[llvm] [Instsimplify] lshr&icmp adds support for the or instruction (PR #69445)

[via llvm-commits]

DianQK wrote:

> I think we are better off expressing this more generically.

Yeah, this should be a lot better. The test cases for this PR may be helpful. If you need.

https://github.com/llvm/llvm-project/pull/69445