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diff --git a/compiler/enco/core/src/ANN/IR/Operand.h b/compiler/enco/core/src/ANN/IR/Operand.h
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+++ b/compiler/enco/core/src/ANN/IR/Operand.h
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+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __ANN_IR_OPERAND_H__
+#define __ANN_IR_OPERAND_H__
+
+#include "ANN/IR/DType.h"
+#include "ANN/IR/Weight.h"
+
+#include <nncc/core/ADT/tensor/Shape.h>
+
+namespace ann
+{
+
+class Operand
+{
+public:
+  virtual ~Operand() = default;
+
+public:
+  DType dtype(void) const { return _dtype; }
+  void dtype(const DType &dtype) { _dtype = dtype; }
+
+  const Weight *weight(void) const { return _weight; }
+  void weight(const Weight *weight) { _weight = weight; }
+
+private:
+  DType _dtype = DType::UNK;
+  const Weight *_weight = nullptr;
+};
+
+} // namespace ann
+
+namespace ann
+{
+
+/**
+ * @brief Plain (non-qunatized) Scalar Operand
+ */
+struct ScalarOperand final : public Operand
+{
+};
+
+} // namespace ann
+
+namespace ann
+{
+
+/**
+ * @brief Plain (non-qunatized) Tensor Operand
+ */
+struct TensorOperand final : public Operand
+{
+public:
+  TensorOperand(const nncc::core::ADT::tensor::Shape &shape) : _shape{shape}
+  {
+    // DO NOTHING
+  }
+
+public:
+  const nncc::core::ADT::tensor::Shape &shape(void) const { return _shape; }
+
+private:
+  nncc::core::ADT::tensor::Shape _shape;
+};
+
+} // namespace ann
+
+#endif // __ANN_IR_OPERAND_H__