[llvm] [SimplifyCFG] Convert switch to cmp/select sequence (PR #82795)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

The PR description says *what* this does without explaining *why*. This does not look look like a generally (or even commonly) profitable transform to me, so more context on what you're trying to achieve here would be helpful.

https://github.com/llvm/llvm-project/pull/82795