[llvm] [LAA] refactor program logic (NFC) (PR #92101)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

> In the future, it would be good to avoid force pushes and use merge commits instead of rebases to update the PR, as Github deals with merges much better than with force pushes & rebases in terms of retaining comments

I must admit that I'm a little nervous about using merge commits, since `main` requires linear history, and I'm worried that I might mess something up. Besides, I like to view my branch history locally before submitting, and intervening merge commits make it complicated to do so.

https://github.com/llvm/llvm-project/pull/92101