-%
+
% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section{Tidying up Core}
\begin{code}
-{-# 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 TidyPgm( mkBootModDetails, tidyProgram ) where
#include "HsVersions.h"
-import DynFlags ( DynFlag(..), DynFlags(..), dopt )
+import DynFlags
import CoreSyn
-import CoreUnfold ( noUnfolding, mkTopUnfolding )
-import CoreFVs ( ruleLhsFreeIds, exprSomeFreeVars )
-import CoreTidy ( tidyExpr, tidyVarOcc, tidyRules )
-import PprCore ( pprRules )
-import CoreLint ( showPass, endPass )
-import CoreUtils ( exprArity, rhsIsStatic )
+import CoreUnfold
+import CoreFVs
+import CoreTidy
+import PprCore
+import CoreLint
+import CoreUtils
import VarEnv
import VarSet
-import Var ( Id, Var )
-import Id ( idType, idInfo, idName, idCoreRules, isGlobalId,
- isExportedId, mkVanillaGlobal, isLocalId, isNaughtyRecordSelector,
- idArity, idCafInfo, idUnfolding, isImplicitId, setIdInfo,
- isTickBoxOp
- )
-import IdInfo {- loads of stuff -}
-import InstEnv ( Instance, DFunId, instanceDFunId, setInstanceDFunId )
-import NewDemand ( isBottomingSig, topSig )
-import BasicTypes ( Arity, isNeverActive, isNonRuleLoopBreaker )
+import Var
+import Id
+import IdInfo
+import InstEnv
+import NewDemand
+import BasicTypes
import Name
-import NameSet ( NameSet, elemNameSet )
-import IfaceEnv ( allocateGlobalBinder )
-import NameEnv ( filterNameEnv, mapNameEnv )
-import OccName ( TidyOccEnv, initTidyOccEnv, tidyOccName )
-import Type ( tidyTopType )
-import TcType ( isFFITy )
-import DataCon ( dataConName, dataConFieldLabels, dataConWrapId_maybe )
-import TyCon ( TyCon, makeTyConAbstract, tyConDataCons, isNewTyCon,
- newTyConRep, tyConSelIds, isAlgTyCon,
- isEnumerationTyCon, isOpenTyCon )
-import Class ( classSelIds )
+import NameSet
+import IfaceEnv
+import NameEnv
+import OccName
+import TcType
+import DataCon
+import TyCon
+import Class
import Module
import HscTypes
-import Maybes ( orElse, mapCatMaybes )
-import ErrUtils ( showPass, dumpIfSet_core )
-import UniqSupply ( splitUniqSupply, uniqFromSupply )
+import Maybes
+import ErrUtils
+import UniqSupply
import Outputable
-import FastTypes hiding ( fastOr )
+import FastTypes hiding (fastOr)
import Data.List ( partition )
import Data.Maybe ( isJust )
import Data.IORef ( IORef, readIORef, writeIORef )
+
+_dummy :: FS.FastString
+_dummy = FSLIT("")
\end{code}
-- We don't look at the bindings at all -- there aren't any
-- for hs-boot files
-mkBootModDetails hsc_env (ModGuts { mg_module = mod
- , mg_exports = exports
+mkBootModDetails hsc_env (ModGuts { mg_exports = exports
, mg_types = type_env
, mg_insts = insts
, mg_fam_insts = fam_insts
- , mg_modBreaks = modBreaks
})
= do { let dflags = hsc_dflags hsc_env
; showPass dflags "Tidy [hoot] type env"
\begin{code}
tidyProgram :: HscEnv -> ModGuts -> IO (CgGuts, ModDetails)
tidyProgram hsc_env
- mod_impl@(ModGuts { mg_module = mod, mg_exports = exports,
+ (ModGuts { mg_module = mod, mg_exports = exports,
mg_types = type_env,
mg_insts = insts, mg_fam_insts = fam_insts,
mg_binds = binds,
})
}
+lookup_dfun :: TypeEnv -> Var -> Id
lookup_dfun type_env dfun_id
= case lookupTypeEnv type_env (idName dfun_id) of
Just (AnId dfun_id') -> dfun_id'
- other -> pprPanic "lookup_dfun" (ppr dfun_id)
+ _other -> pprPanic "lookup_dfun" (ppr dfun_id)
tidyTypeEnv :: Bool -> NameSet -> TypeEnv -> [CoreBind] -> TypeEnv
-- (The bindings bind LocalIds.)
