[llvm] [AArch64] Add invalid 1 x vscale costs for reductions and reduction-operations. (PR #102105)

[Sander de Smalen via llvm-commits]

sdesmalen-arm wrote:

> > The usual "fix" for this until it is supported
> 
> Do we see this being supported in the future? I thought it was an intrinsic limitation of SVE?

We do expect to support this in the future, but it requires some legalization work to handle these types properly.

https://github.com/llvm/llvm-project/pull/102105