varargs.c revision f502691c86299ed23b7e121e27610ba5bb44a1ee 
1// RUN: clang-cc -fsyntax-only -verify %s &&
2// RUN: clang-cc -fsyntax-only -verify %s -triple x86_64-apple-darwin9
3
4void f1(int a)
5{
6    __builtin_va_list ap;
7
8    __builtin_va_start(ap, a, a); // expected-error {{too many arguments to function}}
9    __builtin_va_start(ap, a); // expected-error {{'va_start' used in function with fixed args}}
10}
11
12void f2(int a, int b, ...)
13{
14    __builtin_va_list ap;
15
16    __builtin_va_start(ap, 10); // expected-warning {{second parameter of 'va_start' not last named argument}}
17    __builtin_va_start(ap, a); // expected-warning {{second parameter of 'va_start' not last named argument}}
18    __builtin_va_start(ap, b);
19}
20
21void f3(float a, ...)
22{
23    __builtin_va_list ap;
24
25    __builtin_va_start(ap, a);
26    __builtin_va_start(ap, (a));
27}
28
29
30// stdarg: PR3075
31void f4(const char *msg, ...) {
32 __builtin_va_list ap;
33 __builtin_stdarg_start((ap), (msg));
34 __builtin_va_end (ap);
35}
36
37void f5() {
38  __builtin_va_list ap;
39  __builtin_va_start(ap,ap); // expected-error {{'va_start' used in function with fixed args}}
40}
41
42void f6(int a, ...) {
43  __builtin_va_list ap;
44  __builtin_va_start(ap); // expected-error {{too few arguments to function}}
45}
46
47// PR3350
48void
49foo(__builtin_va_list authors, ...) {
50  __builtin_va_start (authors, authors);
51  (void)__builtin_va_arg(authors, int);
52  __builtin_va_end (authors);
53}
54
55void f7(int a, ...) {
56  __builtin_va_list ap;
57  __builtin_va_start(ap, a);
58  // FIXME: This error message is sub-par.
59  __builtin_va_arg(ap, int) = 1; // expected-error {{non-object type 'int' is not assignable}}
60  int *x = &__builtin_va_arg(ap, int); // expected-error {{address expression must be an lvalue or a function designator}}
61  __builtin_va_end(ap);
62}
63
64// rdar://6726818
65void f8() {
66  const __builtin_va_list args2;
67  (void)__builtin_va_arg(args2, int);
68}
69
70