[llvm] [LoopSafetyInfo] Compute block colors lazily (NFC) (PR #221954)

[Eli Friedman via llvm-commits]

https://github.com/efriedma-quic commented:

If this continues to be an issue, we could write code to color a loop without coloring the whole function.  It's basically the same algorithm as colorEHFunclets(), just starting from the loop header instead of the function entry block, and ignoring any exit blocks.

https://github.com/llvm/llvm-project/pull/221954