1 /* 2 * Copyright (c) 2011, 2019, 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.debug.DebugContext; 29 import org.graalvm.compiler.debug.DebugDumpScope; 30 import org.graalvm.compiler.nodes.DeoptimizeNode; 31 import org.graalvm.compiler.nodes.StructuredGraph; 32 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 33 import org.graalvm.compiler.nodes.memory.ReadNode; 34 import org.graalvm.compiler.nodes.spi.CoreProviders; 35 import org.graalvm.compiler.nodes.spi.LoweringTool; 36 import org.graalvm.compiler.phases.OptimisticOptimizations; 37 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 38 import org.graalvm.compiler.phases.common.FloatingReadPhase; 39 import org.graalvm.compiler.phases.common.GuardLoweringPhase; 40 import org.graalvm.compiler.phases.common.LoweringPhase; 41 import org.graalvm.compiler.phases.tiers.MidTierContext; 42 import org.junit.Assert; 43 import org.junit.Ignore; 44 import org.junit.Test; 45 46 /** 47 * Tests that the hub access and the null check are folded. 48 */ 49 public class ImplicitNullCheckTest extends GraphScheduleTest { 50 51 public static final class Receiver { 52 53 public int a; 54 } 55 56 public static int test1Snippet(Object o) { 57 if (GraalDirectives.guardingNonNull(o) instanceof Receiver) { 58 return 42; 59 } 60 return 0; 61 } 62 63 @Ignore("temporarily disable until LoadHub lowering is clarified") 64 @Test 65 public void test1() { 66 test("test1Snippet"); 67 } 68 69 @SuppressWarnings("try") 70 private void test(final String snippet) { 71 DebugContext debug = getDebugContext(); 72 try (DebugContext.Scope s = debug.scope("FloatingReadTest", new DebugDumpScope(snippet))) { 73 StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES, debug); 74 CoreProviders context = getProviders(); 75 new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context); 76 new FloatingReadPhase().apply(graph); 77 MidTierContext midTierContext = new MidTierContext(getProviders(), getTargetProvider(), OptimisticOptimizations.ALL, graph.getProfilingInfo()); 78 new GuardLoweringPhase().apply(graph, midTierContext); 79 80 Assert.assertEquals(0, graph.getNodes(DeoptimizeNode.TYPE).count()); 81 Assert.assertTrue(graph.getNodes().filter(ReadNode.class).first().canNullCheck()); 82 83 } catch (Throwable e) { 84 throw debug.handle(e); 85 } 86 } 87 }