gcc/testsuite/gcc.dg/pr40669.c

   1 /* PR middle-end/40669 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -ffast-math" } */
   4
   5 double _Complex
   6 test (int d, int t, double *x, double *y, double *z, int n,
   7       double _Complex (*fnp) (double))
   8 {
   9   int m = n / 2;
  10   double min = y[t], max = z[t], med = x[m * d + t];
  11   double _Complex result = 0.0;
  12
  13   if (n == 0)
  14     return 0.0;
  15
  16   if (min > med)
  17     result += test (d, (t + 1) % d, x + (m + 1) * d, y, z, n - m - 1, fnp);
  18   else if (max < med)
  19     result += test (d, (t + 1) % d, x, y, z, m, fnp);
  20   else
  21     {
  22       result += fnp (y[0] + x[m]);
  23       result += test (d, (t + 1) % d, x + (m + 1) * d, y, z, n - m - 1, fnp);
  24     }
  25   return result;
  26 }