Source/JavaScriptCore/jit/RegisterAtOffsetList.h

/*
 * Copyright (C) 2015-2016 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 */

#pragma once

#if ENABLE(ASSEMBLER)

#include "RegisterAtOffset.h"
#include "RegisterSet.h"

namespace JSC {

class RegisterAtOffsetList {
    WTF_MAKE_FAST_ALLOCATED;
public:
    enum OffsetBaseType { FramePointerBased, ZeroBased };

    RegisterAtOffsetList();
    explicit RegisterAtOffsetList(RegisterSet, OffsetBaseType = FramePointerBased);

    void dump(PrintStream&) const;

    void clear()
    {
        m_registers.clear();
    }

    size_t size() const
    {
        return m_registers.size();
    }

    const RegisterAtOffset& at(size_t index) const
    {
        return m_registers.at(index);
    }

    RegisterAtOffset& at(size_t index)
    {
        return m_registers.at(index);
    }
    
    RegisterAtOffset* find(Reg) const;
    unsigned indexOf(Reg) const; // Returns UINT_MAX if not found.

    Vector<RegisterAtOffset>::const_iterator begin() const { return m_registers.begin(); }
    Vector<RegisterAtOffset>::const_iterator end() const { return m_registers.end(); }

    static const RegisterAtOffsetList& llintBaselineCalleeSaveRegisters(); // Registers and Offsets saved and used by the LLInt.

private:
    Vector<RegisterAtOffset> m_registers;
};

} // namespace JSC

#endif // ENABLE(ASSEMBLER)