| /* |
| * 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.Assert; |
| import org.junit.Test; |
| |
| import org.graalvm.compiler.api.directives.GraalDirectives; |
| import org.graalvm.compiler.nodes.GuardNode; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.phases.common.CanonicalizerPhase; |
| import org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase; |
| import org.graalvm.compiler.phases.common.LoweringPhase; |
| import org.graalvm.compiler.phases.tiers.PhaseContext; |
| |
| /** |
| * This test checks the combined action of |
| * {@link org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase} and |
| * {@link org.graalvm.compiler.phases.common.LoweringPhase}. The lowering phase needs to introduce |
| * the null checks at the correct places for the dominator conditional elimination phase to pick |
| * them up. |
| */ |
| public class ConditionalEliminationTest10 extends ConditionalEliminationTestBase { |
| |
| private static class TestClass { |
| int x; |
| } |
| |
| @SuppressWarnings("all") |
| public static int testSnippet(int a, TestClass t) { |
| int result = 0; |
| if (a == 0) { |
| GraalDirectives.controlFlowAnchor(); |
| result = t.x; |
| } |
| GraalDirectives.controlFlowAnchor(); |
| return result + t.x; |
| } |
| |
| @Test |
| public void test1() { |
| StructuredGraph graph = parseEager("testSnippet", AllowAssumptions.YES); |
| PhaseContext context = new PhaseContext(getProviders()); |
| new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context); |
| Assert.assertEquals(2, graph.getNodes().filter(GuardNode.class).count()); |
| new DominatorConditionalEliminationPhase(true).apply(graph, context); |
| Assert.assertEquals(1, graph.getNodes().filter(GuardNode.class).count()); |
| } |
| } |