth at gcc dot gnu.org
2011-05-13  9:19 ` [Bug tree-optimization/48172] [4.5/4.6 " rguenth at gcc dot gnu.org
2011-05-18 13:57 ` rguenth at gcc dot gnu.org
2011-07-19  0:57 ` [Bug tree-optimization/48172] [4.5 " cnstar9988 at gmail dot com
2012-01-03 13:08 ` rguenth at gcc dot gnu.org
2012-01-03 13:09 ` rguenth at gcc dot gnu.org

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