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comparison graal/GraalCompiler/src/com/sun/c1x/ir/LookupSwitch.java @ 2509:16b9a8b5ad39

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Renamings Runtime=>GraalRuntime and Compiler=>GraalCompiler
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 11:50:44 +0200
parents graal/Compiler/src/com/sun/c1x/ir/LookupSwitch.java@9ec15d6914ca
children 4a36a0bd6d18
comparison
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2508:fea94949e0a2 2509:16b9a8b5ad39
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 }