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comparison graal/com.oracle.max.graal.compiler/src/com/sun/c1x/ir/ExceptionDispatch.java @ 2872:0341b6424579

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Project renaming.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 08 Jun 2011 08:42:25 +0200
parents graal/GraalCompiler/src/com/sun/c1x/ir/ExceptionDispatch.java@14708c03abba
children
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2871:d704eb526603 2872:0341b6424579
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 com.oracle.graal.graph.*;
26 import com.sun.c1x.debug.*;
27 import com.sun.cri.ci.*;
28 import com.sun.cri.ri.*;
29
30 /**
31 * This instruction takes an exception object and has two successors:
32 * The catchSuccessor is called whenever the exception matches the given type, otherwise otherSuccessor is called.
33 */
34 public final class ExceptionDispatch extends BlockEnd {
35
36 private static final int INPUT_COUNT = 1;
37 private static final int INPUT_EXCEPTION = 0;
38
39 private static final int SUCCESSOR_COUNT = 0;
40
41 @Override
42 protected int inputCount() {
43 return super.inputCount() + INPUT_COUNT;
44 }
45
46 @Override
47 protected int successorCount() {
48 return super.successorCount() + SUCCESSOR_COUNT;
49 }
50
51 /**
52 * The instruction producing the exception object.
53 */
54 public Value exception() {
55 return (Value) inputs().get(super.inputCount() + INPUT_EXCEPTION);
56 }
57
58 public Value setException(Value n) {
59 return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n);
60 }
61
62 private final RiType catchType;
63
64 /**
65 * Constructs a new ExceptionDispatch instruction.
66 */
67 public ExceptionDispatch(Value exception, Instruction catchSuccessor, Instruction otherSuccessor, RiType catchType, Graph graph) {
68 super(CiKind.Int, 2, INPUT_COUNT, SUCCESSOR_COUNT, graph);
69 setException(exception);
70 setBlockSuccessor(0, otherSuccessor);
71 setBlockSuccessor(1, catchSuccessor);
72 this.catchType = catchType;
73 }
74
75 public RiType catchType() {
76 return catchType;
77 }
78
79 /**
80 * Gets the block corresponding to the catch block.
81 * @return the true successor
82 */
83 public Instruction catchSuccessor() {
84 return blockSuccessor(1);
85 }
86
87 /**
88 * Gets the block corresponding to the rest of the dispatch chain.
89 * @return the false successor
90 */
91 public Instruction otherSuccessor() {
92 return blockSuccessor(0);
93 }
94
95 /**
96 * Gets the block corresponding to the specified outcome of the branch.
97 * @param istrue {@code true} if the true successor is requested, {@code false} otherwise
98 * @return the corresponding successor
99 */
100 public Instruction successor(boolean istrue) {
101 return blockSuccessor(istrue ? 1 : 0);
102 }
103
104 @Override
105 public void accept(ValueVisitor v) {
106 v.visitExceptionDispatch(this);
107 }
108
109 @Override
110 public void print(LogStream out) {
111 out.print("exception_dispatch ").
112 print(exception()).
113 print(' ').
114 print("instanceof").
115 print(' ').
116 print(catchType().name()).
117 print(" then ").
118 print(blockSuccessors().get(1).toString()).
119 print(" else B").
120 print(blockSuccessors().get(0).toString());
121 }
122
123 @Override
124 public String shortName() {
125 return "Dispatch " + catchType().name();
126 }
127
128 @Override
129 public Node copy(Graph into) {
130 ExceptionDispatch x = new ExceptionDispatch(null, null, null, catchType, into);
131 return x;
132 }
133 }