From 9480d1e941db531242562bac5bfd2cc370c2b755 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=EB=B0=95=EC=84=B8=ED=9D=AC/On-Device=20Lab=28SR=29/Princip?=
 =?utf8?q?al=20Engineer/=EC=82=BC=EC=84=B1=EC=A0=84=EC=9E=90?=
 <saehie.park@samsung.com>
Date: Tue, 13 Aug 2019 08:42:58 +0900
Subject: [PATCH] [moco-tf] Introduce VariadicArityNode (#6472)

This will introduce TF dialect VariadicArityNode to manage Concat node

Signed-off-by: SaeHie Park <saehie.park@samsung.com>
---
 compiler/moco-tf/src/Dialect/VariadicArityNode.h   | 80 ++++++++++++++++++++++
 .../moco-tf/src/Dialect/VariadicArityNode.test.cpp | 55 +++++++++++++++
 2 files changed, 135 insertions(+)
 create mode 100644 compiler/moco-tf/src/Dialect/VariadicArityNode.h
 create mode 100644 compiler/moco-tf/src/Dialect/VariadicArityNode.test.cpp

diff --git a/compiler/moco-tf/src/Dialect/VariadicArityNode.h b/compiler/moco-tf/src/Dialect/VariadicArityNode.h
new file mode 100644
index 0000000..407b831
--- /dev/null
+++ b/compiler/moco-tf/src/Dialect/VariadicArityNode.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2019 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 __TF_DIALECT_VARIADIC_ARITY_NODE_H__
+#define __TF_DIALECT_VARIADIC_ARITY_NODE_H__
+
+#include <loco/IR/Node.h>
+#include <loco/IR/Use.h>
+
+#include <vector>
+#include <memory>
+#include <cassert>
+
+namespace moco
+{
+namespace tf
+{
+
+/**
+ * @brief Nodes with the variadic inputs
+ */
+template <typename Base> class VariadicArityNode : public Base
+{
+public:
+  VariadicArityNode(uint32_t arity)
+  {
+    for (uint32_t n = 0; n < arity; ++n)
+    {
+      _args.emplace_back(std::move(std::unique_ptr<loco::Use>{new loco::Use{this}}));
+    }
+  };
+
+  virtual ~VariadicArityNode() = default;
+
+public:
+  uint32_t arity(void) const final { return _args.size(); }
+
+  loco::Node *arg(uint32_t n) const final
+  {
+    assert(n < _args.size());
+    return _args.at(n)->node();
+  }
+
+  void drop(void) final
+  {
+    for (uint32_t n = 0; n < _args.size(); ++n)
+    {
+      _args.at(n)->node(nullptr);
+    }
+  }
+
+protected:
+  // This API allows inherited classes to access "_args" field.
+  loco::Use *at(uint32_t n) const
+  {
+    assert(n < _args.size());
+    return _args.at(n).get();
+  }
+
+private:
+  std::vector<std::unique_ptr<loco::Use>> _args;
+};
+
+} // namespace tf
+} // namespace moco
+
+#endif // __TF_DIALECT_VARIADIC_ARITY_NODE_H__
diff --git a/compiler/moco-tf/src/Dialect/VariadicArityNode.test.cpp b/compiler/moco-tf/src/Dialect/VariadicArityNode.test.cpp
new file mode 100644
index 0000000..0b2d879
--- /dev/null
+++ b/compiler/moco-tf/src/Dialect/VariadicArityNode.test.cpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2019 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.
+ */
+
+#include "VariadicArityNode.h"
+
+#include <loco/IR/Nodes.h>
+
+#include <gtest/gtest.h>
+
+namespace
+{
+
+using namespace moco::tf;
+
+class ArbitraryInputNode : public VariadicArityNode<loco::Node>
+{
+public:
+  ArbitraryInputNode(uint32_t arity) : VariadicArityNode<loco::Node>(arity) {}
+
+  void input(uint32_t idx, loco::Node *node) { at(idx)->node(node); }
+  loco::Node *input(uint32_t idx) const { return at(idx)->node(); }
+
+  const loco::Dialect *dialect(void) const { return nullptr; } // this won't be called for testing
+  uint32_t opnum(void) const { return -1; }                    // this won't be called for testing
+};
+
+} // namespace
+
+TEST(CustomOpTest, VariadicArityNode_arity_n)
+{
+  loco::ConstGen cg0, cg1, cg2;
+
+  ArbitraryInputNode a_node(3);
+  a_node.input(0, &cg0);
+  a_node.input(1, &cg1);
+  a_node.input(2, &cg2);
+
+  ASSERT_EQ(a_node.arity(), 3);
+  ASSERT_EQ(a_node.input(0), &cg0);
+  ASSERT_EQ(a_node.input(1), &cg1);
+  ASSERT_EQ(a_node.input(2), &cg2);
+}
-- 
2.7.4