[llvm] [AArch64] MI Scheduler LDP/STP combine follow up (PR #79003)

[Sjoerd Meijer via llvm-commits]

sjoerdmeijer wrote:

I have benchmarked SPEC INT and FP on the V2 and the N1, and performance is flat.

I don't have access to in-order cores, but SPEC looks good on bigger ones.

https://github.com/llvm/llvm-project/pull/79003