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https://github.com/darlinghq/darling-JavaScriptCore.git
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63 lines
2.7 KiB
C++
63 lines
2.7 KiB
C++
/*
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* Copyright (C) 2016-2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "DFGRegisteredStructure.h"
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#include "HeapCell.h"
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#include <wtf/StdLibExtras.h>
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#if ENABLE(DFG_JIT)
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namespace JSC { namespace DFG {
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// This type used in passing an immediate argument to Node constructor;
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// distinguishes an immediate value (typically an index into a CodeBlock data structure -
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// a constant index, argument, or identifier) from a Node*.
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struct OpInfo {
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OpInfo() : m_value(0) { }
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template<
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typename IntegralType,
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typename Constraint = typename std::enable_if<(std::is_integral<IntegralType>::value || std::is_enum<IntegralType>::value) && sizeof(IntegralType) <= sizeof(uint64_t)>::type>
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explicit OpInfo(IntegralType value)
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: m_value(static_cast<uint64_t>(value)) { }
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explicit OpInfo(RegisteredStructure structure) : m_value(static_cast<uint64_t>(bitwise_cast<uintptr_t>(structure))) { }
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template <typename T>
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explicit OpInfo(T* ptr)
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{
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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.");
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static_assert(!std::is_base_of<StructureSet, T>::value, "To make an OpInfo with a structure set in, make sure to use RegisteredStructureSet.");
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m_value = static_cast<uint64_t>(reinterpret_cast<uintptr_t>(ptr));
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}
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uint64_t m_value;
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};
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} } // namespace JSC::DFG
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#endif // ENABLE(DFG_JIT)
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