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81 lines
2.5 KiB
Java
81 lines
2.5 KiB
Java
/*
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* Copyright (c) 2026, 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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package compiler.intrinsics.object;
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import compiler.lib.ir_framework.Check;
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import compiler.lib.ir_framework.IR;
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import compiler.lib.ir_framework.IRNode;
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import compiler.lib.ir_framework.Test;
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import compiler.lib.ir_framework.TestFramework;
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/*
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* @test
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* @bug 8372845
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* @summary Verify constant folding is possible for identity hash code
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* @library /test/lib /
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* @requires vm.compiler2.enabled
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* @run driver ${test.main.class}
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*/
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public class IdentityHashCodeFold {
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public static void main(String[] args) {
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TestFramework.run();
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}
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static final Object a = new Object(), b = new Object(), NULL = null;
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static final int expectedSum;
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static {
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// This code runs in the interpreter
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expectedSum = System.identityHashCode(a) + System.identityHashCode(b);
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}
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@Test
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@IR(failOn = {IRNode.ADD_I})
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public int testSum() {
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return a.hashCode() + System.identityHashCode(b);
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}
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@Check(test = "testSum")
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public void checkSum(int sum) {
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if (sum != expectedSum) {
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throw new IllegalStateException("Unexpected hash sum, expected %X actual %X".formatted(expectedSum, sum));
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}
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}
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@Test
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@IR(failOn = {IRNode.ADD_I})
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public int testNullSum() {
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return 42 + System.identityHashCode(NULL);
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}
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@Check(test = "testNullSum")
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public void checkNullSum(int sum) {
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if (sum != 42) {
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throw new IllegalStateException("Unexpected null hash sum, expected %X actual %X".formatted(42, sum));
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}
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}
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}
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