Mercurial > hg > truffle
annotate src/share/vm/opto/multnode.hpp @ 14714:b602356a9cfc
additional canonicalizers for accesses and value nodes (improves number of implicit null checks)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 20 Mar 2014 17:15:36 +0100 |
parents | de6a9e811145 |
children | 4ca6dc0799b6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OPTO_MULTNODE_HPP |
26 #define SHARE_VM_OPTO_MULTNODE_HPP | |
27 | |
28 #include "opto/node.hpp" | |
29 | |
0 | 30 class Matcher; |
31 class ProjNode; | |
32 | |
33 //------------------------------MultiNode-------------------------------------- | |
34 // This class defines a MultiNode, a Node which produces many values. The | |
35 // values are wrapped up in a tuple Type, i.e. a TypeTuple. | |
36 class MultiNode : public Node { | |
37 public: | |
38 MultiNode( uint required ) : Node(required) { | |
39 init_class_id(Class_Multi); | |
40 } | |
41 virtual int Opcode() const; | |
42 virtual const Type *bottom_type() const = 0; | |
43 virtual bool is_CFG() const { return true; } | |
44 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash | |
45 virtual bool depends_only_on_test() const { return false; } | |
46 virtual const RegMask &out_RegMask() const; | |
47 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
48 virtual uint ideal_reg() const { return NotAMachineReg; } | |
49 ProjNode* proj_out(uint which_proj) const; // Get a named projection | |
50 | |
51 }; | |
52 | |
53 //------------------------------ProjNode--------------------------------------- | |
54 // This class defines a Projection node. Projections project a single element | |
55 // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple | |
56 // results. | |
57 class ProjNode : public Node { | |
58 protected: | |
59 virtual uint hash() const; | |
60 virtual uint cmp( const Node &n ) const; | |
61 virtual uint size_of() const; | |
62 void check_con() const; // Called from constructor. | |
10278 | 63 const Type* proj_type(const Type* t) const; |
0 | 64 |
65 public: | |
66 ProjNode( Node *src, uint con, bool io_use = false ) | |
67 : Node( src ), _con(con), _is_io_use(io_use) | |
68 { | |
69 init_class_id(Class_Proj); | |
126
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70 // Optimistic setting. Need additional checks in Node::is_dead_loop_safe(). |
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71 if (con != TypeFunc::Memory || src->is_Start()) |
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72 init_flags(Flag_is_dead_loop_safe); |
0 | 73 debug_only(check_con()); |
74 } | |
75 const uint _con; // The field in the tuple we are projecting | |
76 const bool _is_io_use; // Used to distinguish between the projections | |
77 // used on the control and io paths from a macro node | |
78 virtual int Opcode() const; | |
79 virtual bool is_CFG() const; | |
80 virtual bool depends_only_on_test() const { return false; } | |
81 virtual const Type *bottom_type() const; | |
82 virtual const TypePtr *adr_type() const; | |
83 virtual bool pinned() const; | |
84 virtual const Type *Value( PhaseTransform *phase ) const; | |
85 virtual uint ideal_reg() const; | |
86 virtual const RegMask &out_RegMask() const; | |
10278 | 87 |
0 | 88 #ifndef PRODUCT |
89 virtual void dump_spec(outputStream *st) const; | |
90 #endif | |
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91 |
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92 // Return true if proj is for "proj->[region->..]call_uct" |
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93 bool is_uncommon_trap_proj(Deoptimization::DeoptReason reason); |
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94 // Return true for "if(test)-> proj -> ... |
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95 // | |
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96 // V |
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97 // other_proj->[region->..]call_uct" |
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98 bool is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason); |
0 | 99 }; |
1972 | 100 |
101 #endif // SHARE_VM_OPTO_MULTNODE_HPP |