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

src/compiler.h

 // Copyright 2006-2008 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 25 matching lines @@
 namespace internal {
 
 // CompilationInfo encapsulates some information known at compile time.
 class CompilationInfo BASE_EMBEDDED {
  public:
   CompilationInfo(Handle<SharedFunctionInfo> shared_info,
                   Handle<Object> receiver,
                   int loop_nesting)
       : shared_info_(shared_info),
         receiver_(receiver),
-        loop_nesting_(loop_nesting) {
+        loop_nesting_(loop_nesting),
+        has_this_properties_(false),
+        has_globals_(false) {
   }
 
   Handle<SharedFunctionInfo> shared_info() { return shared_info_; }
 
   bool has_receiver() { return !receiver_.is_null(); }
   Handle<Object> receiver() { return receiver_; }
 
   int loop_nesting() { return loop_nesting_; }
 
+  bool has_this_properties() { return has_this_properties_; }
+  void set_has_this_properties(bool flag) { has_this_properties_ = flag; }
+
+  bool has_globals() { return has_globals_; }
+  void set_has_globals(bool flag) { has_globals_ = flag; }
+
  private:
   Handle<SharedFunctionInfo> shared_info_;
   Handle<Object> receiver_;
   int loop_nesting_;
+  bool has_this_properties_;
+  bool has_globals_;
 };
 
 
 // The V8 compiler
 //
 // General strategy: Source code is translated into an anonymous function w/o
 // parameters which then can be executed. If the source code contains other
 // functions, they will be compiled and allocated as part of the compilation
 // of the source code.
 
@@ skipping 53 matching lines @@
       FrameElement::ClearConstantList();
       Result::ClearConstantList();
     }
   }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_