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* [Bug middle-end/19466] New: [meta-bug] bit-fields are non optimal
@ 2005-01-16 1:31 pinskia at gcc dot gnu dot org
2005-01-16 1:33 ` [Bug middle-end/19466] " pinskia at gcc dot gnu dot org
` (7 more replies)
0 siblings, 8 replies; 12+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-16 1:31 UTC (permalink / raw)
To: gcc-bugs
Just a place holder for referencing all of the missed-optimizations with bit-fields.
--
Summary: [meta-bug] bit-fields are non optimal
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Keywords: missed-optimization, meta-bug
Severity: enhancement
Priority: P2
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pinskia at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
2005-01-16 1:31 [Bug middle-end/19466] New: [meta-bug] bit-fields are non optimal pinskia at gcc dot gnu dot org
@ 2005-01-16 1:33 ` pinskia at gcc dot gnu dot org
2005-01-16 1:36 ` pinskia at gcc dot gnu dot org
` (6 subsequent siblings)
7 siblings, 0 replies; 12+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-16 1:33 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |336, 15826
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
2005-01-16 1:31 [Bug middle-end/19466] New: [meta-bug] bit-fields are non optimal pinskia at gcc dot gnu dot org
2005-01-16 1:33 ` [Bug middle-end/19466] " pinskia at gcc dot gnu dot org
@ 2005-01-16 1:36 ` pinskia at gcc dot gnu dot org
2005-01-27 0:13 ` rth at gcc dot gnu dot org
` (5 subsequent siblings)
7 siblings, 0 replies; 12+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-16 1:36 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-16 01:36 -------
CCing kazu because he opened most of the bugs.
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |kazu at cs dot umass dot edu
BugsThisDependsOn| |15256, 18029, 18030, 18031,
| |18038, 18041, 19331
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2005-01-16 01:36:06
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
2005-01-16 1:31 [Bug middle-end/19466] New: [meta-bug] bit-fields are non optimal pinskia at gcc dot gnu dot org
2005-01-16 1:33 ` [Bug middle-end/19466] " pinskia at gcc dot gnu dot org
2005-01-16 1:36 ` pinskia at gcc dot gnu dot org
@ 2005-01-27 0:13 ` rth at gcc dot gnu dot org
2005-02-20 0:46 ` roger at eyesopen dot com
` (4 subsequent siblings)
7 siblings, 0 replies; 12+ messages in thread
From: rth at gcc dot gnu dot org @ 2005-01-27 0:13 UTC (permalink / raw)
To: gcc-bugs
--
Bug 19466 depends on bug 18008, which changed state.
Bug 18008 Summary: [4.0 Regression] Duplicate mask on bitfield insertion
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18008
What |Old Value |New Value
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
2005-01-16 1:31 [Bug middle-end/19466] New: [meta-bug] bit-fields are non optimal pinskia at gcc dot gnu dot org
` (2 preceding siblings ...)
2005-01-27 0:13 ` rth at gcc dot gnu dot org
@ 2005-02-20 0:46 ` roger at eyesopen dot com
2005-03-02 16:08 ` kazu at cs dot umass dot edu
` (3 subsequent siblings)
7 siblings, 0 replies; 12+ messages in thread
From: roger at eyesopen dot com @ 2005-02-20 0:46 UTC (permalink / raw)
To: gcc-bugs
--
Bug 19466 depends on bug 336, which changed state.
Bug 336 Summary: Superfluous instructions generated from bit-field operations
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=336
What |Old Value |New Value
----------------------------------------------------------------------------
Status|SUSPENDED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
2005-01-16 1:31 [Bug middle-end/19466] New: [meta-bug] bit-fields are non optimal pinskia at gcc dot gnu dot org
` (3 preceding siblings ...)
2005-02-20 0:46 ` roger at eyesopen dot com
@ 2005-03-02 16:08 ` kazu at cs dot umass dot edu
2005-03-02 16:08 ` kazu at cs dot umass dot edu
` (2 subsequent siblings)
7 siblings, 0 replies; 12+ messages in thread
From: kazu at cs dot umass dot edu @ 2005-03-02 16:08 UTC (permalink / raw)
To: gcc-bugs
--
Bug 19466 depends on bug 18030, which changed state.
Bug 18030 Summary: OR is inefficient in 2-bit bitfield
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18030
What |Old Value |New Value
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
2005-01-16 1:31 [Bug middle-end/19466] New: [meta-bug] bit-fields are non optimal pinskia at gcc dot gnu dot org
` (4 preceding siblings ...)
