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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 :
11 : namespace v8 {
12 : namespace internal {
13 : namespace compiler {
14 :
15 : class TypeCache final {
16 : private:
17 : // This has to be first for the initialization magic to work.
18 : AccountingAllocator allocator;
19 : Zone zone_;
20 :
21 : public:
22 : static TypeCache const& Get();
23 :
24 698265 : TypeCache() : zone_(&allocator, ZONE_NAME) {}
25 :
26 : Type* const kInt8 = CreateRange<int8_t>();
27 : Type* const kUint8 = CreateRange<uint8_t>();
28 : Type* const kUint8Clamped = kUint8;
29 : Type* const kUint8OrMinusZeroOrNaN =
30 15517 : Type::Union(kUint8, Type::MinusZeroOrNaN(), zone());
31 : Type* const kInt16 = CreateRange<int16_t>();
32 : Type* const kUint16 = CreateRange<uint16_t>();
33 : Type* const kInt32 = Type::Signed32();
34 : Type* const kUint32 = Type::Unsigned32();
35 : Type* const kFloat32 = Type::Number();
36 : Type* const kFloat64 = Type::Number();
37 :
38 : Type* const kHoleySmi =
39 15517 : Type::Union(Type::SignedSmall(), Type::Hole(), zone());
40 :
41 : Type* const kSingletonZero = CreateRange(0.0, 0.0);
42 : Type* const kSingletonOne = CreateRange(1.0, 1.0);
43 : Type* const kSingletonTen = CreateRange(10.0, 10.0);
44 : Type* const kSingletonMinusOne = CreateRange(-1.0, -1.0);
45 : Type* const kZeroOrUndefined =
46 15517 : Type::Union(kSingletonZero, Type::Undefined(), zone());
47 : Type* const kTenOrUndefined =
48 15517 : Type::Union(kSingletonTen, Type::Undefined(), zone());
49 : Type* const kMinusOneOrZero = CreateRange(-1.0, 0.0);
50 : Type* const kMinusOneToOneOrMinusZeroOrNaN = Type::Union(
51 : Type::Union(CreateRange(-1.0, 1.0), Type::MinusZero(), zone()),
52 15517 : Type::NaN(), zone());
53 : Type* const kZeroOrOne = CreateRange(0.0, 1.0);
54 15517 : Type* const kZeroOrOneOrNaN = Type::Union(kZeroOrOne, Type::NaN(), zone());
55 : Type* const kZeroToThirtyOne = CreateRange(0.0, 31.0);
56 : Type* const kZeroToThirtyTwo = CreateRange(0.0, 32.0);
57 : Type* const kZeroish =
58 15517 : Type::Union(kSingletonZero, Type::MinusZeroOrNaN(), zone());
59 : Type* const kInteger = CreateRange(-V8_INFINITY, V8_INFINITY);
60 : Type* const kIntegerOrMinusZero =
61 15517 : Type::Union(kInteger, Type::MinusZero(), zone());
62 : Type* const kIntegerOrMinusZeroOrNaN =
63 15517 : Type::Union(kIntegerOrMinusZero, Type::NaN(), zone());
64 : Type* const kPositiveInteger = CreateRange(0.0, V8_INFINITY);
65 : Type* const kPositiveIntegerOrMinusZero =
66 15517 : Type::Union(kPositiveInteger, Type::MinusZero(), zone());
67 : Type* const kPositiveIntegerOrNaN =
68 15517 : Type::Union(kPositiveInteger, Type::NaN(), zone());
69 : Type* const kPositiveIntegerOrMinusZeroOrNaN =
70 15517 : Type::Union(kPositiveIntegerOrMinusZero, Type::NaN(), zone());
71 :
72 : Type* const kAdditiveSafeInteger =
73 : CreateRange(-4503599627370496.0, 4503599627370496.0);
74 : Type* const kSafeInteger = CreateRange(-kMaxSafeInteger, kMaxSafeInteger);
75 : Type* const kAdditiveSafeIntegerOrMinusZero =
76 15517 : Type::Union(kAdditiveSafeInteger, Type::MinusZero(), zone());
77 : Type* const kSafeIntegerOrMinusZero =
78 15517 : Type::Union(kSafeInteger, Type::MinusZero(), zone());
79 : Type* const kPositiveSafeInteger = CreateRange(0.0, kMaxSafeInteger);
80 :
81 : // The FixedArray::length property always containts a smi in the range
82 : // [0, FixedArray::kMaxLength].
