| // Copyright 2015 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_HINTS_H_ |
| #define V8_COMPILER_TYPE_HINTS_H_ |
| |
| #include "src/base/flags.h" |
| #include "src/utils.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace compiler { |
| |
| // Type hints for an binary operation. |
| class BinaryOperationHints final { |
| public: |
| enum Hint { kNone, kSignedSmall, kSigned32, kNumber, kString, kAny }; |
| |
| BinaryOperationHints() : BinaryOperationHints(kNone, kNone, kNone) {} |
| BinaryOperationHints(Hint left, Hint right, Hint result) |
| : bit_field_(LeftField::encode(left) | RightField::encode(right) | |
| ResultField::encode(result)) {} |
| |
| static BinaryOperationHints Any() { |
| return BinaryOperationHints(kAny, kAny, kAny); |
| } |
| |
| Hint left() const { return LeftField::decode(bit_field_); } |
| Hint right() const { return RightField::decode(bit_field_); } |
| Hint result() const { return ResultField::decode(bit_field_); } |
| |
| bool operator==(BinaryOperationHints const& that) const { |
| return this->bit_field_ == that.bit_field_; |
| } |
| bool operator!=(BinaryOperationHints const& that) const { |
| return !(*this == that); |
| } |
| |
| friend size_t hash_value(BinaryOperationHints const& hints) { |
| return hints.bit_field_; |
| } |
| |
| private: |
| typedef BitField<Hint, 0, 3> LeftField; |
| typedef BitField<Hint, 3, 3> RightField; |
| typedef BitField<Hint, 6, 3> ResultField; |
| |
| uint32_t bit_field_; |
| }; |
| |
| std::ostream& operator<<(std::ostream&, BinaryOperationHints::Hint); |
| std::ostream& operator<<(std::ostream&, BinaryOperationHints); |
| |
| |
| // Type hints for the ToBoolean type conversion. |
| enum class ToBooleanHint : uint16_t { |
| kNone = 0u, |
| kUndefined = 1u << 0, |
| kBoolean = 1u << 1, |
| kNull = 1u << 2, |
| kSmallInteger = 1u << 3, |
| kReceiver = 1u << 4, |
| kString = 1u << 5, |
| kSymbol = 1u << 6, |
| kHeapNumber = 1u << 7, |
| kSimdValue = 1u << 8, |
| kAny = kUndefined | kBoolean | kNull | kSmallInteger | kReceiver | kString | |
| kSymbol | kHeapNumber | kSimdValue |
| }; |
| |
| std::ostream& operator<<(std::ostream&, ToBooleanHint); |
| |
| typedef base::Flags<ToBooleanHint, uint16_t> ToBooleanHints; |
| |
| std::ostream& operator<<(std::ostream&, ToBooleanHints); |
| |
| DEFINE_OPERATORS_FOR_FLAGS(ToBooleanHints) |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_COMPILER_TYPE_HINTS_H_ |