[libclc] [AMDGPU][MachineScheduler] Alternative way to control excess RP. (PR #68004)

[Jeffrey Byrnes via cfe-commits]

https://github.com/jrbyrnes commented:

Just have a few questions about implementation details -- at a higher level, seems like we are trading one heuristic for another w.r.t flagging regions as ExcessRP -- so I'm curious about the relative performance.

https://github.com/llvm/llvm-project/pull/68004