1 /*
   2  * Copyright (c) 2002, 2018, 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  *
  27  * @summary converted from VM Testbase runtime/jbe/dead/dead08.
  28  * VM Testbase keywords: [quick, runtime]
  29  *
  30  * @library /vmTestbase
  31  *          /test/lib
  32  * @run driver jdk.test.lib.FileInstaller . .
  33  * @run main/othervm vm.compiler.jbe.dead.dead08.dead08
  34  */
  35 
  36 package vm.compiler.jbe.dead.dead08;
  37 
  38 /* -- Test the elimination of dead assignment to class fields within an IF statement
  39 
  40 In the example below, the values assigned to i1-i7 in struct within th IF statement are never used,thus can be eliminated.
  41 
  42  */
  43 
  44 class struct {
  45     int i1 = 2;
  46     int i2 = 3;
  47     int i3 = 4;
  48     int i4 = 5;
  49     int i5 = 6;
  50     int i6 = 7;
  51     int i7 = 8;
  52     int i8 = 9;
  53 }
  54 
  55 public class dead08 {
  56   boolean bol = true;
  57 
  58   public static void main(String args[]) {
  59     dead08 dce = new dead08();
  60 
  61     System.out.println("f()="+dce.f()+"; fopt()="+dce.fopt());
  62     if (dce.f() == dce.fopt()) {
  63       System.out.println("Test dead08 Passed.");
  64     } else {
  65       throw new Error("Test dead08 Failed: f()=" + dce.f() + " != fopt()=" + dce.fopt());
  66     }
  67   }
  68 
  69   int f() {
  70     struct s = new struct();
  71 
  72     if (bol)
  73       s.i1 = 1;
  74     if (bol)
  75       s.i2 = 2;
  76     if (bol)
  77       s.i3 = 3;
  78     if (bol)
  79       s.i4 = 4;
  80     if (bol)
  81       s.i5 = 5;
  82     if (bol)
  83       s.i6 = 6;
  84     if (bol)
  85       s.i7 = 7;
  86     if (bol)
  87       s.i8 = 8;
  88 
  89     if (bol)
  90       s.i1 = 1;
  91     if (bol)
  92       s.i2 = 2;
  93     if (bol)
  94       s.i3 = 3;
  95     if (bol)
  96       s.i4 = 4;
  97     if (bol)
  98       s.i5 = 5;
  99     if (bol)
 100       s.i6 = 6;
 101     if (bol)
 102       s.i7 = 7;
 103     if (bol)
 104       s.i8 = 8;
 105 
 106     if (bol)
 107       s.i1 = 1;
 108     if (bol)
 109       s.i2 = 2;
 110     if (bol)
 111       s.i3 = 3;
 112     if (bol)
 113       s.i4 = 4;
 114     if (bol)
 115       s.i5 = 5;
 116     if (bol)
 117       s.i6 = 6;
 118     if (bol)
 119       s.i7 = 7;
 120     if (bol)
 121       s.i8 = 8;
 122 
 123     return s.i8;
 124   }
 125 
 126   // Code fragment after dead code elimination
 127   int fopt() {
 128     struct s = new struct();
 129 
 130     s.i8 = 8;
 131     return s.i8;
 132   }
 133 }