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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/WriteNode.java @ 14945:b14cb2d9253d

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Make compression and uncompression explicit in the high level graph.
author Roland Schatz <roland.schatz@oracle.com>
date Wed, 02 Apr 2014 15:26:58 +0200
parents f6630873316b
children d5a1206e1923
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2011, 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.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.graph.spi.*;
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27 import com.oracle.graal.nodes.*;
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28 import com.oracle.graal.nodes.extended.LocationNode.Location;
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29 import com.oracle.graal.nodes.spi.*;
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30 import com.oracle.graal.nodes.virtual.*;
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31
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32 /**
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33 * Writes a given {@linkplain #value() value} a {@linkplain FixedAccessNode memory location}.
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34 */
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35 public final class WriteNode extends AbstractWriteNode implements LIRLowerable, Simplifiable, Virtualizable {
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36
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37 public WriteNode(ValueNode object, ValueNode value, ValueNode location, BarrierType barrierType, boolean compressible) {
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38 super(object, value, location, barrierType, compressible);
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39 }
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40
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41 public WriteNode(ValueNode object, ValueNode value, ValueNode location, BarrierType barrierType, boolean compressible, boolean initialization) {
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42 super(object, value, location, barrierType, compressible, initialization);
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43 }
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44
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45 @Override
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46 public void generate(NodeLIRBuiderTool gen) {
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47 Value address = location().generateAddress(gen, gen.operand(object()));
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48 // It's possible a constant was forced for other usages so inspect the value directly and
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49 // use a constant if it can be directly stored.
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50 Value v;
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51 if (value().isConstant() && gen.getLIRGeneratorTool().canStoreConstant(value().asConstant(), isCompressible())) {
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52 v = value().asConstant();
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53 } else {
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54 v = gen.operand(value());
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55 }
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56 PlatformKind writeKind = gen.getLIRGeneratorTool().getPlatformKind(value().stamp());
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57 gen.getLIRGeneratorTool().emitStore(writeKind, address, v, this);
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58 }
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59
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60 @Override
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61 public void simplify(SimplifierTool tool) {
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62 if (object() instanceof PiNode && ((PiNode) object()).getGuard() == getGuard()) {
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63 setObject(((PiNode) object()).getOriginalValue());
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64 }
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65 }
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66
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67 @NodeIntrinsic
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68 public static native void writeMemory(Object object, Object value, Location location, @ConstantNodeParameter BarrierType barrierType, @ConstantNodeParameter boolean compressible);
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69
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70 @Override
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71 public void virtualize(VirtualizerTool tool) {
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72 if (location() instanceof ConstantLocationNode) {
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73 ConstantLocationNode constantLocation = (ConstantLocationNode) location();
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74 State state = tool.getObjectState(object());
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75 if (state != null && state.getState() == EscapeState.Virtual) {
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76 VirtualObjectNode virtual = state.getVirtualObject();
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77 int entryIndex = virtual.entryIndexForOffset(constantLocation.getDisplacement());
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78 if (entryIndex != -1 && virtual.entryKind(entryIndex) == constantLocation.getValueKind()) {
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79 tool.setVirtualEntry(state, entryIndex, value(), false);
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80 tool.delete();
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81 }
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82 }
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83 }
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84 }
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85 }