[llvm] [MachineLICM][AArch64] Hoist COPY instructions with other uses in the loop (PR #71403)

[David Sherwood via llvm-commits]

david-arm wrote:

> 
> Yeah, rebasing sounds like a good idea, I'll do that.

Hmm, the PR looks a little odd now! There is a single commit in the PR, that is itself a squashed commit.

https://github.com/llvm/llvm-project/pull/71403