Generate specialized constructor code for constructing simple objects

src/objects.h

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3090 matching lines @@
   // drive optimization.
   inline int compiler_hints();
   inline void set_compiler_hints(int value);
 
   // Add information on assignments of the form this.x = ...;
   void SetThisPropertyAssignmentsInfo(
       bool has_only_this_property_assignments,
       bool has_only_simple_this_property_assignments,
       FixedArray* this_property_assignments);
 
+  // Clear information on assignments of the form this.x = ...;
+  void ClearThisPropertyAssignmentsInfo();
+
   // Indicate that this function only consists of assignments of the form
   // this.x = ...;.
   inline bool has_only_this_property_assignments();
 
   // Indicate that this function only consists of assignments of the form
   // this.x = y; where y is either a constant or refers to an argument.
   inline bool has_only_simple_this_property_assignments();
 
   // For functions which only contains this property assignments this provides
   // access to the names for the properties assigned.
   DECL_ACCESSORS(this_property_assignments, Object)
   inline int this_property_assignments_count();
   inline void set_this_property_assignments_count(int value);
   String* GetThisPropertyAssignmentName(int index);
+  bool IsThisPropertyAssignmentArgument(int index);
+  int GetThisPropertyAssignmentArgument(int index);
+  Object* GetThisPropertyAssignmentConstant(int index);
 
   // [source code]: Source code for the function.
   bool HasSourceCode();
   Object* GetSourceCode();
 
   // Calculate the instance size.
   int CalculateInstanceSize();
 
   // Calculate the number of in-object properties.
   int CalculateInObjectProperties();
@@ skipping 1702 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_