2005-03-02 16:08 ` kazu at cs dot umass dot edu
@ 2005-03-02 16:08 ` kazu at cs dot umass dot edu
2005-03-14 3:58 ` pinskia at gcc dot gnu dot org
2005-06-23 5:02 ` pinskia at gcc dot gnu dot org
7 siblings, 0 replies; 12+ messages in thread
From: kazu at cs dot umass dot edu @ 2005-03-02 16:08 UTC (permalink / raw)
To: gcc-bugs
--
Bug 19466 depends on bug 18029, which changed state.
Bug 18029 Summary: an xor of a single bit bitfield is inefficient
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18029
What |Old Value |New Value
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
2005-01-16 1:31 [Bug middle-end/19466] New: [meta-bug] bit-fields are non optimal pinskia at gcc dot gnu dot org
` (5 preceding siblings ...)
2005-03-02 16:08 ` kazu at cs dot umass dot edu
@ 2005-03-14 3:58 ` pinskia at gcc dot gnu dot org
2005-06-23 5:02 ` pinskia at gcc dot gnu dot org
7 siblings, 0 replies; 12+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-03-14 3:58 UTC (permalink / raw)
To: gcc-bugs
--
Bug 19466 depends on bug 19331, which changed state.
Bug 19331 Summary: [4.0 Regression] Inefficient code generated for bitfield assignment
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
What |Old Value |New Value
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
2005-01-16 1:31 [Bug middle-end/19466] New: [meta-bug] bit-fields are non optimal pinskia at gcc dot gnu dot org
` (6 preceding siblings ...)
2005-03-14 3:58 ` pinskia at gcc dot gnu dot org
@ 2005-06-23 5:02 ` pinskia at gcc dot gnu dot org
7 siblings, 0 replies; 12+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-06-23 5:02 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |22156
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
[not found] <bug-19466-4@http.gcc.gnu.org/bugzilla/>
2020-04-19 18:28 ` law at redhat dot com
@ 2021-07-26 23:48 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 12+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-07-26 23:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |pinskia at gcc dot gnu.org
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Mine but I suspect this won't be until next year.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
[not found] <bug-19466-4@http.gcc.gnu.org/bugzilla/>
@ 2020-04-19 18:28 ` law at redhat dot com
2021-07-26 23:48 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 12+ messages in thread
From: law at redhat dot com @ 2020-04-19 18:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
Bug 19466 depends on bug 15826, which changed state.
Bug 15826 Summary: don't use "if" to extract a single bit bit-field.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15826
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/19466] [meta-bug] bit-fields are non optimal
[not found] <bug-19466-6528@http.gcc.gnu.org/bugzilla/>
@ 2006-04-27 19:10 ` steven at gcc dot gnu dot org
0 siblings, 0 replies; 12+ messages in thread
From: steven at gcc dot gnu dot org @ 2006-04-27 19:10 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from steven at gcc dot gnu dot org 2006-04-27 19:10 -------
Patches addressing some of the issues:
http://gcc.gnu.org/ml/gcc-patches/2006-04/msg00969.html
http://gcc.gnu.org/ml/gcc-patches/2006-04/msg01049.html
I'm linking them from here for reference.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19466
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2021-07-26 23:48 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-01-16 1:31 [Bug middle-end/19466] New: [meta-bug] bit-fields are non optimal pinskia at gcc dot gnu dot org
2005-01-16 1:33 ` [Bug middle-end/19466] " pinskia at gcc dot gnu dot org
2005-01-16 1:36 ` pinskia at gcc dot gnu dot org
2005-01-27 0:13 ` rth at gcc dot gnu dot org
2005-02-20 0:46 ` roger at eyesopen dot com
2005-03-02 16:08 ` kazu at cs dot umass dot edu
2005-03-02 16:08 ` kazu at cs dot umass dot edu
2005-03-14 3:58 ` pinskia at gcc dot gnu dot org
2005-06-23 5:02 ` pinskia at gcc dot gnu dot org
[not found] <bug-19466-6528@http.gcc.gnu.org/bugzilla/>
2006-04-27 19:10 ` steven at gcc dot gnu dot org
[not found] <bug-19466-4@http.gcc.gnu.org/bugzilla/>
2020-04-19 18:28 ` law at redhat dot com
2021-07-26 23:48 ` pinskia at gcc dot gnu.org
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