[llvm] [LAA] Perform checks for no-wrap separately from getPtrStride. (PR #126971)

[Michael Kruse via llvm-commits]

https://github.com/Meinersbur commented:

Effectively, `isNoWrap` now duplicates code from `getPtrStride`. Can that functionalty somehow refactored into a common function?

https://github.com/llvm/llvm-project/pull/126971