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
|
// RUN: %clang_cc1 -fsyntax-only -verify %s -triple i386-pc-unknown
// RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-apple-darwin9
// RUN: %clang_cc1 -fsyntax-only -fms-compatibility -DMS -verify %s -triple x86_64-pc-win32
void f1(int a)
{
__builtin_va_list ap;
__builtin_va_start(ap, a, a); // expected-error {{too many arguments to function}}
__builtin_va_start(ap, a); // expected-error {{'va_start' used in function with fixed args}}
}
void f2(int a, int b, ...)
{
__builtin_va_list ap;
__builtin_va_start(ap, 10); // expected-warning {{second argument to 'va_start' is not the last named parameter}}
__builtin_va_start(ap, a); // expected-warning {{second argument to 'va_start' is not the last named parameter}}
__builtin_va_start(ap, b);
}
void f3(float a, ...) { // expected-note 2{{parameter of type 'float' is declared here}}
__builtin_va_list ap;
__builtin_va_start(ap, a); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}}
__builtin_va_start(ap, (a)); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}}
}
// stdarg: PR3075 and PR2531
void f4(const char *msg, ...) {
__builtin_va_list ap;
__builtin_stdarg_start((ap), (msg));
__builtin_va_end (ap);
}
void f5() {
__builtin_va_list ap;
__builtin_va_start(ap,ap); // expected-error {{'va_start' used in function with fixed args}}
}
void f6(int a, ...) {
__builtin_va_list ap;
__builtin_va_start(ap); // expected-error {{too few arguments to function}}
}
// PR3350
void
foo(__builtin_va_list authors, ...) {
__builtin_va_start (authors, authors);
(void)__builtin_va_arg(authors, int);
__builtin_va_end (authors);
}
void f7(int a, ...) {
__builtin_va_list ap;
__builtin_va_start(ap, a);
// FIXME: This error message is sub-par.
__builtin_va_arg(ap, int) = 1; // expected-error {{expression is not assignable}}
int *x = &__builtin_va_arg(ap, int); // expected-error {{cannot take the address of an rvalue}}
__builtin_va_end(ap);
}
void f8(int a, ...) {
__builtin_va_list ap;
__builtin_va_start(ap, a);
(void)__builtin_va_arg(ap, void); // expected-error {{second argument to 'va_arg' is of incomplete type 'void'}}
__builtin_va_end(ap);
}
enum E { x = -1, y = 2, z = 10000 };
void f9(__builtin_va_list args)
{
(void)__builtin_va_arg(args, float); // expected-warning {{second argument to 'va_arg' is of promotable type 'float'}}
(void)__builtin_va_arg(args, enum E); // Don't warn here in C
(void)__builtin_va_arg(args, short); // expected-warning {{second argument to 'va_arg' is of promotable type 'short'}}
(void)__builtin_va_arg(args, char); // expected-warning {{second argument to 'va_arg' is of promotable type 'char'}}
}
void f10(int a, ...) {
int i;
__builtin_va_list ap;
i = __builtin_va_start(ap, a); // expected-error {{assigning to 'int' from incompatible type 'void'}}
__builtin_va_end(ap);
}
void f11(short s, ...) { // expected-note {{parameter of type 'short' is declared here}}
__builtin_va_list ap;
__builtin_va_start(ap, s); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}}
__builtin_va_end(ap);
}
void f12(register int i, ...) { // expected-note {{parameter of type 'int' is declared here}}
__builtin_va_list ap;
__builtin_va_start(ap, i); // expected-warning {{passing a parameter declared with the 'register' keyword to 'va_start' has undefined behavior}}
__builtin_va_end(ap);
}
enum __attribute__((packed)) E1 {
one1
};
void f13(enum E1 e, ...) {
__builtin_va_list va;
__builtin_va_start(va, e);
#ifndef MS
// In Microsoft compatibility mode, all enum types are int, but in
// non-ms-compatibility mode, this enumeration type will undergo default
// argument promotions.
// expected-note@-7 {{parameter of type 'enum E1' is declared here}}
// expected-warning@-6 {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}}
#endif
__builtin_va_end(va);
}
void f14(int e, ...) {
// expected-warning@+3 {{implicitly declaring library function 'va_start'}}
// expected-note@+2 {{include the header <stdarg.h>}}
// expected-error@+1 {{too few arguments to function call}}
va_start();
__builtin_va_list va;
va_start(va, e);
}
|
