-{-# OPTIONS -w #-}
--- The above warning supression flag is a temporary kludge.
--- While working on this module you are encouraged to remove it and fix
--- any warnings in the module. See
--- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
--- for details
-
module VectUtils (
collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
collectAnnValBinders,
newLocalVVar,
- mkBuiltinCo,
- mkPADictType, mkPArrayType, mkPReprType,
+ mkBuiltinCo, voidType, mkWrapType,
+ mkPADictType, mkPArrayType, mkPDataType, mkPReprType, mkPArray,
- parrayReprTyCon, parrayReprDataCon, mkVScrut,
- prDFunOfTyCon,
+ pdataReprTyCon, pdataReprDataCon, mkVScrut,
+ prDictOfType, prDFunOfTyCon,
paDictArgType, paDictOfType, paDFunType,
- paMethod, mkPR, lengthPA, replicatePA, emptyPA, packPA, combinePA, liftPA,
- polyAbstract, polyApply, polyVApply,
+ paMethod, wrapPR, replicatePD, emptyPD, packPD, packByTagPD,
+ combinePD,
+ liftPD,
+ zipScalars, scalarClosure,
+ polyAbstract, polyApply, polyVApply, polyArity,
+ Inline(..), addInlineArity, inlineMe,
hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
buildClosure, buildClosures,
mkClosureApp
) where
-#include "HsVersions.h"
-
import VectCore
import VectMonad
-import DsUtils
+import MkCore ( mkCoreTup, mkWildCase )
import CoreSyn
import CoreUtils
+import CoreUnfold ( mkInlineRule )
import Coercion
import Type
import TypeRep
import TyCon
import DataCon
import Var
-import Id ( mkWildId )
import MkId ( unwrapFamInstScrut )
-import Name ( Name )
-import PrelNames
+import Id ( setIdUnfolding )
import TysWiredIn
-import TysPrim ( intPrimTy )
import BasicTypes ( Boxity(..) )
import Literal ( Literal, mkMachInt )
import Outputable
import FastString
-import Data.List ( zipWith4 )
-import Control.Monad ( liftM, liftM2, zipWithM_ )
+import Control.Monad
collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
collectAnnTypeArgs expr = go expr []
go bs e = (reverse bs, e)
isAnnTypeArg :: AnnExpr b ann -> Bool
-isAnnTypeArg (_, AnnType t) = True
+isAnnTypeArg (_, AnnType _) = True
isAnnTypeArg _ = False
dataConTagZ :: DataCon -> Int
where
mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
-mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
-mkBuiltinTyConApps1 get_tc dft [] = return dft
-mkBuiltinTyConApps1 get_tc dft tys
- = do
- tc <- builtin get_tc
- case tys of
- [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
- _ -> return $ foldr1 (mk tc) tys
- where
- mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
+voidType :: VM Type
+voidType = mkBuiltinTyConApp VectMonad.voidTyCon []
-mkClosureType :: Type -> Type -> VM Type
-mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
+mkWrapType :: Type -> VM Type
+mkWrapType ty = mkBuiltinTyConApp wrapTyCon [ty]
mkClosureTypes :: [Type] -> Type -> VM Type
mkClosureTypes = mkBuiltinTyConApps closureTyCon
mkPArrayType ty
| Just tycon <- splitPrimTyCon ty
= do
- arr <- traceMaybeV "mkPArrayType" (ppr tycon)
- $ lookupPrimPArray tycon
- return $ mkTyConApp arr []
+ r <- lookupPrimPArray tycon
+ case r of
+ Just arr -> return $ mkTyConApp arr []
+ Nothing -> cantVectorise "Primitive tycon not vectorised" (ppr tycon)
mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
+mkPDataType :: Type -> VM Type
+mkPDataType ty = mkBuiltinTyConApp pdataTyCon [ty]
+
+mkPArray :: Type -> CoreExpr -> CoreExpr -> VM CoreExpr
+mkPArray ty len dat = do
+ tc <- builtin parrayTyCon
+ let [dc] = tyConDataCons tc
+ return $ mkConApp dc [Type ty, len, dat]
+
