Mercurial > hg > truffle

annotate graal/GraalCompiler/src/com/sun/c1x/ir/Switch.java @ 2762:ca31e84ff154

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Javadoc clean up.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Sat, 21 May 2011 17:56:11 +0200
parents 6048da340364
children 93fd92c9f8b0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2507
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
1 /*
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
2 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
4 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
7 * published by the Free Software Foundation.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
8 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
13 * accompanied this code).
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
14 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
18 *
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
20 * or visit www.oracle.com if you need additional information or have any
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
21 * questions.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
22 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
23 package com.sun.c1x.ir;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
24
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
25 import java.util.*;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
26
2602
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
27 import com.oracle.graal.graph.*;
2507
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
28 import com.sun.c1x.value.*;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
29 import com.sun.cri.ci.*;
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
30
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
31 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
32 * The {@code Switch} class is the base of both lookup and table switches.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
33 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
34 public abstract class Switch extends BlockEnd {
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
35
2602
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
36 private static final int INPUT_COUNT = 1;
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
37 private static final int INPUT_VALUE = 0;
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
38
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
39 private static final int SUCCESSOR_COUNT = 0;
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
40
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
41 @Override
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
42 protected int inputCount() {
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
43 return super.inputCount() + INPUT_COUNT;
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
44 }
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
45
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
46 @Override
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
47 protected int successorCount() {
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
48 return super.successorCount() + SUCCESSOR_COUNT;
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
49 }
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
50
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
51 /**
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
52 * The instruction that provides the input value to this switch.
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
53 */
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
54 public Value value() {
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
55 return (Value) inputs().get(super.inputCount() + INPUT_VALUE);
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
56 }
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
57
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
58 public Value setValue(Value n) {
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
59 return (Value) inputs().set(super.inputCount() + INPUT_VALUE, n);
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
60 }
2507
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
61
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
62 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
63 * Constructs a new Switch.
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
64 * @param value the instruction that provides the value to be switched over
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
65 * @param successors the list of successors of this switch
2741
a3cd5eb68837 more GraphBuilder cleanup, moved mergeOrClone to GraphBuilder
Lukas Stadler <lukas.stadler@jku.at>
parents: 2712
diff changeset
66 * @param stateAfter the state after the switch
2602
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
67 * @param graph
2507
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
68 */
2750
6048da340364 less references to BlockBegin in BlockEnd instructions
Lukas Stadler <lukas.stadler@jku.at>
parents: 2741
diff changeset
69 public Switch(Value value, List<? extends Instruction> successors, FrameState stateAfter, int inputCount, int successorCount, Graph graph) {
2741
a3cd5eb68837 more GraphBuilder cleanup, moved mergeOrClone to GraphBuilder
Lukas Stadler <lukas.stadler@jku.at>
parents: 2712
diff changeset
70 super(CiKind.Illegal, stateAfter, successors, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph);
2602
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
71 setValue(value);
2507
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
72 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
73
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
74 /**
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
75 * Gets the number of cases that this switch covers (excluding the default case).
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
76 * @return the number of cases
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
77 */
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
78 public int numberOfCases() {
2602
0c6564c254af new node layout: BlockBegin, BlockEnd
Lukas Stadler <lukas.stadler@jku.at>
parents: 2509
diff changeset
79 return blockSuccessorCount() - 1;
2507
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
80 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
81
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
diff changeset
82 }