--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/Compiler/src/com/sun/c1x/ir/AccessArray.java	Wed Apr 27 11:43:22 2011 +0200
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2009, 2011, 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.ir;
+
+import com.sun.c1x.value.*;
+import com.sun.cri.ci.*;
+
+/**
+ * This the base class of all array operations.
+ *
+ * @author Ben L. Titzer
+ */
+public abstract class AccessArray extends StateSplit {
+
+    protected Value array;
+
+    /**
+     * Creates a new AccessArray instruction.
+     * @param kind the type of the result of this instruction
+     * @param array the instruction that produces the array object value
+     * @param stateBefore the frame state before the instruction
+     */
+    public AccessArray(CiKind kind, Value array, FrameState stateBefore) {
+        super(kind, stateBefore);
+        this.array = array;
+        if (array.isNonNull()) {
+            eliminateNullCheck();
+        }
+    }
+
+    /**
+     * Gets the instruction that produces the array object.
+     * @return the instruction that produces the array object
+     */
+    public Value array() {
+        return array;
+    }
+
+    /**
+     * Clears the state if this instruction can (no longer) trap.
+     */
+    @Override
+    public void runtimeCheckCleared() {
+        if (!canTrap()) {
+            clearState();
+        }
+    }
+
+    @Override
+    public void inputValuesDo(ValueClosure closure) {
+        array = closure.apply(array);
+    }
+}