[llvm] [AArch64] Fold COPY(y:gpr, DUP(x:fpr, i)) -> UMOV(y:gpr, x:fpr, i) (PR #89017)

[Dhruv Chawla via llvm-commits]

dc03-work wrote:

> Hello. Does this come up on in selection-dag anywhere? If not I think I would expect it to be optimized during GISel.

No, this does not come up with SDAG. However, I could not really find any other pass where this would fit in better.

https://github.com/llvm/llvm-project/pull/89017