| 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 | |