[llvm] [TailDuplicator] Add maximum predecessors and successors to consider tail duplicating blocks (PR #78582)

[Quentin Dian via llvm-commits]

DianQK wrote:

Ping. If the new changes are suitable, I hope to catch up on the final release of 18.1.0.

https://github.com/llvm/llvm-project/pull/78582