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 TypeCache()24 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 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 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 Type::Union(kSingletonZero, Type::Undefined(), zone()); 47 Type* const kTenOrUndefined = 48 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 Type::NaN(), zone()); 53 Type* const kZeroOrOne = CreateRange(0.0, 1.0); 54 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 Type::Union(kSingletonZero, Type::MinusZeroOrNaN(), zone()); 59 Type* const kInteger = CreateRange(-V8_INFINITY, V8_INFINITY); 60 Type* const kIntegerOrMinusZero = 61 Type::Union(kInteger, Type::MinusZero(), zone()); 62 Type* const kIntegerOrMinusZeroOrNaN = 63 Type::Union(kIntegerOrMinusZero, Type::NaN(), zone()); 64 Type* const kPositiveInteger = CreateRange(0.0, V8_INFINITY); 65 Type* const kPositiveIntegerOrMinusZero = 66 Type::Union(kPositiveInteger, Type::MinusZero(), zone()); 67 Type* const kPositiveIntegerOrMinusZeroOrNaN = 68 Type::Union(kPositiveIntegerOrMinusZero, Type::NaN(), zone()); 69 70 Type* const kAdditiveSafeInteger = 71 CreateRange(-4503599627370496.0, 4503599627370496.0); 72 Type* const kSafeInteger = CreateRange(-kMaxSafeInteger, kMaxSafeInteger); 73 Type* const kAdditiveSafeIntegerOrMinusZero = 74 Type::Union(kAdditiveSafeInteger, Type::MinusZero(), zone()); 75 Type* const kSafeIntegerOrMinusZero = 76 Type::Union(kSafeInteger, Type::MinusZero(), zone()); 77 Type* const kPositiveSafeInteger = CreateRange(0.0, kMaxSafeInteger); 78 79 // The FixedArray::length property always containts a smi in the range 80 // [0, FixedArray::kMaxLength]. 81 Type* const kFixedArrayLengthType = CreateRange(0.0, FixedArray::kMaxLength); 82 83 // The FixedDoubleArray::length property always containts a smi in the range 84 // [0, FixedDoubleArray::kMaxLength]. 85 Type* const kFixedDoubleArrayLengthType = 86 CreateRange(0.0, FixedDoubleArray::kMaxLength); 87 88 // The JSArray::length property always contains a tagged number in the range 89 // [0, kMaxUInt32]. 90 Type* const kJSArrayLengthType = Type::Unsigned32(); 91 92 // The JSTyped::length property always contains a tagged number in the range 93 // [0, kMaxSmiValue]. 94 Type* const kJSTypedArrayLengthType = Type::UnsignedSmall(); 95 96 // The String::length property always contains a smi in the range 97 // [0, String::kMaxLength]. 98 Type* const kStringLengthType = CreateRange(0.0, String::kMaxLength); 99 100 // The JSDate::day property always contains a tagged number in the range 101 // [1, 31] or NaN. 102 Type* const kJSDateDayType = 103 Type::Union(CreateRange(1, 31.0), Type::NaN(), zone()); 104 105 // The JSDate::hour property always contains a tagged number in the range 106 // [0, 23] or NaN. 107 Type* const kJSDateHourType = 108 Type::Union(CreateRange(0, 23.0), Type::NaN(), zone()); 109 110 // The JSDate::minute property always contains a tagged number in the range 111 // [0, 59] or NaN. 112 Type* const kJSDateMinuteType = 113 Type::Union(CreateRange(0, 59.0), Type::NaN(), zone()); 114 115 // The JSDate::month property always contains a tagged number in the range 116 // [0, 11] or NaN. 117 Type* const kJSDateMonthType = 118 Type::Union(CreateRange(0, 11.0), Type::NaN(), zone()); 119 120 // The JSDate::second property always contains a tagged number in the range 121 // [0, 59] or NaN. 122 Type* const kJSDateSecondType = kJSDateMinuteType; 123 124 // The JSDate::value property always contains a tagged number in the range 125 // [-kMaxTimeInMs, kMaxTimeInMs] or NaN. 126 Type* const kJSDateValueType = Type::Union( 127 CreateRange(-DateCache::kMaxTimeInMs, DateCache::kMaxTimeInMs), 128 Type::NaN(), zone()); 129 130 // The JSDate::weekday property always contains a tagged number in the range 131 // [0, 6] or NaN. 132 Type* const kJSDateWeekdayType = 133 Type::Union(CreateRange(0, 6.0), Type::NaN(), zone()); 134 135 // The JSDate::year property always contains a tagged number in the signed 136 // small range or NaN. 137 Type* const kJSDateYearType = 138 Type::Union(Type::SignedSmall(), Type::NaN(), zone()); 139 140 private: 141 template <typename T> CreateRange()142 Type* CreateRange() { 143 return CreateRange(std::numeric_limits<T>::min(), 144 std::numeric_limits<T>::max()); 145 } 146 CreateRange(double min,double max)147 Type* CreateRange(double min, double max) { 148 return Type::Range(min, max, zone()); 149 } 150 zone()151 Zone* zone() { return &zone_; } 152 }; 153 154 } // namespace compiler 155 } // namespace internal 156 } // namespace v8 157 158 #endif // V8_COMPILER_TYPE_CACHE_H_ 159