--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/alloc/trace/lsra/TraceLinearScanRegisterAllocationPhase.java	2016-12-09 00:54:16.688980534 -0800
@@ -0,0 +1,54 @@
+/*
+ * 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 org.graalvm.compiler.lir.alloc.trace.lsra;
+
+import org.graalvm.compiler.core.common.alloc.Trace;
+import org.graalvm.compiler.debug.Debug;
+import org.graalvm.compiler.debug.Indent;
+import org.graalvm.compiler.lir.alloc.trace.lsra.TraceLinearScanPhase.TraceLinearScan;
+import org.graalvm.compiler.lir.gen.LIRGenerationResult;
+
+import jdk.vm.ci.code.TargetDescription;
+
+final class TraceLinearScanRegisterAllocationPhase extends TraceLinearScanAllocationPhase {
+
+    @Override
+    protected void run(TargetDescription target, LIRGenerationResult lirGenRes, Trace trace, TraceLinearScanAllocationContext context) {
+        TraceLinearScan allocator = context.allocator;
+        allocateRegisters(allocator);
+    }
+
+    @SuppressWarnings("try")
+    private static void allocateRegisters(TraceLinearScan allocator) {
+        try (Indent indent = Debug.logAndIndent("allocate registers")) {
+            FixedInterval precoloredIntervals = allocator.createFixedUnhandledList();
+            TraceInterval notPrecoloredIntervals = allocator.createUnhandledListByFrom(TraceLinearScanPhase.IS_VARIABLE_INTERVAL);
+
+            // allocate cpu registers
+            TraceLinearScanWalker lsw = new TraceLinearScanWalker(allocator, precoloredIntervals, notPrecoloredIntervals);
+            lsw.walk();
+            lsw.finishAllocation();
+        }
+    }
+
+}