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

[Igor Kirillov via llvm-commits]

https://github.com/igogo-x86 approved this pull request.

LGTM, but give 24 hours for @fhahn to have a final word for my review approvals.

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