[llvm] [InstCombine] Fold trunc nuw i1 to false when dominated by icmp. (PR #151961)

[Nikita Popov via llvm-commits]

nikic wrote:

@andjo403 It's possible that https://github.com/llvm/llvm-project/pull/153003 may help for the remaining cases.

https://github.com/llvm/llvm-project/pull/151961