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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.
#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 {
// This has to be first for the initialization magic to work.
AccountingAllocator allocator;
Zone zone_;
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 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 JSTyped::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());
template <typename T>
Type* CreateRange() {
return CreateRange(std::numeric_limits<T>::min(),
Type* CreateRange(double min, double max) {
return Type::Range(min, max, zone());
Zone* zone() { return &zone_; }
} // namespace compiler
} // namespace internal
} // namespace v8