module VectBuiltIn (
- Builtins(..), sumTyCon, prodTyCon,
- initBuiltins, initBuiltinTyCons, initBuiltinPAs, initBuiltinPRs
-) where
+ Builtins(..), sumTyCon, prodTyCon, uarrTy, intPrimArrayTy,
+ combinePAVar,
+ initBuiltins, initBuiltinVars, initBuiltinTyCons, initBuiltinDataCons,
+ initBuiltinPAs, initBuiltinPRs,
+ initBuiltinBoxedTyCons,
-#include "HsVersions.h"
+ primMethod, primPArray
+) where
import DsMonad
import IfaceEnv ( lookupOrig )
-import Module ( Module )
-import DataCon ( DataCon )
+import Module
+import DataCon ( DataCon, dataConName, dataConWorkId )
import TyCon ( TyCon, tyConName, tyConDataCons )
import Var ( Var )
import Id ( mkSysLocal )
-import Name ( Name )
-import OccName ( mkVarOccFS, mkOccNameFS, tcName )
+import Name ( Name, getOccString )
+import NameEnv
+import OccName
import TypeRep ( funTyCon )
-import TysPrim ( intPrimTy )
-import TysWiredIn ( unitTyCon, tupleTyCon, intTyConName )
-import PrelNames
+import Type ( Type, mkTyConApp )
+import TysPrim
+import TysWiredIn ( unitTyCon, unitDataCon,
+ tupleTyCon, tupleCon,
+ intTyCon, intTyConName, intTy,
+ doubleTyCon, doubleTyConName,
+ boolTyCon, boolTyConName, trueDataCon, falseDataCon,
+ parrTyConName )
+import PrelNames ( gHC_PARR )
import BasicTypes ( Boxity(..) )
import FastString
import Data.Array
import Control.Monad ( liftM, zipWithM )
+import Data.List ( unzip4 )
mAX_NDP_PROD :: Int
-mAX_NDP_PROD = 3
+mAX_NDP_PROD = 5
mAX_NDP_SUM :: Int
mAX_NDP_SUM = 3
+mAX_NDP_COMBINE :: Int
+mAX_NDP_COMBINE = 2
+
+mkNDPModule :: FastString -> Module
+mkNDPModule m = mkModule ndpPackageId (mkModuleNameFS m)
+
+nDP_UARR,
+ nDP_PARRAY,
+ nDP_REPR,
+ nDP_CLOSURE,
+ nDP_UNBOXED,
+ nDP_INSTANCES,
+ nDP_COMBINATORS,
+ nDP_PRELUDE_PARR,
+ nDP_PRELUDE_INT,
+ nDP_PRELUDE_DOUBLE,
+ nDP_PRELUDE_BOOL,
+ nDP_PRELUDE_TUPLE :: Module
+
+nDP_UARR = mkNDPModule (fsLit "Data.Array.Parallel.Unlifted.Flat.UArr")
+nDP_PARRAY = mkNDPModule (fsLit "Data.Array.Parallel.Lifted.PArray")
+nDP_REPR = mkNDPModule (fsLit "Data.Array.Parallel.Lifted.Repr")
+nDP_CLOSURE = mkNDPModule (fsLit "Data.Array.Parallel.Lifted.Closure")
+nDP_UNBOXED = mkNDPModule (fsLit "Data.Array.Parallel.Lifted.Unboxed")
+nDP_INSTANCES = mkNDPModule (fsLit "Data.Array.Parallel.Lifted.Instances")
+nDP_COMBINATORS = mkNDPModule (fsLit "Data.Array.Parallel.Lifted.Combinators")
+
+nDP_PRELUDE_PARR = mkNDPModule (fsLit "Data.Array.Parallel.Prelude.Base.PArr")
+nDP_PRELUDE_INT = mkNDPModule (fsLit "Data.Array.Parallel.Prelude.Base.Int")
+nDP_PRELUDE_DOUBLE = mkNDPModule (fsLit "Data.Array.Parallel.Prelude.Base.Double")
+nDP_PRELUDE_BOOL = mkNDPModule (fsLit "Data.Array.Parallel.Prelude.Base.Bool")
+nDP_PRELUDE_TUPLE = mkNDPModule (fsLit "Data.Array.Parallel.Prelude.Base.Tuple")
+
data Builtins = Builtins {
parrayTyCon :: TyCon
, paTyCon :: TyCon
, preprTyCon :: TyCon
