1 /* 2 * Copyright (c) 2011, 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 package org.graalvm.compiler.core.test; 24 25 import org.graalvm.compiler.debug.DebugContext; 26 import org.graalvm.compiler.nodes.ReturnNode; 27 import org.graalvm.compiler.nodes.StructuredGraph; 28 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 29 import org.graalvm.compiler.phases.OptimisticOptimizations; 30 import org.graalvm.compiler.phases.OptimisticOptimizations.Optimization; 31 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 32 import org.graalvm.compiler.phases.tiers.HighTierContext; 33 import org.graalvm.compiler.phases.tiers.PhaseContext; 34 import org.junit.Test; 35 36 public class MergeCanonicalizerTest extends GraalCompilerTest { 37 38 /** 39 * These tests assume all code paths are reachable so disable profile based dead code removal. 40 */ 41 @Override 42 protected HighTierContext getDefaultHighTierContext() { 43 return new HighTierContext(getProviders(), getDefaultGraphBuilderSuite(), OptimisticOptimizations.ALL.remove(Optimization.RemoveNeverExecutedCode)); 44 } 45 46 public static int staticField; 47 48 private int field; 49 50 @Test 51 public void testSplitReturn() { 52 test("testSplitReturnSnippet", 2); 53 testReturnCount("testSplitReturnSnippet", 2); 54 } 55 56 public int testSplitReturnSnippet(int b) { 57 int v; 58 if (b < 0) { 59 staticField = 1; 60 v = 10; 61 } else { 62 staticField = 2; 63 v = 20; 64 } 65 int i = field; 66 i = field + i; 67 return v; 68 } 69 70 private void testReturnCount(String snippet, int returnCount) { 71 StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES); 72 new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders())); 73 new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders())); 74 graph.getDebug().dump(DebugContext.BASIC_LEVEL, graph, "Graph"); 75 assertDeepEquals(returnCount, graph.getNodes(ReturnNode.TYPE).count()); 76 } 77 }