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757bf1df DM |
1 | /* A state machine for use in DejaGnu tests, to check that |
2 | pattern-matching works as expected. | |
3 | ||
a945c346 | 4 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
757bf1df DM |
5 | Contributed by David Malcolm <dmalcolm@redhat.com>. |
6 | ||
7 | This file is part of GCC. | |
8 | ||
9 | GCC is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3, or (at your option) | |
12 | any later version. | |
13 | ||
14 | GCC is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with GCC; see the file COPYING3. If not see | |
21 | <http://www.gnu.org/licenses/>. */ | |
22 | ||
23 | #include "config.h" | |
6341f14e | 24 | #define INCLUDE_MEMORY |
757bf1df DM |
25 | #include "system.h" |
26 | #include "coretypes.h" | |
6341f14e | 27 | #include "make-unique.h" |
757bf1df DM |
28 | #include "tree.h" |
29 | #include "function.h" | |
30 | #include "basic-block.h" | |
31 | #include "gimple.h" | |
32 | #include "tree-pretty-print.h" | |
33 | #include "diagnostic-path.h" | |
757bf1df DM |
34 | #include "analyzer/analyzer.h" |
35 | #include "diagnostic-event-id.h" | |
36 | #include "analyzer/analyzer-logging.h" | |
37 | #include "analyzer/sm.h" | |
38 | #include "analyzer/pending-diagnostic.h" | |
48e8a7a6 DM |
39 | #include "analyzer/call-string.h" |
40 | #include "analyzer/program-point.h" | |
41 | #include "analyzer/store.h" | |
42 | #include "analyzer/region-model.h" | |
757bf1df DM |
43 | |
44 | #if ENABLE_ANALYZER | |
45 | ||
75038aa6 DM |
46 | namespace ana { |
47 | ||
757bf1df DM |
48 | namespace { |
49 | ||
50 | /* A state machine for use in DejaGnu tests, to check that | |
51 | pattern-matching works as expected. */ | |
52 | ||
53 | class pattern_test_state_machine : public state_machine | |
54 | { | |
55 | public: | |
56 | pattern_test_state_machine (logger *logger); | |
57 | ||
ff171cb1 | 58 | bool inherited_state_p () const final override { return false; } |
757bf1df DM |
59 | |
60 | bool on_stmt (sm_context *sm_ctxt, | |
61 | const supernode *node, | |
ff171cb1 | 62 | const gimple *stmt) const final override; |
757bf1df DM |
63 | |
64 | void on_condition (sm_context *sm_ctxt, | |
65 | const supernode *node, | |
66 | const gimple *stmt, | |
48e8a7a6 | 67 | const svalue *lhs, |
757bf1df | 68 | enum tree_code op, |
ff171cb1 | 69 | const svalue *rhs) const final override; |
757bf1df | 70 | |
ff171cb1 | 71 | bool can_purge_p (state_t s) const final override; |
757bf1df DM |
72 | }; |
73 | ||
74 | class pattern_match : public pending_diagnostic_subclass<pattern_match> | |
75 | { | |
76 | public: | |
77 | pattern_match (tree lhs, enum tree_code op, tree rhs) | |
78 | : m_lhs (lhs), m_op (op), m_rhs (rhs) {} | |
79 | ||
ff171cb1 | 80 | const char *get_kind () const final override { return "pattern_match"; } |
757bf1df DM |
81 | |
82 | bool operator== (const pattern_match &other) const | |
83 | { | |
14f9d7b9 | 84 | return (same_tree_p (m_lhs, other.m_lhs) |
757bf1df | 85 | && m_op == other.m_op |
14f9d7b9 | 86 | && same_tree_p (m_rhs, other.m_rhs)); |
757bf1df DM |
87 | } |
88 | ||
ff171cb1 | 89 | int get_controlling_option () const final override |
7fd6e36e DM |
90 | { |
91 | return 0; | |
92 | } | |
93 | ||
12b67d1e | 94 | bool emit (diagnostic_emission_context &ctxt) final override |
757bf1df | 95 | { |
12b67d1e DM |
96 | return ctxt.warn ("pattern match on %<%E %s %E%>", |
97 | m_lhs, op_symbol_code (m_op), m_rhs); | |
757bf1df DM |
98 | } |
99 | ||
100 | private: | |
101 | tree m_lhs; | |
102 | enum tree_code m_op; | |
103 | tree m_rhs; | |
104 | }; | |
105 | ||
106 | pattern_test_state_machine::pattern_test_state_machine (logger *logger) | |
107 | : state_machine ("pattern-test", logger) | |
108 | { | |
757bf1df DM |
109 | } |
110 | ||
111 | bool | |
112 | pattern_test_state_machine::on_stmt (sm_context *sm_ctxt ATTRIBUTE_UNUSED, | |
113 | const supernode *node ATTRIBUTE_UNUSED, | |
114 | const gimple *stmt ATTRIBUTE_UNUSED) const | |
115 | { | |
116 | return false; | |
117 | } | |
118 | ||
119 | /* Implementation of state_machine::on_condition vfunc for | |
120 | pattern_test_state_machine. | |
121 | ||
122 | Queue a pattern_match diagnostic for any comparison against a | |
123 | constant. */ | |
124 | ||
125 | void | |
126 | pattern_test_state_machine::on_condition (sm_context *sm_ctxt, | |
127 | const supernode *node, | |
128 | const gimple *stmt, | |
48e8a7a6 | 129 | const svalue *lhs, |
757bf1df | 130 | enum tree_code op, |
48e8a7a6 | 131 | const svalue *rhs) const |
757bf1df DM |
132 | { |
133 | if (stmt == NULL) | |
134 | return; | |
135 | ||
48e8a7a6 DM |
136 | tree rhs_cst = rhs->maybe_get_constant (); |
137 | if (!rhs_cst) | |
757bf1df DM |
138 | return; |
139 | ||
48e8a7a6 DM |
140 | if (tree lhs_expr = sm_ctxt->get_diagnostic_tree (lhs)) |
141 | { | |
6341f14e DM |
142 | sm_ctxt->warn (node, stmt, lhs_expr, |
143 | make_unique<pattern_match> (lhs_expr, op, rhs_cst)); | |
48e8a7a6 | 144 | } |
757bf1df DM |
145 | } |
146 | ||
147 | bool | |
148 | pattern_test_state_machine::can_purge_p (state_t s ATTRIBUTE_UNUSED) const | |
149 | { | |
150 | return true; | |
151 | } | |
152 | ||
153 | } // anonymous namespace | |
154 | ||
155 | /* Internal interface to this file. */ | |
156 | ||
157 | state_machine * | |
158 | make_pattern_test_state_machine (logger *logger) | |
159 | { | |
160 | return new pattern_test_state_machine (logger); | |
161 | } | |
162 | ||
75038aa6 DM |
163 | } // namespace ana |
164 | ||
757bf1df | 165 | #endif /* #if ENABLE_ANALYZER */ |