1 /* 2 * Copyright (c) 2009, 2012, 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.jtt.optimize; 24 25 import org.junit.Test; 26 27 import org.graalvm.compiler.jtt.JTTTest; 28 29 /* 30 * Tests value numbering of integer operations. 31 */ 32 public class VN_Loop01 extends JTTTest { 33 34 private static boolean cond1 = true; 35 private static boolean cond2 = true; 36 37 public static int test(int arg) { 38 if (arg == 0) { 39 return test1(arg); 40 } 41 if (arg == 1) { 42 return test2(arg); 43 } 44 if (arg == 2) { 45 return test3(arg); 46 } 47 if (arg == 3) { 48 return test4(arg); 49 } 50 return 0; 51 } 52 53 public static int test1(int x) { 54 int c = 3; 55 int t = x + c; 56 while (cond1) { 57 if (cond2) { 58 int u = x + c; // GVN should recognize u == t 59 return t + u; 60 } 61 } 62 return 3; // GVN should recognize 3 == 3 63 } 64 65 public static int test2(int x) { 66 int c = 3; 67 while (cond1) { 68 int t = x + c; 69 if (cond2) { 70 int u = x + c; // GVN should recognize u == t 71 return t + u; 72 } 73 } 74 return 3; 75 } 76 77 public static int test3(int x) { 78 int c = 3; 79 int t = x + c; 80 while (cond1) { 81 if (cond2) { 82 int u = x + c; // GVN should recognize u == t 83 return t + u; 84 } 85 int u = x + c; // GVN should recognize u == t 86 return t + u; 87 } 88 return 3; // GVN should recognize 3 == 3 89 } 90 91 public static int test4(int x) { 92 int c = 3; 93 int t = x + c; 94 while (cond1) { 95 if (!cond2) { 96 int u = x + c; 97 return t + u; 98 } 99 int u = x + c; 100 return t + u; 101 } 102 return 3; 103 } 104 105 @Test 106 public void run0() throws Throwable { 107 runTest("test", 0); 108 } 109 110 @Test 111 public void run1() throws Throwable { 112 runTest("test", 1); 113 } 114 115 @Test 116 public void run2() throws Throwable { 117 runTest("test", 2); 118 } 119 120 @Test 121 public void run3() throws Throwable { 122 runTest("test", 3); 123 } 124 125 @Test 126 public void run4() throws Throwable { 127 runTest("test", 4); 128 } 129 130 }