--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/ir/MemoryRead.java	Thu Jun 16 20:09:26 2011 +0200
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 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.oracle.max.graal.compiler.ir;
+
+import com.oracle.max.graal.compiler.debug.*;
+import com.oracle.max.graal.graph.*;
+import com.sun.cri.ci.*;
+
+
+public final class MemoryRead extends Instruction {
+    private static final int INPUT_COUNT = 2;
+    private static final int INPUT_NODE = 0;
+    private static final int INPUT_GUARD = 1;
+
+    private static final int SUCCESSOR_COUNT = 0;
+
+    private int displacement;
+    private CiKind valueKind;
+
+    /**
+     * The instruction that produces the object tested against null.
+     */
+     public Value location() {
+        return (Value) inputs().get(super.inputCount() + INPUT_NODE);
+    }
+
+    public Value setLocation(Value n) {
+        return (Value) inputs().set(super.inputCount() + INPUT_NODE, n);
+    }
+
+    /**
+     * The instruction that produces the object tested against null.
+     */
+     public FloatingNode guard() {
+        return (FloatingNode) inputs().get(super.inputCount() + INPUT_GUARD);
+    }
+
+    public FloatingNode setGuard(FloatingNode n) {
+        return (FloatingNode) inputs().set(super.inputCount() + INPUT_GUARD, n);
+    }
+
+    public int displacement() {
+        return displacement;
+    }
+
+    public CiKind valueKind() {
+        return valueKind;
+    }
+
+    public MemoryRead(CiKind kind, int displacement, Graph graph) {
+        super(kind.stackKind(), INPUT_COUNT, SUCCESSOR_COUNT, graph);
+        this.displacement = displacement;
+        this.valueKind = kind;
+    }
+
+    @Override
+    public void accept(ValueVisitor v) {
+        v.visitMemoryRead(this);
+    }
+
+    @Override
+    public void print(LogStream out) {
+        out.print("mem read from ").print(location());
+    }
+
+    @Override
+    public Node copy(Graph into) {
+        return new MemoryRead(super.kind, displacement(), into);
+    }
+}