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annotate graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/nodes/typesystem/UnsafeTypeCastMacroNode.java @ 19410:61d3cb8e1280

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Add generic parameter to NodeClass. Change Graph#getNodes(Class) to Graph#getNodes(NodeClass).
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Mon, 16 Feb 2015 17:47:43 +0100
parents 7e2c87dae93e
children 9c4168877444
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1 /*
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2 * Copyright (c) 2013, 2015, 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.truffle.nodes.typesystem;
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24
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25 import com.oracle.graal.api.meta.*;
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26 import com.oracle.graal.compiler.common.calc.*;
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27 import com.oracle.graal.compiler.common.type.*;
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28 import com.oracle.graal.graph.*;
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29 import com.oracle.graal.graph.spi.*;
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30 import com.oracle.graal.nodeinfo.*;
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31 import com.oracle.graal.nodes.*;
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32 import com.oracle.graal.nodes.calc.*;
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33 import com.oracle.graal.nodes.util.*;
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34 import com.oracle.graal.truffle.nodes.asserts.*;
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35
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36 /**
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37 * Macro node for method CompilerDirectives#unsafeCast.
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38 */
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39 @NodeInfo
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40 public final class UnsafeTypeCastMacroNode extends NeverPartOfCompilationNode implements Simplifiable {
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41
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42 public static final NodeClass<UnsafeTypeCastMacroNode> TYPE = NodeClass.get(UnsafeTypeCastMacroNode.class);
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43 private static final int OBJECT_ARGUMENT_INDEX = 0;
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44 private static final int CLASS_ARGUMENT_INDEX = 1;
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45 private static final int CONDITION_ARGUMENT_INDEX = 2;
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46 private static final int NONNULL_ARGUMENT_INDEX = 3;
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47 private static final int ARGUMENT_COUNT = 4;
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48
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49 public UnsafeTypeCastMacroNode(Invoke invoke) {
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50 super(TYPE, invoke, "The class of the unsafe cast could not be reduced to a compile time constant.");
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51 assert arguments.size() == ARGUMENT_COUNT;
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52 }
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53
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54 @Override
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55 public void simplify(SimplifierTool tool) {
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56 ValueNode classArgument = arguments.get(CLASS_ARGUMENT_INDEX);
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57 ValueNode nonNullArgument = arguments.get(NONNULL_ARGUMENT_INDEX);
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58 if (classArgument.isConstant() && nonNullArgument.isConstant()) {
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59 ValueNode objectArgument = arguments.get(OBJECT_ARGUMENT_INDEX);
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60 ValueNode conditionArgument = arguments.get(CONDITION_ARGUMENT_INDEX);
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61 ResolvedJavaType lookupJavaType = tool.getConstantReflection().asJavaType(classArgument.asConstant());
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62 tool.addToWorkList(usages());
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63 if (lookupJavaType == null) {
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64 replaceAtUsages(objectArgument);
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65 GraphUtil.removeFixedWithUnusedInputs(this);
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66 } else {
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67 Stamp piStamp = StampFactory.declaredTrusted(lookupJavaType, nonNullArgument.asJavaConstant().asInt() != 0);
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68 ConditionAnchorNode valueAnchorNode = graph().add(
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69 new ConditionAnchorNode(CompareNode.createCompareNode(graph(), Condition.EQ, conditionArgument, ConstantNode.forBoolean(true, graph()), tool.getConstantReflection())));
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70 PiNode piCast = graph().unique(new PiNode(objectArgument, piStamp, valueAnchorNode));
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71 replaceAtUsages(piCast);
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72 graph().replaceFixedWithFixed(this, valueAnchorNode);
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73 }
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74 }
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75 }
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76 }