1 /*
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 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 5  * This code is free software; you can redistribute it and/or modify it
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 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).
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15  * You should have received a copy of the GNU General Public License version
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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
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22  */
23 
24 /**
25  * @test
26  * @bug 8386676
27  * @summary [lworld] Infinite loop when pushing inline types down though phis during IGVN
28  * @enablePreview
29  * @modules java.base/jdk.internal.value
30  *          java.base/jdk.internal.vm.annotation
31  * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+StressIGVN
32  *                   -XX:CompileCommand=compileonly,${test.main.class}::test -Xbatch
33  *                   -XX:-UseOnStackReplacement -XX:StressSeed=3696073068 -XX:CompileTaskTimeout=8000 ${test.main.class}
34  * @run main/othervm -XX:+UnlockDiagnosticVMOptions  -XX:+IgnoreUnrecognizedVMOptions -XX:+StressIGVN
35  *                   -XX:CompileCommand=compileonly,${test.main.class}::test -Xbatch
36  *                   -XX:-UseOnStackReplacement -XX:CompileTaskTimeout=8000 ${test.main.class}
37  */
38 
39 package compiler.valhalla.inlinetypes;
40 
41 import jdk.internal.vm.annotation.LooselyConsistentValue;
42 import jdk.internal.vm.annotation.NullRestricted;
43 
44 public class TestInlineTypeInfinitePushThruPhi {
45     static V2 v2 = new V2(3);
46 
47     public static void main(String[] args) {
48         for (int i = 0; i < 20_000; i++) {
49             test();
50         }
51     }
52 
53     public static void test() {
54         V1 v1 = new V1(null, v2);
55         for (int i = 0; i < 100; i++) {
56             v1 = new V1(v1.x, v1.y);
57         }
58     }
59 
60     @LooselyConsistentValue
61     static value class V1 {
62         V2 x;
63         @NullRestricted
64         V2 y;
65 
66         V1(V2 x, V2 y) {
67             this.x = x;
68             this.y = y;
69         }
70     }
71 
72     static value class V2 {
73         int i;
74 
75         V2(int i) {
76             this.i = i;
77         }
78     }
79 }