gcc/testsuite/gcc.c-torture/execute/pr35456.c

   1 /* { dg-skip-if "signed zero not supported" { "vax-*-*" } } */
   2 extern void abort (void);
   3
   4 double
   5 __attribute__ ((noinline))
   6 not_fabs (double x)
   7 {
   8   return x >= 0.0 ? x : -x;
   9 }
  10
  11 int main()
  12 {
  13   double x = -0.0;
  14   double y;
  15
  16   y = not_fabs (x);
  17
  18   if (!__builtin_signbit (y))
  19     abort();
  20
  21   return 0;
  22 }