reversed ranges

[wsipak]

WIP follow-up to (and based on) #521

I think this might be fixed by #533 and not needed anymore.

Input:

typedef logic [3:0][7:0] my_struct_packed_t;
module single_range_dot_access (
    input  my_struct_packed_t x,
    output my_struct_packed_t y
);
   assign y[2][1] = x[0][0];
endmodule : single_range_dot_access

Output:

module single_range_dot_access(x, y);
  (* wiretype = "\my_struct_packed_t" *)
  input [31:0] x;
  (* wiretype = "\my_struct_packed_t" *)
  output [31:0] y;
  assign y[9:9] = x[0:0];
  /** AST_TYPEDEF **/
endmodule

The indexes in the assignment of y[2][1] = are calculated wrongly.
The reason is that the plugin reverses some ranges and then calculates 2*4+1 instead of 2*8+1.