1/* 2 * Copyright (C) 2012 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef DFGMinifiedNode_h 27#define DFGMinifiedNode_h 28 29#if ENABLE(DFG_JIT) 30 31#include "DFGCommon.h" 32#include "DFGMinifiedID.h" 33#include "DFGNodeType.h" 34 35namespace JSC { namespace DFG { 36 37struct Node; 38 39inline bool belongsInMinifiedGraph(NodeType type) 40{ 41 switch (type) { 42 case JSConstant: 43 case Int52Constant: 44 case DoubleConstant: 45 case WeakJSConstant: 46 case PhantomArguments: 47 return true; 48 default: 49 return false; 50 } 51} 52 53class MinifiedNode { 54public: 55 MinifiedNode() { } 56 57 static MinifiedNode fromNode(Node*); 58 59 MinifiedID id() const { return m_id; } 60 NodeType op() const { return m_op; } 61 62 bool hasConstant() const { return hasConstantNumber() || hasWeakConstant(); } 63 64 bool hasConstantNumber() const { return hasConstantNumber(m_op); } 65 66 unsigned constantNumber() const 67 { 68 ASSERT(hasConstantNumber(m_op)); 69 return m_info; 70 } 71 72 bool hasWeakConstant() const { return hasWeakConstant(m_op); } 73 74 JSCell* weakConstant() const 75 { 76 ASSERT(hasWeakConstant(m_op)); 77 return bitwise_cast<JSCell*>(m_info); 78 } 79 80 static MinifiedID getID(MinifiedNode* node) { return node->id(); } 81 static bool compareByNodeIndex(const MinifiedNode& a, const MinifiedNode& b) 82 { 83 return a.m_id < b.m_id; 84 } 85 86private: 87 static bool hasConstantNumber(NodeType type) 88 { 89 return type == JSConstant || type == Int52Constant || type == DoubleConstant; 90 } 91 static bool hasWeakConstant(NodeType type) 92 { 93 return type == WeakJSConstant; 94 } 95 96 MinifiedID m_id; 97 uintptr_t m_info; 98 NodeType m_op; 99}; 100 101} } // namespace JSC::DFG 102 103#endif // ENABLE(DFG_JIT) 104 105#endif // DFGMinifiedNode_h 106 107