Mercurial > hg > graal-jvmci-8
comparison graal/Compiler/src/com/sun/c1x/ir/LookupSwitch.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, 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.c1x.debug.InstructionPrinter.InstructionLineColumn.*; | |
26 | |
27 import java.util.*; | |
28 | |
29 import com.sun.c1x.debug.*; | |
30 import com.sun.c1x.value.*; | |
31 | |
32 /** | |
33 * The {@code LookupSwitch} instruction represents a lookup switch bytecode, which has a sorted | |
34 * array of key values. | |
35 * | |
36 * @author Ben L. Titzer | |
37 */ | |
38 public final class LookupSwitch extends Switch { | |
39 | |
40 final int[] keys; | |
41 | |
42 /** | |
43 * Constructs a new LookupSwitch instruction. | |
44 * @param value the instruction producing the value being switched on | |
45 * @param successors the list of successors | |
46 * @param keys the list of keys, sorted | |
47 * @param stateBefore the state before the switch | |
48 * @param isSafepoint {@code true} if this instruction is a safepoint | |
49 */ | |
50 public LookupSwitch(Value value, List<BlockBegin> successors, int[] keys, FrameState stateBefore, boolean isSafepoint) { | |
51 super(value, successors, stateBefore, isSafepoint); | |
52 this.keys = keys; | |
53 } | |
54 | |
55 /** | |
56 * Gets the key at the specified index. | |
57 * @param i the index | |
58 * @return the key at that index | |
59 */ | |
60 public int keyAt(int i) { | |
61 return keys[i]; | |
62 } | |
63 | |
64 public int keysLength() { | |
65 return keys.length; | |
66 } | |
67 | |
68 @Override | |
69 public void accept(ValueVisitor v) { | |
70 v.visitLookupSwitch(this); | |
71 } | |
72 | |
73 @Override | |
74 public void print(LogStream out) { | |
75 out.print("lookupswitch "); | |
76 if (isSafepoint()) { | |
77 out.print("(safepoint) "); | |
78 } | |
79 out.println(value()); | |
80 int l = numberOfCases(); | |
81 for (int i = 0; i < l; i++) { | |
82 INSTRUCTION.advance(out); | |
83 out.printf("case %5d: B%d%n", keyAt(i), successors().get(i).blockID); | |
84 } | |
85 INSTRUCTION.advance(out); | |
86 out.print("default : B").print(defaultSuccessor().blockID); | |
87 } | |
88 } |