27 lines
999 B
C
27 lines
999 B
C
/* PR 30457 warn about va_start(ap, invalid) */
|
|
/* { dg-do compile } */
|
|
/* { dg-options "-std=c99" } */
|
|
|
|
/* Undefined by C99 7.15.1.4p4 (va_start):
|
|
"If the parameter parmN is declared with the register storage
|
|
class, with a function or array type, or with a type that is
|
|
not compatible with the type that results after application of
|
|
the default argument promotions, the behavior is undefined." */
|
|
|
|
#include <stdarg.h>
|
|
|
|
void foo(register short paramN, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, paramN); /* { dg-warning "undefined behaviour when second parameter of 'va_start' is declared with 'register' storage" } */
|
|
|
|
/* Undefined by C99 7.15.1.1p2: */
|
|
(void) va_arg(ap, char); /* { dg-warning "'char' is promoted to 'int' when passed through '...'" } */
|
|
/* { dg-message "note: .so you should pass .int. not .char. to .va_arg.." "" { target *-*-* } 20 } */
|
|
/* { dg-message "note: if this code is reached, the program will abort" "" { target *-*-* } 20 } */
|
|
|
|
va_end(ap);
|
|
}
|
|
|