src/tint/lang/core/ir/load.h

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#ifndef SRC_TINT_LANG_CORE_IR_LOAD_H_
#define SRC_TINT_LANG_CORE_IR_LOAD_H_

#include <string>

#include "src/tint/lang/core/ir/operand_instruction.h"
#include "src/tint/utils/rtti/castable.h"

namespace tint::core::ir {

/// A load instruction in the IR.
class Load final : public Castable<Load, OperandInstruction<1, 1>> {
  public:
    /// The offset in Operands() for the from value
    static constexpr size_t kFromOperandOffset = 0;

    /// The fixed number of results returned by this instruction
    static constexpr size_t kNumResults = 1;

    /// The fixed number of operands used by this instruction
    static constexpr size_t kNumOperands = 1;

    /// Constructor (no results, no operands)
    /// @param id the instruction id
    explicit Load(Id id);

    /// Constructor
    /// @param id the instruction id
    /// @param result the result value
    /// @param from the value being loaded from
    Load(Id id, InstructionResult* result, Value* from);

    ~Load() override;

    /// @copydoc Instruction::Clone()
    Load* Clone(CloneContext& ctx) override;

    /// @returns the value being loaded from
    Value* From() { return Operand(kFromOperandOffset); }

    /// @returns the value being loaded from
    const Value* From() const { return Operand(kFromOperandOffset); }

    /// @returns the friendly name for the instruction
    std::string FriendlyName() const override { return "load"; }

    /// @returns the side effects for this instruction
    Accesses GetSideEffects() const override;
};

}  // namespace tint::core::ir

#endif  // SRC_TINT_LANG_CORE_IR_LOAD_H_