82         if (value instanceof SubNode && base.valueNode() == value.getY()) {
  83             return -base.constantStride();
  84         }
  85         return base.constantStride();
  86     }
  87 
  88     @Override
  89     public ValueNode initNode() {
  90         return op(base.initNode(), offset);
  91     }
  92 
  93     @Override
  94     public ValueNode strideNode() {
  95         if (value instanceof SubNode && base.valueNode() == value.getY()) {
  96             return graph().addOrUniqueWithInputs(NegateNode.create(base.strideNode(), NodeView.DEFAULT));
  97         }
  98         return base.strideNode();
  99     }
 100 
 101     @Override
 102     public ValueNode extremumNode(boolean assumePositiveTripCount, Stamp stamp) {
 103         return op(base.extremumNode(assumePositiveTripCount, stamp), IntegerConvertNode.convert(offset, stamp, graph(), NodeView.DEFAULT));
 104     }
 105 
 106     @Override
 107     public ValueNode exitValueNode() {
 108         return op(base.exitValueNode(), offset);
 109     }
 110 
 111     @Override
 112     public boolean isConstantExtremum() {
 113         return offset.isConstant() && base.isConstantExtremum();
 114     }
 115 
 116     @Override
 117     public long constantExtremum() {
 118         return op(base.constantExtremum(), offset.asJavaConstant().asLong());
 119     }
 120 
 121     private long op(long b, long o) {
 122         if (value instanceof AddNode) {
 123             return b + o;

  82         if (value instanceof SubNode && base.valueNode() == value.getY()) {
  83             return -base.constantStride();
  84         }
  85         return base.constantStride();
  86     }
  87 
  88     @Override
  89     public ValueNode initNode() {
  90         return op(base.initNode(), offset);
  91     }
  92 
  93     @Override
  94     public ValueNode strideNode() {
  95         if (value instanceof SubNode && base.valueNode() == value.getY()) {
  96             return graph().addOrUniqueWithInputs(NegateNode.create(base.strideNode(), NodeView.DEFAULT));
  97         }
  98         return base.strideNode();
  99     }
 100 
 101     @Override
 102     public ValueNode extremumNode(boolean assumeLoopEntered, Stamp stamp) {
 103         return op(base.extremumNode(assumeLoopEntered, stamp), IntegerConvertNode.convert(offset, stamp, graph(), NodeView.DEFAULT));
 104     }
 105 
 106     @Override
 107     public ValueNode exitValueNode() {
 108         return op(base.exitValueNode(), offset);
 109     }
 110 
 111     @Override
 112     public boolean isConstantExtremum() {
 113         return offset.isConstant() && base.isConstantExtremum();
 114     }
 115 
 116     @Override
 117     public long constantExtremum() {
 118         return op(base.constantExtremum(), offset.asJavaConstant().asLong());
 119     }
 120 
 121     private long op(long b, long o) {
 122         if (value instanceof AddNode) {
 123             return b + o;