1 | // RUN: %clang_cc1 -fsyntax-only -verify %s -triple i386-pc-unknown |
2 | // RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-apple-darwin9 |
3 | // RUN: %clang_cc1 -fsyntax-only -fms-compatibility -DMS -verify %s -triple x86_64-pc-win32 |
4 | |
5 | void f1(int a) |
6 | { |
7 | __builtin_va_list ap; |
8 | |
9 | __builtin_va_start(ap, a, a); // expected-error {{too many arguments to function}} |
10 | __builtin_va_start(ap, a); // expected-error {{'va_start' used in function with fixed args}} |
11 | } |
12 | |
13 | void f2(int a, int b, ...) |
14 | { |
15 | __builtin_va_list ap; |
16 | |
17 | __builtin_va_start(ap, 10); // expected-warning {{second argument to 'va_start' is not the last named parameter}} |
18 | __builtin_va_start(ap, a); // expected-warning {{second argument to 'va_start' is not the last named parameter}} |
19 | __builtin_va_start(ap, b); |
20 | } |
21 | |
22 | void f3(float a, ...) { // expected-note 2{{parameter of type 'float' is declared here}} |
23 | __builtin_va_list ap; |
24 | |
25 | __builtin_va_start(ap, a); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}} |
26 | __builtin_va_start(ap, (a)); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}} |
27 | } |
28 | |
29 | |
30 | // stdarg: PR3075 and PR2531 |
31 | void f4(const char *msg, ...) { |
32 | __builtin_va_list ap; |
33 | __builtin_stdarg_start((ap), (msg)); |
34 | __builtin_va_end (ap); |
35 | } |
36 | |
37 | void f5() { |
38 | __builtin_va_list ap; |
39 | __builtin_va_start(ap,ap); // expected-error {{'va_start' used in function with fixed args}} |
40 | } |
41 | |
42 | void f6(int a, ...) { |
43 | __builtin_va_list ap; |
44 | __builtin_va_start(ap); // expected-error {{too few arguments to function}} |
45 | } |
46 | |
47 | // PR3350 |
48 | void |
49 | foo(__builtin_va_list authors, ...) { |
50 | __builtin_va_start (authors, authors); |
51 | (void)__builtin_va_arg(authors, int); |
52 | __builtin_va_end (authors); |
53 | } |
54 | |
55 | void 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 {{expression is not assignable}} |
60 | int *x = &__builtin_va_arg(ap, int); // expected-error {{cannot take the address of an rvalue}} |
61 | __builtin_va_end(ap); |
62 | } |
63 | |
64 | void f8(int a, ...) { |
65 | __builtin_va_list ap; |
66 | __builtin_va_start(ap, a); |
67 | (void)__builtin_va_arg(ap, void); // expected-error {{second argument to 'va_arg' is of incomplete type 'void'}} |
68 | __builtin_va_end(ap); |
69 | } |
70 | |
71 | enum E { x = -1, y = 2, z = 10000 }; |
72 | void f9(__builtin_va_list args) |
73 | { |
74 | (void)__builtin_va_arg(args, float); // expected-warning {{second argument to 'va_arg' is of promotable type 'float'}} |
75 | (void)__builtin_va_arg(args, enum E); // Don't warn here in C |
76 | (void)__builtin_va_arg(args, short); // expected-warning {{second argument to 'va_arg' is of promotable type 'short'}} |
77 | (void)__builtin_va_arg(args, char); // expected-warning {{second argument to 'va_arg' is of promotable type 'char'}} |
78 | } |
79 | |
80 | void f10(int a, ...) { |
81 | int i; |
82 | __builtin_va_list ap; |
83 | i = __builtin_va_start(ap, a); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
84 | __builtin_va_end(ap); |
85 | } |
86 | |
87 | void f11(short s, ...) { // expected-note {{parameter of type 'short' is declared here}} |
88 | __builtin_va_list ap; |
89 | __builtin_va_start(ap, s); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}} |
90 | __builtin_va_end(ap); |
91 | } |
92 | |
93 | void f12(register int i, ...) { // expected-note {{parameter of type 'int' is declared here}} |
94 | __builtin_va_list ap; |
95 | __builtin_va_start(ap, i); // expected-warning {{passing a parameter declared with the 'register' keyword to 'va_start' has undefined behavior}} |
96 | __builtin_va_end(ap); |
97 | } |
98 | |
99 | enum __attribute__((packed)) E1 { |
100 | one1 |
101 | }; |
102 | |
103 | void f13(enum E1 e, ...) { |
104 | __builtin_va_list va; |
105 | __builtin_va_start(va, e); |
106 | #ifndef MS |
107 | // In Microsoft compatibility mode, all enum types are int, but in |
108 | // non-ms-compatibility mode, this enumeration type will undergo default |
109 | // argument promotions. |
110 | // expected-note@-7 {{parameter of type 'enum E1' is declared here}} |
111 | // expected-warning@-6 {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}} |
112 | #endif |
113 | __builtin_va_end(va); |
114 | } |
115 | |
116 | void f14(int e, ...) { |
117 | // expected-warning@+3 {{implicitly declaring library function 'va_start'}} |
118 | // expected-note@+2 {{include the header <stdarg.h>}} |
119 | // expected-error@+1 {{too few arguments to function call}} |
120 | va_start(); |
121 | __builtin_va_list va; |
122 | va_start(va, e); |
123 | } |
124 | |