module Vectorise.Type.PADict
- ( buildToPRepr
- , buildFromPRepr
- , buildToArrPRepr
- , buildFromArrPRepr)
+ (buildPADict)
where
-import VectUtils
import Vectorise.Monad
import Vectorise.Builtins
import Vectorise.Type.Repr
+import Vectorise.Type.PRepr
+import Vectorise.Type.PRDict
+import Vectorise.Utils
+
+import BasicTypes
import CoreSyn
import CoreUtils
-import MkCore ( mkWildCase )
+import CoreUnfold
import TyCon
import Type
-import Coercion
-import MkId
-
-import FastString
-import MonadUtils
-import Control.Monad
-
-
-buildToPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr
-buildToPRepr vect_tc repr_tc _ repr
- = do
- let arg_ty = mkTyConApp vect_tc ty_args
- res_ty <- mkPReprType arg_ty
- arg <- newLocalVar (fsLit "x") arg_ty
- result <- to_sum (Var arg) arg_ty res_ty repr
- return $ Lam arg result
- where
- ty_args = mkTyVarTys (tyConTyVars vect_tc)
-
- wrap_repr_inst = wrapFamInstBody repr_tc ty_args
-
- to_sum _ _ _ EmptySum
- = do
- void <- builtin voidVar
- return $ wrap_repr_inst $ Var void
-
- to_sum arg arg_ty res_ty (UnarySum r)
- = do
- (pat, vars, body) <- con_alt r
- return $ mkWildCase arg arg_ty res_ty
- [(pat, vars, wrap_repr_inst body)]
-
- to_sum arg arg_ty res_ty (Sum { repr_sum_tc = sum_tc
- , repr_con_tys = tys
- , repr_cons = cons })
- = do
- alts <- mapM con_alt cons
- let alts' = [(pat, vars, wrap_repr_inst
- $ mkConApp sum_con (map Type tys ++ [body]))
- | ((pat, vars, body), sum_con)
- <- zip alts (tyConDataCons sum_tc)]
- return $ mkWildCase arg arg_ty res_ty alts'
-
- con_alt (ConRepr con r)
- = do
- (vars, body) <- to_prod r
- return (DataAlt con, vars, body)
-
- to_prod EmptyProd
- = do
- void <- builtin voidVar
- return ([], Var void)
-
- to_prod (UnaryProd comp)
- = do
- var <- newLocalVar (fsLit "x") (compOrigType comp)
- body <- to_comp (Var var) comp
- return ([var], body)
-
- to_prod(Prod { repr_tup_tc = tup_tc
- , repr_comp_tys = tys
- , repr_comps = comps })
- = do
- vars <- newLocalVars (fsLit "x") (map compOrigType comps)
- exprs <- zipWithM to_comp (map Var vars) comps
- return (vars, mkConApp tup_con (map Type tys ++ exprs))
- where
- [tup_con] = tyConDataCons tup_tc
-
- to_comp expr (Keep _ _) = return expr
- to_comp expr (Wrap ty) = do
- wrap_tc <- builtin wrapTyCon
- return $ wrapNewTypeBody wrap_tc [ty] expr
-
-
-buildFromPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr
-buildFromPRepr vect_tc repr_tc _ repr
- = do
- arg_ty <- mkPReprType res_ty
- arg <- newLocalVar (fsLit "x") arg_ty
-
- result <- from_sum (unwrapFamInstScrut repr_tc ty_args (Var arg))
- repr
- return $ Lam arg result
- where
- ty_args = mkTyVarTys (tyConTyVars vect_tc)
- res_ty = mkTyConApp vect_tc ty_args
-
- from_sum _ EmptySum
- = do
- dummy <- builtin fromVoidVar
- return $ Var dummy `App` Type res_ty
-
- from_sum expr (UnarySum r) = from_con expr r
- from_sum expr (Sum { repr_sum_tc = sum_tc
- , repr_con_tys = tys
- , repr_cons = cons })
- = do
- vars <- newLocalVars (fsLit "x") tys
