[llvm] Experimental patch for understanding the pre-RA MachineScheduler (PR #136483)

[Jonas Paulsson via llvm-commits]

JonPsson1 wrote:

> Can you copy this to discource? It is the usual (and more convenient) place to discuss such things. https://discourse.llvm.org/

Thanks.
https://discourse.llvm.org/t/improving-pre-ra-machinescheduler/86028

https://github.com/llvm/llvm-project/pull/136483