| /* |
| * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.core.test; |
| |
| import org.junit.Test; |
| |
| import org.graalvm.compiler.api.directives.GraalDirectives; |
| import org.graalvm.compiler.debug.Debug; |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.nodes.AbstractBeginNode; |
| import org.graalvm.compiler.nodes.BeginNode; |
| import org.graalvm.compiler.nodes.FixedNode; |
| import org.graalvm.compiler.nodes.GuardNode; |
| import org.graalvm.compiler.nodes.LogicNode; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; |
| import org.graalvm.compiler.nodes.java.InstanceOfNode; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.nodes.spi.ValueProxy; |
| import org.graalvm.compiler.phases.common.CanonicalizerPhase; |
| import org.graalvm.compiler.phases.common.ConvertDeoptimizeToGuardPhase; |
| import org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase; |
| import org.graalvm.compiler.phases.common.LoweringPhase; |
| import org.graalvm.compiler.phases.schedule.SchedulePhase; |
| import org.graalvm.compiler.phases.tiers.HighTierContext; |
| |
| public class GuardEliminationCornerCasesTest extends GraalCompilerTest { |
| |
| static class A { |
| |
| } |
| |
| static class B extends A { |
| |
| } |
| |
| static class C extends B { |
| |
| } |
| |
| static class D extends C { |
| |
| } |
| |
| @SuppressWarnings({"static-method", "unused"}) |
| private int testMethod(Object a) { |
| if (a instanceof A) { |
| if (a instanceof C) { |
| if (a instanceof B) { |
| B b = (B) a; |
| if (b instanceof C) { |
| return 1; |
| } else { |
| GraalDirectives.deoptimizeAndInvalidate(); |
| } |
| } |
| } else { |
| GraalDirectives.deoptimizeAndInvalidate(); |
| } |
| } |
| return 0; |
| } |
| |
| @Test |
| public void testFloatingGuards() { |
| HighTierContext context = getDefaultHighTierContext(); |
| StructuredGraph graph = parseEager("testMethod", AllowAssumptions.YES); |
| new ConvertDeoptimizeToGuardPhase().apply(graph, context); |
| CanonicalizerPhase canonicalizer = new CanonicalizerPhase(); |
| new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context); |
| Debug.dump(Debug.BASIC_LOG_LEVEL, graph, "after parsing"); |
| |
| GuardNode myGuardNode = null; |
| for (Node n : graph.getNodes()) { |
| if (n instanceof GuardNode) { |
| GuardNode guardNode = (GuardNode) n; |
| LogicNode condition = guardNode.getCondition(); |
| if (condition instanceof InstanceOfNode) { |
| InstanceOfNode instanceOfNode = (InstanceOfNode) condition; |
| if (instanceOfNode.getValue() instanceof ValueProxy) { |
| myGuardNode = guardNode; |
| break; |
| } |
| } |
| } |
| } |
| |
| AbstractBeginNode myBegin = (AbstractBeginNode) myGuardNode.getAnchor(); |
| AbstractBeginNode prevBegin = BeginNode.prevBegin((FixedNode) myBegin.predecessor()); |
| myGuardNode.setAnchor(prevBegin); |
| |
| Debug.dump(Debug.BASIC_LOG_LEVEL, graph, "after manual modification"); |
| graph.reverseUsageOrder(); |
| new DominatorConditionalEliminationPhase(true).apply(graph, context); |
| new SchedulePhase(SchedulePhase.SchedulingStrategy.EARLIEST).apply(graph); |
| } |
| } |