Move the is_pregenerated flag so it does not overlap other flags.

src/objects.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 3870 matching lines @@
 
   // Flags layout.  BitField<type, shift, size>.
   class ICStateField: public BitField<InlineCacheState, 0, 3> {};
   class TypeField: public BitField<PropertyType, 3, 4> {};
   class KindField: public BitField<Kind, 7, 4> {};
   class CacheHolderField: public BitField<InlineCacheHolderFlag, 11, 1> {};
   class ExtraICStateField: public BitField<ExtraICState, 12, 2> {};
   class IsPregeneratedField: public BitField<bool, 14, 1> {};
 
   // Signed field cannot be encoded using the BitField class.
-  static const int kArgumentsCountShift = 14;
+  static const int kArgumentsCountShift = 15;
   static const int kArgumentsCountMask = ~((1 << kArgumentsCountShift) - 1);
 
   static const int kFlagsNotUsedInLookup =
       TypeField::kMask | CacheHolderField::kMask;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(Code);
 };
 
 
@@ skipping 3653 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_