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comparison test/compiler/codegen/LoadWithMask2.java @ 17506:984401824c5e

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8031743: C2: loadI2L_immI broken for negative memory values Summary: Restrict loadI2L_imm optimizations to positive values of mask Reviewed-by: kvn, dlong
author iveresov
date Tue, 21 Jan 2014 20:05:28 -0800
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17505:f970454708b8 17506:984401824c5e
1 /*
2 * Copyright (c) 2014, Oracle and/or its affiliates. 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 8031743
27 * @summary loadI2L_immI broken for negative memory values
28 * @run main/othervm -server -Xbatch -XX:-TieredCompilation -XX:CompileCommand=compileonly,*.foo* LoadWithMask2
29 *
30 */
31 public class LoadWithMask2 {
32 static int x;
33 static long foo1() {
34 return x & 0xfffffffe;
35 }
36 static long foo2() {
37 return x & 0xff000000;
38 }
39 static long foo3() {
40 return x & 0x8abcdef1;
41 }
42
43 public static void main(String[] args) {
44 x = -1;
45 long l = 0;
46 for (int i = 0; i < 100000; ++i) {
47 l = foo1() & foo2() & foo3();
48 }
49 if (l > 0) {
50 System.out.println("FAILED");
51 System.exit(97);
52 }
53 System.out.println("PASSED");
54 }
55 }