1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/test/compiler/7044738/Test7044738.java Wed Apr 27 01:25:04 2016 +0800 1.3 @@ -0,0 +1,104 @@ 1.4 +/* 1.5 + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. 1.11 + * 1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.15 + * version 2 for more details (a copy is included in the LICENSE file that 1.16 + * accompanied this code). 1.17 + * 1.18 + * You should have received a copy of the GNU General Public License version 1.19 + * 2 along with this work; if not, write to the Free Software Foundation, 1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.21 + * 1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.23 + * or visit www.oracle.com if you need additional information or have any 1.24 + * questions. 1.25 + * 1.26 + */ 1.27 + 1.28 +/** 1.29 + * @test 1.30 + * @bug 7044738 1.31 + * @summary Loop unroll optimization causes incorrect result 1.32 + * 1.33 + * @run main/othervm -Xbatch Test7044738 1.34 + */ 1.35 + 1.36 +public class Test7044738 { 1.37 + 1.38 + private static final int INITSIZE = 10000; 1.39 + public int d[] = { 1, 2, 3, 4 }; 1.40 + public int i, size; 1.41 + 1.42 + private static int iter = 5; 1.43 + 1.44 + boolean done() { return (--iter > 0); } 1.45 + 1.46 + public static void main(String args[]) { 1.47 + Test7044738 t = new Test7044738(); 1.48 + t.test(); 1.49 + } 1.50 + 1.51 + int test() { 1.52 + 1.53 + while (done()) { 1.54 + size = INITSIZE; 1.55 + 1.56 + for (i = 0; i < size; i++) { 1.57 + d[0] = d[1]; // 2 1.58 + d[1] = d[2]; // 3 1.59 + d[2] = d[3]; // 4 1.60 + d[3] = d[0]; // 2 1.61 + 1.62 + d[0] = d[1]; // 3 1.63 + d[1] = d[2]; // 4 1.64 + d[2] = d[3]; // 2 1.65 + d[3] = d[0]; // 3 1.66 + 1.67 + d[0] = d[1]; // 4 1.68 + d[1] = d[2]; // 2 1.69 + d[2] = d[3]; // 3 1.70 + d[3] = d[0]; // 4 1.71 + 1.72 + d[0] = d[1]; // 2 1.73 + d[1] = d[2]; // 3 1.74 + d[2] = d[3]; // 4 1.75 + d[3] = d[0]; // 2 1.76 + 1.77 + d[0] = d[1]; // 3 1.78 + d[1] = d[2]; // 4 1.79 + d[2] = d[3]; // 2 1.80 + d[3] = d[0]; // 3 1.81 + 1.82 + d[0] = d[1]; // 4 1.83 + d[1] = d[2]; // 2 1.84 + d[2] = d[3]; // 3 1.85 + d[3] = d[0]; // 4 1.86 + 1.87 + d[0] = d[1]; // 2 1.88 + d[1] = d[2]; // 3 1.89 + d[2] = d[3]; // 4 1.90 + d[3] = d[0]; // 2 1.91 + 1.92 + d[0] = d[1]; // 3 1.93 + d[1] = d[2]; // 4 1.94 + d[2] = d[3]; // 2 1.95 + d[3] = d[0]; // 3 1.96 + } 1.97 + 1.98 + // try to defeat dead code elimination 1.99 + if (d[0] == d[1]) { 1.100 + System.out.println("test failed: iter=" + iter + " i=" + i + " d[] = { " + d[0] + ", " + d[1] + ", " + d[2] + ", " + d[3] + " } "); 1.101 + System.exit(97); 1.102 + } 1.103 + } 1.104 + return d[3]; 1.105 + } 1.106 + 1.107 +}