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1 : : /* Header file for the GIMPLE fold_using_range interface.
2 : : Copyright (C) 2019-2024 Free Software Foundation, Inc.
3 : : Contributed by Andrew MacLeod <amacleod@redhat.com>
4 : : and Aldy Hernandez <aldyh@redhat.com>.
5 : :
6 : : This file is part of GCC.
7 : :
8 : : GCC is free software; you can redistribute it and/or modify it under
9 : : the terms of the GNU General Public License as published by the Free
10 : : Software Foundation; either version 3, or (at your option) any later
11 : : version.
12 : :
13 : : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 : : WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 : : FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 : : for more details.
17 : :
18 : : You should have received a copy of the GNU General Public License
19 : : along with GCC; see the file COPYING3. If not see
20 : : <http://www.gnu.org/licenses/>. */
21 : :
22 : : #ifndef GCC_GIMPLE_RANGE_FOLD_H
23 : : #define GCC_GIMPLE_RANGE_FOLD_H
24 : :
25 : : // This file is the main include point for gimple range folding.
26 : : // These routines will fold stmt S into the result range R.
27 : : // Any ssa_names on the stmt will be calculated using the range_query
28 : : // parameter via a call to range_of_expr.
29 : : // If no range_query is provided, current global range info will be used.
30 : : // The second variation specifies an edge, and stmt S is recalculated as if
31 : : // it appeared on that edge.
32 : :
33 : : // Fold stmt S into range R using range query Q.
34 : : bool fold_range (vrange &r, gimple *s, range_query *q = NULL);
35 : : // Recalculate stmt S into R using range query Q as if it were on edge ON_EDGE.
36 : : bool fold_range (vrange &v, gimple *s, edge on_edge, range_query *q = NULL);
37 : :
38 : : // These routines the operands to be specified when manually folding.
39 : : // Any excess queries will be drawn from the current range_query.
40 : : bool fold_range (vrange &r, gimple *s, vrange &r1, range_query *q = NULL);
41 : : bool fold_range (vrange &r, gimple *s, vrange &r1, vrange &r2,
42 : : range_query *q = NULL);
43 : : bool fold_range (vrange &r, gimple *s, unsigned num_elements, vrange **vector,
44 : : range_query *q = NULL);
45 : :
46 : : // Calculate op1 on stmt S.
47 : : bool op1_range (vrange &, gimple *s, range_query *q = NULL);
48 : : bool op1_range (vrange &, gimple *s, const vrange &lhs, range_query *q = NULL);
49 : : // Calculate op2 on stmt S.
50 : : bool op2_range (vrange &, gimple *s, range_query *q = NULL);
51 : : bool op2_range (vrange &, gimple *s, const vrange &lhs, range_query *q = NULL);
52 : :
53 : : // This routine will return a relation trio for stmt S.
54 : : relation_trio fold_relations (gimple *s, range_query *q = NULL);
55 : :
56 : : // Return the type of range which statement S calculates. If the type is
57 : : // unsupported or no type can be determined, return NULL_TREE.
58 : :
59 : : inline tree
60 : 426268281 : gimple_range_type (const gimple *s)
61 : : {
62 : 426268281 : tree lhs = gimple_get_lhs (s);
63 : 426268281 : tree type = NULL_TREE;
64 : 426268281 : if (lhs)
65 : 292243212 : type = TREE_TYPE (lhs);
66 : : else
67 : : {
68 : 134025069 : enum gimple_code code = gimple_code (s);
69 : 134025069 : if (code == GIMPLE_COND)
70 : 133268540 : type = boolean_type_node;
71 : 756529 : else if (code == GIMPLE_PHI)
72 : 0 : type = TREE_TYPE (gimple_phi_result (s));
73 : 756529 : else if (code == GIMPLE_CALL)
74 : : {
75 : 15 : type = gimple_call_fntype (s);
76 : : // If it has a type, get the return type.
77 : 15 : if (type)
78 : 15 : type = TREE_TYPE (type);
79 : : }
80 : : }
81 : 425511767 : if (type && value_range::supports_type_p (type))
82 : : return type;
83 : : return NULL_TREE;
84 : : }
85 : :
86 : : // Return EXP if it is an SSA_NAME with a type supported by gimple ranges.
87 : :
88 : : inline tree
89 : 4208008274 : gimple_range_ssa_p (tree exp)
90 : : {
91 : 4152729718 : if (exp && TREE_CODE (exp) == SSA_NAME &&
92 : 3533886963 : !SSA_NAME_IS_VIRTUAL_OPERAND (exp) &&
93 : 11204759950 : !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (exp) &&
94 : 3498325702 : value_range::supports_type_p (TREE_TYPE (exp)))
95 : : return exp;
96 : : return NULL_TREE;
97 : : }
98 : :
99 : : // Source of all operands for fold_using_range and gori_compute.
