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 * Copyright (C) 2011-2024 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.
 *
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 */

#pragma once

#if ENABLE(DFG_JIT)

#include "DFGCFG.h"
#include "DFGGraph.h"
#include <wtf/Dominators.h>
#include <wtf/Noncopyable.h>
#include <wtf/TZoneMalloc.h>

namespace JSC { namespace DFG {

template <typename CFGKind>
class Dominators : public WTF::Dominators<CFGKind> {
    WTF_MAKE_NONCOPYABLE(Dominators);
    WTF_MAKE_SEQUESTERED_ARENA_ALLOCATED_TEMPLATE(Dominators);
public:
    Dominators(Graph& graph)
        : WTF::Dominators<CFGKind>(selectCFG<CFGKind>(graph))
    {
    }
};

WTF_MAKE_SEQUESTERED_ARENA_ALLOCATED_TEMPLATE_IMPL(template<typename CFGKind>, Dominators<CFGKind>);

using SSADominators = Dominators<SSACFG>;
using CPSDominators = Dominators<CPSCFG>;

template<typename> struct DominatorsSelection;

template<>
struct DominatorsSelection<CPSCFG> {
    static CPSDominators& select(Graph& graph LIFETIME_BOUND)
    {
        return graph.ensureCPSDominators();
    }
};

template<>
struct DominatorsSelection<SSACFG> {
    static SSADominators& select(Graph& graph LIFETIME_BOUND)
    {
        return graph.ensureSSADominators();
    }
};

template<typename T>
auto& ensureDominatorsForCFG(Graph& graph LIFETIME_BOUND)
{
    return DominatorsSelection<T>::select(graph);
}

} } // namespace JSC::DFG

#endif // ENABLE(DFG_JIT)
