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comparison graal/GraalCompiler/src/com/sun/c1x/lir/LIRTableSwitch.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/lir/LIRTableSwitch.java@9ec15d6914ca
children c1ce2a53d6c3
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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.lir;
24
25 import com.sun.c1x.ir.*;
26 import com.sun.cri.ci.*;
27
28 /**
29 * @author Doug Simon
30 */
31 public class LIRTableSwitch extends LIRInstruction {
32
33 public BlockBegin defaultTarget;
34
35 public final BlockBegin[] targets;
36
37 public final int lowKey;
38
39 public LIRTableSwitch(CiValue value, int lowKey, BlockBegin defaultTarget, BlockBegin[] targets) {
40 super(LIROpcode.TableSwitch, CiValue.IllegalValue, null, false, 1, 0, value);
41 this.lowKey = lowKey;
42 this.targets = targets;
43 this.defaultTarget = defaultTarget;
44 }
45
46 @Override
47 public void emitCode(LIRAssembler masm) {
48 masm.emitTableSwitch(this);
49 }
50
51 /**
52 * @return the input value to this switch
53 */
54 public CiValue value() {
55 return operand(0);
56 }
57
58 @Override
59 public String operationString(OperandFormatter operandFmt) {
60 StringBuilder buf = new StringBuilder(super.operationString(operandFmt));
61 buf.append("\ndefault: [B").append(defaultTarget.blockID).append(']');
62 int key = lowKey;
63 for (BlockBegin b : targets) {
64 buf.append("\ncase ").append(key).append(": [B").append(b.blockID).append(']');
65 key++;
66 }
67 return buf.toString();
68 }
69
70 private BlockBegin substitute(BlockBegin block, BlockBegin oldBlock, BlockBegin newBlock) {
71 if (block == oldBlock) {
72 LIRInstruction instr = newBlock.lir().instructionsList().get(0);
73 assert instr instanceof LIRLabel : "first instruction of block must be label";
74 return newBlock;
75 }
76 return oldBlock;
77 }
78
79 public void substitute(BlockBegin oldBlock, BlockBegin newBlock) {
80 if (substitute(defaultTarget, oldBlock, newBlock) == newBlock) {
81 defaultTarget = newBlock;
82 }
83 for (int i = 0; i < targets.length; i++) {
84 if (substitute(targets[i], oldBlock, newBlock) == newBlock) {
85 targets[i] = newBlock;
86 }
87 }
88 }
89 }