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* [Bug rtl-optimization/23812] swapping DImode halves produces poor x86 register allocation
[not found] <bug-23812-11337@http.gcc.gnu.org/bugzilla/>
@ 2005-10-18 17:44 ` michael dot meissner at amd dot com
2006-02-07 8:31 ` ian at airs dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 6+ messages in thread
From: michael dot meissner at amd dot com @ 2005-10-18 17:44 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from michael dot meissner at amd dot com 2005-10-18 17:44 -------
Note, since this is a rotate, the patches I proposed in 17886 will generate
much better code for this one case (basically mov/mov/xchgl -- it could be
improved by a peephole to do the moves directly instead of xchgl). However,
the more general subreg problem needs to be looked at.
--
michael dot meissner at amd dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |michael dot meissner at amd
| |dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23812
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/23812] swapping DImode halves produces poor x86 register allocation
[not found] <bug-23812-11337@http.gcc.gnu.org/bugzilla/>
2005-10-18 17:44 ` [Bug rtl-optimization/23812] swapping DImode halves produces poor x86 register allocation michael dot meissner at amd dot com
@ 2006-02-07 8:31 ` ian at airs dot com
2006-04-19 2:50 ` pinskia at gcc dot gnu dot org
2007-02-02 1:13 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 6+ messages in thread
From: ian at airs dot com @ 2006-02-07 8:31 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from ian at airs dot com 2006-02-07 08:31 -------
With my current set of subreg patches, for this test case with -O2
-momit-leaf-frame-pointer, I get this:
foo:
movl 4(%esp), %edx
movl 8(%esp), %eax
ret
which I suspect is optimal.
--
ian at airs dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ian at airs dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23812
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/23812] swapping DImode halves produces poor x86 register allocation
[not found] <bug-23812-11337@http.gcc.gnu.org/bugzilla/>
2005-10-18 17:44 ` [Bug rtl-optimization/23812] swapping DImode halves produces poor x86 register allocation michael dot meissner at amd dot com
2006-02-07 8:31 ` ian at airs dot com
@ 2006-04-19 2:50 ` pinskia at gcc dot gnu dot org
2007-02-02 1:13 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-04-19 2:50 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from pinskia at gcc dot gnu dot org 2006-04-19 02:50 -------
*** Bug 27202 has been marked as a duplicate of this bug. ***
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sb at biallas dot net
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23812
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/23812] swapping DImode halves produces poor x86 register allocation
[not found] <bug-23812-11337@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2006-04-19 2:50 ` pinskia at gcc dot gnu dot org
@ 2007-02-02 1:13 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2007-02-02 1:13 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from pinskia at gcc dot gnu dot org 2007-02-02 01:13 -------
Fixed by:
2007-01-31 Richard Henderson <rth@redhat.com>
Ian Lance Taylor <iant@google.com>
* lower-subreg.c: New file.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.3.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23812
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/23812] swapping DImode halves produces poor x86 register allocation
2005-09-11 2:01 [Bug rtl-optimization/23812] New: " raeburn at raeburn dot org
2005-09-11 14:22 ` [Bug rtl-optimization/23812] " pinskia at gcc dot gnu dot org
@ 2005-09-12 14:31 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-12 14:31 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-12 14:31 -------
Confirmed, basicially the same issue as PR 15792.
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |15792
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2005-09-12 14:31:14
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23812
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/23812] swapping DImode halves produces poor x86 register allocation
2005-09-11 2:01 [Bug rtl-optimization/23812] New: " raeburn at raeburn dot org
@ 2005-09-11 14:22 ` pinskia at gcc dot gnu dot org
2005-09-12 14:31 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-09-11 14:22 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-11 14:22 -------
This is the normal subreg problem with the current RA. There are a couple other bugs about this
already opened.
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Keywords| |missed-optimization, ra
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23812
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2007-02-02 1:13 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-23812-11337@http.gcc.gnu.org/bugzilla/>
2005-10-18 17:44 ` [Bug rtl-optimization/23812] swapping DImode halves produces poor x86 register allocation michael dot meissner at amd dot com
2006-02-07 8:31 ` ian at airs dot com
2006-04-19 2:50 ` pinskia at gcc dot gnu dot org
2007-02-02 1:13 ` pinskia at gcc dot gnu dot org
2005-09-11 2:01 [Bug rtl-optimization/23812] New: " raeburn at raeburn dot org
2005-09-11 14:22 ` [Bug rtl-optimization/23812] " pinskia at gcc dot gnu dot org
2005-09-12 14:31 ` pinskia at gcc dot gnu dot org
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