[REFACTOR][API-Change] Migrate all Object construction to constructor.

docs/dev/codebase_walkthrough.rst

@@ -84,7 +84,7 @@ This function is mapped to the C++ function in ``include/tvm/schedule.h``.
 ::
 
    inline Schedule create_schedule(Array<Operation> ops) {
-     return ScheduleNode::make(ops);
+     return Schedule(ops);
    }
 
 ``Schedule`` consists of collections of ``Stage`` and output ``Operation``.

docs/dev/relay_add_pass.rst

@@ -138,7 +138,7 @@ is shown below.
       if (g->tuple == t) {
         return GetRef<Expr>(g);
       } else {
-        return TupleGetItemNode::make(t, g->index);
+        return TupleGetItem(t, g->index);
       }
     }
 

docs/dev/relay_pass_infra.rst

@@ -344,13 +344,13 @@ registration.
 .. code:: c++
 
     // Create a simple Relay program.
-    auto tensor_type = relay::TensorTypeNode::make({}, tvm::Bool());
-    auto x = relay::VarNode::make("x", relay::Type());
-    auto f = relay::FunctionNode::make(tvm::Array<relay::Var>{ x }, x, relay::Type(), {});
+    auto tensor_type = relay::TensorType({}, tvm::Bool());
+    auto x = relay::Var("x", relay::Type());
+    auto f = relay::Function(tvm::Array<relay::Var>{ x }, x, relay::Type(), {});
 
-    auto y = relay::VarNode::make("y", tensor_type);
+    auto y = relay::Var("y", tensor_type);
     auto call = relay::Call(f, tvm::Array<relay::Expr>{ y });
-    auto fx = relay::FunctionNode::make(tvm::Array<relay::Var>{ y }, call, relay::Type(), {});
+    auto fx = relay::Function(tvm::Array<relay::Var>{ y }, call, relay::Type(), {});
 
     // Create a module for optimization.
     auto mod = IRModule::FromExpr(fx);

include/tvm/ir/span.h

@@ -97,14 +97,14 @@ class SpanNode : public Object {
            equal(col_offset, other->col_offset);
   }
 
-  TVM_DLL static Span make(SourceName source, int lineno, int col_offset);
-
   static constexpr const char* _type_key = "Span";
   TVM_DECLARE_FINAL_OBJECT_INFO(SpanNode, Object);
 };
 
 class Span : public ObjectRef {
  public:
+  TVM_DLL Span(SourceName source, int lineno, int col_offset);
+
   TVM_DEFINE_OBJECT_REF_METHODS(Span, ObjectRef, SpanNode);
 };
 

include/tvm/te/operation.h

@@ -177,12 +177,22 @@ class PlaceholderOpNode : public OperationNode {
     v->Visit("shape", &shape);
     v->Visit("dtype", &dtype);
   }
-  static Operation make(std::string name, Array<PrimExpr> shape, DataType dtype);
 
   static constexpr const char* _type_key = "PlaceholderOp";
   TVM_DECLARE_FINAL_OBJECT_INFO(PlaceholderOpNode, OperationNode);
 };
 
+/*!
+ * \brief Managed reference to PlaceholderOpNode
+ * \sa PlaceholderOpNode
+ */
+class PlaceholderOp : public Operation {
+ public:
+  TVM_DLL PlaceholderOp(std::string name, Array<PrimExpr> shape, DataType dtype);
+
+  TVM_DEFINE_OBJECT_REF_METHODS(PlaceholderOp, Operation, PlaceholderOpNode);
+};
+
 /*!
  * \brief A Compute op that compute a tensor on certain domain.
  * This is the base class for ComputeOp (operating on a scalar at a time) and
@@ -237,13 +247,23 @@ class TVM_DLL ComputeOpNode : public BaseComputeOpNode {
     v->Visit("reduce_axis", &reduce_axis);
     v->Visit("body", &body);
   }
-  static Operation make(std::string name, std::string tag, Map<String, ObjectRef> attrs,
-                        Array<IterVar> axis, Array<PrimExpr> body);
 
   static constexpr const char* _type_key = "ComputeOp";
   TVM_DECLARE_FINAL_OBJECT_INFO(ComputeOpNode, BaseComputeOpNode);
 };
 
+/*!
+ * \brief Managed reference to ComputeOpNode
+ * \sa ComputeOpNode
+ */
+class ComputeOp : public Operation {
+ public:
+  TVM_DLL ComputeOp(std::string name, std::string tag, Map<String, ObjectRef> attrs,
+                    Array<IterVar> axis, Array<PrimExpr> body);
+
+  TVM_DEFINE_OBJECT_REF_METHODS(ComputeOp, Operation, ComputeOpNode);
+};
+
 /*!
  * \brief A TenorCompute op that compute a tensor with an tensor intrinsic.
  */
@@ -285,15 +305,25 @@ class TensorComputeOpNode : public BaseComputeOpNode {
     v->Visit("input_regions", &input_regions);
     v->Visit("scalar_inputs", &scalar_inputs);
   }
-  static Operation make(std::string name, std::string tag, Array<IterVar> axis,
-                        Array<IterVar> reduce_axis, int schedulable_ndim, TensorIntrin intrin,
-                        Array<Tensor> tensors, Array<Region> regions,
-                        Array<PrimExpr> scalar_inputs);
 
   static constexpr const char* _type_key = "TensorComputeOp";
   TVM_DECLARE_FINAL_OBJECT_INFO(TensorComputeOpNode, BaseComputeOpNode);
 };
 
