[llvm-branch-commits] [llvm] release/23.x: [RegisterCoalescer] Avoid retrying high-cost joins for live intervals (#207976) (PR #221331)

[Matt Arsenault via llvm-branch-commits]

arsenm wrote:

I think this is on the risky side for a release branch, particularly given it's only a compile time and not a correctness fix 

https://github.com/llvm/llvm-project/pull/221331