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* [Bug tree-optimization/30049] Variable-length arrays (VLA) should be converted to normal arrays if possible
[not found] <bug-30049-4@http.gcc.gnu.org/bugzilla/>
@ 2023-08-04 19:40 ` pinskia at gcc dot gnu.org
2023-08-04 19:46 ` pinskia at gcc dot gnu.org
2023-08-07 8:46 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-08-04 19:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30049
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 55690
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55690&action=edit
testcase
[apinski@xeond2 upstream-gcc-git]$ ~/upstream-gcc/bin/gcc t.c -march=opteron
-ffast-math -funroll-loops -ftree-vectorize -msse3 -O3 -g
[apinski@xeond2 upstream-gcc-git]$ time ./a.out
real 0m1.522s
user 0m1.517s
sys 0m0.001s
[apinski@xeond2 upstream-gcc-git]$ ~/upstream-gcc/bin/gcc t.c -march=opteron
-ffast-math -funroll-loops -ftree-vectorize -msse3 -O3 -g -DNORMAL_ARRAY
[apinski@xeond2 upstream-gcc-git]$ time ./a.out
real 0m0.356s
user 0m0.352s
sys 0m0.002s
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/30049] Variable-length arrays (VLA) should be converted to normal arrays if possible
[not found] <bug-30049-4@http.gcc.gnu.org/bugzilla/>
2023-08-04 19:40 ` [Bug tree-optimization/30049] Variable-length arrays (VLA) should be converted to normal arrays if possible pinskia at gcc dot gnu.org
@ 2023-08-04 19:46 ` pinskia at gcc dot gnu.org
2023-08-07 8:46 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-08-04 19:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30049
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The only difference I saw is scheduling and some small IV-OPTs difference ...
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/30049] Variable-length arrays (VLA) should be converted to normal arrays if possible
[not found] <bug-30049-4@http.gcc.gnu.org/bugzilla/>
2023-08-04 19:40 ` [Bug tree-optimization/30049] Variable-length arrays (VLA) should be converted to normal arrays if possible pinskia at gcc dot gnu.org
2023-08-04 19:46 ` pinskia at gcc dot gnu.org
@ 2023-08-07 8:46 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-08-07 8:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30049
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jsm28 at gcc dot gnu.org
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
The specific case with a const int NODES might be also something the frontend
is allowed to optimize? Still the case where constant propagation can figure
out the bound could be optimized. I'll note that using a VLA can sometimes
reduce
stack usage.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/30049] Variable-length arrays (VLA) should be converted to normal arrays if possible
2006-12-02 10:30 [Bug c/30049] New: " burnus at gcc dot gnu dot org
2006-12-02 17:02 ` [Bug tree-optimization/30049] " pinskia at gcc dot gnu dot org
@ 2006-12-02 22:25 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-12-02 22:25 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2006-12-02 22:25 -------
Confirmed.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2006-12-02 22:25:12
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30049
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/30049] Variable-length arrays (VLA) should be converted to normal arrays if possible
2006-12-02 10:30 [Bug c/30049] New: " burnus at gcc dot gnu dot org
@ 2006-12-02 17:02 ` pinskia at gcc dot gnu dot org
2006-12-02 22:25 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-12-02 17:02 UTC (permalink / raw)
To: gcc-bugs
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Component|c |tree-optimization
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30049
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-08-07 8:46 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-30049-4@http.gcc.gnu.org/bugzilla/>
2023-08-04 19:40 ` [Bug tree-optimization/30049] Variable-length arrays (VLA) should be converted to normal arrays if possible pinskia at gcc dot gnu.org
2023-08-04 19:46 ` pinskia at gcc dot gnu.org
2023-08-07 8:46 ` rguenth at gcc dot gnu.org
2006-12-02 10:30 [Bug c/30049] New: " burnus at gcc dot gnu dot org
2006-12-02 17:02 ` [Bug tree-optimization/30049] " pinskia at gcc dot gnu dot org
2006-12-02 22:25 ` pinskia at gcc dot gnu dot org
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