[llvm] [BOLT][AArch64] Expand cmpbr when reversing would overflow (PR #202998)

[Paschalis Mpeis via llvm-commits]

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

Hey Alexandros,

Thanks for relanding this work.

Please have a look on a few comments below.

This touches the compact-code model outside of the introduced flag, including some minor refactoring, so it might be worth giving @maksfb a chance to take a look in case he has any comments.

https://github.com/llvm/llvm-project/pull/202998