1 /*
   2  * Copyright (c) 2011, 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 package org.graalvm.compiler.core.test;
  24 
  25 import org.junit.Test;
  26 
  27 import org.graalvm.compiler.debug.Debug;
  28 import org.graalvm.compiler.nodes.StructuredGraph;
  29 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
  30 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
  31 import org.graalvm.compiler.phases.tiers.PhaseContext;
  32 
  33 /**
  34  * In the following tests, the scalar type system of the compiler should be complete enough to see
  35  * the relation between the different conditions.
  36  */
  37 public class ScalarTypeSystemTest extends GraalCompilerTest {
  38 
  39     public static int referenceSnippet1(int a) {
  40         if (a > 0) {
  41             return 1;
  42         } else {
  43             return 2;
  44         }
  45     }
  46 
  47     @Test(expected = AssertionError.class)
  48     public void test1() {
  49         test("test1Snippet", "referenceSnippet1");
  50     }
  51 
  52     public static int test1Snippet(int a) {
  53         if (a > 0) {
  54             if (a > -1) {
  55                 return 1;
  56             } else {
  57                 return 3;
  58             }
  59         } else {
  60             return 2;
  61         }
  62     }
  63 
  64     @Test(expected = AssertionError.class)
  65     public void test2() {
  66         test("test2Snippet", "referenceSnippet1");
  67     }
  68 
  69     public static int test2Snippet(int a) {
  70         if (a > 0) {
  71             if (a == -15) {
  72                 return 3;
  73             } else {
  74                 return 1;
  75             }
  76         } else {
  77             return 2;
  78         }
  79     }
  80 
  81     @Test(expected = AssertionError.class)
  82     public void test3() {
  83         test("test3Snippet", "referenceSnippet2");
  84     }
  85 
  86     public static int referenceSnippet2(int a, int b) {
  87         if (a > b) {
  88             return 1;
  89         } else {
  90             return 2;
  91         }
  92     }
  93 
  94     public static int test3Snippet(int a, int b) {
  95         if (a > b) {
  96             if (a == b) {
  97                 return 3;
  98             } else {
  99                 return 1;
 100             }
 101         } else {
 102             return 2;
 103         }
 104     }
 105 
 106     public static int referenceSnippet3(int a, int b) {
 107         if (a == b) {
 108             return 1;
 109         } else {
 110             return 2;
 111         }
 112     }
 113 
 114     @Test(expected = AssertionError.class)
 115     public void test6() {
 116         test("test6Snippet", "referenceSnippet3");
 117     }
 118 
 119     public static int test6Snippet(int a, int b) {
 120         if (a == b) {
 121             if (a == b + 1) {
 122                 return 3;
 123             } else {
 124                 return 1;
 125             }
 126         } else {
 127             return 2;
 128         }
 129     }
 130 
 131     private void test(final String snippet, final String referenceSnippet) {
 132         // No debug scope to reduce console noise for @Test(expected = ...) tests
 133         StructuredGraph graph = parseEager(snippet, AllowAssumptions.NO);
 134         Debug.dump(Debug.BASIC_LOG_LEVEL, graph, "Graph");
 135         PhaseContext context = new PhaseContext(getProviders());
 136         new CanonicalizerPhase().apply(graph, context);
 137         StructuredGraph referenceGraph = parseEager(referenceSnippet, AllowAssumptions.NO);
 138         assertEquals(referenceGraph, graph);
 139     }
 140 }