, prTyCon :: TyCon
, prDataCon :: DataCon
+ , uarrTyCon :: TyCon
+ , voidTyCon :: TyCon
+ , wrapTyCon :: TyCon
+ , enumerationTyCon :: TyCon
, sumTyCons :: Array Int TyCon
, closureTyCon :: TyCon
+ , voidVar :: Var
, mkPRVar :: Var
, mkClosureVar :: Var
, applyClosureVar :: Var
, mkClosurePVar :: Var
, applyClosurePVar :: Var
+ , replicatePAIntPrimVar :: Var
+ , upToPAIntPrimVar :: Var
+ , selectPAIntPrimVar :: Var
+ , truesPABoolPrimVar :: Var
, lengthPAVar :: Var
, replicatePAVar :: Var
, emptyPAVar :: Var
- -- , packPAVar :: Var
- -- , combinePAVar :: Var
- , intEqPAVar :: Var
+ , packPAVar :: Var
+ , combinePAVars :: Array Int Var
, liftingContext :: Var
}
+uarrTy :: Type -> Builtins -> Type
+uarrTy ty bi = mkTyConApp (uarrTyCon bi) [ty]
+
+intPrimArrayTy :: Builtins -> Type
+intPrimArrayTy = uarrTy intTy
+
sumTyCon :: Int -> Builtins -> TyCon
sumTyCon n bi
| n >= 2 && n <= mAX_NDP_SUM = sumTyCons bi ! n
prodTyCon :: Int -> Builtins -> TyCon
prodTyCon n bi
- | n >= 2 && n <= mAX_NDP_PROD = tupleTyCon Boxed n
+ | n == 1 = wrapTyCon bi
+ | n >= 0 && n <= mAX_NDP_PROD = tupleTyCon Boxed n
| otherwise = pprPanic "prodTyCon" (ppr n)
+combinePAVar :: Int -> Builtins -> Var
+combinePAVar n bi
+ | n >= 2 && n <= mAX_NDP_COMBINE = combinePAVars bi ! n
+ | otherwise = pprPanic "combinePAVar" (ppr n)
initBuiltins :: DsM Builtins
initBuiltins
= do
- parrayTyCon <- dsLookupTyCon parrayTyConName
- paTyCon <- dsLookupTyCon paTyConName
+ parrayTyCon <- externalTyCon nDP_PARRAY (fsLit "PArray")
+ paTyCon <- externalTyCon nDP_PARRAY (fsLit "PA")
let [paDataCon] = tyConDataCons paTyCon
- preprTyCon <- dsLookupTyCon preprTyConName
- prTyCon <- dsLookupTyCon prTyConName
+ preprTyCon <- externalTyCon nDP_PARRAY (fsLit "PRepr")
+ prTyCon <- externalTyCon nDP_PARRAY (fsLit "PR")
let [prDataCon] = tyConDataCons prTyCon
- closureTyCon <- dsLookupTyCon closureTyConName
+ uarrTyCon <- externalTyCon nDP_UARR (fsLit "UArr")
+ closureTyCon <- externalTyCon nDP_CLOSURE (fsLit ":->")
- sum_tcs <- mapM (lookupExternalTyCon nDP_REPR)
+ voidTyCon <- externalTyCon nDP_REPR (fsLit "Void")
+ wrapTyCon <- externalTyCon nDP_REPR (fsLit "Wrap")
+ enumerationTyCon <- externalTyCon nDP_REPR (fsLit "Enumeration")
+ sum_tcs <- mapM (externalTyCon nDP_REPR)
[mkFastString ("Sum" ++ show i) | i <- [2..mAX_NDP_SUM]]
let sumTyCons = listArray (2, mAX_NDP_SUM) sum_tcs
- mkPRVar <- dsLookupGlobalId mkPRName
- mkClosureVar <- dsLookupGlobalId mkClosureName
- applyClosureVar <- dsLookupGlobalId applyClosureName
- mkClosurePVar <- dsLookupGlobalId mkClosurePName
- applyClosurePVar <- dsLookupGlobalId applyClosurePName
- lengthPAVar <- dsLookupGlobalId lengthPAName
- replicatePAVar <- dsLookupGlobalId replicatePAName
- emptyPAVar <- dsLookupGlobalId emptyPAName
- -- packPAVar <- dsLookupGlobalId packPAName
- -- combinePAVar <- dsLookupGlobalId combinePAName
