--- old/src/hotspot/cpu/x86/gc/shared/barrierSetAssembler_x86.cpp	2018-06-05 18:17:14.236752454 +0200
+++ new/src/hotspot/cpu/x86/gc/shared/barrierSetAssembler_x86.cpp	2018-06-05 18:17:14.057755580 +0200
@@ -180,6 +180,9 @@
     assert(val == noreg, "only tos");
     __ store_double(dst);
     break;
+  case T_ADDRESS:
+    __ movptr(dst, val);
+    break;
   default: Unimplemented();
   }
 }