Create interface for host backends

graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/target/HostBackend.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2014, 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.
+ */
+package com.oracle.graal.compiler.target;
+
+import com.oracle.graal.api.code.*;
+
+public interface HostBackend {
+    NativeFunctionInterface getNativeFunctionInterface();
+}

graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotHostBackend.java

@@ -28,6 +28,7 @@
 
 import com.oracle.graal.api.code.*;
 import com.oracle.graal.api.meta.*;
+import com.oracle.graal.compiler.target.*;
 import com.oracle.graal.debug.*;
 import com.oracle.graal.debug.Debug.Scope;
 import com.oracle.graal.hotspot.HotSpotReplacementsImpl.*;
@@ -37,7 +38,7 @@
 /**
  * Common functionality of HotSpot host backends.
  */
-public abstract class HotSpotHostBackend extends HotSpotBackend {
+public abstract class HotSpotHostBackend extends HotSpotBackend implements HostBackend {
 
     /**
      * This will be 0 if stack banging is disabled.