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 (assocs)
import Data.List (partition)
import Language.Syntactic

import Feldspar.Core.Types (Type,defaultSize)
import Feldspar.Core.Interpretation
import Feldspar.Core.Constructs.NoInline
import Feldspar.Compiler.Imperative.Representation (Variable(..),
                                                    ActualParameter(..),
                                                    Entity(..), typeof)
import Feldspar.Compiler.Imperative.FromCore.Interpretation
import Feldspar.Compiler.Imperative.Frontend

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

    compileProgSym (C' NoInline) info (Just loc) (p :* Nil) = do
        let args = [mkVariable (compileTypeRep t (defaultSize t)) v
                   | (v,SomeType t) <- assocs $ infoVars info
                   ]
        (_, b)  <- confiscateBlock $ compileProg (Just loc) p
        let isInParam v = vName v /= lName loc
        let (ins,outs) = partition isInParam args
        funId  <- freshId
        let funname = "noinline" ++ show funId
        tellDef [Proc funname ins outs $ Just b]
        let ins' = map (\v -> ValueParameter $ varToExpr $ Variable (typeof v) (vName v)) ins
        tellProg [call funname $ ins' ++ [ValueParameter loc]]