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

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#ifndef SRC_TINT_LANG_CORE_IR_BITCAST_H_
#define SRC_TINT_LANG_CORE_IR_BITCAST_H_

#include <string>

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

namespace tint::core::ir {

/// A bitcast instruction in the IR.
class Bitcast final : public Castable<Bitcast, Call> {
  public:
    /// The offset in Operands() for the value
    static constexpr size_t kValueOperandOffset = 0;

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

    /// The fixed number of operands expected for this instruction
    static constexpr size_t kNumOperands = 1;

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

    /// Constructor
    /// @param id the instruction id
    /// @param result the result value
    /// @param val the value being bitcast
    Bitcast(Id id, InstructionResult* result, Value* val);

    ~Bitcast() override;

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

    /// @returns the operand value
    Value* Val() { return Operand(kValueOperandOffset); }

    /// @returns the operand value
    const Value* Val() const { return Operand(kValueOperandOffset); }

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

    /// @returns an empty access as the bitcast neither loads nor stores.
    Accesses GetSideEffects() const override { return Accesses{}; }
};

}  // namespace tint::core::ir

#endif  // SRC_TINT_LANG_CORE_IR_BITCAST_H_