- intEqPAVar <- dsLookupGlobalId intEqPAName
-
- liftingContext <- liftM (\u -> mkSysLocal FSLIT("lc") u intPrimTy)
+ voidVar <- externalVar nDP_REPR (fsLit "void")
+ mkPRVar <- externalVar nDP_PARRAY (fsLit "mkPR")
+ mkClosureVar <- externalVar nDP_CLOSURE (fsLit "mkClosure")
+ applyClosureVar <- externalVar nDP_CLOSURE (fsLit "$:")
+ mkClosurePVar <- externalVar nDP_CLOSURE (fsLit "mkClosureP")
+ applyClosurePVar <- externalVar nDP_CLOSURE (fsLit "$:^")
+ replicatePAIntPrimVar <- externalVar nDP_UNBOXED (fsLit "replicatePA_Int#")
+ upToPAIntPrimVar <- externalVar nDP_UNBOXED (fsLit "upToPA_Int#")
+ selectPAIntPrimVar <- externalVar nDP_UNBOXED (fsLit "selectPA_Int#")
+ truesPABoolPrimVar <- externalVar nDP_UNBOXED (fsLit "truesPA_Bool#")
+ lengthPAVar <- externalVar nDP_PARRAY (fsLit "lengthPA#")
+ replicatePAVar <- externalVar nDP_PARRAY (fsLit "replicatePA#")
+ emptyPAVar <- externalVar nDP_PARRAY (fsLit "emptyPA")
+ packPAVar <- externalVar nDP_PARRAY (fsLit "packPA#")
+
+ combines <- mapM (externalVar nDP_PARRAY)
+ [mkFastString ("combine" ++ show i ++ "PA#")
+ | i <- [2..mAX_NDP_COMBINE]]
+ let combinePAVars = listArray (2, mAX_NDP_COMBINE) combines
+
+ liftingContext <- liftM (\u -> mkSysLocal (fsLit "lc") u intPrimTy)
newUnique
return $ Builtins {
, preprTyCon = preprTyCon
, prTyCon = prTyCon
, prDataCon = prDataCon
+ , uarrTyCon = uarrTyCon
+ , voidTyCon = voidTyCon
+ , wrapTyCon = wrapTyCon
+ , enumerationTyCon = enumerationTyCon
, sumTyCons = sumTyCons
, closureTyCon = closureTyCon
+ , voidVar = voidVar
, mkPRVar = mkPRVar
, mkClosureVar = mkClosureVar
, applyClosureVar = applyClosureVar
, mkClosurePVar = mkClosurePVar
, applyClosurePVar = applyClosurePVar
+ , replicatePAIntPrimVar = replicatePAIntPrimVar
+ , upToPAIntPrimVar = upToPAIntPrimVar
+ , selectPAIntPrimVar = selectPAIntPrimVar
+ , truesPABoolPrimVar = truesPABoolPrimVar
, lengthPAVar = lengthPAVar
, replicatePAVar = replicatePAVar
, emptyPAVar = emptyPAVar
- -- , packPAVar = packPAVar
- -- , combinePAVar = combinePAVar
- , intEqPAVar = intEqPAVar
+ , packPAVar = packPAVar
+ , combinePAVars = combinePAVars
, liftingContext = liftingContext
}
-initBuiltinTyCons :: DsM [(Name, TyCon)]
-initBuiltinTyCons
+initBuiltinVars :: Builtins -> DsM [(Var, Var)]
+initBuiltinVars _
= do
- vects <- sequence vs
- return (zip origs vects)
+ uvars <- zipWithM externalVar umods ufs
+ vvars <- zipWithM externalVar vmods vfs
+ cvars <- zipWithM externalVar cmods cfs
+ return $ [(v,v) | v <- map dataConWorkId defaultDataConWorkers]
+ ++ zip (map dataConWorkId cons) cvars
+ ++ zip uvars vvars
+ where
+ (umods, ufs, vmods, vfs) = unzip4 preludeVars
+
+ (cons, cmods, cfs) = unzip3 preludeDataCons
+
+defaultDataConWorkers :: [DataCon]
+defaultDataConWorkers = [trueDataCon, falseDataCon, unitDataCon]
+
