| // Copyright 2023 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_LANG_CORE_IR_VAR_H_ |
| #define SRC_TINT_LANG_CORE_IR_VAR_H_ |
| |
| #include "src/tint/lang/core/builtin/access.h" |
| #include "src/tint/lang/core/builtin/address_space.h" |
| #include "src/tint/lang/core/ir/binding_point.h" |
| #include "src/tint/lang/core/ir/operand_instruction.h" |
| #include "src/tint/lang/core/type/pointer.h" |
| #include "src/tint/utils/containers/vector.h" |
| #include "src/tint/utils/rtti/castable.h" |
| |
| namespace tint::ir { |
| |
| /// A var instruction in the IR. |
| class Var : public utils::Castable<Var, OperandInstruction<1, 1>> { |
| public: |
| /// The offset in Operands() for the initializer |
| static constexpr size_t kInitializerOperandOffset = 0; |
| |
| /// Constructor |
| /// @param result the result value |
| explicit Var(InstructionResult* result); |
| ~Var() override; |
| |
| /// Sets the var initializer |
| /// @param initializer the initializer |
| void SetInitializer(Value* initializer); |
| /// @returns the initializer |
| Value* Initializer() { return operands_[kInitializerOperandOffset]; } |
| |
| /// Sets the binding point |
| /// @param group the group |
| /// @param binding the binding |
| void SetBindingPoint(uint32_t group, uint32_t binding) { binding_point_ = {group, binding}; } |
| /// @returns the binding points if `Attributes` contains `kBindingPoint` |
| std::optional<struct BindingPoint> BindingPoint() { return binding_point_; } |
| |
| /// Destroys this instruction along with any assignment instructions, if the var is never read. |
| void DestroyIfOnlyAssigned(); |
| |
| /// @returns the friendly name for the instruction |
| std::string_view FriendlyName() override { return "var"; } |
| |
| private: |
| std::optional<struct BindingPoint> binding_point_; |
| }; |
| |
| } // namespace tint::ir |
| |
| #endif // SRC_TINT_LANG_CORE_IR_VAR_H_ |