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// 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_
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