--- old/src/hotspot/share/utilities/globalDefinitions.hpp	2018-05-07 15:52:11.548507519 +0200
+++ new/src/hotspot/share/utilities/globalDefinitions.hpp	2018-05-07 15:52:11.236502230 +0200
@@ -451,6 +451,7 @@
 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.