import IfaceEnv
import BuildTyCl
import TcRnMonad
-import TcType ( tcSplitSigmaTy )
+import TcType
import Type
import TypeRep
import HscTypes
import TyCon
import DataCon
import TysWiredIn
+import TysPrim ( anyTyConOfKind )
import Var ( TyVar )
+import BasicTypes ( nonRuleLoopBreaker )
import qualified Var
import VarEnv
import Name
import NameEnv
-import OccName
+import OccurAnal ( occurAnalyseExpr )
+import Demand ( isBottomingSig )
import Module
-import LazyUniqFM
+import UniqFM
import UniqSupply
import Outputable
import ErrUtils
import DynFlags
import Util
import FastString
-import BasicTypes (Arity)
import Control.Monad
import Data.List
-import Data.Maybe
\end{code}
This module takes
tcIfaceDecl :: Bool -- True <=> discard IdInfo on IfaceId bindings
-> IfaceDecl
-> IfL TyThing
-
-tcIfaceDecl ignore_prags (IfaceId {ifName = occ_name, ifType = iface_type,
- ifIdDetails = details, ifIdInfo = info})
+tcIfaceDecl = tc_iface_decl NoParentTyCon
+
+tc_iface_decl :: TyConParent -- For nested declarations
+ -> Bool -- True <=> discard IdInfo on IfaceId bindings
+ -> IfaceDecl
+ -> IfL TyThing
+tc_iface_decl _ ignore_prags (IfaceId {ifName = occ_name, ifType = iface_type,
+ ifIdDetails = details, ifIdInfo = info})
= do { name <- lookupIfaceTop occ_name
; ty <- tcIfaceType iface_type
; details <- tcIdDetails ty details
; info <- tcIdInfo ignore_prags name ty info
; return (AnId (mkGlobalId details name ty info)) }
-tcIfaceDecl _ (IfaceData {ifName = occ_name,
+tc_iface_decl parent _ (IfaceData {ifName = occ_name,
ifTyVars = tv_bndrs,
ifCtxt = ctxt, ifGadtSyntax = gadt_syn,
ifCons = rdr_cons,
{ tc_name <- lookupIfaceTop occ_name
; tycon <- fixM ( \ tycon -> do
{ stupid_theta <- tcIfaceCtxt ctxt
- ; mb_fam_inst <- tcFamInst mb_family
; cons <- tcIfaceDataCons tc_name tycon tyvars rdr_cons
- ; buildAlgTyCon tc_name tyvars stupid_theta
- cons is_rec want_generic gadt_syn mb_fam_inst
+ ; mb_fam_inst <- tcFamInst mb_family
+ ; buildAlgTyCon tc_name tyvars stupid_theta cons is_rec
+ want_generic gadt_syn parent mb_fam_inst
})
; traceIf (text "tcIfaceDecl4" <+> ppr tycon)
; return (ATyCon tycon) }
-tcIfaceDecl _ (IfaceSyn {ifName = occ_name, ifTyVars = tv_bndrs,
- ifSynRhs = mb_rhs_ty,
- ifSynKind = kind, ifFamInst = mb_family})
+tc_iface_decl parent _ (IfaceSyn {ifName = occ_name, ifTyVars = tv_bndrs,
+ ifSynRhs = mb_rhs_ty,
+ ifSynKind = kind, ifFamInst = mb_family})
= bindIfaceTyVars_AT tv_bndrs $ \ tyvars -> do
- { tc_name <- lookupIfaceTop occ_name
+ { tc_name <- lookupIfaceTop occ_name
; rhs_kind <- tcIfaceType kind -- Note [Synonym kind loop]
- ; ~(rhs, fam) <- forkM (mk_doc tc_name) $
- do { rhs <- tc_syn_rhs rhs_kind mb_rhs_ty
- ; fam <- tcFamInst mb_family
- ; return (rhs, fam) }
- ; tycon <- buildSynTyCon tc_name tyvars rhs rhs_kind fam
