-- ** Simple construction
mkGlobalId, mkVanillaGlobal, mkVanillaGlobalWithInfo,
- mkLocalId, mkLocalIdWithInfo,
+ mkLocalId, mkLocalIdWithInfo, mkExportedLocalId,
mkSysLocal, mkSysLocalM, mkUserLocal, mkUserLocalM,
- mkTemplateLocals, mkTemplateLocalsNum, mkWildId, mkTemplateLocal,
- mkWorkerId, mkExportedLocalId,
+ mkTemplateLocals, mkTemplateLocalsNum, mkTemplateLocal,
+ mkWorkerId,
-- ** Taking an Id apart
- idName, idType, idUnique, idInfo,
- isId, globalIdDetails, idPrimRep,
+ idName, idType, idUnique, idInfo, idDetails,
+ isId, idPrimRep,
recordSelectorFieldLabel,
-- ** Modifying an Id
- setIdName, setIdUnique, Id.setIdType, setIdExported, setIdNotExported,
- globaliseId, setIdInfo, lazySetIdInfo, modifyIdInfo, maybeModifyIdInfo,
+ setIdName, setIdUnique, Id.setIdType,
+ setIdExported, setIdNotExported,
+ globaliseId, localiseId,
+ setIdInfo, lazySetIdInfo, modifyIdInfo, maybeModifyIdInfo,
zapLamIdInfo, zapDemandIdInfo, zapFragileIdInfo, transferPolyIdInfo,
+
-- ** Predicates on Ids
isImplicitId, isDeadBinder, isDictId, isStrictId,
isExportedId, isLocalId, isGlobalId,
isRecordSelector, isNaughtyRecordSelector,
- isClassOpId_maybe,
+ isClassOpId_maybe, isDFunId,
isPrimOpId, isPrimOpId_maybe,
isFCallId, isFCallId_maybe,
isDataConWorkId, isDataConWorkId_maybe, isDataConId_maybe, idDataCon,
- isBottomingId, idIsFrom,
+ isConLikeId, isBottomingId, idIsFrom,
isTickBoxOp, isTickBoxOp_maybe,
hasNoBinding,
-- ** Inline pragma stuff
- idInlinePragma, setInlinePragma, modifyInlinePragma,
+ idInlinePragma, setInlinePragma, modifyInlinePragma,
+ idInlineActivation, setInlineActivation, idRuleMatchInfo,
-- ** One-shot lambdas
isOneShotBndr, isOneShotLambda, isStateHackType,
idArity,
idNewDemandInfo, idNewDemandInfo_maybe,
idNewStrictness, idNewStrictness_maybe,
- idWorkerInfo,
idUnfolding,
idSpecialisation, idCoreRules, idHasRules,
idCafInfo,
setIdArity,
setIdNewDemandInfo,
setIdNewStrictness, zapIdNewStrictness,
- setIdWorkerInfo,
setIdSpecialisation,
setIdCafInfo,
- setIdOccInfo,
+ setIdOccInfo, zapIdOccInfo,
#ifdef OLD_STRICTNESS
setIdStrictness,
import IdInfo
import BasicTypes
+
+-- Imported and re-exported
+import Var( Var, Id, DictId,
+ idInfo, idDetails, globaliseId,
+ isId, isLocalId, isGlobalId, isExportedId )
import qualified Var
-import Var
+
import TyCon
import Type
import TcType
import Class
import PrimOp
import ForeignCall
-import OccName
import Maybes
import SrcLoc
import Outputable
import Unique
import UniqSupply
import FastString
+import Util( count )
import StaticFlags
-- infixl so you can say (id `set` a `set` b)
`setIdArity`,
`setIdNewDemandInfo`,
`setIdNewStrictness`,
- `setIdWorkerInfo`,
`setIdSpecialisation`,
`setInlinePragma`,
`idCafInfo`
idName = Var.varName
idUnique :: Id -> Unique
-idUnique = varUnique
+idUnique = Var.varUnique
idType :: Id -> Kind
-idType = varType
-
-idInfo :: Id -> IdInfo
-idInfo = varIdInfo
+idType = Var.varType
idPrimRep :: Id -> PrimRep
idPrimRep id = typePrimRep (idType id)
-globalIdDetails :: Id -> GlobalIdDetails
