Id, DictId,
-- Simple construction
- mkId, mkVanillaId, mkSysLocal, mkUserLocal,
+ mkGlobalId, mkLocalId, mkSpecPragmaId, mkLocalIdWithInfo,
+ mkSysLocal, mkUserLocal, mkVanillaGlobal,
mkTemplateLocals, mkTemplateLocalsNum, mkWildId, mkTemplateLocal,
+ mkWorkerId,
-- Taking an Id apart
idName, idType, idUnique, idInfo,
- idPrimRep, isId,
+ idPrimRep, isId, globalIdDetails,
recordSelectorFieldLabel,
-- Modifying an Id
- setIdName, setIdUnique, setIdType, setIdNoDiscard,
+ setIdName, setIdUnique, setIdType, setIdNoDiscard, setGlobalIdDetails,
setIdInfo, lazySetIdInfo, modifyIdInfo, maybeModifyIdInfo,
- zapFragileIdInfo, zapLamIdInfo,
+ zapLamIdInfo, zapDemandIdInfo,
-- Predicates
- omitIfaceSigForId, isDeadBinder,
- exportWithOrigOccName,
- externallyVisibleId,
- idFreeTyVars,
- isIP,
- isSpecPragmaId, isRecordSelector,
+ isImplicitId, isDeadBinder,
+ isSpecPragmaId, isExportedId, isLocalId, isGlobalId,
+ isRecordSelector,
isPrimOpId, isPrimOpId_maybe,
- isDataConId, isDataConId_maybe, isDataConWrapId,
- isDataConWrapId_maybe,
+ isDataConId, isDataConId_maybe,
+ isDataConWrapId, isDataConWrapId_maybe,
isBottomingId,
- isExportedId, isUserExportedId,
hasNoBinding,
-- Inline pragma stuff
setIdArityInfo,
setIdDemandInfo,
setIdStrictness,
+ setIdTyGenInfo,
setIdWorkerInfo,
setIdSpecialisation,
setIdCafInfo,
setIdOccInfo,
idArity, idArityInfo,
- idFlavour,
idDemandInfo,
idStrictness,
+ idTyGenInfo,
idWorkerInfo,
idUnfolding,
idSpecialisation,
import CoreSyn ( Unfolding, CoreRules )
import BasicTypes ( Arity )
import Var ( Id, DictId,
- isId, mkIdVar,
- idName, idType, idUnique, idInfo,
- setIdName, setVarType, setIdUnique,
+ isId, isExportedId, isSpecPragmaId, isLocalId,
+ idName, idType, idUnique, idInfo, isGlobalId,
+ setIdName, setVarType, setIdUnique, setIdNoDiscard,
setIdInfo, lazySetIdInfo, modifyIdInfo,
maybeModifyIdInfo,
- externallyVisibleId
+ globalIdDetails, setGlobalIdDetails
)
-import VarSet
-import Type ( Type, tyVarsOfType, typePrimRep, addFreeTyVars,
- seqType, splitTyConApp_maybe )
+import qualified Var ( mkLocalId, mkGlobalId, mkSpecPragmaId )
+import Type ( Type, typePrimRep, addFreeTyVars,
+ usOnce, seqType, splitTyConApp_maybe )
import IdInfo
import Demand ( Demand )
import Name ( Name, OccName,
mkSysLocalName, mkLocalName,
- isUserExportedName, getOccName, isIPOcc
+ getOccName, getSrcLoc
)
-import OccName ( UserFS )
+import OccName ( UserFS, mkWorkerOcc )
import PrimRep ( PrimRep )
import TysPrim ( statePrimTyCon )
import FieldLabel ( FieldLabel )
import SrcLoc ( SrcLoc )
import Unique ( Unique, mkBuiltinUnique, getBuiltinUniques,
getNumBuiltinUniques )
+import Outputable
infixl 1 `setIdUnfolding`,
`setIdArityInfo`,
`setIdDemandInfo`,
`setIdStrictness`,
+ `setIdTyGenInfo`,
`setIdWorkerInfo`,
`setIdSpecialisation`,
`setInlinePragma`,
%* *
%************************************************************************
-Absolutely all Ids are made by mkId. It
- a) Pins free-tyvar-info onto the Id's type,
- where it can easily be found.
- b) Ensures that exported Ids are
+Absolutely all Ids are made by mkId. It is just like Var.mkId,
+but in addition it pins free-tyvar-info onto the Id's type,
+where it can easily be found.
\begin{code}
-mkId :: Name -> Type -> IdInfo -> Id
-mkId name ty info = mkIdVar name (addFreeTyVars ty) info'
- where
- info' | isUserExportedName name = setNoDiscardInfo info
- | otherwise = info
+mkLocalIdWithInfo :: Name -> Type -> IdInfo -> Id
+mkLocalIdWithInfo name ty info = Var.mkLocalId name (addFreeTyVars ty) info
+
+mkSpecPragmaId :: OccName -> Unique -> Type -> SrcLoc -> Id
+mkSpecPragmaId occ uniq ty loc = Var.mkSpecPragmaId (mkLocalName uniq occ loc)
+ (addFreeTyVars ty)
+ noCafIdInfo
+
+mkGlobalId :: GlobalIdDetails -> Name -> Type -> IdInfo -> Id
+mkGlobalId details name ty info = Var.mkGlobalId details name (addFreeTyVars ty) info
\end{code}
\begin{code}
-mkVanillaId :: Name -> Type -> Id
-mkVanillaId name ty = mkId name ty vanillaIdInfo
+mkLocalId :: Name -> Type -> Id
+mkLocalId name ty = mkLocalIdWithInfo name ty noCafIdInfo
-- SysLocal: for an Id being created by the compiler out of thin air...
