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
168
169
|
// 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_TYPE_CACHE_H_
#define V8_COMPILER_TYPE_CACHE_H_
#include "src/compiler/types.h"
#include "src/date.h"
#include "src/objects/string.h"
namespace v8 {
namespace internal {
namespace compiler {
class TypeCache final {
private:
// This has to be first for the initialization magic to work.
AccountingAllocator allocator;
Zone zone_;
public:
static TypeCache const& Get();
TypeCache() : zone_(&allocator, ZONE_NAME) {}
Type* const kInt8 = CreateRange<int8_t>();
Type* const kUint8 = CreateRange<uint8_t>();
Type* const kUint8Clamped = kUint8;
Type* const kUint8OrMinusZeroOrNaN =
Type::Union(kUint8, Type::MinusZeroOrNaN(), zone());
Type* const kInt16 = CreateRange<int16_t>();
Type* const kUint16 = CreateRange<uint16_t>();
Type* const kInt32 = Type::Signed32();
Type* const kUint32 = Type::Unsigned32();
Type* const kFloat32 = Type::Number();
Type* const kFloat64 = Type::Number();
Type* const kHoleySmi =
Type::Union(Type::SignedSmall(), Type::Hole(), zone());
Type* const kSingletonZero = CreateRange(0.0, 0.0);
Type* const kSingletonOne = CreateRange(1.0, 1.0);
Type* const kSingletonTen = CreateRange(10.0, 10.0);
Type* const kSingletonMinusOne = CreateRange(-1.0, -1.0);
Type* const kZeroOrUndefined =
Type::Union(kSingletonZero, Type::Undefined(), zone());
Type* const kTenOrUndefined =
Type::Union(kSingletonTen, Type::Undefined(), zone());
Type* const kMinusOneOrZero = CreateRange(-1.0, 0.0);
Type* const kMinusOneToOneOrMinusZeroOrNaN = Type::Union(
Type::Union(CreateRange(-1.0, 1.0), Type::MinusZero(), zone()),
Type::NaN(), zone());
Type* const kZeroOrOne = CreateRange(0.0, 1.0);
Type* const kZeroOrOneOrNaN = Type::Union(kZeroOrOne, Type::NaN(), zone());
Type* const kZeroToThirtyOne = CreateRange(0.0, 31.0);
Type* const kZeroToThirtyTwo = CreateRange(0.0, 32.0);
Type* const kZeroish =
Type::Union(kSingletonZero, Type::MinusZeroOrNaN(), zone());
Type* const kInteger = CreateRange(-V8_INFINITY, V8_INFINITY);
Type* const kIntegerOrMinusZero =
Type::Union(kInteger, Type::MinusZero(), zone());
Type* const kIntegerOrMinusZeroOrNaN =
Type::Union(kIntegerOrMinusZero, Type::NaN(), zone());
Type* const kPositiveInteger = CreateRange(0.0, V8_INFINITY);
Type* const kPositiveIntegerOrMinusZero =
Type::Union(kPositiveInteger, Type::MinusZero(), zone());
Type* const kPositiveIntegerOrNaN =
Type::Union(kPositiveInteger, Type::NaN(), zone());
Type* const kPositiveIntegerOrMinusZeroOrNaN =
Type::Union(kPositiveIntegerOrMinusZero, Type::NaN(), zone());
Type* const kAdditiveSafeInteger =
CreateRange(-4503599627370496.0, 4503599627370496.0);
Type* const kSafeInteger = CreateRange(-kMaxSafeInteger, kMaxSafeInteger);
Type* const kAdditiveSafeIntegerOrMinusZero =
Type::Union(kAdditiveSafeInteger, Type::MinusZero(), zone());
Type* const kSafeIntegerOrMinusZero =
Type::Union(kSafeInteger, Type::MinusZero(), zone());
Type* const kPositiveSafeInteger = CreateRange(0.0, kMaxSafeInteger);
// The FixedArray::length property always containts a smi in the range
// [0, FixedArray::kMaxLength].
Type* const kFixedArrayLengthType = CreateRange(0.0, FixedArray::kMaxLength);
// The FixedDoubleArray::length property always containts a smi in the range
// [0, FixedDoubleArray::kMaxLength].
Type* const kFixedDoubleArrayLengthType =
CreateRange(0.0, FixedDoubleArray::kMaxLength);
// The JSArray::length property always contains a tagged number in the range
// [0, kMaxUInt32].
Type* const kJSArrayLengthType = Type::Unsigned32();
// The JSTyped::length property always contains a tagged number in the range
// [0, kMaxSmiValue].
Type* const kJSTypedArrayLengthType = Type::UnsignedSmall();
// The String::length property always contains a smi in the range
// [0, String::kMaxLength].
Type* const kStringLengthType = CreateRange(0.0, String::kMaxLength);
// A time value always contains a tagged number in the range
// [-kMaxTimeInMs, kMaxTimeInMs].
Type* const kTimeValueType =
CreateRange(-DateCache::kMaxTimeInMs, DateCache::kMaxTimeInMs);
// The JSDate::day property always contains a tagged number in the range
// [1, 31] or NaN.
Type* const kJSDateDayType =
Type::Union(CreateRange(1, 31.0), Type::NaN(), zone());
// The JSDate::hour property always contains a tagged number in the range
// [0, 23] or NaN.
Type* const kJSDateHourType =
Type::Union(CreateRange(0, 23.0), Type::NaN(), zone());
// The JSDate::minute property always contains a tagged number in the range
// [0, 59] or NaN.
Type* const kJSDateMinuteType =
Type::Union(CreateRange(0, 59.0), Type::NaN(), zone());
// The JSDate::month property always contains a tagged number in the range
// [0, 11] or NaN.
Type* const kJSDateMonthType =
Type::Union(CreateRange(0, 11.0), Type::NaN(), zone());
// The JSDate::second property always contains a tagged number in the range
// [0, 59] or NaN.
Type* const kJSDateSecondType = kJSDateMinuteType;
// The JSDate::value property always contains a tagged number in the range
// [-kMaxTimeInMs, kMaxTimeInMs] or NaN.
Type* const kJSDateValueType =
Type::Union(kTimeValueType, Type::NaN(), zone());
// The JSDate::weekday property always contains a tagged number in the range
// [0, 6] or NaN.
Type* const kJSDateWeekdayType =
Type::Union(CreateRange(0, 6.0), Type::NaN(), zone());
// The JSDate::year property always contains a tagged number in the signed
// small range or NaN.
Type* const kJSDateYearType =
Type::Union(Type::SignedSmall(), Type::NaN(), zone());
// The valid number of arguments for JavaScript functions.
Type* const kArgumentsLengthType =
Type::Range(0.0, Code::kMaxArguments, zone());
private:
template <typename T>
Type* CreateRange() {
return CreateRange(std::numeric_limits<T>::min(),
std::numeric_limits<T>::max());
}
Type* CreateRange(double min, double max) {
return Type::Range(min, max, zone());
}
Zone* zone() { return &zone_; }
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_TYPE_CACHE_H_
|
