clang/test/Sema/varargs_unreachable.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-apple-darwin9
   2 // expected-no-diagnostics
   3
   4 // From <rdar://problem/12322000>.  Do not warn about undefined behavior of parameter
   5 // argument types in unreachable code in a macro.
   6 #define VA_ARG_RDAR12322000(Marker, TYPE)         ((sizeof (TYPE) < sizeof (UINTN_RDAR12322000)) ? (TYPE)(__builtin_va_arg (Marker, UINTN_RDAR12322000)) : (TYPE)(__builtin_va_arg (Marker, TYPE)))
   7
   8 // 64-bit system
   9 typedef unsigned long long  UINTN_RDAR12322000;
  10
  11 int test_VA_ARG_RDAR12322000 (__builtin_va_list Marker)
  12 {
  13   return VA_ARG_RDAR12322000 (Marker, short); // no-warning
  14 }