--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/ci/ciMethodType.hpp	Mon Oct 01 14:50:10 2012 -0700
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2012, 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.
+ *
+ */
+
+#ifndef SHARE_VM_CI_CIMETHODTYPE_HPP
+#define SHARE_VM_CI_CIMETHODTYPE_HPP
+
+#include "ci/ciInstance.hpp"
+#include "ci/ciUtilities.hpp"
+#include "classfile/javaClasses.hpp"
+
+// ciMethodType
+//
+// The class represents a java.lang.invoke.MethodType object.
+class ciMethodType : public ciInstance {
+private:
+  ciType* class_to_citype(oop klass_oop) const {
+    if (java_lang_Class::is_primitive(klass_oop)) {
+      BasicType bt = java_lang_Class::primitive_type(klass_oop);
+      return ciType::make(bt);
+    } else {
+      Klass* k = java_lang_Class::as_Klass(klass_oop);
+      return CURRENT_ENV->get_klass(k);
+    }
+  }
+
+public:
+  ciMethodType(instanceHandle h_i) : ciInstance(h_i) {}
+
+  // What kind of ciObject is this?
+  bool is_method_type() const { return true; }
+
+  ciType* rtype() const {
+    GUARDED_VM_ENTRY(
+      oop rtype = java_lang_invoke_MethodType::rtype(get_oop());
+      return class_to_citype(rtype);
+    )
+  }
+
+  int ptype_count() const {
+    GUARDED_VM_ENTRY(return java_lang_invoke_MethodType::ptype_count(get_oop());)
+  }
+
+  int ptype_slot_count() const {
+    GUARDED_VM_ENTRY(return java_lang_invoke_MethodType::ptype_slot_count(get_oop());)
+  }
+
+  ciType* ptype_at(int index) const {
+    GUARDED_VM_ENTRY(
+      oop ptype = java_lang_invoke_MethodType::ptype(get_oop(), index);
+      return class_to_citype(ptype);
+    )
+  }
+};
+
+#endif // SHARE_VM_CI_CIMETHODTYPE_HPP