- es <- zipWithM from_con (map Var vars) cons
- return $ mkWildCase expr (exprType expr) res_ty
- [(DataAlt con, [var], e)
- | (con, var, e) <- zip3 (tyConDataCons sum_tc) vars es]
-
- from_con expr (ConRepr con r)
- = from_prod expr (mkConApp con $ map Type ty_args) r
-
- from_prod _ con EmptyProd = return con
- from_prod expr con (UnaryProd r)
- = do
- e <- from_comp expr r
- return $ con `App` e
-
- from_prod expr con (Prod { repr_tup_tc = tup_tc
- , repr_comp_tys = tys
- , repr_comps = comps
- })
- = do
- vars <- newLocalVars (fsLit "y") tys
- es <- zipWithM from_comp (map Var vars) comps
- return $ mkWildCase expr (exprType expr) res_ty
- [(DataAlt tup_con, vars, con `mkApps` es)]
- where
- [tup_con] = tyConDataCons tup_tc
-
- from_comp expr (Keep _ _) = return expr
- from_comp expr (Wrap ty)
- = do
- wrap <- builtin wrapTyCon
- return $ unwrapNewTypeBody wrap [ty] expr
-
-
-buildToArrPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr
-buildToArrPRepr vect_tc prepr_tc pdata_tc r
- = do
- arg_ty <- mkPDataType el_ty
- res_ty <- mkPDataType =<< mkPReprType el_ty
- arg <- newLocalVar (fsLit "xs") arg_ty
-
- pdata_co <- mkBuiltinCo pdataTyCon
- let Just repr_co = tyConFamilyCoercion_maybe prepr_tc
- co = mkAppCoercion pdata_co
- . mkSymCoercion
- $ mkTyConApp repr_co ty_args
-
- scrut = unwrapFamInstScrut pdata_tc ty_args (Var arg)
-
- (vars, result) <- to_sum r
-
- return . Lam arg
- $ mkWildCase scrut (mkTyConApp pdata_tc ty_args) res_ty
- [(DataAlt pdata_dc, vars, mkCoerce co result)]
- where
- ty_args = mkTyVarTys $ tyConTyVars vect_tc
- el_ty = mkTyConApp vect_tc ty_args
-
- [pdata_dc] = tyConDataCons pdata_tc
-
-
- to_sum EmptySum = do
- pvoid <- builtin pvoidVar
- return ([], Var pvoid)
- to_sum (UnarySum r) = to_con r
- to_sum (Sum { repr_psum_tc = psum_tc
- , repr_sel_ty = sel_ty
- , repr_con_tys = tys
- , repr_cons = cons
- })
- = do
- (vars, exprs) <- mapAndUnzipM to_con cons
- sel <- newLocalVar (fsLit "sel") sel_ty
- return (sel : concat vars, mk_result (Var sel) exprs)
- where
- [psum_con] = tyConDataCons psum_tc
- mk_result sel exprs = wrapFamInstBody psum_tc tys
- $ mkConApp psum_con
- $ map Type tys ++ (sel : exprs)
-
- to_con (ConRepr _ r) = to_prod r
-
- to_prod EmptyProd = do
- pvoid <- builtin pvoidVar
- return ([], Var pvoid)
- to_prod (UnaryProd r)
- = do
- pty <- mkPDataType (compOrigType r)
- var <- newLocalVar (fsLit "x") pty
- expr <- to_comp (Var var) r
- return ([var], expr)
-
- to_prod (Prod { repr_ptup_tc = ptup_tc
- , repr_comp_tys = tys
- , repr_comps = comps })
- = do
- ptys <- mapM (mkPDataType . compOrigType) comps
- vars <- newLocalVars (fsLit "x") ptys
- es <- zipWithM to_comp (map Var vars) comps
- return (vars, mk_result es)
- where
- [ptup_con] = tyConDataCons ptup_tc
- mk_result exprs = wrapFamInstBody ptup_tc tys
- $ mkConApp ptup_con
- $ map Type tys ++ exprs
-
- to_comp expr (Keep _ _) = return expr
-
- -- FIXME: this is bound to be wrong!
