| // Copyright (c) 2016 Google Inc. |
| // |
| // Licensed 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. |
| |
| #ifndef LIBSPIRV_OPT_TYPE_MANAGER_H_ |
| #define LIBSPIRV_OPT_TYPE_MANAGER_H_ |
| |
| #include <memory> |
| #include <unordered_map> |
| #include <unordered_set> |
| |
| #include "message.h" |
| #include "module.h" |
| #include "types.h" |
| |
| namespace spvtools { |
| namespace opt { |
| namespace analysis { |
| |
| // A class for managing the SPIR-V type hierarchy. |
| class TypeManager { |
| public: |
| using IdToTypeMap = std::unordered_map<uint32_t, std::unique_ptr<Type>>; |
| using TypeToIdMap = std::unordered_map<const Type*, uint32_t>; |
| using ForwardPointerVector = std::vector<std::unique_ptr<ForwardPointer>>; |
| |
| // Constructs a type manager from the given |module|. All internal messages |
| // will be communicated to the outside via the given message |consumer|. |
| // This instance only keeps a reference to the |consumer|, so the |consumer| |
| // should outlive this instance. |
| TypeManager(const MessageConsumer& consumer, |
| const spvtools::ir::Module& module); |
| |
| TypeManager(const TypeManager&) = delete; |
| TypeManager(TypeManager&&) = delete; |
| TypeManager& operator=(const TypeManager&) = delete; |
| TypeManager& operator=(TypeManager&&) = delete; |
| |
| // Returns the type for the given type |id|. Returns nullptr if the given |id| |
| // does not define a type. |
| Type* GetType(uint32_t id) const; |
| // Returns the id for the given |type|. Returns 0 if can not find the given |
| // |type|. |
| uint32_t GetId(const Type* type) const; |
| // Returns the number of types hold in this manager. |
| size_t NumTypes() const { return id_to_type_.size(); } |
| |
| // Returns the forward pointer type at the given |index|. |
| ForwardPointer* GetForwardPointer(uint32_t index) const; |
| // Returns the number of forward pointer types hold in this manager. |
| size_t NumForwardPointers() const { return forward_pointers_.size(); } |
| |
| private: |
| // Analyzes the types and decorations on types in the given |module|. |
| void AnalyzeTypes(const spvtools::ir::Module& module); |
| |
| // Creates and returns a type from the given SPIR-V |inst|. Returns nullptr if |
| // the given instruction is not for defining a type. |
| Type* RecordIfTypeDefinition(const spvtools::ir::Instruction& inst); |
| // Attaches the decoration encoded in |inst| to a type. Does nothing if the |
| // given instruction is not a decoration instruction or not decorating a type. |
| void AttachIfTypeDecoration(const spvtools::ir::Instruction& inst); |
| |
| const MessageConsumer& consumer_; // Message consumer. |
| IdToTypeMap id_to_type_; // Mapping from ids to their type representations. |
| TypeToIdMap type_to_id_; // Mapping from types to their defining ids. |
| ForwardPointerVector forward_pointers_; // All forward pointer declarations. |
| // All unresolved forward pointer declarations. |
| // Refers the contents in the above vector. |
| std::unordered_set<ForwardPointer*> unresolved_forward_pointers_; |
| }; |
| |
| inline TypeManager::TypeManager(const spvtools::MessageConsumer& consumer, |
| const spvtools::ir::Module& module) |
| : consumer_(consumer) { |
| AnalyzeTypes(module); |
| } |
| |
| } // namespace analysis |
| } // namespace opt |
| } // namespace spvtools |
| |
| #endif // LIBSPIRV_OPT_TYPE_MANAGER_H_ |