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* [Bug tree-optimization/98024] New: [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920
@ 2020-11-27 8:27 rguenth at gcc dot gnu.org
2020-11-27 8:28 ` [Bug tree-optimization/98024] " rguenth at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-11-27 8:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98024
Bug ID: 98024
Summary: [11 Regression] Big rnflow regression caused by
g:512c6ba04102295fccc62a173ee0086ca733c920
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
The rev. caused runtime for Polyhedron rnflow to regress from 7s to 13s.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/98024] [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920
2020-11-27 8:27 [Bug tree-optimization/98024] New: [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920 rguenth at gcc dot gnu.org
@ 2020-11-27 8:28 ` rguenth at gcc dot gnu.org
2020-11-27 9:51 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-11-27 8:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98024
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2020-11-27
Status|UNCONFIRMED |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |11.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/98024] [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920
2020-11-27 8:27 [Bug tree-optimization/98024] New: [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920 rguenth at gcc dot gnu.org
2020-11-27 8:28 ` [Bug tree-optimization/98024] " rguenth at gcc dot gnu.org
@ 2020-11-27 9:51 ` rguenth at gcc dot gnu.org
2020-11-27 11:25 ` marxin at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-11-27 9:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98024
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Stupid typo. Meh.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/98024] [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920
2020-11-27 8:27 [Bug tree-optimization/98024] New: [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920 rguenth at gcc dot gnu.org
2020-11-27 8:28 ` [Bug tree-optimization/98024] " rguenth at gcc dot gnu.org
2020-11-27 9:51 ` rguenth at gcc dot gnu.org
@ 2020-11-27 11:25 ` marxin at gcc dot gnu.org
2020-11-27 11:50 ` cvs-commit at gcc dot gnu.org
2020-11-27 11:51 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-11-27 11:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98024
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Acked by LNT:
https://lnt.opensuse.org/db_default/v4/CPP/graph?plot.0=14.791.0&plot.1=26.791.0&plot.2=171.791.0
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/98024] [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920
2020-11-27 8:27 [Bug tree-optimization/98024] New: [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920 rguenth at gcc dot gnu.org
` (2 preceding siblings ...)
2020-11-27 11:25 ` marxin at gcc dot gnu.org
@ 2020-11-27 11:50 ` cvs-commit at gcc dot gnu.org
2020-11-27 11:51 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-11-27 11:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98024
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:b6a7b72c6c91cc0d800a603a59e96fbcb07793ba
commit r11-5494-gb6a7b72c6c91cc0d800a603a59e96fbcb07793ba
Author: Richard Biener <rguenther@suse.de>
Date: Fri Nov 27 12:01:25 2020 +0100
tree-optimization/98024 - fix rnflow regression
The change to make PRE insertion iterate less had a typo in checking
successors RPO state. Fixing this exposes that regular PRE insertion
when facing a value that is the same on all edges inserts an
assignment in place of a PHI node but fails to set up things so that
this insertion is not repeated (it correctly does not return
'new_stuff'). But with the new iteration scheme this causes us
to repeatedly insert such assignment and change AVAIL_OUT over to
the newly inserted expression. The fix is to treat this as PHI
and insert into PHI_GEN, avoiding repetitive insertion.
2020-11-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/98024
* tree-ssa-pre.c (insert): Fix successor RPO order check.
(do_pre_regular_insertion): When inserting an assignment
in place of an all-same-value PHI still record that into
PHI_GEN.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/98024] [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920
2020-11-27 8:27 [Bug tree-optimization/98024] New: [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920 rguenth at gcc dot gnu.org
` (3 preceding siblings ...)
2020-11-27 11:50 ` cvs-commit at gcc dot gnu.org
@ 2020-11-27 11:51 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-11-27 11:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98024
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2020-11-27 8:27 [Bug tree-optimization/98024] New: [11 Regression] Big rnflow regression caused by g:512c6ba04102295fccc62a173ee0086ca733c920 rguenth at gcc dot gnu.org
2020-11-27 8:28 ` [Bug tree-optimization/98024] " rguenth at gcc dot gnu.org
2020-11-27 9:51 ` rguenth at gcc dot gnu.org
2020-11-27 11:25 ` marxin at gcc dot gnu.org
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2020-11-27 11:51 ` rguenth at gcc dot gnu.org
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