On Wed, Feb 26, 2020 at 11:43:10AM +0000, Richard Sandiford wrote:
> In this PR we had a conversion between two integer vectors that
> both had scalar integer modes. We then tried to implement the
> conversion using the scalar optab for those modes, instead of
> doing the conversion elementwise.
>
> I wondered about letting through scalar modes for single-element
> vectors, but I don't have any evidence that that's useful/necessary,
> so it seemed better to keep things simple.
>
> Tested on aarch64-linux-gnu, armeb-eabi and x86_64-linux-gnu.
Won't this prevent even say __v4qi to __v4uqi and similar conversions
with scalar modes for those where we don't need any kind of extensions,
just reinterpret the bits?
Jakub