- ; return $ ATyCon tycon
+ ; rhs <- forkM (mk_doc tc_name) $
+ tc_syn_rhs mb_rhs_ty
+ ; fam_info <- tcFamInst mb_family
+ ; tycon <- buildSynTyCon tc_name tyvars rhs rhs_kind parent fam_info
+ ; return (ATyCon tycon)
}
where
mk_doc n = ptext (sLit "Type syonym") <+> ppr n
- tc_syn_rhs kind Nothing = return (OpenSynTyCon kind Nothing)
- tc_syn_rhs _ (Just ty) = do { rhs_ty <- tcIfaceType ty
- ; return (SynonymTyCon rhs_ty) }
+ tc_syn_rhs Nothing = return SynFamilyTyCon
+ tc_syn_rhs (Just ty) = do { rhs_ty <- tcIfaceType ty
+ ; return (SynonymTyCon rhs_ty) }
-tcIfaceDecl ignore_prags
+tc_iface_decl _parent ignore_prags
(IfaceClass {ifCtxt = rdr_ctxt, ifName = occ_name,
ifTyVars = tv_bndrs, ifFDs = rdr_fds,
ifATs = rdr_ats, ifSigs = rdr_sigs,
; ctxt <- tcIfaceCtxt rdr_ctxt
; sigs <- mapM tc_sig rdr_sigs
; fds <- mapM tc_fd rdr_fds
- ; ats' <- mapM (tcIfaceDecl ignore_prags) rdr_ats
- ; let ats = map (setAssocFamilyPermutation tyvars) ats'
- ; cls <- buildClass ignore_prags cls_name tyvars ctxt fds ats sigs tc_isrec
+ ; cls <- fixM $ \ cls -> do
+ { ats <- mapM (tc_iface_decl (AssocFamilyTyCon cls) ignore_prags) rdr_ats
+ ; buildClass ignore_prags cls_name tyvars ctxt fds ats sigs tc_isrec }
; return (AClass cls) }
where
tc_sig (IfaceClassOp occ dm rdr_ty)
; tvs2' <- mapM tcIfaceTyVar tvs2
; return (tvs1', tvs2') }
-tcIfaceDecl _ (IfaceForeign {ifName = rdr_name, ifExtName = ext_name})
+tc_iface_decl _ _ (IfaceForeign {ifName = rdr_name, ifExtName = ext_name})
= do { name <- lookupIfaceTop rdr_name
; return (ATyCon (mkForeignTyCon name ext_name
liftedTypeKind 0)) }
tcIfaceDataCons tycon_name tycon _ if_cons
= case if_cons of
IfAbstractTyCon -> return mkAbstractTyConRhs
- IfOpenDataTyCon -> return mkOpenDataTyConRhs
+ IfOpenDataTyCon -> return DataFamilyTyCon
IfDataTyCon cons -> do { data_cons <- mapM tc_con_decl cons
; return (mkDataTyConRhs data_cons) }
IfNewTyCon con -> do { data_con <- tc_con_decl con
; let mb_tcs = map ifTopFreeName args
; return (Rule { ru_name = name, ru_fn = fn, ru_act = act,
ru_bndrs = bndrs', ru_args = args',
- ru_rhs = rhs',
+ ru_rhs = occurAnalyseExpr rhs',
ru_rough = mb_tcs,
ru_local = False }) } -- An imported RULE is never for a local Id
-- or, even if it is (module loop, perhaps)
tcIfaceExpr (IfaceNote note expr) = do
expr' <- tcIfaceExpr expr
case note of
- IfaceInlineMe -> return (Note InlineMe expr')
IfaceSCC cc -> return (Note (SCC cc) expr')
IfaceCoreNote n -> return (Note (CoreNote n) expr')
; tcIfaceDataAlt con inst_tys arg_strs rhs }
tcIfaceAlt _ (tycon, inst_tys) (IfaceTupleAlt _boxity, arg_occs, rhs)
- = ASSERT( isTupleTyCon tycon )
+ = ASSERT2( isTupleTyCon tycon, ppr tycon )
do { let [data_con] = tyConDataCons tycon
; tcIfaceDataAlt data_con inst_tys arg_occs rhs }
