gcc/testsuite/gcc.dg/vect/pr70138-1.c

   1 #include "tree-vect.h"
   2
   3 double u[33 * 33];
   4
   5 __attribute__((noinline, noclone)) static void
   6 foo (int *x)
   7 {
   8   double c = 0.0;
   9   int a, b;
  10   for (a = 0; a < 33; a++)
  11     {
  12       for (b = 0; b < 33; b++)
  13         c = c + u[34 * a];
  14       u[34 * a] *= 2.0;
  15     }
  16   *x = c;
  17 }
  18
  19 int
  20 main ()
  21 {
  22   int d, e;
  23   check_vect ();
  24   for (d = 0; d < 33 * 33; d++)
  25     {
  26       u[d] = 499.0;
  27       __asm__ volatile ("" : : : "memory");
  28     }
  29   for (d = 0; d < 33; d++)
  30     {
  31       u[d * 34] = (d + 2);
  32       __asm__ volatile ("" : : : "memory");
  33     }
  34   foo (&e);
  35   if (e != 33 * (2 + 34) / 2 * 33)
  36     __builtin_abort ();
  37   return 0;
  38 }