/* * Copyright (C) 2016-2017 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. */ #pragma once #include "DFGRegisteredStructure.h" #include "HeapCell.h" #include <wtf/StdLibExtras.h> #if ENABLE(DFG_JIT) namespace JSC { namespace DFG { // This type used in passing an immediate argument to Node constructor; // distinguishes an immediate value (typically an index into a CodeBlock data structure - // a constant index, argument, or identifier) from a Node*. struct OpInfo { OpInfo() : m_value(0) { } template< typename IntegralType, typename Constraint = typename std::enable_if<(std::is_integral<IntegralType>::value || std::is_enum<IntegralType>::value) && sizeof(IntegralType) <= sizeof(uint64_t)>::type> explicit OpInfo(IntegralType value) : m_value(static_cast<uint64_t>(value)) { } explicit OpInfo(RegisteredStructure structure) : m_value(static_cast<uint64_t>(bitwise_cast<uintptr_t>(structure))) { } template <typename T> explicit OpInfo(T* ptr) { static_assert(!std::is_base_of<HeapCell, T>::value, "To make an OpInfo with a cell in it, the cell must be registered or frozen."); static_assert(!std::is_base_of<StructureSet, T>::value, "To make an OpInfo with a structure set in, make sure to use RegisteredStructureSet."); m_value = static_cast<uint64_t>(reinterpret_cast<uintptr_t>(ptr)); } uint64_t m_value; }; } } // namespace JSC::DFG #endif // ENABLE(DFG_JIT)