01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package EDU.purdue.cs.bloat.tree;
22:
23: import EDU.purdue.cs.bloat.cfg.*;
24:
25: /**
26: * JsrStmt represents a <i>jsr</i> instruction that jumps to a subroutine.
27: * Recall that a subroutine is used to implement the finally cause in exception
28: * handlers. The <i>ret</i> instruction is used to return from a subroutine.
29: *
30: * @see RetStmt
31: * @see Subroutine
32: */
33: public class JsrStmt extends JumpStmt {
34: Subroutine sub; // Subroutine to which to jump
35:
36: Block follow; // Basic Block to execute upon returning
37:
38: // from the subroutine
39:
40: /**
41: * Constructor.
42: *
43: * @param sub
44: * Subroutine that this statement jumps to.
45: * @param follow
46: * Basic Block following the jump statement.
47: */
48: public JsrStmt(final Subroutine sub, final Block follow) {
49: this .sub = sub;
50: this .follow = follow;
51: }
52:
53: public void setFollow(final Block follow) {
54: this .follow = follow;
55: }
56:
57: public Block follow() {
58: return follow;
59: }
60:
61: public Subroutine sub() {
62: return sub;
63: }
64:
65: public void visitForceChildren(final TreeVisitor visitor) {
66: }
67:
68: public void visit(final TreeVisitor visitor) {
69: visitor.visitJsrStmt(this );
70: }
71:
72: public Object clone() {
73: return copyInto(new JsrStmt(sub, follow));
74: }
75: }
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