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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/53726] [4.8 Regression] aes test performance drop for eembc_2_0_peak_32
Date: Wed, 20 Jun 2012 14:36:00 -0000 [thread overview]
Message-ID: <bug-53726-4-1P0JRZ3ZyG@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-53726-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53726
--- Comment #11 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-20 14:36:00 UTC ---
(In reply to comment #9)
> (In reply to comment #3)
> > I added executable testcase. Command line to compile
> >
> > gcc -g -ansi -O3 -ffast-math -msse2 -mfpmath=sse -m32 -static -march=corei7
> > -mtune=corei7 test.c m.c
> >
>
> Please compare results without -static.
Same results. memcpy ends up here:
Dump of assembler code for function memcpy:
=> 0xf7ed0cc0 <+0>: push %edi
0xf7ed0cc1 <+1>: push %esi
0xf7ed0cc2 <+2>: mov 0xc(%esp),%edi
0xf7ed0cc6 <+6>: mov 0x10(%esp),%esi
0xf7ed0cca <+10>: mov 0x14(%esp),%ecx
0xf7ed0cce <+14>: mov %edi,%eax
0xf7ed0cd0 <+16>: cld
0xf7ed0cd1 <+17>: cmp $0x20,%ecx
0xf7ed0cd4 <+20>: jbe 0xf7ed0d2c <memcpy+108>
...
0xf7ed0d2c <+108>: rep movsb %ds:(%esi),%es:(%edi)
0xf7ed0d2e <+110>: pop %esi
0xf7ed0d2f <+111>: pop %edi
0xf7ed0d30 <+112>: ret
this seems to be sysdeps/i386/i586/memcpy.S
next prev parent reply other threads:[~2012-06-20 14:36 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-20 6:10 [Bug c/53726] New: " vbyakovl23 at gmail dot com
2012-06-20 6:13 ` [Bug c/53726] " vbyakovl23 at gmail dot com
2012-06-20 9:28 ` [Bug tree-optimization/53726] " rguenth at gcc dot gnu.org
2012-06-20 10:48 ` vbyakovl23 at gmail dot com
2012-06-20 10:50 ` vbyakovl23 at gmail dot com
2012-06-20 11:48 ` rguenth at gcc dot gnu.org
2012-06-20 12:31 ` rguenth at gcc dot gnu.org
2012-06-20 12:47 ` hjl.tools at gmail dot com
2012-06-20 13:30 ` rguenther at suse dot de
2012-06-20 14:20 ` hjl.tools at gmail dot com
2012-06-20 14:35 ` vbyakovl23 at gmail dot com
2012-06-20 14:36 ` rguenth at gcc dot gnu.org [this message]
2012-06-20 14:44 ` hjl.tools at gmail dot com
2012-06-20 14:47 ` hjl.tools at gmail dot com
2012-06-20 14:52 ` hjl.tools at gmail dot com
2012-06-20 14:55 ` rguenther at suse dot de
2012-06-20 15:10 ` rguenth at gcc dot gnu.org
2012-06-20 15:37 ` hjl.tools at gmail dot com
2012-06-21 8:47 ` rguenther at suse dot de
2012-06-21 12:47 ` vbyakovl23 at gmail dot com
2012-06-21 12:51 ` hjl.tools at gmail dot com
2012-06-21 12:56 ` hjl.tools at gmail dot com
2012-06-22 22:46 ` hubicka at ucw dot cz
2012-06-22 23:04 ` Jan Hubicka
2012-06-22 23:05 ` hubicka at ucw dot cz
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