1/* 2 * Copyright (c) 2011, 2013, 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 6905845 27 * @summary Server VM improperly optimizing away loop. 28 * 29 * @run main/timeout=480 compiler.c2.Test6905845 30 */ 31 32package compiler.c2; 33 34public class Test6905845 { 35 36 public static void main(String[] args) { 37 for (int asdf = 0; asdf < 5; asdf++) { 38 //test block 39 { 40 StringBuilder strBuf1 = new StringBuilder(65); 41 long start = System.currentTimeMillis(); 42 int count = 0; 43 44 for (int i = Integer.MIN_VALUE; i < (Integer.MAX_VALUE - 80); i += 79) { 45 strBuf1.append(i); 46 count++; 47 strBuf1.delete(0, 65); 48 } 49 50 System.out.println(count); 51 if (count != 54366674) { 52 System.out.println("wrong count: " + count + ", should be 54366674"); 53 System.exit(97); 54 } 55 } 56 //test block 57 { 58 StringBuilder strBuf1 = new StringBuilder(65); 59 long start = System.currentTimeMillis(); 60 int count = 0; 61 62 for (int i = Integer.MIN_VALUE; i < (Integer.MAX_VALUE - 80); i += 79) { 63 strBuf1.append(i); 64 count++; 65 strBuf1.delete(0, 65); 66 } 67 68 System.out.println(count); 69 if (count != 54366674) { 70 System.out.println("wrong count: " + count + ", should be 54366674"); 71 System.exit(97); 72 } 73 } 74 } 75 } 76} 77 78