68 lines
2.7 KiB
Java
68 lines
2.7 KiB
Java
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @key stress randomness
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* @requires vm.compiler2.enabled
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* @bug 8268019
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* @summary Splitting an If through a dying loop header region that is not a LoopNode, yet, results in a dead data loop.
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* @run main/othervm -Xcomp -XX:-TieredCompilation -XX:CompileCommand=compileonly,compiler.c2.TestDeadLoopSplitIfLoop::test -XX:+UnlockDiagnosticVMOptions
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* -XX:+StressIGVN -XX:StressSeed=2382674767 -XX:CompileCommand=dontinline,compiler.c2.TestDeadLoopSplitIfLoop::test
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* compiler.c2.TestDeadLoopSplitIfLoop
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* @run main/othervm -Xcomp -XX:-TieredCompilation -XX:CompileCommand=compileonly,compiler.c2.TestDeadLoopSplitIfLoop::test -XX:+UnlockDiagnosticVMOptions
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* -XX:+StressIGVN -XX:CompileCommand=dontinline,compiler.c2.TestDeadLoopSplitIfLoop::test
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* compiler.c2.TestDeadLoopSplitIfLoop
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*/
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package compiler.c2;
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public class TestDeadLoopSplitIfLoop {
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int a;
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int b;
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boolean c;
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public static void main(String[] g) {
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TestDeadLoopSplitIfLoop h = new TestDeadLoopSplitIfLoop();
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h.test();
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}
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void test() {
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int e = 4;
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long f[] = new long[a];
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if (c) {
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} else if (c) {
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// Dead path is removed after parsing which results in a dead data loop for certain node orderings in IGVN.
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switch (126) {
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case 126:
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do {
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f[e] = b;
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switch (6) {
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case 7:
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f = f;
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}
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} while (e++ < 93);
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}
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}
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}
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}
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