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 /**
  26  * @test
  27  * @bug 6992759
  28  * @summary Bad code generated for integer <= comparison, fails for Integer.MAX_VALUE
  29  *
  30  * @run main/timeout=240 compiler.c2.Test6992759
  31  */
  32 
  33 package compiler.c2;
  34 
  35 public class Test6992759 {
  36 
  37     static final int N_TESTS = 1000000000;
  38 
  39     public static void main(String[] args) throws Exception {
  40 
  41         /*
  42          * If MAX_VALUE is changed to MAX_VALUE - 1 below, the test passes
  43          * because (apparently) bad code is only generated when comparing
  44          * <= MAX_VALUE in the doTest method.
  45          */
  46         Test6992759 test = new Test6992759();
  47         for (int i = 0; i < N_TESTS; i += 1) {
  48             test.doTest(10, Integer.MAX_VALUE, i);
  49             //test.doTest(10, Integer.MAX_VALUE - 1, i);
  50         }
  51         System.out.println("No failure");
  52     }
  53 
  54     void doTest(int expected, int max, int i) {
  55         int counted;
  56         for (counted = 0;
  57              (counted <= max) && (counted < expected);
  58              counted += 1) {
  59         }
  60         if (counted != expected) {
  61             throw new RuntimeException("Failed test iteration=" + i +
  62                                        " max=" + max +
  63                                        " counted=" + counted +
  64                                        " expected=" + expected);
  65         }
  66     }
  67 }
  68