Merge up to bleeding_edge r7201 to isolates branch.

src/ast.h

 // Copyright 2010 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 1202 matching lines @@
   enum Type { NORMAL, SYNTHETIC };
   Property(Expression* obj, Expression* key, int pos, Type type = NORMAL)
       : obj_(obj),
         key_(key),
         pos_(pos),
         type_(type),
         receiver_types_(NULL),
         is_monomorphic_(false),
         is_array_length_(false),
         is_string_length_(false),
+        is_string_access_(false),
         is_function_prototype_(false),
         is_arguments_access_(false) { }
 
   DECLARE_NODE_TYPE(Property)
 
   virtual bool IsValidLeftHandSide() { return true; }
   virtual bool IsInlineable() const;
 
   Expression* obj() const { return obj_; }
   Expression* key() const { return key_; }
   int position() const { return pos_; }
   bool is_synthetic() const { return type_ == SYNTHETIC; }
 
   bool IsStringLength() const { return is_string_length_; }
+  bool IsStringAccess() const { return is_string_access_; }
   bool IsFunctionPrototype() const { return is_function_prototype_; }
 
   // Marks that this is actually an argument rewritten to a keyed property
   // accessing the argument through the arguments shadow object.
   void set_is_arguments_access(bool is_arguments_access) {
     is_arguments_access_ = is_arguments_access;
   }
   bool is_arguments_access() const { return is_arguments_access_; }
 
   ExternalArrayType GetExternalArrayType() const { return array_type_; }
@@ skipping 13 matching lines @@
  private:
   Expression* obj_;
   Expression* key_;
   int pos_;
   Type type_;
 
   ZoneMapList* receiver_types_;
   bool is_monomorphic_ : 1;
   bool is_array_length_ : 1;
   bool is_string_length_ : 1;
+  bool is_string_access_ : 1;
   bool is_function_prototype_ : 1;
   bool is_arguments_access_ : 1;
   Handle<Map> monomorphic_receiver_type_;
   ExternalArrayType array_type_;
 };
 
 
 class Call: public Expression {
  public:
   Call(Expression* expression, ZoneList<Expression*>* arguments, int pos)
@@ skipping 928 matching lines @@
 #undef DEF_VISIT
 
  private:
   bool stack_overflow_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_