--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/jvmci/jvmciCompilerToVM.hpp	Thu May 28 15:36:48 2015 +0200
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2011, 2013, 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_JVMCI_JVMCI_COMPILER_TO_VM_HPP
+#define SHARE_VM_JVMCI_JVMCI_COMPILER_TO_VM_HPP
+
+#include "prims/jni.h"
+#include "runtime/javaCalls.hpp"
+
+class CompilerToVM {
+public:
+  /**
+   * Tag bits used by lookupKlassInPool to distinguish the types in Java.
+   */
+  enum Tags {
+    KLASS_TAG = 0x0,
+    SYMBOL_TAG = 0x1
+  };
+
+  static intptr_t tag_pointer(Klass* klass) {
+    return ((intptr_t) klass) | KLASS_TAG;
+  }
+
+  static intptr_t tag_pointer(Symbol* symbol) {
+    return ((intptr_t) symbol) | SYMBOL_TAG;
+  }
+
+  // nothing here - no need to define the jni method implementations in a header file
+};
+
+extern JNINativeMethod CompilerToVM_methods[];
+int CompilerToVM_methods_count();
+
+inline Method* asMethod(jlong metaspaceMethod) {
+  return (Method*) (address) metaspaceMethod;
+}
+
+inline MethodData* asMethodData(jlong metaspaceMethodData) {
+  return (MethodData*) (address) metaspaceMethodData;
+}
+
+inline Klass* asKlass(jlong metaspaceKlass) {
+  return (Klass*) (address) metaspaceKlass;
+}
+
+class JavaArgumentUnboxer : public SignatureIterator {
+ protected:
+  JavaCallArguments*  _jca;
+  arrayOop _args;
+  int _index;
+
+  oop next_arg(BasicType expectedType) {
+    assert(_index < _args->length(), "out of bounds");
+    oop arg=((objArrayOop) (_args))->obj_at(_index++);
+    assert(expectedType == T_OBJECT || java_lang_boxing_object::is_instance(arg, expectedType), "arg type mismatch");
+    return arg;
+  }
+
+ public:
+  JavaArgumentUnboxer(Symbol* signature, JavaCallArguments*  jca, arrayOop args, bool is_static) : SignatureIterator(signature) {
+    this->_return_type = T_ILLEGAL;
+    _jca = jca;
+    _index = 0;
+    _args = args;
+    if (!is_static) {
+      _jca->push_oop(next_arg(T_OBJECT));
+    }
+    iterate();
+    assert(_index == args->length(), "arg count mismatch with signature");
+  }
+
+  inline void do_bool()   { if (!is_return_type()) _jca->push_int(next_arg(T_BOOLEAN)->bool_field(java_lang_boxing_object::value_offset_in_bytes(T_BOOLEAN))); }
+  inline void do_char()   { if (!is_return_type()) _jca->push_int(next_arg(T_CHAR)->char_field(java_lang_boxing_object::value_offset_in_bytes(T_CHAR))); }
+  inline void do_short()  { if (!is_return_type()) _jca->push_int(next_arg(T_SHORT)->short_field(java_lang_boxing_object::value_offset_in_bytes(T_SHORT))); }
+  inline void do_byte()   { if (!is_return_type()) _jca->push_int(next_arg(T_BYTE)->byte_field(java_lang_boxing_object::value_offset_in_bytes(T_BYTE))); }
+  inline void do_int()    { if (!is_return_type()) _jca->push_int(next_arg(T_INT)->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT))); }
+
+  inline void do_long()   { if (!is_return_type()) _jca->push_long(next_arg(T_LONG)->long_field(java_lang_boxing_object::value_offset_in_bytes(T_LONG))); }
+  inline void do_float()  { if (!is_return_type()) _jca->push_float(next_arg(T_FLOAT)->float_field(java_lang_boxing_object::value_offset_in_bytes(T_FLOAT))); }
+  inline void do_double() { if (!is_return_type()) _jca->push_double(next_arg(T_DOUBLE)->double_field(java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE))); }
+
+  inline void do_object() { _jca->push_oop(next_arg(T_OBJECT)); }
+  inline void do_object(int begin, int end) { if (!is_return_type()) _jca->push_oop(next_arg(T_OBJECT)); }
+  inline void do_array(int begin, int end)  { if (!is_return_type()) _jca->push_oop(next_arg(T_OBJECT)); }
+  inline void do_void()                     { }
+};
+
+#endif // SHARE_VM_JVMCI_JVMCI_COMPILER_TO_VM_HPP