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annotate graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/AssertionNode.java @ 16406:ed91068c8af5

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cleanup in AssertionNode
author Lukas Stadler <lukas.stadler@oracle.com>
date Fri, 04 Jul 2014 16:06:44 +0200
parents b37dbfdfbbfb
children 5d468add216f
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1 /*
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2 * Copyright (c) 2014, 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.replacements.nodes;
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24
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25 import com.oracle.graal.compiler.common.*;
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26 import com.oracle.graal.compiler.common.type.*;
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27 import com.oracle.graal.graph.*;
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28 import com.oracle.graal.graph.spi.*;
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29 import com.oracle.graal.nodes.*;
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30 import com.oracle.graal.nodes.spi.*;
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31
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32 /**
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33 * Assertion nodes will go away as soon as the value evaluates to true. Compile-time assertions will
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34 * fail if this has not happened by the time the node is lowered to LIR, while runtime assertions
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35 * may need to insert a check.
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36 */
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37 public class AssertionNode extends FixedWithNextNode implements Lowerable, Canonicalizable, LIRLowerable {
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38
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39 @Input private ValueNode value;
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40
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41 private final boolean compileTimeAssertion;
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42 private final String message;
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43
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44 public AssertionNode(boolean compileTimeAssertion, ValueNode value, String message) {
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45 super(StampFactory.forVoid());
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46 this.value = value;
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47 this.compileTimeAssertion = compileTimeAssertion;
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48 this.message = message;
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49 }
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50
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51 public ValueNode value() {
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52 return value;
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53 }
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54
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55 public String message() {
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56 return message;
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57 }
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58
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59 @Override
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60 public Node canonical(CanonicalizerTool tool) {
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61 if (value.isConstant() && value.asConstant().asInt() != 0) {
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62 return null;
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63 }
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64 /*
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65 * Assertions with a constant "false" value do not immediately cause an error, since they
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66 * may be unreachable and could thus be removed by later optimizations.
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67 */
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68 return this;
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69 }
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70
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71 public void lower(LoweringTool tool) {
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72 if (!compileTimeAssertion) {
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73 tool.getLowerer().lower(this, tool);
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74 }
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75 }
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76
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77 public void generate(NodeLIRBuilderTool generator) {
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78 assert compileTimeAssertion;
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79 if (value.isConstant() && value.asConstant().asInt() == 0) {
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80 throw new GraalInternalError("%s: failed compile-time assertion: %s", this, message);
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81 } else {
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82 throw new GraalInternalError("%s: failed compile-time assertion (value %s): %s", this, value, message);
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83 }
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84 }
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85
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86 @SuppressWarnings("unused")
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87 @NodeIntrinsic
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88 public static void assertion(@ConstantNodeParameter boolean compileTimeAssertion, boolean value, @ConstantNodeParameter String message) {
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89 assert value : message;
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90 }
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91 }