[llvm] [LAA] Prepare to handle diff type sizes (NFC) (PR #122318)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

@KennethHilmersson Thanks, your example seems to be quite similar to the one from @mikaelholmen -- the only difference is that the distance is {0, +, -1} instead of {0, +, -2}. The question is no longer about what causes the regression, but rather, if what we've done in this patch technically fixes the behavior.

https://github.com/llvm/llvm-project/pull/122318