* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
@ 2004-10-18 19:24 ` pinskia at gcc dot gnu dot org
2004-10-19 16:46 ` matz at suse dot de
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23 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-18 19:24 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |rakdver at gcc dot gnu dot
| |org
Keywords| |missed-optimization
Summary|mgrid loop performance |[4.0 Regression] mgrid loop
|regression with ivopts |performance regression with
| |ivopts
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
2004-10-18 19:24 ` [Bug tree-optimization/18048] [4.0 Regression] " pinskia at gcc dot gnu dot org
@ 2004-10-19 16:46 ` matz at suse dot de
2004-10-22 17:35 ` pinskia at gcc dot gnu dot org
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From: matz at suse dot de @ 2004-10-19 16:46 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From matz at suse dot de 2004-10-19 16:46 -------
Does this go away with "--param iv-consider-all-candidates-bound=70" ?
(Or with a higher number like 100 or 1000)
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |matz at suse dot de
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
2004-10-18 19:24 ` [Bug tree-optimization/18048] [4.0 Regression] " pinskia at gcc dot gnu dot org
2004-10-19 16:46 ` matz at suse dot de
@ 2004-10-22 17:35 ` pinskia at gcc dot gnu dot org
2004-10-22 18:39 ` dje at gcc dot gnu dot org
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23 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-22 17:35 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-10-22 17:35 -------
I think this can be confirmed because you can see the drop on Diego's SPEC tester:
<http://people.redhat.com/dnovillo/spec2000/gcc/individual-run-ratio.html>.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-10-22 17:35:50
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (2 preceding siblings ...)
2004-10-22 17:35 ` pinskia at gcc dot gnu dot org
@ 2004-10-22 18:39 ` dje at gcc dot gnu dot org
2004-10-22 21:16 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
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From: dje at gcc dot gnu dot org @ 2004-10-22 18:39 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From dje at gcc dot gnu dot org 2004-10-22 18:39 -------
Daniel's DOM loop depth patch might help with this problem as well.
http://gcc.gnu.org/ml/gcc-patches/2004-10/msg00931.html
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (3 preceding siblings ...)
2004-10-22 18:39 ` dje at gcc dot gnu dot org
@ 2004-10-22 21:16 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
2004-10-27 20:27 ` cvs-commit at gcc dot gnu dot org
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From: rakdver at atrey dot karlin dot mff dot cuni dot cz @ 2004-10-22 21:16 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz 2004-10-22 21:16 -------
Subject: Re: [4.0 Regression] mgrid loop performance regression with ivopts
> Daniel's DOM loop depth patch might help with this problem as well.
> http://gcc.gnu.org/ml/gcc-patches/2004-10/msg00931.html
Probably not (although large part of the regression is indeed caused by
ivopts -- dom interaction, it seems to be of quite different type).
I am just testing a patch that significantly decreases the regression
(unfortunately, some 10% remain even with the patch; hopefully I will
find reason for them soon).
Zdenek
--
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^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (4 preceding siblings ...)
2004-10-22 21:16 ` rakdver at atrey dot karlin dot mff dot cuni dot cz
@ 2004-10-27 20:27 ` cvs-commit at gcc dot gnu dot org
2004-11-27 21:17 ` neroden at gcc dot gnu dot org
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23 siblings, 0 replies; 30+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-10-27 20:27 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-10-27 20:27 -------
Subject: Bug 18048
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: rakdver@gcc.gnu.org 2004-10-27 20:27:21
Modified files:
gcc : ChangeLog fold-const.c tree-ssa-loop-ivopts.c
tree-ssa-loop-niter.c tree.c tree.h
Log message:
PR tree-optimization/18048
* fold-const.c (try_move_mult_to_index): New function.
(fold): Use try_move_mult_to_index.
* tree-ssa-loop-ivopts.c (try_add_cand_for): Prefer common candidates.
* tree-ssa-loop-niter.c (number_of_iterations_cond): Produce
an all-ones unsigned constant without extra bits.
* tree.c (build_low_bits_mask): New function.
* tree.h (build_low_bits_mask): Declare.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.6052&r2=2.6053
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.468&r2=1.469
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-loop-ivopts.c.diff?cvsroot=gcc&r1=2.20&r2=2.21
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-loop-niter.c.diff?cvsroot=gcc&r1=2.13&r2=2.14
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.c.diff?cvsroot=gcc&r1=1.440&r2=1.441
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.h.diff?cvsroot=gcc&r1=1.640&r2=1.641
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (5 preceding siblings ...)
2004-10-27 20:27 ` cvs-commit at gcc dot gnu dot org
@ 2004-11-27 21:17 ` neroden at gcc dot gnu dot org
2004-12-26 14:50 ` pinskia at gcc dot gnu dot org
` (16 subsequent siblings)
23 siblings, 0 replies; 30+ messages in thread
From: neroden at gcc dot gnu dot org @ 2004-11-27 21:17 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
OtherBugsDependingO| |18693
nThis| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (6 preceding siblings ...)
