Need fast loadUnsafe() function in AtomicWord

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      mfence adds a lot of overhead and isn't needed in some cases. Example use case:

      AtomicInt32 _referenceCount;
bool isShared() const { return _referenceCount.loadUnsafe() > 1; }

              Assignee:
              Alberto Lerner (Inactive)
              Reporter:
              Mathias Stearn
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                Created:
                Updated:
                Resolved: