84 lines
3.5 KiB
Haskell
84 lines
3.5 KiB
Haskell
module Language.Elna.Backend.Allocator
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( MachineConfiguration(..)
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, Store(..)
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, allocate
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) where
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import Data.HashMap.Strict (HashMap)
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import Data.Word (Word32)
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import Data.Vector (Vector)
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import Language.Elna.Backend.Intermediate
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( ProcedureQuadruples(..)
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, Operand(..)
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, Quadruple(..)
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, Variable(..)
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)
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import Language.Elna.Location (Identifier(..))
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data Store r
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= RegisterStore r
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| StackStore Word32 r
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newtype MachineConfiguration r = MachineConfiguration
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{ temporaryRegisters :: [r]
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}
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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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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 <$> quadruples'
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, stackSize = 0
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}
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quadruple :: Quadruple Variable -> Quadruple (Store r)
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quadruple = \case
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StartQuadruple -> StartQuadruple
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StopQuadruple -> StopQuadruple
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ParameterQuadruple operand1 ->
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ParameterQuadruple (operand operand1)
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CallQuadruple name count -> CallQuadruple name count
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AddQuadruple operand1 operand2 variable
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-> AddQuadruple (operand operand1) (operand operand2)
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$ 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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