keep_it thing | isWiredInThing thing = False
keep_it (AnId id) = isGlobalId id -- Keep GlobalIds (e.g. class ops)
- keep_it other = True -- Keep all TyCons, DataCons, and Classes
+ keep_it _other = True -- Keep all TyCons, DataCons, and Classes
trim_thing thing
= case thing of
AnId id | isImplicitId id -> thing
| otherwise -> AnId (id `setIdInfo` vanillaIdInfo)
- other -> thing
+ _other -> thing
mustExposeTyCon :: NameSet -- Exports
-> TyCon -- The tycon
-- They are there just so we can get decent error messages
-- See Note [Naughty record selectors] in MkId.lhs
other_implicit_ids (AClass cl) = classSelIds cl
- other_implicit_ids other = []
+ other_implicit_ids _other = []
get_defn :: Id -> CoreBind
get_defn id = NonRec id (tidyExpr emptyTidyEnv rhs)
-- interface file emissions. If the Id isn't in this set, and isn't
-- exported, there's no need to emit anything
need_id needed_set id = id `elemVarEnv` needed_set || isExportedId id
- need_pr needed_set (id,rhs) = need_id needed_set id
+ need_pr needed_set (id,_) = need_id needed_set id
addExternal :: (Id,CoreExpr) -> IdEnv Bool -> IdEnv Bool
-- The Id is needed; extend the needed set
worker_ids = case worker_info of
HasWorker work_id _ -> unitVarSet work_id
- otherwise -> emptyVarSet
+ _otherwise -> emptyVarSet
\end{code}
-> TidyEnv -> CoreBind
-> IO (TidyEnv, CoreBind)
-tidyTopBind this_pkg mod nc_var ext_ids tidy_env1@(occ_env1,subst1) (NonRec bndr rhs)
+tidyTopBind this_pkg mod nc_var ext_ids (occ_env1,subst1) (NonRec bndr rhs)
= do { (occ_env2, name') <- tidyTopName mod nc_var ext_ids occ_env1 bndr
; let { (bndr', rhs') = tidyTopPair ext_ids tidy_env2 caf_info name' (bndr, rhs)
; subst2 = extendVarEnv subst1 bndr bndr'
where
caf_info = hasCafRefs this_pkg subst1 (idArity bndr) rhs
-tidyTopBind this_pkg mod nc_var ext_ids tidy_env1@(occ_env1,subst1) (Rec prs)
+tidyTopBind this_pkg mod nc_var ext_ids (occ_env1,subst1) (Rec prs)
= do { (occ_env2, names') <- tidyTopNames mod nc_var ext_ids occ_env1 bndrs
; let { prs' = zipWith (tidyTopPair ext_ids tidy_env2 caf_info)
names' prs
-- externally visible (see comment at the top of this module). If the name
-- was previously local, we have to give it a unique occurrence name if
-- we intend to externalise it.
