Rollback to Version 3.28.4 (based on bleeding_edge revision r22031)

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index 1396bf4aaabfa28dec0d90bacbcdd7b533e2147f..23f9eef477a9a318769ad67256b650e23ca11372 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -1628,14 +1628,17 @@ class VariableProxy V8_FINAL : public Expression {
 
   bool IsArguments() const { return var_ != NULL && var_->is_arguments(); }
 
+  bool IsLValue() const { return is_lvalue_; }
+
   Handle<String> name() const { return name_->string(); }
   const AstRawString* raw_name() const { return name_; }
   Variable* var() const { return var_; }
   bool is_this() const { return is_this_; }
   Interface* interface() const { return interface_; }
 
-  bool is_assigned() const { return is_assigned_; }
-  void set_is_assigned() { is_assigned_ = true; }
+
+  void MarkAsTrivial() { is_trivial_ = true; }
+  void MarkAsLValue() { is_lvalue_ = true; }
 
   // Bind this proxy to the variable var. Interfaces must match.
   void BindTo(Variable* var);
@@ -1652,7 +1655,10 @@ class VariableProxy V8_FINAL : public Expression {
   const AstRawString* name_;
   Variable* var_;  // resolved variable, or NULL
   bool is_this_;
-  bool is_assigned_;
+  bool is_trivial_;
+  // True if this variable proxy is being used in an assignment
+  // or with a increment/decrement operator.
+  bool is_lvalue_;
   Interface* interface_;
 };