[Bug tree-optimization/70138] [6 Regression] wrong code at -O3 on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70138

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Slightly cleaned up testcase from creduce mess:
double u[1782225];

static void
foo (int *x)
{
  double c = 0.0;
  int a, b;
  for (a = 0; a < 1335; a++)
    {
      for (b = 0; b < 1335; b++)
        c = c + u[1336 * a];
      u[1336 * a] *= 2.0;
    }
  *x = c;
}

int
main ()
{
  int d, e;
  for (d = 0; d < 1782225; d++)
    u[d] = 2.0;
  foo (&e);
  if (e != 3564450)
    __builtin_abort ();
  return 0;
}