8232006: Remove dead code from klassVtable

Reviewed-by: coleenp, jiangli, lfoltan

Author: cl4es

src/hotspot/share/oops/klassVtable.cpp

@@ -128,11 +128,6 @@ void klassVtable::compute_vtable_size_and_num_mirandas(
   *vtable_length_ret = vtable_length;
 }
 
-int klassVtable::index_of(Method* m, int len) const {
-  assert(m->has_vtable_index(), "do not ask this of non-vtable methods");
-  return m->vtable_index();
-}
-
 // Copy super class's vtable to the first part (prefix) of this class's vtable,
 // and return the number of entries copied.  Expects that 'super' is the Java
 // super class (arrays can have "array" super classes that must be skipped).
@@ -169,7 +164,6 @@ void klassVtable::initialize_vtable(bool checkconstraints, TRAPS) {
 
   // Note:  Arrays can have intermediate array supers.  Use java_super to skip them.
   InstanceKlass* super = _klass->java_super();
-  int nofNewEntries = 0;
 
   bool is_shared = _klass->is_shared();
 
@@ -1029,15 +1023,6 @@ void klassVtable::dump_vtable() {
 }
 #endif // INCLUDE_JVMTI
 
-// CDS/RedefineClasses support - clear vtables so they can be reinitialized
-void klassVtable::clear_vtable() {
-  for (int i = 0; i < _length; i++) table()[i].clear();
-}
-
-bool klassVtable::is_initialized() {
-  return _length == 0 || table()[0].method() != NULL;
-}
-
 //-----------------------------------------------------------------------------------------
 // Itable code
 
@@ -1468,31 +1453,6 @@ void klassItable::setup_itable_offset_table(InstanceKlass* klass) {
 #endif
 }
 
-
-// inverse to itable_index
-Method* klassItable::method_for_itable_index(InstanceKlass* intf, int itable_index) {
-  assert(intf->is_interface(), "sanity check");
-  assert(intf->verify_itable_index(itable_index), "");
-  Array<Method*>* methods = InstanceKlass::cast(intf)->methods();
-
-  if (itable_index < 0 || itable_index >= method_count_for_interface(intf))
-    return NULL;                // help caller defend against bad indices
-
-  int index = itable_index;
-  Method* m = methods->at(index);
-  int index2 = -1;
-  while (!m->has_itable_index() ||
-         (index2 = m->itable_index()) != itable_index) {
-    assert(index2 < itable_index, "monotonic");
-    if (++index == methods->length())
-      return NULL;
-    m = methods->at(index);
-  }
-  assert(m->itable_index() == itable_index, "correct inverse");
-
-  return m;
-}
-
 void klassVtable::verify(outputStream* st, bool forced) {
   // make sure table is initialized
   if (!Universe::is_fully_initialized()) return;

src/hotspot/share/oops/klassVtable.hpp

@@ -48,13 +48,6 @@ class klassVtable {
   int          _verify_count;     // to make verify faster
 #endif
 
-  // Ordering important, so greater_than (>) can be used as an merge operator.
-  enum AccessType {
-    acc_private         = 0,
-    acc_package_private = 1,
-    acc_publicprotected = 2
-  };
-
  public:
   klassVtable(Klass* klass, void* base, int length) : _klass(klass) {
     _tableOffset = (address)base - (address)klass; _length = length;
@@ -66,22 +59,12 @@ class klassVtable {
   int length() const              { return _length; }
   inline Method* method_at(int i) const;
   inline Method* unchecked_method_at(int i) const;
-  inline Method** adr_method_at(int i) const;
 
   // searching; all methods return -1 if not found
-  int index_of(Method* m) const                         { return index_of(m, _length); }
   int index_of_miranda(Symbol* name, Symbol* signature);
 
   void initialize_vtable(bool checkconstraints, TRAPS);   // initialize vtable of a new klass
 
-  // CDS/RedefineClasses support - clear vtables so they can be reinitialized
-  // at dump time.  Clearing gives us an easy way to tell if the vtable has
-  // already been reinitialized at dump time (see dump.cpp).  Vtables can
-  // be initialized at run time by RedefineClasses so dumping the right order
-  // is necessary.
-  void clear_vtable();
-  bool is_initialized();
-
   // computes vtable length (in words) and the number of miranda methods
   static void compute_vtable_size_and_num_mirandas(int* vtable_length,
                                                    int* num_new_mirandas,
@@ -125,7 +108,6 @@ class klassVtable {
  private:
   void copy_vtable_to(vtableEntry* start);
   int  initialize_from_super(Klass* super);
-  int  index_of(Method* m, int len) const; // same as index_of, but search only up to len
   void put_method_at(Method* m, int index);
   static bool needs_new_vtable_entry(const methodHandle& m,
                                      const Klass* super,
@@ -223,12 +205,6 @@ inline Method* klassVtable::unchecked_method_at(int i) const {
   return table()[i].method();
 }
 
-inline Method** klassVtable::adr_method_at(int i) const {
-  // Allow one past the last entry to be referenced; useful for loop bounds.
-  assert(i >= 0 && i <= _length, "index out of bounds");
-  return (Method**)(address(table() + i) + vtableEntry::method_offset_in_bytes());
-}
-
 // --------------------------------------------------------------------------------
 class klassItable;
 class itableMethodEntry;
@@ -333,9 +309,6 @@ class klassItable {
   static int compute_itable_size(Array<InstanceKlass*>* transitive_interfaces);
   static void setup_itable_offset_table(InstanceKlass* klass);
 
-  // Resolving of method to index
-  static Method* method_for_itable_index(InstanceKlass* klass, int itable_index);
-
   // Debugging/Statistics
   static void print_statistics() PRODUCT_RETURN;
  private: