gcc/testsuite/gcc.c-torture/execute/complex-1.c

void abort (void);
void exit (int);

double
g0 (double x)
{
  return 1.0;
}

double
g1 (double x)
{
  return -1.0;
}

double
g2 (double x)
{
  return 0.0;
}

__complex__ double
xcexp (__complex__ double x)
{
  double r;

  r = g0 (__real__ x);
  __real__ x = r * g1 (__imag__ x);
  __imag__ x = r * g2 (__imag__ x);
  return x;
}

int
main (void)
{
  __complex__ double x;

  x = xcexp (1.0i);
  if (__real__ x != -1.0)
    abort ();
  if (__imag__ x != 0.0)
    abort ();
  exit (0);
}