--- /dev/null	2016-05-10 17:52:27.219330981 +0300
+++ new/test/testlibrary/jittester/src/jdk/test/lib/jittester/JavaCodeGenerator.java	2016-05-12 04:25:00.006334327 +0300
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2016, 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 jdk.test.lib.jittester;
+
+import jdk.test.lib.jittester.visitors.JavaCodeVisitor;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.function.BiFunction;
+
+/**
+ * Generates class files from java source code
+ */
+class JavaCodeGenerator implements BiFunction<IRNode, IRNode, String> {
+    private final Path testbase = Paths.get(ProductionParams.testbaseDir.value(), "java_tests");
+
+    private String generateJavaCode(IRNode mainClass, IRNode privateClasses) {
+        StringBuilder code = new StringBuilder();
+        JavaCodeVisitor vis = new JavaCodeVisitor();
+
+        code.append(Automatic.getJtregHeader(mainClass.getName(), true));
+        if (privateClasses != null) {
+            code.append(privateClasses.accept(vis));
+        }
+        code.append(mainClass.accept(vis));
+
+        return code.toString();
+    }
+
+    public Path getTestbase() {
+        return testbase;
+    }
+
+    @Override
+    public String apply(IRNode mainClass, IRNode privateClasses) {
+        String code = generateJavaCode(mainClass, privateClasses);
+        Automatic.ensureExisting(testbase);
+        Path fileName = testbase.resolve(mainClass.getName() + ".java");
+        try (FileWriter file = new FileWriter(fileName.toFile())) {
+            file.write(code);
+            return fileName.toString();
+        } catch (IOException ex) {
+            ex.printStackTrace();
+        }
+        return "";
+    }
+}