Mercurial > hg > truffle
comparison graal/Compiler/src/com/sun/c1x/ir/Switch.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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2506:4a3bf8a5bf41 | 2507:9ec15d6914ca |
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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.ir; | |
24 | |
25 import java.util.*; | |
26 | |
27 import com.sun.c1x.value.*; | |
28 import com.sun.cri.ci.*; | |
29 | |
30 /** | |
31 * The {@code Switch} class is the base of both lookup and table switches. | |
32 * | |
33 * @author Ben L. Titzer | |
34 */ | |
35 public abstract class Switch extends BlockEnd { | |
36 | |
37 Value value; | |
38 | |
39 /** | |
40 * Constructs a new Switch. | |
41 * @param value the instruction that provides the value to be switched over | |
42 * @param successors the list of successors of this switch | |
43 * @param stateBefore the state before the switch | |
44 * @param isSafepoint {@code true} if this switch is a safepoint | |
45 */ | |
46 public Switch(Value value, List<BlockBegin> successors, FrameState stateBefore, boolean isSafepoint) { | |
47 super(CiKind.Illegal, stateBefore, isSafepoint, successors); | |
48 this.value = value; | |
49 } | |
50 | |
51 /** | |
52 * Gets the instruction that provides the input value to this switch. | |
53 * @return the instruction producing the input value | |
54 */ | |
55 public Value value() { | |
56 return value; | |
57 } | |
58 | |
59 /** | |
60 * Gets the number of cases that this switch covers (excluding the default case). | |
61 * @return the number of cases | |
62 */ | |
63 public int numberOfCases() { | |
64 return successors.size() - 1; | |
65 } | |
66 | |
67 /** | |
68 * Iterates over the inputs to this instruction. | |
69 * @param closure the closure to apply | |
70 */ | |
71 @Override | |
72 public void inputValuesDo(ValueClosure closure) { | |
73 value = closure.apply(value); | |
74 } | |
75 } |