Fixes defined variables, fixes live variables, implements reduces registers, fixes risc semantic

lib/miniImp/RISC.ml

@@ -59,7 +59,8 @@ module RISCAssembly = struct
 
   type t = {
     code : risci list;
-    inputval: int option
+    inputval: int option;
+    inputoutputreg: (register * register) option;
   }
 
   let pp_risci (ppf: out_channel) (v: risci) : unit =
@@ -285,4 +286,9 @@ let rec helper
 let convert (prg: CfgRISC.RISCCfg.t) : RISCAssembly.t =
   {code = (helper prg (Option.get prg.initial) [] |> fst |>
            List.append ([Label "main"] : RISCAssembly.risci list));
-   inputval = prg.inputVal}
+   inputval = prg.inputVal;
+   inputoutputreg =
+     match prg.inputOutputVar with
+       None -> None
+     | Some (i, o) -> Some ({index = i}, {index = o})
+  }