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

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#ifndef SRC_TINT_LANG_CORE_IR_LOAD_VECTOR_ELEMENT_H_
#define SRC_TINT_LANG_CORE_IR_LOAD_VECTOR_ELEMENT_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 for a single vector element in the IR.
class LoadVectorElement final : public Castable<LoadVectorElement, OperandInstruction<3, 0>> {
  public:
    /// The offset in Operands() for the `from` value
    static constexpr size_t kFromOperandOffset = 0;

    /// The offset in Operands() for the `index` value
    static constexpr size_t kIndexOperandOffset = 1;

    /// Constructor
    /// @param result the result value
    /// @param from the vector pointer
    /// @param index the new vector element index
    LoadVectorElement(InstructionResult* result, ir::Value* from, ir::Value* index);
    ~LoadVectorElement() override;

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

    /// @returns the vector pointer value
    ir::Value* From() { return operands_[kFromOperandOffset]; }

    /// @returns the vector pointer value
    const ir::Value* From() const { return operands_[kFromOperandOffset]; }

    /// @returns the new vector element index
    ir::Value* Index() { return operands_[kIndexOperandOffset]; }

    /// @returns the new vector element index
    const ir::Value* Index() const { return operands_[kIndexOperandOffset]; }

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

}  // namespace tint::core::ir

#endif  // SRC_TINT_LANG_CORE_IR_LOAD_VECTOR_ELEMENT_H_