127 lines
5.5 KiB
Java
127 lines
5.5 KiB
Java
/*
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* Copyright (c) 2016, 2022, 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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/**
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* @test
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* @bug 6869327
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* @summary Test that C2 flag UseCountedLoopSafepoints ensures a safepoint is kept in a CountedLoop
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* @library /test/lib /
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* @requires vm.compMode != "Xint" & vm.flavor == "server" & (vm.opt.TieredStopAtLevel == null | vm.opt.TieredStopAtLevel == 4) & vm.debug == true
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* @requires !vm.emulatedClient & !vm.graal.enabled
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* @modules java.base/jdk.internal.misc
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run driver compiler.loopopts.UseCountedLoopSafepointsTest
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*/
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package compiler.loopopts;
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import jdk.test.lib.Platform;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import java.util.List;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import jdk.test.lib.Asserts;
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/* Idea of this test is to check if ideal graph has CountedLoopEnd->SafePoint edge in case
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of UseCountedLoopSafepoint enabled and has no such edge in case it's disabled. Restricting
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compilation to testMethod only will leave only one counted loop (the one in testedMethod) */
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public class UseCountedLoopSafepointsTest {
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public static void main (String args[]) {
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check(true); // check ideal graph with UseCountedLoopSafepoint enabled
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check(false); // ... and disabled
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}
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private static void check(boolean enabled) {
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OutputAnalyzer oa;
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try {
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oa = ProcessTools.executeTestJava(
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"-XX:+UnlockDiagnosticVMOptions", "-Xbootclasspath/a:.",
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"-XX:" + (enabled ? "+" : "-") + "UseCountedLoopSafepoints",
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"-XX:+WhiteBoxAPI",
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"-XX:-Inline", "-Xbatch", "-XX:+PrintIdeal", "-XX:LoopUnrollLimit=0",
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"-XX:CompileOnly=" + UseCountedLoopSafepoints.class.getName() + "::testMethod",
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UseCountedLoopSafepoints.class.getName());
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} catch (Exception e) {
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throw new Error("Exception launching child for case enabled=" + enabled + " : " + e, e);
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}
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oa.shouldHaveExitValue(0);
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// parse output in seach of SafePoint and CountedLoopEnd nodes
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List<Node> safePoints = new ArrayList<>();
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List<Node> loopEnds = new ArrayList<>();
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for (String line : oa.getOutput().split("\\n")) {
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int separatorIndex = line.indexOf(" ===");
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if (separatorIndex > -1) {
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String header = line.substring(0, separatorIndex);
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if (header.endsWith("SafePoint")) {
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safePoints.add(new Node("SafePoint", line));
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} else if (header.endsWith("CountedLoopEnd")) {
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loopEnds.add(new Node("CountedLoopEnd", line));
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}
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}
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}
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// now, find CountedLoopEnd -> SafePoint edge
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boolean found = false;
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for (Node loopEnd : loopEnds) {
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found |= loopEnd.to.stream()
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.filter(id -> nodeListHasElementWithId(safePoints, id))
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.findAny()
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.isPresent();
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}
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Asserts.assertEQ(enabled, found, "Safepoint " + (found ? "" : "not ") + "found");
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}
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private static boolean nodeListHasElementWithId(List<Node> list, int id) {
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return list.stream()
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.filter(node -> node.id == id)
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.findAny()
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.isPresent();
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}
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private static class Node {
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public final int id;
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public final List<Integer> from;
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public final List<Integer> to;
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public Node(String name, String str) {
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List<Integer> tmpFrom = new ArrayList<>();
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List<Integer> tmpTo = new ArrayList<>();
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// parse string like: " $id $name === $to1 $to2 ... [[ $from1 $from2 ... ]] $anything"
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// example: 318 SafePoint === 317 1 304 1 1 10 308 [[ 97 74 ]] ...
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id = Integer.parseInt(str.substring(1, str.indexOf(name)).trim());
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Arrays.stream(str.substring(str.indexOf("===") + 4, str.indexOf("[[")).trim().split("\\s+"))
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.map(Integer::parseInt)
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.forEach(tmpTo::add);
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Arrays.stream(str.substring(str.indexOf("[[") + 3, str.indexOf("]]")).trim().split("\\s+"))
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.map(Integer::parseInt)
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.forEach(tmpFrom::add);
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this.from = Collections.unmodifiableList(tmpFrom);
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this.to = Collections.unmodifiableList(tmpTo);
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}
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}
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}
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