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comparison graal/Compiler/src/com/sun/c1x/lir/LIRLabel.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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2506:4a3bf8a5bf41 2507:9ec15d6914ca
1 /*
2 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package com.sun.c1x.lir;
24
25 import com.sun.c1x.asm.*;
26 import com.sun.cri.ci.*;
27
28 /**
29 * The {@code LIRLabel} class definition.
30 *
31 * @author Marcelo Cintra
32 */
33 public class LIRLabel extends LIROp0 {
34
35 private Label label;
36
37 /**
38 * Constructs a LIRLabel instruction.
39 * @param label the label
40 */
41 public LIRLabel(Label label) {
42 super(LIROpcode.Label, CiValue.IllegalValue, null);
43 assert label != null;
44 this.label = label;
45 }
46
47 /**
48 * Gets the label associated to this instruction.
49 * @return the label
50 */
51 public Label label() {
52 return label;
53 }
54
55 /**
56 * Emits target assembly code for this LIRLabel instruction.
57 * @param masm the LIRAssembler
58 */
59 @Override
60 public void emitCode(LIRAssembler masm) {
61 masm.emitOpLabel(this);
62 }
63
64 /**
65 * Prints this instruction to a LogStream.
66 */
67 @Override
68 public String operationString(OperandFormatter operandFmt) {
69 return label.isBound() ? String.valueOf(label.position()) : "?";
70 }
71 }