--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/LockEliminationTest.java	Thu Feb 16 15:46:09 2017 -0800
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2011, 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.test;
+
+import jdk.vm.ci.meta.ResolvedJavaMethod;
+
+import org.junit.Test;
+
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
+import org.graalvm.compiler.nodes.java.MonitorExitNode;
+import org.graalvm.compiler.nodes.java.RawMonitorEnterNode;
+import org.graalvm.compiler.nodes.spi.LoweringTool;
+import org.graalvm.compiler.phases.common.CanonicalizerPhase;
+import org.graalvm.compiler.phases.common.DeadCodeEliminationPhase;
+import org.graalvm.compiler.phases.common.LockEliminationPhase;
+import org.graalvm.compiler.phases.common.LoweringPhase;
+import org.graalvm.compiler.phases.common.ValueAnchorCleanupPhase;
+import org.graalvm.compiler.phases.common.inlining.InliningPhase;
+import org.graalvm.compiler.phases.tiers.HighTierContext;
+import org.graalvm.compiler.phases.tiers.PhaseContext;
+
+public class LockEliminationTest extends GraalCompilerTest {
+
+    static class A {
+
+        int value;
+
+        public synchronized int getValue() {
+            return value;
+        }
+    }
+
+    static int field1;
+    static int field2;
+
+    public static void testSynchronizedSnippet(A x, A y) {
+        synchronized (x) {
+            field1 = x.value;
+        }
+        synchronized (x) {
+            field2 = y.value;
+        }
+    }
+
+    @Test
+    public void testLock() {
+        test("testSynchronizedSnippet", new A(), new A());
+
+        StructuredGraph graph = getGraph("testSynchronizedSnippet");
+        new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
+        new LockEliminationPhase().apply(graph);
+        assertDeepEquals(1, graph.getNodes().filter(RawMonitorEnterNode.class).count());
+        assertDeepEquals(1, graph.getNodes().filter(MonitorExitNode.class).count());
+    }
+
+    public static void testSynchronizedMethodSnippet(A x) {
+        int value1 = x.getValue();
+        int value2 = x.getValue();
+        field1 = value1;
+        field2 = value2;
+    }
+
+    @Test
+    public void testSynchronizedMethod() {
+        test("testSynchronizedMethodSnippet", new A());
+
+        StructuredGraph graph = getGraph("testSynchronizedMethodSnippet");
+        new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
+        new LockEliminationPhase().apply(graph);
+        assertDeepEquals(1, graph.getNodes().filter(RawMonitorEnterNode.class).count());
+        assertDeepEquals(1, graph.getNodes().filter(MonitorExitNode.class).count());
+    }
+
+    private StructuredGraph getGraph(String snippet) {
+        ResolvedJavaMethod method = getResolvedJavaMethod(snippet);
+        StructuredGraph graph = parseEager(method, AllowAssumptions.YES);
+        HighTierContext context = getDefaultHighTierContext();
+        new CanonicalizerPhase().apply(graph, context);
+        new InliningPhase(new CanonicalizerPhase()).apply(graph, context);
+        new CanonicalizerPhase().apply(graph, context);
+        new DeadCodeEliminationPhase().apply(graph);
+        new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
+        new ValueAnchorCleanupPhase().apply(graph);
+        new LockEliminationPhase().apply(graph);
+        return graph;
+    }
+
+}