Mercurial > hg > graal-jvmci-8

comparison graal/Compiler/src/com/sun/c1x/ir/Infopoint.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 /*
2 * Copyright (c) 2010, 2011, 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.ir;
24
25 import static com.sun.cri.bytecode.Bytecodes.*;
26
27 import com.sun.c1x.debug.*;
28 import com.sun.c1x.value.*;
29 import com.sun.cri.bytecode.*;
30 import com.sun.cri.ci.*;
31
32 /**
33 * Records debug info at the current code location.
34 *
35 * @author Doug Simon
36 */
37 public final class Infopoint extends Instruction {
38
39 public final FrameState state;
40
41 /**
42 * {@link Bytecodes#HERE}, {@link Bytecodes#INFO} or {@link Bytecodes#SAFEPOINT}.
43 */
44 public final int opcode;
45
46 /**
47 * Creates a new Infopoint instance.
48 * @param state the debug info at this instruction
49 */
50 public Infopoint(int opcode, FrameState state) {
51 super(opcode == HERE ? CiKind.Long : CiKind.Void);
52 assert opcode == HERE || opcode == INFO || opcode == SAFEPOINT : Bytecodes.nameOf(opcode);
53 this.opcode = opcode;
54 this.state = state;
55 setFlag(Flag.LiveSideEffect); // ensure this instruction is not eliminated
56 if (opcode == SAFEPOINT) {
57 setFlag(Value.Flag.IsSafepoint);
58 }
59 }
60
61 @Override
62 public void accept(ValueVisitor v) {
63 v.visitInfopoint(this);
64 }
65
66 @Override
67 public FrameState stateBefore() {
68 return state;
69 }
70
71 @Override
72 public void print(LogStream out) {
73 out.print(Bytecodes.nameOf(opcode));
74 }
75 }