mkBuiltinCo :: (Builtins -> TyCon) -> VM Coercion
mkBuiltinCo get_tc
= do
tc <- builtin get_tc
return $ mkTyConApp tc []
-parrayReprTyCon :: Type -> VM (TyCon, [Type])
-parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
+pdataReprTyCon :: Type -> VM (TyCon, [Type])
+pdataReprTyCon ty = builtin pdataTyCon >>= (`lookupFamInst` [ty])
-parrayReprDataCon :: Type -> VM (DataCon, [Type])
-parrayReprDataCon ty
+pdataReprDataCon :: Type -> VM (DataCon, [Type])
+pdataReprDataCon ty
= do
- (tc, arg_tys) <- parrayReprTyCon ty
+ (tc, arg_tys) <- pdataReprTyCon ty
let [dc] = tyConDataCons tc
return (dc, arg_tys)
-mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
+mkVScrut :: VExpr -> VM (CoreExpr, CoreExpr, TyCon, [Type])
mkVScrut (ve, le)
= do
- (tc, arg_tys) <- parrayReprTyCon (exprType ve)
- return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
+ (tc, arg_tys) <- pdataReprTyCon ty
+ return (ve, unwrapFamInstScrut tc arg_tys le, tc, arg_tys)
+ where
+ ty = exprType ve
prDFunOfTyCon :: TyCon -> VM CoreExpr
prDFunOfTyCon tycon
- = liftM Var (traceMaybeV "prDictOfTyCon" (ppr tycon) (lookupTyConPR tycon))
+ = liftM Var
+ . maybeCantVectoriseM "No PR dictionary for tycon" (ppr tycon)
+ $ lookupTyConPR tycon
paDictArgType :: TyVar -> VM (Maybe Type)
paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
go ty k | Just k' <- kindView k = go ty k'
go ty (FunTy k1 k2)
= do
- tv <- newTyVar FSLIT("a") k1
+ tv <- newTyVar (fsLit "a") k1
mty1 <- go (TyVarTy tv) k1
case mty1 of
Just ty1 -> do
| isLiftedTypeKind k
= liftM Just (mkPADictType ty)
- go ty k = return Nothing
+ go _ _ = return Nothing
paDictOfType :: Type -> VM CoreExpr
paDictOfType ty = paDictOfTyApp ty_fn ty_args
paDFunApply dfun ty_args
paDictOfTyApp (TyConApp tc _) ty_args
= do
- dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
+ dfun <- maybeCantVectoriseM "No PA dictionary for tycon" (ppr tc)
+ $ lookupTyConPA tc
paDFunApply (Var dfun) ty_args
-paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
+paDictOfTyApp ty _
+ = cantVectorise "Can't construct PA dictionary for type" (ppr ty)
paDFunType :: TyCon -> VM Type
paDFunType tc
dicts <- mapM paDictOfType tys
return $ mkApps (mkTyApps dfun tys) dicts
-type PAMethod = (Builtins -> Var, String)
-
-pa_length = (lengthPAVar, "lengthPA")
-pa_replicate = (replicatePAVar, "replicatePA")
-pa_empty = (emptyPAVar, "emptyPA")
-pa_pack = (packPAVar, "packPA")
-
-paMethod :: PAMethod -> Type -> VM CoreExpr
-paMethod (method, name) ty
+paMethod :: (Builtins -> Var) -> String -> Type -> VM CoreExpr
+paMethod _ name ty
| Just tycon <- splitPrimTyCon ty
- = do
- fn <- traceMaybeV "paMethod" (ppr tycon <+> text name)
- $ lookupPrimMethod tycon name
- return (Var fn)
+ = liftM Var
+ . maybeCantVectoriseM "No PA method" (text name <+> text "for" <+> ppr tycon)
+ $ lookupPrimMethod tycon name
-paMethod (method, name) ty
+paMethod method _ ty
= do
fn <- builtin method
dict <- paDictOfType ty
return $ mkApps (Var fn) [Type ty, dict]
-mkPR :: Type -> VM CoreExpr
-mkPR ty
+prDictOfType :: Type -> VM CoreExpr
+prDictOfType ty = prDictOfTyApp ty_fn ty_args
+ where
+ (ty_fn, ty_args) = splitAppTys ty
+
+prDictOfTyApp :: Type -> [Type] -> VM CoreExpr
+prDictOfTyApp ty_fn ty_args
+ | Just ty_fn' <- coreView ty_fn = prDictOfTyApp ty_fn' ty_args
+prDictOfTyApp (TyConApp tc _) ty_args
= do
- fn <- builtin mkPRVar
- dict <- paDictOfType ty
- return $ mkApps (Var fn) [Type ty, dict]
+ dfun <- liftM Var $ maybeV (lookupTyConPR tc)
+ prDFunApply dfun ty_args
