AllocationSites for all literals

src/objects.h

 // Copyright 2012 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 2014 matching lines @@
                                     LookupResult* result,
                                     Handle<Name> key,
                                     Handle<Object> value,
                                     PropertyAttributes attributes,
                                     StrictModeFlag strict_mode,
                                     StoreFromKeyed store_from_keyed);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSReceiver);
 };
 
+class AllocationSiteContext;
+
 // The JSObject describes real heap allocated JavaScript objects with
 // properties.
 // Note that the map of JSObject changes during execution to enable inline
 // caching.
 class JSObject: public JSReceiver {
  public:
   // [properties]: Backing storage for properties.
   // properties is a FixedArray in the fast case and a Dictionary in the
   // slow case.
   DECL_ACCESSORS(properties, FixedArray)  // Get and set fast properties.
@@ skipping 489 matching lines @@
   // Disalow further properties to be added to the object.
   static Handle<Object> PreventExtensions(Handle<JSObject> object);
 
   // ES5 Object.freeze
   static Handle<Object> Freeze(Handle<JSObject> object);
 
   // Called the first time an object is observed with ES7 Object.observe.
   MUST_USE_RESULT MaybeObject* SetObserved(Isolate* isolate);
 
   // Copy object.
+  static Handle<JSObject> Copy(Handle<JSObject> object,
+                               AllocationSiteContext* site_context);
   static Handle<JSObject> Copy(Handle<JSObject> object);
-  static Handle<JSObject> DeepCopy(Handle<JSObject> object);
+  static Handle<JSObject> DeepCopy(Handle<JSObject> object,
+                                   AllocationSiteContext* site_context);
+  static Handle<JSObject> DeepWalk(Handle<JSObject> object,
+                                   AllocationSiteContext* site_context);
 
   // Casting.
   static inline JSObject* cast(Object* obj);
 
   // Dispatched behavior.
   void JSObjectShortPrint(StringStream* accumulator);
   DECLARE_PRINTER(JSObject)
   DECLARE_VERIFIER(JSObject)
 #ifdef OBJECT_PRINT
   void PrintProperties(FILE* out = stdout);
@@ skipping 5345 matching lines @@
   DECL_ACCESSORS(transition_info, Object)
   // nested_site threads a list of sites that represent nested literals
   // walked in a particular order. So [[1, 2], 1, 2] will have one
   // nested_site, but [[1, 2], 3, [4]] will have a list of two.
   DECL_ACCESSORS(nested_site, Object)
   DECL_ACCESSORS(dependent_code, DependentCode)
   DECL_ACCESSORS(weak_next, Object)
 
   inline void Initialize();
 
+  bool HasNestedSites() {
+    return nested_site()->IsAllocationSite();
+  }
+
+  // This method is expensive, it should only be called for reporting.
+  bool IsNestedSite();
+
   ElementsKind GetElementsKind() {
     ASSERT(!IsLiteralSite());
     return static_cast<ElementsKind>(Smi::cast(transition_info())->value());
   }
 
   void SetElementsKind(ElementsKind kind) {
     set_transition_info(Smi::FromInt(static_cast<int>(kind)));
   }
 
   bool IsLiteralSite() {
     // If transition_info is a smi, then it represents an ElementsKind
     // for a constructed array. Otherwise, it must be a boilerplate
     // for an array literal
-    return transition_info()->IsJSArray();
+    return transition_info()->IsJSArray() || transition_info()->IsJSObject();
   }
 
   DECLARE_PRINTER(AllocationSite)
   DECLARE_VERIFIER(AllocationSite)
 
   static inline AllocationSite* cast(Object* obj);
   static inline AllocationSiteMode GetMode(
       ElementsKind boilerplate_elements_kind);
   static inline AllocationSiteMode GetMode(ElementsKind from, ElementsKind to);
   static inline bool CanTrack(InstanceType type);
@@ skipping 2375 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_