[llvm] [InstCombine] Infer nsw/nuw for trunc (PR #87910)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

Compile-time impact: https://llvm-compile-time-tracker.com/compare.php?from=869797daca38941e0af3bcd8ae5300bcebf7b1a9&to=f4c5ea82ac929ba2283559d5970612977fe6845b&stat=instructions:u



https://github.com/llvm/llvm-project/pull/87910