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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.*;
import jdk.test.lib.Utils;
import java.util.Random;
/*
* @test
* @bug 8278228
* @summary C2: Improve identical back-to-back if elimination
* @library /test/lib /
* @requires vm.compiler2.enabled
* @run driver compiler.c2.irTests.TestSkeletonPredicates
*/
public class TestSkeletonPredicates {
public static void main(String[] args) {
TestFramework.runWithFlags("-XX:-UseLoopPredicate", "-XX:LoopUnrollLimit=240", "-XX:+StressIGVN", "-XX:StressSeed=255527877");
TestFramework.runWithFlags("-XX:-UseLoopPredicate", "-XX:LoopUnrollLimit=240", "-XX:+StressIGVN");
}
static volatile int barrier;
@ForceInline
static boolean test1_helper(int start, int stop, double[] array1, double[] array2) {
for (int i = start; i < stop; i++) {
if ((i % 2) == 0) {
array1[i] = 42.42;
} else {
barrier = 0x42;
}
}
return false;
}
@Test
@IR(counts = { IRNode.COUNTEDLOOP, "3" })
static double[] test1(int stop, double[] array2) {
double[] array1 = null;
array1 = new double[10];
for (int j = 0; j < stop; j++) {
if (test1_helper(8, j, array1, array2)) {
return null;
}
}
return array1;
}
@Run(test = "test1")
void test1_runner() {
double[] array2 = new double[10];
double[] array3 = new double[1000];
test1_helper(1, 1000, array3, array3);
test1(11, array3);
}
}
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