1 /* 2 * Copyright (c) 2015, 2015, 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.api.directives.GraalDirectives; 28 29 /** 30 * Collection of tests for 31 * {@link org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase} including those 32 * that triggered bugs in this phase. 33 */ 34 public class ConditionalEliminationTest1 extends ConditionalEliminationTestBase { 35 36 private static final String REFERENCE_SNIPPET = "referenceSnippet"; 37 38 @SuppressWarnings("all") 39 public static int referenceSnippet(int a) { 40 if (a == 0) { 41 return 1; 42 } 43 return 0; 44 } 45 46 @Test 47 public void test1() { 48 testConditionalElimination("test1Snippet", REFERENCE_SNIPPET); 49 } 50 51 @SuppressWarnings("all") 52 public static int test1Snippet(int a) { 53 if (a == 0) { 54 if (a == 5) { 55 return 100; 56 } 57 if (a > 100) { 58 if (a == 0) { 59 return 200; 60 } 61 } 62 if (a != 2) { 63 return 1; 64 } 65 } 66 return 0; 67 } 68 69 @Test 70 public void test2() { 71 testConditionalElimination("test2Snippet", REFERENCE_SNIPPET); 72 } 73 74 @SuppressWarnings("all") 75 public static int test2Snippet(int a) { 76 if (a == 0) { 77 if (a > 100) { 78 if (a == 0) { 79 return 200; 80 } 81 } 82 if (a != 2) { 83 return 1; 84 } 85 } 86 return 0; 87 } 88 89 @Test 90 public void test3() { 91 testConditionalElimination("test3Snippet", REFERENCE_SNIPPET); 92 } 93 94 @SuppressWarnings("all") 95 public static int test3Snippet(int a) { 96 if (a == 0) { 97 if (a < 1) { 98 if (a < 2) { 99 if (a < 3) { 100 if (a > -1) { 101 if (a > -2) { 102 if (a > -3) { 103 if (a == 1) { 104 return 42; 105 } else { 106 return 1; 107 } 108 } 109 } 110 } 111 } 112 } 113 } 114 } 115 return 0; 116 } 117 118 @SuppressWarnings("all") 119 public static int test4Snippet(int a, int b) { 120 if (b < 1) { 121 GraalDirectives.controlFlowAnchor(); 122 if (b < 0) { 123 return 1; 124 } 125 } 126 return 0; 127 } 128 129 @Test 130 public void test4() { 131 testConditionalElimination("test4Snippet", "test4Snippet"); 132 } 133 134 @SuppressWarnings("all") 135 public static int test5Snippet(int a, int b) { 136 if ((b & 3) == 0) { 137 GraalDirectives.controlFlowAnchor(); 138 if ((b & 7) == 0) { 139 GraalDirectives.controlFlowAnchor(); 140 return 1; 141 } 142 } else { 143 GraalDirectives.controlFlowAnchor(); 144 if ((b & 1) == 0) { 145 GraalDirectives.controlFlowAnchor(); 146 return 2; 147 } 148 } 149 return 0; 150 } 151 152 @Test 153 public void test5() { 154 testConditionalElimination("test5Snippet", "test5Snippet"); 155 } 156 }