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diff --git a/compiler/enco/core/src/coex/IR.h b/compiler/enco/core/src/coex/IR.h
new file mode 100644
index 000000000..e81943f18
--- /dev/null
+++ b/compiler/enco/core/src/coex/IR.h
@@ -0,0 +1,109 @@
+/*
+ * 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_COEX_IR_H__
+#define __ENCO_COEX_IR_H__
+
+#include <coco/IR.h>
+
+/**
+ * @brief 2D Convolution through Andoird NN API
+ *
+ * TODO Support FusedActivation
+ */
+class ANNConv2D : public coco::Instr, public coco::Object::Producer, public coco::Object::Consumer
+{
+public:
+  ANNConv2D() : _ofm{this}, _ifm{this}, _ker{this}, _bias{this}
+  {
+    // DO NOTHING
+  }
+
+public:
+  coco::Instr *loc(void) override { return this; }
+
+public:
+  coco::Object *ofm(void) const { return _ofm.value(); }
+  void ofm(coco::Object *o) { _ofm.value(o); }
+
+  coco::Object *ifm(void) const { return _ifm.value(); }
+  void ifm(coco::Object *o) { _ifm.value(o); }
+
+  coco::Object *ker(void) const { return _ker.value(); }
+  void ker(coco::Object *o) { _ker.value(o); }
+
+  /**
+   * Currently, this "bias" is a Feature object with channel-wise layout
+   *
+   * NOTE This design is subject to change
+   */
+  coco::Object *bias(void) const { return _bias.value(); }
+  void bias(coco::Object *o) { _bias.value(o); }
+
+public:
+  coco::Padding2D *pad(void) { return &_pad; }
+  const coco::Padding2D *pad(void) const { return &_pad; }
+
+  coco::Stride2D *stride(void) { return &_stride; }
+  const coco::Stride2D *stride(void) const { return &_stride; }
+
+private:
+  coco::Def _ofm;
+
+  coco::Use _ifm;
+  coco::Use _ker;
+  coco::Use _bias;
+
+private:
+  coco::Padding2D _pad;
+  coco::Stride2D _stride;
+};
+
+/**
+ * @brief Concatenate feature maps along "depth" dimension through Andoird NN API
+ */
+class ANNDepthConcatF : public coco::Instr,
+                        public coco::Object::Producer,
+                        public coco::Object::Consumer
+{
+public:
+  ANNDepthConcatF() : _out{this}, _fst{this}, _snd{this}
+  {
+    // DO NOTHING
+  }
+
+public:
+  coco::Instr *loc(void) override { return this; }
+
+public:
+  coco::Object *out(void) const { return _out.value(); }
+  void out(coco::Object *o) { _out.value(o); }
+
+  coco::Object *fst(void) const { return _fst.value(); }
+  void fst(coco::Object *o) { _fst.value(o); }
+
+  coco::Object *snd(void) const { return _snd.value(); }
+  void snd(coco::Object *o) { _snd.value(o); }
+
+private:
+  coco::Def _out;
+
+  // TODO Support variadic-length inputs
+  coco::Use _fst;
+  coco::Use _snd;
+};
+
+#endif // __ENCO_COEX_IR_H__