Loop invariant code motion is an important compiler optimization and it moves invariant instructions out of a loop without affecting the semantics of a program.
For safety it ensures the alias dependencies before moving invariant out of loop.
In some cases memory aliasing may make this optimization ineffective. This results in possible missed opportunities in speeding up applications.
LoopVersioning LICM is a step to exploit those missed opportunities where memory aliasing may make LICM optimization ineffective.
