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/*
* Copyright (c) 2015, 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 8080976
* @summary Loop variant use in reduction should prevent vectorization
* @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
* compiler.loopopts.superword.TestReductionWithLoopVariantUse
*/
package compiler.loopopts.superword;
public class TestReductionWithLoopVariantUse {
static int m(int[] array) {
int c = 0;
for (int i = 0; i < 256; i++) {
c += array[i];
array[i] = c;
}
return c;
}
static public void main(String[] args) {
int[] array = new int[256];
int[] array2 = new int[256];
for (int j = 0; j < 256; j++) {
array2[j] = j;
}
for (int i = 0; i < 20000; i++) {
System.arraycopy(array2, 0, array, 0, 256);
int res = m(array);
boolean success = true;
int c = 0;
for (int j = 0; j < 256; j++) {
c += array2[j];
if (array[j] != c) {
System.out.println("Failed for " + j + " : " + array[j] + " != " + c);
success = false;
}
}
if (c != res) {
System.out.println("Failed for sum: " + c + " != " + res);
}
if (!success) {
throw new RuntimeException("Test failed");
}
}
}
}
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