1 /* 2 * Copyright (c) 2016, 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.graalvm.compiler.nodes.StructuredGraph; 28 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 29 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 30 import org.graalvm.compiler.phases.common.ConditionalEliminationPhase; 31 import org.graalvm.compiler.phases.tiers.HighTierContext; 32 import org.junit.Test; 33 34 public class ConditionalEliminationMulTest extends GraalCompilerTest { 35 36 public static void snippet01(int a) { 37 if (a == 3) { 38 if (a * 11 != 33) { 39 shouldBeOptimizedAway(); 40 } 41 } 42 } 43 44 public static void snippet02(int a) { 45 if (a == 0) { 46 if (a * 11 != 0) { 47 shouldBeOptimizedAway(); 48 } 49 } 50 } 51 52 public static void snippet03(int a) { 53 if (a * 0 == 6) { 54 shouldBeOptimizedAway(); 55 } 56 } 57 58 @Test 59 public void testConditionalEliminated01() { 60 assertOptimized("snippet01"); 61 } 62 63 @Test 64 public void testConditionalEliminated02() { 65 assertOptimized("snippet02"); 66 } 67 68 @Test 69 public void testConditionalEliminated03() { 70 assertOptimized("snippet03"); 71 } 72 73 private void assertOptimized(String snippet) { 74 assertOptimizedAway(prepareGraph(snippet)); 75 } 76 77 private StructuredGraph prepareGraph(String snippet) { 78 StructuredGraph graph = parseEager(snippet, AllowAssumptions.NO); 79 HighTierContext context = getDefaultHighTierContext(); 80 new ConditionalEliminationPhase(false).apply(graph, context); 81 CanonicalizerPhase c = new CanonicalizerPhase(); 82 c.apply(graph, context); 83 new ConditionalEliminationPhase(false).apply(graph, context); 84 c.apply(graph, context); 85 return graph; 86 } 87 }