[llvm] [AArch64] Ensure we transferImpOps on BSP pseudo expansions. (PR #149456)

[Ricardo Jesus via llvm-commits]

rj-jesus wrote:

I see, thanks very much for the explanation. I was mainly concerned about the `renamable $q17 = BSPv16i8 (...)` just before the store (I was worried `q17` could hypothetically get clobbered after the store, before reaching the later BSPs and moves). If that's not a concern, then all good. Thanks again. :)

https://github.com/llvm/llvm-project/pull/149456