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

[Sjoerd Meijer via llvm-commits]

sjoerdmeijer wrote:

> Thanks for looking into this. Do you have benchmark results? This is quite a few extra pairs, and there is a chance it can cause less scheduling freedom.

This has been benchmarked, but I will repeat it for SPEC INT and FP just to double check.

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