Mercurial > hg > graal-jvmci-8
comparison test/compiler/8005033/Test8005033.java @ 7426:65c8342f726a
8005033: clear high word for integer pop count on SPARC
Reviewed-by: kvn, twisti
Contributed-by: Richard Reingruber <richard.reingruber@sap.com>
author | twisti |
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date | Wed, 19 Dec 2012 14:44:00 -0800 |
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7425:1e41b0bc58a0 | 7426:65c8342f726a |
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1 /* | |
2 * Copyright 2012 SAP AG. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 */ | |
23 | |
24 /** | |
25 * @test | |
26 * @bug 8005033 | |
27 * @summary On sparcv9, C2's intrinsic for Integer.bitCount(OV) returns wrong result if OV is the result of an operation with int overflow. | |
28 * @run main/othervm -Xcomp -XX:CompileOnly=Test8005033::testBitCount Test8005033 | |
29 * @author Richard Reingruber richard DOT reingruber AT sap DOT com | |
30 */ | |
31 | |
32 public class Test8005033 { | |
33 public static int MINUS_ONE = -1; | |
34 | |
35 public static void main(String[] args) { | |
36 System.out.println("EXECUTING test."); | |
37 Integer.bitCount(1); // load class | |
38 int expectedBitCount = 0; | |
39 int calculatedBitCount = testBitCount(); | |
40 if (expectedBitCount != calculatedBitCount) { | |
41 throw new InternalError("got " + calculatedBitCount + " but expected " + expectedBitCount); | |
42 } | |
43 System.out.println("SUCCESSFULLY passed test."); | |
44 } | |
45 | |
46 // testBitCount will be compiled using the Integer.bitCount() intrinsic if possible | |
47 private static int testBitCount() { | |
48 return Integer.bitCount(MINUS_ONE+1); // -1 + 1 => int overflow | |
49 } | |
50 } |