- to_comp expr (Wrap ty)
- = do
- wrap_tc <- builtin wrapTyCon
- (pwrap_tc, _) <- pdataReprTyCon (mkTyConApp wrap_tc [ty])
- return $ wrapNewTypeBody pwrap_tc [ty] expr
-
-
-buildFromArrPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr
-buildFromArrPRepr vect_tc prepr_tc pdata_tc r
- = do
- arg_ty <- mkPDataType =<< mkPReprType el_ty
- res_ty <- mkPDataType el_ty
- arg <- newLocalVar (fsLit "xs") arg_ty
-
- pdata_co <- mkBuiltinCo pdataTyCon
- let Just repr_co = tyConFamilyCoercion_maybe prepr_tc
- co = mkAppCoercion pdata_co
- $ mkTyConApp repr_co var_tys
-
- scrut = mkCoerce co (Var arg)
-
- mk_result args = wrapFamInstBody pdata_tc var_tys
- $ mkConApp pdata_con
- $ map Type var_tys ++ args
-
- (expr, _) <- fixV $ \ ~(_, args) ->
- from_sum res_ty (mk_result args) scrut r
-
- return $ Lam arg expr
-
- -- (args, mk) <- from_sum res_ty scrut r
-
- -- let result = wrapFamInstBody pdata_tc var_tys
- -- . mkConApp pdata_dc
- -- $ map Type var_tys ++ args
-
- -- return $ Lam arg (mk result)
+import TypeRep
+import Id
+import Var
+import Name
+import Class
+import Outputable
+
+-- debug = False
+-- dtrace s x = if debug then pprTrace "Vectoris.Type.PADict" s x else x
+
+-- | Build the PA dictionary for some type and hoist it to top level.
+-- The PA dictionary holds fns that convert values to and from their vectorised representations.
+buildPADict
+ :: TyCon -- ^ tycon of the type being vectorised.
+ -> TyCon -- ^ tycon of the type used for the vectorised representation.
+ -> TyCon --
+ -> SumRepr -- ^ representation used for the type being vectorised.
+ -> VM Var -- ^ name of the top-level dictionary function.
+
+buildPADict vect_tc prepr_tc arr_tc repr
+ = polyAbstract tvs $ \args ->
+ case args of
+ (_:_) -> pprPanic "Vectorise.Type.PADict.buildPADict" (text "why do we need superclass dicts?")
+ [] -> do
+ -- TODO: I'm forcing args to [] because I'm not sure why we need them.
+ -- class PA has superclass (PR (PRepr a)) but we're not using
+ -- the superclass dictionary to build the PA dictionary.
+
+ -- Get ids for each of the methods in the dictionary.
+ method_ids <- mapM (method args) paMethods
+
+ -- Expression to build the dictionary.
+ pa_dc <- builtin paDataCon
+ let dict = mkLams (tvs ++ args)
+ $ mkConApp pa_dc
+ $ Type inst_ty : map (method_call args) method_ids
+
+ -- Build the type of the dictionary function.
+ pa_tc <- builtin paTyCon
+ let Just pa_cls = tyConClass_maybe pa_tc
+
+ let dfun_ty = mkForAllTys tvs
+ $ mkFunTys (map varType args) (PredTy $ ClassP pa_cls [inst_ty])
+
+ -- Set the unfolding for the inliner.
+ raw_dfun <- newExportedVar dfun_name dfun_ty
+ let dfun = raw_dfun `setIdUnfolding` mkDFunUnfolding dfun_ty (map Var method_ids)
+ `setInlinePragma` dfunInlinePragma
+
+ -- Add the new binding to the top-level environment.
