Split the allocator and add state to it
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@ -14,6 +14,9 @@ import Language.Elna.Backend.Intermediate
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, Variable(..)
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)
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import Language.Elna.Location (Identifier(..))
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import Control.Monad.Trans.Reader (ReaderT, asks, runReaderT)
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import Control.Monad.Trans.State (State, runState)
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import GHC.Records (HasField(..))
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data Store r
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= RegisterStore r
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@ -23,61 +26,108 @@ newtype MachineConfiguration r = MachineConfiguration
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{ temporaryRegisters :: [r]
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}
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newtype Allocator r a = Allocator
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{ runAllocator :: ReaderT (MachineConfiguration r) (State Word32) a
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}
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instance forall r. Functor (Allocator r)
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where
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fmap f = Allocator . fmap f . runAllocator
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instance forall r. Applicative (Allocator r)
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where
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pure = Allocator . pure
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(Allocator x) <*> (Allocator y) = Allocator $ x <*> y
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instance forall r. Monad (Allocator r)
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where
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(Allocator allocator) >>= f = Allocator $ allocator >>= (runAllocator . f)
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allocate
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:: forall r
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. MachineConfiguration r
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-> HashMap Identifier (Vector (Quadruple Variable))
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-> HashMap Identifier (ProcedureQuadruples (Store r))
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allocate MachineConfiguration{..} = fmap function
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allocate machineConfiguration = fmap function
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where
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function :: Vector (Quadruple Variable) -> ProcedureQuadruples (Store r)
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function quadruples' = ProcedureQuadruples
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{ quadruples = quadruple <$> quadruples'
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{ quadruples = fst
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$ flip runState 0
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$ flip runReaderT machineConfiguration
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$ runAllocator
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$ mapM quadruple quadruples'
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, stackSize = 0
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}
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quadruple :: Quadruple Variable -> Quadruple (Store r)
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quadruple = \case
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StartQuadruple -> StartQuadruple
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StopQuadruple -> StopQuadruple
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ParameterQuadruple operand1 ->
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ParameterQuadruple (operand operand1)
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CallQuadruple name count -> CallQuadruple name count
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AddQuadruple operand1 operand2 variable
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-> AddQuadruple (operand operand1) (operand operand2)
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$ storeVariable variable
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SubtractionQuadruple operand1 operand2 variable
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-> SubtractionQuadruple (operand operand1) (operand operand2)
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$ storeVariable variable
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NegationQuadruple operand1 variable
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-> NegationQuadruple (operand operand1)
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$ storeVariable variable
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ProductQuadruple operand1 operand2 variable
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-> ProductQuadruple (operand operand1) (operand operand2)
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$ storeVariable variable
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DivisionQuadruple operand1 operand2 variable
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-> DivisionQuadruple (operand operand1) (operand operand2)
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$ storeVariable variable
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LabelQuadruple label -> LabelQuadruple label
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GoToQuadruple label -> GoToQuadruple label
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EqualQuadruple operand1 operand2 goToLabel ->
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EqualQuadruple (operand operand1) (operand operand2) goToLabel
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NonEqualQuadruple operand1 operand2 goToLabel ->
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NonEqualQuadruple (operand operand1) (operand operand2) goToLabel
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LessQuadruple operand1 operand2 goToLabel ->
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LessQuadruple (operand operand1) (operand operand2) goToLabel
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GreaterQuadruple operand1 operand2 goToLabel ->
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GreaterQuadruple (operand operand1) (operand operand2) goToLabel
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LessOrEqualQuadruple operand1 operand2 goToLabel ->
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LessOrEqualQuadruple (operand operand1) (operand operand2) goToLabel
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GreaterOrEqualQuadruple operand1 operand2 goToLabel ->
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GreaterOrEqualQuadruple (operand operand1) (operand operand2) goToLabel
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AssignQuadruple operand1 variable ->
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AssignQuadruple (operand operand1) $ storeVariable variable
