1 files changed, 116 insertions, 0 deletions
diff --git a/compiler/coco/core/src/IR/Object.cpp b/compiler/coco/core/src/IR/Object.cpp
new file mode 100644
index 000000000..6a51a61a3
--- /dev/null
+++ b/compiler/coco/core/src/IR/Object.cpp
@@ -0,0 +1,116 @@
+/*
+ * 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.
+ */
+
+#include "coco/IR/Object.h"
+#include "coco/IR/Def.h"
+#include "coco/IR/Use.h"
+
+#include <cassert>
+#include <stdexcept>
+
+namespace coco
+{
+
+Object::Object()
+{
+  // Register self to Dep
+  _dep.object(this);
+}
+
+Def *Object::def(void) const { return _def; }
+
+void Object::def(Def *d)
+{
+  // This assert enforces users to explicitly reset def before update.
+  //
+  // Let's consider an object o with def d0.
+  //
+  // The following code is allowed:
+  // o->def(nullptr);
+  // o->def(d1);
+  //
+  // However, the following code is not allowed:
+  // o->def(d1);
+  //
+  assert((_def == nullptr) || (d == nullptr));
+  _def = d;
+}
+
+const UseSet *Object::uses(void) const { return &_uses; }
+UseSet *Object::mutable_uses(void) { return &_uses; }
+
+Object::Producer *producer(const Object *obj)
+{
+  if (auto d = obj->def())
+  {
+    return d->producer();
+  }
+
+  return nullptr;
+}
+
+Object::ConsumerSet consumers(const Object *obj)
+{
+  Object::ConsumerSet res;
+
+  for (const auto &use : *(obj->uses()))
+  {
+    if (auto consumer = use->consumer())
+    {
+      res.insert(consumer);
+    }
+  }
+
+  return res;
+}
+
+/**
+ * Casting Helpers
+ *
+ * TODO Use Macro to reduce code duplication
+ */
+template <> bool isa<FeatureObject>(const Object *o) { return o->asFeature() != nullptr; }
+template <> bool isa<KernelObject>(const Object *o) { return o->asKernel() != nullptr; }
+
+template <> FeatureObject *cast(Object *o)
+{
+  assert(o != nullptr);
+  auto res = o->asFeature();
+  assert(res != nullptr);
+  return res;
+}
+
+template <> KernelObject *cast(Object *o)
+{
+  assert(o != nullptr);
+  auto res = o->asKernel();
+  assert(res != nullptr);
+  return res;
+}
+
+template <> FeatureObject *safe_cast(Object *o)
+{
+  // NOTE o may be nullptr
+  return (o == nullptr) ? nullptr : o->asFeature();
+}
+
+template <> KernelObject *safe_cast(Object *o)
+{
+  // NOTE o may be nullptr
+  return (o == nullptr) ? nullptr : o->asKernel();
+}
+
+} // namespace coco