100 : : // It abstracts out the source of an operand so it can come from a stmt or
101 : : // and edge or anywhere a derived class of fur_source wants.
102 : : // The default simply picks up ranges from the current range_query.
103 : :
104 : : class fur_source
105 : : {
106 : : public:
107 : : fur_source (range_query *q = NULL);
108 : 30695951 : inline range_query *query () const { return m_query; }
109 : 248322094 : inline gori_map *gori_ssa () const
110 : 198483432 : { return (m_depend_p && m_query) ? m_query->gori_ssa () : NULL; }
111 : 115850508 : inline class gimple_outgoing_range *gori ()
112 : 115850508 : { return m_depend_p ? &(m_query->gori ()) : NULL; }
113 : : virtual bool get_operand (vrange &r, tree expr);
114 : : virtual bool get_phi_operand (vrange &r, tree expr, edge e);
115 : : virtual relation_kind query_relation (tree op1, tree op2);
116 : : virtual void register_relation (gimple *stmt, relation_kind k, tree op1,
117 : : tree op2);
118 : : virtual void register_relation (edge e, relation_kind k, tree op1,
119 : : tree op2);
120 : : void register_outgoing_edges (gcond *, irange &lhs_range, edge e0, edge e1);
121 : : protected:
122 : : range_query *m_query;
123 : : bool m_depend_p;
124 : : };
125 : :
126 : : // fur_stmt is the specification for drawing an operand from range_query Q
127 : : // via a range_of_Expr call on stmt S.
128 : :
129 : : class fur_stmt : public fur_source
130 : : {
131 : : public:
132 : : fur_stmt (gimple *s, range_query *q = NULL);
133 : : virtual bool get_operand (vrange &r, tree expr) override;
134 : : virtual bool get_phi_operand (vrange &r, tree expr, edge e) override;
135 : : virtual relation_kind query_relation (tree op1, tree op2) override;
136 : : private:
137 : : gimple *m_stmt;
138 : : };
139 : :
140 : : // This version of fur_source will pick a range from a stmt, and also register
141 : : // dependencies via a gori_compute object. This is mostly an internal API.
142 : :
143 : : class fur_depend : public fur_stmt
144 : : {
145 : : public:
146 : : fur_depend (gimple *s, range_query *q = NULL);
147 : : virtual void register_relation (gimple *stmt, relation_kind k, tree op1,
148 : : tree op2) override;
149 : : virtual void register_relation (edge e, relation_kind k, tree op1,
150 : : tree op2) override;
151 : : };
152 : :
153 : :
154 : : // This version of fur_source will pick a range up off an edge.
155 : :
156 : : class fur_edge : public fur_source
157 : : {
158 : : public:
159 : 52962251 : fur_edge (edge e, range_query *q = NULL) : fur_source (q)
160 : 52962251 : { m_edge = e; }
161 : : virtual bool get_operand (vrange &r, tree expr) override;
162 : : virtual bool get_phi_operand (vrange &r, tree expr, edge e) override;
163 : : private:
164 : : edge m_edge;
165 : : };
166 : :
167 : : // This class uses ranges to fold a gimple statement producing a range for
168 : : // the LHS. The source of all operands is supplied via the fur_source class
169 : : // which provides a range_query as well as a source location and any other
170 : : // required information.
171 : :
172 : : class fold_using_range
173 : : {
174 : : public:
175 : : bool fold_stmt (vrange &r, gimple *s, class fur_source &src,
176 : : tree name = NULL_TREE);
177 : : protected:
178 : : bool range_of_range_op (vrange &r, gimple_range_op_handler &handler,
179 : : fur_source &src);
180 : : bool range_of_call (vrange &r, gcall *call, fur_source &src);
181 : : bool range_of_cond_expr (vrange &r, gassign* cond, fur_source &src);
182 : : bool range_of_address (prange &r, gimple *s, fur_source &src);
183 : : bool range_of_phi (vrange &r, gphi *phi, fur_source &src);
184 : : void range_of_ssa_name_with_loop_info (vrange &, tree, class loop *, gphi *,
185 : : fur_source &src);
186 : : void relation_fold_and_or (irange& lhs_range, gimple *s, fur_source &src,
187 : : vrange &op1, vrange &op2);
188 : : bool condexpr_adjust (vrange &r1, vrange &r2, gimple *, tree cond, tree op1,
189 : : tree op2, fur_source &src);
190 : : };
191 : : #endif // GCC_GIMPLE_RANGE_FOLD_H
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