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comparison src/share/vm/opto/multnode.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children 72f4a668df19
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1997-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 class Matcher;
26 class ProjNode;
27
28 //------------------------------MultiNode--------------------------------------
29 // This class defines a MultiNode, a Node which produces many values. The
30 // values are wrapped up in a tuple Type, i.e. a TypeTuple.
31 class MultiNode : public Node {
32 public:
33 MultiNode( uint required ) : Node(required) {
34 init_class_id(Class_Multi);
35 }
36 virtual int Opcode() const;
37 virtual const Type *bottom_type() const = 0;
38 virtual bool is_CFG() const { return true; }
39 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
40 virtual bool depends_only_on_test() const { return false; }
41 virtual const RegMask &out_RegMask() const;
42 virtual Node *match( const ProjNode *proj, const Matcher *m );
43 virtual uint ideal_reg() const { return NotAMachineReg; }
44 ProjNode* proj_out(uint which_proj) const; // Get a named projection
45
46 };
47
48 //------------------------------ProjNode---------------------------------------
49 // This class defines a Projection node. Projections project a single element
50 // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple
51 // results.
52 class ProjNode : public Node {
53 protected:
54 virtual uint hash() const;
55 virtual uint cmp( const Node &n ) const;
56 virtual uint size_of() const;
57 void check_con() const; // Called from constructor.
58
59 public:
60 ProjNode( Node *src, uint con, bool io_use = false )
61 : Node( src ), _con(con), _is_io_use(io_use)
62 {
63 init_class_id(Class_Proj);
64 debug_only(check_con());
65 }
66 const uint _con; // The field in the tuple we are projecting
67 const bool _is_io_use; // Used to distinguish between the projections
68 // used on the control and io paths from a macro node
69 virtual int Opcode() const;
70 virtual bool is_CFG() const;
71 virtual bool depends_only_on_test() const { return false; }
72 virtual const Type *bottom_type() const;
73 virtual const TypePtr *adr_type() const;
74 virtual bool pinned() const;
75 virtual const Type *Value( PhaseTransform *phase ) const;
76 virtual uint ideal_reg() const;
77 virtual const RegMask &out_RegMask() const;
78 #ifndef PRODUCT
79 virtual void dump_spec(outputStream *st) const;
80 #endif
81 };