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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, | |
86 kSmi, | 85 kSmi, |
87 kInteger32, | 86 kInteger32, |
88 kDouble, | 87 kDouble, |
89 kHeapObject, | 88 kHeapObject, |
90 kTagged, | 89 kTagged, |
91 kExternal, | 90 kExternal, |
92 kNumRepresentations | 91 kNumRepresentations |
93 }; | 92 }; |
94 | 93 |
95 Representation() : kind_(kNone) { } | 94 Representation() : kind_(kNone) { } |
96 | 95 |
97 static Representation None() { return Representation(kNone); } | 96 static Representation None() { return Representation(kNone); } |
98 static Representation Tagged() { return Representation(kTagged); } | 97 static Representation Tagged() { return Representation(kTagged); } |
99 static Representation Byte() { return Representation(kByte); } | |
100 static Representation Smi() { return Representation(kSmi); } | 98 static Representation Smi() { return Representation(kSmi); } |
101 static Representation Integer32() { return Representation(kInteger32); } | 99 static Representation Integer32() { return Representation(kInteger32); } |
102 static Representation Double() { return Representation(kDouble); } | 100 static Representation Double() { return Representation(kDouble); } |
103 static Representation HeapObject() { return Representation(kHeapObject); } | 101 static Representation HeapObject() { return Representation(kHeapObject); } |
104 static Representation External() { return Representation(kExternal); } | 102 static Representation External() { return Representation(kExternal); } |
105 | 103 |
106 static Representation FromKind(Kind kind) { return Representation(kind); } | 104 static Representation FromKind(Kind kind) { return Representation(kind); } |
107 | 105 |
108 // TODO(rossberg): this should die eventually. | 106 // TODO(rossberg): this should die eventually. |
109 static Representation FromType(TypeInfo info); | 107 static Representation FromType(TypeInfo info); |
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134 } | 132 } |
135 | 133 |
136 Representation generalize(Representation other) { | 134 Representation generalize(Representation other) { |
137 if (other.fits_into(*this)) return *this; | 135 if (other.fits_into(*this)) return *this; |
138 if (other.is_more_general_than(*this)) return other; | 136 if (other.is_more_general_than(*this)) return other; |
139 return Representation::Tagged(); | 137 return Representation::Tagged(); |
140 } | 138 } |
141 | 139 |
142 Kind kind() const { return static_cast<Kind>(kind_); } | 140 Kind kind() const { return static_cast<Kind>(kind_); } |
143 bool IsNone() const { return kind_ == kNone; } | 141 bool IsNone() const { return kind_ == kNone; } |
144 bool IsByte() const { return kind_ == kByte; } | |
145 bool IsTagged() const { return kind_ == kTagged; } | 142 bool IsTagged() const { return kind_ == kTagged; } |
146 bool IsSmi() const { return kind_ == kSmi; } | 143 bool IsSmi() const { return kind_ == kSmi; } |
147 bool IsSmiOrTagged() const { return IsSmi() || IsTagged(); } | 144 bool IsSmiOrTagged() const { return IsSmi() || IsTagged(); } |
148 bool IsInteger32() const { return kind_ == kInteger32; } | 145 bool IsInteger32() const { return kind_ == kInteger32; } |
149 bool IsSmiOrInteger32() const { return IsSmi() || IsInteger32(); } | 146 bool IsSmiOrInteger32() const { return IsSmi() || IsInteger32(); } |
150 bool IsDouble() const { return kind_ == kDouble; } | 147 bool IsDouble() const { return kind_ == kDouble; } |
151 bool IsHeapObject() const { return kind_ == kHeapObject; } | 148 bool IsHeapObject() const { return kind_ == kHeapObject; } |
152 bool IsExternal() const { return kind_ == kExternal; } | 149 bool IsExternal() const { return kind_ == kExternal; } |
153 bool IsSpecialization() const { | 150 bool IsSpecialization() const { |
154 return IsByte() || IsSmi() || IsInteger32() || IsDouble(); | 151 return kind_ == kInteger32 || kind_ == kDouble || kind_ == kSmi; |
155 } | 152 } |
156 const char* Mnemonic() const; | 153 const char* Mnemonic() const; |
157 | 154 |
158 private: | 155 private: |
159 explicit Representation(Kind k) : kind_(k) { } | 156 explicit Representation(Kind k) : kind_(k) { } |
160 | 157 |
161 // Make sure kind fits in int8. | 158 // Make sure kind fits in int8. |
162 STATIC_ASSERT(kNumRepresentations <= (1 << kBitsPerByte)); | 159 STATIC_ASSERT(kNumRepresentations <= (1 << kBitsPerByte)); |
163 | 160 |
164 int8_t kind_; | 161 int8_t kind_; |
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272 PropertyDetails(int value, PropertyAttributes attributes) { | 269 PropertyDetails(int value, PropertyAttributes attributes) { |
273 value_ = AttributesField::update(value, attributes); | 270 value_ = AttributesField::update(value, attributes); |
274 } | 271 } |
275 | 272 |
276 uint32_t value_; | 273 uint32_t value_; |
277 }; | 274 }; |
278 | 275 |
279 } } // namespace v8::internal | 276 } } // namespace v8::internal |
280 | 277 |
281 #endif // V8_PROPERTY_DETAILS_H_ | 278 #endif // V8_PROPERTY_DETAILS_H_ |
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