134 lines
4.4 KiB
Java
134 lines
4.4 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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package compiler.c2.irTests;
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import compiler.lib.ir_framework.*;
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/*
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* @test
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* @bug 8282045
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* @summary When loop strip mining fails, safepoints are removed from loop anyway
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* @library /test/lib /
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* @requires vm.compiler2.enabled
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* @run driver compiler.c2.irTests.TestStripMiningDropsSafepoint
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*/
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public class TestStripMiningDropsSafepoint {
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public static void main(String[] args) {
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TestFramework.runWithFlags("-XX:+UseCountedLoopSafepoints", "-XX:LoopStripMiningIter=1000", "-XX:LoopMaxUnroll=1", "-XX:-RangeCheckElimination");
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TestFramework.runWithFlags("-XX:+UseCountedLoopSafepoints", "-XX:LoopStripMiningIter=1000", "-XX:LoopMaxUnroll=1", "-XX:-RangeCheckElimination", "-XX:-PartialPeelLoop");
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}
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@Test
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@IR(applyIf = { "PartialPeelLoop", "true" }, counts = {IRNode.COUNTED_LOOP, "1", IRNode.OUTER_STRIP_MINED_LOOP, "1", IRNode.SAFEPOINT, "1" })
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private static void test1(int[] dst, int[] src) {
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// Partial peel is applied. No side effect between exit and
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// safepoint.
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for (int i = 0; ; ) {
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// prevent ciTypeFlow from cloning head
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synchronized (new Object()) {}
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i++;
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if (i >= src.length) {
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break;
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}
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dst[i] = src[i];
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if (i / 2 >= 2000) {
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break;
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}
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}
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}
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@Run(test = "test1")
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private static void test1_runner() {
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int[] array1 = new int[1000];
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int[] array2 = new int[10000];
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test1(array1, array1);
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test1(array2, array2);
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}
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@Test
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@IR(applyIf = { "PartialPeelLoop", "true" }, counts = {IRNode.COUNTED_LOOP, "1", IRNode.SAFEPOINT, "1" })
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@IR(applyIf = { "PartialPeelLoop", "true" }, failOn = { IRNode.OUTER_STRIP_MINED_LOOP})
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private static void test2(int[] dst, int[] src) {
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// Partial peel is applied. Some side effect between exit and
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// safepoint.
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int v = src[0];
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for (int i = 0; ; ) {
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synchronized (new Object()) {}
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dst[i] = v;
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i++;
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if (i >= src.length) {
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break;
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}
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v = src[i];
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if (i / 2 >= 2000) {
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break;
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}
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}
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}
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@Run(test = "test2")
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private static void test2_runner() {
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int[] array1 = new int[1000];
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int[] array2 = new int[10000];
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test2(array1, array1);
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test2(array2, array2);
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}
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@Test
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@IR(applyIf = { "PartialPeelLoop", "false" }, counts = {IRNode.COUNTED_LOOP, "1", IRNode.OUTER_STRIP_MINED_LOOP, "1", IRNode.SAFEPOINT, "1" })
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private static void test3(int[] dst, int[] src) {
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int v = src[0];
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for (int i = 0; ; ) {
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synchronized (new Object()) {}
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dst[i] = v;
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int inc = test3_helper(2);
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v = src[i];
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i += (inc / 2);
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if (i >= src.length) {
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break;
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}
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for (int j = 0; j < 10; j++) {
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}
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// safepoint on backedge
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}
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}
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private static int test3_helper(int stop) {
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int i = 1;
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do {
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synchronized (new Object()) {}
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i *= 2;
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} while (i < stop);
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return i;
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}
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@Run(test = "test3")
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private static void test3_runner() {
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int[] array1 = new int[1000];
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test3(array1, array1);
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test3_helper(10);
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}
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}
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