[PASS] Schedule Ops init working version (#6)

* [PASS] Schedule Ops init working version

* bugfix in PassUp

Author: tqchen

HalideIR

@@ -17,6 +17,7 @@ namespace tvm {
 
 using Halide::Type;
 using Halide::Float;
+using Halide::Bool;
 using Halide::Int;
 using Halide::UInt;
 using Halide::Handle;
@@ -29,6 +30,8 @@ using Halide::Internal::Stmt;
 using Halide::Internal::IRPrinter;
 using Halide::Internal::Variable;
 
+using Halide::Internal::make_const;
+
 /*! \brief a named variable in TVM */
 class Var : public Halide::VarExpr {
  public:

include/tvm/expr.h

@@ -18,6 +18,16 @@
 namespace tvm {
 namespace ir {
 
+
+/*!
+ * \brief Schedule s' dependent operations.
+ *
+ * \param s The schedule to be realized
+ * \param dom_map The domain of each iter vars.
+ * \return the result Stmt
+ */
+Stmt ScheduleOps(Schedule s, Map<IterVar, Range> dom_map);
+
 /*!
  * \brief verifies whether the IR stmt or Expr is in SSA form.
  *  That is: each VarExpr is defined and assigned once(in Let/For)
@@ -51,14 +61,6 @@ Stmt Inline(FunctionRef f,
             Expr body,
             Stmt stmt);
 
-/*!
- * \brief Schedule s' dependent operations.
- *
- * \param s The schedule to be realized
- * \return the result Stmt
- */
-Stmt ScheduelOps(Schedule s);
-
 }  // namespace ir
 }  // namespace tvm
 

include/tvm/ir_pass.h

@@ -12,6 +12,36 @@
 
 namespace tvm {
 
+/*!
+ * \brief A placeholder op represents an input placeholder.
+ */
+class PlaceholderOpNode : public OperationNode {
+ public:
+  /*! \brief The shape of the input */
+  Array<Expr> shape;
+  /*! \brief The data type of the input. */
+  Type dtype;
+
+  int num_outputs() const final {
+    return 1;
+  }
+  Array<IterVar> root_iter_vars() const final;
+  Type output_dtype(size_t i) const final;
+  Array<Expr> output_shape(size_t i) const final;
+
+  void VisitAttrs(AttrVisitor* v) final {
+    v->Visit("name", &name);
+    v->Visit("shape", &shape);
+    v->Visit("dtype", &dtype);
+  }
+  static Operation make(std::string name,
+                        Array<Expr> shape,
+                        Type dtype);
+
+  static constexpr const char* _type_key = "PlaceholderOp";
+  TVM_DECLARE_NODE_TYPE_INFO(PlaceholderOpNode);
+};
+
 /*!
  * \brief A Compute op that compute a tensor on certain domain.
  */
@@ -24,11 +54,10 @@ class ComputeOpNode : public OperationNode {
   /*! \brief constructor */
   ComputeOpNode() {}
 
-  size_t num_outputs() const final {
+  int num_outputs() const final {
     return 1;
   }
   Array<IterVar> root_iter_vars() const final;
-  std::string output_name(size_t i) const final;
   Type output_dtype(size_t i) const final;
   Array<Expr> output_shape(size_t i) const final;
 
@@ -49,6 +78,16 @@ class ComputeOpNode : public OperationNode {
 /*! \brief The compute function to specify the input source of a Tensor */
 using FCompute = std::function<Expr (const Array<Var>& i)>;
 
+/*!
+ * \brief create a place holder tensor.
+ * \param shape The shape of the tensor.
+ * \param dtype the data type of the tensor.
+ * \param name The name of the Tensor.
+ */
+Tensor Placeholder(Array<Expr> shape,
+                   Type dtype = Float(32),
+                   std::string name = "placeholder");
+
 /*!
  * \brief Construct a new tensor by computing over shape,
  *  using the computation rule: result_tensor[axis] = fcompute(axis)

include/tvm/operation.h

@@ -1,14 +1,17 @@
 /*!
  *  Copyright (c) 2016 by Contributors
- * \file bound.h
- * \brief The bound inference logics on the schedule.
+ * \file schedule_pass.h
+ * \brief  Collection of Schedule pass functions.
+ *
+ *  These passes works on the schedule hyper-graph
+ *  and infers information such as bounds, check conditions
+ *  read/write dependencies between the IterVar
  */
-#ifndef TVM_SCHEDULE_BOUND_H_
-#define TVM_SCHEDULE_BOUND_H_
+#ifndef TVM_SCHEDULE_PASS_H_
+#define TVM_SCHEDULE_PASS_H_
 