-- UserLocal: an Id with a name the user might recognize...
mkUserLocal :: OccName -> Unique -> Type -> SrcLoc -> Id
mkSysLocal :: UserFS -> Unique -> Type -> Id
+mkVanillaGlobal :: Name -> Type -> IdInfo -> Id
-mkSysLocal fs uniq ty = mkVanillaId (mkSysLocalName uniq fs) ty
-mkUserLocal occ uniq ty loc = mkVanillaId (mkLocalName uniq occ loc) ty
+mkSysLocal fs uniq ty = mkLocalId (mkSysLocalName uniq fs) ty
+mkUserLocal occ uniq ty loc = mkLocalId (mkLocalName uniq occ loc) ty
+mkVanillaGlobal = mkGlobalId VanillaGlobal
\end{code}
Make some local @Ids@ for a template @CoreExpr@. These have bogus
@Uniques@, but that's OK because the templates are supposed to be
instantiated before use.
-
+
\begin{code}
-- "Wild Id" typically used when you need a binder that you don't expect to use
mkWildId :: Type -> Id
mkWildId ty = mkSysLocal SLIT("wild") (mkBuiltinUnique 1) ty
+mkWorkerId :: Unique -> Id -> Type -> Id
+-- A worker gets a local name. CoreTidy will globalise it if necessary.
+mkWorkerId uniq unwrkr ty
+ = mkLocalId wkr_name ty
+ where
+ wkr_name = mkLocalName uniq (mkWorkerOcc (getOccName unwrkr)) (getSrcLoc unwrkr)
+
-- "Template locals" typically used in unfoldings
mkTemplateLocals :: [Type] -> [Id]
mkTemplateLocals tys = zipWith (mkSysLocal SLIT("tpl"))
tys
mkTemplateLocalsNum :: Int -> [Type] -> [Id]
+-- The Int gives the starting point for unique allocation
mkTemplateLocalsNum n tys = zipWith (mkSysLocal SLIT("tpl"))
- (getNumBuiltinUniques n (length tys))
- tys
+ (getNumBuiltinUniques n (length tys))
+ tys
mkTemplateLocal :: Int -> Type -> Id
mkTemplateLocal i ty = mkSysLocal SLIT("tpl") (mkBuiltinUnique i) ty
%************************************************************************
\begin{code}
-idFreeTyVars :: Id -> TyVarSet
-idFreeTyVars id = tyVarsOfType (idType id)
-
setIdType :: Id -> Type -> Id
-- Add free tyvar info to the type
setIdType id ty = seqType ty `seq` setVarType id (addFreeTyVars ty)
%* *
%************************************************************************
-\begin{code}
-idFlavour :: Id -> IdFlavour
-idFlavour id = flavourInfo (idInfo id)
+The @SpecPragmaId@ exists only to make Ids that are
+on the *LHS* of bindings created by SPECIALISE pragmas;
+eg: s = f Int d
+The SpecPragmaId is never itself mentioned; it
+exists solely so that the specialiser will find
+the call to f, and make specialised version of it.
+The SpecPragmaId binding is discarded by the specialiser
+when it gathers up overloaded calls.
+Meanwhile, it is not discarded as dead code.
-setIdNoDiscard :: Id -> Id
-setIdNoDiscard id -- Make an Id into a NoDiscardId, unless it is already
- = modifyIdInfo setNoDiscardInfo id
+\begin{code}
recordSelectorFieldLabel :: Id -> FieldLabel
-recordSelectorFieldLabel id = case idFlavour id of
- RecordSelId lbl -> lbl
+recordSelectorFieldLabel id = case globalIdDetails id of
+ RecordSelId lbl -> lbl
-isRecordSelector id = case idFlavour id of
+isRecordSelector id = case globalIdDetails id of
RecordSelId lbl -> True
other -> False
-isPrimOpId id = case idFlavour id of
+isPrimOpId id = case globalIdDetails id of
PrimOpId op -> True
other -> False
-isPrimOpId_maybe id = case idFlavour id of
+isPrimOpId_maybe id = case globalIdDetails id of
PrimOpId op -> Just op
other -> Nothing
-isDataConId id = case idFlavour id of
+isDataConId id = case globalIdDetails id of
DataConId _ -> True
other -> False
-isDataConId_maybe id = case idFlavour id of
+isDataConId_maybe id = case globalIdDetails id of
DataConId con -> Just con
other -> Nothing
-isDataConWrapId_maybe id = case idFlavour id of
+isDataConWrapId_maybe id = case globalIdDetails id of
DataConWrapId con -> Just con
other -> Nothing
-isDataConWrapId id = case idFlavour id of
+isDataConWrapId id = case globalIdDetails id of
DataConWrapId con -> True
other -> False
-isSpecPragmaId id = case idFlavour id of
- SpecPragmaId -> True
- other -> False
-
-hasNoBinding id = case idFlavour id of
- DataConId _ -> True
- PrimOpId _ -> True
- other -> False
-- hasNoBinding returns True of an Id which may not have a
-- binding, even though it is defined in this module. Notably,
-- the constructors of a dictionary are in this situation.
