verilog-auto-star-save

verilog-auto-star-save is a variable defined in `verilog-mode.el'.
Its value is

nil

• This variable is safe as a file local variable if its value
  satisfies the predicate `verilog-booleanp'.

Documentation:
Non-nil means save to disk SystemVerilog .* instance expansions.
A nil value indicates direct connections will be removed before saving.
Only meaningful to those created due to `verilog-auto-star-expand' being set.

Instead of setting this, you may want to use /*AUTOINST*/, which will
always be saved.

You can customize this variable.