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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/FloatingReadNode.java @ 17450:45b45f902bed

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removed Node generation (GRAAL-857)
author Doug Simon <doug.simon@oracle.com>
date Wed, 15 Oct 2014 15:35:33 +0200
parents 845e881ce054
children 498a56d8bb9b
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1 /*
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2 * Copyright (c) 2011, 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.nodes.extended;
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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.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.nodeinfo.*;
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30 import com.oracle.graal.nodes.*;
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31 import com.oracle.graal.nodes.spi.*;
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32
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33 /**
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34 * A floating read of a value from memory specified in terms of an object base and an object
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35 * relative location. This node does not null check the object.
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36 */
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37 @NodeInfo
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38 public class FloatingReadNode extends FloatingAccessNode implements IterableNodeType, LIRLowerable, Canonicalizable {
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39
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40 @OptionalInput(InputType.Memory) MemoryNode lastLocationAccess;
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41
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42 public static FloatingReadNode create(ValueNode object, LocationNode location, MemoryNode lastLocationAccess, Stamp stamp) {
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43 return new FloatingReadNode(object, location, lastLocationAccess, stamp);
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44 }
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45
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46 protected FloatingReadNode(ValueNode object, LocationNode location, MemoryNode lastLocationAccess, Stamp stamp) {
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47 this(object, location, lastLocationAccess, stamp, null, BarrierType.NONE);
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48 }
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49
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50 public static FloatingReadNode create(ValueNode object, LocationNode location, MemoryNode lastLocationAccess, Stamp stamp, GuardingNode guard) {
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51 return new FloatingReadNode(object, location, lastLocationAccess, stamp, guard);
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52 }
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53
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54 protected FloatingReadNode(ValueNode object, LocationNode location, MemoryNode lastLocationAccess, Stamp stamp, GuardingNode guard) {
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55 this(object, location, lastLocationAccess, stamp, guard, BarrierType.NONE);
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56 }
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57
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58 public static FloatingReadNode create(ValueNode object, LocationNode location, MemoryNode lastLocationAccess, Stamp stamp, GuardingNode guard, BarrierType barrierType) {
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59 return new FloatingReadNode(object, location, lastLocationAccess, stamp, guard, barrierType);
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60 }
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61
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62 protected FloatingReadNode(ValueNode object, LocationNode location, MemoryNode lastLocationAccess, Stamp stamp, GuardingNode guard, BarrierType barrierType) {
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63 super(object, location, stamp, guard, barrierType);
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64 this.lastLocationAccess = lastLocationAccess;
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65 }
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66
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67 public MemoryNode getLastLocationAccess() {
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68 return lastLocationAccess;
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69 }
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70
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71 public void setLastLocationAccess(MemoryNode newlla) {
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72 updateUsages(ValueNodeUtil.asNode(lastLocationAccess), ValueNodeUtil.asNode(newlla));
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73 lastLocationAccess = newlla;
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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 gen) {
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78 Value address = location().generateAddress(gen, gen.getLIRGeneratorTool(), gen.operand(object()));
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79 LIRKind readKind = gen.getLIRGeneratorTool().getLIRKind(stamp());
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80 gen.setResult(this, gen.getLIRGeneratorTool().emitLoad(readKind, address, null));
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81 }
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82
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83 @Override
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84 public Node canonical(CanonicalizerTool tool) {
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85 if (object() instanceof PiNode && ((PiNode) object()).getGuard() == getGuard()) {
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86 return FloatingReadNode.create(((PiNode) object()).getOriginalNode(), location(), getLastLocationAccess(), stamp(), getGuard(), getBarrierType());
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87 }
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88 return ReadNode.canonicalizeRead(this, location(), object(), tool);
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89 }
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91 @Override
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92 public FixedAccessNode asFixedNode() {
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93 return graph().add(ReadNode.create(object(), accessLocation(), stamp(), getGuard(), getBarrierType()));
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94 }
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95
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96 @Override
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97 public boolean verify() {
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98 MemoryNode lla = getLastLocationAccess();
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99 assert lla == null || lla instanceof MemoryCheckpoint || lla instanceof MemoryProxy || lla instanceof MemoryPhiNode : "lastLocationAccess of " + this +
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100 " should be a MemoryCheckpoint, but is " + lla;
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101 return super.verify();
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102 }
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103 }