-#include <tvm/expr.h>
-#include <tvm/schedule.h>
-#include <unordered_map>
+#include "./base.h"
+#include "./schedule.h"
 
 namespace tvm {
 namespace schedule {
@@ -23,5 +26,4 @@ Map<IterVar, Range> InferBound(Schedule sch);
 
 }  // namespace schedule
 }  // namespace tvm
-
-#endif  // TVM_SCHEDULE_BOUND_H_
+#endif  // TVM_SCHEDULE_PASS_H_

src/schedule/bound.h renamed to include/tvm/schedule_pass.h

@@ -28,20 +28,11 @@ using Halide::IR::FunctionRef;
  * \brief Tensor structure representing a possible input,
  *  or intermediate computation result.
  */
-class Tensor : public FunctionRef {
+class Tensor : public NodeRef {
  public:
   /*! \brief default constructor, used internally */
   Tensor() {}
-  explicit Tensor(std::shared_ptr<Node> n) : FunctionRef(n) {}
-  /*!
-   * \brief constructor of input tensor
-   * \param shape Shape of the tensor.
-   * \param name optional name of the Tensor.
-   * \param dtype The data type of the input tensor.
-   */
-  explicit Tensor(Array<Expr> shape,
-                  std::string name = "tensor",
-                  Type dtype = Float(32));
+  explicit Tensor(std::shared_ptr<Node> n) : NodeRef(n) {}
   /*!
    * \brief access the internal node container
    * \return the pointer to the internal node container
@@ -116,11 +107,11 @@ class Tensor : public FunctionRef {
 };
 
 /*! \brief Operation that produces tensors */
-class Operation : public NodeRef {
+class Operation : public FunctionRef {
  public:
   /*! \brief default constructor  */
   Operation() {}
-  explicit Operation(std::shared_ptr<Node> n) : NodeRef(n) {}
+  explicit Operation(std::shared_ptr<Node> n) : FunctionRef(n) {}
   /*!
    * \brief access the internal node container
    * \return the pointer to the internal node container
@@ -137,12 +128,10 @@ class Operation : public NodeRef {
 };
 
 /*! \brief Node to represent a tensor */
-class TensorNode : public FunctionBaseNode {
+class TensorNode : public Node {
  public:
   /*! \brief The shape of the tensor */
   Array<Expr> shape;
-  /*! \brief optional name of the tensor */
-  std::string name;
   /*! \brief data type in the content of the tensor */
   Type dtype;
   /*! \brief the source operation, can be None */
@@ -154,19 +143,11 @@ class TensorNode : public FunctionBaseNode {
 
   void VisitAttrs(AttrVisitor* v) final {
     v->Visit("shape", &shape);
-    v->Visit("name", &name);
     v->Visit("dtype", &dtype);
     v->Visit("op", &op);
     v->Visit("value_index", &value_index);
   }
-  const std::string& func_name() const final {
-    return name;
-  }
-  int outputs() const final {
-    return 1;
-  }
   static Tensor make(Array<Expr> shape,
-                     std::string name,
                      Type dtype,
                      Operation op,
                      int value_index);
@@ -178,16 +159,18 @@ class TensorNode : public FunctionBaseNode {
 /*!
  * \brief base class of operation node.
  */
-class OperationNode : public Node {
+class OperationNode : public FunctionBaseNode {
  public:
   /*! \brief optional name of the operation */
   std::string name;
+  /*! \return name of the operation */
+  const std::string& func_name() const final {
+    return name;
+  }
+  /*! \return number of outputs of this op */
+  virtual int num_outputs() const = 0;
   /*! \return the list of iteration variable at root */
   virtual Array<IterVar> root_iter_vars() const = 0;
-  /*! \return number of outputs of this op */
-  virtual size_t num_outputs() const = 0;
-  /*! \return name of i-th output */
-  virtual std::string output_name(size_t i) const = 0;
   /*! \return type of i-th output */
   virtual Type output_dtype(size_t i) const = 0;
   /*! \return shape of i-th output */

include/tvm/tensor.h

@@ -33,7 +33,7 @@ def Var(name="tindex", dtype=int32):
     return _function_internal._Var(name, dtype)
 
