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annotate graal/GraalCompiler/src/com/sun/c1x/ir/Return.java @ 2712:a0dd2b907806

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Removed implicit safepoints.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Thu, 19 May 2011 13:09:37 +0200
parents 0c6564c254af
children 0fe79e7435c3
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1 /*
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2 * Copyright (c) 2009, 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.sun.c1x.ir;
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24
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25 import com.oracle.graal.graph.*;
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26 import com.sun.c1x.debug.*;
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27 import com.sun.cri.ci.*;
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28
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29 /**
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30 * The {@code Return} class definition.
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31 */
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32 public final class Return extends BlockEnd {
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33
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34 private static final int INPUT_COUNT = 1;
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35 private static final int INPUT_RESULT = 0;
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36
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37 private static final int SUCCESSOR_COUNT = 0;
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38
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39 @Override
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40 protected int inputCount() {
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41 return super.inputCount() + INPUT_COUNT;
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42 }
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43
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44 @Override
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45 protected int successorCount() {
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46 return super.successorCount() + SUCCESSOR_COUNT;
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47 }
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48
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49 /**
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50 * The instruction that produces the result for the return.
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51 */
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52 public Value result() {
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53 return (Value) inputs().get(super.inputCount() + INPUT_RESULT);
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54 }
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55
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56 public Value setResult(Value n) {
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57 return (Value) inputs().set(super.inputCount() + INPUT_RESULT, n);
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58 }
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59
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60 /**
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61 * Constructs a new Return instruction.
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62 * @param result the instruction producing the result for this return; {@code null} if this
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63 * is a void return
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64 * @param isSafepoint {@code true} if this instruction is a safepoint instruction
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65 * @param graph
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66 */
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67 public Return(Value result, Graph graph) {
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68 super(result == null ? CiKind.Void : result.kind, null, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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69 setResult(result);
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70 }
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71
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72 @Override
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73 public void accept(ValueVisitor v) {
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74 v.visitReturn(this);
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75 }
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76
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77 @Override
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78 public void print(LogStream out) {
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79 if (result() == null) {
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80 out.print("return");
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81 } else {
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82 out.print(kind.typeChar).print("return ").print(result());
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83 }
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84 }
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85 }