diff --git a/tools/vm-tests-tf/src/util/build/DexBuildStep.java b/tools/vm-tests-tf/src/util/build/DexBuildStep.java
new file mode 100644
index 0000000..6aba51c
--- /dev/null
+++ b/tools/vm-tests-tf/src/util/build/DexBuildStep.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package util.build;
+
+import com.android.dx.command.dexer.Main;
+import java.io.IOException;
+
+public class DexBuildStep extends BuildStep {
+
+    private final boolean deleteInputFileAfterBuild;
+
+    DexBuildStep(BuildFile inputFile, BuildFile outputFile,
+            boolean deleteInputFileAfterBuild) {
+        super(inputFile, outputFile);
+        this.deleteInputFileAfterBuild = deleteInputFileAfterBuild;
+    }
+
+    @Override
+    boolean build() {
+
+        if (super.build()) {
+            Main.Arguments args = new Main.Arguments();
+
+            args.jarOutput = true;
+            args.fileNames = new String[] {inputFile.fileName.getAbsolutePath()};
+
+            args.outName = outputFile.fileName.getAbsolutePath();
+
+            int result = 0;
+            try {
+                result = Main.run(args);
+            } catch (IOException e) {
+                e.printStackTrace();
+                return false;
+            }
+
+            if (result == 0) {
+                if (deleteInputFileAfterBuild) {
+                    inputFile.fileName.delete();
+                }
+                return true;
+            } else {
+                System.err.println("exception while dexing "
+                        + inputFile.fileName.getAbsolutePath() + " to "
+                        + args.outName);
+                return false;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return inputFile.hashCode() ^ outputFile.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (super.equals(obj)) {
+            DexBuildStep other = (DexBuildStep) obj;
+
+            return inputFile.equals(other.inputFile)
+                    && outputFile.equals(other.outputFile);
+        }
+        return false;
+    }
+
+
+}