--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.graal.compiler/src/com/sun/c1x/ir/Value.java	Wed Jun 08 08:42:25 2011 +0200
@@ -0,0 +1,210 @@
+/*
+ * 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 java.util.*;
+
+import com.oracle.graal.graph.*;
+import com.sun.c1x.debug.*;
+import com.sun.cri.ci.*;
+import com.sun.cri.ri.*;
+
+/**
+ * This class represents a value within the HIR graph, including local variables, phis, and
+ * all other instructions.
+ */
+public abstract class Value extends Node {
+
+    /**
+     * The kind of this value. This is {@link CiKind#Void} for instructions that produce no value.
+     * This kind is guaranteed to be a {@linkplain CiKind#stackKind() stack kind}.
+     */
+    public final CiKind kind;
+
+    protected CiValue operand = CiValue.IllegalValue;
+
+    /**
+     * Creates a new value with the specified kind.
+     * @param kind the type of this value
+     * @param inputCount
+     * @param successorCount
+     * @param graph
+     */
+    public Value(CiKind kind, int inputCount, int successorCount, Graph graph) {
+        super(inputCount, successorCount, graph);
+        assert kind == kind.stackKind() : kind + " != " + kind.stackKind();
+        this.kind = kind;
+    }
+
+    ///////////////
+    // TODO: remove when Value class changes are completed
+
+    @Override
+    protected Object clone() throws CloneNotSupportedException {
+        throw new CloneNotSupportedException();
+    }
+
+    /**
+     * Checks whether this value is a constant (i.e. it is of type {@link Constant}.
+     * @return {@code true} if this value is a constant
+     */
+    public final boolean isConstant() {
+        return this instanceof Constant;
+    }
+
+    /**
+     * Checks whether this value represents the null constant.
+     * @return {@code true} if this value represents the null constant
+     */
+    public final boolean isNullConstant() {
+        return this instanceof Constant && ((Constant) this).value.isNull();
+    }
+
+    /**
+     * Convert this value to a constant if it is a constant, otherwise return null.
+     * @return the {@link CiConstant} represented by this value if it is a constant; {@code null}
+     * otherwise
+     */
+    public final CiConstant asConstant() {
+        if (this instanceof Constant) {
+            return ((Constant) this).value;
+        }
+        return null;
+    }
+
+    /**
+     * Gets the LIR operand associated with this instruction.
+     * @return the LIR operand for this instruction
+     */
+    public final CiValue operand() {
+        return operand;
+    }
+
+    /**
+     * Sets the LIR operand associated with this instruction.
+     * @param operand the operand to associate with this instruction
+     */
+    public final void setOperand(CiValue operand) {
+        assert this.operand.isIllegal() : "operand cannot be set twice";
+        assert operand != null && operand.isLegal() : "operand must be legal";
+        assert operand.kind.stackKind() == this.kind;
+        this.operand = operand;
+    }
+
+    /**
+     * Clears the LIR operand associated with this instruction.
+     */
+    public final void clearOperand() {
+        this.operand = CiValue.IllegalValue;
+    }
+
+    /**
+     * Computes the exact type of the result of this instruction, if possible.
+     * @return the exact type of the result of this instruction, if it is known; {@code null} otherwise
+     */
+    public RiType exactType() {
+        return null; // default: unknown exact type
+    }
+
+    /**
+     * Computes the declared type of the result of this instruction, if possible.
+     * @return the declared type of the result of this instruction, if it is known; {@code null} otherwise
+     */
+    public RiType declaredType() {
+        return null; // default: unknown declared type
+    }
+
+    /**
+     * Apply the specified closure to all the input values of this instruction.
+     * @param closure the closure to apply
+     */
+    public void inputValuesDo(ValueClosure closure) {
+        for (int i = 0; i < inputs().size(); i++) {
+            inputs().set(i, closure.apply((Value) inputs().get(i)));
+        }
+        for (int i = 0; i < successors().size(); i++) {
+            successors().set(i, closure.apply((Value) successors().get(i)));
+        }
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+        builder.append("#");
+        builder.append(id());
+        builder.append(' ');
+        if (id() < 10) {
+            builder.append(' ');
+        }
+        builder.append(getClass().getSimpleName());
+        builder.append(" [").append(flagsToString()).append("]");
+        return builder.toString();
+    }
+
+    public String flagsToString() {
+        StringBuilder sb = new StringBuilder();
+        return sb.toString();
+    }
+
+    /**
+     * Compute the value number of this Instruction. Local and global value numbering
+     * optimizations use a hash map, and the value number provides a hash code.
+     * If the instruction cannot be value numbered, then this method should return
+     * {@code 0}.
+     * @return the hashcode of this instruction
+     */
+    public int valueNumber() {
+        return 0;
+    }
+
+    /**
+     * Checks that this instruction is equal to another instruction for the purposes
+     * of value numbering.
+     * @param i the other instruction
+     * @return {@code true} if this instruction is equivalent to the specified
+     * instruction w.r.t. value numbering
+     */
+    public boolean valueEqual(Node i) {
+        return false;
+    }
+
+    /**
+     * This method supports the visitor pattern by accepting a visitor and calling the
+     * appropriate {@code visit()} method.
+     *
+     * @param v the visitor to accept
+     */
+    public abstract void accept(ValueVisitor v);
+
+    public abstract void print(LogStream out);
+
+    @Override
+    public Map<Object, Object> getDebugProperties() {
+        Map<Object, Object> properties = super.getDebugProperties();
+        properties.put("kind", kind.toString());
+        properties.put("operand", operand == null ? "null" : operand.toString());
+        return properties;
+    }
+
+
+}