-globalIdDetails = globalIdVarDetails
-
-
setIdName :: Id -> Name -> Id
-setIdName = setVarName
+setIdName = Var.setVarName
setIdUnique :: Id -> Unique -> Id
-setIdUnique = setVarUnique
+setIdUnique = Var.setVarUnique
-- | Not only does this set the 'Id' 'Type', it also evaluates the type to try and
-- reduce space usage
setIdType id ty = seqType ty `seq` Var.setVarType id ty
setIdExported :: Id -> Id
-setIdExported = setIdVarExported
+setIdExported = Var.setIdExported
setIdNotExported :: Id -> Id
-setIdNotExported = setIdVarNotExported
-
-globaliseId :: GlobalIdDetails -> Id -> Id
-globaliseId = globaliseIdVar
+setIdNotExported = Var.setIdNotExported
+
+localiseId :: Id -> Id
+-- Make an with the same unique and type as the
+-- incoming Id, but with an *Internal* Name and *LocalId* flavour
+localiseId id
+ | isLocalId id && isInternalName name
+ = id
+ | otherwise
+ = mkLocalIdWithInfo (localiseName name) (idType id) (idInfo id)
+ where
+ name = idName id
lazySetIdInfo :: Id -> IdInfo -> Id
-lazySetIdInfo = lazySetVarIdInfo
+lazySetIdInfo = Var.lazySetIdInfo
setIdInfo :: Id -> IdInfo -> Id
setIdInfo id info = seqIdInfo info `seq` (lazySetIdInfo id info)
\begin{code}
-- | For an explanation of global vs. local 'Id's, see "Var#globalvslocal"
-mkGlobalId :: GlobalIdDetails -> Name -> Type -> IdInfo -> Id
-mkGlobalId = mkGlobalIdVar
+mkGlobalId :: IdDetails -> Name -> Type -> IdInfo -> Id
+mkGlobalId = Var.mkGlobalVar
-- | Make a global 'Id' without any extra information at all
mkVanillaGlobal :: Name -> Type -> Id
-- | Make a global 'Id' with no global information but some generic 'IdInfo'
mkVanillaGlobalWithInfo :: Name -> Type -> IdInfo -> Id
-mkVanillaGlobalWithInfo = mkGlobalId VanillaGlobal
+mkVanillaGlobalWithInfo = mkGlobalId VanillaId
-- | For an explanation of global vs. local 'Id's, see "Var#globalvslocal"
mkLocalId name ty = mkLocalIdWithInfo name ty vanillaIdInfo
mkLocalIdWithInfo :: Name -> Type -> IdInfo -> Id
-mkLocalIdWithInfo = mkLocalIdVar
+mkLocalIdWithInfo name ty info = Var.mkLocalVar VanillaId name ty info
-- Note [Free type variables]
--- | Create a local 'Id' that is marked as exported. This prevents things attached to it from being removed as dead code.
+-- | Create a local 'Id' that is marked as exported.
+-- This prevents things attached to it from being removed as dead code.
mkExportedLocalId :: Name -> Type -> Id
-mkExportedLocalId name ty = mkExportedLocalIdVar name ty vanillaIdInfo
+mkExportedLocalId name ty = Var.mkExportedLocalVar VanillaId name ty vanillaIdInfo
-- Note [Free type variables]
--- | Create a system local 'Id'. These are local 'Id's (see "Var#globalvslocal") that are created by the compiler out of thin air
+-- | Create a system local 'Id'. These are local 'Id's (see "Var#globalvslocal")
+-- that are created by the compiler out of thin air
mkSysLocal :: FastString -> Unique -> Type -> Id
mkSysLocal fs uniq ty = mkLocalId (mkSystemVarName uniq fs) ty
instantiated before use.
