To expedite merging from JDK,  JDK-8267151 was dropped.
Needs reexamination and reimplementation if necessary.
            
Needs reexamination and reimplementation if necessary.
- relates to
- 
                    JDK-8267151 C2: Don't create dummy Opaque1Node for outmost unswitched IfNode -           
- Resolved
 
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