[llvm] (Draft) [SimplifyIndVar] Push more users to worklist for simplifyUsers (PR #93598)

[via llvm-commits]

v01dXYZ wrote:

To answer your first question, it seems the Users are expected to be within the loop (test-suite fails with the assert `L->contains(ICI->getParent()) && "LCSSA form broken?"`).

My goal was to allow simplification of a IV comparison in an exit block.

https://github.com/llvm/llvm-project/pull/93598