| // Copyright 2022 The Dawn & Tint Authors |
| // |
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| // list of conditions and the following disclaimer. |
| // |
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| // this list of conditions and the following disclaimer in the documentation |
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| |
| #ifndef SRC_TINT_LANG_CORE_IR_IF_H_ |
| #define SRC_TINT_LANG_CORE_IR_IF_H_ |
| |
| #include <string> |
| |
| #include "src/tint/lang/core/ir/control_instruction.h" |
| #include "src/tint/utils/containers/const_propagating_ptr.h" |
| |
| // Forward declarations |
| namespace tint::core::ir { |
| class MultiInBlock; |
| } // namespace tint::core::ir |
| |
| namespace tint::core::ir { |
| |
| /// If instruction. |
| /// |
| /// ``` |
| /// in |
| /// ┃ |
| /// ┏━━━━━━━━━━┻━━━━━━━━━━┓ |
| /// ▼ ▼ |
| /// ┌────────────┐ ┌────────────┐ |
| /// │ True │ │ False │ |
| /// | (optional) | | (optional) | |
| /// └────────────┘ └────────────┘ |
| /// ExitIf ┃ ┃ ExitIf |
| /// ┗━━━━━━━━━━┳━━━━━━━━━━┛ |
| /// ▼ |
| /// out |
| /// ``` |
| class If final : public Castable<If, ControlInstruction> { |
| public: |
| /// The index of the condition operand |
| static constexpr size_t kConditionOperandOffset = 0; |
| |
| /// Constructor (no results, no operands, no blocks) |
| If(); |
| |
| /// Constructor |
| /// @param cond the if condition |
| /// @param t the true block |
| /// @param f the false block |
| If(Value* cond, ir::Block* t, ir::Block* f); |
| ~If() override; |
| |
| /// @copydoc Instruction::Clone() |
| If* Clone(CloneContext& ctx) override; |
| |
| /// @copydoc ControlInstruction::ForeachBlock |
| void ForeachBlock(const std::function<void(ir::Block*)>& cb) override; |
| |
| /// @copydoc ControlInstruction::ForeachBlock |
| void ForeachBlock(const std::function<void(const ir::Block*)>& cb) const override; |
| |
| /// @returns the if condition |
| Value* Condition() { return Operand(kConditionOperandOffset); } |
| |
| /// @returns the if condition |
| const Value* Condition() const { return Operand(kConditionOperandOffset); } |
| |
| /// @returns the true block |
| ir::Block* True() { return true_; } |
| |
| /// @returns the true block |
| const ir::Block* True() const { return true_; } |
| |
| /// @param block the new true block |
| void SetTrue(ir::Block* block); |
| |
| /// @returns the false block |
| ir::Block* False() { return false_; } |
| |
| /// @returns the false block |
| const ir::Block* False() const { return false_; } |
| |
| /// @param block the new false block |
| void SetFalse(ir::Block* block); |
| |
| /// @returns the friendly name for the instruction |
| std::string FriendlyName() const override { return "if"; } |
| |
| private: |
| ConstPropagatingPtr<ir::Block> true_; |
| ConstPropagatingPtr<ir::Block> false_; |
| }; |
| |
| } // namespace tint::core::ir |
| |
| #endif // SRC_TINT_LANG_CORE_IR_IF_H_ |