[llvm] [InstCombine] Fold icmp of trunc nuw/nsw (PR #90436)

[Nikita Popov via llvm-commits]

nikic wrote:

> > instead of computeKnownBits().
> 
> Does it improve the compile-time?

I don't see any significant compile-time change: https://llvm-compile-time-tracker.com/compare.php?from=e1622e189e8c0ef457bfac528f90a7a930d9aad2&to=b48d51be8e5956645d323123550638ba911eef69&stat=instructions:u

https://github.com/llvm/llvm-project/pull/90436