 
-def placeholder(shape, dtype = None, name="TensorObj"):
+def placeholder(shape, dtype = None, name="placeholder"):
     """Construct an empty tensor object.
 
     Parameters
@@ -53,11 +53,11 @@ def placeholder(shape, dtype = None, name="TensorObj"):
         The created tensor
     """
     dtype = float32 if dtype is None else dtype
-    return _function_internal._Tensor(
-        shape, name, dtype, None, 0)
+    return _function_internal._Placeholder(
+        shape, dtype, name)
 
 
-def compute(shape, fcompute, name="TensorCompute"):
+def compute(shape, fcompute, name="compute"):
     """Construct a new tensor by computing over the shape domain.
 
     The compute rule is result[axis] = fcompute(axis)

python/tvm/function.py

@@ -34,7 +34,9 @@ def __call__(self, *indices):
             else:
                 raise ValueError("The indices must be expression")
 
-        return _make.Call(self.dtype, self.name, args, _expr.Call.Halide, self, 0)
+        return _make.Call(self.dtype, self.op.name,
+                          args, _expr.Call.Halide,
+                          self.op, self.value_index)
 
     def __getitem__(self, indices):
         return TensorSlice(self, indices)
@@ -71,3 +73,7 @@ def output(self, index):
 @register_node
 class ComputeOp(Operation):
     pass
+
+@register_node
+class PlaceholderOp(Operation):
+    pass

python/tvm/tensor.py

@@ -29,6 +29,17 @@ TVM_REGISTER_API(_make_For)
                      args.at(5));
   });
 
+TVM_REGISTER_API(_make_Realize)
+.set_body([](const ArgStack& args,  RetValue *ret) {
+    *ret = Realize::make(args.at(0),
+                         args.at(1),
+                         args.at(2),
+                         args.at(3),
+                         args.at(4),
+                         args.at(5));
+  });
+
+
 TVM_REGISTER_API(_make_Call)
 .set_body([](const ArgStack& args,  RetValue *ret) {
     *ret = Call::make(args.at(0),
@@ -113,9 +124,8 @@ REGISTER_MAKE3(LetStmt);
 REGISTER_MAKE2(AssertStmt);
 REGISTER_MAKE3(ProducerConsumer);
 REGISTER_MAKE3(Store);
-REGISTER_MAKE3(Provide);
+REGISTER_MAKE4(Provide);
 REGISTER_MAKE1(Free);
-// TODO(tqchen) Realize;
 REGISTER_MAKE2(Block);
 REGISTER_MAKE3(IfThenElse);
 REGISTER_MAKE1(Evaluate);

src/c_api/c_api_ir.cc

@@ -143,7 +143,6 @@ TVM_REGISTER_API(Range)
 TVM_REGISTER_API(_Tensor)
 .set_body([](const ArgStack& args,  RetValue *ret) {
     *ret = TensorNode::make(args.at(0),
-                            args.at(1),
                             args.at(2),
                             args.at(3),
                             args.at(4));
@@ -160,6 +159,13 @@ TVM_REGISTER_API(_TensorHash)
         std::hash<Tensor>()(args.at(0).operator Tensor()));
   });
 
+TVM_REGISTER_API(_Placeholder)
+.set_body([](const ArgStack& args,  RetValue *ret) {
+    *ret = Placeholder(args.at(0),
+                       args.at(1),
+                       args.at(2));
+  });
+
 TVM_REGISTER_API(_ComputeOp)
 .set_body([](const ArgStack& args,  RetValue *ret) {
     *ret = ComputeOpNode::make(args.at(0),