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
|
// RUN: %clang_cc1 -fsyntax-only %s 2>&1 | FileCheck %s
#define M1(x) x
#define M2 1;
void foo() {
M1(
M2);
// CHECK: :7:{{[0-9]+}}: warning: expression result unused
// CHECK: :4:{{[0-9]+}}: note: expanded from macro 'M2'
// CHECK: :3:{{[0-9]+}}: note: expanded from macro 'M1'
}
#define A 1
#define B A
#define C B
void bar() {
C;
// CHECK: :17:3: warning: expression result unused
// CHECK: :15:11: note: expanded from macro 'C'
// CHECK: :14:11: note: expanded from macro 'B'
// CHECK: :13:11: note: expanded from macro 'A'
}
// rdar://7597492
#define sprintf(str, A, B) \
__builtin___sprintf_chk (str, 0, 42, A, B)
void baz(char *Msg) {
sprintf(Msg, " sizeof FoooLib : =%3u\n", 12LL);
}
// PR9279: comprehensive tests for multi-level macro back traces
#define macro_args1(x) x
#define macro_args2(x) macro_args1(x)
#define macro_args3(x) macro_args2(x)
#define macro_many_args1(x, y, z) y
#define macro_many_args2(x, y, z) macro_many_args1(x, y, z)
#define macro_many_args3(x, y, z) macro_many_args2(x, y, z)
void test() {
macro_args3(1);
// CHECK: {{.*}}:43:15: warning: expression result unused
// Also check that the 'caret' printing agrees with the location here where
// its easy to FileCheck.
// CHECK-NEXT: macro_args3(1);
// CHECK-NEXT: ~~~~~~~~~~~~^~
// CHECK: {{.*}}:36:36: note: expanded from macro 'macro_args3'
// CHECK: {{.*}}:35:36: note: expanded from macro 'macro_args2'
// CHECK: {{.*}}:34:24: note: expanded from macro 'macro_args1'
macro_many_args3(
1,
2,
3);
// CHECK: {{.*}}:55:5: warning: expression result unused
// CHECK: {{.*}}:40:55: note: expanded from macro 'macro_many_args3'
// CHECK: {{.*}}:39:55: note: expanded from macro 'macro_many_args2'
// CHECK: {{.*}}:38:35: note: expanded from macro 'macro_many_args1'
macro_many_args3(
1,
M2,
3);
// CHECK: {{.*}}:64:5: warning: expression result unused
// CHECK: {{.*}}:4:12: note: expanded from macro 'M2'
// CHECK: {{.*}}:40:55: note: expanded from macro 'macro_many_args3'
// CHECK: {{.*}}:39:55: note: expanded from macro 'macro_many_args2'
// CHECK: {{.*}}:38:35: note: expanded from macro 'macro_many_args1'
macro_many_args3(
1,
macro_args2(2),
3);
// CHECK: {{.*}}:74:17: warning: expression result unused
// This caret location needs to be printed *inside* a different macro's
// arguments.
// CHECK-NEXT: macro_args2(2),
// CHECK-NEXT: ~~~~~~~~~~~~^~~
// CHECK: {{.*}}:35:36: note: expanded from macro 'macro_args2'
// CHECK: {{.*}}:34:24: note: expanded from macro 'macro_args1'
// CHECK: {{.*}}:40:55: note: expanded from macro 'macro_many_args3'
// CHECK: {{.*}}:39:55: note: expanded from macro 'macro_many_args2'
// CHECK: {{.*}}:38:35: note: expanded from macro 'macro_many_args1'
}
#define variadic_args1(x, y, ...) y
#define variadic_args2(x, ...) variadic_args1(x, __VA_ARGS__)
#define variadic_args3(x, y, ...) variadic_args2(x, y, __VA_ARGS__)
void test2() {
variadic_args3(1, 2, 3, 4);
// CHECK: {{.*}}:93:21: warning: expression result unused
// CHECK-NEXT: variadic_args3(1, 2, 3, 4);
// CHECK-NEXT: ~~~~~~~~~~~~~~~~~~^~~~~~~~
// CHECK: {{.*}}:90:53: note: expanded from macro 'variadic_args3'
// CHECK: {{.*}}:89:50: note: expanded from macro 'variadic_args2'
// CHECK: {{.*}}:88:35: note: expanded from macro 'variadic_args1'
}
#define variadic_pasting_args1(x, y, z) y
#define variadic_pasting_args2(x, ...) variadic_pasting_args1(x ## __VA_ARGS__)
#define variadic_pasting_args2a(x, y, ...) variadic_pasting_args1(x, y ## __VA_ARGS__)
#define variadic_pasting_args3(x, y, ...) variadic_pasting_args2(x, y, __VA_ARGS__)
#define variadic_pasting_args3a(x, y, ...) variadic_pasting_args2a(x, y, __VA_ARGS__)
void test3() {
variadic_pasting_args3(1, 2, 3, 4);
// CHECK: {{.*}}:109:32: warning: expression result unused
// CHECK: {{.*}}:105:72: note: expanded from macro 'variadic_pasting_args3'
// CHECK: {{.*}}:103:68: note: expanded from macro 'variadic_pasting_args2'
// CHECK: {{.*}}:102:41: note: expanded from macro 'variadic_pasting_args1'
variadic_pasting_args3a(1, 2, 3, 4);
// CHECK: {{.*}}:115:30: warning: expression result unused
// CHECK: {{.*}}:106:71: note: expanded from macro 'variadic_pasting_args3a'
// CHECK: {{.*}}:104:70: note: expanded from macro 'variadic_pasting_args2a'
// CHECK: {{.*}}:102:41: note: expanded from macro 'variadic_pasting_args1'
}
|
