On Tue, Aug 3, 2021 at 2:09 PM Richard Sandiford via Gcc-patches
wrote:
>
> When the vectoriser scalarises a strided store, it counts one
> scalar_store for each element plus one vec_to_scalar extraction
> for each element. However, extracting element 0 is free on AArch64,
> so it should have zer
When the vectoriser scalarises a strided store, it counts one
scalar_store for each element plus one vec_to_scalar extraction
for each element. However, extracting element 0 is free on AArch64,
so it should have zero cost.
I don't have a testcase that requires this for existing -mtune
options, bu
