[llvm] [InstCombine] fold `(a == 1 && b != 0) || (a != 0 && b == 0))` to `(a ==0) != (b == 0)` (PR #94915)

[Zain Jaffal via llvm-commits]

zjaffal wrote:

I used isKnownInversion to check for both operands and added tests to check against a constant and to check for pointer compare

https://github.com/llvm/llvm-project/pull/94915