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
|
/* PR c/80116 */
/* { dg-options "-Wmultistatement-macros" } */
/* { dg-do compile } */
#define SWAP(X, Y) \
tmp = X; /* { dg-warning "macro expands to multiple statements" } */ \
X = Y; \
Y = tmp
#define STUFF \
if (0) {} else x = y
#define STUFF2 \
if (0) {} else x = y; x++
#define STUFF3 \
if (x) \
{} \
else /* { dg-message "not guarded by this 'else' clause" } */ \
SWAP(x, y) /* { dg-message "in expansion of macro .SWAP." } */
#define SET(X, Y) \
(X) = (Y)
#define STUFF4 \
if (x) \
{} \
else \
SET(x, y); \
SET(x, y)
#define STUFF5 \
{ tmp = x; x = y; }
#define STUFF6 \
x++;;
int x, y, tmp;
void
fn1 (void)
{
if (x)
{
}
else /* { dg-message "not guarded by this 'else' clause" } */
SWAP(x, y); /* { dg-message "in expansion of macro .SWAP." } */
}
void
fn2 (void)
{
SWAP(x, y);
}
void
fn3 (void)
{
if (x)
{
}
else
{
SWAP(x, y);
}
}
void
fn4 (void)
{
if (x)
{
}
else
({ x = 10; x++; });
}
void
fn5 (void)
{
if (x)
{
}
else /* { dg-message "not guarded by this 'else' clause" } */
L1:
SWAP (x, y); /* { dg-message "in expansion of macro .SWAP." } */
goto L1;
}
void
fn6 (void)
{
if (x)
{
}
else
SET (x, y);
SET (tmp, x);
}
void
fn7 (void)
{
STUFF;
}
void
fn8 (void)
{
STUFF2;
}
void
fn9 (void)
{
STUFF3; /* { dg-message "in expansion of macro .STUFF3." } */
}
void
fn10 (void)
{
STUFF4;
}
void
fn11 (void)
{
if (x)
STUFF5;
}
void
fn12 (void)
{
if (x)
STUFF6;
}
|