\begin{code}
--- | Make a /wild Id/. This is typically used when you need a binder that you don't expect to use
-mkWildId :: Type -> Id
-mkWildId ty = mkSysLocal (fsLit "wild") (mkBuiltinUnique 1) ty
-
-- | Workers get local names. "CoreTidy" will externalise these if necessary
mkWorkerId :: Unique -> Id -> Type -> Id
mkWorkerId uniq unwrkr ty
- = mkLocalId wkr_name ty
- where
- wkr_name = mkInternalName uniq (mkWorkerOcc (getOccName unwrkr)) (getSrcSpan unwrkr)
+ = mkLocalId (mkDerivedInternalName mkWorkerOcc uniq (getName unwrkr)) ty
-- | Create a /template local/: a family of system local 'Id's in bijection with @Int@s, typically used in unfoldings
mkTemplateLocal :: Int -> Type -> Id
%************************************************************************
%* *
-\subsection{Basic predicates on @Id@s}
-%* *
-%************************************************************************
-
-\begin{code}
-isId :: Id -> Bool
-isId = isIdVar
-
--- | For an explanation of global vs. local 'Id's, see "Var#globalvslocal"
-isLocalId :: Id -> Bool
-isLocalId = isLocalIdVar
-
--- | For an explanation of global vs. local 'Id's, see "Var#globalvslocal"
-isGlobalId :: Id -> Bool
-isGlobalId = isGlobalIdVar
-
--- | Determines whether an 'Id' is marked as exported and hence will not be considered dead code
-isExportedId :: Id -> Bool
-isExportedId = isExportedIdVar
-\end{code}
-
-%************************************************************************
-%* *
\subsection{Special Ids}
%* *
%************************************************************************
-- | If the 'Id' is that for a record selector, extract the 'sel_tycon' and label. Panic otherwise
recordSelectorFieldLabel :: Id -> (TyCon, FieldLabel)
recordSelectorFieldLabel id
- = case globalIdDetails id of
- RecordSelId { sel_tycon = tycon, sel_label = lbl } -> (tycon,lbl)
+ = case Var.idDetails id of
+ RecSelId { sel_tycon = tycon } -> (tycon, idName id)
_ -> panic "recordSelectorFieldLabel"
isRecordSelector :: Id -> Bool
isPrimOpId :: Id -> Bool
isFCallId :: Id -> Bool
isDataConWorkId :: Id -> Bool
+isDFunId :: Id -> Bool
isClassOpId_maybe :: Id -> Maybe Class
isPrimOpId_maybe :: Id -> Maybe PrimOp
isFCallId_maybe :: Id -> Maybe ForeignCall
isDataConWorkId_maybe :: Id -> Maybe DataCon
-isRecordSelector id = case globalIdDetails id of
- RecordSelId {} -> True
+isRecordSelector id = case Var.idDetails id of
+ RecSelId {} -> True
_ -> False
-isNaughtyRecordSelector id = case globalIdDetails id of
- RecordSelId { sel_naughty = n } -> n
+isNaughtyRecordSelector id = case Var.idDetails id of
+ RecSelId { sel_naughty = n } -> n
_ -> False
-isClassOpId_maybe id = case globalIdDetails id of
+isClassOpId_maybe id = case Var.idDetails id of
ClassOpId cls -> Just cls
_other -> Nothing
-isPrimOpId id = case globalIdDetails id of
+isPrimOpId id = case Var.idDetails id of
PrimOpId _ -> True
_ -> False
-isPrimOpId_maybe id = case globalIdDetails id of
+isDFunId id = case Var.idDetails id of
+ DFunId _ -> True
+ _ -> False
+
+isPrimOpId_maybe id = case Var.idDetails id of
PrimOpId op -> Just op
_ -> Nothing
-isFCallId id = case globalIdDetails id of
+isFCallId id = case Var.idDetails id of
FCallId _ -> True
_ -> False
-isFCallId_maybe id = case globalIdDetails id of
+isFCallId_maybe id = case Var.idDetails id of
FCallId call -> Just call
_ -> Nothing
-isDataConWorkId id = case globalIdDetails id of
+isDataConWorkId id = case Var.idDetails id of
DataConWorkId _ -> True
_ -> False
-isDataConWorkId_maybe id = case globalIdDetails id of
+isDataConWorkId_maybe id = case Var.idDetails id of
DataConWorkId con -> Just con
_ -> Nothing
isDataConId_maybe :: Id -> Maybe DataCon
-isDataConId_maybe id = case globalIdDetails id of
+isDataConId_maybe id = case Var.idDetails id of
DataConWorkId con -> Just con
DataConWrapId con -> Just con
_ -> Nothing
-- they aren't any more. Instead, we inject a binding for
-- them at the CorePrep stage.
