read_verilog ../top.v proc
dff2dffe
dff2dffe -direct $dff $dffe dff2dffe -unmap
tee -o result.log dump
synth -top top
dff2dffe -direct $_DFF_P_ $_DFFE_PP_
dff2dffe -unmap flatten opt opt_rmdff write_verilog synth.v