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annotate test/compiler/codegen/LoadWithMask2.java @ 17506:984401824c5e

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8031743: C2: loadI2L_immI broken for negative memory values Summary: Restrict loadI2L_imm optimizations to positive values of mask Reviewed-by: kvn, dlong
author iveresov
date Tue, 21 Jan 2014 20:05:28 -0800
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17506
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 /*
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25 * @test
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26 * @bug 8031743
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27 * @summary loadI2L_immI broken for negative memory values
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28 * @run main/othervm -server -Xbatch -XX:-TieredCompilation -XX:CompileCommand=compileonly,*.foo* LoadWithMask2
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29 *
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30 */
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31 public class LoadWithMask2 {
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32 static int x;
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33 static long foo1() {
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34 return x & 0xfffffffe;
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35 }
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36 static long foo2() {
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37 return x & 0xff000000;
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38 }
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39 static long foo3() {
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40 return x & 0x8abcdef1;
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41 }
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42
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43 public static void main(String[] args) {
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44 x = -1;
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45 long l = 0;
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46 for (int i = 0; i < 100000; ++i) {
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47 l = foo1() & foo2() & foo3();
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48 }
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49 if (l > 0) {
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50 System.out.println("FAILED");
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51 System.exit(97);
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52 }
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53 System.out.println("PASSED");
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54 }
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55 }