Mercurial > hg > truffle
annotate src/share/vm/opto/multnode.hpp @ 409:218f0fd3ca88
Merge
author | acorn |
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date | Wed, 22 Oct 2008 15:07:23 -0400 |
parents | d1605aabd0a1 |
children | c18cbe5936b8 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
0 | 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); | |
126
72f4a668df19
6625997: CastPP, CheckCastPP and Proj nodes are not dead loop safe
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64 // Optimistic setting. Need additional checks in Node::is_dead_loop_safe(). |
72f4a668df19
6625997: CastPP, CheckCastPP and Proj nodes are not dead loop safe
kvn
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changeset
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65 if (con != TypeFunc::Memory || src->is_Start()) |
72f4a668df19
6625997: CastPP, CheckCastPP and Proj nodes are not dead loop safe
kvn
parents:
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diff
changeset
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66 init_flags(Flag_is_dead_loop_safe); |
0 | 67 debug_only(check_con()); |
68 } | |
69 const uint _con; // The field in the tuple we are projecting | |
70 const bool _is_io_use; // Used to distinguish between the projections | |
71 // used on the control and io paths from a macro node | |
72 virtual int Opcode() const; | |
73 virtual bool is_CFG() const; | |
74 virtual bool depends_only_on_test() const { return false; } | |
75 virtual const Type *bottom_type() const; | |
76 virtual const TypePtr *adr_type() const; | |
77 virtual bool pinned() const; | |
78 virtual const Type *Value( PhaseTransform *phase ) const; | |
79 virtual uint ideal_reg() const; | |
80 virtual const RegMask &out_RegMask() const; | |
81 #ifndef PRODUCT | |
82 virtual void dump_spec(outputStream *st) const; | |
83 #endif | |
84 }; |