--- a/hotspot/src/share/vm/oops/instanceKlass.hpp	Fri Jan 06 20:09:20 2012 -0800
+++ b/hotspot/src/share/vm/oops/instanceKlass.hpp	Wed Jan 11 19:54:34 2012 -0800
@@ -231,6 +231,10 @@
   u2              _java_fields_count;    // The number of declared Java fields
   int             _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks
 
+  bool            _is_marked_dependent;  // used for marking during flushing and deoptimization
+  bool            _rewritten;            // methods rewritten.
+  bool            _has_nonstatic_fields; // for sizing with UseCompressedOops
+  bool            _should_verify_class;  // allow caching of preverification
   u2              _minor_version;        // minor version number of class file
   u2              _major_version;        // major version number of class file
   Thread*         _init_thread;          // Pointer to current thread doing initialization (to handle recusive initialization)
@@ -261,19 +265,6 @@
   // _idnum_allocated_count.
   u1              _init_state;                    // state of class
 
-  // Compact the following four boolean flags into 1-bit each.  These four flags
-  // were defined as separate boolean fields and each was 1-byte before. Since
-  // there are 2 bytes unused after the _idnum_allocated_count field, place the
-  // _misc_flags field after _idnum_allocated_count to utilize the unused bits
-  // and save total 4-bytes.
-  enum {
-    IS_MARKED_DEPENDENT  = 0x1, // used for marking during flushing and deoptimization
-    REWRITTEN            = 0x2, // methods rewritten.
-    HAS_NONSTATIC_FIELDS = 0x4, // for sizing with UseCompressedOops
-    SHOULD_VERIFY_CLASS  = 0x8  // allow caching of preverification
-  };
-  u1              _misc_flags;
-
   // embedded Java vtable follows here
   // embedded Java itables follows here
   // embedded static fields follows here
@@ -283,14 +274,8 @@
   friend class SystemDictionary;
 
  public:
-  bool has_nonstatic_fields() const        { return (_misc_flags & HAS_NONSTATIC_FIELDS) != 0; }
-  void set_has_nonstatic_fields(bool b) {
-    if (b) {
-      _misc_flags |= HAS_NONSTATIC_FIELDS;
-    } else {
-      _misc_flags &= ~HAS_NONSTATIC_FIELDS;
-    }
-  }
+  bool has_nonstatic_fields() const        { return _has_nonstatic_fields; }
+  void set_has_nonstatic_fields(bool b)    { _has_nonstatic_fields = b; }
 
   // field sizes
   int nonstatic_field_size() const         { return _nonstatic_field_size; }
@@ -398,23 +383,15 @@
   bool is_in_error_state() const           { return _init_state == initialization_error; }
   bool is_reentrant_initialization(Thread *thread)  { return thread == _init_thread; }
   ClassState  init_state()                 { return (ClassState)_init_state; }
-  bool is_rewritten() const                { return (_misc_flags & REWRITTEN) != 0; }
+  bool is_rewritten() const                { return _rewritten; }
 
   // defineClass specified verification
-  bool should_verify_class() const         { return (_misc_flags & SHOULD_VERIFY_CLASS) != 0; }
-  void set_should_verify_class(bool value) {
-    if (value) {
-      _misc_flags |= SHOULD_VERIFY_CLASS;
-    } else {
-      _misc_flags &= ~SHOULD_VERIFY_CLASS;
-    }
-  }
-
+  bool should_verify_class() const         { return _should_verify_class; }
+  void set_should_verify_class(bool value) { _should_verify_class = value; }
 
   // marking
-  bool is_marked_dependent() const         { return (_misc_flags & IS_MARKED_DEPENDENT) != 0; }
-  void set_is_marked_dependent()           { _misc_flags |= IS_MARKED_DEPENDENT; }
-  void clear_is_marked_dependent()         { _misc_flags &= ~IS_MARKED_DEPENDENT; }
+  bool is_marked_dependent() const         { return _is_marked_dependent; }
+  void set_is_marked_dependent(bool value) { _is_marked_dependent = value; }
 
   // initialization (virtuals from Klass)
   bool should_be_initialized() const;  // means that initialize should be called
@@ -784,7 +761,7 @@
 #else
   void set_init_state(ClassState state) { _init_state = (u1)state; }
 #endif
-  void set_rewritten()                  { _misc_flags |= REWRITTEN; }
+  void set_rewritten()                  { _rewritten = true; }
   void set_init_thread(Thread *thread)  { _init_thread = thread; }
 
   u2 idnum_allocated_count() const      { return _idnum_allocated_count; }