checkin stmt

include/tvm/base.h

@@ -37,13 +37,18 @@ enum DataType : int {
  * \note kOtherNodes could mean more than one node type.
  */
 enum NodeType {
+  // expr nodes
   kVarNode,
   kIntNode,
   kFloatNode,
   kUnaryOpNode,
   kBinaryOpNode,
   kReduceNode,
   kTensorReadNode,
+  // stmt nodes
+  kStoreNode,
+  kForRangeNode,
+  kIfThenElseNode,
   kOtherNodes
 };
 

include/tvm/stmt_node.h

@@ -0,0 +1,73 @@
+/*!
+ *  Copyright (c) 2016 by Contributors
+ * \file stmt.h
+ * \brief Common data structure for codegen
+ */
+#ifndef TVM_STMT_NODE_H_
+#define TVM_STMT_NODE_H_
+
+namespace tvm {
+
+struct StmtNode : public Node {
+};
+
+/*! \brief Store data into buffer */
+struct StoreNode : public StmtNode {
+  /*! \brief the variable representing the buffer */
+  Var buffer;
+  /*! \brief the buffer offset */
+  Expr offset;
+  /*! \brief The source expression*/
+  Expr src;
+  /*! \brief constructor */
+  StoreNode() {
+    node_type_ = kStoreNode;
+  }
+  void VisitNodeRefFields(FNodeRefVisit fvisit) override {
+    fvisit("buffer", &buffer);
+    fvisit("offset", &offset);
+    fvisit("src", &src);
+  }
+};
+
+/*! \brief for loop in range */
+struct ForRangeNode : public StmtNode {
+  /*! \brief loop variable */
+  Var loop_var;
+  /*! \brief The loop range */
+  Range range;
+  /*! \brief body of the loop */
+  Stmt body;
+  /*! \brief constructor */
+  ForRangeNode() {
+    node_type_ = kForRangeNode;
+  }
+  void VisitNodeRefFields(FNodeRefVisit fvisit) override {
+    fvisit("loop_var", &loop_var);
+    fvisit("range", &range);
+    fvisit("body", &body);
+  }
+};
+
+/*! \brief conditional expression */
+struct IfThenElseNode : public StmtNode {
+  /*! \brief The condition */
+  Expr cond;
+  /*! \brief The statement in then */
+  Stmt then_body;
+  /*! \brief The statement in else */
+  Stmt else_body;
+  /*! \brief constructor */
+  IfThenElseNode() {
+    node_type_ = kIfThenElseNode;
+  }
+  void VisitNodeRefFields(FNodeRefVisit fvisit) override {
+    fvisit("cond", &cond);
+    fvisit("then_body", &then_body);
+    fvisit("else_body", &else_body);
+  }
+};
+
+}  // namespace tvm
+
+#endif  // TVM_CODEGEN_H_