Unify ways to move code or check if code is safe to be moved

LLVM transformation passes use code motion in different types of transformations. All these passes have some embedded code motion safety checks and mechanisms to move code. This project aims to identify different mechanisms for checking code motion safety and for moving code and then tries to unify them into one place. This will eventually provide a standardized way for different transformation passes to use code motion checks and to move code. The initial groundwork has already started in CodeMoverUtils. This project will focus on the code motion safety checks and the ways to move code in different loop passes, keeping CodeMoverUtils independent of any loop information. This will help to increase the maintainability of code motion safety checks and will reduce the redundancy and inconsistency of code motion safety checks and ways to move code.