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[JIT] enable polymorphic inlining and devirtualization
Summary: inline and devirtualize more receivers in polymorphic conditions Testing: jtreg and ci Reviewers: maoliang, Kuaiwei Issue: #917
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test/hotspot/jtreg/compiler/inlining/TestPolymorphicInlining.java
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| /* | ||
| * Copyright (c) 2025, Alibaba Group Holding Limited. All rights reserved. | ||
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| * | ||
| * This code is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License version 2 only, as | ||
| * published by the Free Software Foundation. | ||
| * | ||
| * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| * version 2 for more details (a copy is included in the LICENSE file that | ||
| * accompanied this code). | ||
| * | ||
| * You should have received a copy of the GNU General Public License version | ||
| * 2 along with this work; if not, write to the Free Software Foundation, | ||
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| * | ||
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| * or visit www.oracle.com if you need additional information or have any | ||
| * questions. | ||
| */ | ||
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|
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| /* | ||
| * @test TestPolymorphicInlining | ||
| * @summary invoke tripple morphic method and see if either one is inlined. | ||
| * @library /test/lib | ||
| * @run main TestPolymorphicInlining | ||
| */ | ||
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| import jdk.test.lib.process.OutputAnalyzer; | ||
| import jdk.test.lib.process.ProcessTools; | ||
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| public class TestPolymorphicInlining { | ||
| public static void main(String[] args) throws Exception { | ||
| ProcessBuilder pb1 = ProcessTools.createJavaProcessBuilder( | ||
| "-XX:+UnlockDiagnosticVMOptions", | ||
| "-XX:+PrintInlining", | ||
| "-XX:+PolymorphicInlining", | ||
| Test.class.getName()); | ||
| OutputAnalyzer output1 = new OutputAnalyzer(pb1.start()); | ||
| output1.shouldMatch("TestPolymorphicInlining\\$Test\\$Child\\d::foo.*inline"); | ||
| output1.shouldHaveExitValue(0); | ||
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| ProcessBuilder pb2 = ProcessTools.createJavaProcessBuilder( | ||
| "-XX:+UnlockDiagnosticVMOptions", | ||
| "-XX:+PrintInlining", | ||
| "-XX:-PolymorphicInlining", | ||
| Test.class.getName()); | ||
| OutputAnalyzer output2 = new OutputAnalyzer(pb2.start()); | ||
| output2.shouldNotContain("TestPolymorphicInlining$Test$Child"); | ||
| output2.shouldHaveExitValue(0); | ||
| } | ||
| static class Test { | ||
| private final int x = -1; | ||
| private static int n = 1000000; | ||
| private final Parent c1 = new Child1(); | ||
| private final Parent c2 = new Child2(); | ||
| private final Parent c3 = new Child3(); | ||
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| class Parent { | ||
| int foo() { | ||
| return x; | ||
| } | ||
| } | ||
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| class Child1 extends Parent { | ||
| int foo() { | ||
| return x; | ||
| } | ||
| } | ||
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| class Child2 extends Parent { | ||
| int foo() { | ||
| return x; | ||
| } | ||
| } | ||
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| class Child3 extends Parent { | ||
| int foo() { | ||
| return x; | ||
| } | ||
| } | ||
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| int invoke(Parent p) { | ||
| return p.foo(); | ||
| } | ||
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| public static void main(String[] args) throws Exception { | ||
| Test test = new Test(); | ||
| int x = 0; | ||
| while (n-- > 0) { | ||
| x += test.invoke(test.c1) + test.invoke(test.c2) + test.invoke(test.c3); | ||
| } | ||
| } | ||
| } | ||
| } |