src/hotspot/share/utilities/globalDefinitions.hpp

*** 449,458 ****
--- 449,459 ----
  
  const int LogKlassAlignmentInBytes = 3;
  const int LogKlassAlignment        = LogKlassAlignmentInBytes - LogHeapWordSize;
  const int KlassAlignmentInBytes    = 1 << LogKlassAlignmentInBytes;
  const int KlassAlignment           = KlassAlignmentInBytes / HeapWordSize;
+ const int KlassPtrValueTypeMask    = (1 << (LogKlassAlignmentInBytes + 1)) - 1;
  
  // Maximal size of heap where unscaled compression can be used. Also upper bound
  // for heap placement: 4GB.
  const  uint64_t UnscaledOopHeapMax = (uint64_t(max_juint) + 1);
  // Maximal size of heap where compressed oops can be used. Also upper bound for heap