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annotate graal/com.oracle.max.graal.hotspot/src/com/oracle/graal/hotspot/nodes/TailcallNode.java @ 5060:4ed4295ce15f

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Update import statements.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Thu, 08 Mar 2012 19:11:12 +0100
parents ed559a528128
children
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1 /*
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2 * Copyright (c) 2011, 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.hotspot.nodes;
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24
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25 import java.lang.reflect.*;
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26 import java.util.*;
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27
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28 import com.oracle.max.cri.ci.*;
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29 import com.oracle.max.cri.ri.*;
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30 import com.oracle.graal.compiler.gen.*;
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31 import com.oracle.graal.hotspot.*;
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32 import com.oracle.graal.hotspot.target.amd64.*;
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33 import com.oracle.graal.java.*;
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34 import com.oracle.graal.nodes.*;
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35 import com.oracle.graal.nodes.spi.*;
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36 import com.oracle.graal.nodes.type.*;
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37
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38 /**
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39 * Performs a tail call to the specified target compiled method, with the parameter taken from the supplied FrameState.
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40 */
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41 public class TailcallNode extends FixedWithNextNode implements LIRLowerable {
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42
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43 @Input private final FrameState frameState;
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44 @Input private final ValueNode target;
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45
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46 /**
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47 * Creates a TailcallNode.
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48 * @param target points to the start of an nmethod
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49 * @param frameState the parameters will be taken from this FrameState
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50 */
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51 public TailcallNode(ValueNode target, FrameState frameState) {
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52 super(StampFactory.illegal());
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53 this.target = target;
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54 this.frameState = frameState;
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55 }
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56
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57 @Override
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58 public void generate(LIRGeneratorTool generator) {
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59 LIRGenerator gen = (LIRGenerator) generator;
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60 HotSpotVMConfig config = CompilerImpl.getInstance().getConfig();
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61 RiResolvedMethod method = frameState.method();
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62 boolean isStatic = Modifier.isStatic(method.accessFlags());
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63
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64 CiKind[] signature = CiUtil.signatureToKinds(method.signature(), isStatic ? null : method.holder().kind(true));
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65 CiCallingConvention cc = gen.frameMap().registerConfig.getCallingConvention(CiCallingConvention.Type.JavaCall, signature, gen.target(), false);
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66 gen.frameMap().callsMethod(cc, CiCallingConvention.Type.JavaCall); // TODO (aw): I think this is unnecessary for a tail call.
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67 List<ValueNode> parameters = new ArrayList<>();
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68 for (int i = 0, slot = 0; i < cc.locations.length; i++, slot += FrameStateBuilder.stackSlots(frameState.localAt(slot).kind())) {
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69 parameters.add(frameState.localAt(slot));
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70 }
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71 List<CiValue> argList = gen.visitInvokeArguments(cc, parameters);
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72
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73 CiValue entry = gen.emitLoad(new CiAddress(CiKind.Long, gen.operand(target), config.nmethodEntryOffset), false);
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74
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75 gen.append(new AMD64TailcallOp(argList, entry, cc.locations));
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76 }
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77 }