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/*
* Copyright (c) 2019, SAP SE. 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.
*/
/**
* @test
* @bug 8220374
* @summary C2: LoopStripMining doesn't strip as expected
* @requires vm.compiler2.enabled
*
* @library /test/lib
* @run driver compiler.loopstripmining.CheckLoopStripMining
*/
package compiler.loopstripmining;
import jdk.test.lib.Utils;
import jdk.test.lib.process.ProcessTools;
public class CheckLoopStripMining {
public static void main(String args[]) throws Exception {
ProcessTools.executeTestJvm(
"-XX:+UnlockDiagnosticVMOptions",
// to prevent biased locking handshakes from changing the timing of this test
"-XX:-UseBiasedLocking",
"-XX:+SafepointTimeout",
"-XX:+SafepointALot",
"-XX:+AbortVMOnSafepointTimeout",
"-XX:SafepointTimeoutDelay=" + Utils.adjustTimeout(500),
"-XX:GuaranteedSafepointInterval=" + Utils.adjustTimeout(500),
"-XX:-TieredCompilation",
"-XX:+UseCountedLoopSafepoints",
"-XX:LoopStripMiningIter=1000",
"-XX:LoopUnrollLimit=0",
"-XX:CompileCommand=compileonly,compiler.loopstripmining.CheckLoopStripMining$Test::test_loop",
"-Xcomp",
Test.class.getName()).shouldHaveExitValue(0)
.stdoutShouldContain("sum: 715827882");
}
public static class Test {
public static int test_loop(int x) {
int sum = 0;
if (x != 0) {
for (int y = 1; y < Integer.MAX_VALUE; ++y) {
if (y % x == 0) ++sum;
}
}
return sum;
}
public static void main(String args[]) {
int sum = test_loop(3);
System.out.println("sum: " + sum);
}
}
}
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