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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/37534] [4.4 Regression] IRA causes 17% degradation in 187.facerec benchmark
Date: Tue, 16 Sep 2008 01:05:00 -0000 [thread overview]
Message-ID: <20080916010428.31254.qmail@sourceware.org> (raw)
In-Reply-To: <bug-37534-16550@http.gcc.gnu.org/bugzilla/>
------- Comment #4 from pinskia at gcc dot gnu dot org 2008-09-16 01:04 -------
The first thing I noticed (this for both with/without IRA), is that we are
moving from cr and then comparing right away:
+ mfcr %r0,1
+ rlwinm %r0,%r0,30,1
...
+ cmpdi %cr7,%r0,0
Why is that?
The other thing I noticed for the tree level (still without/with IRA), is that
FRAME.98 is not SRA'ed because we take the address of one of the elements even
though we know that cannot be done on the normal pointer tricks on it (see PR
17217 which I had forgot to reopen when the code was disabled).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37534
next prev parent reply other threads:[~2008-09-16 1:05 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-15 23:45 [Bug tree-optimization/37534] New: " luisgpm at linux dot vnet dot ibm dot com
2008-09-15 23:47 ` [Bug tree-optimization/37534] " luisgpm at linux dot vnet dot ibm dot com
2008-09-15 23:50 ` pinskia at gcc dot gnu dot org
2008-09-15 23:51 ` pinskia at gcc dot gnu dot org
2008-09-16 1:05 ` pinskia at gcc dot gnu dot org [this message]
2008-09-16 1:16 ` [Bug rtl-optimization/37534] " pinskia at gcc dot gnu dot org
2008-09-16 1:31 ` pinskia at gcc dot gnu dot org
2008-09-16 2:28 ` luisgpm at linux dot vnet dot ibm dot com
2008-09-16 13:02 ` rguenth at gcc dot gnu dot org
2008-10-22 3:11 ` mmitchel at gcc dot gnu dot org
2008-10-22 14:01 ` vmakarov at redhat dot com
2009-02-03 9:46 ` bonzini at gnu dot org
2009-02-03 14:48 ` vmakarov at redhat dot com
2009-02-03 14:56 ` bonzini at gnu dot org
2009-02-03 14:57 ` bonzini at gnu dot org
2009-04-21 16:02 ` [Bug rtl-optimization/37534] [4.4/4.5 " jakub at gcc dot gnu dot org
2009-07-22 10:35 ` jakub at gcc dot gnu dot org
2009-10-15 12:58 ` jakub at gcc dot gnu dot org
2010-01-21 13:19 ` jakub at gcc dot gnu dot org
2010-04-30 8:56 ` [Bug rtl-optimization/37534] [4.4/4.5/4.6 " jakub at gcc dot gnu dot org
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