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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 | ||
7adcbafe | 4 | Copyright (C) 2019-2022 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" | |
24 | #include "system.h" | |
25 | #include "coretypes.h" | |
26 | #include "tree.h" | |
27 | #include "function.h" | |
28 | #include "basic-block.h" | |
29 | #include "gimple.h" | |
30 | #include "tree-pretty-print.h" | |
31 | #include "diagnostic-path.h" | |
32 | #include "diagnostic-metadata.h" | |
33 | #include "function.h" | |
809192e7 | 34 | #include "json.h" |
757bf1df DM |
35 | #include "analyzer/analyzer.h" |
36 | #include "diagnostic-event-id.h" | |
37 | #include "analyzer/analyzer-logging.h" | |
38 | #include "analyzer/sm.h" | |
39 | #include "analyzer/pending-diagnostic.h" | |
48e8a7a6 DM |
40 | #include "tristate.h" |
41 | #include "selftest.h" | |
42 | #include "analyzer/call-string.h" | |
43 | #include "analyzer/program-point.h" | |
44 | #include "analyzer/store.h" | |
45 | #include "analyzer/region-model.h" | |
757bf1df DM |
46 | |
47 | #if ENABLE_ANALYZER | |
48 | ||
75038aa6 DM |
49 | namespace ana { |
50 | ||
757bf1df DM |
51 | namespace { |
52 | ||
53 | /* A state machine for use in DejaGnu tests, to check that | |
54 | pattern-matching works as expected. */ | |
55 | ||
56 | class pattern_test_state_machine : public state_machine | |
57 | { | |
58 | public: | |
59 | pattern_test_state_machine (logger *logger); | |
60 | ||
61 | bool inherited_state_p () const FINAL OVERRIDE { return false; } | |
62 | ||
63 | bool on_stmt (sm_context *sm_ctxt, | |
64 | const supernode *node, | |
65 | const gimple *stmt) const FINAL OVERRIDE; | |
66 | ||
67 | void on_condition (sm_context *sm_ctxt, | |
68 | const supernode *node, | |
69 | const gimple *stmt, | |
48e8a7a6 | 70 | const svalue *lhs, |
757bf1df | 71 | enum tree_code op, |
48e8a7a6 | 72 | const svalue *rhs) const FINAL OVERRIDE; |
757bf1df DM |
73 | |
74 | bool can_purge_p (state_t s) const FINAL OVERRIDE; | |
757bf1df DM |
75 | }; |
76 | ||
77 | class pattern_match : public pending_diagnostic_subclass<pattern_match> | |
78 | { | |
79 | public: | |
80 | pattern_match (tree lhs, enum tree_code op, tree rhs) | |
81 | : m_lhs (lhs), m_op (op), m_rhs (rhs) {} | |
82 | ||
83 | const char *get_kind () const FINAL OVERRIDE { return "pattern_match"; } | |
84 | ||
85 | bool operator== (const pattern_match &other) const | |
86 | { | |
14f9d7b9 | 87 | return (same_tree_p (m_lhs, other.m_lhs) |
757bf1df | 88 | && m_op == other.m_op |
14f9d7b9 | 89 | && same_tree_p (m_rhs, other.m_rhs)); |
757bf1df DM |
90 | } |
91 | ||
7fd6e36e DM |
92 | int get_controlling_option () const FINAL OVERRIDE |
93 | { | |
94 | return 0; | |
95 | } | |
96 | ||
757bf1df DM |
97 | bool emit (rich_location *rich_loc) FINAL OVERRIDE |
98 | { | |
7fd6e36e DM |
99 | return warning_at (rich_loc, get_controlling_option (), |
100 | "pattern match on %<%E %s %E%>", | |
757bf1df DM |
101 | m_lhs, op_symbol_code (m_op), m_rhs); |
102 | } | |
103 | ||
104 | private: | |
105 | tree m_lhs; | |
106 | enum tree_code m_op; | |
107 | tree m_rhs; | |
108 | }; | |
109 | ||
110 | pattern_test_state_machine::pattern_test_state_machine (logger *logger) | |
111 | : state_machine ("pattern-test", logger) | |
112 | { | |
757bf1df DM |
113 | } |
114 | ||
115 | bool | |
116 | pattern_test_state_machine::on_stmt (sm_context *sm_ctxt ATTRIBUTE_UNUSED, | |
117 | const supernode *node ATTRIBUTE_UNUSED, | |
118 | const gimple *stmt ATTRIBUTE_UNUSED) const | |
119 | { | |
120 | return false; | |
121 | } | |
122 | ||
123 | /* Implementation of state_machine::on_condition vfunc for | |
124 | pattern_test_state_machine. | |
125 | ||
126 | Queue a pattern_match diagnostic for any comparison against a | |
127 | constant. */ | |
128 | ||
129 | void | |
130 | pattern_test_state_machine::on_condition (sm_context *sm_ctxt, | |
131 | const supernode *node, | |
132 | const gimple *stmt, | |
48e8a7a6 | 133 | const svalue *lhs, |
757bf1df | 134 | enum tree_code op, |
48e8a7a6 | 135 | const svalue *rhs) const |
757bf1df DM |
136 | { |
137 | if (stmt == NULL) | |
138 | return; | |
139 | ||
48e8a7a6 DM |
140 | tree rhs_cst = rhs->maybe_get_constant (); |
141 | if (!rhs_cst) | |
757bf1df DM |
142 | return; |
143 | ||
48e8a7a6 DM |
144 | if (tree lhs_expr = sm_ctxt->get_diagnostic_tree (lhs)) |
145 | { | |
146 | pending_diagnostic *diag = new pattern_match (lhs_expr, op, rhs_cst); | |
147 | sm_ctxt->warn (node, stmt, lhs_expr, diag); | |
148 | } | |
757bf1df DM |
149 | } |
150 | ||
151 | bool | |
152 | pattern_test_state_machine::can_purge_p (state_t s ATTRIBUTE_UNUSED) const | |
153 | { | |
154 | return true; | |
155 | } | |
156 | ||
157 | } // anonymous namespace | |
158 | ||
159 | /* Internal interface to this file. */ | |
160 | ||
161 | state_machine * | |
162 | make_pattern_test_state_machine (logger *logger) | |
163 | { | |
164 | return new pattern_test_state_machine (logger); | |
165 | } | |
166 | ||
75038aa6 DM |
167 | } // namespace ana |
168 | ||
757bf1df | 169 | #endif /* #if ENABLE_ANALYZER */ |