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1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 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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951 | 951 |
952 | 952 |
953 bool CompileOptimized(Handle<JSFunction> function, | 953 bool CompileOptimized(Handle<JSFunction> function, |
954 int osr_ast_id, | 954 int osr_ast_id, |
955 ClearExceptionFlag flag) { | 955 ClearExceptionFlag flag) { |
956 CompilationInfo info(function); | 956 CompilationInfo info(function); |
957 info.SetOptimizing(osr_ast_id); | 957 info.SetOptimizing(osr_ast_id); |
958 return CompileLazyHelper(&info, flag); | 958 return CompileLazyHelper(&info, flag); |
959 } | 959 } |
960 | 960 |
961 | |
962 OptimizedObjectForAddingMultipleProperties:: | |
963 OptimizedObjectForAddingMultipleProperties(Handle<JSObject> object, | |
964 int expected_additional_properties, | |
965 bool condition) { | |
966 object_ = object; | |
967 if (condition && object_->HasFastProperties() && !object->IsJSGlobalProxy()) { | |
968 // Normalize the properties of object to avoid n^2 behavior | |
969 // when extending the object multiple properties. Indicate the number of | |
970 // properties to be added. | |
971 unused_property_fields_ = object->map()->unused_property_fields(); | |
972 NormalizeProperties(object_, | |
973 KEEP_INOBJECT_PROPERTIES, | |
974 expected_additional_properties); | |
975 has_been_transformed_ = true; | |
976 | |
977 } else { | |
978 has_been_transformed_ = false; | |
979 } | |
980 } | |
981 | |
982 | |
983 OptimizedObjectForAddingMultipleProperties:: | |
984 ~OptimizedObjectForAddingMultipleProperties() { | |
985 // Reoptimize the object to allow fast property access. | |
986 if (has_been_transformed_) { | |
987 TransformToFastProperties(object_, unused_property_fields_); | |
988 } | |
989 } | |
990 | |
991 } } // namespace v8::internal | 961 } } // namespace v8::internal |
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