read_verilog <<EOT
module top(input a, output y);
assign y = !a;
endmodule
EOT

prep -top top
write_verilog write_gzip.v.gz
design -reset

! rm -f write_gzip.v
! gunzip write_gzip.v.gz
read_verilog write_gzip.v
! rm -f write_gzip.v
hierarchy -top top
select -assert-any top