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* [Bug target/113859] New: popcount HI can be vectorized for non-SVE
@ 2024-02-10 2:15 pinskia at gcc dot gnu.org
2024-02-10 3:41 ` [Bug target/113859] " pinskia at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-02-10 2:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113859
Bug ID: 113859
Summary: popcount HI can be vectorized for non-SVE
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Target Milestone: ---
Target: aarch64
Take:
```
void f(unsigned short * __restrict b, unsigned short * __restrict d)
{
for(int i = 0; i < 1024; i++)
d[i] = __builtin_popcount(b[i]);
}
```
This can be vectorized to:
```
ldr q0, [x9]
cnt v0.16b, v0.16b
uaddlp v0.8h, v0.16b
stp q0, [x9]
```
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/113859] popcount HI can be vectorized for non-SVE
2024-02-10 2:15 [Bug target/113859] New: popcount HI can be vectorized for non-SVE pinskia at gcc dot gnu.org
@ 2024-02-10 3:41 ` pinskia at gcc dot gnu.org
2024-03-05 0:58 ` pinskia at gcc dot gnu.org
2024-05-09 18:05 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-02-10 3:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113859
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
SI (and DI) can be optimized too.
LLVM is produces for int:
ldr d0, [x0]
cnt v0.8b, v0.8b
uaddlp v0.4h, v0.8b
uaddlp v0.2s, v0.4h
str d0, [x1]
ret
And for long:
```
ldr q0, [x0]
cnt v0.16b, v0.16b
uaddlp v0.8h, v0.16b
uaddlp v0.4s, v0.8h
uaddlp v0.2d, v0.4s
str q0, [x1]
ret
```
That is for SLP version:
```
void f(unsigned long * __restrict b, unsigned long * __restrict d)
{
d[0] = __builtin_popcountll(b[0]);
d[1] = __builtin_popcountll(b[1]);
}
```
s/long/int/ in the first case.
Note using SVE is better than the above if it is available and that is part of
PR 113860 though.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/113859] popcount HI can be vectorized for non-SVE
2024-02-10 2:15 [Bug target/113859] New: popcount HI can be vectorized for non-SVE pinskia at gcc dot gnu.org
2024-02-10 3:41 ` [Bug target/113859] " pinskia at gcc dot gnu.org
@ 2024-03-05 0:58 ` pinskia at gcc dot gnu.org
2024-05-09 18:05 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-03-05 0:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113859
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Ever confirmed|0 |1
Assignee|unassigned at gcc dot gnu.org |pinskia at gcc dot gnu.org
Last reconfirmed| |2024-03-05
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Mine.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/113859] popcount HI can be vectorized for non-SVE
2024-02-10 2:15 [Bug target/113859] New: popcount HI can be vectorized for non-SVE pinskia at gcc dot gnu.org
2024-02-10 3:41 ` [Bug target/113859] " pinskia at gcc dot gnu.org
2024-03-05 0:58 ` pinskia at gcc dot gnu.org
@ 2024-05-09 18:05 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-05-09 18:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113859
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
URL| |https://gcc.gnu.org/piperma
| |il/gcc-patches/2024-May/650
| |311.html
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Patch was posted:
https://gcc.gnu.org/pipermail/gcc-patches/2024-May/650311.html
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-05-09 18:05 UTC | newest]
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2024-02-10 2:15 [Bug target/113859] New: popcount HI can be vectorized for non-SVE pinskia at gcc dot gnu.org
2024-02-10 3:41 ` [Bug target/113859] " pinskia at gcc dot gnu.org
2024-03-05 0:58 ` pinskia at gcc dot gnu.org
2024-05-09 18:05 ` pinskia at gcc dot gnu.org
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