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diff --git a/src/proguard/classfile/editor/VariableRemapper.java b/src/proguard/classfile/editor/VariableRemapper.java
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+++ b/src/proguard/classfile/editor/VariableRemapper.java
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+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program 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 for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package proguard.classfile.editor;
+
+import proguard.classfile.*;
+import proguard.classfile.attribute.*;
+import proguard.classfile.attribute.visitor.*;
+import proguard.classfile.instruction.*;
+import proguard.classfile.instruction.visitor.InstructionVisitor;
+import proguard.classfile.util.SimplifiedVisitor;
+
+/**
+ * This AttributeVisitor remaps variable indexes in all attributes that it
+ * visits, based on a given index map.
+ *
+ * @author Eric Lafortune
+ */
+public class VariableRemapper
+extends      SimplifiedVisitor
+implements   AttributeVisitor,
+             InstructionVisitor,
+             LocalVariableInfoVisitor,
+             LocalVariableTypeInfoVisitor
+{
+    private final CodeAttributeEditor codeAttributeEditor = new CodeAttributeEditor();
+
+    private int[] variableMap;
+
+
+    /**
+     * Sets the given mapping of old variable indexes to their new indexes.
+     * Variables that should disappear can be mapped to -1.
+     */
+    public void setVariableMap(int[] variableMap)
+    {
+        this.variableMap = variableMap;
+    }
+
+
+    // Implementations for AttributeVisitor.
+
+    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
+
+
+    public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
+    {
+        // Initially, the code attribute editor doesn't contain any changes.
+        codeAttributeEditor.reset(codeAttribute.u4codeLength);
+
+        // Remap the variables of the instructions.
+        codeAttribute.instructionsAccept(clazz, method, this);
+
+        // Apply the code atribute editor.
+        codeAttributeEditor.visitCodeAttribute(clazz, method, codeAttribute);
+
+        // Remap the variables of the attributes.
+        codeAttribute.attributesAccept(clazz, method, this);
+    }
+
+
+    public void visitLocalVariableTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTableAttribute localVariableTableAttribute)
+    {
+        // Remap the variable references of the local variables.
+        localVariableTableAttribute.localVariablesAccept(clazz, method, codeAttribute, this);
+
+        // Remove local variables that haven't been mapped.
+        localVariableTableAttribute.u2localVariableTableLength =
+            removeEmptyLocalVariables(localVariableTableAttribute.localVariableTable,
+                                      localVariableTableAttribute.u2localVariableTableLength);
+    }
+
+
+    public void visitLocalVariableTypeTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeTableAttribute localVariableTypeTableAttribute)
+    {
+        // Remap the variable references of the local variables.
+        localVariableTypeTableAttribute.localVariablesAccept(clazz, method, codeAttribute, this);
+
+        // Remove local variables that haven't been mapped.
+        localVariableTypeTableAttribute.u2localVariableTypeTableLength =
+            removeEmptyLocalVariableTypes(localVariableTypeTableAttribute.localVariableTypeTable,
+                                          localVariableTypeTableAttribute.u2localVariableTypeTableLength);
+    }
+
+
+    // Implementations for LocalVariableInfoVisitor.
+
+    public void visitLocalVariableInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableInfo localVariableInfo)
+    {
+        localVariableInfo.u2index =
+            remapVariable(localVariableInfo.u2index);
+    }
+
+
+    // Implementations for LocalVariableTypeInfoVisitor.
+
+    public void visitLocalVariableTypeInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeInfo localVariableTypeInfo)
+    {
+        localVariableTypeInfo.u2index =
+            remapVariable(localVariableTypeInfo.u2index);
+    }
+
+
+    // Implementations for InstructionVisitor.
+
+    public void visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction) {}
+
+
+    public void visitVariableInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, VariableInstruction variableInstruction)
+    {
+        // Is the new variable index different from the original one?
+        int oldVariableIndex = variableInstruction.variableIndex;
+        int newVariableIndex = remapVariable(oldVariableIndex);
+        if (newVariableIndex != oldVariableIndex)
+        {
+            // Replace the instruction.
+            Instruction replacementInstruction =
+                new VariableInstruction(variableInstruction.opcode,
+                                        newVariableIndex,
+                                        variableInstruction.constant).shrink();
+
+            codeAttributeEditor.replaceInstruction(offset, replacementInstruction);
+        }
+    }
+
+
+    // Small utility methods.
+
+    /**
+     * Returns the new variable index of the given variable.
+     */
+    private int remapVariable(int variableIndex)
+    {
+        return variableMap[variableIndex];
+    }
+
+
+    /**
+     * Returns the given list of local variables, without the ones that have
+     * been removed.
+     */
+    private int removeEmptyLocalVariables(LocalVariableInfo[] localVariableInfos,
+                                          int                 localVariableInfoCount)
+    {
+        // Overwrite all empty local variable entries.
+        int newIndex = 0;
+        for (int index = 0; index < localVariableInfoCount; index++)
+        {
+            LocalVariableInfo localVariableInfo = localVariableInfos[index];
+            if (localVariableInfo.u2index >= 0)
+            {
+                localVariableInfos[newIndex++] = localVariableInfo;
+            }
+        }
+
+        return newIndex;
+    }
+
+
+    /**
+     * Returns the given list of local variable types, without the ones that
+     * have been removed.
+     */
+    private int removeEmptyLocalVariableTypes(LocalVariableTypeInfo[] localVariableTypeInfos,
+                                              int                     localVariableTypeInfoCount)
+    {
+        // Overwrite all empty local variable type entries.
+        int newIndex = 0;
+        for (int index = 0; index < localVariableTypeInfoCount; index++)
+        {
+            LocalVariableTypeInfo localVariableTypeInfo = localVariableTypeInfos[index];
+            if (localVariableTypeInfo.u2index >= 0)
+            {
+                localVariableTypeInfos[newIndex++] = localVariableTypeInfo;
+            }
+        }
+
+        return newIndex;
+    }
+}