clang/test/Misc/warn-in-system-macro-def.c

   1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -isystem %S -Wdouble-promotion -fsyntax-only %s  2>&1 | FileCheck -allow-empty %s
   2 // CHECK: warning:
   3 // CHECK: expanded from macro 'ISNAN'
   4 // CHECK: expanded from macro 'isnan'
   5
   6 #include <warn-in-system-macro-def.c.inc>
   7
   8 #define isnan(x) \
   9         (sizeof (x) == sizeof (float)                \
  10         ? __isnanf (x)                    \
  11         : sizeof (x) == sizeof (double)               \
  12         ? __isnan (x) : __isnanl (x))
  13
  14 int main(void)
  15 {
  16         double foo = 1.0;
  17
  18         if (ISNAN(foo))
  19                 return 1;
  20         return 0;
  21 }