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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/55334] [4.8/4.9 Regression] mgrid regression (ipa-cp disables vectorization)
Date: Wed, 24 Jul 2013 15:47:00 -0000	[thread overview]
Message-ID: <bug-55334-4-qVtjargaSz@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-55334-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55334

--- Comment #33 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I can confirm that one call of resid now gets inlined on the branch
even on x86_64 (I'm confused why, the dump seems to suggest all call
sites would violate param max-inline-insns-auto limit but then one
gets inlined anyway) and we are 5.6% slower than if we also specify
--param inline-min-speedup=17 (in addition to -Ofast).

This is not a regression from 4.8.0.  When I checked out the revision
with that tag, I got exactly the same inlining and pretty much the
same run time.

As far as the cause of the slowdown is concerned, my simple greps
suggest that vectorization happens anyway but as I wrote in comment
24, if we loose restrict we also lose opportunity to do hoisting of a
loop invariant load so it is still likely that a lost restrict is the
issue anyway.


  parent reply	other threads:[~2013-07-24 15:47 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-11-15  2:27 [Bug tree-optimization/55334] New: " hubicka at gcc dot gnu.org
2012-11-15  7:11 ` [Bug tree-optimization/55334] " vincenzo.innocente at cern dot ch
2012-11-15 11:07 ` hubicka at gcc dot gnu.org
2012-11-15 11:42 ` hubicka at gcc dot gnu.org
2012-11-16 10:39 ` hubicka at gcc dot gnu.org
2012-11-16 10:56 ` vincenzo.innocente at cern dot ch
2012-11-16 12:06 ` jakub at gcc dot gnu.org
2012-11-16 13:20 ` hubicka at gcc dot gnu.org
2012-11-16 13:22 ` hubicka at gcc dot gnu.org
2012-11-16 13:29 ` jakub at gcc dot gnu.org
2012-11-16 13:46 ` vincenzo.innocente at cern dot ch
2012-11-16 13:56 ` jakub at gcc dot gnu.org
2012-11-16 13:59 ` vincenzo.innocente at cern dot ch
2012-11-16 14:17 ` jakub at gcc dot gnu.org
2012-11-16 14:45 ` [Bug tree-optimization/55334] [4.8 Regression] " jakub at gcc dot gnu.org
2012-12-07 10:12 ` rguenth at gcc dot gnu.org
2012-12-10 15:34 ` rguenth at gcc dot gnu.org
2012-12-21 12:26 ` rguenth at gcc dot gnu.org
2012-12-21 13:49 ` hubicka at ucw dot cz
2012-12-21 14:02 ` rguenth at gcc dot gnu.org
2012-12-21 14:09 ` rguenth at gcc dot gnu.org
2012-12-21 14:10 ` jakub at gcc dot gnu.org
2012-12-21 14:12 ` rguenth at gcc dot gnu.org
2012-12-21 14:22 ` hubicka at ucw dot cz
2012-12-21 14:27 ` rguenth at gcc dot gnu.org
2013-02-12 20:11 ` jamborm at gcc dot gnu.org
2013-02-13  9:09 ` rguenth at gcc dot gnu.org
2013-02-19 12:55 ` jamborm at gcc dot gnu.org
2013-02-19 13:50 ` rguenther at suse dot de
2013-02-20 11:13 ` jamborm at gcc dot gnu.org
2013-02-20 12:57 ` jamborm at gcc dot gnu.org
2013-02-20 14:08 ` [Bug tree-optimization/55334] [4.8/4.9 " rguenth at gcc dot gnu.org
2013-03-28 12:36 ` jamborm at gcc dot gnu.org
2013-07-10 23:54 ` chris_s_jones at yahoo dot com
2013-07-24 15:47 ` jamborm at gcc dot gnu.org [this message]
2013-07-25 16:33 ` hubicka at ucw dot cz
2014-04-22 11:38 ` [Bug tree-optimization/55334] [4.8/4.9/4.10 " jakub at gcc dot gnu.org
2014-07-16 13:30 ` jakub at gcc dot gnu.org
2014-09-02 15:45 ` [Bug tree-optimization/55334] [4.8/4.9/5 " vp at gcc dot gnu.org
2014-09-03 10:04 ` jamborm at gcc dot gnu.org
2014-09-03 10:25 ` rguenther at suse dot de
2014-09-03 14:11 ` rguenth at gcc dot gnu.org
2014-09-05 12:41 ` rguenth at gcc dot gnu.org
2014-10-30 10:43 ` jakub at gcc dot gnu.org
2014-11-24  9:25 ` rguenth at gcc dot gnu.org
2014-11-24  9:25 ` [Bug tree-optimization/55334] [4.8/4.9 " rguenth at gcc dot gnu.org
2014-11-24  9:25 ` [Bug tree-optimization/55334] [4.8/4.9/5 " rguenth at gcc dot gnu.org
2015-02-16 11:26 ` [Bug tree-optimization/55334] [4.8/4.9 " andrew.n.senkevich at gmail dot com
2015-02-16 11:29 ` jakub at gcc dot gnu.org
2015-02-16 12:17 ` rguenther at suse dot de
2015-06-26 20:01 ` [Bug tree-optimization/55334] [4.9 " jakub at gcc dot gnu.org
2015-06-26 20:31 ` jakub at gcc dot gnu.org

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