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annotate graal/com.oracle.graal.tests/src/com/oracle/graal/compiler/tests/CompareCanonicalizerTest.java @ 5425:0364a2a874b8

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changes towards a canonical representation of comparisons: * new createNullCheckGuard helper method on CiLoweringTool * replaced NullCheckNode with IsNullNode * GuardNode and FixedGuardNode can be negated * keep a list of conditions that are true/false in CheckCastEliminationPhase * FixedGuardNode has only one condition * GraphBuilderPhase creates canonical CompareNodes * BooleanNodes can negate their usages * added junit test for canonicalized compares * removed junit test for negated instanceof * added more thorough graph comparison for junit tests * CheckCastEliminationPhase keeps track of conditions that are known to be true/false
author Lukas Stadler <lukas.stadler@jku.at>
date Tue, 22 May 2012 16:19:02 +0200
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children 0083a59ced84
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5425
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.compiler.tests;
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24
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25 import org.junit.*;
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26
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27 import com.oracle.graal.compiler.phases.*;
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28 import com.oracle.graal.nodes.*;
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29
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30 public class CompareCanonicalizerTest extends GraphTest {
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31
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32 @Test
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33 public void testCanonicalComparison() {
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34 StructuredGraph referenceGraph = parse("referenceCanonicalComparison");
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35 for (int i = 1; i < 4; i++) {
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36 StructuredGraph graph = parse("canonicalCompare" + i);
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37 assertEquals(referenceGraph, graph);
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38 }
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39 new CanonicalizerPhase(null, runtime(), null).apply(referenceGraph);
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40 for (int i = 1; i < 4; i++) {
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41 StructuredGraph graph = parse("canonicalCompare" + i);
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42 new CanonicalizerPhase(null, runtime(), null).apply(graph);
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43 assertEquals(referenceGraph, graph);
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44 }
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45 }
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46
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47 public static int referenceCanonicalComparison(int a, int b) {
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48 if (a < b) {
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49 return 1;
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50 } else {
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51 return 2;
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52 }
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53 }
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54
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55 public static int canonicalCompare1(int a, int b) {
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56 if (a >= b) {
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57 return 2;
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58 } else {
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59 return 1;
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60 }
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61 }
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62
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63 public static int canonicalCompare2(int a, int b) {
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64 if (b > a) {
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65 return 1;
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66 } else {
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67 return 2;
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68 }
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69 }
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70
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71 public static int canonicalCompare3(int a, int b) {
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72 if (b <= a) {
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73 return 2;
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74 } else {
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75 return 1;
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76 }
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77 }
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78 }