jdk8-mips64-public/langtools: test/tools/javac/BadOptimization/DeadCode2.java@4868a36f6fd8

     1 /*

     2  * Copyright (c) 1999, 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  */

    24 /*

    25  * @test

    26  * @bug 4057345 4120016 4120014

    27  * @summary try-catch 2:  Verify that overzealous dead-code elimination no

    28  * longer removes live code.

    29  * @author dps

    30  *

    31  * @run clean DeadCode2

    32  * @run compile -O DeadCode2.java

    33  * @run main DeadCode2

    34  */

    36 class cls

    37 {

    38    int [] ai = null;

    39 }

    41 public class DeadCode2 extends cls

    42 {

    43     int [] bi = null;

    45     static int[] func()  {  return (int[])null; }

    47     public static void main(String argv[]) {

    48         int [] ci = null;

    49         int m = 0;

    50         int errcnt = 0;

    52         try { int i = func()[m = 7]; }

    53         catch(Exception e) {  System.out.println(e + " found "); errcnt++; }

    54         try { DeadCode2 ox = new DeadCode2(); int i = ox.ai[m = 7]; }

    55         catch(Exception e) {  System.out.println(e + " found "); errcnt++; }

    56         try { DeadCode2 ox = new DeadCode2(); int i = ox.bi[m = 7]; }

    57         catch(Exception e) {  System.out.println(e + " found "); errcnt++; }

    58         try { int i = ci[m = 7]; }

    59         catch(Exception e) {  System.out.println(e + " found "); errcnt++; }

    60         try { int i = ((int[])null)[0]; }

    61         catch(Exception e) {  System.out.println(e + " found "); errcnt++; }

    63         if (errcnt != 5)

    64             throw new RuntimeException("live code accidentally removed");

    65     }

    66 }

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