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 24 25 package org.graalvm.compiler.core.test; 26 27 import org.graalvm.compiler.api.directives.GraalDirectives; 28 import org.graalvm.compiler.nodes.GuardNode; 29 import org.graalvm.compiler.nodes.StructuredGraph; 30 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 31 import org.graalvm.compiler.nodes.spi.LoweringTool; 32 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 33 import org.graalvm.compiler.phases.common.LoweringPhase; 34 import org.graalvm.compiler.phases.common.ConditionalEliminationPhase; 35 import org.graalvm.compiler.phases.tiers.PhaseContext; 36 import org.junit.Assert; 37 import org.junit.Test; 38 39 /** 40 * This test checks the combined action of 41 * {@link org.graalvm.compiler.phases.common.ConditionalEliminationPhase} and 42 * {@link org.graalvm.compiler.phases.common.LoweringPhase}. The lowering phase needs to introduce 43 * the null checks at the correct places for the dominator conditional elimination phase to pick 44 * them up. 45 */ 46 public class ConditionalEliminationTest10 extends ConditionalEliminationTestBase { 47 48 private static boolean condition1; 49 private static boolean condition2; 50 51 private static class TestClass { 52 int x; 53 } 54 55 @SuppressWarnings("all") 56 public static int testSnippet1(TestClass t) { 57 int result = 0; 58 if (condition1) { 59 GraalDirectives.controlFlowAnchor(); 60 result = t.x; 61 } 62 GraalDirectives.controlFlowAnchor(); 63 return result + t.x; 64 } 65 66 @Test 67 public void test1() { 68 test("testSnippet1", 1); 69 } 70 71 @SuppressWarnings("all") 72 public static int testSnippet2(TestClass t) { 73 int result = 0; 74 if (condition1) { 75 GraalDirectives.controlFlowAnchor(); 76 result = t.x; 77 } else { 78 GraalDirectives.controlFlowAnchor(); 79 result = t.x; 80 } 81 82 if (condition2) { 83 result = t.x; 84 GraalDirectives.controlFlowAnchor(); 85 } 86 87 return result; 88 } 89 90 @Test 91 public void test2() { 92 test("testSnippet2", 1); 93 } 94 95 private void test(String snippet, int guardCount) { 96 StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES); 97 PhaseContext context = new PhaseContext(getProviders()); 98 new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context); 99 new ConditionalEliminationPhase(true).apply(graph, context); 100 Assert.assertEquals(guardCount, graph.getNodes().filter(GuardNode.class).count()); 101 } 102 }