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.
