Put direct code pointers into JSFunction objects. This is a first step...

src/objects.h

 // Copyright 2006-2009 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 3590 matching lines @@
   void JSFunctionVerify();
 #endif
 
   // Returns the number of allocated literals.
   inline int NumberOfLiterals();
 
   // Retrieve the global context from a function's literal array.
   static Context* GlobalContextFromLiterals(FixedArray* literals);
 
   // Layout descriptors.
-  static const int kPrototypeOrInitialMapOffset = JSObject::kHeaderSize;
+  static const int kCodeOffset = JSObject::kHeaderSize;
+  static const int kPrototypeOrInitialMapOffset =
+      kCodeOffset + kPointerSize;
   static const int kSharedFunctionInfoOffset =
       kPrototypeOrInitialMapOffset + kPointerSize;
   static const int kContextOffset = kSharedFunctionInfoOffset + kPointerSize;
   static const int kLiteralsOffset = kContextOffset + kPointerSize;
   static const int kSize = kLiteralsOffset + kPointerSize;
 
   // Layout of the literals array.
   static const int kLiteralsPrefixSize = 1;
   static const int kLiteralGlobalContextIndex = 0;
  private:
@@ skipping 1743 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_