[PATCH] Fix PR90332 by extending half size vector mode

[Segher Boessenkool]

On Wed, Mar 18, 2020 at 10:12:00PM +0800, Kewen.Lin wrote:
> > Btw, why not implement the neccessary vector init patterns?
> 
> Power doesn't support 64bit vector size, it looks a bit hacky and
> confusing to introduce this kind of mode just for some optab requirement,
> but I admit the optab hack can immediately make it work.  :)

But it opens up all kinds of other problems.  To begin with, how is a
short vector mapped to a "real" vector?

We don't have ops on short integer types, either, for similar reasons.


Segher