112 lines
3.0 KiB
Java
112 lines
3.0 KiB
Java
/*
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* Copyright (c) 2022, Red Hat, Inc. 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 8296545
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* @requires vm.compiler2.enabled
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* @summary Blackholes should allow load optimizations
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* @library /test/lib /
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* @run driver compiler.c2.irTests.blackhole.BlackholeLoadOptoTest
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*/
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package compiler.c2.irTests.blackhole;
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import compiler.lib.ir_framework.*;
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import jdk.test.lib.Asserts;
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public class BlackholeLoadOptoTest {
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public static void main(String[] args) {
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TestFramework.runWithFlags(
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"-XX:+UnlockExperimentalVMOptions",
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"-XX:CompileThreshold=100",
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"-XX:-TieredCompilation",
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"-XX:CompileCommand=blackhole,compiler.c2.irTests.blackhole.BlackholeLoadOptoTest::blackhole",
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"-XX:CompileCommand=dontinline,compiler.c2.irTests.blackhole.BlackholeLoadOptoTest::dontinline"
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);
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}
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static int x, y;
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/*
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* Negative test: check that dangling expressions are eliminated
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*/
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@Test
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@IR(failOn = {IRNode.LOAD_I, IRNode.MUL_I})
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static void testNothing() {
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int r1 = x * y;
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int r2 = x * y;
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}
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@Run(test = "testNothing")
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static void runNothing() {
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testNothing();
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}
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/*
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* Auxiliary test: check that dontinline method does break optimizations
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*/
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@Test
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@IR(counts = {IRNode.LOAD_I, "4"})
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@IR(counts = {IRNode.MUL_I, "2"})
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static void testDontline() {
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int r1 = x * y;
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dontinline(r1);
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int r2 = x * y;
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dontinline(r2);
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}
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static void dontinline(int x) {}
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@Run(test = "testDontline")
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static void runDontinline() {
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testDontline();
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}
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/*
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* Positive test: check that blackhole does not break optimizations
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*/
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@Test
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@IR(counts = {IRNode.LOAD_I, "2"})
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@IR(counts = {IRNode.MUL_I, "1"})
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static void testBlackholed() {
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int r1 = x * y;
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blackhole(r1);
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int r2 = x * y;
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blackhole(r2);
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}
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static void blackhole(int x) {}
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@Run(test = "testBlackholed")
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static void runBlackholed() {
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testBlackholed();
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}
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}
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