83 : Type* const kFixedArrayLengthType = CreateRange(0.0, FixedArray::kMaxLength);
84 :
85 : // The FixedDoubleArray::length property always containts a smi in the range
86 : // [0, FixedDoubleArray::kMaxLength].
87 : Type* const kFixedDoubleArrayLengthType =
88 : CreateRange(0.0, FixedDoubleArray::kMaxLength);
89 :
90 : // The JSArray::length property always contains a tagged number in the range
91 : // [0, kMaxUInt32].
92 : Type* const kJSArrayLengthType = Type::Unsigned32();
93 :
94 : // The JSTyped::length property always contains a tagged number in the range
95 : // [0, kMaxSmiValue].
96 : Type* const kJSTypedArrayLengthType = Type::UnsignedSmall();
97 :
98 : // The String::length property always contains a smi in the range
99 : // [0, String::kMaxLength].
100 : Type* const kStringLengthType = CreateRange(0.0, String::kMaxLength);
101 :
102 : // A time value always contains a tagged number in the range
103 : // [-kMaxTimeInMs, kMaxTimeInMs].
104 : Type* const kTimeValueType =
105 : CreateRange(-DateCache::kMaxTimeInMs, DateCache::kMaxTimeInMs);
106 :
107 : // The JSDate::day property always contains a tagged number in the range
108 : // [1, 31] or NaN.
109 : Type* const kJSDateDayType =
110 15517 : Type::Union(CreateRange(1, 31.0), Type::NaN(), zone());
111 :
112 : // The JSDate::hour property always contains a tagged number in the range
113 : // [0, 23] or NaN.
114 : Type* const kJSDateHourType =
115 15517 : Type::Union(CreateRange(0, 23.0), Type::NaN(), zone());
116 :
117 : // The JSDate::minute property always contains a tagged number in the range
118 : // [0, 59] or NaN.
119 : Type* const kJSDateMinuteType =
120 15517 : Type::Union(CreateRange(0, 59.0), Type::NaN(), zone());
121 :
122 : // The JSDate::month property always contains a tagged number in the range
123 : // [0, 11] or NaN.
124 : Type* const kJSDateMonthType =
125 15517 : Type::Union(CreateRange(0, 11.0), Type::NaN(), zone());
126 :
127 : // The JSDate::second property always contains a tagged number in the range
128 : // [0, 59] or NaN.
129 : Type* const kJSDateSecondType = kJSDateMinuteType;
130 :
131 : // The JSDate::value property always contains a tagged number in the range
132 : // [-kMaxTimeInMs, kMaxTimeInMs] or NaN.
133 : Type* const kJSDateValueType =
134 15517 : Type::Union(kTimeValueType, Type::NaN(), zone());
135 :
136 : // The JSDate::weekday property always contains a tagged number in the range
137 : // [0, 6] or NaN.
138 : Type* const kJSDateWeekdayType =
139 15517 : Type::Union(CreateRange(0, 6.0), Type::NaN(), zone());
140 :
141 : // The JSDate::year property always contains a tagged number in the signed
142 : // small range or NaN.
143 : Type* const kJSDateYearType =
144 15517 : Type::Union(Type::SignedSmall(), Type::NaN(), zone());
145 :
146 : // The valid number of arguments for JavaScript functions.
147 : Type* const kArgumentsLengthType =
148 : Type::Range(0.0, Code::kMaxArguments, zone());
149 :
150 : private:
151 : template <typename T>
152 : Type* CreateRange() {
153 : return CreateRange(std::numeric_limits<T>::min(),
154 : std::numeric_limits<T>::max());
155 : }
156 :
157 : Type* CreateRange(double min, double max) {
158 : return Type::Range(min, max, zone());
159 : }
160 :
161 : Zone* zone() { return &zone_; }
162 : };
163 :
164 : } // namespace compiler
165 : } // namespace internal
166 : } // namespace v8
167 :
168 : #endif // V8_COMPILER_TYPE_CACHE_H_
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