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annotate graal/GraalCompiler/src/com/sun/c1x/lir/LIRLabel.java @ 2677:0ea5f12e873a

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use com.oracle.max.asm project for assembler
author Christian.Wimmer@Oracle.com
date Fri, 13 May 2011 17:09:20 -0700
parents 16b9a8b5ad39
children
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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.oracle.max.asm.*;
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26 import com.sun.cri.ci.*;
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27
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28 /**
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29 * The {@code LIRLabel} class definition.
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30 *
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31 * @author Marcelo Cintra
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32 */
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33 public class LIRLabel extends LIROp0 {
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34
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35 private Label label;
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36
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37 /**
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38 * Constructs a LIRLabel instruction.
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39 * @param label the label
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40 */
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41 public LIRLabel(Label label) {
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42 super(LIROpcode.Label, CiValue.IllegalValue, null);
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43 assert label != null;
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44 this.label = label;
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45 }
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46
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47 /**
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48 * Gets the label associated to this instruction.
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49 * @return the label
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50 */
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51 public Label label() {
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52 return label;
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53 }
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54
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55 /**
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56 * Emits target assembly code for this LIRLabel instruction.
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57 * @param masm the LIRAssembler
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58 */
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59 @Override
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60 public void emitCode(LIRAssembler masm) {
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61 masm.emitOpLabel(this);
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62 }
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63
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64 /**
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65 * Prints this instruction to a LogStream.
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66 */
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67 @Override
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68 public String operationString(OperandFormatter operandFmt) {
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69 return label.isBound() ? String.valueOf(label.position()) : "?";
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70 }
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71 }