// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_COMPILER_TYPE_CACHE_H_
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#define V8_COMPILER_TYPE_CACHE_H_
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#include "src/compiler/types.h"
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#include "src/date.h"
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#include "src/objects/code.h"
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#include "src/objects/string.h"
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namespace v8 {
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namespace internal {
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namespace compiler {
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class TypeCache final {
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private:
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// This has to be first for the initialization magic to work.
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AccountingAllocator allocator;
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Zone zone_;
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public:
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static TypeCache const& Get();
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TypeCache() : zone_(&allocator, ZONE_NAME) {}
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Type const kInt8 = CreateRange<int8_t>();
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Type const kUint8 = CreateRange<uint8_t>();
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Type const kUint8Clamped = kUint8;
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Type const kUint8OrMinusZeroOrNaN =
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Type::Union(kUint8, Type::MinusZeroOrNaN(), zone());
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Type const kInt16 = CreateRange<int16_t>();
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Type const kUint16 = CreateRange<uint16_t>();
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Type const kInt32 = Type::Signed32();
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Type const kUint32 = Type::Unsigned32();
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Type const kFloat32 = Type::Number();
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Type const kFloat64 = Type::Number();
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Type const kBigInt64 = Type::BigInt();
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Type const kBigUint64 = Type::BigInt();
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Type const kHoleySmi = Type::Union(Type::SignedSmall(), Type::Hole(), zone());
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Type const kSingletonZero = CreateRange(0.0, 0.0);
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Type const kSingletonOne = CreateRange(1.0, 1.0);
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Type const kSingletonTen = CreateRange(10.0, 10.0);
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Type const kSingletonMinusOne = CreateRange(-1.0, -1.0);
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Type const kZeroOrMinusZero =
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Type::Union(kSingletonZero, Type::MinusZero(), zone());
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Type const kZeroOrUndefined =
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Type::Union(kSingletonZero, Type::Undefined(), zone());
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Type const kTenOrUndefined =
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Type::Union(kSingletonTen, Type::Undefined(), zone());
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Type const kMinusOneOrZero = CreateRange(-1.0, 0.0);
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Type const kMinusOneToOneOrMinusZeroOrNaN = Type::Union(
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Type::Union(CreateRange(-1.0, 1.0), Type::MinusZero(), zone()),
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Type::NaN(), zone());
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Type const kZeroOrOne = CreateRange(0.0, 1.0);
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Type const kZeroOrOneOrNaN = Type::Union(kZeroOrOne, Type::NaN(), zone());
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Type const kZeroToThirtyOne = CreateRange(0.0, 31.0);
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Type const kZeroToThirtyTwo = CreateRange(0.0, 32.0);
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Type const kZeroish =
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Type::Union(kSingletonZero, Type::MinusZeroOrNaN(), zone());
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Type const kInteger = CreateRange(-V8_INFINITY, V8_INFINITY);
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Type const kIntegerOrMinusZero =
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Type::Union(kInteger, Type::MinusZero(), zone());
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Type const kIntegerOrMinusZeroOrNaN =
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Type::Union(kIntegerOrMinusZero, Type::NaN(), zone());
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Type const kPositiveInteger = CreateRange(0.0, V8_INFINITY);
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Type const kPositiveIntegerOrMinusZero =
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Type::Union(kPositiveInteger, Type::MinusZero(), zone());
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Type const kPositiveIntegerOrNaN =
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Type::Union(kPositiveInteger, Type::NaN(), zone());
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Type const kPositiveIntegerOrMinusZeroOrNaN =
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Type::Union(kPositiveIntegerOrMinusZero, Type::NaN(), zone());
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Type const kAdditiveSafeInteger =
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CreateRange(-4503599627370496.0, 4503599627370496.0);
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Type const kSafeInteger = CreateRange(-kMaxSafeInteger, kMaxSafeInteger);
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Type const kAdditiveSafeIntegerOrMinusZero =
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Type::Union(kAdditiveSafeInteger, Type::MinusZero(), zone());
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Type const kSafeIntegerOrMinusZero =
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Type::Union(kSafeInteger, Type::MinusZero(), zone());
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Type const kPositiveSafeInteger = CreateRange(0.0, kMaxSafeInteger);
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// The FixedArray::length property always containts a smi in the range
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// [0, FixedArray::kMaxLength].
