--- a/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LinearScanWalker.java	Mon Apr 13 16:50:27 2015 +0200
+++ b/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/LinearScanWalker.java	Mon Apr 13 11:50:27 2015 +0200
@@ -713,10 +713,11 @@
                 Debug.log("able to spill current interval. firstUsage(register): %d, usePos: %d", firstUsage, regUsePos);
 
                 if (firstUsage <= interval.from() + 1) {
-                    assert false : "cannot spill interval that is used in first instruction (possible reason: no register found) firstUsage=" + firstUsage + ", interval.from()=" + interval.from();
+                    String description = "cannot spill interval that is used in first instruction (possible reason: no register found) firstUsage=" + firstUsage + ", interval.from()=" +
+                                    interval.from();
                     // assign a reasonable register and do a bailout in product mode to avoid errors
                     allocator.assignSpillSlot(interval);
-                    throw new BailoutException("LinearScan: no register found");
+                    throw new OutOfRegistersException("LinearScan: no register found", description);
                 }
 
                 splitAndSpillInterval(interval);

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/alloc/lsra/OutOfRegistersException.java	Mon Apr 13 11:50:27 2015 +0200
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2015, 2015, 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.graal.lir.alloc.lsra;
+
+import com.oracle.graal.api.code.*;
+
+public class OutOfRegistersException extends BailoutException {
+
+    private static final long serialVersionUID = -3479786650143432195L;
+
+    private final String description;
+
+    public OutOfRegistersException(String msg) {
+        super(msg);
+        this.description = "";
+    }
+
+    public OutOfRegistersException(Throwable cause, String msg) {
+        super(cause, msg);
+        this.description = "";
+    }
+
+    public OutOfRegistersException(boolean permanent, String msg) {
+        super(permanent, msg);
+        this.description = "";
+    }
+
+    public OutOfRegistersException(String msg, String description) {
+        super(msg);
+        this.description = description;
+    }
+
+    public OutOfRegistersException(Throwable cause, String msg, String description) {
+        super(cause, msg);
+        this.description = description;
+    }
+
+    public OutOfRegistersException(boolean permanent, String msg, String description) {
+        super(permanent, msg);
+        this.description = description;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}