+hasNoBinding id = case globalIdDetails id of
+ DataConId _ -> True
+ PrimOpId _ -> True
+ other -> False
--- Don't drop a binding for an exported Id,
--- if it otherwise looks dead.
-isExportedId :: Id -> Bool
-isExportedId id = case idFlavour id of
- VanillaId -> False
- other -> True -- All the others are no-discard
-
--- Say if an Id was exported by the user
--- Implies isExportedId (see mkId above)
-isUserExportedId :: Id -> Bool
-isUserExportedId id = isUserExportedName (idName id)
-\end{code}
-
-
-omitIfaceSigForId tells whether an Id's info is implied by other declarations,
-so we don't need to put its signature in an interface file, even if it's mentioned
-in some other interface unfolding.
-
-\begin{code}
-omitIfaceSigForId :: Id -> Bool
-omitIfaceSigForId id
- | otherwise
- = case idFlavour id of
+isImplicitId :: Id -> Bool
+ -- isImplicitId tells whether an Id's info is implied by other
+ -- declarations, so we don't need to put its signature in an interface
+ -- file, even if it's mentioned in some other interface unfolding.
+isImplicitId id
+ = case globalIdDetails id of
RecordSelId _ -> True -- Includes dictionary selectors
PrimOpId _ -> True
DataConId _ -> True
-- remember that all type and class decls appear in the interface file.
-- The dfun id must *not* be omitted, because it carries version info for
-- the instance decl
-
- other -> False -- Don't omit!
-
--- Certain names must be exported with their original occ names, because
--- these names are bound by either a class declaration or a data declaration
--- or an explicit user export.
-exportWithOrigOccName :: Id -> Bool
-exportWithOrigOccName id = omitIfaceSigForId id || isUserExportedId id
+ other -> False
\end{code}
\begin{code}
isDeadBinder :: Id -> Bool
isDeadBinder bndr | isId bndr = isDeadOcc (idOccInfo bndr)
| otherwise = False -- TyVars count as not dead
-
-isIP id = isIPOcc (getOccName id)
\end{code}
isBottomingId id = isBottomingStrictness (idStrictness id)
---------------------------------
+ -- TYPE GENERALISATION
+idTyGenInfo :: Id -> TyGenInfo
+idTyGenInfo id = tyGenInfo (idInfo id)
+
+setIdTyGenInfo :: Id -> TyGenInfo -> Id
+setIdTyGenInfo id tygen_info = modifyIdInfo (`setTyGenInfo` tygen_info) id
+
+ ---------------------------------
-- WORKER ID
idWorkerInfo :: Id -> WorkerInfo
idWorkerInfo id = workerInfo (idInfo id)
idLBVarInfo id = lbvarInfo (idInfo id)
isOneShotLambda :: Id -> Bool
-isOneShotLambda id = case idLBVarInfo id of
- IsOneShotLambda -> True
- NoLBVarInfo -> case splitTyConApp_maybe (idType id) of
- Just (tycon,_) -> tycon == statePrimTyCon
- other -> False
+isOneShotLambda id = analysis || hack
+ where analysis = case idLBVarInfo id of
+ LBVarInfo u | u == usOnce -> True
+ other -> False
+ hack = case splitTyConApp_maybe (idType id) of
+ Just (tycon,_) | tycon == statePrimTyCon -> True
+ other -> False
+
-- The last clause is a gross hack. It claims that
-- every function over realWorldStatePrimTy is a one-shot
-- function. This is pretty true in practice, and makes a big
-- spot that fill_in has arity 2 (and when Keith is done, we will) but we can't yet.
setOneShotLambda :: Id -> Id
-setOneShotLambda id = modifyIdInfo (`setLBVarInfo` IsOneShotLambda) id
+setOneShotLambda id = modifyIdInfo (`setLBVarInfo` LBVarInfo usOnce) id
clearOneShotLambda :: Id -> Id
clearOneShotLambda id
\end{code}
\begin{code}
-zapFragileIdInfo :: Id -> Id
-zapFragileIdInfo id = maybeModifyIdInfo zapFragileInfo id
-
zapLamIdInfo :: Id -> Id
zapLamIdInfo id = maybeModifyIdInfo zapLamInfo id
-\end{code}
-
-
-
-
-
-
-
-
-
-
+zapDemandIdInfo id = maybeModifyIdInfo zapDemandInfo id
+\end{code}
projects / ghc-hetmet.git / blobdiff