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 847 matching lines @@
 #define DECL_BOOLEAN_ACCESSORS(name)   \
   inline bool name();                  \
   inline void set_##name(bool value);  \
 
 
 #define DECL_ACCESSORS(name, type)                                      \
   inline type* name();                                                  \
   inline void set_##name(type* value,                                   \
                          WriteBarrierMode mode = UPDATE_WRITE_BARRIER); \
 
-
 class AccessorPair;
+class AllocationSite;
+class AllocationSiteContext;
 class DictionaryElementsAccessor;
 class ElementsAccessor;
 class Failure;
 class FixedArrayBase;
 class ObjectVisitor;
 class StringStream;
 class Type;
 
 struct ValueInfo : public Malloced {
   ValueInfo() : type(FIRST_TYPE), ptr(NULL), str(NULL), number(0) { }
@@ skipping 1657 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,
+                               Handle<AllocationSite> site);
   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 5439 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());
+    ASSERT(!SitePointsToLiteral());
     return static_cast<ElementsKind>(Smi::cast(transition_info())->value());
   }
 
   void SetElementsKind(ElementsKind kind) {
     set_transition_info(Smi::FromInt(static_cast<int>(kind)));
   }
 
-  bool IsLiteralSite() {
+  bool SitePointsToLiteral() {
     // 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();
+    // for an object or array literal.
+    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_