--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/floatingpoint/TestPow2.java	Wed Jan 07 16:40:02 2015 +0100
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2014, 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 8063086
+ * @summary X^2 special case for C2 yields different result than interpreter
+ * @library /testlibrary /../../test/lib /compiler/whitebox
+ * @build TestPow2
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
+ *                   -XX:-BackgroundCompilation -XX:-UseOnStackReplacement TestPow2
+ *
+ */
+
+import java.lang.reflect.*;
+import sun.hotspot.WhiteBox;
+
+public class TestPow2 {
+
+    private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
+
+    private static final double base = 5350.456329377186;
+    private static final double exp = 2.0;
+
+    static double m() {
+        return Math.pow(base, exp);
+    }
+
+    static public void main(String[] args) throws NoSuchMethodException {
+        Method test_method = TestPow2.class.getDeclaredMethod("m");
+
+        double interpreter_result = m();
+
+        // Compile with C1 if possible
+        WHITE_BOX.enqueueMethodForCompilation(test_method, CompilerWhiteBoxTest.COMP_LEVEL_SIMPLE);
+
+        double c1_result = m();
+
+        WHITE_BOX.deoptimizeMethod(test_method);
+
+        // Compile it with C2 if possible
+        WHITE_BOX.enqueueMethodForCompilation(test_method, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
+
+        double c2_result = m();
+
+        if (interpreter_result != c1_result || interpreter_result != c2_result ||
+            c1_result != c2_result) {
+            System.out.println("interpreter = " + interpreter_result + " c1 = " + c1_result + " c2 = " + c2_result);
+            throw new RuntimeException("Test Failed");
+        }
+    }
+}