+preludeDataCons :: [(DataCon, Module, FastString)]
+preludeDataCons
+ = [mk_tup n nDP_PRELUDE_TUPLE (mkFastString $ "tup" ++ show n) | n <- [2..3]]
where
- (origs, vs) = unzip builtinTyCons
+ mk_tup n mod name = (tupleCon Boxed n, mod, name)
+
+preludeVars :: [(Module, FastString, Module, FastString)]
+preludeVars
+ = [
+ mk gHC_PARR (fsLit "mapP") nDP_COMBINATORS (fsLit "mapPA")
+ , mk gHC_PARR (fsLit "zipWithP") nDP_COMBINATORS (fsLit "zipWithPA")
+ , mk gHC_PARR (fsLit "zipP") nDP_COMBINATORS (fsLit "zipPA")
+ , mk gHC_PARR (fsLit "unzipP") nDP_COMBINATORS (fsLit "unzipPA")
+ , mk gHC_PARR (fsLit "filterP") nDP_COMBINATORS (fsLit "filterPA")
+ , mk gHC_PARR (fsLit "lengthP") nDP_COMBINATORS (fsLit "lengthPA")
+ , mk gHC_PARR (fsLit "replicateP") nDP_COMBINATORS (fsLit "replicatePA")
+ , mk gHC_PARR (fsLit "!:") nDP_COMBINATORS (fsLit "indexPA")
+ , mk gHC_PARR (fsLit "crossMapP") nDP_COMBINATORS (fsLit "crossMapPA")
+ , mk gHC_PARR (fsLit "singletonP") nDP_COMBINATORS (fsLit "singletonPA")
+ , mk gHC_PARR (fsLit "concatP") nDP_COMBINATORS (fsLit "concatPA")
+ , mk gHC_PARR (fsLit "+:+") nDP_COMBINATORS (fsLit "appPA")
+ , mk gHC_PARR (fsLit "emptyP") nDP_PARRAY (fsLit "emptyPA")
+
+ , mk nDP_PRELUDE_INT (fsLit "plus") nDP_PRELUDE_INT (fsLit "plusV")
+ , mk nDP_PRELUDE_INT (fsLit "minus") nDP_PRELUDE_INT (fsLit "minusV")
+ , mk nDP_PRELUDE_INT (fsLit "mult") nDP_PRELUDE_INT (fsLit "multV")
+ , mk nDP_PRELUDE_INT (fsLit "intDiv") nDP_PRELUDE_INT (fsLit "intDivV")
+ , mk nDP_PRELUDE_INT (fsLit "intMod") nDP_PRELUDE_INT (fsLit "intModV")
+ , mk nDP_PRELUDE_INT (fsLit "intSquareRoot") nDP_PRELUDE_INT (fsLit "intSquareRootV")
+ , mk nDP_PRELUDE_INT (fsLit "intSumP") nDP_PRELUDE_INT (fsLit "intSumPA")
+ , mk nDP_PRELUDE_INT (fsLit "enumFromToP") nDP_PRELUDE_INT (fsLit "enumFromToPA")
+ , mk nDP_PRELUDE_INT (fsLit "upToP") nDP_PRELUDE_INT (fsLit "upToPA")
+
+ , mk nDP_PRELUDE_INT (fsLit "eq") nDP_PRELUDE_INT (fsLit "eqV")
+ , mk nDP_PRELUDE_INT (fsLit "neq") nDP_PRELUDE_INT (fsLit "neqV")
+ , mk nDP_PRELUDE_INT (fsLit "le") nDP_PRELUDE_INT (fsLit "leV")
+ , mk nDP_PRELUDE_INT (fsLit "lt") nDP_PRELUDE_INT (fsLit "ltV")
+ , mk nDP_PRELUDE_INT (fsLit "ge") nDP_PRELUDE_INT (fsLit "geV")
+ , mk nDP_PRELUDE_INT (fsLit "gt") nDP_PRELUDE_INT (fsLit "gtV")
+
+ , mk nDP_PRELUDE_DOUBLE (fsLit "plus") nDP_PRELUDE_DOUBLE (fsLit "plusV")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "minus") nDP_PRELUDE_DOUBLE (fsLit "minusV")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "mult") nDP_PRELUDE_DOUBLE (fsLit "multV")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "divide") nDP_PRELUDE_DOUBLE (fsLit "divideV")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "squareRoot") nDP_PRELUDE_DOUBLE (fsLit "squareRootV")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "doubleSumP") nDP_PRELUDE_DOUBLE (fsLit "doubleSumPA")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "minIndexP")
