1 /*
2 * Copyright (c) 1997, 2019, 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.
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23 */
24
25 #ifndef SHARE_OPTO_MULTNODE_HPP
26 #define SHARE_OPTO_MULTNODE_HPP
27
28 #include "opto/node.hpp"
29
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 ProjNode* proj_out_or_null(uint which_proj) const;
51
52 };
53
54 //------------------------------ProjNode---------------------------------------
55 // This class defines a Projection node. Projections project a single element
56 // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple
57 // results.
58 class ProjNode : public Node {
59 protected:
60 virtual uint hash() const;
61 virtual uint cmp( const Node &n ) const;
62 virtual uint size_of() const;
63 void check_con() const; // Called from constructor.
64 const Type* proj_type(const Type* t) const;
65
66 public:
67 ProjNode( Node *src, uint con, bool io_use = false )
68 : Node( src ), _con(con), _is_io_use(io_use)
69 {
70 init_class_id(Class_Proj);
71 // Optimistic setting. Need additional checks in Node::is_dead_loop_safe().
72 if (con != TypeFunc::Memory || src->is_Start())
73 init_flags(Flag_is_dead_loop_safe);
74 debug_only(check_con());
75 }
76 const uint _con; // The field in the tuple we are projecting
77 const bool _is_io_use; // Used to distinguish between the projections
78 // used on the control and io paths from a macro node
79 virtual int Opcode() const;
80 virtual bool is_CFG() const;
81 virtual bool depends_only_on_test() const { return false; }
82 virtual const Type *bottom_type() const;
83 virtual const TypePtr *adr_type() const;
84 virtual bool pinned() const;
85 virtual const Type* Value(PhaseGVN* phase) const;
86 virtual uint ideal_reg() const;
87 virtual const RegMask &out_RegMask() const;
88
89 #ifndef PRODUCT
90 virtual void dump_spec(outputStream *st) const;
91 virtual void dump_compact_spec(outputStream *st) const;
92 #endif
93
94 // Return uncommon trap call node if proj is for "proj->[region->..]call_uct"
95 // NULL otherwise
96 CallStaticJavaNode* is_uncommon_trap_proj(Deoptimization::DeoptReason reason);
97 // Return uncommon trap call node for "if(test)-> proj -> ...
98 // |
99 // V
100 // other_proj->[region->..]call_uct"
101 // NULL otherwise
102 CallStaticJavaNode* is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason);
103
104 // Return other proj node when this is a If proj node
105 ProjNode* other_if_proj() const;
106 };
107
108 #endif // SHARE_OPTO_MULTNODE_HPP