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.StructuredGraph; 29 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 30 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 31 import org.graalvm.compiler.phases.tiers.PhaseContext; 32 import org.junit.Test; 33 34 public class StraighteningTest extends GraalCompilerTest { 35 36 private static final String REFERENCE_SNIPPET = "ref"; 37 38 public static boolean ref(int a, int b) { 39 return a == b; 40 } 41 42 public static boolean test1Snippet(int a, int b) { 43 int c = a; 44 if (c == b) { 45 c = 0x55; 46 } 47 if (c != 0x55) { 48 return false; 49 } 50 return true; 51 } 52 53 public static boolean test3Snippet(int a, int b) { 54 int val = (int) System.currentTimeMillis(); 55 int c = val + 1; 56 if (a == b) { 57 c = val; 58 } 59 if (c != val) { 60 return false; 61 } 62 return true; 63 } 64 65 public static boolean test2Snippet(int a, int b) { 66 int c; 67 if (a == b) { 68 c = 1; 69 } else { 70 c = 0; 71 } 72 return c == 1; 73 } 74 75 @Test(expected = AssertionError.class) 76 public void test1() { 77 test("test1Snippet"); 78 } 79 80 public void test2() { 81 test("test2Snippet"); 82 } 83 84 @Test(expected = AssertionError.class) 85 public void test3() { 86 test("test3Snippet"); 87 } 88 89 private void test(final String snippet) { 90 // No debug scope to reduce console noise for @Test(expected = ...) tests 91 StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES); 92 DebugContext debug = graph.getDebug(); 93 debug.dump(DebugContext.BASIC_LEVEL, graph, "Graph"); 94 new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders())); 95 StructuredGraph referenceGraph = parseEager(REFERENCE_SNIPPET, AllowAssumptions.YES); 96 assertEquals(referenceGraph, graph); 97 } 98 }