+ nDP_PRELUDE_DOUBLE (fsLit "minIndexPA")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "maxIndexP")
+ nDP_PRELUDE_DOUBLE (fsLit "maxIndexPA")
+
+ , mk nDP_PRELUDE_DOUBLE (fsLit "eq") nDP_PRELUDE_DOUBLE (fsLit "eqV")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "neq") nDP_PRELUDE_DOUBLE (fsLit "neqV")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "le") nDP_PRELUDE_DOUBLE (fsLit "leV")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "lt") nDP_PRELUDE_DOUBLE (fsLit "ltV")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "ge") nDP_PRELUDE_DOUBLE (fsLit "geV")
+ , mk nDP_PRELUDE_DOUBLE (fsLit "gt") nDP_PRELUDE_DOUBLE (fsLit "gtV")
+
+ , mk nDP_PRELUDE_BOOL (fsLit "andP") nDP_PRELUDE_BOOL (fsLit "andPA")
+ , mk nDP_PRELUDE_BOOL (fsLit "orP") nDP_PRELUDE_BOOL (fsLit "orPA")
+
+ -- FIXME: temporary
+ , mk nDP_PRELUDE_PARR (fsLit "fromPArrayP") nDP_PRELUDE_PARR (fsLit "fromPArrayPA")
+ , mk nDP_PRELUDE_PARR (fsLit "toPArrayP") nDP_PRELUDE_PARR (fsLit "toPArrayPA")
+ , mk nDP_PRELUDE_PARR (fsLit "fromNestedPArrayP") nDP_PRELUDE_PARR (fsLit "fromNestedPArrayPA")
+ , mk nDP_PRELUDE_PARR (fsLit "combineP") nDP_COMBINATORS (fsLit "combine2PA")
+ ]
+ where
+ mk = (,,,)
+
+initBuiltinTyCons :: Builtins -> DsM [(Name, TyCon)]
+initBuiltinTyCons bi
+ = do
+ -- parr <- externalTyCon nDP_PRELUDE_PARR (fsLit "PArr")
+ return $ (tyConName funTyCon, closureTyCon bi)
+ : (parrTyConName, parrayTyCon bi)
+
+ -- FIXME: temporary
+ : (tyConName $ parrayTyCon bi, parrayTyCon bi)
+
+ : [(tyConName tc, tc) | tc <- defaultTyCons]
-builtinTyCons :: [(Name, DsM TyCon)]
-builtinTyCons = [(tyConName funTyCon, dsLookupTyCon closureTyConName)]
+defaultTyCons :: [TyCon]
+defaultTyCons = [intTyCon, boolTyCon, doubleTyCon]
+
+initBuiltinDataCons :: Builtins -> [(Name, DataCon)]
+initBuiltinDataCons _ = [(dataConName dc, dc)| dc <- defaultDataCons]
+
+defaultDataCons :: [DataCon]
+defaultDataCons = [trueDataCon, falseDataCon, unitDataCon]
initBuiltinDicts :: [(Name, Module, FastString)] -> DsM [(Name, Var)]
initBuiltinDicts ps
= do
- dicts <- zipWithM lookupExternalVar mods fss
+ dicts <- zipWithM externalVar mods fss
return $ zip tcs dicts
where
(tcs, mods, fss) = unzip3 ps
-initBuiltinPAs = initBuiltinDicts builtinPAs
-
-builtinPAs :: [(Name, Module, FastString)]
-builtinPAs = [
- mk closureTyConName nDP_CLOSURE FSLIT("dPA_Clo")
- , mk unitTyConName nDP_INSTANCES FSLIT("dPA_Unit")
-
- , mk intTyConName nDP_INSTANCES FSLIT("dPA_Int")
- ]
- ++ tups
+initBuiltinPAs :: Builtins -> DsM [(Name, Var)]
+initBuiltinPAs = initBuiltinDicts . builtinPAs
+
+builtinPAs :: Builtins -> [(Name, Module, FastString)]
+builtinPAs bi
+ = [
+ mk (tyConName $ closureTyCon bi) nDP_CLOSURE (fsLit "dPA_Clo")
