1/*
2 * Copyright (C) 2012, 2014, 2015 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#pragma once
27
28#if ENABLE(DFG_JIT)
29
30#include "DFGMinifiedID.h"
31#include "DFGNodeType.h"
32#include "InlineCallFrame.h"
33#include "JSCJSValue.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 PhantomDirectArguments:
46 case PhantomClonedArguments:
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 hasConstant(m_op); }
63
64 JSValue constant() const
65 {
66 return JSValue::decode(bitwise_cast<EncodedJSValue>(m_info));
67 }
68
69 bool hasInlineCallFrame() const { return hasInlineCallFrame(m_op); }
70
71 InlineCallFrame* inlineCallFrame() const
72 {
73 return bitwise_cast<InlineCallFrame*>(static_cast<uintptr_t>(m_info));
74 }
75
76 static MinifiedID getID(MinifiedNode* node) { return node->id(); }
77 static bool compareByNodeIndex(const MinifiedNode& a, const MinifiedNode& b)
78 {
79 return a.m_id < b.m_id;
80 }
81
82private:
83 static bool hasConstant(NodeType type)
84 {
85 return type == JSConstant || type == Int52Constant || type == DoubleConstant;
86 }
87
88 static bool hasInlineCallFrame(NodeType type)
89 {
90 return type == PhantomDirectArguments || type == PhantomClonedArguments;
91 }
92
93 MinifiedID m_id;
94 uint64_t m_info;
95 NodeType m_op;
96};
97
98} } // namespace JSC::DFG
99
100#endif // ENABLE(DFG_JIT)
101