NoInline.hs

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{-# LANGUAGE GADTs #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE OverlappingInstances #-}
{-# LANGUAGE UndecidableInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}

module Feldspar.Compiler.Imperative.FromCore.NoInline where

import Data.Map (elems)
import Data.List (partition)
import Language.Syntactic

import Feldspar.Core.Types (Type)
import Feldspar.Core.Constructs.NoInline
import Feldspar.Transformation (transform, Result(..))
import Feldspar.Compiler.Imperative.FromCore.Interpretation
import Feldspar.Compiler.Imperative.Frontend hiding (Type,Variable)
import Feldspar.Compiler.Imperative.Plugin.CollectFreeVars
import qualified Feldspar.Compiler.Imperative.Frontend as Front

instance Compile dom dom => Compile (NoInline :|| Type) dom
  where
    compileExprSym = compileProgFresh

    compileProgSym (C' NoInline) _ loc (p :* Nil) = do
        (_, Bl ds t)  <- confiscateBlock $ compileProg loc p
        let b = Block ds t
        let vs = elems $ up $ transform Collect () () $ Front.fromInterface b
        let isInParam v = Front.vName v /= Front.lName loc
        let (ins,outs) = partition isInParam vs
        funId  <- freshId
        let funname = "noinline" ++ show funId
        tellDef [ProcDf funname ins outs b]
        let ins' = map (\v -> Front.In $ Front.Var (vType v) (Front.vName v)) ins
        tellProg [Call funname $ ins' ++ [Out loc]]