--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core/src/org/graalvm/compiler/core/phases/MidTier.java	Thu Feb 16 15:46:09 2017 -0800
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2013, 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.core.phases;
+
+import static org.graalvm.compiler.core.common.GraalOptions.ConditionalElimination;
+import static org.graalvm.compiler.core.common.GraalOptions.ImmutableCode;
+import static org.graalvm.compiler.core.common.GraalOptions.OptDeoptimizationGrouping;
+import static org.graalvm.compiler.core.common.GraalOptions.OptEliminatePartiallyRedundantGuards;
+import static org.graalvm.compiler.core.common.GraalOptions.OptFloatingReads;
+import static org.graalvm.compiler.core.common.GraalOptions.OptPushThroughPi;
+import static org.graalvm.compiler.core.common.GraalOptions.OptReadElimination;
+import static org.graalvm.compiler.core.common.GraalOptions.ReassociateInvariants;
+import static org.graalvm.compiler.core.common.GraalOptions.UseGraalInstrumentation;
+import static org.graalvm.compiler.core.common.GraalOptions.VerifyHeapAtReturn;
+
+import org.graalvm.compiler.loop.phases.LoopSafepointEliminationPhase;
+import org.graalvm.compiler.loop.phases.ReassociateInvariantPhase;
+import org.graalvm.compiler.nodes.spi.LoweringTool;
+import org.graalvm.compiler.phases.PhaseSuite;
+import org.graalvm.compiler.phases.common.CanonicalizerPhase;
+import org.graalvm.compiler.phases.common.DeoptimizationGroupingPhase;
+import org.graalvm.compiler.phases.common.FloatingReadPhase;
+import org.graalvm.compiler.phases.common.FrameStateAssignmentPhase;
+import org.graalvm.compiler.phases.common.GuardLoweringPhase;
+import org.graalvm.compiler.phases.common.IncrementalCanonicalizerPhase;
+import org.graalvm.compiler.phases.common.IterativeConditionalEliminationPhase;
+import org.graalvm.compiler.phases.common.LockEliminationPhase;
+import org.graalvm.compiler.phases.common.LoopSafepointInsertionPhase;
+import org.graalvm.compiler.phases.common.LoweringPhase;
+import org.graalvm.compiler.phases.common.OptimizeGuardAnchorsPhase;
+import org.graalvm.compiler.phases.common.PushThroughPiPhase;
+import org.graalvm.compiler.phases.common.RemoveValueProxyPhase;
+import org.graalvm.compiler.phases.common.ValueAnchorCleanupPhase;
+import org.graalvm.compiler.phases.common.VerifyHeapAtReturnPhase;
+import org.graalvm.compiler.phases.common.instrumentation.MidTierReconcileInstrumentationPhase;
+import org.graalvm.compiler.phases.tiers.MidTierContext;
+import org.graalvm.compiler.virtual.phases.ea.EarlyReadEliminationPhase;
+
+public class MidTier extends PhaseSuite<MidTierContext> {
+
+    public MidTier() {
+        CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
+        if (ImmutableCode.getValue()) {
+            canonicalizer.disableReadCanonicalization();
+        }
+
+        if (OptPushThroughPi.getValue()) {
+            appendPhase(new PushThroughPiPhase());
+        }
+
+        appendPhase(canonicalizer);
+
+        appendPhase(new ValueAnchorCleanupPhase());
+        appendPhase(new LockEliminationPhase());
+
+        if (OptReadElimination.getValue()) {
+            appendPhase(new EarlyReadEliminationPhase(canonicalizer));
+        }
+
+        if (OptFloatingReads.getValue()) {
+            appendPhase(new IncrementalCanonicalizerPhase<>(canonicalizer, new FloatingReadPhase()));
+        }
+        appendPhase(new RemoveValueProxyPhase());
+
+        appendPhase(canonicalizer);
+
+        if (OptEliminatePartiallyRedundantGuards.getValue()) {
+            appendPhase(new OptimizeGuardAnchorsPhase());
+        }
+
+        if (ConditionalElimination.getValue()) {
+            appendPhase(new IterativeConditionalEliminationPhase(canonicalizer, true));
+        }
+
+        if (OptEliminatePartiallyRedundantGuards.getValue()) {
+            appendPhase(new OptimizeGuardAnchorsPhase());
+        }
+
+        appendPhase(canonicalizer);
+
+        appendPhase(new IncrementalCanonicalizerPhase<>(canonicalizer, new LoopSafepointEliminationPhase()));
+
+        appendPhase(new LoopSafepointInsertionPhase());
+
+        appendPhase(new IncrementalCanonicalizerPhase<>(canonicalizer, new GuardLoweringPhase()));
+
+        if (VerifyHeapAtReturn.getValue()) {
+            appendPhase(new VerifyHeapAtReturnPhase());
+        }
+
+        appendPhase(new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.MID_TIER));
+        if (UseGraalInstrumentation.getValue()) {
+            appendPhase(new MidTierReconcileInstrumentationPhase());
+        }
+
+        appendPhase(new FrameStateAssignmentPhase());
+
+        if (ReassociateInvariants.getValue()) {
+            appendPhase(new ReassociateInvariantPhase());
+        }
+
+        if (OptDeoptimizationGrouping.getValue()) {
+            appendPhase(new DeoptimizationGroupingPhase());
+        }
+
+        appendPhase(canonicalizer);
+    }
+}