X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fvectorise%2FVectBuiltIn.hs;h=dc5694440f46fb0a76404764c784f633a382d51d;hb=08652e67c4d5d9a40687f93c286021a867c1bca0;hp=0b8c04747e4776f0de2da575c6e5c589df1821d9;hpb=255f46e120cc18f51703c79d009d76016140abcb;p=ghc-hetmet.git diff --git a/compiler/vectorise/VectBuiltIn.hs b/compiler/vectorise/VectBuiltIn.hs index 0b8c047..dc56944 100644 --- a/compiler/vectorise/VectBuiltIn.hs +++ b/compiler/vectorise/VectBuiltIn.hs @@ -1,25 +1,35 @@ 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 @@ -27,13 +37,47 @@ import Outputable 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 @@ -41,22 +85,36 @@ data Builtins = Builtins { , 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 @@ -64,39 +122,56 @@ sumTyCon n bi 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 { @@ -106,69 +181,185 @@ initBuiltins , 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] @@ -182,13 +373,43 @@ builtinPRs bi = 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) +