[Bug tree-optimization/56688] Fortran save statement prevents loop vectorization.

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56688



--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-22 
13:31:23 UTC ---

C testcase:



int x[1024], y[1024];

int z;

void foo (void)

{

  unsigned i;

  for (i = 0; i < 1024; ++i)

    {

      z = x[i] - y[i];

      x[i] = z;

    }

}