read_verilog ../common/shifter.v
hierarchy -top top
proc
flatten
equiv_opt -assert -map +/gowin/cells_sim.v synth_gowin # 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:DFF
select -assert-count 2  t:IBUF
select -assert-count 8  t:OBUF
select -assert-none t:DFF t:IBUF t:OBUF %% t:* %D