--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiFrame.java	Tue Jan 03 16:29:28 2012 +0100
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2009, 2012, 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.cri.ci;
+
+import java.io.*;
+
+import com.oracle.max.cri.ri.*;
+
+/**
+ * Represents the Java bytecode frame state(s) at a given position
+ * including {@link CiValue locations} where to find the local variables,
+ * operand stack values and locked objects of the bytecode frame(s).
+ */
+public class CiFrame extends CiCodePos implements Serializable {
+    private static final long serialVersionUID = -345025397165977565L;
+
+    /**
+     * An array of values representing how to reconstruct the state of the Java frame.
+     * This is array is partitioned as follows:
+     * <p>
+     * <table border="1" cellpadding="5" frame="void", rules="all">
+     * <tr><th>Start index (inclusive)</th><th>End index (exclusive)</th><th>Description</th></tr>
+     * <tr><td>0</td>                   <td>numLocals</td>           <td>Local variables</td></tr>
+     * <tr><td>numLocals</td>           <td>numLocals + numStack</td><td>Operand stack</td></tr>
+     * <tr><td>numLocals + numStack</td><td>values.length</td>       <td>Locked objects</td></tr>
+     * </table>
+     * <p>
+     * Note that the number of locals and the number of stack slots may be smaller than the
+     * maximum number of locals and stack slots as specified in the compiled method.
+     */
+    public final CiValue[] values;
+
+    /**
+     * The number of locals in the values array.
+     */
+    public final int numLocals;
+
+    /**
+     * The number of stack slots in the values array.
+     */
+    public final int numStack;
+
+    /**
+     * The number of locks in the values array.
+     */
+    public final int numLocks;
+
+    public final boolean rethrowException;
+
+    /**
+     * Creates a new frame object.
+     *
+     * @param caller the caller frame (which may be {@code null})
+     * @param method the method
+     * @param bci a BCI within the method
+     * @param rethrowException specifies if the VM should re-throw the pending exception when deopt'ing using this frame
+     * @param values the frame state {@link #values}
+     * @param numLocals the number of local variables
+     * @param numStack the depth of the stack
+     * @param numLocks the number of locked objects
+     */
+    public CiFrame(CiFrame caller, RiResolvedMethod method, int bci, boolean rethrowException, CiValue[] values, int numLocals, int numStack, int numLocks) {
+        super(caller, method, bci);
+        assert values != null;
+        this.rethrowException = rethrowException;
+        this.values = values;
+        this.numLocks = numLocks;
+        this.numLocals = numLocals;
+        this.numStack = numStack;
+        assert !rethrowException || numStack == 1 : "must have exception on top of the stack";
+    }
+
+    /**
+     * Gets the value representing the specified local variable.
+     * @param i the local variable index
+     * @return the value that can be used to reconstruct the local's current value
+     */
+    public CiValue getLocalValue(int i) {
+        return values[i];
+    }
+
+    /**
+     * Gets the value representing the specified stack slot.
+     * @param i the stack index
+     * @return the value that can be used to reconstruct the stack slot's current value
+     */
+    public CiValue getStackValue(int i) {
+        return values[i + numLocals];
+    }
+
+    /**
+     * Gets the value representing the specified lock.
+     * @param i the lock index
+     * @return the value that can be used to reconstruct the lock's current value
+     */
+    public CiValue getLockValue(int i) {
+        return values[i + numLocals + numStack];
+    }
+
+    /**
+     * Gets the caller of this frame.
+     *
+     * @return {@code null} if this frame has no caller
+     */
+    public CiFrame caller() {
+        return (CiFrame) caller;
+    }
+
+    @Override
+    public String toString() {
+        return CiUtil.append(new StringBuilder(100), this).toString();
+    }
+}