77 lines
2.4 KiB
Java
77 lines
2.4 KiB
Java
/*
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* Copyright (c) 2024, 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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* @bug 8336726
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* @summary Test that post-parse call devirtualization works when call does not have an IO projection.
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* @run main/othervm -XX:-TieredCompilation -Xcomp -XX:CompileCommand=compileonly,TestCallDevirtualizationWithInfiniteLoop::test
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* TestCallDevirtualizationWithInfiniteLoop
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*/
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public class TestCallDevirtualizationWithInfiniteLoop {
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static interface I {
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public void method();
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}
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static final class A implements I {
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@Override
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public void method() { };
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}
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static final class B implements I {
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@Override
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public void method() { };
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}
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static final A a = new A();
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static final B b = new B();
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public static void test(boolean flag) {
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// Avoid executing endless loop
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if (flag) {
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return;
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}
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// We only know after loop opts that the receiver type is B.
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I recv = a;
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for (int i = 0; i < 3; ++i) {
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if (i > 1) {
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recv = b;
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}
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}
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// Post-parse call devirtualization will then convert below
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// virtual call to a static call.
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recv.method();
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// Endless loop which does not use IO. As a result the IO
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// projection of the call is removed unexpectedly.
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while (true) { }
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}
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public static void main(String[] args) {
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test(true);
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}
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}
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