Implement Unsafe opaque and acquire/release put and get methods #20475
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Signed-off-by: Spencer Comin <spencer.comin@ibm.com>
Add opaque and acquire/release flavours of get put methods in Unsafe as recognized methods, and generate unsafe shadow symbols with the correct access modes when inlining these methods. Signed-off-by: Spencer Comin <spencer.comin@ibm.com>
Since Unsafe.putOrdered is fully supported through acquire/release symbols, we no longer need to duplicate the call tree to prevent incorrect optimizations. Signed-off-by: Spencer Comin <spencer.comin@ibm.com>
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Implement the Unsafe get and put methods with opaque and acquire/release memory semantics by using the corresponding access modes on the unsafe shadow symbols as introduced in eclipse-omr/omr#7517.
Note that this requires a coordinated merge with eclipse-omr/omr#7517.