Added "write_smt2 -regs"
Added "write_smt2 -regs"

cliffordwolf/yosys,cliffordwolf/yosys,SymbiFlow/yosys,cliffordwolf/yosys,YosysHQ/yosys,swallat/yosys,antmicro/yosys,YosysHQ/yosys,YosysHQ/yosys,azonenberg/yosys,antmicro/yosys,SymbiFlow/yosys,swallat/yosys,SymbiFlow/yosys,SymbiFlow/yosys,swallat/yosys,swallat/yosys,YosysHQ/yosys,YosysHQ/yosys,cliffordwolf/yosys,antmicro/yosys,cliffordwolf/yosys,SymbiFlow/yosys,SymbiFlow/yosys,swallat/yosys,YosysHQ/yosys,cliffordwolf/yosys,antmicro/yosys,antmicro/yosys,azonenberg/yosys,azonenberg/yosys,azonenberg/yosys,azonenberg/yosys,swallat/yosys,antmicro/yosys,antmicro/yosys,SymbiFlow/yosys,swallat/yosys,YosysHQ/yosys,swallat/yosys,swallat/yosys,antmicro/yosys,cliffordwolf/yosys,cliffordwolf/yosys,azonenberg/yosys,cliffordwolf/yosys,SymbiFlow/yosys,YosysHQ/yosys,azonenberg/yosys,azonenberg/yosys,azonenberg/yosys