yosys/tests/arch/gowin/compare.ys

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read_verilog compare.v
hierarchy -top top
proc
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 5 t:ALU