1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
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  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).
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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  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
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  23 
  24 /**
  25  * @test
  26  * @bug 5057225
  27  * @summary Remove useless I2L conversions
  28  * @modules java.base/jdk.internal.misc
  29  * @library /testlibrary
  30  *
  31  * @run main/othervm -Xcomp
  32  *      -XX:CompileCommand=compileonly,compiler.c2.Test5057225::doload
  33  *      compiler.c2.Test5057225
  34  */
  35 
  36 package compiler.c2;
  37 import jdk.test.lib.Utils;
  38 
  39 public class Test5057225 {
  40     static byte[]  ba = new byte[]  { -1 };
  41     static short[] sa = new short[] { -1 };
  42     static int[]   ia = new int[]   { -1 };
  43 
  44     static final long[] BYTE_MASKS = {
  45          0x0FL,
  46          0x7FL,  // 7-bit
  47          0xFFL,
  48     };
  49 
  50     static final long[] SHORT_MASKS = {
  51         0x000FL,
  52         0x007FL,  // 7-bit
  53         0x00FFL,
  54         0x0FFFL,
  55         0x3FFFL,  // 14-bit
  56         0x7FFFL,  // 15-bit
  57         0xFFFFL,
  58     };
  59 
  60     static final long[] INT_MASKS = {
  61         0x0000000FL,
  62         0x0000007FL,  // 7-bit
  63         0x000000FFL,
  64         0x00000FFFL,
  65         0x00003FFFL,  // 14-bit
  66         0x00007FFFL,  // 15-bit
  67         0x0000FFFFL,
  68         0x00FFFFFFL,
  69         0x7FFFFFFFL,  // 31-bit
  70         0xFFFFFFFFL,
  71     };
  72 
  73     public static void main(String[] args) throws Exception {
  74         for (int i = 0; i < BYTE_MASKS.length; i++) {
  75             System.setProperty("value", "" + BYTE_MASKS[i]);
  76             loadAndRunClass(Test5057225.class.getName() + "$loadUB2L");
  77         }
  78 
  79         for (int i = 0; i < SHORT_MASKS.length; i++) {
  80             System.setProperty("value", "" + SHORT_MASKS[i]);
  81             loadAndRunClass(Test5057225.class.getName() + "$loadUS2L");
  82         }
  83 
  84         for (int i = 0; i < INT_MASKS.length; i++) {
  85             System.setProperty("value", "" + INT_MASKS[i]);
  86             loadAndRunClass(Test5057225.class.getName() + "$loadUI2L");
  87         }
  88     }
  89 
  90     static void check(long result, long expected) {
  91         if (result != expected)
  92             throw new InternalError(result + " != " + expected);
  93     }
  94 
  95     static void loadAndRunClass(String classname) throws Exception {
  96         Class cl = Class.forName(classname);
  97         ClassLoader apploader = cl.getClassLoader();
  98         ClassLoader loader
  99                 = Utils.getTestClassPathURLClassLoader(apploader.getParent());
 100         Class c = loader.loadClass(classname);
 101         Runnable r = (Runnable) c.newInstance();
 102         r.run();
 103     }
 104 
 105     public static class loadUB2L implements Runnable {
 106         static final long MASK;
 107         static {
 108             long value = 0;
 109             try {
 110                 value = Long.decode(System.getProperty("value"));
 111             } catch (Throwable e) {}
 112             MASK = value;
 113         }
 114 
 115         public void run() { check(doload(ba), MASK); }
 116         static long doload(byte[] ba) { return ba[0] & MASK; }
 117     }
 118 
 119     public static class loadUS2L implements Runnable {
 120         static final long MASK;
 121         static {
 122             long value = 0;
 123             try {
 124                 value = Long.decode(System.getProperty("value"));
 125             } catch (Throwable e) {}
 126             MASK = value;
 127         }
 128 
 129         public void run() { check(doload(sa), MASK); }
 130         static long doload(short[] sa) { return sa[0] & MASK; }
 131     }
 132 
 133     public static class loadUI2L implements Runnable {
 134         static final long MASK;
 135         static {
 136             long value = 0;
 137             try {
 138                 value = Long.decode(System.getProperty("value"));
 139             } catch (Throwable e) {}
 140             MASK = value;
 141         }
 142 
 143         public void run() { check(doload(ia), MASK); }
 144         static long doload(int[] ia) { return ia[0] & MASK; }
 145     }
 146 }