Part of the gc api used for arraycopy needs tweaking to cover shenandoah.
            
- relates to
- 
                    JDK-8211776 8210887 broke arraycopy optimization when ZGC is enabled -           
- Resolved
 
-         
            
        
        JDK-8211776
        8210887 broke arraycopy optimization when ZGC is enabled
    
