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annotate graal/com.oracle.max.graal.hotspot/src/com/oracle/graal/hotspot/target/amd64/AMD64TailcallOp.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, 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.hotspot.target.amd64;
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24
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25 import static com.oracle.max.cri.ci.CiValueUtil.*;
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26
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27 import java.util.*;
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28
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29 import com.oracle.max.asm.target.amd64.*;
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30 import com.oracle.max.cri.ci.*;
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31 import com.oracle.graal.graph.*;
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32 import com.oracle.graal.lir.*;
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33 import com.oracle.graal.lir.amd64.*;
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34 import com.oracle.graal.lir.asm.*;
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35
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36 /**
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37 * Performs a hard-coded tail call to the specified target, which normally should be an RiCompiledCode instance.
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38 */
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39 public class AMD64TailcallOp extends AMD64LIRInstruction {
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40
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41 public AMD64TailcallOp(List<CiValue> parameters, CiValue target, CiValue[] callingConvention) {
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42 super("TAILCALL", LIRInstruction.NO_OPERANDS, null, toArray(parameters, target), LIRInstruction.NO_OPERANDS, callingConvention.clone());
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43 assert inputs.length == temps.length + 1;
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44
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45 for (int i = 0; i < temps.length; i++) {
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46 assert isRegister(temps[i]) : "too many parameters for tail call";
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47 assert sameRegister(temps[i], inputs[i]) : "inputs do not match calling convention";
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48 }
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49 }
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50
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51 private static CiValue[] toArray(List<CiValue> parameters, CiValue target) {
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52 CiValue[] result = new CiValue[parameters.size() + 1];
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53 parameters.toArray(result);
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54 result[parameters.size()] = target;
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55 return result;
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56 }
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57
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58 @Override
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59 public void emitCode(TargetMethodAssembler tasm, AMD64MacroAssembler masm) {
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60 // destroy the current frame (now the return address is the top of stack)
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61 masm.leave();
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62
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63 // jump to the target method
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64 masm.jmp(asRegister(inputs[inputs.length - 1]));
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65 masm.ensureUniquePC();
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66 }
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67
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68 @Override
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69 protected EnumSet<OperandFlag> flagsFor(OperandMode mode, int index) {
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70 if (mode == OperandMode.Input) {
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71 return EnumSet.of(OperandFlag.Register);
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72 } else if (mode == OperandMode.Temp) {
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73 return EnumSet.of(OperandFlag.Register);
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74 }
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75 throw GraalInternalError.shouldNotReachHere();
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76 }
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77 }