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Issue 218753005: Replace set_map_and_elements by MigrateToMap-based SetMapAndElements (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Addressed comment Created 6 years, 8 months ago
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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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2182 // the elements array may be shared by a few objects and so before 2182 // the elements array may be shared by a few objects and so before
2183 // writing to any element the array must be copied. Use 2183 // writing to any element the array must be copied. Use
2184 // EnsureWritableFastElements in this case. 2184 // EnsureWritableFastElements in this case.
2185 // 2185 //
2186 // In the slow mode the elements is either a NumberDictionary, an 2186 // In the slow mode the elements is either a NumberDictionary, an
2187 // ExternalArray, or a FixedArray parameter map for a (sloppy) 2187 // ExternalArray, or a FixedArray parameter map for a (sloppy)
2188 // arguments object. 2188 // arguments object.
2189 DECL_ACCESSORS(elements, FixedArrayBase) 2189 DECL_ACCESSORS(elements, FixedArrayBase)
2190 inline void initialize_elements(); 2190 inline void initialize_elements();
2191 MUST_USE_RESULT inline MaybeObject* ResetElements(); 2191 MUST_USE_RESULT inline MaybeObject* ResetElements();
2192 static void ResetElements(Handle<JSObject> object);
2193 static inline void SetMapAndElements(Handle<JSObject> object,
2194 Handle<Map> map,
2195 Handle<FixedArrayBase> elements);
2192 inline ElementsKind GetElementsKind(); 2196 inline ElementsKind GetElementsKind();
2193 inline ElementsAccessor* GetElementsAccessor(); 2197 inline ElementsAccessor* GetElementsAccessor();
2194 // Returns true if an object has elements of FAST_SMI_ELEMENTS ElementsKind. 2198 // Returns true if an object has elements of FAST_SMI_ELEMENTS ElementsKind.
2195 inline bool HasFastSmiElements(); 2199 inline bool HasFastSmiElements();
2196 // Returns true if an object has elements of FAST_ELEMENTS ElementsKind. 2200 // Returns true if an object has elements of FAST_ELEMENTS ElementsKind.
2197 inline bool HasFastObjectElements(); 2201 inline bool HasFastObjectElements();
2198 // Returns true if an object has elements of FAST_ELEMENTS or 2202 // Returns true if an object has elements of FAST_ELEMENTS or
2199 // FAST_SMI_ONLY_ELEMENTS. 2203 // FAST_SMI_ONLY_ELEMENTS.
2200 inline bool HasFastSmiOrObjectElements(); 2204 inline bool HasFastSmiOrObjectElements();
2201 // Returns true if an object has any of the fast elements kinds. 2205 // Returns true if an object has any of the fast elements kinds.
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2230 inline bool HasFixedUint16Elements(); 2234 inline bool HasFixedUint16Elements();
2231 inline bool HasFixedInt32Elements(); 2235 inline bool HasFixedInt32Elements();
2232 inline bool HasFixedUint32Elements(); 2236 inline bool HasFixedUint32Elements();
2233 inline bool HasFixedFloat32Elements(); 2237 inline bool HasFixedFloat32Elements();
2234 inline bool HasFixedFloat64Elements(); 2238 inline bool HasFixedFloat64Elements();
2235 2239
2236 bool HasFastArgumentsElements(); 2240 bool HasFastArgumentsElements();
2237 bool HasDictionaryArgumentsElements(); 2241 bool HasDictionaryArgumentsElements();
2238 inline SeededNumberDictionary* element_dictionary(); // Gets slow elements. 2242 inline SeededNumberDictionary* element_dictionary(); // Gets slow elements.
2239 2243
2240 inline void set_map_and_elements(
2241 Map* map,
2242 FixedArrayBase* value,
2243 WriteBarrierMode mode = UPDATE_WRITE_BARRIER);
2244
2245 // Requires: HasFastElements(). 2244 // Requires: HasFastElements().
2246 static Handle<FixedArray> EnsureWritableFastElements( 2245 static Handle<FixedArray> EnsureWritableFastElements(
2247 Handle<JSObject> object); 2246 Handle<JSObject> object);
2248 MUST_USE_RESULT inline MaybeObject* EnsureWritableFastElements(); 2247 MUST_USE_RESULT inline MaybeObject* EnsureWritableFastElements();
2249 2248
2250 // Collects elements starting at index 0. 2249 // Collects elements starting at index 0.
2251 // Undefined values are placed after non-undefined values. 2250 // Undefined values are placed after non-undefined values.
2252 // Returns the number of non-undefined values. 2251 // Returns the number of non-undefined values.
2253 static Handle<Object> PrepareElementsForSort(Handle<JSObject> object, 2252 static Handle<Object> PrepareElementsForSort(Handle<JSObject> object,
2254 uint32_t limit); 2253 uint32_t limit);
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10823 } else { 10822 } else {
10824 value &= ~(1 << bit_position); 10823 value &= ~(1 << bit_position);
10825 } 10824 }
10826 return value; 10825 return value;
10827 } 10826 }
10828 }; 10827 };
10829 10828
10830 } } // namespace v8::internal 10829 } } // namespace v8::internal
10831 10830
10832 #endif // V8_OBJECTS_H_ 10831 #endif // V8_OBJECTS_H_
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