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