Merge arguments branch to bleeding edge (second try).

src/ast.h

 // Copyright 2011 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 1014 matching lines @@
 };
 
 
 class VariableProxy: public Expression {
  public:
   explicit VariableProxy(Variable* var);
 
   DECLARE_NODE_TYPE(VariableProxy)
 
   // Type testing & conversion
-  virtual Property* AsProperty() {
-    return var_ == NULL ? NULL : var_->AsProperty();
-  }
-
-  Variable* AsVariable() {
-    if (this == NULL || var_ == NULL) return NULL;
-    Expression* rewrite = var_->rewrite();
-    if (rewrite == NULL || rewrite->AsSlot() != NULL) return var_;
-    return NULL;
-  }
+  Variable* AsVariable() { return (this == NULL) ? NULL : var_; }
 
   virtual bool IsValidLeftHandSide() {
     return var_ == NULL ? true : var_->IsValidLeftHandSide();
   }
 
   virtual bool IsTrivial() {
     // Reading from a mutable variable is a side effect, but the
     // variable for 'this' is immutable.
     return is_this_ || is_trivial_;
   }
@@ skipping 108 matching lines @@
   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) { }
+        is_function_prototype_(false) { }
 
   DECLARE_NODE_TYPE(Property)
 
   virtual bool IsValidLeftHandSide() { return true; }
   virtual bool IsInlineable() const;
 
   Expression* obj() const { return obj_; }
   Expression* key() const { return key_; }
   virtual 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_; }
-
   // Type feedback information.
   void RecordTypeFeedback(TypeFeedbackOracle* oracle);
   virtual bool IsMonomorphic() { return is_monomorphic_; }
   virtual ZoneMapList* GetReceiverTypes() { return receiver_types_; }
   virtual bool IsArrayLength() { return is_array_length_; }
   virtual Handle<Map> GetMonomorphicReceiverType() {
     return monomorphic_receiver_type_;
   }
 
  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_;
 };
 
 
 class Call: public Expression {
  public:
   Call(Expression* expression, ZoneList<Expression*>* arguments, int pos)
       : expression_(expression),
         arguments_(arguments),
         pos_(pos),
@@ skipping 412 matching lines @@
   FunctionLiteral(Handle<String> name,
                   Scope* scope,
                   ZoneList<Statement*>* body,
                   int materialized_literal_count,
                   int expected_property_count,
                   bool has_only_simple_this_property_assignments,
                   Handle<FixedArray> this_property_assignments,
                   int num_parameters,
                   int start_position,
                   int end_position,
-                  bool is_expression)
+                  bool is_expression,
+                  bool has_duplicate_parameters)
       : name_(name),
         scope_(scope),
         body_(body),
         materialized_literal_count_(materialized_literal_count),
         expected_property_count_(expected_property_count),
         has_only_simple_this_property_assignments_(
             has_only_simple_this_property_assignments),
         this_property_assignments_(this_property_assignments),
         num_parameters_(num_parameters),
         start_position_(start_position),
         end_position_(end_position),
-        is_expression_(is_expression),
         function_token_position_(RelocInfo::kNoPosition),
         inferred_name_(HEAP->empty_string()),
-        pretenure_(false) { }
+        is_expression_(is_expression),
+        pretenure_(false),
+        has_duplicate_parameters_(has_duplicate_parameters) {
+  }
 
   DECLARE_NODE_TYPE(FunctionLiteral)
 
   Handle<String> name() const { return name_; }
   Scope* scope() const { return scope_; }
   ZoneList<Statement*>* body() const { return body_; }
   void set_function_token_position(int pos) { function_token_position_ = pos; }
   int function_token_position() const { return function_token_position_; }
   int start_position() const { return start_position_; }
   int end_position() const { return end_position_; }
@@ skipping 19 matching lines @@
 
   Handle<String> inferred_name() const { return inferred_name_; }
   void set_inferred_name(Handle<String> inferred_name) {
     inferred_name_ = inferred_name;
   }
 
   bool pretenure() { return pretenure_; }
   void set_pretenure(bool value) { pretenure_ = value; }
   virtual bool IsInlineable() const;
 
+  bool has_duplicate_parameters() { return has_duplicate_parameters_; }
+
  private:
   Handle<String> name_;
   Scope* scope_;
   ZoneList<Statement*>* body_;
   int materialized_literal_count_;
   int expected_property_count_;
   bool has_only_simple_this_property_assignments_;
   Handle<FixedArray> this_property_assignments_;
   int num_parameters_;
   int start_position_;
   int end_position_;
-  bool is_expression_;
   int function_token_position_;
   Handle<String> inferred_name_;
+  bool is_expression_;
   bool pretenure_;
+  bool has_duplicate_parameters_;
 };
 
 
 class SharedFunctionInfoLiteral: public Expression {
  public:
   explicit SharedFunctionInfoLiteral(
       Handle<SharedFunctionInfo> shared_function_info)
       : shared_function_info_(shared_function_info) { }
 
   DECLARE_NODE_TYPE(SharedFunctionInfoLiteral)
@@ skipping 436 matching lines @@
 
  private:
   Isolate* isolate_;
   bool stack_overflow_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_