240 lines
8.5 KiB
Java
240 lines
8.5 KiB
Java
/*
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* Copyright (c) 2014, 2023, 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 LevelTransitionTest
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* @requires vm.compMode != "Xcomp"
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* @summary Test the correctness of compilation level transitions for different methods
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* @library /test/lib /
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* @modules java.base/jdk.internal.misc
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* java.management
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*
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* @build jdk.test.whitebox.WhiteBox
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* compiler.tiered.LevelTransitionTest
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm/timeout=240 -Xmixed -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
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* -XX:+WhiteBoxAPI -XX:+TieredCompilation
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* -XX:-BackgroundCompilation
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* -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCaseHelper::*
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* -XX:CompileCommand=compileonly,compiler.tiered.LevelTransitionTest$ExtendedTestCase$CompileMethodHolder::*
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* compiler.tiered.LevelTransitionTest
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*/
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package compiler.tiered;
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import compiler.whitebox.CompilerWhiteBoxTest;
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import compiler.whitebox.SimpleTestCase;
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import jdk.test.lib.Platform;
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import jtreg.SkippedException;
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import java.lang.reflect.Executable;
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import java.lang.reflect.Method;
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import java.util.concurrent.Callable;
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public class LevelTransitionTest extends TieredLevelsTest {
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/**
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* Shows if method was profiled by being executed on levels 2 or 3
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*/
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protected boolean isMethodProfiled;
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private int transitionCount;
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public static void main(String[] args) throws Throwable {
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if (CompilerWhiteBoxTest.skipOnTieredCompilation(false)) {
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throw new SkippedException("Test isn't applicable for non-tiered mode");
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}
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CompilerWhiteBoxTest.main(LevelTransitionTest::new, args);
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// run extended test cases
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for (TestCase testCase : ExtendedTestCase.values()) {
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new LevelTransitionTest(testCase).runTest();
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}
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}
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protected LevelTransitionTest(TestCase testCase) {
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super(testCase);
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isMethodProfiled = testCase.isOsr(); // OSR methods were already profiled by warmup
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transitionCount = 0;
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}
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@Override
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protected void test() throws Exception {
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checkTransitions();
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deoptimize();
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printInfo();
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if (testCase.isOsr()) {
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// deoptimization makes the following transitions be unstable
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// methods go to level 3 before 4 because of uncommon_trap and reprofile
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return;
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}
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checkTransitions();
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}
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/**
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* Makes and verifies transitions between compilation levels
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*/
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protected void checkTransitions() throws Exception {
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checkNotCompiled();
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boolean finish = false;
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while (!finish) {
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System.out.printf("Level transition #%d%n", ++transitionCount);
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int newLevel;
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int current = getCompLevel();
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int expected = getNextLevel(current);
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System.out.println("Levels, current: " + current + ", expected: " + expected);
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if (current == expected) {
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// if we are on expected level, just execute it more
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// to ensure that the level won't change
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System.out.printf("Method %s is already on expected level %d%n", method, expected);
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compile();
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newLevel = getCompLevel();
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finish = true;
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} else {
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newLevel = changeCompLevel();
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System.out.printf("Method %s has been compiled to level %d. Expected level is %d%n",
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method, newLevel, expected);
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finish = false;
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}
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checkLevel(expected, newLevel);
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printInfo();
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}
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;
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}
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/**
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* Gets next expected level for the test case on each transition.
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*
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* @param currentLevel a level the test case is compiled on
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* @return expected compilation level
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*/
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protected int getNextLevel(int currentLevel) {
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int nextLevel = currentLevel;
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switch (currentLevel) {
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case CompilerWhiteBoxTest.COMP_LEVEL_NONE:
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nextLevel = isTrivial() ? CompilerWhiteBoxTest.COMP_LEVEL_SIMPLE :
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isMethodProfiled ? CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION :
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CompilerWhiteBoxTest.COMP_LEVEL_FULL_PROFILE;
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break;
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case CompilerWhiteBoxTest.COMP_LEVEL_LIMITED_PROFILE:
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case CompilerWhiteBoxTest.COMP_LEVEL_FULL_PROFILE:
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nextLevel = CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION;
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isMethodProfiled = true;
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break;
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}
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nextLevel = isTrivial() ? CompilerWhiteBoxTest.COMP_LEVEL_SIMPLE : nextLevel;
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return Math.min(nextLevel, CompilerWhiteBoxTest.TIERED_STOP_AT_LEVEL);
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}
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/**
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* Determines if tested method should be handled as trivial
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*
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* @return {@code true} for trivial methods, {@code false} otherwise
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*/
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protected boolean isTrivial() {
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return testCase == ExtendedTestCase.ACCESSOR_TEST
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|| testCase == SimpleTestCase.METHOD_TEST
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|| testCase == SimpleTestCase.STATIC_TEST
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|| testCase == ExtendedTestCase.TRIVIAL_CODE_TEST;
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}
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/**
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* Invokes {@linkplain #method} until its compilation level is changed.
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* Note that if the level won't change, it will be an endless loop
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*
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* @return compilation level the {@linkplain #method} was compiled on
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*/
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protected int changeCompLevel() {
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int currentLevel = getCompLevel();
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int newLevel = currentLevel;
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int result = 0;
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while (currentLevel == newLevel) {
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result = compile(1);
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if (WHITE_BOX.isMethodCompiled(method, testCase.isOsr())) {
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newLevel = getCompLevel();
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}
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}
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return newLevel;
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}
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private static enum ExtendedTestCase implements CompilerWhiteBoxTest.TestCase {
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ACCESSOR_TEST("accessor"),
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NONTRIVIAL_METHOD_TEST("nonTrivialMethod"),
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TRIVIAL_CODE_TEST("trivialCode");
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private final Executable executable;
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private final Callable<Integer> callable;
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@Override
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public Executable getExecutable() {
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return executable;
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}
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@Override
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public Callable<Integer> getCallable() {
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return callable;
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}
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@Override
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public boolean isOsr() {
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return false;
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}
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private ExtendedTestCase(String methodName) {
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this.executable = MethodHelper.getMethod(CompileMethodHolder.class, methodName);
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this.callable = MethodHelper.getCallable(new CompileMethodHolder(), methodName);
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}
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private static class CompileMethodHolder {
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// Make sure that loop backedge is never taken to prevent unexpected OSR compilations.
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private final int iter = 1;
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private int field = 42;
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/**
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* Non-trivial method for threshold policy: contains loops
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*/
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public int nonTrivialMethod() {
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int acc = 0;
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for (int i = 0; i < iter; i++) {
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acc += i;
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}
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return acc;
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}
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/**
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* Field accessor method
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*/
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public int accessor() {
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return field;
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}
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/**
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* Method considered as trivial by type (constant getter)
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*/
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public int trivialCode() {
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return 0x42;
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}
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}
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}
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}
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