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/*
* Copyright (c) 2021, Alibaba Group Holding Limited. 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 8267239
* @author Yi Yang
* @summary apply RCE for % operations
* @requires vm.compiler1.enabled
* @library /test/lib
* @run main/othervm -XX:TieredStopAtLevel=1 -XX:+TieredCompilation
* -XX:CompileCommand=compileonly,*ArithmeticRemRCE.test*
* compiler.c1.ArithmeticRemRCE
*/
package compiler.c1;
import jdk.test.lib.Asserts;
public class ArithmeticRemRCE {
static int field = 1000;
static void test1() {
// seq should be loop invariant, so we can not put it into static fields
int[] seq = new int[1000];
for (int i = 0; i < seq.length; i++) {
seq[i] = i;
}
for (int i = 0; i < 1024; i++) {
int constVal = 10;
Asserts.assertTrue(0 <= seq[i % 5] && seq[i % 5] <= 4);
Asserts.assertTrue(0 <= seq[i % -5] && seq[i % -5] <= 4);
Asserts.assertTrue(0 <= seq[i % constVal] && seq[i % constVal] <= 9);
Asserts.assertTrue(0 <= seq[i % -constVal] && seq[i % -constVal] <= 9);
Asserts.assertTrue(seq[i % 1] == 0);
// will not apply RCE
Asserts.assertTrue(0 <= seq[i % field] && seq[i % field] <= 999);
Asserts.assertTrue(0 <= seq[i % -field] && seq[i % -field] <= 999);
}
}
public static void main(String... args) throws Exception {
for (int i = 0; i < 10_000; i++) {
test1();
}
}
}
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