/* * Copyright (C) 2014 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 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef ConstantStructureCheck_h #define ConstantStructureCheck_h #include "DumpContext.h" #include "JSCell.h" #include "Structure.h" #include <wtf/PrintStream.h> #include <wtf/Vector.h> namespace JSC { class ConstantStructureCheck { public: ConstantStructureCheck() : m_constant(nullptr) , m_structure(nullptr) { } ConstantStructureCheck(JSCell* constant, Structure* structure) : m_constant(constant) , m_structure(structure) { ASSERT(!!m_constant == !!m_structure); } bool operator!() const { return !m_constant; } JSCell* constant() const { return m_constant; } Structure* structure() const { return m_structure; } void dumpInContext(PrintStream&, DumpContext*) const; void dump(PrintStream&) const; private: JSCell* m_constant; Structure* m_structure; }; typedef Vector<ConstantStructureCheck, 2> ConstantStructureCheckVector; Structure* structureFor(const ConstantStructureCheckVector& vector, JSCell* constant); bool areCompatible(const ConstantStructureCheckVector&, const ConstantStructureCheckVector&); void mergeInto(const ConstantStructureCheckVector& source, ConstantStructureCheckVector& target); } // namespace JSC #endif // ConstantStructureCheck_h