71 lines
2.3 KiB
Java
71 lines
2.3 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 8322854
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* @summary Check that the RAM optimization works when there is a memory loop.
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* @library /test/lib /
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* @requires vm.compiler2.enabled
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* @run main/othervm -XX:CompileCommand=compileonly,*TestReduceAllocationAndMemoryLoop*::test*
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* -XX:-TieredCompilation -Xbatch
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* compiler.c2.TestReduceAllocationAndMemoryLoop
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*/
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package compiler.c2;
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public class TestReduceAllocationAndMemoryLoop {
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public static void main(String[] args) throws Exception {
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// Warmup
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for (int i = 0; i < 50_000; ++i) {
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test(false, 10);
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}
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// Trigger deoptimization
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MyClass obj = test(false, 11);
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if (obj.val != 42) {
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throw new RuntimeException("Test failed, val = " + obj.val);
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}
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}
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static class MyClass {
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final int val;
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public MyClass(int val) {
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this.val = val;
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}
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}
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public static MyClass test(boolean alwaysFalse, int limit) {
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for (int i = 0; ; ++i) {
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MyClass obj = new MyClass(42);
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if (alwaysFalse || i > 10) {
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return obj;
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}
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if (i == limit) {
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return null;
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}
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}
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}
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}
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