--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/ci/ciInstance.cpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 1999, 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "ci/ciConstant.hpp"
+#include "ci/ciField.hpp"
+#include "ci/ciInstance.hpp"
+#include "ci/ciInstanceKlass.hpp"
+#include "ci/ciUtilities.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "oops/oop.inline.hpp"
+
+// ciInstance
+//
+// This class represents an instanceOop in the HotSpot virtual
+// machine.
+
+// ------------------------------------------------------------------
+// ciObject::java_mirror_type
+ciType* ciInstance::java_mirror_type() {
+  VM_ENTRY_MARK;
+  oop m = get_oop();
+  // Return NULL if it is not java.lang.Class.
+  if (m == NULL || m->klass() != SystemDictionary::Class_klass()) {
+    return NULL;
+  }
+  // Return either a primitive type or a klass.
+  if (java_lang_Class::is_primitive(m)) {
+    return ciType::make(java_lang_Class::primitive_type(m));
+  } else {
+    Klass* k = java_lang_Class::as_Klass(m);
+    assert(k != NULL, "");
+    return CURRENT_THREAD_ENV->get_klass(k);
+  }
+}
+
+// ------------------------------------------------------------------
+// ciInstance::field_value_impl
+ciConstant ciInstance::field_value_impl(BasicType field_btype, int offset) {
+  oop obj = get_oop();
+  assert(obj != NULL, "bad oop");
+  switch(field_btype) {
+    case T_BYTE:    return ciConstant(field_btype, obj->byte_field(offset));
+    case T_CHAR:    return ciConstant(field_btype, obj->char_field(offset));
+    case T_SHORT:   return ciConstant(field_btype, obj->short_field(offset));
+    case T_BOOLEAN: return ciConstant(field_btype, obj->bool_field(offset));
+    case T_INT:     return ciConstant(field_btype, obj->int_field(offset));
+    case T_FLOAT:   return ciConstant(obj->float_field(offset));
+    case T_DOUBLE:  return ciConstant(obj->double_field(offset));
+    case T_LONG:    return ciConstant(obj->long_field(offset));
+    case T_OBJECT:  // fall through
+    case T_ARRAY: {
+      oop o = obj->obj_field(offset);
+
+      // A field will be "constant" if it is known always to be
+      // a non-null reference to an instance of a particular class,
+      // or to a particular array.  This can happen even if the instance
+      // or array is not perm.  In such a case, an "unloaded" ciArray
+      // or ciInstance is created.  The compiler may be able to use
+      // information about the object's class (which is exact) or length.
+
+      if (o == NULL) {
+        return ciConstant(field_btype, ciNullObject::make());
+      } else {
+        return ciConstant(field_btype, CURRENT_ENV->get_object(o));
+      }
+    }
+    default:
+      fatal("no field value: %s", type2name(field_btype));
+      return ciConstant();
+  }
+}
+
+// ------------------------------------------------------------------
+// ciInstance::field_value
+//
+// Constant value of a field.
+ciConstant ciInstance::field_value(ciField* field) {
+  assert(is_loaded(), "invalid access - must be loaded");
+  assert(field->holder()->is_loaded(), "invalid access - holder must be loaded");
+  assert(field->is_static() || klass()->is_subclass_of(field->holder()), "invalid access - must be subclass");
+
+  GUARDED_VM_ENTRY(return field_value_impl(field->type()->basic_type(), field->offset());)
+}
+
+// ------------------------------------------------------------------
+// ciInstance::field_value_by_offset
+//
+// Constant value of a field at the specified offset.
+ciConstant ciInstance::field_value_by_offset(int field_offset) {
+  ciInstanceKlass* ik = klass()->as_instance_klass();
+  ciField* field = ik->get_field_by_offset(field_offset, false);
+  if (field == NULL)
+    return ciConstant();  // T_ILLEGAL
+  return field_value(field);
+}
+
+// ------------------------------------------------------------------
+// ciInstance::print_impl
+//
+// Implementation of the print method.
+void ciInstance::print_impl(outputStream* st) {
+  st->print(" type=");
+  klass()->print(st);
+}
+
+
+ciKlass* ciInstance::java_lang_Class_klass() {
+  VM_ENTRY_MARK;
+  return CURRENT_ENV->get_metadata(java_lang_Class::as_Klass(get_oop()))->as_klass();
+}