1 /* 2 * Copyright (c) 2011, 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 /** 26 * @test 27 * @bug 6559156 28 * @summary Server compiler generates bad code for "<= Integer.MAX_VALUE" expression 29 * 30 * @run main Test6559156 31 */ 32 33 public class Test6559156 { 34 35 static final int N_TESTS = 1000000; 36 37 public static void main(String[] args) throws Exception { 38 39 /* 40 * If MAX_VALUE is changed to MAX_VALUE - 1 below, the test passes 41 * because (apparently) bad code is only generated when comparing 42 * <= MAX_VALUE in the doTest method. 43 */ 44 Test6559156 test = new Test6559156(); 45 for (int i = 0; i < N_TESTS; i += 1) { 46 test.doTest1(10, Integer.MAX_VALUE, i); 47 test.doTest2(10, Integer.MAX_VALUE, i); 48 } 49 System.out.println("No failure"); 50 } 51 52 void doTest1(int expected, int max, int i) { 53 int counted; 54 for (counted = 0; 55 (counted <= max) && (counted < expected); 56 counted += 1) { 57 } 58 if (counted != expected) { 59 throw new RuntimeException("Failed test1 iteration=" + i + 60 " max=" + max + 61 " counted=" + counted + 62 " expected=" + expected); 63 } 64 } 65 66 void doTest2(int expected, int max, int i) { 67 int counted; 68 for (counted = 0; 69 // change test sequence. 70 (counted < expected) && (counted <= max); 71 counted += 1) { 72 } 73 if (counted != expected) { 74 throw new RuntimeException("Failed test1 iteration=" + i + 75 " max=" + max + 76 " counted=" + counted + 77 " expected=" + expected); 78 } 79 } 80 } 81