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1 : : /* Measuring the complexity of svalues/regions.
2 : : Copyright (C) 2020-2024 Free Software Foundation, Inc.
3 : : Contributed by David Malcolm <dmalcolm@redhat.com>.
4 : :
5 : : This file is part of GCC.
6 : :
7 : : GCC is free software; you can redistribute it and/or modify it
8 : : under the terms of the GNU General Public License as published by
9 : : the Free Software Foundation; either version 3, or (at your option)
10 : : any later version.
11 : :
12 : : GCC is distributed in the hope that it will be useful, but
13 : : WITHOUT ANY WARRANTY; without even the implied warranty of
14 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 : : General Public License for more details.
16 : :
17 : : You should have received a copy of the GNU General Public License
18 : : along with GCC; see the file COPYING3. If not see
19 : : <http://www.gnu.org/licenses/>. */
20 : :
21 : : #include "config.h"
22 : : #define INCLUDE_MEMORY
23 : : #include "system.h"
24 : : #include "coretypes.h"
25 : : #include "tree.h"
26 : : #include "diagnostic-core.h"
27 : : #include "gimple-pretty-print.h"
28 : : #include "function.h"
29 : : #include "basic-block.h"
30 : : #include "gimple.h"
31 : : #include "gimple-iterator.h"
32 : : #include "diagnostic-core.h"
33 : : #include "graphviz.h"
34 : : #include "options.h"
35 : : #include "cgraph.h"
36 : : #include "tree-dfa.h"
37 : : #include "stringpool.h"
38 : : #include "convert.h"
39 : : #include "target.h"
40 : : #include "fold-const.h"
41 : : #include "tree-pretty-print.h"
42 : : #include "bitmap.h"
43 : : #include "analyzer/analyzer.h"
44 : : #include "analyzer/analyzer-logging.h"
45 : : #include "options.h"
46 : : #include "cgraph.h"
47 : : #include "cfg.h"
48 : : #include "digraph.h"
49 : : #include "analyzer/call-string.h"
50 : : #include "analyzer/program-point.h"
51 : : #include "analyzer/store.h"
52 : : #include "analyzer/complexity.h"
53 : : #include "analyzer/svalue.h"
54 : : #include "analyzer/region.h"
55 : :
56 : : #if ENABLE_ANALYZER
57 : :
58 : : namespace ana {
59 : :
60 : : /* struct complexity. */
61 : :
62 : : /* Get complexity for a new node that references REG
63 : : (the complexity of REG, plus one for the new node). */
64 : :
65 : 292473 : complexity::complexity (const region *reg)
66 : 292473 : : m_num_nodes (reg->get_complexity ().m_num_nodes + 1),
67 : 292473 : m_max_depth (reg->get_complexity ().m_max_depth + 1)
68 : : {
69 : 292473 : }
70 : :
71 : : /* Get complexity for a new node that references SVAL.
72 : : (the complexity of SVAL, plus one for the new node). */
73 : :
74 : 34055 : complexity::complexity (const svalue *sval)
75 : 34055 : : m_num_nodes (sval->get_complexity ().m_num_nodes + 1),
76 : 34055 : m_max_depth (sval->get_complexity ().m_max_depth + 1)
77 : : {
78 : 34055 : }
79 : :
80 : : /* Get complexity for a new node that references nodes with complexity
81 : : C1 and C2. */
82 : :
83 : : complexity
84 : 53046 : complexity::from_pair (const complexity &c1, const complexity &c2)
85 : : {
86 : 53046 : return complexity (c1.m_num_nodes + c2.m_num_nodes + 1,
87 : 53046 : MAX (c1.m_max_depth, c2.m_max_depth) + 1);
88 : : }
89 : :
90 : : /* Get complexity for a new node that references the svalues in VEC. */
91 : :
92 : : complexity
93 : 494 : complexity::from_vec_svalue (const vec<const svalue *> &vec)
94 : : {
95 : 494 : unsigned num_nodes = 0;
96 : 494 : unsigned max_depth = 0;
97 : 1940 : for (auto iter_sval : vec)
98 : : {
99 : 590 : const complexity &iter_c = iter_sval->get_complexity ();
100 : 590 : num_nodes += iter_c.m_num_nodes;
101 : 590 : max_depth = MAX (max_depth, iter_c.m_max_depth);
102 : : }
103 : 494 : return complexity (num_nodes + 1, max_depth + 1);
104 : : }
105 : :
106 : : } // namespace ana
107 : :
108 : : #endif /* #if ENABLE_ANALYZER */
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