1 /* 2 * Copyright (c) 2016, 2018, 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 static org.graalvm.compiler.graph.test.matchers.NodeIterableIsEmpty.isEmpty; 28 import static org.junit.Assert.assertThat; 29 30 import org.graalvm.compiler.graph.iterators.NodeIterable; 31 import org.graalvm.compiler.nodes.StructuredGraph; 32 import org.graalvm.compiler.nodes.java.NewArrayNode; 33 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 34 import org.graalvm.compiler.phases.tiers.PhaseContext; 35 import org.junit.Test; 36 37 public class UnusedArray extends GraalCompilerTest { 38 @SuppressWarnings("unused") 39 public void smallArray() { 40 byte[] array = new byte[3]; 41 } 42 43 @SuppressWarnings("unused") 44 public void largeArray() { 45 byte[] array = new byte[10 * 1024 * 1024]; 46 } 47 48 @SuppressWarnings("unused") 49 public void unknownArray(int l) { 50 byte[] array = new byte[l]; 51 } 52 53 @Test 54 public void testSmall() { 55 test("smallArray"); 56 } 57 58 @Test 59 public void testLarge() { 60 test("largeArray"); 61 } 62 63 @Test 64 public void testUnknown() { 65 test("unknownArray"); 66 } 67 68 public void test(String method) { 69 StructuredGraph graph = parseEager(method, StructuredGraph.AllowAssumptions.YES); 70 new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders())); 71 NodeIterable<NewArrayNode> newArrayNodes = graph.getNodes().filter(NewArrayNode.class); 72 assertThat(newArrayNodes, isEmpty()); 73 } 74 }