+prDictOfTyApp _ _ = noV
+
+prDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
+prDFunApply dfun tys
+ = do
+ dicts <- mapM prDictOfType tys
+ return $ mkApps (mkTyApps dfun tys) dicts
+
+wrapPR :: Type -> VM CoreExpr
+wrapPR ty
+ = do
+ pa_dict <- paDictOfType ty
+ pr_dfun <- prDFunOfTyCon =<< builtin wrapTyCon
+ return $ mkApps pr_dfun [Type ty, pa_dict]
-lengthPA :: Type -> CoreExpr -> VM CoreExpr
-lengthPA ty x = liftM (`App` x) (paMethod pa_length ty)
+replicatePD :: CoreExpr -> CoreExpr -> VM CoreExpr
+replicatePD len x = liftM (`mkApps` [len,x])
+ (paMethod replicatePDVar "replicatePD" (exprType x))
-replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
-replicatePA len x = liftM (`mkApps` [len,x])
- (paMethod pa_replicate (exprType x))
+emptyPD :: Type -> VM CoreExpr
+emptyPD = paMethod emptyPDVar "emptyPD"
-emptyPA :: Type -> VM CoreExpr
-emptyPA = paMethod pa_empty
+packPD :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> VM CoreExpr
+packPD ty xs len sel = liftM (`mkApps` [xs, len, sel])
+ (paMethod packPDVar "packPD" ty)
-packPA :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> VM CoreExpr
-packPA ty xs len sel = liftM (`mkApps` [len, sel])
- (paMethod pa_pack ty)
+packByTagPD :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> CoreExpr
+ -> VM CoreExpr
+packByTagPD ty xs len tags t
+ = liftM (`mkApps` [xs, len, tags, t])
+ (paMethod packByTagPDVar "packByTagPD" ty)
-combinePA :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> [CoreExpr]
+combinePD :: Type -> CoreExpr -> CoreExpr -> [CoreExpr]
-> VM CoreExpr
-combinePA ty len sel is xs
- = liftM (`mkApps` (len : sel : is : xs))
- (paMethod (combinePAVar n, "combine" ++ show n ++ "PA") ty)
+combinePD ty len sel xs
+ = liftM (`mkApps` (len : sel : xs))
+ (paMethod (combinePDVar n) ("combine" ++ show n ++ "PD") ty)
where
n = length xs
-liftPA :: CoreExpr -> VM CoreExpr
-liftPA x
+liftPD :: CoreExpr -> VM CoreExpr
+liftPD x
= do
lc <- builtin liftingContext
- replicatePA (Var lc) x
+ replicatePD (Var lc) x
+
+zipScalars :: [Type] -> Type -> VM CoreExpr
+zipScalars arg_tys res_ty
+ = do
+ scalar <- builtin scalarClass
+ (dfuns, _) <- mapAndUnzipM (\ty -> lookupInst scalar [ty]) ty_args
+ zipf <- builtin (scalarZip $ length arg_tys)
+ return $ Var zipf `mkTyApps` ty_args `mkApps` map Var dfuns
+ where
+ ty_args = arg_tys ++ [res_ty]
+
+scalarClosure :: [Type] -> Type -> CoreExpr -> CoreExpr -> VM CoreExpr
+scalarClosure arg_tys res_ty scalar_fun array_fun
+ = do
+ ctr <- builtin (closureCtrFun $ length arg_tys)
+ pas <- mapM paDictOfType (init arg_tys)
+ return $ Var ctr `mkTyApps` (arg_tys ++ [res_ty])
+ `mkApps` (pas ++ [scalar_fun, array_fun])
newLocalVVar :: FastString -> Type -> VM VVar
newLocalVVar fs vty
= do
- lty <- mkPArrayType vty
+ lty <- mkPDataType vty
vv <- newLocalVar fs vty
lv <- newLocalVar fs lty
return (vv,lv)
-polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
+polyAbstract :: [TyVar] -> ([Var] -> VM a) -> VM a
polyAbstract tvs p
= localV
$ do
mdicts <- mapM mk_dict_var tvs
- zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
- p (mk_lams mdicts)
+ zipWithM_ (\tv -> maybe (defLocalTyVar tv)
+ (defLocalTyVarWithPA tv . Var)) tvs mdicts
+ p (mk_args mdicts)
where
mk_dict_var tv = do
r <- paDictArgType tv
case r of
- Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
+ Just ty -> liftM Just (newLocalVar (fsLit "dPA") ty)
Nothing -> return Nothing
- mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
