[llvm] [BOLT][AArch64] Handle OpNegateRAState to enable optimizing binaries with pac-ret hardening (PR #120064)

[Paschalis Mpeis via llvm-commits]

https://github.com/paschalis-mpeis commented:

Hey Gergely,

Thank you so much for your work!
I haven't finished reviewing as the patch is big, but I figured it might be helpful to share what I have so far.

Please have a look.

https://github.com/llvm/llvm-project/pull/120064