-module VectType ( vectTyCon, vectType, vectTypeEnv )
+module VectType ( vectTyCon, vectType, vectTypeEnv,
+ PAInstance, painstInstance, buildPADict )
where
#include "HsVersions.h"
import TypeRep
import Coercion
import FamInstEnv ( FamInst, mkLocalFamInst )
-import InstEnv ( Instance )
+import InstEnv ( Instance, mkLocalInstance, instanceDFunId )
import OccName
import MkId
-import BasicTypes ( StrictnessMark(..), boolToRecFlag )
+import BasicTypes ( StrictnessMark(..), OverlapFlag(..), boolToRecFlag )
import Var ( Var )
import Id ( mkWildId )
-import Name ( Name )
+import Name ( Name, getOccName )
import NameEnv
import TysWiredIn ( intTy, intDataCon )
import TysPrim ( intPrimTy )
type TyConGroup = ([TyCon], UniqSet TyCon)
-vectTypeEnv :: TypeEnv -> VM (TypeEnv, [FamInst], [Instance])
+data PAInstance = PAInstance {
+ painstInstance :: Instance
+ , painstVectTyCon :: TyCon
+ , painstArrTyCon :: TyCon
+ }
+
+vectTypeEnv :: TypeEnv -> VM (TypeEnv, [FamInst], [PAInstance])
vectTypeEnv env
= do
cs <- readGEnv $ mk_map . global_tycons
keep_dcs = concatMap tyConDataCons keep_tcs
zipWithM_ defTyCon keep_tcs keep_tcs
zipWithM_ defDataCon keep_dcs keep_dcs
- vect_tcs <- vectTyConDecls conv_tcs
- parr_tcs1 <- zipWithM buildPArrayTyCon keep_tcs keep_tcs
- parr_tcs2 <- zipWithM buildPArrayTyCon conv_tcs vect_tcs
- let new_tcs = vect_tcs ++ parr_tcs1 ++ parr_tcs2
+ new_tcs <- vectTyConDecls conv_tcs
+
+ let orig_tcs = keep_tcs ++ conv_tcs
+ vect_tcs = keep_tcs ++ new_tcs
+
+ parr_tcs <- zipWithM buildPArrayTyCon orig_tcs vect_tcs
+ pa_insts <- zipWithM buildPAInstance vect_tcs parr_tcs
+
+ let all_new_tcs = new_tcs ++ parr_tcs
let new_env = extendTypeEnvList env
- (map ATyCon new_tcs
- ++ [ADataCon dc | tc <- new_tcs
+ (map ATyCon all_new_tcs
+ ++ [ADataCon dc | tc <- all_new_tcs
, dc <- tyConDataCons tc])
- return (new_env, map mkLocalFamInst (parr_tcs1 ++ parr_tcs2), [])
+ return (new_env, map mkLocalFamInst parr_tcs, pa_insts)
where
tycons = typeEnvTyCons env
groups = tyConGroups tycons
types = [ty | dc <- tyConDataCons vect_tc
, ty <- dataConRepArgTys dc]
-buildPADict :: Var -> TyCon -> TyCon -> VM [(Var, CoreExpr)]
-buildPADict var vect_tc arr_tc
+buildPAInstance :: TyCon -> TyCon -> VM PAInstance
+buildPAInstance vect_tc arr_tc
+ = do
+ pa <- builtin paClass
+ let inst_ty = mkForAllTys tvs
+ . (mkFunTys $ mkPredTys [ClassP pa [ty] | ty <- arg_tys])
+ $ mkPredTy (ClassP pa [mkTyConApp vect_tc arg_tys])
+
+ dfun <- newExportedVar (mkPADFunOcc $ getOccName vect_tc) inst_ty
+
+ return $ PAInstance {
+ painstInstance = mkLocalInstance dfun NoOverlap
+ , painstVectTyCon = vect_tc
+ , painstArrTyCon = arr_tc
+ }
+ where
+ tvs = tyConTyVars arr_tc
+ arg_tys = mkTyVarTys tvs
+
+buildPADict :: PAInstance -> VM [(Var, CoreExpr)]
+buildPADict (PAInstance {
+ painstInstance = inst
+ , painstVectTyCon = vect_tc
+ , painstArrTyCon = arr_tc })
= localV . abstractOverTyVars (tyConTyVars arr_tc) $ \abstract ->
do
- meth_binds <- mapM (mk_method abstract) paMethods
- let meth_vars = map (Var . fst) meth_binds
- meth_exprs <- mapM (`applyToTypes` arg_tys) meth_vars
+ meth_binds <- mapM mk_method paMethods
+ let meth_exprs = map (Var . fst) meth_binds
pa_dc <- builtin paDictDataCon
let dict = mkConApp pa_dc (Type (mkTyConApp vect_tc arg_tys) : meth_exprs)
- return $ (var, dict) : meth_binds
+ body = Let (Rec meth_binds) dict
+ return [(instanceDFunId inst, abstract body)]
where
tvs = tyConTyVars arr_tc
arg_tys = mkTyVarTys tvs
- mk_method abstract (name, build)
+ mk_method (name, build)
= localV
$ do
- body <- liftM abstract $ build vect_tc arr_tc
- var <- newLocalVar name (exprType body)
+ body <- build vect_tc arr_tc
+ var <- newLocalVar name (exprType body)
return (var, mkInlineMe body)
paMethods = [(FSLIT("lengthPA"), buildLengthPA),
(FSLIT("replicatePA"), buildReplicatePA)]
buildLengthPA :: TyCon -> TyCon -> VM CoreExpr
-buildLengthPA _ arr_tc
+buildLengthPA vect_tc arr_tc
= do
- arg <- newLocalVar FSLIT("xs") arg_ty
+ parr_ty <- mkPArrayType (mkTyConApp vect_tc arg_tys)
+ arg <- newLocalVar FSLIT("xs") parr_ty
+ let scrut = unwrapFamInstScrut arr_tc arg_tys (Var arg)
+ scrut_ty = exprType scrut
shape <- newLocalVar FSLIT("sel") shape_ty
body <- lengthPA (Var shape)
+ wilds <- mapM newDummyVar repr_tys
return . Lam arg
- $ Case (Var arg) (mkWildId arg_ty) intPrimTy
- [(DataAlt repr_dc, shape : map mkWildId repr_tys, body)]
+ $ Case scrut (mkWildId scrut_ty) intPrimTy
+ [(DataAlt repr_dc, shape : wilds, body)]
where
- arg_ty = mkTyConApp arr_tc . mkTyVarTys $ tyConTyVars arr_tc
+ arg_tys = mkTyVarTys $ tyConTyVars arr_tc
[repr_dc] = tyConDataCons arr_tc
shape_ty : repr_tys = dataConRepArgTys repr_dc
-
-- data T = C0 t1 ... tm
-- ...
-- Ck u1 ... un
arr_ty <- mkPArrayType ty
return $ Case val wild arr_ty
- [(DataAlt dc, pre ++ (var : post), rep), (DEFAULT, [], empty)]
+ [(DEFAULT, [], empty), (DataAlt dc, pre ++ (var : post), rep)]
-- | Split the given tycons into two sets depending on whether they have to be
-- converted (first list) or not (second list). The first argument contains