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

[Manos Anagnostakis via llvm-commits]

manosanaggh wrote:

> Thanks for moving this over. It looks sensible to me.

Thank you too for the tips! I am wondering if these x64 regressions in the checks are a thing or false positives, but I am going to have a real quick test tomorrow in a x64 machine.

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