SPECjbb2015 performance regressed after JDK-8225642 by about 5%.
            
- duplicates
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                    JDK-8230565 ZGC: Redesign C2 load barrier to expand on the MachNode level -           
- Closed
 
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        JDK-8230565
        ZGC: Redesign C2 load barrier to expand on the MachNode level
    
