71 lines
2.4 KiB
Java
71 lines
2.4 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8080976
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* @summary Loop variant use in reduction should prevent vectorization
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* @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
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* compiler.loopopts.superword.TestReductionWithLoopVariantUse
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*/
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package compiler.loopopts.superword;
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public class TestReductionWithLoopVariantUse {
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static int m(int[] array) {
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int c = 0;
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for (int i = 0; i < 256; i++) {
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c += array[i];
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array[i] = c;
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}
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return c;
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}
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static public void main(String[] args) {
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int[] array = new int[256];
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int[] array2 = new int[256];
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for (int j = 0; j < 256; j++) {
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array2[j] = j;
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}
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for (int i = 0; i < 20000; i++) {
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System.arraycopy(array2, 0, array, 0, 256);
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int res = m(array);
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boolean success = true;
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int c = 0;
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for (int j = 0; j < 256; j++) {
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c += array2[j];
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if (array[j] != c) {
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System.out.println("Failed for " + j + " : " + array[j] + " != " + c);
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success = false;
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}
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}
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if (c != res) {
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System.out.println("Failed for sum: " + c + " != " + res);
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}
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if (!success) {
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throw new RuntimeException("Test failed");
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}
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}
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}
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}
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