| // Copyright 2022 The Tint Authors. |
| // |
| // 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 SRC_TINT_IR_VALUE_H_ |
| #define SRC_TINT_IR_VALUE_H_ |
| |
| #include "src/tint/symbol_table.h" |
| #include "src/tint/type/type.h" |
| #include "src/tint/utils/castable.h" |
| #include "src/tint/utils/string_stream.h" |
| #include "src/tint/utils/unique_vector.h" |
| |
| // Forward declarations |
| namespace tint::ir { |
| class Instruction; |
| } // namespace tint::ir |
| |
| namespace tint::ir { |
| |
| /// Value in the IR. |
| class Value : public utils::Castable<Value> { |
| public: |
| /// Destructor |
| ~Value() override; |
| |
| Value(const Value&) = delete; |
| Value(Value&&) = delete; |
| |
| Value& operator=(const Value&) = delete; |
| Value& operator=(Value&&) = delete; |
| |
| /// Adds an instruction which uses this value. |
| /// @param instr the instruction |
| void AddUsage(const Instruction* instr) { uses_.Add(instr); } |
| |
| /// @returns the vector of instructions which use this value. An instruction will only be |
| /// returned once even if that instruction uses the given value multiple times. |
| utils::VectorRef<const Instruction*> Usage() const { return uses_; } |
| |
| /// @returns the type of the value |
| virtual const type::Type* Type() const = 0; |
| |
| /// Write the value to the given stream |
| /// @param out the stream to write to |
| /// @returns the stream |
| virtual utils::StringStream& ToString(utils::StringStream& out) const = 0; |
| |
| protected: |
| /// Constructor |
| Value(); |
| |
| private: |
| utils::UniqueVector<const Instruction*, 4> uses_; |
| }; |
| |
| } // namespace tint::ir |
| |
| #endif // SRC_TINT_IR_VALUE_H_ |