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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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75 TRANSITION = 6, | 75 TRANSITION = 6, |
76 // Only used as a marker in LookupResult. | 76 // Only used as a marker in LookupResult. |
77 NONEXISTENT = 7 | 77 NONEXISTENT = 7 |
78 }; | 78 }; |
79 | 79 |
80 | 80 |
81 class Representation { | 81 class Representation { |
82 public: | 82 public: |
83 enum Kind { | 83 enum Kind { |
84 kNone, | 84 kNone, |
| 85 kByte, |
85 kSmi, | 86 kSmi, |
86 kInteger32, | 87 kInteger32, |
87 kDouble, | 88 kDouble, |
88 kHeapObject, | 89 kHeapObject, |
89 kTagged, | 90 kTagged, |
90 kExternal, | 91 kExternal, |
91 kNumRepresentations | 92 kNumRepresentations |
92 }; | 93 }; |
93 | 94 |
94 Representation() : kind_(kNone) { } | 95 Representation() : kind_(kNone) { } |
95 | 96 |
96 static Representation None() { return Representation(kNone); } | 97 static Representation None() { return Representation(kNone); } |
97 static Representation Tagged() { return Representation(kTagged); } | 98 static Representation Tagged() { return Representation(kTagged); } |
| 99 static Representation Byte() { return Representation(kByte); } |
98 static Representation Smi() { return Representation(kSmi); } | 100 static Representation Smi() { return Representation(kSmi); } |
99 static Representation Integer32() { return Representation(kInteger32); } | 101 static Representation Integer32() { return Representation(kInteger32); } |
100 static Representation Double() { return Representation(kDouble); } | 102 static Representation Double() { return Representation(kDouble); } |
101 static Representation HeapObject() { return Representation(kHeapObject); } | 103 static Representation HeapObject() { return Representation(kHeapObject); } |
102 static Representation External() { return Representation(kExternal); } | 104 static Representation External() { return Representation(kExternal); } |
103 | 105 |
104 static Representation FromKind(Kind kind) { return Representation(kind); } | 106 static Representation FromKind(Kind kind) { return Representation(kind); } |
105 | 107 |
106 // TODO(rossberg): this should die eventually. | 108 // TODO(rossberg): this should die eventually. |
107 static Representation FromType(TypeInfo info); | 109 static Representation FromType(TypeInfo info); |
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132 } | 134 } |
133 | 135 |
134 Representation generalize(Representation other) { | 136 Representation generalize(Representation other) { |
135 if (other.fits_into(*this)) return *this; | 137 if (other.fits_into(*this)) return *this; |
136 if (other.is_more_general_than(*this)) return other; | 138 if (other.is_more_general_than(*this)) return other; |
137 return Representation::Tagged(); | 139 return Representation::Tagged(); |
138 } | 140 } |
139 | 141 |
140 Kind kind() const { return static_cast<Kind>(kind_); } | 142 Kind kind() const { return static_cast<Kind>(kind_); } |
141 bool IsNone() const { return kind_ == kNone; } | 143 bool IsNone() const { return kind_ == kNone; } |
| 144 bool IsByte() const { return kind_ == kByte; } |
142 bool IsTagged() const { return kind_ == kTagged; } | 145 bool IsTagged() const { return kind_ == kTagged; } |
143 bool IsSmi() const { return kind_ == kSmi; } | 146 bool IsSmi() const { return kind_ == kSmi; } |
144 bool IsSmiOrTagged() const { return IsSmi() || IsTagged(); } | 147 bool IsSmiOrTagged() const { return IsSmi() || IsTagged(); } |
145 bool IsInteger32() const { return kind_ == kInteger32; } | 148 bool IsInteger32() const { return kind_ == kInteger32; } |
146 bool IsSmiOrInteger32() const { return IsSmi() || IsInteger32(); } | 149 bool IsSmiOrInteger32() const { return IsSmi() || IsInteger32(); } |
147 bool IsDouble() const { return kind_ == kDouble; } | 150 bool IsDouble() const { return kind_ == kDouble; } |
148 bool IsHeapObject() const { return kind_ == kHeapObject; } | 151 bool IsHeapObject() const { return kind_ == kHeapObject; } |
149 bool IsExternal() const { return kind_ == kExternal; } | 152 bool IsExternal() const { return kind_ == kExternal; } |
150 bool IsSpecialization() const { | 153 bool IsSpecialization() const { |
151 return kind_ == kInteger32 || kind_ == kDouble || kind_ == kSmi; | 154 return IsByte() || IsSmi() || IsInteger32() || IsDouble(); |
152 } | 155 } |
153 const char* Mnemonic() const; | 156 const char* Mnemonic() const; |
154 | 157 |
155 private: | 158 private: |
156 explicit Representation(Kind k) : kind_(k) { } | 159 explicit Representation(Kind k) : kind_(k) { } |
157 | 160 |
158 // Make sure kind fits in int8. | 161 // Make sure kind fits in int8. |
159 STATIC_ASSERT(kNumRepresentations <= (1 << kBitsPerByte)); | 162 STATIC_ASSERT(kNumRepresentations <= (1 << kBitsPerByte)); |
160 | 163 |
161 int8_t kind_; | 164 int8_t kind_; |
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269 PropertyDetails(int value, PropertyAttributes attributes) { | 272 PropertyDetails(int value, PropertyAttributes attributes) { |
270 value_ = AttributesField::update(value, attributes); | 273 value_ = AttributesField::update(value, attributes); |
271 } | 274 } |
272 | 275 |
273 uint32_t value_; | 276 uint32_t value_; |
274 }; | 277 }; |
275 | 278 |
276 } } // namespace v8::internal | 279 } } // namespace v8::internal |
277 | 280 |
278 #endif // V8_PROPERTY_DETAILS_H_ | 281 #endif // V8_PROPERTY_DETAILS_H_ |
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