arkcompiler_ets_runtime/ecmascript/compiler/argument_accessor.h

/*
 * Copyright (c) 2022 Huawei Device Co., Ltd.
 * 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 ECMASCRIPT_COMPILER_ARGUMENT_ACCESSOR_H
#define ECMASCRIPT_COMPILER_ARGUMENT_ACCESSOR_H

#include "ecmascript/compiler/circuit.h"
#include "ecmascript/compiler/gate.h"
#include "ecmascript/js_method.h"

namespace panda::ecmascript::kungfu {
enum class CommonArgIdx : uint8_t {
    GLUE = 0,
    LEXENV,
    ACTUAL_ARGC,
    FUNC,
    NEW_TARGET,
    THIS,
    NUM_OF_ARGS,
};

class ArgumentAccessor {
public:
    explicit ArgumentAccessor(Circuit *circuit, const JSMethod *method = nullptr)
        : circuit_(circuit), method_(method),
          argRoot_(Circuit::GetCircuitRoot(OpCode(OpCode::ARG_LIST))) {}
    ~ArgumentAccessor() = default;

    void NewCommonArg(const CommonArgIdx argIndex, MachineType machineType, GateType gateType);
    void NewArg(const size_t argIndex);
    // jsmethod must be set
    size_t GetActualNumArgs() const;
    // jsmethod must be set
    GateRef GetArgGate(const size_t currentVreg) const;
    GateRef GetCommonArgGate(const CommonArgIdx arg) const;

private:
    std::vector<GateRef> GetFunctionArgs() const;
    size_t GetFunctionArgIndex(const size_t currentVreg, const bool haveFunc,
                               const bool haveNewTarget, const bool haveThis) const;

    Circuit *circuit_ {nullptr};
    const JSMethod *method_ {nullptr};
    GateRef argRoot_;
};
}
#endif  // ECMASCRIPT_COMPILER_ARGUMENT_ACCESSOR_H