[llvm] [ConstraintElim] NE implies SLT if SLE and SGT if SGE (PR #127663)

[Nikita Popov via llvm-commits]

nikic wrote:

This has compile-time overhead: https://llvm-compile-time-tracker.com/compare.php?from=2cb5241c7724cbf4fa02b25547e098bfc635aba9&to=517f1757636ca8e5aa2c7f3f61e5b9672527886e&stat=instructions:u

https://github.com/llvm/llvm-project/pull/127663