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/*
* Copyright (c) 2022, Red Hat, Inc. 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.
*/
package compiler.c2.irTests;
import compiler.lib.ir_framework.*;
/*
* @test
* @bug 8282045
* @summary When loop strip mining fails, safepoints are removed from loop anyway
* @library /test/lib /
* @requires vm.compiler2.enabled
* @run driver compiler.c2.irTests.TestStripMiningDropsSafepoint
*/
public class TestStripMiningDropsSafepoint {
public static void main(String[] args) {
TestFramework.runWithFlags("-XX:+UseCountedLoopSafepoints", "-XX:LoopStripMiningIter=1000", "-XX:LoopMaxUnroll=1", "-XX:-RangeCheckElimination");
TestFramework.runWithFlags("-XX:+UseCountedLoopSafepoints", "-XX:LoopStripMiningIter=1000", "-XX:LoopMaxUnroll=1", "-XX:-RangeCheckElimination", "-XX:-PartialPeelLoop");
}
@Test
@IR(applyIf = { "PartialPeelLoop", "true" }, counts = {IRNode.COUNTED_LOOP, "1", IRNode.OUTER_STRIP_MINED_LOOP, "1", IRNode.SAFEPOINT, "1" })
private static void test1(int[] dst, int[] src) {
// Partial peel is applied. No side effect between exit and
// safepoint.
for (int i = 0; ; ) {
// prevent ciTypeFlow from cloning head
synchronized (new Object()) {}
i++;
if (i >= src.length) {
break;
}
dst[i] = src[i];
if (i / 2 >= 2000) {
break;
}
}
}
@Run(test = "test1")
private static void test1_runner() {
int[] array1 = new int[1000];
int[] array2 = new int[10000];
test1(array1, array1);
test1(array2, array2);
}
@Test
@IR(applyIf = { "PartialPeelLoop", "true" }, counts = {IRNode.COUNTED_LOOP, "1", IRNode.SAFEPOINT, "1" })
@IR(applyIf = { "PartialPeelLoop", "true" }, failOn = { IRNode.OUTER_STRIP_MINED_LOOP})
private static void test2(int[] dst, int[] src) {
// Partial peel is applied. Some side effect between exit and
// safepoint.
int v = src[0];
for (int i = 0; ; ) {
synchronized (new Object()) {}
dst[i] = v;
i++;
if (i >= src.length) {
break;
}
v = src[i];
if (i / 2 >= 2000) {
break;
}
}
}
@Run(test = "test2")
private static void test2_runner() {
int[] array1 = new int[1000];
int[] array2 = new int[10000];
test2(array1, array1);
test2(array2, array2);
}
@Test
@IR(applyIf = { "PartialPeelLoop", "false" }, counts = {IRNode.COUNTED_LOOP, "1", IRNode.OUTER_STRIP_MINED_LOOP, "1", IRNode.SAFEPOINT, "1" })
private static void test3(int[] dst, int[] src) {
int v = src[0];
for (int i = 0; ; ) {
synchronized (new Object()) {}
dst[i] = v;
int inc = test3_helper(2);
v = src[i];
i += (inc / 2);
if (i >= src.length) {
break;
}
for (int j = 0; j < 10; j++) {
}
// safepoint on backedge
}
}
private static int test3_helper(int stop) {
int i = 1;
do {
synchronized (new Object()) {}
i *= 2;
} while (i < stop);
return i;
}
@Run(test = "test3")
private static void test3_runner() {
int[] array1 = new int[1000];
test3(array1, array1);
test3_helper(10);
}
}
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