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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/55177] missed optimizations with __builtin_bswap
Date: Fri, 02 Nov 2012 10:56:00 -0000 [thread overview]
Message-ID: <bug-55177-4-vezOhv8bnA@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-55177-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55177
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-11-02
CC| |ebotcazou at gcc dot
| |gnu.org
Component|tree-optimization |rtl-optimization
Summary|Missed optimisation: bswap, |missed optimizations with
|mask with constant, bswap |__builtin_bswap
|back again. |
Ever Confirmed|0 |1
Severity|normal |enhancement
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-11-02 10:56:17 UTC ---
If you don't need to swap, then do not use __builtin_bswap! The first example
is really dumb. That being said, the second example has some merit and we
should do something to optimize it at the RTL level.
next prev parent reply other threads:[~2012-11-02 10:56 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-02 9:59 [Bug tree-optimization/55177] New: Missed optimisation: bswap, mask with constant, bswap back again dwmw2 at infradead dot org
2012-11-02 10:46 ` [Bug tree-optimization/55177] " dwmw2 at infradead dot org
2012-11-02 10:56 ` ebotcazou at gcc dot gnu.org [this message]
2012-11-02 17:05 ` [Bug rtl-optimization/55177] missed optimizations with __builtin_bswap dwmw2 at infradead dot org
2012-11-02 17:46 ` ebotcazou at gcc dot gnu.org
2012-11-02 19:42 ` dwmw2 at infradead dot org
2012-11-02 21:59 ` ebotcazou at gcc dot gnu.org
2012-11-08 14:30 ` dwmw2 at infradead dot org
2012-11-08 16:14 ` ebotcazou at gcc dot gnu.org
2013-03-08 12:12 ` dwmw2 at infradead dot org
2013-03-08 15:19 ` pinskia at gcc dot gnu.org
2013-03-09 0:06 ` ebotcazou at gcc dot gnu.org
2013-03-09 0:16 ` [Bug tree-optimization/55177] " pinskia at gcc dot gnu.org
2014-04-04 12:40 ` krebbel at gcc dot gnu.org
2014-11-22 22:11 ` pinskia at gcc dot gnu.org
2015-01-23 14:00 ` ubizjak at gmail dot com
2015-01-23 14:08 ` dwmw2 at infradead dot org
2015-01-23 14:11 ` ubizjak at gmail dot com
2021-11-15 8:30 ` pinskia at gcc dot gnu.org
2021-11-15 8:35 ` pinskia at gcc dot gnu.org
2021-11-15 9:19 ` pinskia at gcc dot gnu.org
2021-11-17 23:40 ` cvs-commit at gcc dot gnu.org
2021-11-17 23:40 ` pinskia at gcc dot gnu.org
2021-11-17 23:41 ` pinskia at gcc dot gnu.org
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