\begin{code}
tcIdDetails :: Type -> IfaceIdDetails -> IfL IdDetails
tcIdDetails _ IfVanillaId = return VanillaId
-tcIdDetails _ IfDFunId = return DFunId
-tcIdDetails ty (IfRecSelId naughty)
- = return (RecSelId { sel_tycon = tc, sel_naughty = naughty })
+tcIdDetails ty IfDFunId
+ = return (DFunId (isNewTyCon (classTyCon cls)))
where
- (_, _, tau) = tcSplitSigmaTy ty
- tc = tyConAppTyCon (funArgTy tau)
- -- A bit fragile. Relies on the selector type looking like
- -- forall abc. (stupid-context) => T a b c -> blah
+ (_, cls, _) = tcSplitDFunTy ty
+
+tcIdDetails _ (IfRecSelId tc naughty)
+ = do { tc' <- tcIfaceTyCon tc
+ ; return (RecSelId { sel_tycon = tc', sel_naughty = naughty }) }
tcIdInfo :: Bool -> Name -> Type -> IfaceIdInfo -> IfL IdInfo
tcIdInfo ignore_prags name ty info
init_info = vanillaIdInfo
tcPrag :: IdInfo -> IfaceInfoItem -> IfL IdInfo
- tcPrag info HsNoCafRefs = return (info `setCafInfo` NoCafRefs)
- tcPrag info (HsArity arity) = return (info `setArityInfo` arity)
- tcPrag info (HsStrictness str) = return (info `setAllStrictnessInfo` Just str)
+ tcPrag info HsNoCafRefs = return (info `setCafInfo` NoCafRefs)
+ tcPrag info (HsArity arity) = return (info `setArityInfo` arity)
+ tcPrag info (HsStrictness str) = return (info `setStrictnessInfo` Just str)
+ tcPrag info (HsInline prag) = return (info `setInlinePragInfo` prag)
-- The next two are lazy, so they don't transitively suck stuff in
- tcPrag info (HsWorker nm arity) = tcWorkerInfo ty info nm arity
- tcPrag info (HsInline inline_prag) = return (info `setInlinePragInfo` inline_prag)
- tcPrag info (HsUnfold expr) = do
- maybe_expr' <- tcPragExpr name expr
- let
- -- maybe_expr' doesn't get looked at if the unfolding
- -- is never inspected; so the typecheck doesn't even happen
- unfold_info = case maybe_expr' of
- Nothing -> noUnfolding
- Just expr' -> mkTopUnfolding expr'
- return (info `setUnfoldingInfoLazily` unfold_info)
+ tcPrag info (HsUnfold lb if_unf)
+ = do { unf <- tcUnfolding name ty info if_unf
+ ; let info1 | lb = info `setOccInfo` nonRuleLoopBreaker
+ | otherwise = info
+ ; return (info1 `setUnfoldingInfoLazily` unf) }
\end{code}
\begin{code}
-tcWorkerInfo :: Type -> IdInfo -> Name -> Arity -> IfL IdInfo
-tcWorkerInfo ty info wkr arity
- = do { mb_wkr_id <- forkM_maybe doc (tcIfaceExtId wkr)
+tcUnfolding :: Name -> Type -> IdInfo -> IfaceUnfolding -> IfL Unfolding
+tcUnfolding name _ info (IfCoreUnfold stable if_expr)
+ = do { mb_expr <- tcPragExpr name if_expr
+ ; let unf_src = if stable then InlineStable else InlineRhs
+ ; return (case mb_expr of
+ Nothing -> NoUnfolding
+ Just expr -> mkUnfolding unf_src
+ True {- Top level -}
+ is_bottoming expr) }
+ where
+ -- Strictness should occur before unfolding!
