use addOrUniqueWithInputs, inputs may not be alive

Author: davleopo

compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/nodes/java/ArrayLengthNode.java

@@ -187,7 +187,7 @@ public void simplify(SimplifierTool tool) {
      */
     public static ValueNode maybeAddPositivePi(ValueNode length, FixedWithNextNode insertionPosition) {
         StructuredGraph graph = insertionPosition.graph();
-        ValueNode localLength = graph.addOrUnique(length);
+        ValueNode localLength = graph.addOrUniqueWithInputs(length);
         ValueNode replacement = localLength;
         if (!localLength.isConstant() && localLength.stamp(NodeView.DEFAULT).canBeImprovedWith(StampFactory.positiveInt())) {
             ValueAnchorNode g = graph.add(new ValueAnchorNode());