https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65206
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> --- I'm talking about (compute_affine_dependence stmt_a: _5 = a1[i_16]; stmt_b: MASK_STORE (_34, 0B, _ifc__32, _9); ) -> dependence analysis failed somehow it works for (compute_affine_dependence stmt_a: _8 = MASK_LOAD (_33, 0B, _ifc__32); stmt_b: MASK_STORE (_35, 0B, _ifc__36, _11); (analyze_overlapping_iterations (chrec_a = {0B, +, 4}_1) (chrec_b = {0B, +, 4}_1) (overlap_iterations_a = [0]) (overlap_iterations_b = [0])) )