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