-
Notifications
You must be signed in to change notification settings - Fork 1.4k
/
DFGNodeOrigin.h
131 lines (109 loc) · 3.72 KB
/
DFGNodeOrigin.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
/*
* Copyright (C) 2014-2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(DFG_JIT)
#include "CodeOrigin.h"
#include "DFGClobbersExitState.h"
namespace JSC { namespace DFG {
class Graph;
struct Node;
struct NodeOrigin {
NodeOrigin() { }
NodeOrigin(CodeOrigin semantic, CodeOrigin forExit, bool exitOK)
: semantic(semantic)
, forExit(forExit)
, exitOK(exitOK)
{
}
bool isSet() const
{
ASSERT(semantic.isSet() == forExit.isSet());
return semantic.isSet();
}
NodeOrigin withSemantic(CodeOrigin semantic) const
{
if (!isSet())
return NodeOrigin();
NodeOrigin result = *this;
if (semantic.isSet())
result.semantic = semantic;
return result;
}
NodeOrigin withForExitAndExitOK(CodeOrigin forExit, bool exitOK) const
{
if (!isSet())
return NodeOrigin();
NodeOrigin result = *this;
if (forExit.isSet())
result.forExit = forExit;
result.exitOK = exitOK;
return result;
}
NodeOrigin withExitOK(bool value) const
{
NodeOrigin result = *this;
result.exitOK = value;
return result;
}
NodeOrigin withInvalidExit() const
{
return withExitOK(false);
}
NodeOrigin takeValidExit(bool& canExit) const
{
return withExitOK(exitOK & std::exchange(canExit, false));
}
NodeOrigin withWasHoisted() const
{
NodeOrigin result = *this;
result.wasHoisted = true;
return result;
}
NodeOrigin forInsertingAfter(Graph& graph, Node* node) const
{
NodeOrigin result = *this;
if (exitOK && clobbersExitState(graph, node))
result.exitOK = false;
return result;
}
bool operator==(const NodeOrigin& other) const
{
return semantic == other.semantic
&& forExit == other.forExit
&& exitOK == other.exitOK;
}
void dump(PrintStream&) const;
// Used for determining what bytecode this came from. This is important for
// debugging, exceptions, and even basic execution semantics.
CodeOrigin semantic;
// Code origin for where the node exits to.
CodeOrigin forExit;
// Whether or not it is legal to exit here.
bool exitOK { false };
// Whether or not the node has been hoisted.
bool wasHoisted { false };
};
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)