[llvm] [KnownBits] Improve minimum denominator bounds for sdiv (PR #227264)

[Jay Foad via llvm-commits]

jayfoad wrote:

> Generally a lit test showing a change in a transform is preferred to a unit test

For KnownBits I disagree, I think the unit tests are a much clearer and more direct way to test the core logic. But since you've already gone to the effort of writing the InstCombine tests I won't insist that you change back again.

> AI disclosure: No AI was used to generate or find the fix for this issue, including tests.

This is the first time I've seen a "no AI" disclosure!

https://github.com/llvm/llvm-project/pull/227264