[llvm] Reapply [AA] Improve precision for monotonic atomic load/stor… (PR #195015)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

The code change looks good to me now, but it looks like your test changes got accidentally dropped? (IIRC previously atomic-todo.ll was integrated into atomic.ll and there were some extra tests.)

https://github.com/llvm/llvm-project/pull/195015