2004-11-27 21:17 ` neroden at gcc dot gnu dot org
@ 2004-12-26 14:50 ` pinskia at gcc dot gnu dot org
2004-12-26 14:58 ` pinskia at gcc dot gnu dot org
` (15 subsequent siblings)
23 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-12-26 14:50 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-26 14:50 -------
PR 19038 shows up here also but not introduced by ivopts related.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (7 preceding siblings ...)
2004-12-26 14:50 ` pinskia at gcc dot gnu dot org
@ 2004-12-26 14:58 ` pinskia at gcc dot gnu dot org
2005-01-06 23:02 ` pinskia at gcc dot gnu dot org
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23 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-12-26 14:58 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-26 14:58 -------
(In reply to comment #6)
> PR 19038 shows up here also but not introduced by ivopts related.
Though IV-OPTS helps fixing some of these.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (8 preceding siblings ...)
2004-12-26 14:58 ` pinskia at gcc dot gnu dot org
@ 2005-01-06 23:02 ` pinskia at gcc dot gnu dot org
2005-01-22 16:49 ` dberlin at gcc dot gnu dot org
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23 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-06 23:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-06 23:02 -------
Actually I think the remaining issues of the mgrid performance regression are caused by PR 19038.
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |19038
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (9 preceding siblings ...)
2005-01-06 23:02 ` pinskia at gcc dot gnu dot org
@ 2005-01-22 16:49 ` dberlin at gcc dot gnu dot org
2005-01-22 17:54 ` pinskia at gcc dot gnu dot org
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23 siblings, 0 replies; 30+ messages in thread
From: dberlin at gcc dot gnu dot org @ 2005-01-22 16:49 UTC (permalink / raw)
To: gcc-bugs
--
Bug 18048 depends on bug 19038, which changed state.
Bug 19038 Summary: [4.0 Regression] tree-ssa causing loops to have more than one BB
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19038
What |Old Value |New Value
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (10 preceding siblings ...)
2005-01-22 16:49 ` dberlin at gcc dot gnu dot org
@ 2005-01-22 17:54 ` pinskia at gcc dot gnu dot org
2005-01-22 21:37 ` pinskia at gcc dot gnu dot org
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23 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-22 17:54 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-22 17:54 -------
(In reply to comment #8)
> Actually I think the remaining issues of the mgrid performance regression are caused by PR 19038.
Well I looked the assembly and it looks like a regresiter allocator problem now because with -fno-
ivopts we don't spill but with it turned we do.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (11 preceding siblings ...)
2005-01-22 17:54 ` pinskia at gcc dot gnu dot org
@ 2005-01-22 21:37 ` pinskia at gcc dot gnu dot org
2005-01-23 0:24 ` steven at gcc dot gnu dot org
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From: pinskia at gcc dot gnu dot org @ 2005-01-22 21:37 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-22 21:37 -------
If I have a smaller testcase but the loop is still looks like what is in mgrid can I paste it here, it is only
30 lines?
--
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^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (12 preceding siblings ...)
2005-01-22 21:37 ` pinskia at gcc dot gnu dot org
@ 2005-01-23 0:24 ` steven at gcc dot gnu dot org
2005-01-23 13:17 ` steven at gcc dot gnu dot org
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From: steven at gcc dot gnu dot org @ 2005-01-23 0:24 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From steven at gcc dot gnu dot org 2005-01-23 00:24 -------
The mgrid score on AMD64 jumps 30% with my patch for PR19464 applied.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |mark at codesourcery dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (13 preceding siblings ...)
2005-01-23 0:24 ` steven at gcc dot gnu dot org
@ 2005-01-23 13:17 ` steven at gcc dot gnu dot org
2005-01-30 4:37 ` [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts (register pressure) pinskia at gcc dot gnu dot org
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From: steven at gcc dot gnu dot org @ 2005-01-23 13:17 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From steven at gcc dot gnu dot org 2005-01-23 13:17 -------
Andrew, 30 lines is quite OK to paste if you rename things a bit ;-)
You'll find that mgrid.f is already available on the web anyway:
http://www.cs.duke.edu/~tavi/scheduling/mgrid.f
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts (register pressure)
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (14 preceding siblings ...)
2005-01-23 13:17 ` steven at gcc dot gnu dot org
@ 2005-01-30 4:37 ` pinskia at gcc dot gnu dot org
2005-02-10 22:59 ` pinskia at gcc dot gnu dot org
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From: pinskia at gcc dot gnu dot org @ 2005-01-30 4:37 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-30 04:36 -------
PR 19701 is an example of where ivopts causes a regression in that we create too many IVs.
