gcc/testsuite/gcc.c-torture/execute/loop-13.c

   1 /* PR opt/7130 */
   2 #define TYPE long
   3
   4 void
   5 scale (TYPE *alpha, TYPE *x, int n)
   6 {
   7   int i, ix;
   8
   9   if (*alpha != 1)
  10     for (i = 0, ix = 0; i < n; i++, ix += 2)
  11       {
  12         TYPE tmpr, tmpi;
  13         tmpr = *alpha * x[ix];
  14         tmpi = *alpha * x[ix + 1];
  15         x[ix] = tmpr;
  16         x[ix + 1] = tmpi;
  17       }
  18 }
  19
  20 int
  21 main (void)
  22 {
  23   int i;
  24   TYPE x[10];
  25   TYPE alpha = 2;
  26
  27   for (i = 0; i < 10; i++)
  28     x[i] = i;
  29
  30   scale (&alpha, x, 5);
  31
  32   if (x[9] != 18)
  33     abort ();
  34
  35   return 0;
  36 }