--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/UnsafeVirtualizationTest.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,94 @@
+/*
+ * 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.core.test;
+
+import java.lang.reflect.Field;
+
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
+import org.graalvm.compiler.options.OptionValues;
+import org.graalvm.compiler.phases.common.CanonicalizerPhase;
+import org.graalvm.compiler.phases.tiers.PhaseContext;
+import org.graalvm.compiler.virtual.phases.ea.PartialEscapePhase;
+import org.junit.Test;
+
+public class UnsafeVirtualizationTest extends GraalCompilerTest {
+
+    public static class A {
+        int f1;
+        int f2;
+    }
+
+    private static final long AF1Offset;
+    private static final long AF2Offset;
+    static {
+        long o1 = -1;
+        long o2 = -1;
+        try {
+            Field f1 = A.class.getDeclaredField("f1");
+            Field f2 = A.class.getDeclaredField("f2");
+            o1 = UNSAFE.objectFieldOffset(f1);
+            o2 = UNSAFE.objectFieldOffset(f2);
+        } catch (NoSuchFieldException | SecurityException e) {
+            throw new AssertionError(e);
+        }
+        AF1Offset = o1;
+        AF2Offset = o2;
+    }
+
+    public static int unsafeSnippet0(int i1, int i2) {
+        A a = new A();
+        UNSAFE.putDouble(a, AF1Offset, i1 + i2);
+        return UNSAFE.getInt(a, AF1Offset) + UNSAFE.getInt(a, AF2Offset);
+    }
+
+    public static int unsafeSnippet1(int i1, int i2) {
+        A a = new A();
+        UNSAFE.putDouble(a, AF1Offset, i1 + i2);
+        a.f2 = i1;
+        return (int) UNSAFE.getDouble(a, AF1Offset);
+    }
+
+    @Test
+    public void testUnsafePEA01() {
+        testPartialEscapeReadElimination(parseEager("unsafeSnippet0", AllowAssumptions.NO), false);
+        testPartialEscapeReadElimination(parseEager("unsafeSnippet0", AllowAssumptions.NO), true);
+    }
+
+    @Test
+    public void testUnsafePEA02() {
+        testPartialEscapeReadElimination(parseEager("unsafeSnippet1", AllowAssumptions.NO), false);
+        testPartialEscapeReadElimination(parseEager("unsafeSnippet1", AllowAssumptions.NO), true);
+    }
+
+    public void testPartialEscapeReadElimination(StructuredGraph graph, boolean canonicalizeBefore) {
+        OptionValues options = graph.getOptions();
+        PhaseContext context = getDefaultHighTierContext();
+        CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
+        if (canonicalizeBefore) {
+            canonicalizer.apply(graph, context);
+        }
+        new PartialEscapePhase(true, true, canonicalizer, null, options).apply(graph, context);
+    }
+
+}