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

[Pankaj Dwivedi via llvm-commits]

PankajDwivedi-25 wrote:

Probably AMDGPUInstCombineIntrinsics would be the place? where we handle general intrinsic-based optimization. or where we do general instCombine optimization, not specific to intrinsics(because it's mostly related to assume)?


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