+/*!
+ * \brief Managed reference to TensorComputeOpNode
+ * \sa TensorComputeOpNode
+ */
+class TensorComputeOp : public Operation {
+ public:
+  TVM_DLL TensorComputeOp(std::string name, std::string tag, Array<IterVar> axis,
+                          Array<IterVar> reduce_axis, int schedulable_ndim, TensorIntrin intrin,
+                          Array<Tensor> tensors, Array<Region> regions,
+                          Array<PrimExpr> scalar_inputs);
+
+  TVM_DEFINE_OBJECT_REF_METHODS(TensorComputeOp, Operation, TensorComputeOpNode);
+};
+
 /*!
  * \brief Symbolic scan.
  */
@@ -353,14 +383,24 @@ class ScanOpNode : public OperationNode {
     v->Visit("inputs", &inputs);
     v->Visit("spatial_axis_", &spatial_axis_);
   }
-  static Operation make(std::string name, std::string tag, Map<String, ObjectRef> attrs,
-                        IterVar axis, Array<Tensor> init, Array<Tensor> update,
-                        Array<Tensor> state_placeholder, Array<Tensor> input);
 
   static constexpr const char* _type_key = "ScanOp";
   TVM_DECLARE_FINAL_OBJECT_INFO(ScanOpNode, OperationNode);
 };
 
+/*!
+ * \brief Managed reference to ScanOpNode
+ * \sa ScanOpNode
+ */
+class ScanOp : public Operation {
+ public:
+  TVM_DLL ScanOp(std::string name, std::string tag, Map<String, ObjectRef> attrs, IterVar axis,
+                 Array<Tensor> init, Array<Tensor> update, Array<Tensor> state_placeholder,
+                 Array<Tensor> input);
+
+  TVM_DEFINE_OBJECT_REF_METHODS(ScanOp, Operation, ScanOpNode);
+};
+
 /*!
  * \brief External computation that cannot be splitted.
  */
@@ -404,14 +444,24 @@ class ExternOpNode : public OperationNode {
     v->Visit("output_placeholders", &output_placeholders);
     v->Visit("body", &body);
   }
-  TVM_DLL static Operation make(std::string name, std::string tag, Map<String, ObjectRef> attrs,
-                                Array<Tensor> inputs, Array<Buffer> input_placeholders,
-                                Array<Buffer> output_placeholders, Stmt body);
 
   static constexpr const char* _type_key = "ExternOp";
   TVM_DECLARE_FINAL_OBJECT_INFO(ExternOpNode, OperationNode);
 };
 
+/*!
+ * \brief Managed reference to ExternOpNode
+ * \sa ExternOpNode
+ */
+class ExternOp : public Operation {
+ public:
+  TVM_DLL ExternOp(std::string name, std::string tag, Map<String, ObjectRef> attrs,
+                   Array<Tensor> inputs, Array<Buffer> input_placeholders,
+                   Array<Buffer> output_placeholders, Stmt body);
+
+  TVM_DEFINE_OBJECT_REF_METHODS(ExternOp, Operation, ExternOpNode);
+};
+
 /*!
  * \brief A computation operator that generated by hybrid script.
  */
@@ -459,13 +509,23 @@ class HybridOpNode : public OperationNode {
     v->Visit("axis", &axis);
     v->Visit("body", &body);
   }
-  TVM_DLL static Operation make(std::string name, std::string tag, Map<String, ObjectRef> attrs,
-                                Array<Tensor> inputs, Array<Tensor> outputs, Stmt body);
 
   static constexpr const char* _type_key = "HybridOp";
   TVM_DECLARE_FINAL_OBJECT_INFO(HybridOpNode, OperationNode);
 };
 
+/*!
+ * \brief Managed reference to HybridOpNode
+ * \sa HybridOpNode
+ */
+class HybridOp : public Operation {
+ public:
+  TVM_DLL HybridOp(std::string name, std::string tag, Map<String, ObjectRef> attrs,
+                   Array<Tensor> inputs, Array<Tensor> outputs, Stmt body);
+
+  TVM_DEFINE_OBJECT_REF_METHODS(HybridOp, Operation, HybridOpNode);
+};
+
 /*!
  * \brief Construct a new Var expression
  * \param name_hint The name hint for the expression

include/tvm/te/schedule.h

@@ -277,6 +277,12 @@ class Schedule : public ObjectRef {
  public:
   Schedule() {}
   explicit Schedule(ObjectPtr<Object> n) : ObjectRef(n) {}
+  /*!
+   * \brief Create a schedule for array of ops(and their dependencies).
+   * \param ops The ops to be scheduled.
+   * \return sch The created Schedule.
+   */
+  TVM_DLL explicit Schedule(Array<Operation> ops);
   /*!
    * \brief Get a copy of current schedule.
    * \return The copied schedule.
@@ -553,13 +559,6 @@ class ScheduleNode : public Object {
    */
   TVM_DLL bool Contain(const Tensor& tensor) const { return Contain(tensor->op); }
 