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Type const kFixedArrayLengthType = CreateRange(0.0, FixedArray::kMaxLength);
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// The FixedDoubleArray::length property always containts a smi in the range
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// [0, FixedDoubleArray::kMaxLength].
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Type const kFixedDoubleArrayLengthType =
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CreateRange(0.0, FixedDoubleArray::kMaxLength);
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// The JSArray::length property always contains a tagged number in the range
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// [0, kMaxUInt32].
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Type const kJSArrayLengthType = Type::Unsigned32();
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// The JSTypedArray::length property always contains a tagged number in the
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// range [0, kMaxSmiValue].
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Type const kJSTypedArrayLengthType = Type::UnsignedSmall();
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// The String::length property always contains a smi in the range
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// [0, String::kMaxLength].
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Type const kStringLengthType = CreateRange(0.0, String::kMaxLength);
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// A time value always contains a tagged number in the range
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// [-kMaxTimeInMs, kMaxTimeInMs].
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Type const kTimeValueType =
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CreateRange(-DateCache::kMaxTimeInMs, DateCache::kMaxTimeInMs);
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// The JSDate::day property always contains a tagged number in the range
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// [1, 31] or NaN.
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Type const kJSDateDayType =
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Type::Union(CreateRange(1, 31.0), Type::NaN(), zone());
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// The JSDate::hour property always contains a tagged number in the range
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// [0, 23] or NaN.
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Type const kJSDateHourType =
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Type::Union(CreateRange(0, 23.0), Type::NaN(), zone());
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// The JSDate::minute property always contains a tagged number in the range
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// [0, 59] or NaN.
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Type const kJSDateMinuteType =
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Type::Union(CreateRange(0, 59.0), Type::NaN(), zone());
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// The JSDate::month property always contains a tagged number in the range
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// [0, 11] or NaN.
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Type const kJSDateMonthType =
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Type::Union(CreateRange(0, 11.0), Type::NaN(), zone());
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// The JSDate::second property always contains a tagged number in the range
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// [0, 59] or NaN.
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Type const kJSDateSecondType = kJSDateMinuteType;
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// The JSDate::value property always contains a tagged number in the range
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// [-kMaxTimeInMs, kMaxTimeInMs] or NaN.
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Type const kJSDateValueType =
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Type::Union(kTimeValueType, Type::NaN(), zone());
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// The JSDate::weekday property always contains a tagged number in the range
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// [0, 6] or NaN.
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Type const kJSDateWeekdayType =
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Type::Union(CreateRange(0, 6.0), Type::NaN(), zone());
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// The JSDate::year property always contains a tagged number in the signed
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// small range or NaN.
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Type const kJSDateYearType =
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Type::Union(Type::SignedSmall(), Type::NaN(), zone());
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// The valid number of arguments for JavaScript functions.
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Type const kArgumentsLengthType =
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Type::Range(0.0, Code::kMaxArguments, zone());
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// The JSArrayIterator::kind property always contains an integer in the
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// range [0, 2], representing the possible IterationKinds.
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Type const kJSArrayIteratorKindType = CreateRange(0.0, 2.0);
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private:
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template <typename T>
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Type CreateRange() {
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return CreateRange(std::numeric_limits<T>::min(),
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std::numeric_limits<T>::max());
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}
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Type CreateRange(double min, double max) {
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return Type::Range(min, max, zone());
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}
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Zone* zone() { return &zone_; }
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};
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} // namespace compiler
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} // namespace internal
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} // namespace v8
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#endif // V8_COMPILER_TYPE_CACHE_H_
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