Line data Source code
1 : // Copyright 2014 the V8 project authors. All rights reserved.
2 : // Use of this source code is governed by a BSD-style license that can be
3 : // found in the LICENSE file.
4 :
5 : #ifndef V8_COMPILER_TYPE_CACHE_H_
6 : #define V8_COMPILER_TYPE_CACHE_H_
7 :
8 : #include "src/compiler/types.h"
9 : #include "src/date.h"
10 : #include "src/objects/code.h"
11 : #include "src/objects/string.h"
12 :
13 : namespace v8 {
14 : namespace internal {
15 : namespace compiler {
16 :
17 : class TypeCache final {
18 : private:
19 : // This has to be first for the initialization magic to work.
20 : AccountingAllocator allocator;
21 : Zone zone_;
22 :
23 : public:
24 : static TypeCache const& Get();
25 :
26 623340 : TypeCache() : zone_(&allocator, ZONE_NAME) {}
27 :
28 : Type* const kInt8 = CreateRange<int8_t>();
29 : Type* const kUint8 = CreateRange<uint8_t>();
30 : Type* const kUint8Clamped = kUint8;
31 : Type* const kUint8OrMinusZeroOrNaN =
32 13852 : Type::Union(kUint8, Type::MinusZeroOrNaN(), zone());
33 : Type* const kInt16 = CreateRange<int16_t>();
34 : Type* const kUint16 = CreateRange<uint16_t>();
35 : Type* const kInt32 = Type::Signed32();
36 : Type* const kUint32 = Type::Unsigned32();
37 : Type* const kFloat32 = Type::Number();
38 : Type* const kFloat64 = Type::Number();
39 :
40 : Type* const kHoleySmi =
41 13852 : Type::Union(Type::SignedSmall(), Type::Hole(), zone());
42 :
43 : Type* const kSingletonZero = CreateRange(0.0, 0.0);
44 : Type* const kSingletonOne = CreateRange(1.0, 1.0);
45 : Type* const kSingletonTen = CreateRange(10.0, 10.0);
46 : Type* const kSingletonMinusOne = CreateRange(-1.0, -1.0);
47 : Type* const kZeroOrUndefined =
48 13852 : Type::Union(kSingletonZero, Type::Undefined(), zone());
49 : Type* const kTenOrUndefined =
50 13852 : Type::Union(kSingletonTen, Type::Undefined(), zone());
51 : Type* const kMinusOneOrZero = CreateRange(-1.0, 0.0);
52 : Type* const kMinusOneToOneOrMinusZeroOrNaN = Type::Union(
53 : Type::Union(CreateRange(-1.0, 1.0), Type::MinusZero(), zone()),
54 13852 : Type::NaN(), zone());
55 : Type* const kZeroOrOne = CreateRange(0.0, 1.0);
56 13852 : Type* const kZeroOrOneOrNaN = Type::Union(kZeroOrOne, Type::NaN(), zone());
57 : Type* const kZeroToThirtyOne = CreateRange(0.0, 31.0);
58 : Type* const kZeroToThirtyTwo = CreateRange(0.0, 32.0);
59 : Type* const kZeroish =
60 13852 : Type::Union(kSingletonZero, Type::MinusZeroOrNaN(), zone());
61 : Type* const kInteger = CreateRange(-V8_INFINITY, V8_INFINITY);
62 : Type* const kIntegerOrMinusZero =
63 13852 : Type::Union(kInteger, Type::MinusZero(), zone());
64 : Type* const kIntegerOrMinusZeroOrNaN =
65 13852 : Type::Union(kIntegerOrMinusZero, Type::NaN(), zone());
66 : Type* const kPositiveInteger = CreateRange(0.0, V8_INFINITY);
67 : Type* const kPositiveIntegerOrMinusZero =
68 13852 : Type::Union(kPositiveInteger, Type::MinusZero(), zone());
69 : Type* const kPositiveIntegerOrNaN =
70 13852 : Type::Union(kPositiveInteger, Type::NaN(), zone());
71 : Type* const kPositiveIntegerOrMinusZeroOrNaN =
72 13852 : Type::Union(kPositiveIntegerOrMinusZero, Type::NaN(), zone());
73 :
74 : Type* const kAdditiveSafeInteger =
75 : CreateRange(-4503599627370496.0, 4503599627370496.0);
76 : Type* const kSafeInteger = CreateRange(-kMaxSafeInteger, kMaxSafeInteger);
77 : Type* const kAdditiveSafeIntegerOrMinusZero =
78 13852 : Type::Union(kAdditiveSafeInteger, Type::MinusZero(), zone());
79 : Type* const kSafeIntegerOrMinusZero =
80 13852 : Type::Union(kSafeInteger, Type::MinusZero(), zone());
81 : Type* const kPositiveSafeInteger = CreateRange(0.0, kMaxSafeInteger);
82 :
83 : // The FixedArray::length property always containts a smi in the range
84 : // [0, FixedArray::kMaxLength].
