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diff --git a/compiler/enco/core/src/Transforms/FreeOpElimination.h b/compiler/enco/core/src/Transforms/FreeOpElimination.h
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+++ b/compiler/enco/core/src/Transforms/FreeOpElimination.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 __ENCO_TRANSFORM_FREE_OP_ELIMINATION_H__
+#define __ENCO_TRANSFORM_FREE_OP_ELIMINATION_H__
+
+#include "Code.h"
+#include "Pass.h"
+
+namespace enco
+{
+
+/**
+ * @brief Eliminate free op
+ *
+ * An op is referred to as "free" if it is not bound to any "instruction"
+ */
+void eliminate_free_op(coco::Module *mod);
+
+/**
+ * @brief Eliminate free op
+ */
+static inline void eliminate_free_op(enco::Code *code)
+{
+  // This function is just a wrapper of the above "void eliminate_free_op(coco::Module *mod)"
+  eliminate_free_op(code->module());
+}
+
+struct FreeOpEliminationPass final : public Pass
+{
+  PASS_CTOR(FreeOpEliminationPass)
+  {
+    // DO NOTHING
+  }
+
+  void run(const SessionID &sess) const override { eliminate_free_op(code(sess)); }
+};
+
+} // namespace enco
+
+#endif // __ENCO_TRANSFORM_FREE_OP_ELIMINATION_H__