-tidyTopNames mod nc_var ext_ids occ_env [] = return (occ_env, [])
+tidyTopNames :: Module -> IORef NameCache -> VarEnv Bool -> TidyOccEnv
+ -> [Id] -> IO (TidyOccEnv, [Name])
+tidyTopNames _mod _nc_var _ext_ids occ_env [] = return (occ_env, [])
tidyTopNames mod nc_var ext_ids occ_env (id:ids)
= do { (occ_env1, name) <- tidyTopName mod nc_var ext_ids occ_env id
; (occ_env2, names) <- tidyTopNames mod nc_var ext_ids occ_env1 ids
; let (nc', new_external_name) = mk_new_external nc
; writeIORef nc_var nc'
; return (occ_env', new_external_name) }
+
+ | otherwise = panic "tidyTopName"
where
name = idName id
external = id `elemVarEnv` ext_ids
ty' = tidyTopType (idType bndr)
rhs' = tidyExpr rhs_tidy_env rhs
idinfo = idInfo bndr
- idinfo' = tidyTopIdInfo rhs_tidy_env (isJust maybe_external)
+ idinfo' = tidyTopIdInfo (isJust maybe_external)
idinfo unfold_info worker_info
arity caf_info
-- occurrences of the binders in RHSs, and hence to occurrences in
-- unfoldings, which are inside Ids imported by GHCi. Ditto RULES.
-- CoreToStg makes use of this when constructing SRTs.
-
-tidyTopIdInfo tidy_env is_external idinfo unfold_info worker_info arity caf_info
+tidyTopIdInfo :: Bool -> IdInfo -> Unfolding
+ -> WorkerInfo -> ArityInfo -> CafInfo
+ -> IdInfo
+tidyTopIdInfo is_external idinfo unfold_info worker_info arity caf_info
| not is_external -- For internal Ids (not externally visible)
= vanillaIdInfo -- we only need enough info for code generation
-- Arity and strictness info are enough;
------------ Worker --------------
-tidyWorker tidy_env show_unfold NoWorker
+tidyWorker :: TidyEnv -> Bool -> WorkerInfo -> WorkerInfo
+tidyWorker _tidy_env _show_unfold NoWorker
= NoWorker
tidyWorker tidy_env show_unfold (HasWorker work_id wrap_arity)
| show_unfold = HasWorker (tidyVarOcc tidy_env work_id) wrap_arity
-- CorePrep later on, and we don't want to duplicate that
-- knowledge in rhsIsStatic below.
+cafRefs :: VarEnv Id -> Expr a -> FastBool
cafRefs p (Var id)
-- imported Ids first:
| not (isLocalId id) = fastBool (mayHaveCafRefs (idCafInfo id))
Just id' -> fastBool (mayHaveCafRefs (idCafInfo id'))
Nothing -> fastBool False
-cafRefs p (Lit l) = fastBool False
+cafRefs _ (Lit _) = fastBool False
cafRefs p (App f a) = fastOr (cafRefs p f) (cafRefs p) a
-cafRefs p (Lam x e) = cafRefs p e
+cafRefs p (Lam _ e) = cafRefs p e
cafRefs p (Let b e) = fastOr (cafRefss p (rhssOfBind b)) (cafRefs p) e
-cafRefs p (Case e bndr _ alts) = fastOr (cafRefs p e) (cafRefss p) (rhssOfAlts alts)
-cafRefs p (Note n e) = cafRefs p e
-cafRefs p (Cast e co) = cafRefs p e
-cafRefs p (Type t) = fastBool False
+cafRefs p (Case e _bndr _ alts) = fastOr (cafRefs p e) (cafRefss p) (rhssOfAlts alts)
+cafRefs p (Note _n e) = cafRefs p e
+cafRefs p (Cast e _co) = cafRefs p e
+cafRefs _ (Type _) = fastBool False
-cafRefss p [] = fastBool False
+cafRefss :: VarEnv Id -> [Expr a] -> FastBool
+cafRefss _ [] = fastBool False
cafRefss p (e:es) = fastOr (cafRefs p e) (cafRefss p) es
+fastOr :: FastBool -> (a -> FastBool) -> a -> FastBool
-- hack for lazy-or over FastBool.
fastOr a f x = fastBool (isFastTrue a || isFastTrue (f x))
\end{code}
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