diff -r d3cc20285653 -r 6bc9abf210fd test/compiler/unsafe/TestRawAliasing.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/unsafe/TestRawAliasing.java	Tue Jul 25 10:10:41 2017 -0400
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2017, 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.
+ */
+
+/*
+ * @test
+ * @bug 8178047
+ * @run main/othervm -XX:CompileCommand=exclude,*.main -XX:-TieredCompilation -XX:-BackgroundCompilation compiler.unsafe.TestRawAliasing
+ */
+
+package compiler.unsafe;
+
+import java.lang.reflect.Field;
+
+public class TestRawAliasing {
+    static private final sun.misc.Unsafe UNSAFE;
+    static {
+        try {
+            Field f = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");
+            f.setAccessible(true);
+            UNSAFE = (sun.misc.Unsafe) f.get(null);
+        } catch (Exception e) {
+            throw new RuntimeException("Unable to get Unsafe instance.", e);
+        }
+    }
+
+    static private final int OFFSET_X = 50;
+    static private final int OFFSET_Y = 100;
+
+    private static int test(long base_plus_offset_x, long base_plus_offset_y, int magic_value) {
+        // write 0 to a location
+        UNSAFE.putByte(base_plus_offset_x - OFFSET_X, (byte)0);
+        // write unfoldable value to really the same location with another base
+        UNSAFE.putByte(base_plus_offset_y - OFFSET_Y, (byte)magic_value);
+        // read the value back, should be equal to "unfoldable_value"
+        return UNSAFE.getByte(base_plus_offset_x - OFFSET_X);
+    }
+
+    private static final int OFF_HEAP_AREA_SIZE = 128;
+    private static final byte MAGIC = 123;
+
+    // main is excluded from compilation since we don't want the test method to inline and make base values fold
+    public static void main(String... args) {
+        long base = UNSAFE.allocateMemory(OFF_HEAP_AREA_SIZE);
+        for (int i = 0; i < 100_000; i++) {
+            if (test(base + OFFSET_X, base + OFFSET_Y, MAGIC) != MAGIC) {
+                throw new RuntimeException("Unexpected magic value");
+            }
+        }
+    }
+}