isl_tab.c: push_union: handle NULL input

[isl.git] / test_inputs / codegen / omega / stride2-0.in

[n] -> { s0[In_1, In_2] -> [In_1, In_2] : exists (e0 = [(In_1)/32]: 32e0 = In_1 and In_2 <= 31 + In_1 and In_1 >= 0 and In_2 >= In_1 and In_2 <= n) }
{  :  }
[n] -> { [i0, i1] -> atomic[o0] : o0 <= 0; [i0, i1] -> separate[o0] : o0 >= 1 }