[llvm] [AArch64] optimize manual addp (PR #181549)

[David Green via llvm-commits]

https://github.com/davemgreen approved this pull request.

Thanks. Sounds great. LGTM

IIRC, there were some FADDP patterns similarly added too, which might be in the same boat.

https://github.com/llvm/llvm-project/pull/181549