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|
{-# LANGUAGE CPP #-}
-- -----------------------------------------------------------------------------
--
-- (c) The University of Glasgow 1993-2004
--
-- The native code generator's monad.
--
-- -----------------------------------------------------------------------------
module NCGMonad (
NatM_State(..), mkNatM_State,
NatM, -- instance Monad
initNat,
addImportNat,
getUniqueNat,
mapAccumLNat,
setDeltaNat,
getDeltaNat,
getThisModuleNat,
getBlockIdNat,
getNewLabelNat,
getNewRegNat,
getNewRegPairNat,
getPicBaseMaybeNat,
getPicBaseNat,
getDynFlags,
getModLoc,
getFileId,
getDebugBlock,
DwarfFiles
)
where
#include "HsVersions.h"
import GhcPrelude
import Reg
import Format
import TargetReg
import BlockId
import Hoopl.Collections
import Hoopl.Label
import CLabel ( CLabel, mkAsmTempLabel )
import Debug
import FastString ( FastString )
import UniqFM
import UniqSupply
import Unique ( Unique )
import DynFlags
import Module
import Control.Monad ( liftM, ap )
data NatM_State
= NatM_State {
natm_us :: UniqSupply,
natm_delta :: Int,
natm_imports :: [(CLabel)],
natm_pic :: Maybe Reg,
natm_dflags :: DynFlags,
natm_this_module :: Module,
natm_modloc :: ModLocation,
natm_fileid :: DwarfFiles,
natm_debug_map :: LabelMap DebugBlock
}
type DwarfFiles = UniqFM (FastString, Int)
newtype NatM result = NatM (NatM_State -> (result, NatM_State))
unNat :: NatM a -> NatM_State -> (a, NatM_State)
unNat (NatM a) = a
mkNatM_State :: UniqSupply -> Int -> DynFlags -> Module -> ModLocation ->
DwarfFiles -> LabelMap DebugBlock -> NatM_State
mkNatM_State us delta dflags this_mod
= NatM_State us delta [] Nothing dflags this_mod
initNat :: NatM_State -> NatM a -> (a, NatM_State)
initNat init_st m
= case unNat m init_st of { (r,st) -> (r,st) }
instance Functor NatM where
fmap = liftM
instance Applicative NatM where
pure = returnNat
(<*>) = ap
instance Monad NatM where
(>>=) = thenNat
instance MonadUnique NatM where
getUniqueSupplyM = NatM $ \st ->
case splitUniqSupply (natm_us st) of
(us1, us2) -> (us1, st {natm_us = us2})
getUniqueM = NatM $ \st ->
case takeUniqFromSupply (natm_us st) of
(uniq, us') -> (uniq, st {natm_us = us'})
thenNat :: NatM a -> (a -> NatM b) -> NatM b
thenNat expr cont
= NatM $ \st -> case unNat expr st of
(result, st') -> unNat (cont result) st'
returnNat :: a -> NatM a
returnNat result
= NatM $ \st -> (result, st)
mapAccumLNat :: (acc -> x -> NatM (acc, y))
-> acc
-> [x]
-> NatM (acc, [y])
mapAccumLNat _ b []
= return (b, [])
mapAccumLNat f b (x:xs)
= do (b__2, x__2) <- f b x
(b__3, xs__2) <- mapAccumLNat f b__2 xs
return (b__3, x__2:xs__2)
getUniqueNat :: NatM Unique
getUniqueNat = NatM $ \ st ->
case takeUniqFromSupply $ natm_us st of
(uniq, us') -> (uniq, st {natm_us = us'})
instance HasDynFlags NatM where
getDynFlags = NatM $ \ st -> (natm_dflags st, st)
getDeltaNat :: NatM Int
getDeltaNat = NatM $ \ st -> (natm_delta st, st)
setDeltaNat :: Int -> NatM ()
setDeltaNat delta = NatM $ \ st -> ((), st {natm_delta = delta})
getThisModuleNat :: NatM Module
getThisModuleNat = NatM $ \ st -> (natm_this_module st, st)
addImportNat :: CLabel -> NatM ()
addImportNat imp
= NatM $ \ st -> ((), st {natm_imports = imp : natm_imports st})
getBlockIdNat :: NatM BlockId
getBlockIdNat
= do u <- getUniqueNat
return (mkBlockId u)
getNewLabelNat :: NatM CLabel
getNewLabelNat
= do u <- getUniqueNat
return (mkAsmTempLabel u)
getNewRegNat :: Format -> NatM Reg
getNewRegNat rep
= do u <- getUniqueNat
dflags <- getDynFlags
return (RegVirtual $ targetMkVirtualReg (targetPlatform dflags) u rep)
getNewRegPairNat :: Format -> NatM (Reg,Reg)
getNewRegPairNat rep
= do u <- getUniqueNat
dflags <- getDynFlags
let vLo = targetMkVirtualReg (targetPlatform dflags) u rep
let lo = RegVirtual $ targetMkVirtualReg (targetPlatform dflags) u rep
let hi = RegVirtual $ getHiVirtualRegFromLo vLo
return (lo, hi)
getPicBaseMaybeNat :: NatM (Maybe Reg)
getPicBaseMaybeNat
= NatM (\state -> (natm_pic state, state))
getPicBaseNat :: Format -> NatM Reg
getPicBaseNat rep
= do mbPicBase <- getPicBaseMaybeNat
case mbPicBase of
Just picBase -> return picBase
Nothing
-> do
reg <- getNewRegNat rep
NatM (\state -> (reg, state { natm_pic = Just reg }))
getModLoc :: NatM ModLocation
getModLoc
= NatM $ \ st -> (natm_modloc st, st)
getFileId :: FastString -> NatM Int
getFileId f = NatM $ \st ->
case lookupUFM (natm_fileid st) f of
Just (_,n) -> (n, st)
Nothing -> let n = 1 + sizeUFM (natm_fileid st)
fids = addToUFM (natm_fileid st) f (f,n)
in n `seq` fids `seq` (n, st { natm_fileid = fids })
getDebugBlock :: Label -> NatM (Maybe DebugBlock)
getDebugBlock l = NatM $ \st -> (mapLookup l (natm_debug_map st), st)
|
