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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_COMPILER_JS_GRAPH_H_
#define V8_COMPILER_JS_GRAPH_H_
#include "src/compiler/common-node-cache.h"
#include "src/compiler/common-operator.h"
#include "src/compiler/graph.h"
#include "src/compiler/js-operator.h"
#include "src/compiler/machine-operator.h"
#include "src/compiler/node-properties.h"
namespace v8 {
namespace internal {
namespace compiler {
class Typer;
// Implements a facade on a Graph, enhancing the graph with JS-specific
// notions, including a builder for for JS* operators, canonicalized global
// constants, and various helper methods.
class JSGraph : public ZoneObject {
public:
JSGraph(Isolate* isolate, Graph* graph, CommonOperatorBuilder* common,
JSOperatorBuilder* javascript, MachineOperatorBuilder* machine)
: isolate_(isolate),
graph_(graph),
common_(common),
javascript_(javascript),
machine_(machine),
cache_(zone()) {
for (int i = 0; i < kNumCachedNodes; i++) cached_nodes_[i] = nullptr;
}
// Canonicalized global constants.
Node* CEntryStubConstant(int result_size);
Node* UndefinedConstant();
Node* TheHoleConstant();
Node* TrueConstant();
Node* FalseConstant();
Node* NullConstant();
Node* ZeroConstant();
Node* OneConstant();
Node* NaNConstant();
// Creates a HeapConstant node, possibly canonicalized, without inspecting the
// object.
Node* HeapConstant(Unique<HeapObject> value);
// Creates a HeapConstant node, possibly canonicalized, and may access the
// heap to inspect the object.
Node* HeapConstant(Handle<HeapObject> value);
// Creates a Constant node of the appropriate type for the given object.
// Accesses the heap to inspect the object and determine whether one of the
// canonicalized globals or a number constant should be returned.
Node* Constant(Handle<Object> value);
// Creates a NumberConstant node, usually canonicalized.
Node* Constant(double value);
// Creates a NumberConstant node, usually canonicalized.
Node* Constant(int32_t value);
// Creates a Int32Constant node, usually canonicalized.
Node* Int32Constant(int32_t value);
Node* Uint32Constant(uint32_t value) {
return Int32Constant(bit_cast<int32_t>(value));
}
// Creates a HeapConstant node for either true or false.
Node* BooleanConstant(bool is_true) {
return is_true ? TrueConstant() : FalseConstant();
}
// Creates a Int64Constant node, usually canonicalized.
Node* Int64Constant(int64_t value);
Node* Uint64Constant(uint64_t value) {
return Int64Constant(bit_cast<int64_t>(value));
}
// Creates a Int32Constant/Int64Constant node, depending on the word size of
// the target machine.
// TODO(turbofan): Code using Int32Constant/Int64Constant to store pointer
// constants is probably not serializable.
Node* IntPtrConstant(intptr_t value) {
return machine()->Is32() ? Int32Constant(static_cast<int32_t>(value))
: Int64Constant(static_cast<int64_t>(value));
}
template <typename T>
Node* PointerConstant(T* value) {
return IntPtrConstant(bit_cast<intptr_t>(value));
}
// Creates a Float32Constant node, usually canonicalized.
Node* Float32Constant(float value);
// Creates a Float64Constant node, usually canonicalized.
Node* Float64Constant(double value);
// Creates an ExternalConstant node, usually canonicalized.
Node* ExternalConstant(ExternalReference ref);
Node* ExternalConstant(Runtime::FunctionId function_id);
Node* SmiConstant(int32_t immediate) {
DCHECK(Smi::IsValid(immediate));
return Constant(immediate);
}
// Creates a dummy Constant node, used to satisfy calling conventions of
// stubs and runtime functions that do not require a context.
Node* NoContextConstant() { return ZeroConstant(); }
// Creates an empty frame states for cases where we know that a function
// cannot deopt.
Node* EmptyFrameState();
// Create a control node that serves as dependency for dead nodes.
Node* Dead();
JSOperatorBuilder* javascript() const { return javascript_; }
CommonOperatorBuilder* common() const { return common_; }
MachineOperatorBuilder* machine() const { return machine_; }
Graph* graph() const { return graph_; }
Zone* zone() const { return graph()->zone(); }
Isolate* isolate() const { return isolate_; }
Factory* factory() const { return isolate()->factory(); }
void GetCachedNodes(NodeVector* nodes);
private:
enum CachedNode {
kCEntryStubConstant,
kUndefinedConstant,
kTheHoleConstant,
kTrueConstant,
kFalseConstant,
kNullConstant,
kZeroConstant,
kOneConstant,
kNaNConstant,
kEmptyFrameState,
kDead,
kNumCachedNodes // Must remain last.
};
Isolate* isolate_;
Graph* graph_;
CommonOperatorBuilder* common_;
JSOperatorBuilder* javascript_;
MachineOperatorBuilder* machine_;
CommonNodeCache cache_;
Node* cached_nodes_[kNumCachedNodes];
Node* ImmovableHeapConstant(Handle<HeapObject> value);
Node* NumberConstant(double value);
DISALLOW_COPY_AND_ASSIGN(JSGraph);
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif
|