+ hoistBinding dfun dict
+ return dfun
where
- var_tys = mkTyVarTys $ tyConTyVars vect_tc
- el_ty = mkTyConApp vect_tc var_tys
-
- [pdata_con] = tyConDataCons pdata_tc
-
- from_sum _ res _ EmptySum = return (res, [])
- from_sum res_ty res expr (UnarySum r) = from_con res_ty res expr r
- from_sum res_ty res expr (Sum { repr_psum_tc = psum_tc
- , repr_sel_ty = sel_ty
- , repr_con_tys = tys
- , repr_cons = cons })
- = do
- sel <- newLocalVar (fsLit "sel") sel_ty
- ptys <- mapM mkPDataType tys
- vars <- newLocalVars (fsLit "xs") ptys
- (res', args) <- fold from_con res_ty res (map Var vars) cons
- let scrut = unwrapFamInstScrut psum_tc tys expr
- body = mkWildCase scrut (exprType scrut) res_ty
- [(DataAlt psum_con, sel : vars, res')]
- return (body, Var sel : args)
- where
- [psum_con] = tyConDataCons psum_tc
-
-
- from_con res_ty res expr (ConRepr _ r) = from_prod res_ty res expr r
-
- from_prod _ res _ EmptyProd = return (res, [])
- from_prod res_ty res expr (UnaryProd r)
- = from_comp res_ty res expr r
- from_prod res_ty res expr (Prod { repr_ptup_tc = ptup_tc
- , repr_comp_tys = tys
- , repr_comps = comps })
- = do
- ptys <- mapM mkPDataType tys
- vars <- newLocalVars (fsLit "ys") ptys
- (res', args) <- fold from_comp res_ty res (map Var vars) comps
- let scrut = unwrapFamInstScrut ptup_tc tys expr
- body = mkWildCase scrut (exprType scrut) res_ty
- [(DataAlt ptup_con, vars, res')]
- return (body, args)
- where
- [ptup_con] = tyConDataCons ptup_tc
-
- from_comp _ res expr (Keep _ _) = return (res, [expr])
- from_comp _ res expr (Wrap ty)
- = do
- wrap_tc <- builtin wrapTyCon
- (pwrap_tc, _) <- pdataReprTyCon (mkTyConApp wrap_tc [ty])
- return (res, [unwrapNewTypeBody pwrap_tc [ty]
- $ unwrapFamInstScrut pwrap_tc [ty] expr])
+ tvs = tyConTyVars vect_tc
+ arg_tys = mkTyVarTys tvs
+ inst_ty = mkTyConApp vect_tc arg_tys
+
+ dfun_name = mkPADFunOcc (getOccName vect_tc)
+
+ method args (name, build)
+ = localV
+ $ do
+ expr <- build vect_tc prepr_tc arr_tc repr
+ let body = mkLams (tvs ++ args) expr
+ raw_var <- newExportedVar (method_name name) (exprType body)
+ let var = raw_var
+ `setIdUnfolding` mkInlineUnfolding (Just (length args)) body
+ `setInlinePragma` alwaysInlinePragma
+ hoistBinding var body
+ return var
+
+ method_call args id = mkApps (Var id) (map Type arg_tys ++ map Var args)
+ method_name name = mkVarOcc $ occNameString dfun_name ++ ('$' : name)
+
+
+paMethods :: [(String, TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr)]
+paMethods = [("dictPRepr", buildPRDict),
+ ("toPRepr", buildToPRepr),
+ ("fromPRepr", buildFromPRepr),
+ ("toArrPRepr", buildToArrPRepr),
+ ("fromArrPRepr", buildFromArrPRepr)]
- fold f res_ty res exprs rs = foldrM f' (res, []) (zip exprs rs)
- where
- f' (expr, r) (res, args) = do
- (res', args') <- f res_ty res expr r
- return (res', args' ++ args)
projects / ghc-hetmet.git / blobdiff