gcc/testsuite/gnat.dg/opt8.adb

   1 -- { dg-do compile }
   2 -- { dg-options "-O2" }
   3
   4 with Opt8_Pkg;
   5
   6 package body Opt8 is
   7
   8     function Content_Value (Rec : Kappa_Component_Rec)
   9         return Value_Number is
  10     begin
  11         return Opt8_Pkg.Id_To_VN (Rec.Content_VN);
  12     end;
  13
  14     function Possible_Values_Count (V: Kappa_Component_Ptr) return Natural is
  15         Result : Natural := 0;
  16         List : Kappa_Component_Ptr := V;
  17     begin
  18         while List /= null loop
  19             Result := Result +1;
  20             List := List.Next;
  21         end loop;
  22         return Result;
  23     end;
  24
  25     function VN_Complexity (Val : Value_Number; N : Natural)
  26         return Natural is
  27         Result : Natural := 0;
  28       begin
  29         case Val.Kind is
  30             when Membership_VN =>
  31                 Result :=  VN_Complexity(Val, N);
  32             when Selected_Address_VN =>
  33                 Result :=  VN_Complexity(Val, N) + 1;
  34             when Kappa_VN =>
  35                 Result := Possible_Values_Count(Val.Possible_New_Values)*3;
  36                 if Val.Use_Default then
  37                     if Result < N then
  38                       Result := Result +
  39                           VN_Complexity(Content_Value (Val.old_Value), N);
  40                     end if;
  41                 end if;
  42             when others =>
  43               Result := 0;
  44           end case;
  45         return Result;
  46     end;
  47
  48 end Opt8;