This patch improves GCC’s vectorization of __builtin_popcount for aarch64 target
by adding popcount patterns for vector modes besides QImode, i.e., HImode,
SImode and DImode.
With this patch, we now generate the following for V8HI:
cnt v1.16b, v0.16b
uaddlp v2.8h, v1.16b
For V4HI, we gen
Pengxuan Zheng writes:
> This patch improves GCC’s vectorization of __builtin_popcount for aarch64
> target
> by adding popcount patterns for vector modes besides QImode, i.e., HImode,
> SImode and DImode.
>
> With this patch, we now generate the following for V8HI:
> cnt v1.16b, v0.16b
>
> Pengxuan Zheng writes:
> > This patch improves GCC’s vectorization of __builtin_popcount for
> > aarch64 target by adding popcount patterns for vector modes besides
> > QImode, i.e., HImode, SImode and DImode.
> >
> > With this patch, we now generate the following for V8HI:
> > cnt v1.16b,
