test/Sema/va_arg_x86_64.c

// RUN: clang -fsyntax-only -verify -triple=x86_64-unknown-freebsd7.0 %s

// PR2631
char* foo(char *fmt, __builtin_va_list ap)
{
  return __builtin_va_arg((ap), char *);
}

// PR2692
typedef __builtin_va_list va_list;
static char *f (char * (*g) (char **, int), char **p, ...) {
    char *s;
    va_list v;
    s = g (p, __builtin_va_arg(v, int));
}