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/*
* Copyright (c) 2023, 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.
*/
/*
* @test
* @bug 8303466
* @summary Verify that AddL->MaxL->AddL->MaxL chains of unroll limit adjustments collapse.
* If it did not collapse, we would have about 10 MaxL/MinL. With the collapse, it
* is now one or two.
* @library /test/lib /
* @requires vm.compiler2.enabled
* @run driver compiler.loopopts.TestLoopLimitSubtractionsCollapse
*/
package compiler.loopopts;
import compiler.lib.ir_framework.*;
public class TestLoopLimitSubtractionsCollapse {
static int START = 0;
static int FINISH = 512;
static int RANGE = 512;
static byte[] data1 = new byte[RANGE];
static byte[] data2 = new byte[RANGE];
public static void main(String[] args) {
TestFramework.run();
}
@Test
@Warmup(0)
@IR(counts = {IRNode.MAX_L, "> 0", IRNode.MAX_L, "<= 2"},
phase = CompilePhase.PHASEIDEALLOOP_ITERATIONS)
public static void test1() {
for (int j = START; j < FINISH; j++) {
data1[j] = (byte)(data1[j] * 11);
}
}
@Test
@Warmup(0)
@IR(counts = {IRNode.MIN_L, "> 0", IRNode.MIN_L, "<= 2"},
phase = CompilePhase.PHASEIDEALLOOP_ITERATIONS)
public static void test2() {
for (int j = FINISH-1; j >= START; j--) {
data2[j] = (byte)(data2[j] * 11);
}
}
}
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