Map local variables in IR to their original names

lib/Language/Elna/Backend/Intermediate.hs

@@ -1,11 +1,13 @@
 module Language.Elna.Backend.Intermediate
-    ( Operand(..)
+    ( ProcedureQuadruples(..)
+    , Operand(..)
     , Quadruple(..)
     , Label(..)
     , Variable(..)
     ) where
 
 import Data.Int (Int32)
+import Data.Vector (Vector)
 import Data.Word (Word32)
 import Data.Text (Text)
 import qualified Data.Text as Text
@@ -30,6 +32,11 @@ data Operand v
     | VariableOperand v
     deriving (Eq, Show)
 
+data ProcedureQuadruples v = ProcedureQuadruples
+    { quadruples :: Vector (Quadruple v)
+    , stackSize :: Word32
+    } deriving (Eq, Show)
+
 data Quadruple v
     = StartQuadruple
     | StopQuadruple