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |19701
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts (register pressure)
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (15 preceding siblings ...)
2005-01-30 4:37 ` [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts (register pressure) pinskia at gcc dot gnu dot org
@ 2005-02-10 22:59 ` pinskia at gcc dot gnu dot org
2005-02-11 0:37 ` pinskia at gcc dot gnu dot org
` (6 subsequent siblings)
23 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-10 22:59 UTC (permalink / raw)
To: gcc-bugs
--
Bug 18048 depends on bug 19701, which changed state.
Bug 19701 Summary: [4.0 regression] Way too many IVs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19701
What |Old Value |New Value
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts (register pressure)
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (16 preceding siblings ...)
2005-02-10 22:59 ` pinskia at gcc dot gnu dot org
@ 2005-02-11 0:37 ` pinskia at gcc dot gnu dot org
2005-02-14 15:48 ` steven at gcc dot gnu dot org
` (5 subsequent siblings)
23 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-11 0:37 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-10 21:15 -------
I looked at the code generation after Zdenek's patch for PR 19701 and it looks much better but I don't
have a machine to test SPEC on.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts (register pressure)
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (17 preceding siblings ...)
2005-02-11 0:37 ` pinskia at gcc dot gnu dot org
@ 2005-02-14 15:48 ` steven at gcc dot gnu dot org
2005-02-14 20:06 ` pinskia at gcc dot gnu dot org
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23 siblings, 0 replies; 30+ messages in thread
From: steven at gcc dot gnu dot org @ 2005-02-14 15:48 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From steven at gcc dot gnu dot org 2005-02-14 10:22 -------
Is this fixed now?
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts (register pressure)
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (18 preceding siblings ...)
2005-02-14 15:48 ` steven at gcc dot gnu dot org
@ 2005-02-14 20:06 ` pinskia at gcc dot gnu dot org
2005-02-14 20:22 ` dje at gcc dot gnu dot org
` (3 subsequent siblings)
23 siblings, 0 replies; 30+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-14 20:06 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-14 15:52 -------
(In reply to comment #15)
> Is this fixed now?
No, it regressed again.
See <http://gcc.gnu.org/ml/gcc-patches/2005-02/msg00507.html>.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Last reconfirmed|2004-10-22 17:35:50 |2005-02-14 15:52:02
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts (register pressure)
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (19 preceding siblings ...)
2005-02-14 20:06 ` pinskia at gcc dot gnu dot org
@ 2005-02-14 20:22 ` dje at gcc dot gnu dot org
2005-04-21 4:58 ` [Bug tree-optimization/18048] [4.0/4.1 " mmitchel at gcc dot gnu dot org
` (2 subsequent siblings)
23 siblings, 0 replies; 30+ messages in thread
From: dje at gcc dot gnu dot org @ 2005-02-14 20:22 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From dje at gcc dot gnu dot org 2005-02-14 16:03 -------
With -O2/-O3 -funroll loops -fswitch-loops -fpeel-loops, mgrid (and swim) no
longer regress. With just -O2/-O3, performance regression for mgrid remains
(and swim performance dropped dramatically).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0/4.1 Regression] mgrid loop performance regression with ivopts (register pressure)
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (20 preceding siblings ...)
2005-02-14 20:22 ` dje at gcc dot gnu dot org
@ 2005-04-21 4:58 ` mmitchel at gcc dot gnu dot org
2005-07-08 1:34 ` mmitchel at gcc dot gnu dot org
2005-09-27 15:57 ` mmitchel at gcc dot gnu dot org
23 siblings, 0 replies; 30+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2005-04-21 4:58 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.0.0 |4.0.1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0/4.1 Regression] mgrid loop performance regression with ivopts (register pressure)
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (21 preceding siblings ...)
2005-04-21 4:58 ` [Bug tree-optimization/18048] [4.0/4.1 " mmitchel at gcc dot gnu dot org
@ 2005-07-08 1:34 ` mmitchel at gcc dot gnu dot org
2005-09-27 15:57 ` mmitchel at gcc dot gnu dot org
23 siblings, 0 replies; 30+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2005-07-08 1:34 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.0.1 |4.0.2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread
* [Bug tree-optimization/18048] [4.0/4.1 Regression] mgrid loop performance regression with ivopts (register pressure)
2004-10-18 19:22 [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts dje at gcc dot gnu dot org
` (22 preceding siblings ...)
2005-07-08 1:34 ` mmitchel at gcc dot gnu dot org
@ 2005-09-27 15:57 ` mmitchel at gcc dot gnu dot org
23 siblings, 0 replies; 30+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2005-09-27 15:57 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.0.2 |4.0.3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 30+ messages in thread