| /* |
| * Copyright (c) 2011, 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.graalvm.compiler.debug.DebugContext; |
| import org.graalvm.compiler.nodes.GuardNode; |
| 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.phases.common.CanonicalizerPhase; |
| import org.graalvm.compiler.phases.common.ConditionalEliminationPhase; |
| import org.graalvm.compiler.phases.common.FloatingReadPhase; |
| import org.graalvm.compiler.phases.common.LoweringPhase; |
| import org.graalvm.compiler.phases.tiers.PhaseContext; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| /** |
| * Collection of tests for {@link org.graalvm.compiler.phases.common.ConditionalEliminationPhase} |
| * including those that triggered bugs in this phase. |
| */ |
| public class ConditionalEliminationTest2 extends ConditionalEliminationTestBase { |
| |
| public static Object field; |
| |
| static class Entry { |
| |
| final String name; |
| |
| Entry(String name) { |
| this.name = name; |
| } |
| } |
| |
| static class EntryWithNext extends Entry { |
| |
| EntryWithNext(String name, Entry next) { |
| super(name); |
| this.next = next; |
| } |
| |
| final Entry next; |
| } |
| |
| static class A { |
| } |
| |
| static class B extends A { |
| } |
| |
| static class C extends A { |
| } |
| |
| public static Entry search(Entry start, String name, Entry alternative) { |
| Entry current = start; |
| do { |
| while (current instanceof EntryWithNext) { |
| if (name != null && current.name == name) { |
| current = null; |
| } else { |
| Entry next = ((EntryWithNext) current).next; |
| current = next; |
| } |
| } |
| |
| if (current != null) { |
| if (current.name.equals(name)) { |
| return current; |
| } |
| } |
| if (current == alternative) { |
| return null; |
| } |
| current = alternative; |
| |
| } while (true); |
| } |
| |
| public static int testRedundantComparesSnippet(int[] array) { |
| if (array == null) { |
| return 0; |
| } |
| return array[0] + array[1] + array[2] + array[3]; |
| } |
| |
| @Test |
| public void testRedundantCompares() { |
| StructuredGraph graph = parseEager("testRedundantComparesSnippet", AllowAssumptions.YES); |
| CanonicalizerPhase canonicalizer = new CanonicalizerPhase(); |
| PhaseContext context = new PhaseContext(getProviders()); |
| |
| new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context); |
| canonicalizer.apply(graph, context); |
| new FloatingReadPhase().apply(graph); |
| new ConditionalEliminationPhase(true).apply(graph, context); |
| canonicalizer.apply(graph, context); |
| |
| assertDeepEquals(1, graph.getNodes().filter(GuardNode.class).count()); |
| } |
| |
| public static String testInstanceOfCheckCastSnippet(Object e) { |
| if (e instanceof Entry) { |
| return ((Entry) e).name; |
| } |
| return null; |
| } |
| |
| @Test |
| public void testInstanceOfCheckCastLowered() { |
| StructuredGraph graph = parseEager("testInstanceOfCheckCastSnippet", AllowAssumptions.YES); |
| |
| CanonicalizerPhase canonicalizer = new CanonicalizerPhase(); |
| PhaseContext context = new PhaseContext(getProviders()); |
| |
| new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context); |
| canonicalizer.apply(graph, context); |
| new ConditionalEliminationPhase(true).apply(graph, context); |
| canonicalizer.apply(graph, context); |
| |
| assertDeepEquals(0, graph.getNodes().filter(GuardNode.class).count()); |
| } |
| |
| private void checkInstanceOfCount(String methodName, int count) { |
| StructuredGraph graph = parseEager(methodName, AllowAssumptions.YES); |
| |
| CanonicalizerPhase canonicalizer = new CanonicalizerPhase(); |
| PhaseContext context = new PhaseContext(getProviders()); |
| |
| canonicalizer.apply(graph, context); |
| new ConditionalEliminationPhase(true).apply(graph, context); |
| getDebugContext().dump(DebugContext.BASIC_LEVEL, graph, "After ConditionalEliminationPhase"); |
| canonicalizer.apply(graph, context); |
| |
| Assert.assertEquals(count, graph.getNodes().filter(InstanceOfNode.class).count()); |
| } |
| |
| public static A testRedundantInstanceOfClass(Object value) { |
| if (value != null && value.getClass() == A.class) { |
| return (A) value; |
| } |
| return null; |
| } |
| |
| public static Object testRedundantInstanceOfArray(Object value) { |
| if (value != null && value.getClass() == Object[].class) { |
| return ((Object[]) value)[0]; |
| } |
| return null; |
| } |
| |
| public static boolean testRedundantInstanceOfPrecise(Object value) { |
| if (value != null && value.getClass() == A.class) { |
| return value instanceof A; |
| } |
| return false; |
| } |
| |
| public static boolean testRedundantInstanceOfImplicitNonNull(Object value) { |
| if (value.getClass() == A.class) { |
| return value instanceof A; |
| } |
| return false; |
| } |
| |
| @Test |
| public void testRedundantInstanceOf() { |
| checkInstanceOfCount("testRedundantInstanceOfClass", 1); |
| checkInstanceOfCount("testRedundantInstanceOfArray", 1); |
| checkInstanceOfCount("testRedundantInstanceOfPrecise", 1); |
| checkInstanceOfCount("testRedundantInstanceOfImplicitNonNull", 1); |
| } |
| |
| public static boolean testNonRedundantInstanceOfClass(Object value) { |
| if (value instanceof A) { |
| return (value != null && value.getClass() == A.class); |
| } |
| return false; |
| } |
| |
| public static boolean testNonRedundantInstanceOfArray(Object value) { |
| if (value instanceof Object[]) { |
| return (value != null && value.getClass() == Object[].class); |
| } |
| return false; |
| } |
| |
| public static boolean testNonRedundantInstanceOfImplicitNonNull(Object value) { |
| if (value instanceof Object[]) { |
| return value.getClass() == Object[].class; |
| } |
| return false; |
| } |
| |
| @Test |
| public void testNonRedundantInstanceOf() { |
| checkInstanceOfCount("testNonRedundantInstanceOfClass", 2); |
| checkInstanceOfCount("testNonRedundantInstanceOfArray", 2); |
| checkInstanceOfCount("testNonRedundantInstanceOfImplicitNonNull", 2); |
| } |
| } |