[llvm] [GlobalISel] Combine (X == 0) & (Y == 0) -> (X | Y) == 0 (PR #71949)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> Nice tool. Seems like these are valid: https://alive2.llvm.org/ce/z/3AHtx3, https://alive2.llvm.org/ce/z/W8uR9j. With these changes the gains coming back and even improving the regression caused by the G_FREEZE introduction. But I think this might need a separate PR.


Yes, this should be done separately 



https://github.com/llvm/llvm-project/pull/71949