-  /*!
-   * \brief Create a schedule for array of ops(and their dependencies).
-   * \param ops The ops to be scheduled.
-   * \return sch The created Schedule.
-   */
-  TVM_DLL static Schedule make(Array<Operation> ops);
-
   static constexpr const char* _type_key = "Schedule";
   TVM_DECLARE_FINAL_OBJECT_INFO(ScheduleNode, Object);
 };
@@ -569,7 +568,7 @@ class ScheduleNode : public Object {
  * \param ops The ops to be scheduled.
  * \return sch The created Schedule.
  */
-inline Schedule create_schedule(Array<Operation> ops) { return ScheduleNode::make(ops); }
+inline Schedule create_schedule(Array<Operation> ops) { return Schedule(ops); }
 
 /*! \brief node container for IterVar attr */
 class IterVarAttrNode : public Object {
@@ -648,13 +647,21 @@ class SplitNode : public IterVarRelationNode {
     v->Visit("nparts", &nparts);
   }
 
-  static IterVarRelation make(IterVar parent, IterVar outer, IterVar inner, PrimExpr factor,
-                              PrimExpr nparts);
-
   static constexpr const char* _type_key = "Split";
   TVM_DECLARE_FINAL_OBJECT_INFO(SplitNode, IterVarRelationNode);
 };
 
+/*!
+ * \brief Managed reference to SplitNode
+ * \sa SplitNode
+ */
+class Split : public IterVarRelation {
+ public:
+  TVM_DLL Split(IterVar parent, IterVar outer, IterVar inner, PrimExpr factor, PrimExpr nparts);
+
+  TVM_DEFINE_OBJECT_REF_METHODS(Split, IterVarRelation, SplitNode);
+};
+
 /*!
  * \brief Fuse two domains into one domain.
  */
@@ -673,12 +680,21 @@ class FuseNode : public IterVarRelationNode {
     v->Visit("fused", &fused);
   }
 
-  static IterVarRelation make(IterVar outer, IterVar inner, IterVar fused);
-
   static constexpr const char* _type_key = "Fuse";
   TVM_DECLARE_FINAL_OBJECT_INFO(FuseNode, IterVarRelationNode);
 };
 
+/*!
+ * \brief Managed reference to FuseNode
+ * \sa FuseNode
+ */
+class Fuse : public IterVarRelation {
+ public:
+  TVM_DLL Fuse(IterVar outer, IterVar inner, IterVar fused);
+
+  TVM_DEFINE_OBJECT_REF_METHODS(Fuse, IterVarRelation, FuseNode);
+};
+
 /*!
  * \brief Rebase the iteration to make min to be 0.
  *  This is useful to normalize the Schedule
@@ -696,12 +712,21 @@ class RebaseNode : public IterVarRelationNode {
     v->Visit("rebased", &rebased);
   }
 
-  static IterVarRelation make(IterVar parent, IterVar rebased);
-
   static constexpr const char* _type_key = "Rebase";
   TVM_DECLARE_FINAL_OBJECT_INFO(RebaseNode, IterVarRelationNode);
 };
 
+/*!
+ * \brief Managed reference to RebaseNode
+ * \sa RebaseNode
+ */
+class Rebase : public IterVarRelation {
+ public:
+  TVM_DLL Rebase(IterVar parent, IterVar rebased);
+
+  TVM_DEFINE_OBJECT_REF_METHODS(Rebase, IterVarRelation, RebaseNode);
+};
+
 /*!
  * \brief Singleton iterator [0, 1)
  */
@@ -712,12 +737,21 @@ class SingletonNode : public IterVarRelationNode {
 
   void VisitAttrs(AttrVisitor* v) { v->Visit("iter", &iter); }
 
-  static IterVarRelation make(IterVar iter);
-
   static constexpr const char* _type_key = "Singleton";
   TVM_DECLARE_FINAL_OBJECT_INFO(SingletonNode, IterVarRelationNode);
 };
 
+/*!
+ * \brief Managed reference to SingletonNode
+ * \sa SingletonNode
+ */
+class Singleton : public IterVarRelation {
+ public:
+  TVM_DLL explicit Singleton(IterVar iter);
+
+  TVM_DEFINE_OBJECT_REF_METHODS(Singleton, IterVarRelation, SingletonNode);
+};
+
 /*! \brief Container for specialization conditions. */
 class SpecializedConditionNode : public Object {
  public: