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

[Tobias Hieta via llvm-branch-commits]

tru wrote:

Thanks for flagging this, @arsenm. Agreed this is out of scope for the current phase (post-Final 23.1.1 point release — only regressions and critical bug fixes are accepted, and this is a compile-time-only improvement, not a correctness fix). Marking this Won't Merge for the `release/23.x` branch; happy to revisit if a regression or correctness angle turns up.

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