163 lines
6.9 KiB
Java
163 lines
6.9 KiB
Java
/*
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* Copyright (c) 1997, 2020, 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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* @key randomness
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* @bug 6661247
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* @summary Internal bug in 32-bit HotSpot optimizer while bit manipulations
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*
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* @library /test/lib
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* @run main compiler.c2.Test6661247
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*/
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package compiler.c2;
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import java.nio.LongBuffer;
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import java.util.Random;
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import jdk.test.lib.Utils;
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// This isn't a completely reliable test for 6661247 since the results
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// depend on what the local schedule looks like but it does reproduce
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// the issue in current builds.
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public class Test6661247 {
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public static void test(boolean[] src, int srcPos, LongBuffer dest, long destPos, int count) {
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int countStart = (destPos & 63) == 0 ? 0 : 64 - (int)(destPos & 63);
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if (countStart > count)
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countStart = count;
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for (int srcPosMax = srcPos + countStart; srcPos < srcPosMax; srcPos++, destPos++) {
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if (src[srcPos])
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dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) | 1L << (destPos & 63));
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else
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dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) & ~(1L << (destPos & 63)));
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}
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count -= countStart;
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int cnt = count >>> 6;
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for (int k = (int)(destPos >>> 6), kMax = k + cnt; k < kMax; k++) {
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int low = (src[srcPos] ? 1 : 0)
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| (src[srcPos + 1] ? 1 << 1 : 0)
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| (src[srcPos + 2] ? 1 << 2 : 0)
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| (src[srcPos + 3] ? 1 << 3 : 0)
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| (src[srcPos + 4] ? 1 << 4 : 0)
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| (src[srcPos + 5] ? 1 << 5 : 0)
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| (src[srcPos + 6] ? 1 << 6 : 0)
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| (src[srcPos + 7] ? 1 << 7 : 0)
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| (src[srcPos + 8] ? 1 << 8 : 0)
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| (src[srcPos + 9] ? 1 << 9 : 0)
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| (src[srcPos + 10] ? 1 << 10 : 0)
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| (src[srcPos + 11] ? 1 << 11 : 0)
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| (src[srcPos + 12] ? 1 << 12 : 0)
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| (src[srcPos + 13] ? 1 << 13 : 0)
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| (src[srcPos + 14] ? 1 << 14 : 0)
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| (src[srcPos + 15] ? 1 << 15 : 0)
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| (src[srcPos + 16] ? 1 << 16 : 0)
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| (src[srcPos + 17] ? 1 << 17 : 0)
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| (src[srcPos + 18] ? 1 << 18 : 0)
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| (src[srcPos + 19] ? 1 << 19 : 0)
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| (src[srcPos + 20] ? 1 << 20 : 0)
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| (src[srcPos + 21] ? 1 << 21 : 0)
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| (src[srcPos + 22] ? 1 << 22 : 0)
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| (src[srcPos + 23] ? 1 << 23 : 0)
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| (src[srcPos + 24] ? 1 << 24 : 0)
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| (src[srcPos + 25] ? 1 << 25 : 0)
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| (src[srcPos + 26] ? 1 << 26 : 0)
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| (src[srcPos + 27] ? 1 << 27 : 0)
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| (src[srcPos + 28] ? 1 << 28 : 0)
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| (src[srcPos + 29] ? 1 << 29 : 0)
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| (src[srcPos + 30] ? 1 << 30 : 0)
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| (src[srcPos + 31] ? 1 << 31 : 0)
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;
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srcPos += 32;
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int high = (src[srcPos] ? 1 : 0) // PROBLEM!
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| (src[srcPos + 1] ? 1 << 1 : 0)
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| (src[srcPos + 2] ? 1 << 2 : 0)
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| (src[srcPos + 3] ? 1 << 3 : 0)
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| (src[srcPos + 4] ? 1 << 4 : 0)
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| (src[srcPos + 5] ? 1 << 5 : 0)
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| (src[srcPos + 6] ? 1 << 6 : 0)
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| (src[srcPos + 7] ? 1 << 7 : 0)
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| (src[srcPos + 8] ? 1 << 8 : 0)
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| (src[srcPos + 9] ? 1 << 9 : 0)
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| (src[srcPos + 10] ? 1 << 10 : 0)
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| (src[srcPos + 11] ? 1 << 11 : 0)
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| (src[srcPos + 12] ? 1 << 12 : 0)
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| (src[srcPos + 13] ? 1 << 13 : 0)
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| (src[srcPos + 14] ? 1 << 14 : 0)
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| (src[srcPos + 15] ? 1 << 15 : 0)
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| (src[srcPos + 16] ? 1 << 16 : 0)
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| (src[srcPos + 17] ? 1 << 17 : 0)
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| (src[srcPos + 18] ? 1 << 18 : 0)
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| (src[srcPos + 19] ? 1 << 19 : 0)
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| (src[srcPos + 20] ? 1 << 20 : 0)
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| (src[srcPos + 21] ? 1 << 21 : 0)
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| (src[srcPos + 22] ? 1 << 22 : 0)
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| (src[srcPos + 23] ? 1 << 23 : 0)
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| (src[srcPos + 24] ? 1 << 24 : 0)
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| (src[srcPos + 25] ? 1 << 25 : 0)
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| (src[srcPos + 26] ? 1 << 26 : 0)
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| (src[srcPos + 27] ? 1 << 27 : 0)
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| (src[srcPos + 28] ? 1 << 28 : 0)
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| (src[srcPos + 29] ? 1 << 29 : 0)
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| (src[srcPos + 30] ? 1 << 30 : 0)
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| (src[srcPos + 31] ? 1 << 31 : 0)
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;
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srcPos += 32;
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dest.put(k, ((long)low & 0xFFFFFFFFL) | (((long)high) << 32));
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destPos += 64;
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}
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int countFinish = count & 63;
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for (int srcPosMax = srcPos + countFinish; srcPos < srcPosMax; srcPos++, destPos++) {
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if (src[srcPos])
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dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) | 1L << (destPos & 63));
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else
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dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) & ~(1L << (destPos & 63)));
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}
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}
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public static void main(String[] args) {
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Random r = Utils.getRandomInstance();
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int entries = 1000;
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boolean[] src = new boolean[entries * 64];
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long[] dest = new long[entries];
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long[] result = new long[entries];
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for (int c = 0; c < 2000; c++) {
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for (int i = 0; i < entries; i++) {
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long l = r.nextLong();
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for (int bit = 0; bit < 64; bit++) {
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src[i * 64 + bit] = (l & (1L << bit)) != 0;
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}
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dest[i] = 0;
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result[i] = l;
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}
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test(src, 0, LongBuffer.wrap(dest, 0, dest.length), 0, src.length);
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for (int i = 0; i < entries; i++) {
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if (dest[i] != result[i]) {
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throw new InternalError(i + ": " + Long.toHexString(dest[i]) + " != " + Long.toHexString(result[i]));
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}
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}
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}
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}
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}
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