clang/test/SemaCXX/microsoft-varargs.cpp

   1 // RUN: %clang_cc1 -triple thumbv7-windows -fms-compatibility -fsyntax-only %s -verify
   2 // RUN: %clang_cc1 -triple aarch64-windows -fms-compatibility -fsyntax-only %s -verify
   3 // expected-no-diagnostics
   4
   5 extern "C" {
   6 typedef char * va_list;
   7 void __va_start(va_list *, ...);
   8 }
   9
  10 int test___va_start(int i, ...) {
  11   va_list ap;
  12   __va_start(&ap, ( &reinterpret_cast<const char &>(i) ),
  13              ( (sizeof(i) + 4 - 1) & ~(4 - 1) ),
  14              ( &reinterpret_cast<const char &>(i) ));
  15   return (*(int *)((ap += ( (sizeof(int) + 4 - 1) & ~(4 - 1) ) + ( ((va_list)0 - (ap)) & (__alignof(int) - 1) )) - ( (sizeof(int) + 4 - 1) & ~(4 - 1) )));
  16 }
  17
  18 int builtin(int i, ...) {
  19   __builtin_va_list ap;
  20   __builtin_va_start(ap, i);
  21   return __builtin_va_arg(ap, int);
  22 }
  23
  24 void test___va_start_ignore_const(const char *format, ...) {
  25   va_list args;
  26   ((void)(__va_start(&args, (&const_cast<char &>(reinterpret_cast<const volatile char &>(format))), ((sizeof(format) + 4 - 1) & ~(4 - 1)), (&const_cast<char &>(reinterpret_cast<const volatile char &>(format))))));
  27 }
  28