[llvm] [CodeGen][NewPM] Port RegAllocEvictionAdvisor analysis to NPM (PR #117309)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

Thanks. This really helps!

FWIW, it'd help if the RFC was updated to clarify these things (like 1 sentence like above brings a lot of clarity!), and if it were linked in these patches. I really like that we're moving off LPM, my concerns were the ones that got addressed above (i.e. progression/evolution of design). I should be able to review today.

Thanks!

https://github.com/llvm/llvm-project/pull/117309