[llvm] [InstCombine] Fold `(icmp pred (trunc nuw/nsw X), C)` -> `(icmp pred X, (zext/sext C))` (PR #87935)

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

This patch causing false MSAN reports.
It's likely a bug in MSAN, but I didn't figured out the fix yet.

Would it be OK to revert the patch while I am investigating, to avoid false reports for us and other MSAN users?  

https://github.com/llvm/llvm-project/pull/87935