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operand :: Operand Variable -> Operand (Store r)
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operand (IntOperand x) = IntOperand x
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operand (VariableOperand variableOperand) =
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VariableOperand $ storeVariable variableOperand
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storeVariable (TempVariable index) = RegisterStore
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$ temporaryRegisters !! fromIntegral index
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storeVariable (LocalVariable index) = RegisterStore
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$ temporaryRegisters !! pred (length temporaryRegisters - fromIntegral index)
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quadruple :: Quadruple Variable -> Allocator r (Quadruple (Store r))
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quadruple = \case
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StartQuadruple -> pure StartQuadruple
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StopQuadruple -> pure StopQuadruple
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ParameterQuadruple operand1 -> do
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operand1' <- operand operand1
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pure $ ParameterQuadruple operand1'
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CallQuadruple name count -> pure $ CallQuadruple name count
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AddQuadruple operand1 operand2 variable -> do
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operand1' <- operand operand1
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operand2' <- operand operand2
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AddQuadruple operand1' operand2' <$> storeVariable variable
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SubtractionQuadruple operand1 operand2 variable -> do
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operand1' <- operand operand1
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operand2' <- operand operand2
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SubtractionQuadruple operand1' operand2' <$> storeVariable variable
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NegationQuadruple operand1 variable -> do
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operand1' <- operand operand1
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NegationQuadruple operand1' <$> storeVariable variable
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ProductQuadruple operand1 operand2 variable -> do
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operand1' <- operand operand1
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operand2' <- operand operand2
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ProductQuadruple operand1' operand2' <$> storeVariable variable
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DivisionQuadruple operand1 operand2 variable -> do
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operand1' <- operand operand1
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operand2' <- operand operand2
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DivisionQuadruple operand1' operand2' <$> storeVariable variable
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LabelQuadruple label -> pure $ LabelQuadruple label
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GoToQuadruple label -> pure $ GoToQuadruple label
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EqualQuadruple operand1 operand2 goToLabel -> do
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operand1' <- operand operand1
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operand2' <- operand operand2
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pure $ EqualQuadruple operand1' operand2' goToLabel
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NonEqualQuadruple operand1 operand2 goToLabel -> do
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operand1' <- operand operand1
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operand2' <- operand operand2
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pure $ NonEqualQuadruple operand1' operand2' goToLabel
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LessQuadruple operand1 operand2 goToLabel -> do
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operand1' <- operand operand1
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operand2' <- operand operand2
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pure $ LessQuadruple operand1' operand2' goToLabel
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GreaterQuadruple operand1 operand2 goToLabel -> do
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operand1' <- operand operand1
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operand2' <- operand operand2
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pure $ GreaterQuadruple operand1' operand2' goToLabel
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LessOrEqualQuadruple operand1 operand2 goToLabel -> do
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operand1' <- operand operand1
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operand2' <- operand operand2
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pure $ LessOrEqualQuadruple operand1' operand2' goToLabel
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GreaterOrEqualQuadruple operand1 operand2 goToLabel -> do
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operand1' <- operand operand1
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operand2' <- operand operand2
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pure $ GreaterOrEqualQuadruple operand1' operand2' goToLabel
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AssignQuadruple operand1 variable -> do
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operand1' <- operand operand1
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AssignQuadruple operand1' <$> storeVariable variable
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operand :: Operand Variable -> Allocator r (Operand (Store r))
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operand (IntOperand x) = pure $ IntOperand x
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operand (VariableOperand variableOperand) =
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VariableOperand <$> storeVariable variableOperand
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storeVariable :: Variable -> Allocator r (Store r)
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storeVariable (TempVariable index) = do
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temporaryRegisters' <- Allocator $ asks $ getField @"temporaryRegisters"
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pure $ RegisterStore
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$ temporaryRegisters' !! fromIntegral index
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storeVariable (LocalVariable index) = do
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temporaryRegisters' <- Allocator $ asks $ getField @"temporaryRegisters"
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pure $ RegisterStore
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$ temporaryRegisters' !! pred (length temporaryRegisters' - fromIntegral index)
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