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/dead07.
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.dead07.dead07
34  */
35 
36 package vm.compiler.jbe.dead.dead07;
37 
38 /* -- Test the elimination of dead assignment to static variable within an IF statement
39       Example:
40 
41       boolean bol;
42       static int i;
43 
44       void foo()
45       {
46          if (bol) i = 1;
47          if (bol) i = 2;
48       }
49 
50 The first assignment to i is dead, and can be eliminated.
51 
52  */
53 
54 public class dead07 {
55   boolean bol = true;
56   static int i = 6;
57 
main(String args[])58   public static void main(String args[]) {
59     dead07 dce = new dead07();
60 
61     System.out.println("f()="+dce.f()+"; fopt()="+dce.fopt());
62     if (dce.f() == dce.fopt()) {
63       System.out.println("Test dead07 Passed.");
64     } else {
65       throw new Error("Test dead07 Failed: f()=" + dce.f() + " != fopt()=" + dce.fopt());
66     }
67   }
68 
f()69   int f() {
70 
71     if (bol)
72       i = 1;
73     if (bol)
74       i = 2;
75     if (bol)
76       i = 3;
77     if (bol)
78       i = 4;
79     if (bol)
80       i = 5;
81     if (bol)
82       i = 6;
83     if (bol)
84       i = 7;
85     if (bol)
86       i = 8;
87 
88     if (bol)
89       i = 1;
90     if (bol)
91       i = 2;
92     if (bol)
93       i = 3;
94     if (bol)
95       i = 4;
96     if (bol)
97       i = 5;
98     if (bol)
99       i = 6;
100     if (bol)
101       i = 7;
102     if (bol)
103       i = 8;
104 
105     if (bol)
106       i = 1;
107     if (bol)
108       i = 2;
109     if (bol)
110       i = 3;
111     if (bol)
112       i = 4;
113     if (bol)
114       i = 5;
115     if (bol)
116       i = 6;
117     if (bol)
118       i = 7;
119     if (bol)
120       i = 8;
121 
122     return i;
123   }
124 
125   // Code fragment after dead code elimination
fopt()126   int fopt() {
127 
128     i = 8;
129     return i;
130   }
131 }
132