From dda12ef034f647c295ea044e517c849b6ad5d7d1 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=EB=B0=95=EC=A2=85=ED=98=84/On-Device=20Lab=28SR=29/Staff?=
 =?utf8?q?=20Engineer/=EC=82=BC=EC=84=B1=EC=A0=84=EC=9E=90?=
 <jh1302.park@samsung.com>
Date: Tue, 11 Jun 2019 16:19:20 +0900
Subject: [PATCH] [loco] Introduce CanonicalDialect singleton (#3729)

This commit introduces CanonicalDialect singleton which serves as an
in-memory unique identifier.

Signed-off-by: Jonghyun Park <jh1302.park@samsung.com>
---
 contrib/loco/include/loco/IR/CanonicalDialect.h | 45 +++++++++++++++++++++++++
 contrib/loco/src/IR/CanonicalDialect.cpp        | 28 +++++++++++++++
 contrib/loco/src/IR/CanonicalDialect.test.cpp   | 29 ++++++++++++++++
 3 files changed, 102 insertions(+)
 create mode 100644 contrib/loco/include/loco/IR/CanonicalDialect.h
 create mode 100644 contrib/loco/src/IR/CanonicalDialect.cpp
 create mode 100644 contrib/loco/src/IR/CanonicalDialect.test.cpp

diff --git a/contrib/loco/include/loco/IR/CanonicalDialect.h b/contrib/loco/include/loco/IR/CanonicalDialect.h
new file mode 100644
index 0000000..fad3caa
--- /dev/null
+++ b/contrib/loco/include/loco/IR/CanonicalDialect.h
@@ -0,0 +1,45 @@
+/*
+ * 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 __LOCO_IR_CANONICAL_DIALECT_H__
+#define __LOCO_IR_CANONICAL_DIALECT_H__
+
+#include "loco/IR/Dialect.h"
+
+namespace loco
+{
+
+/**
+ * @brief A singleton for Canonical Dialect
+ *
+ * CanonicalDialect serves as an in-memory unique identifier.
+ */
+class CanonicalDialect final : public Dialect
+{
+private:
+  CanonicalDialect() = default;
+
+public:
+  CanonicalDialect(const CanonicalDialect &) = delete;
+  CanonicalDialect(CanonicalDialect &&) = delete;
+
+public:
+  static Dialect *get(void);
+};
+
+} // namespace loco
+
+#endif // __LOCO_IR_CANONICAL_DIALECT_H__
diff --git a/contrib/loco/src/IR/CanonicalDialect.cpp b/contrib/loco/src/IR/CanonicalDialect.cpp
new file mode 100644
index 0000000..b46269d
--- /dev/null
+++ b/contrib/loco/src/IR/CanonicalDialect.cpp
@@ -0,0 +1,28 @@
+/*
+ * 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 "loco/IR/CanonicalDialect.h"
+
+namespace loco
+{
+
+Dialect *CanonicalDialect::get(void)
+{
+  static CanonicalDialect d;
+  return &d;
+}
+
+} // namespace loco
diff --git a/contrib/loco/src/IR/CanonicalDialect.test.cpp b/contrib/loco/src/IR/CanonicalDialect.test.cpp
new file mode 100644
index 0000000..96b4821
--- /dev/null
+++ b/contrib/loco/src/IR/CanonicalDialect.test.cpp
@@ -0,0 +1,29 @@
+/*
+ * 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 "loco/IR/CanonicalDialect.h"
+
+#include <gtest/gtest.h>
+
+TEST(CanonicalDialectTest, get)
+{
+  auto d = loco::CanonicalDialect::get();
+
+  // get() SHOULD return a valid(non-null) pointer
+  ASSERT_NE(d, nullptr);
+  // The return value SHOULD be stable across multiple invocations
+  ASSERT_EQ(d, loco::CanonicalDialect::get());
+}
-- 
2.7.4