85 : Type* const kFixedArrayLengthType = CreateRange(0.0, FixedArray::kMaxLength);
86 :
87 : // The FixedDoubleArray::length property always containts a smi in the range
88 : // [0, FixedDoubleArray::kMaxLength].
89 : Type* const kFixedDoubleArrayLengthType =
90 : CreateRange(0.0, FixedDoubleArray::kMaxLength);
91 :
92 : // The JSArray::length property always contains a tagged number in the range
93 : // [0, kMaxUInt32].
94 : Type* const kJSArrayLengthType = Type::Unsigned32();
95 :
96 : // The JSTyped::length property always contains a tagged number in the range
97 : // [0, kMaxSmiValue].
98 : Type* const kJSTypedArrayLengthType = Type::UnsignedSmall();
99 :
100 : // The String::length property always contains a smi in the range
101 : // [0, String::kMaxLength].
102 : Type* const kStringLengthType = CreateRange(0.0, String::kMaxLength);
103 :
104 : // A time value always contains a tagged number in the range
105 : // [-kMaxTimeInMs, kMaxTimeInMs].
106 : Type* const kTimeValueType =
107 : CreateRange(-DateCache::kMaxTimeInMs, DateCache::kMaxTimeInMs);
108 :
109 : // The JSDate::day property always contains a tagged number in the range
110 : // [1, 31] or NaN.
111 : Type* const kJSDateDayType =
112 13852 : Type::Union(CreateRange(1, 31.0), Type::NaN(), zone());
113 :
114 : // The JSDate::hour property always contains a tagged number in the range
115 : // [0, 23] or NaN.
116 : Type* const kJSDateHourType =
117 13852 : Type::Union(CreateRange(0, 23.0), Type::NaN(), zone());
118 :
119 : // The JSDate::minute property always contains a tagged number in the range
120 : // [0, 59] or NaN.
121 : Type* const kJSDateMinuteType =
122 13852 : Type::Union(CreateRange(0, 59.0), Type::NaN(), zone());
123 :
124 : // The JSDate::month property always contains a tagged number in the range
125 : // [0, 11] or NaN.
126 : Type* const kJSDateMonthType =
127 13852 : Type::Union(CreateRange(0, 11.0), Type::NaN(), zone());
128 :
129 : // The JSDate::second property always contains a tagged number in the range
130 : // [0, 59] or NaN.
131 : Type* const kJSDateSecondType = kJSDateMinuteType;
132 :
133 : // The JSDate::value property always contains a tagged number in the range
134 : // [-kMaxTimeInMs, kMaxTimeInMs] or NaN.
135 : Type* const kJSDateValueType =
136 13852 : Type::Union(kTimeValueType, Type::NaN(), zone());
137 :
138 : // The JSDate::weekday property always contains a tagged number in the range
139 : // [0, 6] or NaN.
140 : Type* const kJSDateWeekdayType =
141 13852 : Type::Union(CreateRange(0, 6.0), Type::NaN(), zone());
142 :
143 : // The JSDate::year property always contains a tagged number in the signed
144 : // small range or NaN.
145 : Type* const kJSDateYearType =
146 13852 : Type::Union(Type::SignedSmall(), Type::NaN(), zone());
147 :
148 : // The valid number of arguments for JavaScript functions.
149 : Type* const kArgumentsLengthType =
150 : Type::Range(0.0, Code::kMaxArguments, zone());
151 :
152 : private:
153 : template <typename T>
154 : Type* CreateRange() {
155 : return CreateRange(std::numeric_limits<T>::min(),
156 : std::numeric_limits<T>::max());
157 : }
158 :
159 : Type* CreateRange(double min, double max) {
160 : return Type::Range(min, max, zone());
161 : }
162 :
163 : Zone* zone() { return &zone_; }
164 : };
165 :
166 : } // namespace compiler
167 : } // namespace internal
168 : } // namespace v8
169 :
170 : #endif // V8_COMPILER_TYPE_CACHE_H_
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