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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
// RUN: %clang_cc1 -fsyntax-only %s -verify
[[noreturn]] extern void noret();
[[noreturn]] extern void noret2();
extern void ordinary();
typedef void (*func_type)(void);
// Constant initialization.
void (* const const_fptr)() = noret;
[[noreturn]] void test_global_const() {
const_fptr();
}
const func_type const_fptr_cast = (func_type)noret2;
[[noreturn]] void test_global_cast() {
const_fptr_cast();
}
void (* const const_fptr_list)() = {noret};
[[noreturn]] void test_global_list() {
const_fptr_list();
}
const func_type const_fptr_fcast = func_type(noret2);
[[noreturn]] void test_global_fcast() {
const_fptr_fcast();
}
[[noreturn]] void test_local_const() {
void (* const fptr)() = noret;
fptr();
}
// Global variable assignment.
void (*global_fptr)() = noret;
[[noreturn]] void test_global_noassign() {
global_fptr();
} // expected-warning {{function declared 'noreturn' should not return}}
[[noreturn]] void test_global_assign() {
global_fptr = noret;
global_fptr();
} // expected-warning {{function declared 'noreturn' should not return}}
// Local variable assignment.
[[noreturn]] void test_init() {
func_type func_ptr = noret;
func_ptr();
}
[[noreturn]] void test_assign() {
void (*func_ptr)(void);
func_ptr = noret;
func_ptr();
}
[[noreturn]] void test_override() {
func_type func_ptr;
func_ptr = ordinary;
func_ptr = noret;
func_ptr();
}
[[noreturn]] void test_if_all(int x) {
func_type func_ptr;
if (x > 0)
func_ptr = noret;
else
func_ptr = noret2;
func_ptr();
}
[[noreturn]] void test_if_mix(int x) {
func_type func_ptr;
if (x > 0)
func_ptr = noret;
else
func_ptr = ordinary;
func_ptr();
} // expected-warning {{function declared 'noreturn' should not return}}
[[noreturn]] void test_if_opt(int x) {
func_type func_ptr = noret;
if (x > 0)
func_ptr = ordinary;
func_ptr();
} // expected-warning {{function declared 'noreturn' should not return}}
[[noreturn]] void test_if_opt2(int x) {
func_type func_ptr = ordinary;
if (x > 0)
func_ptr = noret;
func_ptr();
} // expected-warning {{function declared 'noreturn' should not return}}
[[noreturn]] void test_if_nest_all(int x, int y) {
func_type func_ptr;
if (x > 0) {
if (y > 0)
func_ptr = noret;
else
func_ptr = noret2;
} else {
if (y < 0)
func_ptr = noret2;
else
func_ptr = noret;
}
func_ptr();
}
[[noreturn]] void test_if_nest_mix(int x, int y) {
func_type func_ptr;
if (x > 0) {
if (y > 0)
func_ptr = noret;
else
func_ptr = noret2;
} else {
if (y < 0)
func_ptr = ordinary;
else
func_ptr = noret;
}
func_ptr();
} // expected-warning {{function declared 'noreturn' should not return}}
[[noreturn]] void test_switch_all(int x) {
func_type func_ptr;
switch(x) {
case 1:
func_ptr = noret;
break;
default:
func_ptr = noret2;
break;
}
func_ptr();
}
[[noreturn]] void test_switch_mix(int x) {
func_type func_ptr;
switch(x) {
case 1:
func_ptr = ordinary;
break;
default:
func_ptr = noret;
break;
}
func_ptr();
} // expected-warning {{function declared 'noreturn' should not return}}
[[noreturn]] void test_switch_fall(int x) {
func_type func_ptr;
switch(x) {
case 1:
func_ptr = ordinary;
default:
func_ptr = noret;
break;
}
func_ptr();
}
[[noreturn]] void test_switch_all_nest(int x, int y) {
func_type func_ptr;
switch(x) {
case 1:
func_ptr = noret;
break;
default:
if (y > 0)
func_ptr = noret2;
else
func_ptr = noret;
break;
}
func_ptr();
}
[[noreturn]] void test_switch_mix_nest(int x, int y) {
func_type func_ptr;
switch(x) {
case 1:
func_ptr = noret;
break;
default:
if (y > 0)
func_ptr = noret2;
else
func_ptr = ordinary;
break;
}
func_ptr();
} // expected-warning {{function declared 'noreturn' should not return}}
// Function parameters.
[[noreturn]] void test_param(void (*func_ptr)() = noret) {
func_ptr();
} // expected-warning {{function declared 'noreturn' should not return}}
[[noreturn]] void test_const_param(void (* const func_ptr)() = noret) {
func_ptr();
} // expected-warning {{function declared 'noreturn' should not return}}
// Escaped value.
extern void abc_01(func_type &);
extern void abc_02(func_type *);
[[noreturn]] void test_escape_ref() {
func_type func_ptr = noret;
abc_01(func_ptr);
func_ptr();
} // expected-warning {{function declared 'noreturn' should not return}}
[[noreturn]] void test_escape_addr() {
func_type func_ptr = noret;
abc_02(&func_ptr);
func_ptr();
} // expected-warning {{function declared 'noreturn' should not return}}
|
