--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/GraalCompiler/src/com/sun/c1x/target/Backend.java	Wed Apr 27 11:50:44 2011 +0200
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2009, 2010, 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.sun.c1x.target;
+
+import java.lang.reflect.*;
+
+import com.sun.c1x.*;
+import com.sun.c1x.asm.*;
+import com.sun.c1x.gen.*;
+import com.sun.c1x.globalstub.*;
+import com.sun.c1x.lir.*;
+import com.sun.cri.ci.*;
+import com.sun.cri.ri.*;
+import com.sun.cri.xir.*;
+
+/**
+ * The {@code Backend} class represents a compiler backend for C1X.
+ *
+ * @author Ben L. Titzer
+ */
+public abstract class Backend {
+    public final C1XCompiler compiler;
+
+    protected Backend(C1XCompiler compiler) {
+        this.compiler = compiler;
+    }
+
+    public static Backend create(CiArchitecture arch, C1XCompiler compiler) {
+        String className = arch.getClass().getName() + "Backend";
+        try {
+            Class<?> c = Class.forName(className);
+            Constructor<?> cons = c.getDeclaredConstructor(C1XCompiler.class);
+            return (Backend) cons.newInstance(compiler);
+        } catch (Exception e) {
+            throw new Error("Could instantiate " + className, e);
+        }
+    }
+
+    public abstract FrameMap newFrameMap(RiMethod method, int numberOfLocks);
+    public abstract LIRGenerator newLIRGenerator(C1XCompilation compilation);
+    public abstract LIRAssembler newLIRAssembler(C1XCompilation compilation);
+    public abstract AbstractAssembler newAssembler(RiRegisterConfig registerConfig);
+    public abstract GlobalStubEmitter newGlobalStubEmitter();
+    public abstract CiXirAssembler newXirAssembler();
+}