@Override
 public void lower(LoweringTool tool) {
   if (graph().getGuardsStage().areFrameStatesAtDeopts()) {
     ForeignCallDescriptor desc =
         HotSpotHostForeignCallsProvider.lookupCheckcastArraycopyDescriptor(isUninit());
     StructuredGraph graph = graph();
     ValueNode srcAddr = computeBase(getSource(), getSourcePosition());
     ValueNode destAddr = computeBase(getDestination(), getDestinationPosition());
     ValueNode len = getLength();
     if (len.stamp().getStackKind() != runtime.getTarget().wordJavaKind) {
       len =
           IntegerConvertNode.convert(
               len, StampFactory.forKind(runtime.getTarget().wordJavaKind), graph());
     }
     ForeignCallNode call =
         graph.add(
             new ForeignCallNode(
                 runtime.getHostBackend().getForeignCalls(),
                 desc,
                 srcAddr,
                 destAddr,
                 len,
                 superCheckOffset,
                 destElemKlass));
     call.setStateAfter(stateAfter());
     graph.replaceFixedWithFixed(this, call);
   }
 }
 @Override
 public ValueNode extremumNode(boolean assumePositiveTripCount, Stamp stamp) {
   return op(
       base.extremumNode(assumePositiveTripCount, stamp),
       IntegerConvertNode.convert(offset, stamp, graph()));
 }