[llvm] [AArch64] New subtarget features to control ldp and stp formation, fo… (PR #66098)

[Manos Anagnostakis via llvm-commits]

manosanaggh wrote:

This is a new version, which was requested here: https://reviews.llvm.org/D159480

https://github.com/llvm/llvm-project/pull/66098