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* [Bug tree-optimization/22196] Missed back prop
[not found] <bug-22196-6528@http.gcc.gnu.org/bugzilla/>
@ 2007-02-09 16:10 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2007-02-09 16:10 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2007-02-09 16:10 -------
*** Bug 30747 has been marked as a duplicate of this bug. ***
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ak at muc dot de
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22196
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/22196] Missed back prop
[not found] <bug-22196-4@http.gcc.gnu.org/bugzilla/>
2021-06-08 9:12 ` pinskia at gcc dot gnu.org
2023-11-07 22:25 ` pinskia at gcc dot gnu.org
@ 2023-11-18 18:19 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-18 18:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=22196
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |goon.pri.low at gmail dot com
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 112608 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/22196] Missed back prop
[not found] <bug-22196-4@http.gcc.gnu.org/bugzilla/>
2021-06-08 9:12 ` pinskia at gcc dot gnu.org
@ 2023-11-07 22:25 ` pinskia at gcc dot gnu.org
2023-11-18 18:19 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-07 22:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=22196
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> This actually undos some of what phi-opt might do and only should be done
> for a few operations. I think divide, multiple, shifts and rotates should
> be done and only with a constant operand. This has to be done late very
> close to expand even.
>
> I will be implementing this but might miss GCC 12 as I have a lot on my
> plate already for GCC 12.
It turns out this is still true. I had implemented the binary factoring out of
operations for phiopt and end up with a failure with
`gcc.dg/tree-prof/val-prof-1.c` which depends on phiopt not doing this. Note
only one of the phi nodes needs to be constant for when we want to handle it.
Oh I wonder if val-prof-1.c is still going to fail since we had originally:
if (a == CST) b = CST/c; else b = a/c;
And now we might have removed the if .. Woops. Anyways I will have to go and
dig into that failure some more but this issue is now needed again too.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/22196] Missed back prop
[not found] <bug-22196-4@http.gcc.gnu.org/bugzilla/>
@ 2021-06-08 9:12 ` pinskia at gcc dot gnu.org
2023-11-07 22:25 ` pinskia at gcc dot gnu.org
2023-11-18 18:19 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-06-08 9:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=22196
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This actually undos some of what phi-opt might do and only should be done for a
few operations. I think divide, multiple, shifts and rotates should be done
and only with a constant operand. This has to be done late very close to
expand even.
I will be implementing this but might miss GCC 12 as I have a lot on my plate
already for GCC 12.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/22196] Missed back prop
2005-06-26 20:15 [Bug tree-optimization/22196] New: " pinskia at gcc dot gnu dot org
@ 2005-07-02 17:32 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-07-02 17:32 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-07-02 17:32 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2005-07-02 17:32:29
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22196
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-11-18 18:19 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-22196-6528@http.gcc.gnu.org/bugzilla/>
2007-02-09 16:10 ` [Bug tree-optimization/22196] Missed back prop pinskia at gcc dot gnu dot org
[not found] <bug-22196-4@http.gcc.gnu.org/bugzilla/>
2021-06-08 9:12 ` pinskia at gcc dot gnu.org
2023-11-07 22:25 ` pinskia at gcc dot gnu.org
2023-11-18 18:19 ` pinskia at gcc dot gnu.org
2005-06-26 20:15 [Bug tree-optimization/22196] New: " pinskia at gcc dot gnu dot org
2005-07-02 17:32 ` [Bug tree-optimization/22196] " pinskia at gcc dot gnu dot org
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