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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/54717] [4.8 Regression] Runtime regression: polyhedron test "rnflow" degraded
Date: Thu, 27 Sep 2012 09:28:00 -0000	[thread overview]
Message-ID: <bug-54717-4-8wXuJZHp3O@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-54717-4@http.gcc.gnu.org/bugzilla/>


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54717

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-09-27 09:28:04 UTC ---
(In reply to comment #4)
> The slowdown is mostly hidden by  -fno-tree-loop-if-convert.

I would say this means we have more vectorization opportunities after the
patch.  Opportunities that might end up being not profitable.

Sergey, are those differences you quote the only differences?


  parent reply	other threads:[~2012-09-27  9:28 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-26 12:54 [Bug tree-optimization/54717] New: " sergos.gnu at gmail dot com
2012-09-26 13:17 ` [Bug tree-optimization/54717] " ubizjak at gmail dot com
2012-09-26 14:17 ` [Bug tree-optimization/54717] [4.8 Regression] " rguenth at gcc dot gnu.org
2012-09-26 15:12 ` sergos.gnu at gmail dot com
2012-09-26 15:41 ` dominiq at lps dot ens.fr
2012-09-26 20:07 ` sergos.gnu at gmail dot com
2012-09-27  9:28 ` rguenth at gcc dot gnu.org [this message]
2012-09-27 10:43 ` rguenth at gcc dot gnu.org
2012-10-02 20:24 ` dominiq at lps dot ens.fr
2012-10-08  8:55 ` sergos.gnu at gmail dot com
2012-11-13 18:40 ` ubizjak at gmail dot com
2012-11-13 18:54 ` dominiq at lps dot ens.fr
2012-11-14 18:56 ` sergos.gnu at gmail dot com
2012-11-14 19:42   ` Jan Hubicka
2012-11-14 19:43 ` hubicka at ucw dot cz
2012-11-14 20:11 ` hubicka at gcc dot gnu.org
2012-11-15 10:28 ` hubicka at gcc dot gnu.org
2012-11-15 10:52 ` hubicka at gcc dot gnu.org
2012-11-15 15:07 ` dominiq at lps dot ens.fr
2012-11-16 10:37 ` hubicka at gcc dot gnu.org
2012-12-06 16:51 ` rguenth at gcc dot gnu.org

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