--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/alloc/trace/TraceRegisterAllocationPolicy.java	2017-02-15 17:05:35.551918441 -0800
@@ -0,0 +1,113 @@
+/*
+ * 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.alloc.trace;
+
+import java.util.ArrayList;
+
+import org.graalvm.compiler.core.common.alloc.RegisterAllocationConfig;
+import org.graalvm.compiler.core.common.alloc.Trace;
+import org.graalvm.compiler.core.common.alloc.TraceBuilderResult;
+import org.graalvm.compiler.lir.LIR;
+import org.graalvm.compiler.lir.alloc.trace.TraceAllocationPhase.TraceAllocationContext;
+import org.graalvm.compiler.lir.gen.LIRGenerationResult;
+import org.graalvm.compiler.lir.gen.LIRGeneratorTool.MoveFactory;
+
+import jdk.vm.ci.code.TargetDescription;
+import jdk.vm.ci.common.JVMCIError;
+import jdk.vm.ci.meta.AllocatableValue;
+
+/**
+ * Manages the selection of allocation strategies.
+ */
+public final class TraceRegisterAllocationPolicy {
+
+    protected abstract class AllocationStrategy {
+        TraceAllocationPhase<TraceAllocationContext> allocator;
+
+        public final TraceAllocationPhase<TraceAllocationContext> getAllocator() {
+            if (allocator == null) {
+                allocator = initAllocator(target, lirGenRes, spillMoveFactory, registerAllocationConfig, cachedStackSlots, resultTraces, neverSpillConstants, strategies);
+            }
+            return allocator;
+        }
+
+        protected final LIR getLIR() {
+            return lirGenRes.getLIR();
+        }
+
+        protected final LIRGenerationResult getLIRGenerationResult() {
+            return lirGenRes;
+        }
+
+        protected final TraceBuilderResult getTraceBuilderResult() {
+            return resultTraces;
+        }
+
+        /**
+         * Returns {@code true} if the allocation strategy should be used for {@code trace}.
+         */
+        public abstract boolean shouldApplyTo(Trace trace);
+
+        @SuppressWarnings("hiding")
+        protected abstract TraceAllocationPhase<TraceAllocationContext> initAllocator(TargetDescription target, LIRGenerationResult lirGenRes, MoveFactory spillMoveFactory,
+                        RegisterAllocationConfig registerAllocationConfig, AllocatableValue[] cachedStackSlots, TraceBuilderResult resultTraces, boolean neverSpillConstant,
+                        ArrayList<AllocationStrategy> strategies);
+    }
+
+    private final TargetDescription target;
+    private final LIRGenerationResult lirGenRes;
+    private final MoveFactory spillMoveFactory;
+    private final RegisterAllocationConfig registerAllocationConfig;
+    private final AllocatableValue[] cachedStackSlots;
+    private final TraceBuilderResult resultTraces;
+    private final boolean neverSpillConstants;
+
+    private final ArrayList<AllocationStrategy> strategies;
+
+    public TraceRegisterAllocationPolicy(TargetDescription target, LIRGenerationResult lirGenRes, MoveFactory spillMoveFactory, RegisterAllocationConfig registerAllocationConfig,
+                    AllocatableValue[] cachedStackSlots, TraceBuilderResult resultTraces, boolean neverSpillConstant) {
+        this.target = target;
+        this.lirGenRes = lirGenRes;
+        this.spillMoveFactory = spillMoveFactory;
+        this.registerAllocationConfig = registerAllocationConfig;
+        this.cachedStackSlots = cachedStackSlots;
+        this.resultTraces = resultTraces;
+        this.neverSpillConstants = neverSpillConstant;
+
+        this.strategies = new ArrayList<>(3);
+    }
+
+    public void appendStrategy(AllocationStrategy strategy) {
+        strategies.add(strategy);
+    }
+
+    public TraceAllocationPhase<TraceAllocationContext> selectStrategy(Trace trace) {
+        for (AllocationStrategy strategy : strategies) {
+            if (strategy.shouldApplyTo(trace)) {
+                return strategy.getAllocator();
+            }
+        }
+        throw JVMCIError.shouldNotReachHere("No Allocation Strategy found!");
+    }
+
+}