Pfthb

I am trying to use either Align or Tabularize to take the following code:

 // UDW
 input [UDW_WIDTH-1:0] udw_data;
 input [TYPE_WIDTH-1:0] udw_type;
 input udw_valid;
 output udw_ready;
 // UniClkPktGen
 input [UTW_DATA_W-1:0] utw_data_in;
 input utw_valid_in;
 input [FREQOFFSET_W-1:0] freqOffset;
 input [ACCDELAY_W-1:0] accDelay;
 // RIF 
 input [31:0] rif_add_bus;
 input [31:0] rif_data_wr;
 input [3:0] rif_byte_en;
 input rif_wr;
 input rif_rd;
 output [31:0] rif_data_rd;
 output rif_ack;

To be aligned to this:

 // UDW
 input [UDW_WIDTH-1:0] udw_data;
 input [TYPE_WIDTH-1:0] udw_type;
 input udw_valid;
 output udw_ready;
 // UniClkPktGen
 input [UTW_DATA_W-1:0] utw_data_in;
 input utw_valid_in;
 input [FREQOFFSET_W-1:0] freqOffset;
 input [ACCDELAY_W-1:0] accDelay;
 // RIF 
 input [31:0] rif_add_bus;
 input [31:0] rif_data_wr;
 input [3:0] rif_byte_en;
 input rif_wr;
 input rif_rd;
 output [31:0] rif_data_rd;
 output rif_ack;

As you can see, sometimes there will be square brackets before the variable name, some time won't. Comments could be in the middle, I would like them to be ignored. I want to keep the space before the input/output.
I tried some regex, but couldn't manage to do it.

Ok I have managed to do it with easy-align (thanks Doktor OSwaldo).
I used the advance examples :
https://github.com/junegunn/vim-easy-align/blob/master/EXAMPLES.md

I took this code and added it to ~/.vim/autoload/easy_align.vim (taken from EXAMPLES.md above).

let g:easy_align_delimiters['d'] = 
 'pattern': ' zeS+s*[;=]',
 'left_margin': 0, 'right_margin': 0
 

I don't fully understand the pattern so I will not try to explain it.
But it works :)