[llvm] [mlir] [mlir][OpenMP] Add __atomic_store to AtomicInfo (PR #121055)

[Tom Eccles via llvm-commits]

tblah wrote:

> Hi @tblah
> Do you think this could be an acceptable way of going about this? One upside I see is that we no longer need to do the implicit cast during building LLVM IR, about which Michael also had reservations.

Thanks for the update.

This looks good to me. We might need casts for other kinds of atomic operations too.

https://github.com/llvm/llvm-project/pull/121055