1 // RUN: %clang_cc1 -fsyntax-only -verify %s 2 // RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-apple-darwin9 3 4 void 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 12 void f2(int a, int b, ...) 13 { 14 __builtin_va_list ap; 15 16 __builtin_va_start(ap, 10); // expected-warning {{second argument to 'va_start' is not the last named parameter}} 17 __builtin_va_start(ap, a); // expected-warning {{second argument to 'va_start' is not the last named parameter}} 18 __builtin_va_start(ap, b); 19 } 20 21 void f3(float a, ...) { // expected-note 2{{parameter of type 'float' is declared here}} 22 __builtin_va_list ap; 23 24 __builtin_va_start(ap, a); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}} 25 __builtin_va_start(ap, (a)); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}} 26 } 27 28 29 // stdarg: PR3075 30 void f4(const char *msg, ...) { 31 __builtin_va_list ap; 32 __builtin_stdarg_start((ap), (msg)); 33 __builtin_va_end (ap); 34 } 35 36 void f5() { 37 __builtin_va_list ap; 38 __builtin_va_start(ap,ap); // expected-error {{'va_start' used in function with fixed args}} 39 } 40 41 void f6(int a, ...) { 42 __builtin_va_list ap; 43 __builtin_va_start(ap); // expected-error {{too few arguments to function}} 44 } 45 46 // PR3350 47 void 48 foo(__builtin_va_list authors, ...) { 49 __builtin_va_start (authors, authors); 50 (void)__builtin_va_arg(authors, int); 51 __builtin_va_end (authors); 52 } 53 54 void f7(int a, ...) { 55 __builtin_va_list ap; 56 __builtin_va_start(ap, a); 57 // FIXME: This error message is sub-par. 58 __builtin_va_arg(ap, int) = 1; // expected-error {{expression is not assignable}} 59 int *x = &__builtin_va_arg(ap, int); // expected-error {{cannot take the address of an rvalue}} 60 __builtin_va_end(ap); 61 } 62 63 void f8(int a, ...) { 64 __builtin_va_list ap; 65 __builtin_va_start(ap, a); 66 (void)__builtin_va_arg(ap, void); // expected-error {{second argument to 'va_arg' is of incomplete type 'void'}} 67 __builtin_va_end(ap); 68 } 69 70 enum E { x = -1, y = 2, z = 10000 }; 71 void f9(__builtin_va_list args) 72 { 73 (void)__builtin_va_arg(args, float); // expected-warning {{second argument to 'va_arg' is of promotable type 'float'}} 74 (void)__builtin_va_arg(args, enum E); // Don't warn here in C 75 (void)__builtin_va_arg(args, short); // expected-warning {{second argument to 'va_arg' is of promotable type 'short'}} 76 (void)__builtin_va_arg(args, char); // expected-warning {{second argument to 'va_arg' is of promotable type 'char'}} 77 } 78 79 void f10(int a, ...) { 80 int i; 81 __builtin_va_list ap; 82 i = __builtin_va_start(ap, a); // expected-error {{assigning to 'int' from incompatible type 'void'}} 83 __builtin_va_end(ap); 84 } 85 86 void f11(short s, ...) { // expected-note {{parameter of type 'short' is declared here}} 87 __builtin_va_list ap; 88 __builtin_va_start(ap, s); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}} 89 __builtin_va_end(ap); 90 } 91 92 void f12(register int i, ...) { // expected-note {{parameter of type 'int' is declared here}} 93 __builtin_va_list ap; 94 __builtin_va_start(ap, i); // expected-warning {{passing a parameter declared with the 'register' keyword to 'va_start' has undefined behavior}} 95 __builtin_va_end(ap); 96 } 97
