[llvm] [InstCombine] Fold (x + y) & (2^C) -> x & 2^C when y % 2^(C+1) == 0 (PR #166935)

[Shamshura Egor via llvm-commits]

egorshamshura wrote:

Hi! My uni days had started, so I needed to focus on my studies. Now I'm back and I wanted to ask, could you please take a look at my PR? I think I fixed your comments. @dtcxzyw

https://github.com/llvm/llvm-project/pull/166935