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annotate graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/ReadRegisterNode.java @ 16841:cbd42807a31f

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moved NodeInfo and friends into separate com.oracle.graal.nodeinfo project so that annotation processor can be applied to the base Node class
author Doug Simon <doug.simon@oracle.com>
date Fri, 15 Aug 2014 11:34:38 +0200
parents 5d468add216f
children 06c15e88d383
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1 /*
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2 * Copyright (c) 2012, 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.api.code.*;
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26 import com.oracle.graal.api.meta.*;
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27 import com.oracle.graal.compiler.common.type.*;
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28 import com.oracle.graal.nodeinfo.*;
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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 * Access the value of a specific register.
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34 */
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35 @NodeInfo(nameTemplate = "ReadRegister %{p#register}")
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36 public class ReadRegisterNode extends FixedWithNextNode implements LIRLowerable {
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37
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38 /**
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39 * The fixed register to access.
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40 */
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41 private final Register register;
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42
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43 /**
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44 * When true, subsequent uses of this node use the fixed register; when false, the value is
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45 * moved into a new virtual register so that the fixed register is not seen by uses.
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46 */
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47 private final boolean directUse;
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48
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49 /**
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50 * When true, this node is also an implicit definition of the value for the register allocator,
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51 * i.e., the register is an implicit incoming value; when false, the register must be defined in
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52 * the same method or must be an register excluded from register allocation.
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53 */
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54 private final boolean incoming;
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55
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56 public ReadRegisterNode(Register register, Kind kind, boolean directUse, boolean incoming) {
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57 super(StampFactory.forKind(kind));
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58 assert register != null;
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59 this.register = register;
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60 this.directUse = directUse;
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61 this.incoming = incoming;
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62 }
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63
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64 /**
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65 * Constructor to be used by node intrinsics where the stamp is inferred from the intrinsic
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66 * definition.
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67 */
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68 public ReadRegisterNode(Register register, boolean directUse, boolean incoming) {
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69 super(StampFactory.forNodeIntrinsic());
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70 assert register != null;
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71 this.register = register;
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72 this.directUse = directUse;
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73 this.incoming = incoming;
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74 }
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75
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76 @Override
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77 public void generate(NodeLIRBuilderTool generator) {
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78 LIRKind kind = generator.getLIRGeneratorTool().getLIRKind(stamp());
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79 Value result = register.asValue(kind);
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80 if (incoming) {
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81 generator.getLIRGeneratorTool().emitIncomingValues(new Value[]{result});
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82 }
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83 if (!directUse) {
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84 result = generator.getLIRGeneratorTool().emitMove(result);
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85 }
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86 generator.setResult(this, result);
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87 }
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88
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89 @Override
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90 public String toString(Verbosity verbosity) {
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91 if (verbosity == Verbosity.Name) {
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92 return super.toString(Verbosity.Name) + "%" + register;
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93 } else {
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94 return super.toString(verbosity);
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95 }
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96 }
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97 }