+ mk_args mdicts = [dict | Just dict <- mdicts]
+
+polyArity :: [TyVar] -> VM Int
+polyArity tvs = do
+ tys <- mapM paDictArgType tvs
+ return $ length [() | Just _ <- tys]
polyApply :: CoreExpr -> [Type] -> VM CoreExpr
polyApply expr tys
dicts <- mapM paDictOfType tys
return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
+
+data Inline = Inline Int -- arity
+ | DontInline
+
+addInlineArity :: Inline -> Int -> Inline
+addInlineArity (Inline m) n = Inline (m+n)
+addInlineArity DontInline _ = DontInline
+
+inlineMe :: Inline
+inlineMe = Inline 0
+
hoistBinding :: Var -> CoreExpr -> VM ()
hoistBinding v e = updGEnv $ \env ->
env { global_bindings = (v,e) : global_bindings env }
-hoistExpr :: FastString -> CoreExpr -> VM Var
-hoistExpr fs expr
+hoistExpr :: FastString -> CoreExpr -> Inline -> VM Var
+hoistExpr fs expr inl
= do
- var <- newLocalVar fs (exprType expr)
+ var <- mk_inline `liftM` newLocalVar fs (exprType expr)
hoistBinding var expr
return var
+ where
+ mk_inline var = case inl of
+ Inline arity -> var `setIdUnfolding`
+ mkInlineRule InlSat expr arity
+ DontInline -> var
-hoistVExpr :: VExpr -> VM VVar
-hoistVExpr (ve, le)
+hoistVExpr :: VExpr -> Inline -> VM VVar
+hoistVExpr (ve, le) inl
= do
fs <- getBindName
- vv <- hoistExpr ('v' `consFS` fs) ve
- lv <- hoistExpr ('l' `consFS` fs) le
+ vv <- hoistExpr ('v' `consFS` fs) ve inl
+ lv <- hoistExpr ('l' `consFS` fs) le (addInlineArity inl 1)
return (vv, lv)
-hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
-hoistPolyVExpr tvs p
+hoistPolyVExpr :: [TyVar] -> Inline -> VM VExpr -> VM VExpr
+hoistPolyVExpr tvs inline p
= do
- expr <- closedV . polyAbstract tvs $ \abstract ->
- liftM (mapVect abstract) p
- fn <- hoistVExpr expr
+ inline' <- liftM (addInlineArity inline) (polyArity tvs)
+ expr <- closedV . polyAbstract tvs $ \args ->
+ liftM (mapVect (mkLams $ tvs ++ args)) p
+ fn <- hoistVExpr expr inline'
polyVApply (vVar fn) (mkTyVarTys tvs)
takeHoisted :: VM [(Var, CoreExpr)]
setGEnv $ env { global_bindings = [] }
return $ global_bindings env
+{-
boxExpr :: Type -> VExpr -> VM VExpr
boxExpr ty (vexpr, lexpr)
| Just (tycon, []) <- splitTyConApp_maybe ty
in
return (mkConApp dc [vexpr], lexpr)
Nothing -> return (vexpr, lexpr)
-
+-}
mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
= do
dict <- paDictOfType env_ty
- mkv <- builtin mkClosureVar
- mkl <- builtin mkClosurePVar
+ mkv <- builtin closureVar
+ mkl <- builtin liftedClosureVar
return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
mkClosureApp :: Type -> Type -> VExpr -> VExpr -> VM VExpr
mkClosureApp arg_ty res_ty (vclo, lclo) (varg, larg)
= do
- vapply <- builtin applyClosureVar
- lapply <- builtin applyClosurePVar
+ vapply <- builtin applyVar
+ lapply <- builtin liftedApplyVar
+ lc <- builtin liftingContext
return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
- Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
+ Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [Var lc, lclo, larg])
buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
-buildClosures tvs vars [] res_ty mk_body
+buildClosures _ _ [] _ mk_body
= mk_body
buildClosures tvs vars [arg_ty] res_ty mk_body
- = buildClosure tvs vars arg_ty res_ty mk_body
+ = -- liftM vInlineMe $
+ buildClosure tvs vars arg_ty res_ty mk_body
buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
= do
res_ty' <- mkClosureTypes arg_tys res_ty
- arg <- newLocalVVar FSLIT("x") arg_ty
+ arg <- newLocalVVar (fsLit "x") arg_ty
+ -- liftM vInlineMe
