--- /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/phases/LIRSuites.java	2016-12-09 00:54:28.971521938 -0800
@@ -0,0 +1,104 @@
+/*
+ * 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.phases;
+
+import org.graalvm.compiler.lir.LIR;
+import org.graalvm.compiler.lir.Variable;
+import org.graalvm.compiler.lir.VirtualStackSlot;
+import org.graalvm.compiler.lir.gen.LIRGenerationResult;
+import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
+import org.graalvm.compiler.lir.phases.AllocationPhase.AllocationContext;
+import org.graalvm.compiler.lir.phases.PostAllocationOptimizationPhase.PostAllocationOptimizationContext;
+import org.graalvm.compiler.lir.phases.PreAllocationOptimizationPhase.PreAllocationOptimizationContext;
+
+import jdk.vm.ci.code.StackSlot;
+
+public class LIRSuites {
+
+    private final LIRPhaseSuite<PreAllocationOptimizationContext> preAllocOptStage;
+    private final LIRPhaseSuite<AllocationContext> allocStage;
+    private final LIRPhaseSuite<PostAllocationOptimizationContext> postAllocStage;
+    private boolean immutable;
+
+    public LIRSuites(LIRPhaseSuite<PreAllocationOptimizationContext> preAllocOptStage, LIRPhaseSuite<AllocationContext> allocStage, LIRPhaseSuite<PostAllocationOptimizationContext> postAllocStage) {
+        this.preAllocOptStage = preAllocOptStage;
+        this.allocStage = allocStage;
+        this.postAllocStage = postAllocStage;
+    }
+
+    public LIRSuites(LIRSuites other) {
+        this(other.getPreAllocationOptimizationStage().copy(), other.getAllocationStage().copy(), other.getPostAllocationOptimizationStage().copy());
+    }
+
+    /**
+     * {@link PreAllocationOptimizationPhase}s are executed between {@link LIR} generation and
+     * register allocation.
+     * <p>
+     * {@link PreAllocationOptimizationPhase Implementers} can create new
+     * {@link LIRGeneratorTool#newVariable variables}, {@link LIRGenerationResult#getFrameMap stack
+     * slots} and {@link LIRGenerationResult#getFrameMapBuilder virtual stack slots}.
+     */
+    public LIRPhaseSuite<PreAllocationOptimizationContext> getPreAllocationOptimizationStage() {
+        return preAllocOptStage;
+    }
+
+    /**
+     * {@link AllocationPhase}s are responsible for register allocation and translating
+     * {@link VirtualStackSlot}s into {@link StackSlot}s.
+     * <p>
+     * After the {@link AllocationStage} there should be no more {@link Variable}s and
+     * {@link VirtualStackSlot}s.
+     */
+    public LIRPhaseSuite<AllocationContext> getAllocationStage() {
+        return allocStage;
+    }
+
+    /**
+     * {@link PostAllocationOptimizationPhase}s are executed after register allocation and before
+     * machine code generation.
+     * <p>
+     * A {@link PostAllocationOptimizationPhase} must not introduce new {@link Variable}s,
+     * {@link VirtualStackSlot}s or {@link StackSlot}s. Blocks might be removed from
+     * {@link LIR#codeEmittingOrder()} by overwriting them with {@code null}.
+     */
+    public LIRPhaseSuite<PostAllocationOptimizationContext> getPostAllocationOptimizationStage() {
+        return postAllocStage;
+    }
+
+    public boolean isImmutable() {
+        return immutable;
+    }
+
+    public synchronized void setImmutable() {
+        if (!immutable) {
+            preAllocOptStage.setImmutable();
+            allocStage.setImmutable();
+            postAllocStage.setImmutable();
+            immutable = true;
+        }
+    }
+
+    public LIRSuites copy() {
+        return new LIRSuites(preAllocOptStage.copy(), allocStage.copy(), postAllocStage.copy());
+    }
+}