+ , mk (tyConName $ voidTyCon bi) nDP_REPR (fsLit "dPA_Void")
+ , mk (tyConName $ parrayTyCon bi) nDP_INSTANCES (fsLit "dPA_PArray")
+ , mk unitTyConName nDP_INSTANCES (fsLit "dPA_Unit")
+
+ , mk intTyConName nDP_INSTANCES (fsLit "dPA_Int")
+ , mk doubleTyConName nDP_INSTANCES (fsLit "dPA_Double")
+ , mk boolTyConName nDP_INSTANCES (fsLit "dPA_Bool")
+ ]
+ ++ tups
where
mk name mod fs = (name, mod, fs)
- tups = map mk_tup [2..3]
+ tups = map mk_tup [2..mAX_NDP_PROD]
mk_tup n = mk (tyConName $ tupleTyCon Boxed n)
nDP_INSTANCES
(mkFastString $ "dPA_" ++ show n)
+initBuiltinPRs :: Builtins -> DsM [(Name, Var)]
initBuiltinPRs = initBuiltinDicts . builtinPRs
builtinPRs :: Builtins -> [(Name, Module, FastString)]
builtinPRs bi =
[
- mk (tyConName unitTyCon) nDP_REPR FSLIT("dPR_Unit")
- , mk closureTyConName nDP_CLOSURE FSLIT("dPR_Clo")
+ mk (tyConName unitTyCon) nDP_REPR (fsLit "dPR_Unit")
+ , mk (tyConName $ voidTyCon bi) nDP_REPR (fsLit "dPR_Void")
+ , mk (tyConName $ wrapTyCon bi) nDP_REPR (fsLit "dPR_Wrap")
+ , mk (tyConName $ enumerationTyCon bi) nDP_REPR (fsLit "dPR_Enumeration")
+ , mk (tyConName $ closureTyCon bi) nDP_CLOSURE (fsLit "dPR_Clo")
-- temporary
- , mk intTyConName nDP_INSTANCES FSLIT("dPR_Int")
+ , mk intTyConName nDP_INSTANCES (fsLit "dPR_Int")
+ , mk doubleTyConName nDP_INSTANCES (fsLit "dPR_Double")
]
++ map mk_sum [2..mAX_NDP_SUM]
mk_prod n = (tyConName $ prodTyCon n bi, nDP_REPR,
mkFastString ("dPR_" ++ show n))
-lookupExternalVar :: Module -> FastString -> DsM Var
-lookupExternalVar mod fs
+initBuiltinBoxedTyCons :: Builtins -> DsM [(Name, TyCon)]
+initBuiltinBoxedTyCons = return . builtinBoxedTyCons
+
+builtinBoxedTyCons :: Builtins -> [(Name, TyCon)]
+builtinBoxedTyCons _ =
+ [(tyConName intPrimTyCon, intTyCon)]
+
+externalVar :: Module -> FastString -> DsM Var
+externalVar mod fs
= dsLookupGlobalId =<< lookupOrig mod (mkVarOccFS fs)
-lookupExternalTyCon :: Module -> FastString -> DsM TyCon
-lookupExternalTyCon mod fs
+externalTyCon :: Module -> FastString -> DsM TyCon
+externalTyCon mod fs
= dsLookupTyCon =<< lookupOrig mod (mkOccNameFS tcName fs)
+unitTyConName :: Name
unitTyConName = tyConName unitTyCon
+
+primMethod :: TyCon -> String -> DsM (Maybe Var)
+primMethod tycon method
+ | Just suffix <- lookupNameEnv prim_ty_cons (tyConName tycon)
+ = liftM Just
+ $ dsLookupGlobalId =<< lookupOrig nDP_UNBOXED (mkVarOcc $ method ++ suffix)
+
+ | otherwise = return Nothing
+
+primPArray :: TyCon -> DsM (Maybe TyCon)
+primPArray tycon
+ | Just suffix <- lookupNameEnv prim_ty_cons (tyConName tycon)
+ = liftM Just
+ $ dsLookupTyCon =<< lookupOrig nDP_UNBOXED (mkOccName tcName $ "PArray" ++ suffix)
+
+ | otherwise = return Nothing
+
+prim_ty_cons :: NameEnv String
+prim_ty_cons = mkNameEnv [mk_prim intPrimTyCon]
+ where
+ mk_prim tycon = (tyConName tycon, '_' : getOccString tycon)
+