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annotate graal/Compiler/src/com/sun/c1x/lir/LIRBlock.java @ 2507:9ec15d6914ca

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Pull over of compiler from maxine repository.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 11:43:22 +0200
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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.lir;
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24
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25 import com.sun.c1x.alloc.*;
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26 import com.sun.c1x.asm.*;
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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 LIRBlock} class definition.
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31 *
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32 * @author Ben L. Titzer
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33 */
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34 public final class LIRBlock {
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35
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36 public LIRBlock() {
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37 }
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38
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39 public final Label label = new Label();
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40 private LIRList lir;
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41
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42 /**
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43 * Bit map specifying which {@linkplain OperandPool operands} are live upon entry to this block.
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44 * These are values used in this block or any of its successors where such value are not defined
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45 * in this block.
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46 * The bit index of an operand is its {@linkplain OperandPool#operandNumber(com.sun.cri.ci.CiValue) operand number}.
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47 */
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48 public CiBitMap liveIn;
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49
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50 /**
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51 * Bit map specifying which {@linkplain OperandPool operands} are live upon exit from this block.
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52 * These are values used in a successor block that are either defined in this block or were live
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53 * upon entry to this block.
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54 * The bit index of an operand is its {@linkplain OperandPool#operandNumber(com.sun.cri.ci.CiValue) operand number}.
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55 */
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56 public CiBitMap liveOut;
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57
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58 /**
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59 * Bit map specifying which {@linkplain OperandPool operands} are used (before being defined) in this block.
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60 * That is, these are the values that are live upon entry to the block.
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61 * The bit index of an operand is its {@linkplain OperandPool#operandNumber(com.sun.cri.ci.CiValue) operand number}.
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62 */
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63 public CiBitMap liveGen;
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64
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65 /**
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66 * Bit map specifying which {@linkplain OperandPool operands} are defined/overwritten in this block.
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67 * The bit index of an operand is its {@linkplain OperandPool#operandNumber(com.sun.cri.ci.CiValue) operand number}.
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68 */
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69 public CiBitMap liveKill;
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70
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71 public int firstLirInstructionID;
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72 public int lastLirInstructionID;
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73 public int exceptionHandlerPCO;
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74
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75 public LIRList lir() {
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76 return lir;
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77 }
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78
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79 public void setLir(LIRList lir) {
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80 this.lir = lir;
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81 }
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82 }