-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
pa_dc <- builtin paDictDataCon
let dict = mkConApp pa_dc (Type (mkTyConApp vect_tc arg_tys) : meth_exprs)
- return $ (var, dict) : meth_binds
+ return $ (instanceDFunId inst, abstract dict) : meth_binds
where
tvs = tyConTyVars arr_tc
arg_tys = mkTyVarTys tvs