1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/* Functions to enable and disable individual warnings on an expression
and statement basis.
Copyright (C) 2021-2023 Free Software Foundation, Inc.
Contributed by Martin Sebor <msebor@redhat.com>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "bitmap.h"
#include "tree.h"
#include "cgraph.h"
#include "hash-map.h"
#include "diagnostic-spec.h"
#include "pretty-print.h"
#include "options.h"
/* Initialize *THIS from warning option OPT. */
nowarn_spec_t::nowarn_spec_t (opt_code opt)
{
/* Create a very simple mapping based on testing and experience.
It should become more refined with time. */
switch (opt)
{
case no_warning:
m_bits = 0;
break;
case all_warnings:
m_bits = -1;
break;
/* Flow-sensitive warnings about pointer problems issued by both
front ends and the middle end. */
case OPT_Waddress:
case OPT_Wnonnull:
m_bits = NW_NONNULL;
break;
/* Flow-sensitive warnings about arithmetic overflow issued by both
front ends and the middle end. */
case OPT_Woverflow:
case OPT_Wshift_count_negative:
case OPT_Wshift_count_overflow:
case OPT_Wstrict_overflow:
m_bits = NW_VFLOW;
break;
/* Lexical warnings issued by front ends. */
case OPT_Wabi:
case OPT_Wlogical_op:
case OPT_Wparentheses:
case OPT_Wreturn_type:
case OPT_Wsizeof_array_div:
case OPT_Wstrict_aliasing:
case OPT_Wunused:
case OPT_Wunused_function:
case OPT_Wunused_but_set_variable:
case OPT_Wunused_variable:
case OPT_Wunused_but_set_parameter:
m_bits = NW_LEXICAL;
break;
/* Access warning group. */
case OPT_Warray_bounds_:
case OPT_Wformat_overflow_:
case OPT_Wformat_truncation_:
case OPT_Wrestrict:
case OPT_Wsizeof_pointer_memaccess:
case OPT_Wstrict_aliasing_:
case OPT_Wstringop_overflow_:
case OPT_Wstringop_overread:
case OPT_Wstringop_truncation:
m_bits = NW_ACCESS;
break;
/* Initialization warning group. */
case OPT_Winit_self:
case OPT_Wuninitialized:
case OPT_Wmaybe_uninitialized:
m_bits = NW_UNINIT;
break;
case OPT_Wdangling_pointer_:
case OPT_Wreturn_local_addr:
case OPT_Wuse_after_free_:
m_bits = NW_DANGLING;
break;
case OPT_Wpessimizing_move:
case OPT_Wredundant_move:
m_bits = NW_REDUNDANT;
break;
default:
/* A catchall group for everything else. */
m_bits = NW_OTHER;
}
}
/* A mapping from a 'location_t' to the warning spec set for it. */
GTY(()) nowarn_map_t *nowarn_map;
/* Return the no-warning disposition for location LOC and option OPT
or for all/any otions by default. */
bool
warning_suppressed_at (location_t loc, opt_code opt /* = all_warnings */)
{
gcc_checking_assert (!RESERVED_LOCATION_P (loc));
if (!nowarn_map)
return false;
if (const nowarn_spec_t* const pspec = nowarn_map->get (loc))
{
const nowarn_spec_t optspec (opt);
return *pspec & optspec;
}
return false;
}
/* Change the supression of warnings for location LOC.
OPT controls which warnings are affected.
The wildcard OPT of -1 controls all warnings.
If SUPP is true (the default), enable the suppression of the warnings.
If SUPP is false, disable the suppression of the warnings. */
bool
suppress_warning_at (location_t loc, opt_code opt /* = all_warnings */,
bool supp /* = true */)
{
gcc_checking_assert (!RESERVED_LOCATION_P (loc));
const nowarn_spec_t optspec (supp ? opt : opt_code ());
if (nowarn_spec_t *pspec = nowarn_map ? nowarn_map->get (loc) : NULL)
{
if (supp)
{
*pspec |= optspec;
return true;
}
*pspec &= optspec;
if (*pspec)
return true;
nowarn_map->remove (loc);
return false;
}
if (!supp || opt == no_warning)
return false;
if (!nowarn_map)
nowarn_map = nowarn_map_t::create_ggc (32);
nowarn_map->put (loc, optspec);
return true;
}
/* Copy the no-warning disposition from one location to another. */
void
copy_warning (location_t to, location_t from)
{
if (!nowarn_map)
return;
nowarn_spec_t *from_spec;
if (RESERVED_LOCATION_P (from))
from_spec = NULL;
else
from_spec = nowarn_map->get (from);
if (RESERVED_LOCATION_P (to))
/* We cannot set no-warning dispositions for 'to', so we have no chance but
lose those potentially set for 'from'. */
;
else
{
if (from_spec)
{
nowarn_spec_t tem = *from_spec;
nowarn_map->put (to, tem);
}
else
nowarn_map->remove (to);
}
}
|