buildClosure tvs vars arg_ty res_ty'
- . hoistPolyVExpr tvs
+ . hoistPolyVExpr tvs (Inline (length vars + 1))
$ do
lc <- builtin liftingContext
clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
buildClosure tvs vars arg_ty res_ty mk_body
= do
(env_ty, env, bind) <- buildEnv vars
- env_bndr <- newLocalVVar FSLIT("env") env_ty
- arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
+ env_bndr <- newLocalVVar (fsLit "env") env_ty
+ arg_bndr <- newLocalVVar (fsLit "arg") arg_ty
- fn <- hoistPolyVExpr tvs
+ fn <- hoistPolyVExpr tvs (Inline 2)
$ do
lc <- builtin liftingContext
body <- mk_body
- body' <- bind (vVar env_bndr)
+ return -- . vInlineMe
+ . vLams lc [env_bndr, arg_bndr]
+ $ bind (vVar env_bndr)
(vVarApps lc body (vars ++ [arg_bndr]))
- return (vLamsWithoutLC [env_bndr, arg_bndr] body')
mkClosure arg_ty res_ty env_ty fn env
-buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
-buildEnv vvs
- = do
- lc <- builtin liftingContext
- let (ty, venv, vbind) = mkVectEnv tys vs
- (lenv, lbind) <- mkLiftEnv lc tys ls
- return (ty, (venv, lenv),
- \(venv,lenv) (vbody,lbody) ->
- do
- let vbody' = vbind venv vbody
- lbody' <- lbind lenv lbody
- return (vbody', lbody'))
- where
- (vs,ls) = unzip vvs
- tys = map idType vs
-
-mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
-mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
-mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
-mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
- \env body -> Case env (mkWildId ty) (exprType body)
- [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
- where
- ty = mkCoreTupTy tys
-
-mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
-mkLiftEnv lc [ty] [v]
- = return (Var v, \env body ->
- do
- len <- lengthPA ty (Var v)
- return . Let (NonRec v env)
- $ Case len lc (exprType body) [(DEFAULT, [], body)])
-
--- NOTE: this transparently deals with empty environments
-mkLiftEnv lc tys vs
+buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VExpr)
+buildEnv [] = do
+ ty <- voidType
+ void <- builtin voidVar
+ pvoid <- builtin pvoidVar
+ return (ty, vVar (void, pvoid), \_ body -> body)
+
+buildEnv [v] = return (vVarType v, vVar v,
+ \env body -> vLet (vNonRec v env) body)
+
+buildEnv vs
= do
- (env_tc, env_tyargs) <- parrayReprTyCon vty
- let [env_con] = tyConDataCons env_tc
-
- env = Var (dataConWrapId env_con)
- `mkTyApps` env_tyargs
- `mkApps` (Var lc : args)
-
- bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
- in
- return $ Case scrut (mkWildId (exprType scrut))
- (exprType body)
- [(DataAlt env_con, lc : bndrs, body)]
- return (env, bind)
- where
- vty = mkCoreTupTy tys
+
+ (lenv_tc, lenv_tyargs) <- pdataReprTyCon ty
- args | null vs = [Var unitDataConId]
- | otherwise = map Var vs
+ let venv_con = tupleCon Boxed (length vs)
+ [lenv_con] = tyConDataCons lenv_tc
- bndrs | null vs = [mkWildId unitTy]
- | otherwise = vs
+ venv = mkCoreTup (map Var vvs)
+ lenv = Var (dataConWrapId lenv_con)
+ `mkTyApps` lenv_tyargs
+ `mkApps` map Var lvs
+
+ vbind env body = mkWildCase env ty (exprType body)
+ [(DataAlt venv_con, vvs, body)]
+
+ lbind env body =
+ let scrut = unwrapFamInstScrut lenv_tc lenv_tyargs env
+ in
+ mkWildCase scrut (exprType scrut) (exprType body)
+ [(DataAlt lenv_con, lvs, body)]
+
+ bind (venv, lenv) (vbody, lbody) = (vbind venv vbody,
+ lbind lenv lbody)
+
+ return (ty, (venv, lenv), bind)
+ where
+ (vvs, lvs) = unzip vs
+ tys = map vVarType vs
+ ty = mkBoxedTupleTy tys
projects / ghc-hetmet.git / blobdiff