+ is_bottoming = case strictnessInfo info of
+ Just sig -> isBottomingSig sig
+ Nothing -> False
+
+tcUnfolding name _ _ (IfCompulsory if_expr)
+ = do { mb_expr <- tcPragExpr name if_expr
+ ; return (case mb_expr of
+ Nothing -> NoUnfolding
+ Just expr -> mkCompulsoryUnfolding expr) }
+
+tcUnfolding name _ _ (IfInlineRule arity unsat_ok boring_ok if_expr)
+ = do { mb_expr <- tcPragExpr name if_expr
+ ; return (case mb_expr of
+ Nothing -> NoUnfolding
+ Just expr -> mkCoreUnfolding True InlineStable expr arity
+ (UnfWhen unsat_ok boring_ok))
+ }
- -- We return without testing maybe_wkr_id, but as soon as info is
- -- looked at we will test it. That's ok, because its outside the
- -- knot; and there seems no big reason to further defer the
- -- tcIfaceId lookup. (Contrast with tcPragExpr, where postponing walking
- -- over the unfolding until it's actually used does seem worth while.)
+tcUnfolding name ty info (IfWrapper arity wkr)
+ = do { mb_wkr_id <- forkM_maybe doc (tcIfaceExtId wkr)
; us <- newUniqueSupply
-
; return (case mb_wkr_id of
- Nothing -> info
- Just wkr_id -> add_wkr_info us wkr_id info) }
+ Nothing -> noUnfolding
+ Just wkr_id -> make_inline_rule wkr_id us) }
where
- doc = text "Worker for" <+> ppr wkr
- add_wkr_info us wkr_id info
- = info `setUnfoldingInfoLazily` mk_unfolding us wkr_id
- `setWorkerInfo` HasWorker wkr_id arity
+ doc = text "Worker for" <+> ppr name
- mk_unfolding us wkr_id = mkTopUnfolding (initUs_ us (mkWrapper ty strict_sig) wkr_id)
+ make_inline_rule wkr_id us
+ = mkWwInlineRule wkr_id
+ (initUs_ us (mkWrapper ty strict_sig) wkr_id)
+ arity
- -- We are relying here on strictness info always appearing
- -- before worker info, fingers crossed ....
- strict_sig = case newStrictnessInfo info of
+ -- Again we rely here on strictness info always appearing
+ -- before unfolding
+ strict_sig = case strictnessInfo info of
Just sig -> sig
Nothing -> pprPanic "Worker info but no strictness for" (ppr wkr)
+
+tcUnfolding name dfun_ty _ (IfDFunUnfold ops)
+ = do { mb_ops1 <- forkM_maybe doc $ mapM tcIfaceExpr ops
+ ; return (case mb_ops1 of
+ Nothing -> noUnfolding
+ Just ops1 -> mkDFunUnfolding dfun_ty ops1) }
+ where
+ doc = text "Class ops for dfun" <+> ppr name
\end{code}
For unfoldings we try to do the job lazily, so that we never type check
tcIfaceTyCon IfaceListTc = tcWiredInTyCon listTyCon
tcIfaceTyCon IfacePArrTc = tcWiredInTyCon parrTyCon
tcIfaceTyCon (IfaceTupTc bx ar) = tcWiredInTyCon (tupleTyCon bx ar)
+tcIfaceTyCon (IfaceAnyTc kind) = do { tc_kind <- tcIfaceType kind
+ ; tcWiredInTyCon (anyTyConOfKind tc_kind) }
tcIfaceTyCon (IfaceTc name) = do { thing <- tcIfaceGlobal name
; return (check_tc (tyThingTyCon thing)) }
where
tc_info [] = vanillaIdInfo
tc_info (HsInline p : i) = tc_info i `setInlinePragInfo` p
tc_info (HsArity a : i) = tc_info i `setArityInfo` a
- tc_info (HsStrictness s : i) = tc_info i `setAllStrictnessInfo` Just s
+ tc_info (HsStrictness s : i) = tc_info i `setStrictnessInfo` Just s
tc_info (other : i) = pprTrace "tcIfaceLetBndr: discarding unexpected IdInfo"
(ppr other) (tc_info i)
projects / ghc-hetmet.git / blobdiff