| // 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); |
| } |