[llvm] [InstCombine] Swap out range metadata to range attribute for cttz/ctlz/ctpop (PR #88776)

[Nikita Popov via llvm-commits]

nikic wrote:

> will try to split out the poison handling, I tried to do that first but was not able come up with some test that miscompiled.

The test modified in cb6240d247b3419dea29eb99261171ea239b1c5c should work.

https://github.com/llvm/llvm-project/pull/88776