1 /*
   2  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @bug 5057225
  27  * @summary Remove useless I2L conversions
  28  *
  29  * @run main/othervm -Xcomp -XX:CompileOnly=Test5057225.doload Test5057225
  30  */
  31 
  32 import java.net.URLClassLoader;
  33 
  34 public class Test5057225 {
  35     static byte[]  ba = new byte[]  { -1 };
  36     static short[] sa = new short[] { -1 };
  37     static int[]   ia = new int[]   { -1 };
  38 
  39     static final long[] BYTE_MASKS = {
  40          0x0FL,
  41          0x7FL,  // 7-bit
  42          0xFFL,
  43     };
  44 
  45     static final long[] SHORT_MASKS = {
  46         0x000FL,
  47         0x007FL,  // 7-bit
  48         0x00FFL,
  49         0x0FFFL,
  50         0x3FFFL,  // 14-bit
  51         0x7FFFL,  // 15-bit
  52         0xFFFFL,
  53     };
  54 
  55     static final long[] INT_MASKS = {
  56         0x0000000FL,
  57         0x0000007FL,  // 7-bit
  58         0x000000FFL,
  59         0x00000FFFL,
  60         0x00003FFFL,  // 14-bit
  61         0x00007FFFL,  // 15-bit
  62         0x0000FFFFL,
  63         0x00FFFFFFL,
  64         0x7FFFFFFFL,  // 31-bit
  65         0xFFFFFFFFL,
  66     };
  67 
  68     public static void main(String[] args) throws Exception {
  69         for (int i = 0; i < BYTE_MASKS.length; i++) {
  70             System.setProperty("value", "" + BYTE_MASKS[i]);
  71             loadAndRunClass("Test5057225$loadUB2L");
  72         }
  73 
  74         for (int i = 0; i < SHORT_MASKS.length; i++) {
  75             System.setProperty("value", "" + SHORT_MASKS[i]);
  76             loadAndRunClass("Test5057225$loadUS2L");
  77         }
  78 
  79         for (int i = 0; i < INT_MASKS.length; i++) {
  80             System.setProperty("value", "" + INT_MASKS[i]);
  81             loadAndRunClass("Test5057225$loadUI2L");
  82         }
  83     }
  84 
  85     static void check(long result, long expected) {
  86         if (result != expected)
  87             throw new InternalError(result + " != " + expected);
  88     }
  89 
  90     static void loadAndRunClass(String classname) throws Exception {
  91         Class cl = Class.forName(classname);
  92         URLClassLoader apploader = (URLClassLoader) cl.getClassLoader();
  93         ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent());
  94         Class c = loader.loadClass(classname);
  95         Runnable r = (Runnable) c.newInstance();
  96         r.run();
  97     }
  98 
  99     public static class loadUB2L implements Runnable {
 100         static final long MASK;
 101         static {
 102             long value = 0;
 103             try {
 104                 value = Long.decode(System.getProperty("value"));
 105             } catch (Throwable e) {}
 106             MASK = value;
 107         }
 108 
 109         public void run() { check(doload(ba), MASK); }
 110         static long doload(byte[] ba) { return ba[0] & MASK; }
 111     }
 112 
 113     public static class loadUS2L implements Runnable {
 114         static final long MASK;
 115         static {
 116             long value = 0;
 117             try {
 118                 value = Long.decode(System.getProperty("value"));
 119             } catch (Throwable e) {}
 120             MASK = value;
 121         }
 122 
 123         public void run() { check(doload(sa), MASK); }
 124         static long doload(short[] sa) { return sa[0] & MASK; }
 125     }
 126 
 127     public static class loadUI2L implements Runnable {
 128         static final long MASK;
 129         static {
 130             long value = 0;
 131             try {
 132                 value = Long.decode(System.getProperty("value"));
 133             } catch (Throwable e) {}
 134             MASK = value;
 135         }
 136 
 137         public void run() { check(doload(ia), MASK); }
 138         static long doload(int[] ia) { return ia[0] & MASK; }
 139     }
 140 }