gcc/testsuite/gcc.dg/torture/pr55555.c

   1 /* { dg-do run } */
   2
   3 double s[4] = { 1.0, 2.0, 3.0, 4.0 }, pol_x[2] = { 5.0, 6.0 };
   4
   5 __attribute__((noinline)) int
   6 foo (void)
   7 {
   8   double coef_x[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
   9   int lxp = 0;
  10   if (lxp <= 1)
  11     do
  12       {
  13         double t = pol_x[lxp];
  14         long S;
  15         long l = lxp * 4L - 1;
  16         for (S = 1; S <= 4; S++)
  17           coef_x[S + l] = coef_x[S + l] + s[S - 1] * t;
  18       }
  19     while (lxp++ != 1);
  20   asm volatile ("" : : "r" (coef_x) : "memory");
  21   for (lxp = 0; lxp < 8; lxp++)
  22     if (coef_x[lxp] != ((lxp & 3) + 1) * (5.0 + (lxp >= 4)))
  23       __builtin_abort ();
  24   return 1;
  25 }
  26
  27 int
  28 main ()
  29 {
  30   asm volatile ("" : : : "memory");
  31   if (!foo ())
  32     __builtin_abort ();
  33   return 0;
  34 }