Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_COMPILER_TYPE_HINTS_H_ |
| 6 | #define V8_COMPILER_TYPE_HINTS_H_ |
| 7 | |
| 8 | #include "src/base/flags.h" |
| 9 | #include "src/utils.h" |
| 10 | |
| 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | namespace compiler { |
| 14 | |
| 15 | // Type hints for an binary operation. |
| 16 | class BinaryOperationHints final { |
| 17 | public: |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 18 | enum Hint { |
| 19 | kNone, |
| 20 | kSignedSmall, |
| 21 | kSigned32, |
| 22 | kNumberOrUndefined, |
| 23 | kString, |
| 24 | kAny |
| 25 | }; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 26 | |
| 27 | BinaryOperationHints() : BinaryOperationHints(kNone, kNone, kNone) {} |
| 28 | BinaryOperationHints(Hint left, Hint right, Hint result) |
| 29 | : bit_field_(LeftField::encode(left) | RightField::encode(right) | |
| 30 | ResultField::encode(result)) {} |
| 31 | |
| 32 | static BinaryOperationHints Any() { |
| 33 | return BinaryOperationHints(kAny, kAny, kAny); |
| 34 | } |
| 35 | |
| 36 | Hint left() const { return LeftField::decode(bit_field_); } |
| 37 | Hint right() const { return RightField::decode(bit_field_); } |
| 38 | Hint result() const { return ResultField::decode(bit_field_); } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 39 | Hint combined() const { return Combine(Combine(left(), right()), result()); } |
| 40 | |
| 41 | // Hint 'subtyping' and generalization. |
| 42 | static bool Is(Hint h1, Hint h2); |
| 43 | static Hint Combine(Hint h1, Hint h2); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 44 | |
| 45 | bool operator==(BinaryOperationHints const& that) const { |
| 46 | return this->bit_field_ == that.bit_field_; |
| 47 | } |
| 48 | bool operator!=(BinaryOperationHints const& that) const { |
| 49 | return !(*this == that); |
| 50 | } |
| 51 | |
| 52 | friend size_t hash_value(BinaryOperationHints const& hints) { |
| 53 | return hints.bit_field_; |
| 54 | } |
| 55 | |
| 56 | private: |
| 57 | typedef BitField<Hint, 0, 3> LeftField; |
| 58 | typedef BitField<Hint, 3, 3> RightField; |
| 59 | typedef BitField<Hint, 6, 3> ResultField; |
| 60 | |
| 61 | uint32_t bit_field_; |
| 62 | }; |
| 63 | |
| 64 | std::ostream& operator<<(std::ostream&, BinaryOperationHints::Hint); |
| 65 | std::ostream& operator<<(std::ostream&, BinaryOperationHints); |
| 66 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 67 | // Type hints for an binary operation. |
| 68 | class CompareOperationHints final { |
| 69 | public: |
| 70 | enum Hint { |
| 71 | kNone, |
| 72 | kBoolean, |
| 73 | kSignedSmall, |
| 74 | kNumber, |
| 75 | kString, |
| 76 | kInternalizedString, |
| 77 | kUniqueName, |
| 78 | kReceiver, |
| 79 | kAny |
| 80 | }; |
| 81 | |
| 82 | CompareOperationHints() : CompareOperationHints(kNone, kNone, kNone) {} |
| 83 | CompareOperationHints(Hint left, Hint right, Hint combined) |
| 84 | : bit_field_(LeftField::encode(left) | RightField::encode(right) | |
| 85 | CombinedField::encode(combined)) {} |
| 86 | |
| 87 | static CompareOperationHints Any() { |
| 88 | return CompareOperationHints(kAny, kAny, kAny); |
| 89 | } |
| 90 | |
| 91 | Hint left() const { return LeftField::decode(bit_field_); } |
| 92 | Hint right() const { return RightField::decode(bit_field_); } |
| 93 | Hint combined() const { return CombinedField::decode(bit_field_); } |
| 94 | |
| 95 | bool operator==(CompareOperationHints const& that) const { |
| 96 | return this->bit_field_ == that.bit_field_; |
| 97 | } |
| 98 | bool operator!=(CompareOperationHints const& that) const { |
| 99 | return !(*this == that); |
| 100 | } |
| 101 | |
| 102 | friend size_t hash_value(CompareOperationHints const& hints) { |
| 103 | return hints.bit_field_; |
| 104 | } |
| 105 | |
| 106 | private: |
| 107 | typedef BitField<Hint, 0, 4> LeftField; |
| 108 | typedef BitField<Hint, 4, 4> RightField; |
| 109 | typedef BitField<Hint, 8, 4> CombinedField; |
| 110 | |
| 111 | uint32_t bit_field_; |
| 112 | }; |
| 113 | |
| 114 | std::ostream& operator<<(std::ostream&, CompareOperationHints::Hint); |
| 115 | std::ostream& operator<<(std::ostream&, CompareOperationHints); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 116 | |
| 117 | // Type hints for the ToBoolean type conversion. |
| 118 | enum class ToBooleanHint : uint16_t { |
| 119 | kNone = 0u, |
| 120 | kUndefined = 1u << 0, |
| 121 | kBoolean = 1u << 1, |
| 122 | kNull = 1u << 2, |
| 123 | kSmallInteger = 1u << 3, |
| 124 | kReceiver = 1u << 4, |
| 125 | kString = 1u << 5, |
| 126 | kSymbol = 1u << 6, |
| 127 | kHeapNumber = 1u << 7, |
| 128 | kSimdValue = 1u << 8, |
| 129 | kAny = kUndefined | kBoolean | kNull | kSmallInteger | kReceiver | kString | |
| 130 | kSymbol | kHeapNumber | kSimdValue |
| 131 | }; |
| 132 | |
| 133 | std::ostream& operator<<(std::ostream&, ToBooleanHint); |
| 134 | |
| 135 | typedef base::Flags<ToBooleanHint, uint16_t> ToBooleanHints; |
| 136 | |
| 137 | std::ostream& operator<<(std::ostream&, ToBooleanHints); |
| 138 | |
| 139 | DEFINE_OPERATORS_FOR_FLAGS(ToBooleanHints) |
| 140 | |
| 141 | } // namespace compiler |
| 142 | } // namespace internal |
| 143 | } // namespace v8 |
| 144 | |
| 145 | #endif // V8_COMPILER_TYPE_HINTS_H_ |