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* [Bug tree-optimization/54627] New: VRP uses lots of memory and compile-time
@ 2012-09-19 14:24 rguenth at gcc dot gnu.org
2012-10-01 20:41 ` [Bug tree-optimization/54627] " steven at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-09-19 14:24 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54627
Bug #: 54627
Summary: VRP uses lots of memory and compile-time
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Keywords: compile-time-hog, memory-hog
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: rguenth@gcc.gnu.org
Part of it is due to equivalence set bitmaps becoming huge (and their
inefficient computation). equivalences are only used when trying to
simplify comparisons (but during iteration). So the only used
equivalence bitmaps are for operands of those. equivalences are
generated only by asserts and SSA name copies, so they can be computed
up-front and shouldn't change (apart from handling of non-executable
edges in PHI nodes) during iteration. At least equivalence processing
can be ignored for SSA name chains not leading up to a condition operand.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/54627] VRP uses lots of memory and compile-time
2012-09-19 14:24 [Bug tree-optimization/54627] New: VRP uses lots of memory and compile-time rguenth at gcc dot gnu.org
@ 2012-10-01 20:41 ` steven at gcc dot gnu.org
2013-03-18 9:49 ` steven at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: steven at gcc dot gnu.org @ 2012-10-01 20:41 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54627
Steven Bosscher <steven at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-10-01
Ever Confirmed|0 |1
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/54627] VRP uses lots of memory and compile-time
2012-09-19 14:24 [Bug tree-optimization/54627] New: VRP uses lots of memory and compile-time rguenth at gcc dot gnu.org
2012-10-01 20:41 ` [Bug tree-optimization/54627] " steven at gcc dot gnu.org
@ 2013-03-18 9:49 ` steven at gcc dot gnu.org
2013-03-18 10:04 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: steven at gcc dot gnu.org @ 2013-03-18 9:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54627
Steven Bosscher <steven at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #1 from Steven Bosscher <steven at gcc dot gnu.org> 2013-03-18 09:48:48 UTC ---
Is there a test case for this PR? I've seen this behavior in other PRs
but I can't find them. It'd be nice to have this bug linked to such
cases (and to the "GCC is slow" meta-bug).
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/54627] VRP uses lots of memory and compile-time
2012-09-19 14:24 [Bug tree-optimization/54627] New: VRP uses lots of memory and compile-time rguenth at gcc dot gnu.org
2012-10-01 20:41 ` [Bug tree-optimization/54627] " steven at gcc dot gnu.org
2013-03-18 9:49 ` steven at gcc dot gnu.org
@ 2013-03-18 10:04 ` rguenth at gcc dot gnu.org
2023-05-04 5:48 ` aldyh at gcc dot gnu.org
2023-05-04 9:29 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-03-18 10:04 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54627
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-18 10:03:33 UTC ---
I filed this bug when working on PR56113.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/54627] VRP uses lots of memory and compile-time
2012-09-19 14:24 [Bug tree-optimization/54627] New: VRP uses lots of memory and compile-time rguenth at gcc dot gnu.org
` (2 preceding siblings ...)
2013-03-18 10:04 ` rguenth at gcc dot gnu.org
@ 2023-05-04 5:48 ` aldyh at gcc dot gnu.org
2023-05-04 9:29 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: aldyh at gcc dot gnu.org @ 2023-05-04 5:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54627
Aldy Hernandez <aldyh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aldyh at gcc dot gnu.org
--- Comment #3 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Just ran into this while looking for something else. Should this be closed, as
the implementation of VRP is different now? (i.e. no equivalence set bitmaps).
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/54627] VRP uses lots of memory and compile-time
2012-09-19 14:24 [Bug tree-optimization/54627] New: VRP uses lots of memory and compile-time rguenth at gcc dot gnu.org
` (3 preceding siblings ...)
2023-05-04 5:48 ` aldyh at gcc dot gnu.org
@ 2023-05-04 9:29 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-05-04 9:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54627
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Definitely, this looks specific to the old implementation. I'm re-evaluating
PR56113.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2023-05-04 9:29 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2012-09-19 14:24 [Bug tree-optimization/54627] New: VRP uses lots of memory and compile-time rguenth at gcc dot gnu.org
2012-10-01 20:41 ` [Bug tree-optimization/54627] " steven at gcc dot gnu.org
2013-03-18 9:49 ` steven at gcc dot gnu.org
2013-03-18 10:04 ` rguenth at gcc dot gnu.org
2023-05-04 5:48 ` aldyh at gcc dot gnu.org
2023-05-04 9:29 ` rguenth at gcc dot gnu.org
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