1 /* 2 * Copyright (c) 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.replacements.test; 26 27 import jdk.vm.ci.aarch64.AArch64; 28 import jdk.vm.ci.amd64.AMD64; 29 import jdk.vm.ci.meta.ResolvedJavaMethod; 30 import org.graalvm.compiler.graph.Node; 31 import org.graalvm.compiler.nodes.StructuredGraph; 32 import org.graalvm.compiler.options.OptionValues; 33 import org.graalvm.compiler.replacements.nodes.ArrayCompareToNode; 34 import org.graalvm.compiler.serviceprovider.GraalServices; 35 import org.junit.Assert; 36 import org.junit.Assume; 37 import org.junit.Test; 38 39 import java.util.List; 40 41 import static org.graalvm.compiler.core.common.GraalOptions.RemoveNeverExecutedCode; 42 43 /** 44 * Tests compareTo method intrinsic. 45 */ 46 public class StringCompareToTest extends StringSubstitutionTestBase { 47 48 // The compareTo() implementation in java.lang.String has 4 calls to compareTo implementation. 49 private static final int EXPECT_NODE_COUNT = 4; 50 private static final String DISABLE_COMPACTSTRINGS_FLAG = "-XX:-CompactStrings"; 51 52 public StringCompareToTest() { 53 initSubstitution( 54 getResolvedJavaMethod(String.class, "compareTo", String.class), 55 getResolvedJavaMethod("stringCompareTo"), 56 ArrayCompareToNode.class); 57 } 58 59 private int countNode(ResolvedJavaMethod method, Class<?> expectedNode, OptionValues options) { 60 StructuredGraph graph = parseForCompile(method, options); 61 applyFrontEnd(graph); 62 63 int c = 0; 64 for (Node node : graph.getNodes()) { 65 if (expectedNode.isInstance(node)) { 66 c += 1; 67 } 68 } 69 70 return c; 71 } 72 73 @Override 74 protected void initSubstitution(ResolvedJavaMethod theRealMethod, 75 ResolvedJavaMethod theTestMethod, Class<?> expectedNode) { 76 Assume.assumeTrue((getTarget().arch instanceof AMD64) || (getTarget().arch instanceof AArch64)); 77 78 realMethod = theRealMethod; 79 testMethod = theTestMethod; 80 81 StructuredGraph graph = testGraph(testMethod.getName()); 82 83 // Check to see if the resulting graph contains the expected node 84 StructuredGraph replacement = getReplacements().getSubstitution(realMethod, -1, false, null); 85 if (replacement == null) { 86 assertInGraph(graph, expectedNode); 87 } 88 89 OptionValues options; 90 boolean needCheckNode = true; 91 92 if (GraalServices.Java8OrEarlier) { 93 needCheckNode = false; 94 } else { 95 List<String> vmArgs = GraalServices.getInputArguments(); 96 for (String vmArg : vmArgs) { 97 if (vmArg.equals(DISABLE_COMPACTSTRINGS_FLAG)) { 98 needCheckNode = false; 99 } 100 } 101 } 102 103 if (needCheckNode) { 104 options = new OptionValues(getInitialOptions(), RemoveNeverExecutedCode, false); 105 Assert.assertEquals(EXPECT_NODE_COUNT, countNode(testMethod, expectedNode, options)); 106 } else { 107 options = getInitialOptions(); 108 } 109 110 // Force compilation. 111 testCode = getCode(testMethod, options); 112 Assert.assertNotNull(testCode); 113 } 114 115 public static int stringCompareTo(String a, String b) { 116 return a.compareTo(b); 117 } 118 119 @Test 120 @Override 121 public void testEqualString() { 122 super.testEqualString(); 123 } 124 125 @Test 126 @Override 127 public void testDifferentString() { 128 super.testDifferentString(); 129 } 130 131 @Test 132 @Override 133 public void testAllStrings() { 134 super.testAllStrings(); 135 } 136 }