--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/ci/ciKlass.cpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,235 @@
+/*
+ * Copyright 1999-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_ciKlass.cpp.incl"
+
+// ciKlass
+//
+// This class represents a klassOop in the HotSpot virtual
+// machine.
+
+// ------------------------------------------------------------------
+// ciKlass::ciKlass
+ciKlass::ciKlass(KlassHandle h_k) : ciType(h_k) {
+  assert(get_oop()->is_klass(), "wrong type");
+  Klass* k = get_Klass();
+  _layout_helper = k->layout_helper();
+  symbolOop klass_name = k->name();
+  assert(klass_name != NULL, "wrong ciKlass constructor");
+  _name = CURRENT_ENV->get_object(klass_name)->as_symbol();
+}
+
+// ------------------------------------------------------------------
+// ciKlass::ciKlass
+//
+// Nameless klass variant.
+ciKlass::ciKlass(KlassHandle h_k, ciSymbol* name) : ciType(h_k) {
+  assert(get_oop()->is_klass(), "wrong type");
+  _name = name;
+  _layout_helper = Klass::_lh_neutral_value;
+}
+
+// ------------------------------------------------------------------
+// ciKlass::ciKlass
+//
+// Unloaded klass variant.
+ciKlass::ciKlass(ciSymbol* name, ciKlass* klass) : ciType(klass) {
+  _name = name;
+  _layout_helper = Klass::_lh_neutral_value;
+}
+
+// ------------------------------------------------------------------
+// ciKlass::is_subtype_of
+bool ciKlass::is_subtype_of(ciKlass* that) {
+  assert(is_loaded() && that->is_loaded(), "must be loaded");
+  assert(is_java_klass() && that->is_java_klass(), "must be java klasses");
+  // Check to see if the klasses are identical.
+  if (this == that) {
+    return true;
+  }
+
+  VM_ENTRY_MARK;
+  Klass* this_klass = get_Klass();
+  klassOop that_klass = that->get_klassOop();
+  bool result = this_klass->is_subtype_of(that_klass);
+
+  return result;
+}
+
+// ------------------------------------------------------------------
+// ciKlass::is_subclass_of
+bool ciKlass::is_subclass_of(ciKlass* that) {
+  assert(is_loaded() && that->is_loaded(), "must be loaded");
+  assert(is_java_klass() && that->is_java_klass(), "must be java klasses");
+  // Check to see if the klasses are identical.
+
+  VM_ENTRY_MARK;
+  Klass* this_klass = get_Klass();
+  klassOop that_klass = that->get_klassOop();
+  bool result = this_klass->is_subclass_of(that_klass);
+
+  return result;
+}
+
+// ------------------------------------------------------------------
+// ciKlass::super_depth
+juint ciKlass::super_depth() {
+  assert(is_loaded(), "must be loaded");
+  assert(is_java_klass(), "must be java klasses");
+
+  VM_ENTRY_MARK;
+  Klass* this_klass = get_Klass();
+  return this_klass->super_depth();
+}
+
+// ------------------------------------------------------------------
+// ciKlass::super_check_offset
+juint ciKlass::super_check_offset() {
+  assert(is_loaded(), "must be loaded");
+  assert(is_java_klass(), "must be java klasses");
+
+  VM_ENTRY_MARK;
+  Klass* this_klass = get_Klass();
+  return this_klass->super_check_offset();
+}
+
+// ------------------------------------------------------------------
+// ciKlass::super_of_depth
+ciKlass* ciKlass::super_of_depth(juint i) {
+  assert(is_loaded(), "must be loaded");
+  assert(is_java_klass(), "must be java klasses");
+
+  VM_ENTRY_MARK;
+  Klass* this_klass = get_Klass();
+  klassOop super = this_klass->primary_super_of_depth(i);
+  return (super != NULL) ? CURRENT_THREAD_ENV->get_object(super)->as_klass() : NULL;
+}
+
+// ------------------------------------------------------------------
+// ciKlass::can_be_primary_super
+bool ciKlass::can_be_primary_super() {
+  assert(is_loaded(), "must be loaded");
+  assert(is_java_klass(), "must be java klasses");
+
+  VM_ENTRY_MARK;
+  Klass* this_klass = get_Klass();
+  return this_klass->can_be_primary_super();
+}
+
+// ------------------------------------------------------------------
+// ciKlass::least_common_ancestor
+//
+// Get the shared parent of two klasses.
+//
+// Implementation note: this method currently goes "over the wall"
+// and does all of the work on the VM side.  It could be rewritten
+// to use the super() method and do all of the work (aside from the
+// lazy computation of super()) in native mode.  This may be
+// worthwhile if the compiler is repeatedly requesting the same lca
+// computation or possibly if most of the superklasses have already
+// been created as ciObjects anyway.  Something to think about...
+ciKlass*
+ciKlass::least_common_ancestor(ciKlass* that) {
+  assert(is_loaded() && that->is_loaded(), "must be loaded");
+  assert(is_java_klass() && that->is_java_klass(), "must be java klasses");
+  // Check to see if the klasses are identical.
+  if (this == that) {
+    return this;
+  }
+
+  VM_ENTRY_MARK;
+  Klass* this_klass = get_Klass();
+  Klass* that_klass = that->get_Klass();
+  Klass* lca        = this_klass->LCA(that_klass);
+
+  // Many times the LCA will be either this_klass or that_klass.
+  // Treat these as special cases.
+  if (lca == that_klass) {
+    return that;
+  }
+  if (this_klass == lca) {
+    return this;
+  }
+
+  // Create the ciInstanceKlass for the lca.
+  ciKlass* result =
+    CURRENT_THREAD_ENV->get_object(lca->as_klassOop())->as_klass();
+
+  return result;
+}
+
+// ------------------------------------------------------------------
+// ciKlass::find_klass
+//
+// Find a klass using this klass's class loader.
+ciKlass* ciKlass::find_klass(ciSymbol* klass_name) {
+  assert(is_loaded(), "cannot find_klass through an unloaded klass");
+  return CURRENT_ENV->get_klass_by_name(this,
+                                        klass_name, false);
+}
+
+// ------------------------------------------------------------------
+// ciKlass::java_mirror
+ciInstance* ciKlass::java_mirror() {
+  GUARDED_VM_ENTRY(
+    oop java_mirror = get_Klass()->java_mirror();
+    return CURRENT_ENV->get_object(java_mirror)->as_instance();
+  )
+}
+
+// ------------------------------------------------------------------
+// ciKlass::modifier_flags
+jint ciKlass::modifier_flags() {
+  assert(is_loaded(), "not loaded");
+  GUARDED_VM_ENTRY(
+    return get_Klass()->modifier_flags();
+  )
+}
+
+// ------------------------------------------------------------------
+// ciKlass::access_flags
+jint ciKlass::access_flags() {
+  assert(is_loaded(), "not loaded");
+  GUARDED_VM_ENTRY(
+    return get_Klass()->access_flags().as_int();
+  )
+}
+
+// ------------------------------------------------------------------
+// ciKlass::print_impl
+//
+// Implementation of the print method
+void ciKlass::print_impl(outputStream* st) {
+  st->print(" name=");
+  print_name_on(st);
+}
+
+// ------------------------------------------------------------------
+// ciKlass::print_name
+//
+// Print the name of this klass
+void ciKlass::print_name_on(outputStream* st) {
+  name()->print_symbol_on(st);
+}