src/share/vm/gc_implementation/g1/g1OopClosures.hpp

rev 7471 : 8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
Summary: Evaluate and improve object copy time by micro-optimizations and splitting out slow and fast paths aggressively.
Reviewed-by:
Contributed-by: Tony Printezis <tprintezis@twitter.com>, Thomas Schatzl <thomas.schatzl@oracle.com>

*** 24,33 ****
--- 24,34 ----
  
  #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP
  #define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP
  
  #include "memory/iterator.hpp"
+ #include "oops/markOop.hpp"
  
  class HeapRegion;
  class G1CollectedHeap;
  class G1RemSet;
  class ConcurrentMark;
*** 254,264 ****
      assert(from != NULL, "from region must be non-NULL");
      _from = from;
    }
  
    bool self_forwarded(oop obj) {
!     bool result = (obj->is_forwarded() && (obj->forwardee()== obj));
      return result;
    }
  
    bool apply_to_weak_ref_discovered_field() { return true; }
  
--- 255,266 ----
      assert(from != NULL, "from region must be non-NULL");
      _from = from;
    }
  
    bool self_forwarded(oop obj) {
!     markOop m = obj->mark();
!     bool result = (m->is_marked() && ((oop)m->decode_pointer() == obj));
      return result;
    }
  
    bool apply_to_weak_ref_discovered_field() { return true; }