[llvm] [InstCombine] Add assume-based optimizations for equality and AMDGPU ballot patterns (PR #160670)

[Teja Alaghari via llvm-commits]

TejaX-Alaghari wrote:

It wasn't my intention to disrespect any of the reviewer's time and expertise that helped to advice me in this PR. I sincerely apologize for my approach in relying much on AI. 

This has been a valuable experience for me. I'll re-work my implementation and get back.

https://github.com/llvm/llvm-project/pull/160670