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/*
* Copyright (c) 2025, Oracle and/or its affiliates. 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.loopopts.superword;
import compiler.lib.ir_framework.*;
/*
* @test
* @bug 8352587
* @summary IR test to ensure that PeelMainPost cases does not get Multiversioned.
* @library /test/lib /
* @run driver compiler.loopopts.superword.TestPeelMainPostNoMultiversioning
*/
public class TestPeelMainPostNoMultiversioning {
public static void main(String[] args) {
TestFramework framework = new TestFramework(TestPeelMainPostNoMultiversioning.class);
// No traps means we cannot use the predicates version for SuperWord / AutoVectorization,
// and instead use multiversioning directly.
framework.addFlags("-XX:-TieredCompilation", "-XX:PerMethodTrapLimit=0");
framework.setDefaultWarmup(0); // simulates Xcomp
framework.start();
}
public static long value = 1;
public static long multiplicator = 3;
@Test
@IR(counts = {".*multiversion.*", "= 0"},
phase = CompilePhase.PHASEIDEALLOOP1)
@IR(counts = {".*multiversion.*", "= 0"},
phase = CompilePhase.PHASEIDEALLOOP_ITERATIONS)
@IR(counts = {".*multiversion.*", "= 0"},
phase = CompilePhase.PRINT_IDEAL)
// We are checking it for a few phases, just to make sure we are not seeing multiversioning
// at any point.
public static void test() {
long x = value;
long y = multiplicator;
for (int i = 0; i < 10_000; i++) {
x *= y; // No memory load/store -> PeelMainPost
}
value = x;
}
}
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