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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_ZONE_TYPE_CACHE_H_ | |
| 6 #define V8_ZONE_TYPE_CACHE_H_ | |
| 7 | |
| 8 | |
| 9 #include "src/types.h" | |
| 10 | |
| 11 namespace v8 { | |
| 12 namespace internal { | |
| 13 | |
| 14 class ZoneTypeCache final { | |
| 15 private: | |
| 16 // This has to be first for the initialization magic to work. | |
| 17 Zone zone_; | |
| 18 | |
| 19 public: | |
| 20 ZoneTypeCache() = default; | |
| 21 | |
| 22 Type* const kInt8 = | |
| 23 CreateNative(CreateRange<int8_t>(), Type::UntaggedSigned8()); | |
| 24 Type* const kUint8 = | |
| 25 CreateNative(CreateRange<uint8_t>(), Type::UntaggedUnsigned8()); | |
| 26 Type* const kUint8Clamped = kUint8; | |
| 27 Type* const kInt16 = | |
| 28 CreateNative(CreateRange<int16_t>(), Type::UntaggedSigned16()); | |
| 29 Type* const kUint16 = | |
| 30 CreateNative(CreateRange<uint16_t>(), Type::UntaggedUnsigned16()); | |
| 31 Type* const kInt32 = CreateNative(Type::Signed32(), Type::UntaggedSigned32()); | |
| 32 Type* const kUint32 = | |
| 33 CreateNative(Type::Unsigned32(), Type::UntaggedUnsigned32()); | |
| 34 Type* const kFloat32 = CreateNative(Type::Number(), Type::UntaggedFloat32()); | |
| 35 Type* const kFloat64 = CreateNative(Type::Number(), Type::UntaggedFloat64()); | |
| 36 | |
| 37 Type* const kSingletonZero = CreateRange(0.0, 0.0); | |
| 38 Type* const kSingletonOne = CreateRange(1.0, 1.0); | |
| 39 Type* const kZeroOrOne = CreateRange(0.0, 1.0); | |
| 40 Type* const kZeroToThirtyTwo = CreateRange(0.0, 32.0); | |
| 41 Type* const kZeroish = | |
| 42 Type::Union(kSingletonZero, Type::MinusZeroOrNaN(), zone()); | |
| 43 Type* const kInteger = CreateRange(-V8_INFINITY, V8_INFINITY); | |
| 44 Type* const kWeakint = Type::Union(kInteger, Type::MinusZeroOrNaN(), zone()); | |
| 45 | |
| 46 #define TYPED_ARRAY(TypeName, type_name, TYPE_NAME, ctype, size) \ | |
| 47 Type* const k##TypeName##Array = CreateArray(k##TypeName); | |
| 48 TYPED_ARRAYS(TYPED_ARRAY) | |
| 49 #undef TYPED_ARRAY | |
| 50 | |
| 51 private: | |
| 52 Type* CreateArray(Type* element) { return Type::Array(element, zone()); } | |
| 53 | |
| 54 Type* CreateArrayFunction(Type* array) { | |
| 55 Type* arg1 = Type::Union(Type::Unsigned32(), Type::Object(), zone()); | |
| 56 Type* arg2 = Type::Union(Type::Unsigned32(), Type::Undefined(), zone()); | |
| 57 Type* arg3 = arg2; | |
| 58 return Type::Function(array, arg1, arg2, arg3, zone()); | |
| 59 } | |
| 60 | |
| 61 Type* CreateNative(Type* semantic, Type* representation) { | |
| 62 return Type::Intersect(semantic, representation, zone()); | |
| 63 } | |
| 64 | |
| 65 template <typename T> | |
| 66 Type* CreateRange() { | |
| 67 return CreateRange(std::numeric_limits<T>::min(), | |
| 68 std::numeric_limits<T>::max()); | |
| 69 } | |
| 70 | |
| 71 Type* CreateRange(double min, double max) { | |
| 72 return Type::Range(min, max, zone()); | |
| 73 } | |
| 74 | |
| 75 Zone* zone() { return &zone_; } | |
| 76 }; | |
| 77 | |
| 78 } // namespace internal | |
| 79 } // namespace v8 | |
| 80 | |
| 81 #endif // V8_ZONE_TYPE_CACHE_H_ | |
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