Implement simple fast-path code for functions containing this property stores and global variables.

src/full-codegen.h

 // Copyright 2009 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 45 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(FullCodeGenSyntaxChecker);
 };
 
 
 // -----------------------------------------------------------------------------
 // Full code generator.
 
 class FullCodeGenerator: public AstVisitor {
  public:
+  enum Mode {
+    PRIMARY,
+    SECONDARY
+  };
+
   FullCodeGenerator(MacroAssembler* masm, Handle<Script> script, bool is_eval)
       : masm_(masm),
-        function_(NULL),
         script_(script),
         is_eval_(is_eval),
+        function_(NULL),
         nesting_stack_(NULL),
         loop_depth_(0),
         location_(kStack),
         true_label_(NULL),
         false_label_(NULL) {
   }
 
   static Handle<Code> MakeCode(FunctionLiteral* fun,
                                Handle<Script> script,
                                bool is_eval);
 
-  void Generate(FunctionLiteral* fun);
+  void Generate(FunctionLiteral* fun, Mode mode);
 
  private:
   class Breakable;
   class Iteration;
   class TryCatch;
   class TryFinally;
   class Finally;
   class ForIn;
 
   class NestedStatement BASE_EMBEDDED {
@@ skipping 322 matching lines @@
   void LoadContextField(Register dst, int context_index);
 
   // AST node visit functions.
 #define DECLARE_VISIT(type) virtual void Visit##type(type* node);
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
   // Handles the shortcutted logical binary operations in VisitBinaryOperation.
   void EmitLogicalOperation(BinaryOperation* expr);
 
   MacroAssembler* masm_;
-  FunctionLiteral* function_;
   Handle<Script> script_;
   bool is_eval_;
+
+  FunctionLiteral* function_;
+
   Label return_label_;
   NestedStatement* nesting_stack_;
   int loop_depth_;
 
   Expression::Context context_;
   Location location_;
   Label* true_label_;
   Label* false_label_;
 
   friend class NestedStatement;
 
   DISALLOW_COPY_AND_ASSIGN(FullCodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FULL_CODEGEN_H_