Summary: Add proper jtreg annotations in the preceding comment, including an explicit timeout.
Reviewed-by: kvn, twisti
Contributed-by: david.r.chase@oracle.com

Summary: In C2 add software membar after load from Reference.referent field to prevent commoning of loads across safepoint since GC can change its value. In C1 always generate Reference.get() intrinsic.
Reviewed-by: roland, twisti, dholmes, johnc