read_verilog ../common/shifter.v
hierarchy -top top
proc
flatten
equiv_opt -assert -map +/lattice/cells_sim_xo2.v synth_lattice -family xo2 # equivalency check
design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd top # Constrain all select calls below inside the top module

select -assert-count 8 t:TRELLIS_FF
select -assert-none t:TRELLIS_FF t:TRELLIS_IO %% t:* %D