read_rtlil << EOT
module \top
  wire input 1 \A
  wire output 2 \Y
  wire output 3 \N

  cell \sg13g2_and2_1 \sub1
    connect \A \A
    connect \B 1'0
    connect \Y \Y
  end

  cell \child \sequential
    connect \A \A
    connect \B 1'0
    connect \R 1'0
    connect \Y \Y
    connect \N \N
  end

  cell \child \sequential1
    connect \A \A
    connect \B 1'0
    connect \R 1'0
    connect \Y \Y
    connect \N \N
  end

  cell \sg13g2_and2_1 \sub2
    connect \A \A
    connect \B 1'0
    connect \Y \Y
  end
end

module \child
  wire input 1 \A
  wire input 2 \B
  wire input 3 \R

  wire output 4 \Y
  wire output 5 \N

  cell \sg13g2_dfrbp_1 \sequential_ff
    connect \CLK \A
    connect \D \B
    connect \Q \Y
    connect \Q_N \N
    connect \RESET_B \R
  end

end
EOT
logger -expect log "4  112.493        2   18.144 cells" 2 
logger -expect log "2   18.144        2   18.144   sg13g2_and2_1" 2
logger -expect log "2   94.349        -        -   sg13g2_dfrbp_1" 2
logger -expect log "2   94.349        2        - submodules" 2
logger -expect-no-warnings
stat -liberty ../../tests/liberty/foundry_data/sg13g2_stdcell_typ_1p20V_25C.lib.filtered.gz -top \top -hierarchy