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      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 }