[PATCH, PowerPC] ABI fixes / improvements for powerpc64-linux

[Ulrich Weigand]

Hal Finkel <hfinkel at anl.gov> wrote on 09.07.2014 21:19:56:

> > My code treats those as "non-Altivec" and passes in GPRs.  But
> > I guess we can instead treat them as <4 x float> Altivec and pass
> > in vector registers.
>
> I think this makes sense, because the backend will widen <3 x float>
> into a <4 x float> anyway.
[snip]
> > I actually have a <6 x short> test already in.  I've now added a
> > <3 x short> test as well.
>
> Thanks!

Patch to support non-Altivec vectors now checked in as
revision 212734.

Thanks,
Ulrich