When dealing with source vectors, we can use the vector length
rather than using a smaller size and zero extending the register,
especially since the resulting value is just inserted into another
vector.
For a bunch of cases that act as broadcasts (where all
indices in the imm8 specify the same element), we
can use VDupElement here rather than iterating through.
While it would be bizarre if this actually occurred frequently
in practice, we can still tune it so there's no subpar assembly
output in the cases it actually does happen.
It is not an external component, and it makes paths needlessly long.
Ryan seemed amenable to this when we discussed on IRC earlier.
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Lioncache