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* [Bug tree-optimization/18048] New: mgrid loop performance regression with ivopts
@ 2004-10-18 19:22 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
` (23 more replies)
0 siblings, 24 replies; 25+ messages in thread
From: dje at gcc dot gnu dot org @ 2004-10-18 19:22 UTC (permalink / raw)
To: gcc-bugs
172.mgrid performance degraded after ivopts were introduced. The patch to
improve iv selection did not improve the performance. This is separate from
the register pressure problems. The tree loop optimization appears to be
leaving unnecessary computations in loops.
--
Summary: mgrid loop performance regression with ivopts
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dje at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: *-*-*
GCC host triplet: *-*-*
GCC target triplet: *-*-*
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 25+ 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 ` pinskia at gcc dot gnu dot org
2004-10-19 16:46 ` matz at suse dot de
` (22 subsequent siblings)
23 siblings, 0 replies; 25+ 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] 25+ 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
` (21 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
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] 25+ 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
` (20 subsequent siblings)
23 siblings, 0 replies; 25+ 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] 25+ 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
` (19 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
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] 25+ 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
` (18 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
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
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048
^ permalink raw reply [flat|nested] 25+ 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
` (17 subsequent siblings)
23 siblings, 0 replies; 25+ 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] 25+ 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; 25+ 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] 25+ 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; 25+ 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.
--
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^ permalink raw reply [flat|nested] 25+ 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
` (14 subsequent siblings)
23 siblings, 0 replies; 25+ 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] 25+ 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
` (13 subsequent siblings)
23 siblings, 0 replies; 25+ 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] 25+ 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
` (12 subsequent siblings)
23 siblings, 0 replies; 25+ 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] 25+ 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
` (11 subsequent siblings)
23 siblings, 0 replies; 25+ 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] 25+ 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
` (10 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
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] 25+ 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
` (9 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
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] 25+ 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
` (8 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
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
--
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* [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
` (7 subsequent siblings)
23 siblings, 0 replies; 25+ messages in thread
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] 25+ 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; 25+ 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] 25+ 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; 25+ 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.
--
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* [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
` (4 subsequent siblings)
23 siblings, 0 replies; 25+ 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] 25+ 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; 25+ 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
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* [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)
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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
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* [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; 25+ 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] 25+ 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; 25+ 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] 25+ 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; 25+ 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] 25+ messages in thread
end of thread, other threads:[~2005-09-27 15:55 UTC | newest]
Thread overview: 25+ messages (download: mbox.gz / follow: Atom feed)
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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
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
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
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
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
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
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
2005-07-08 1:34 ` mmitchel at gcc dot gnu dot org
2005-09-27 15:57 ` mmitchel at gcc dot gnu dot org
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