mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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104 lines
3.9 KiB
C++
104 lines
3.9 KiB
C++
/*
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* Copyright (C) 2013 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 "DFGCommon.h"
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#include <wtf/HashMap.h>
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#include <wtf/PrintStream.h>
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namespace JSC { namespace DFG {
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class Graph;
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class MinifiedNode;
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class ValueSource;
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struct Node;
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class MinifiedID {
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public:
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MinifiedID() : m_id(invalidID()) { }
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MinifiedID(WTF::HashTableDeletedValueType) : m_id(otherInvalidID()) { }
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explicit MinifiedID(Node* node) : m_id(bitwise_cast<uintptr_t>(node)) { }
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bool operator!() const { return m_id == invalidID(); }
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// This takes Graph& to remind you, that you should only be calling this method
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// when you're in the main compilation pass (i.e. you have a graph) and not later,
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// like during OSR exit compilation.
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Node* node(const Graph&) const { return bitwise_cast<Node*>(m_id); }
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bool operator==(const MinifiedID& other) const { return m_id == other.m_id; }
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bool operator!=(const MinifiedID& other) const { return m_id != other.m_id; }
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bool operator<(const MinifiedID& other) const { return m_id < other.m_id; }
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bool operator>(const MinifiedID& other) const { return m_id > other.m_id; }
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bool operator<=(const MinifiedID& other) const { return m_id <= other.m_id; }
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bool operator>=(const MinifiedID& other) const { return m_id >= other.m_id; }
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unsigned hash() const { return WTF::IntHash<uintptr_t>::hash(m_id); }
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void dump(PrintStream& out) const { out.print(RawPointer(reinterpret_cast<void*>(m_id))); }
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bool isHashTableDeletedValue() const { return m_id == otherInvalidID(); }
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static MinifiedID fromBits(uintptr_t value)
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{
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MinifiedID result;
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result.m_id = value;
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return result;
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}
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uintptr_t bits() const { return m_id; }
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private:
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friend class MinifiedNode;
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static uintptr_t invalidID() { return static_cast<uintptr_t>(static_cast<intptr_t>(-1)); }
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static uintptr_t otherInvalidID() { return static_cast<uintptr_t>(static_cast<intptr_t>(-2)); }
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uintptr_t m_id;
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};
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struct MinifiedIDHash {
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static unsigned hash(const MinifiedID& key) { return key.hash(); }
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static bool equal(const MinifiedID& a, const MinifiedID& b) { return a == b; }
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static const bool safeToCompareToEmptyOrDeleted = true;
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};
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} } // namespace JSC::DFG
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namespace WTF {
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template<typename T> struct DefaultHash;
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template<> struct DefaultHash<JSC::DFG::MinifiedID> {
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typedef JSC::DFG::MinifiedIDHash Hash;
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};
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template<typename T> struct HashTraits;
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template<> struct HashTraits<JSC::DFG::MinifiedID> : SimpleClassHashTraits<JSC::DFG::MinifiedID> {
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static const bool emptyValueIsZero = false;
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};
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} // namespace WTF
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