1 /* 2 * Copyright (c) 2011, 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 org.graalvm.compiler.debug.DebugContext; 28 import org.graalvm.compiler.nodes.ReturnNode; 29 import org.graalvm.compiler.nodes.StructuredGraph; 30 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 31 import org.graalvm.compiler.phases.OptimisticOptimizations; 32 import org.graalvm.compiler.phases.OptimisticOptimizations.Optimization; 33 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 34 import org.graalvm.compiler.phases.tiers.HighTierContext; 35 import org.graalvm.compiler.phases.tiers.PhaseContext; 36 import org.junit.Test; 37 38 public class MergeCanonicalizerTest extends GraalCompilerTest { 39 40 /** 41 * These tests assume all code paths are reachable so disable profile based dead code removal. 42 */ 43 @Override 44 protected HighTierContext getDefaultHighTierContext() { 45 return new HighTierContext(getProviders(), getDefaultGraphBuilderSuite(), OptimisticOptimizations.ALL.remove(Optimization.RemoveNeverExecutedCode)); 46 } 47 48 public static int staticField; 49 50 private int field; 51 52 @Test 53 public void testSplitReturn() { 54 test("testSplitReturnSnippet", 2); 55 testReturnCount("testSplitReturnSnippet", 2); 56 } 57 58 public int testSplitReturnSnippet(int b) { 59 int v; 60 if (b < 0) { 61 staticField = 1; 62 v = 10; 63 } else { 64 staticField = 2; 65 v = 20; 66 } 67 int i = field; 68 i = field + i; 69 return v; 70 } 71 72 private void testReturnCount(String snippet, int returnCount) { 73 StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES); 74 new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders())); 75 new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders())); 76 graph.getDebug().dump(DebugContext.BASIC_LEVEL, graph, "Graph"); 77 assertDeepEquals(returnCount, graph.getNodes(ReturnNode.TYPE).count()); 78 } 79 }