[PATCH] D54291: [XRay] Add atomic fences around non-atomic reads and writes

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

What is the point of this change?  The atomic_fetch_add operations already use memory_order_acq_rel, so the explicit fences are redundant.


Repository:
  rL LLVM

https://reviews.llvm.org/D54291