Mercurial > hg > truffle

comparison graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/ir/Unwind.java @ 2874:d90bf514d647

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Renamed packages.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 08 Jun 2011 08:59:54 +0200
parents graal/com.oracle.max.graal.compiler/src/com/sun/c1x/ir/Unwind.java@0341b6424579
children 7b1cdb0e21d9
comparison
equal deleted inserted replaced
2873:810e2d253e00 2874:d90bf514d647
1 /*
2 * Copyright (c) 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.oracle.max.graal.compiler.ir;
24
25 import com.oracle.max.graal.compiler.debug.*;
26 import com.oracle.max.graal.graph.*;
27 import com.sun.cri.ci.*;
28
29 /**
30 * Unwind takes an exception object, destroys the current stack frame and passes the exception object to the system's exception dispatch code.
31 */
32 public final class Unwind extends BlockEnd {
33
34 private static final int INPUT_COUNT = 1;
35 private static final int INPUT_EXCEPTION = 0;
36
37 private static final int SUCCESSOR_COUNT = 0;
38
39 @Override
40 protected int inputCount() {
41 return super.inputCount() + INPUT_COUNT;
42 }
43
44 @Override
45 protected int successorCount() {
46 return super.successorCount() + SUCCESSOR_COUNT;
47 }
48
49 @Override
50 public Instruction next() {
51 return null;
52 }
53
54 /**
55 * The instruction that produces the exception object.
56 */
57 public Value exception() {
58 return (Value) inputs().get(super.inputCount() + INPUT_EXCEPTION);
59 }
60
61 public Value setException(Value n) {
62 assert n == null || n.kind == CiKind.Object;
63 return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n);
64 }
65
66 public Unwind(Value exception, Graph graph) {
67 super(CiKind.Object, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph);
68 setException(exception);
69 }
70
71 @Override
72 public void accept(ValueVisitor v) {
73 v.visitUnwind(this);
74 }
75
76 @Override
77 public void print(LogStream out) {
78 out.print(kind.typeChar).print("unwind ").print(exception());
79 }
80
81 @Override
82 public Node copy(Graph into) {
83 Unwind x = new Unwind(null, into);
84 return x;
85 }
86 }