[llvm] [LAA] Prepare to handle diff type sizes v2 (NFC) (PR #161238)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon commented:

Kindly look at the entire change of this PR, and not individual commits? Should be quite straightforward, I think?

https://github.com/llvm/llvm-project/pull/161238