--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/BailoutAndRestartBackendException.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,53 @@
+/*
+ * 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 org.graalvm.compiler.lir;
+
+import org.graalvm.compiler.core.common.PermanentBailoutException;
+import org.graalvm.compiler.options.Option;
+import org.graalvm.compiler.options.OptionKey;
+import org.graalvm.compiler.options.OptionType;
+
+/**
+ * Restarts the {@link LIR low-level} compilation with a modified configuration.
+ * {@link BailoutAndRestartBackendException.Options#LIRUnlockBackendRestart LIRUnlockBackendRestart}
+ * needs to be enabled. Use only for debugging purposes only.
+ */
+public abstract class BailoutAndRestartBackendException extends PermanentBailoutException {
+
+    public static class Options {
+        // @formatter:off
+        @Option(help = "Unlock backend restart feature.", type = OptionType.Debug)
+        public static final OptionKey<Boolean> LIRUnlockBackendRestart = new OptionKey<>(false);
+        // @formatter:on
+    }
+
+    private static final long serialVersionUID = 792969002851591180L;
+
+    public BailoutAndRestartBackendException(String msg) {
+        super(msg);
+    }
+
+    public BailoutAndRestartBackendException(Throwable cause, String msg) {
+        super(cause, msg);
+    }
+}