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comparison graal/GraalCompiler/src/com/sun/c1x/ir/Throw.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/Throw.java@9ec15d6914ca
children 0c6564c254af
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 com.sun.c1x.debug.*;
26 import com.sun.c1x.value.*;
27 import com.sun.cri.ci.*;
28
29 /**
30 * The {@code Throw} instruction represents a throw of an exception.
31 *
32 * @author Ben L. Titzer
33 */
34 public final class Throw extends BlockEnd {
35
36 Value exception;
37
38 FrameState stateBefore;
39
40 /**
41 * Creates a new Throw instruction.
42 * @param exception the instruction that generates the exception to throw
43 * @param stateAfter the state before the exception is thrown but after the exception object has been popped
44 * @param isSafepoint {@code true} if this instruction is a safepoint instruction
45 */
46 public Throw(Value exception, FrameState stateAfter, boolean isSafepoint) {
47 super(CiKind.Illegal, null, isSafepoint);
48 this.stateBefore = stateAfter;
49 this.exception = exception;
50 }
51
52 /**
53 * Gets the instruction which produces the exception to throw.
54 * @return the instruction producing the exception
55 */
56 public Value exception() {
57 return exception;
58 }
59
60 /**
61 * Returns the state before this throw would occur.
62 * @return the state before the throw
63 */
64 @Override
65 public FrameState stateBefore() {
66 return stateBefore;
67 }
68
69 /**
70 * Checks whether this instruction can trap.
71 * @return {@code true} because this instruction definitely throws an exception!
72 */
73 @Override
74 public boolean canTrap() {
75 return true;
76 }
77
78 @Override
79 public void inputValuesDo(ValueClosure closure) {
80 exception = closure.apply(exception);
81 }
82
83 @Override
84 public void accept(ValueVisitor v) {
85 v.visitThrow(this);
86 }
87
88 @Override
89 public void print(LogStream out) {
90 out.print("throw ").print(exception());
91 }
92 }