1 /*
2 * Copyright (c) 1997, 2013, 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.
22 *
23 */
24
25 #ifndef SHARE_VM_OPTO_MULTNODE_HPP
26 #define SHARE_VM_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
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.
63 const Type* proj_type(const Type* t) const;
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);
70 // Optimistic setting. Need additional checks in Node::is_dead_loop_safe().
71 if (con != TypeFunc::Memory || src->is_Start())
72 init_flags(Flag_is_dead_loop_safe);
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;
87
88 #ifndef PRODUCT
89 virtual void dump_spec(outputStream *st) const;
90 #endif
91
92 // Return uncommon trap call node if proj is for "proj->[region->..]call_uct"
93 // NULL otherwise
94 CallStaticJavaNode* is_uncommon_trap_proj(Deoptimization::DeoptReason reason);
95 // Return uncommon trap call node for "if(test)-> proj -> ...
96 // |
97 // V
98 // other_proj->[region->..]call_uct"
99 // NULL otherwise
100 CallStaticJavaNode* is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason);
101 };
102
103 #endif // SHARE_VM_OPTO_MULTNODE_HPP