1 /*
   2  * Copyright (c) 2016, 2018, 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 package org.graalvm.compiler.core.test;
  26 
  27 import org.junit.Test;
  28 
  29 /**
  30  * Sometimes it's possible to emit a smaller read from a larger memory location instead reading the
  31  * whole thing and truncating it. Make sure it returns the right value.
  32  */
  33 public class NarrowingReadTest extends GraalCompilerTest {
  34 
  35     public byte testNarrowReadSnippetByte(Long l) {
  36         return (byte) l.longValue();
  37     }
  38 
  39     @Test
  40     public void testNarrowReadByte() {
  41         test("testNarrowReadSnippetByte", Long.valueOf(Byte.MAX_VALUE));
  42     }
  43 
  44     public short testNarrowReadSnippetShort(Long l) {
  45         return (short) l.longValue();
  46     }
  47 
  48     @Test
  49     public void testNarrowReadShort() {
  50         test("testNarrowReadSnippetShort", Long.valueOf(Short.MAX_VALUE));
  51     }
  52 
  53     public int testNarrowReadSnippetInt(Long l) {
  54         return (int) l.longValue();
  55     }
  56 
  57     @Test
  58     public void testNarrowReadInt() {
  59         test("testNarrowReadSnippetInt", Long.valueOf(Integer.MAX_VALUE));
  60     }
  61 
  62     public long testNarrowReadSnippetIntToLong(Long l) {
  63         return (int) l.longValue();
  64     }
  65 
  66     @Test
  67     public void testNarrowReadIntToLong() {
  68         test("testNarrowReadSnippetIntToLong", Long.valueOf(Integer.MAX_VALUE));
  69     }
  70 }