[nest] Introduce 'Mul' expression node (#713)

This commit adds 'MulNode' class under nest::expr namespace to support
arithmetic multiplication in nest IR.

Signed-off-by: Jonghyun Park <jh1302.park@samsung.com>

diff --git a/contrib/nest/include/nest/expr/MulNode.h b/contrib/nest/include/nest/expr/MulNode.h
new file mode 100644 (file)
index 0000000..cf40c00
--- /dev/null
+++ b/contrib/nest/include/nest/expr/MulNode.h
@@ -0,0 +1,37 @@
+#ifndef __NEST_EXPR_MUL_NODE_H__
+#define __NEST_EXPR_MUL_NODE_H__
+
+#include "nest/expr/Node.h"
+
+#include <memory>
+
+namespace nest
+{
+namespace expr
+{
+
+class MulNode final : public Node
+{
+public:
+  MulNode(const std::shared_ptr<expr::Node> &lhs, const std::shared_ptr<expr::Node> &rhs)
+      : _lhs{lhs}, _rhs{rhs}
+  {
+    // DO NOTHING
+  }
+
+public:
+  const MulNode *asMul(void) const override { return this; }
+
+public:
+  const std::shared_ptr<expr::Node> &lhs(void) const { return _lhs; }
+  const std::shared_ptr<expr::Node> &rhs(void) const { return _rhs; }
+
+private:
+  std::shared_ptr<expr::Node> const _lhs;
+  std::shared_ptr<expr::Node> const _rhs;
+};
+
+} // namespace expr
+} // namespace nest
+
+#endif // __NEST_EXPR_MUL_NODE_H__

diff --git a/contrib/nest/include/nest/expr/Node.def b/contrib/nest/include/nest/expr/Node.def
index baf9aaa..0429517 100644 (file)
--- a/contrib/nest/include/nest/expr/Node.def
+++ b/contrib/nest/include/nest/expr/Node.def
@@ -6,3 +6,4 @@
 EXPR(Var)
 EXPR(Deref)
 EXPR(Add)
+EXPR(Mul)

diff --git a/contrib/nest/src/expr/MulNode.test.cpp b/contrib/nest/src/expr/MulNode.test.cpp
new file mode 100644 (file)
index 0000000..4c4f974
--- /dev/null
+++ b/contrib/nest/src/expr/MulNode.test.cpp
@@ -0,0 +1,27 @@
+#include "nest/expr/MulNode.h"
+
+#include <memory>
+
+#include <gtest/gtest.h>
+
+namespace
+{
+struct DummyNode final : public nest::expr::Node
+{
+};
+}
+
+TEST(MUL_NODE, cast)
+{
+  auto left = std::make_shared<DummyNode>();
+  auto right = std::make_shared<DummyNode>();
+
+  auto derived = std::make_shared<nest::expr::MulNode>(left, right);
+  std::shared_ptr<nest::expr::Node> base = derived;
+
+  ASSERT_NE(derived.get(), nullptr);
+  ASSERT_EQ(base->asMul(), derived.get());
+
+  ASSERT_EQ(derived->lhs().get(), left.get());
+  ASSERT_EQ(derived->rhs().get(), right.get());
+}