[Bug tree-optimization/59591] [4.9 Regression] ICE in vect_get_vec_def_for_stmt_copy, at tree-vect-stmts.c:156 for -march=core-avx2

["jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59591

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Slightly reduced fortran testcase for -O3 -mavx2:
subroutine foo (m, n, o, p, q, e, a, b, x, f)
  integer, intent (in) :: n, o, p, q, m, f
  integer, dimension (n:o) :: e, a, b
  integer, dimension (n:o, p:q) :: x
  integer :: j, i
  do j = 1, m
    do i = n, f
      if (e(i) .eq. 0) then
        a(i) = x(i, b(i))
      endif
    enddo
  enddo
end subroutine foo

and C testcase for -O3 -mavx2 -fopenmp-simd:
int p[256], q[256], r[256], t[256];

void
foo (void)
{
  int i;
  #pragma omp simd safelen(64)
  for (i = 0; i < 256; i++)
    if (r[i] > 32)
      t[i] = p[q[i] * 3L + 2L];
}