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From GitBox <...@apache.org>
Subject [GitHub] [incubator-tvm] tqchen commented on a change in pull request #5838: [Target] Introduce Target Id Registry
Date Thu, 18 Jun 2020 23:24:15 GMT

tqchen commented on a change in pull request #5838:
URL: https://github.com/apache/incubator-tvm/pull/5838#discussion_r442552150



##########
File path: include/tvm/target/target_id.h
##########
@@ -0,0 +1,228 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+/*!
+ * \file tvm/target/target_id.h
+ * \brief Target id registry
+ */
+#ifndef TVM_TARGET_TARGET_ID_H_
+#define TVM_TARGET_TARGET_ID_H_
+
+#include <tvm/ir/expr.h>
+#include <tvm/ir/transform.h>
+#include <tvm/node/attr_registry_map.h>
+#include <tvm/runtime/container.h>
+#include <tvm/runtime/packed_func.h>
+#include <tvm/support/with.h>
+
+#include <string>
+#include <unordered_map>
+#include <utility>
+#include <vector>
+
+namespace tvm {
+
+template <typename>
+class TargetIdAttrMap;
+
+/*! \brief Target Id, specifies the kind of the target */
+class TargetIdNode : public Object {
+ public:
+  /*! \brief Name of the target id */
+  String name;
+  static constexpr const char* _type_key = "TargetId";
+  TVM_DECLARE_FINAL_OBJECT_INFO(TargetIdNode, Object);
+
+ private:
+  uint32_t AttrRegistryIndex() const { return index_; }
+  std::string AttrRegistryName() const { return name; }
+  /*! \brief Stores the required type_key and type_index of a specific attr of a target */
+  struct ValueTypeInfo {
+    std::string type_key;
+    uint32_t type_index;
+  };
+  /*!
+   * \brief Register an attribute with the type specified by the type_index
+   * \param key The name of the attribute
+   * \param value_type_index The type index of the value of the attribute
+   */
+  void RegisterAttrOption(const std::string& key, uint32_t value_type_index);
+  /*! \brief A hash table that stores the type information of each attr of the target key
*/
+  std::unordered_map<std::string, ValueTypeInfo> key2vtype_;
+  /*! \brief Index used for internal lookup of attribute registry */
+  uint32_t index_;
+  template <typename, typename>
+  friend class AttrRegistry;
+  friend class TargetIdRegEntry;
+};
+
+/*!
+ * \brief Managed reference class to TargetIdNode
+ * \sa TargetIdNode
+ */
+class TargetId : public ObjectRef {
+ public:
+  /*! \brief Mutable access to the container class  */
+  TargetIdNode* operator->() { return static_cast<TargetIdNode*>(data_.get()); }
+
+  /*! \brief Get the attribute map given the attribute name. */
+  template <typename ValueType>
+  static inline TargetIdAttrMap<ValueType> GetAttrMap(const String& attr_name);
+
+  TVM_DEFINE_NOTNULLABLE_OBJECT_REF_METHODS(TargetId, ObjectRef, TargetIdNode);
+
+ private:
+  static const AttrRegistryMapContainerMap<TargetId>& GetAttrMapContainer(const
String& attr_name);
+  template <typename, typename>
+  friend class AttrRegistry;
+};
+
+/*!
+ * \brief Map<TargetId, ValueType> used to store meta-information about TargetId
+ * \tparam ValueType The type of the value stored in map
+ */
+template <typename ValueType>
+class TargetIdAttrMap : public AttrRegistryMap<TargetId, ValueType> {
+ public:
+  using TParent = AttrRegistryMap<TargetId, ValueType>;
+  using TParent::count;
+  using TParent::get;
+  using TParent::operator[];
+  explicit TargetIdAttrMap(const AttrRegistryMapContainerMap<TargetId>& map) :
TParent(map) {}
+};
+
+/*!
+ * \brief Helper structure to register TargetId
+ * \sa TVM_REGISTER_TARGET_ID
+ */
+class TargetIdRegEntry {
+ public:
+  /*!
+   * \brief Register additional attributes to target_id.
+   * \param attr_name The name of the attribute.
+   * \param value The value to be set.
+   * \param plevel The priority level of this set,
+   *  an higher priority level attribute
+   *  will replace lower priority level attribute.
+   *  Must be bigger than 0.
+   *
+   *  Cannot set with same plevel twice in the code.
+   *
+   * \tparam ValueType The type of the value to be set.
+   */
+  template <typename ValueType>
+  inline TargetIdRegEntry& set_attr(const String& attr_name, const ValueType&
value,
+                                    int plevel = 10);
+  /*!
+   * \brief Register a valid configuration option and its ValueType for validation
+   * \param key The configuration key
+   * \tparam ValueType The value type to be registered
+   */
+  template <typename ValueType>
+  inline TargetIdRegEntry& add_attr_option(const std::string& key);
+  /*! \brief Set name of the TargetId to be the same as registry if it is empty */
+  inline TargetIdRegEntry& set_name();
+  /*!
+   * \brief Register or get a new entry.
+   * \param name The name of the TargetId.
+   * \return the corresponding entry.
+   */
+  static TargetIdRegEntry& RegisterOrGet(const String& name);
+
+ private:
+  TargetId id_;
+  String name;
+
+  /*! \brief private constructor */
+  explicit TargetIdRegEntry(uint32_t reg_index) : id_(make_object<TargetIdNode>())
{
+    id_->index_ = reg_index;
+  }
+  /*!
+   * \brief update the attribute TargetIdAttrMap
+   * \param key The name of the attribute
+   * \param value The value to be set
+   * \param plevel The priority level
+   */
+  void UpdateAttr(const String& key, TVMRetValue value, int plevel);
+  template <typename, typename>
+  friend class AttrRegistry;
+};
+
+#ifndef TVM_STRINGIZE_DETAIL
+#define TVM_STRINGIZE_DETAIL(x) #x

Review comment:
       Do not need to duplicate the STRINGIZE macro, perhaps move everything to a common place




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