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view test/compiler/6661247/Test.java @ 10227:3ecc6b9940de
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author | sla |
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date | Tue, 07 May 2013 01:25:21 +0200 |
parents | c18cbe5936b8 |
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/* * Copyright (c) 1997, 2008, 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 6661247 * @summary Internal bug in 32-bit HotSpot optimizer while bit manipulations */ import java.util.Random; import java.nio.*; // This isn't a completely reliable test for 6661247 since the results // depend on what the local schedule looks like but it does reproduce // the issue in current builds. public class Test { public static void test(boolean[] src, int srcPos, LongBuffer dest, long destPos, int count) { int countStart = (destPos & 63) == 0 ? 0 : 64 - (int)(destPos & 63); if (countStart > count) countStart = count; for (int srcPosMax = srcPos + countStart; srcPos < srcPosMax; srcPos++, destPos++) { if (src[srcPos]) dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) | 1L << (destPos & 63)); else dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) & ~(1L << (destPos & 63))); } count -= countStart; int cnt = count >>> 6; for (int k = (int)(destPos >>> 6), kMax = k + cnt; k < kMax; k++) { int low = (src[srcPos] ? 1 : 0) | (src[srcPos + 1] ? 1 << 1 : 0) | (src[srcPos + 2] ? 1 << 2 : 0) | (src[srcPos + 3] ? 1 << 3 : 0) | (src[srcPos + 4] ? 1 << 4 : 0) | (src[srcPos + 5] ? 1 << 5 : 0) | (src[srcPos + 6] ? 1 << 6 : 0) | (src[srcPos + 7] ? 1 << 7 : 0) | (src[srcPos + 8] ? 1 << 8 : 0) | (src[srcPos + 9] ? 1 << 9 : 0) | (src[srcPos + 10] ? 1 << 10 : 0) | (src[srcPos + 11] ? 1 << 11 : 0) | (src[srcPos + 12] ? 1 << 12 : 0) | (src[srcPos + 13] ? 1 << 13 : 0) | (src[srcPos + 14] ? 1 << 14 : 0) | (src[srcPos + 15] ? 1 << 15 : 0) | (src[srcPos + 16] ? 1 << 16 : 0) | (src[srcPos + 17] ? 1 << 17 : 0) | (src[srcPos + 18] ? 1 << 18 : 0) | (src[srcPos + 19] ? 1 << 19 : 0) | (src[srcPos + 20] ? 1 << 20 : 0) | (src[srcPos + 21] ? 1 << 21 : 0) | (src[srcPos + 22] ? 1 << 22 : 0) | (src[srcPos + 23] ? 1 << 23 : 0) | (src[srcPos + 24] ? 1 << 24 : 0) | (src[srcPos + 25] ? 1 << 25 : 0) | (src[srcPos + 26] ? 1 << 26 : 0) | (src[srcPos + 27] ? 1 << 27 : 0) | (src[srcPos + 28] ? 1 << 28 : 0) | (src[srcPos + 29] ? 1 << 29 : 0) | (src[srcPos + 30] ? 1 << 30 : 0) | (src[srcPos + 31] ? 1 << 31 : 0) ; srcPos += 32; int high = (src[srcPos] ? 1 : 0) // PROBLEM! | (src[srcPos + 1] ? 1 << 1 : 0) | (src[srcPos + 2] ? 1 << 2 : 0) | (src[srcPos + 3] ? 1 << 3 : 0) | (src[srcPos + 4] ? 1 << 4 : 0) | (src[srcPos + 5] ? 1 << 5 : 0) | (src[srcPos + 6] ? 1 << 6 : 0) | (src[srcPos + 7] ? 1 << 7 : 0) | (src[srcPos + 8] ? 1 << 8 : 0) | (src[srcPos + 9] ? 1 << 9 : 0) | (src[srcPos + 10] ? 1 << 10 : 0) | (src[srcPos + 11] ? 1 << 11 : 0) | (src[srcPos + 12] ? 1 << 12 : 0) | (src[srcPos + 13] ? 1 << 13 : 0) | (src[srcPos + 14] ? 1 << 14 : 0) | (src[srcPos + 15] ? 1 << 15 : 0) | (src[srcPos + 16] ? 1 << 16 : 0) | (src[srcPos + 17] ? 1 << 17 : 0) | (src[srcPos + 18] ? 1 << 18 : 0) | (src[srcPos + 19] ? 1 << 19 : 0) | (src[srcPos + 20] ? 1 << 20 : 0) | (src[srcPos + 21] ? 1 << 21 : 0) | (src[srcPos + 22] ? 1 << 22 : 0) | (src[srcPos + 23] ? 1 << 23 : 0) | (src[srcPos + 24] ? 1 << 24 : 0) | (src[srcPos + 25] ? 1 << 25 : 0) | (src[srcPos + 26] ? 1 << 26 : 0) | (src[srcPos + 27] ? 1 << 27 : 0) | (src[srcPos + 28] ? 1 << 28 : 0) | (src[srcPos + 29] ? 1 << 29 : 0) | (src[srcPos + 30] ? 1 << 30 : 0) | (src[srcPos + 31] ? 1 << 31 : 0) ; srcPos += 32; dest.put(k, ((long)low & 0xFFFFFFFFL) | (((long)high) << 32)); destPos += 64; } int countFinish = count & 63; for (int srcPosMax = srcPos + countFinish; srcPos < srcPosMax; srcPos++, destPos++) { if (src[srcPos]) dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) | 1L << (destPos & 63)); else dest.put((int)(destPos >>> 6), dest.get((int)(destPos >>> 6)) & ~(1L << (destPos & 63))); } } public static void main(String[] args) { Random r = new Random(); int entries = 1000; boolean[] src = new boolean[entries * 64]; long[] dest = new long[entries]; long[] result = new long[entries]; for (int c = 0; c < 2000; c++) { for (int i = 0; i < entries; i++) { long l = r.nextLong(); for (int bit = 0; bit < 64; bit++) { src[i * 64 + bit] = (l & (1L << bit)) != 0; } dest[i] = 0; result[i] = l; } test(src, 0, LongBuffer.wrap(dest, 0, dest.length), 0, src.length); for (int i = 0; i < entries; i++) { if (dest[i] != result[i]) { throw new InternalError(i + ": " + Long.toHexString(dest[i]) + " != " + Long.toHexString(result[i])); } } } } }