*** old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.word/src/org/graalvm/compiler/word/WordOperationPlugin.java	Fri Jul  7 09:31:58 2017
--- new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.word/src/org/graalvm/compiler/word/WordOperationPlugin.java	Fri Jul  7 09:31:57 2017

*** 280,289 ****
--- 280,299 ----
              case COMPARISON:
                  assert args.length == 2;
                  b.push(returnKind, comparisonOp(b, operation.condition(), args[0], fromSigned(b, args[1])));
                  break;
  
+             case IS_NULL:
+                 assert args.length == 1;
+                 b.push(returnKind, comparisonOp(b, Condition.EQ, args[0], ConstantNode.forIntegerKind(wordKind, 0L)));
+                 break;
+ 
+             case IS_NON_NULL:
+                 assert args.length == 1;
+                 b.push(returnKind, comparisonOp(b, Condition.NE, args[0], ConstantNode.forIntegerKind(wordKind, 0L)));
+                 break;
+ 
              case NOT:
                  assert args.length == 1;
                  b.addPush(returnKind, new XorNode(args[0], b.add(forIntegerKind(wordKind, -1))));
                  break;