98 lines
2.9 KiB
Java
98 lines
2.9 KiB
Java
/*
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* Copyright Amazon.com Inc. 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 8333791
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* @requires os.arch=="aarch64" | os.arch=="riscv64" | os.arch=="x86_64" | os.arch=="amd64"
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* @requires vm.gc.Parallel
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* @requires vm.compiler2.enabled
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* @summary Check stable field folding and barriers
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* @modules java.base/jdk.internal.vm.annotation
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* @library /test/lib /
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* @run driver compiler.c2.irTests.stable.StableRefFinalTest
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*/
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package compiler.c2.irTests.stable;
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import compiler.lib.ir_framework.*;
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import jdk.test.lib.Asserts;
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import jdk.internal.vm.annotation.Stable;
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public class StableRefFinalTest {
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public static void main(String[] args) {
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TestFramework tf = new TestFramework();
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tf.addTestClassesToBootClassPath();
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tf.addFlags(
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"-XX:+UnlockExperimentalVMOptions",
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"-XX:CompileThreshold=100",
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"-XX:-TieredCompilation",
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"-XX:+UseParallelGC"
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);
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tf.start();
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}
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static final Integer INTEGER = 42;
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static class Carrier {
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@Stable
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final Integer field;
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@ForceInline
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public Carrier(boolean init) {
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field = init ? INTEGER : null;
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}
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}
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static final Carrier BLANK_CARRIER = new Carrier(false);
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static final Carrier INIT_CARRIER = new Carrier(true);
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@Test
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@IR(counts = { IRNode.LOAD, ">0" })
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@IR(failOn = { IRNode.MEMBAR })
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static int testNoFold() {
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// Access should not be folded.
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// No barriers expected for plain fields.
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Integer i = BLANK_CARRIER.field;
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return i != null ? i : 0;
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}
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@Test
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@IR(failOn = { IRNode.LOAD, IRNode.MEMBAR })
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static int testFold() {
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// Access should be completely folded.
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Integer i = INIT_CARRIER.field;
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return i != null ? i : 0;
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}
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@Test
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@IR(counts = { IRNode.MEMBAR_STORESTORE, "1" })
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static Carrier testConstructorInit() {
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// Only the header+final barrier.
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return new Carrier(true);
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}
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}
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