-- EXCEPT: unboxed tuples, which definitely have no binding
-hasNoBinding id = case globalIdDetails id of
+hasNoBinding id = case Var.idDetails id of
PrimOpId _ -> True -- See Note [Primop wrappers]
FCallId _ -> True
DataConWorkId dc -> isUnboxedTupleCon dc
-- 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
- FCallId _ -> True
- PrimOpId _ -> True
- ClassOpId _ -> True
- DataConWorkId _ -> True
- DataConWrapId _ -> True
+ = case Var.idDetails id of
+ FCallId {} -> True
+ ClassOpId {} -> True
+ PrimOpId {} -> True
+ DataConWorkId {} -> True
+ DataConWrapId {} -> True
-- These are are implied by their type or class decl;
-- remember that all type and class decls appear in the interface file.
-- The dfun id is not an implicit Id; it must *not* be omitted, because
\begin{code}
isTickBoxOp :: Id -> Bool
isTickBoxOp id =
- case globalIdDetails id of
+ case Var.idDetails id of
TickBoxOpId _ -> True
_ -> False
isTickBoxOp_maybe :: Id -> Maybe TickBoxOp
isTickBoxOp_maybe id =
- case globalIdDetails id of
+ case Var.idDetails id of
TickBoxOpId tick -> Just tick
_ -> Nothing
\end{code}
(isStrictType (idType id))
---------------------------------
- -- WORKER ID
-idWorkerInfo :: Id -> WorkerInfo
-idWorkerInfo id = workerInfo (idInfo id)
-
-setIdWorkerInfo :: Id -> WorkerInfo -> Id
-setIdWorkerInfo id work_info = modifyIdInfo (`setWorkerInfo` work_info) id
-
- ---------------------------------
-- UNFOLDING
idUnfolding :: Id -> Unfolding
idUnfolding id = unfoldingInfo (idInfo id)
---------------------------------
-- SPECIALISATION
+
+-- See Note [Specialisations and RULES in IdInfo] in IdInfo.lhs
+
idSpecialisation :: Id -> SpecInfo
idSpecialisation id = specInfo (idInfo id)
setIdOccInfo :: Id -> OccInfo -> Id
setIdOccInfo id occ_info = modifyIdInfo (`setOccInfo` occ_info) id
+
+zapIdOccInfo :: Id -> Id
+zapIdOccInfo b = b `setIdOccInfo` NoOccInfo
\end{code}
OK not to if optimisation is switched off.
\begin{code}
-idInlinePragma :: Id -> InlinePragInfo
+idInlinePragma :: Id -> InlinePragma
idInlinePragma id = inlinePragInfo (idInfo id)
-setInlinePragma :: Id -> InlinePragInfo -> Id
+setInlinePragma :: Id -> InlinePragma -> Id
setInlinePragma id prag = modifyIdInfo (`setInlinePragInfo` prag) id
-modifyInlinePragma :: Id -> (InlinePragInfo -> InlinePragInfo) -> Id
+modifyInlinePragma :: Id -> (InlinePragma -> InlinePragma) -> Id
modifyInlinePragma id fn = modifyIdInfo (\info -> info `setInlinePragInfo` (fn (inlinePragInfo info))) id
+
+idInlineActivation :: Id -> Activation
+idInlineActivation id = inlinePragmaActivation (idInlinePragma id)
+
+setInlineActivation :: Id -> Activation -> Id
+setInlineActivation id act = modifyInlinePragma id (\prag -> setInlinePragmaActivation prag act)
+
+idRuleMatchInfo :: Id -> RuleMatchInfo
+idRuleMatchInfo id = inlinePragmaRuleMatchInfo (idInlinePragma id)
+
+isConLikeId :: Id -> Bool
+isConLikeId id = isDataConWorkId id || isConLike (idRuleMatchInfo id)
\end{code}
g' = /\a. rhs
f = /\a. ...[g' a/g]
-we *do not* want to lose the strictness information on g. Nor arity.
+we *do not* want to lose g's
+ * strictness information
+ * arity
+ * inline pragma (though that is bit more debatable)
It's simple to retain strictness and arity, but not so simple to retain
- worker info
- rules
+ * worker info
+ * rules
so we simply discard those. Sooner or later this may bite us.
This transfer is used in two places:
FloatOut (long-distance let-floating)
SimplUtils.abstractFloats (short-distance let-floating)
+If we abstract wrt one or more *value* binders, we must modify the
+arity and strictness info before transferring it. E.g.
+ f = \x. e
+-->
+ g' = \y. \x. e
+ + substitute (g' y) for g
+Notice that g' has an arity one more than the original g
+
\begin{code}
-transferPolyIdInfo :: Id -> Id -> Id
-transferPolyIdInfo old_id new_id
+transferPolyIdInfo :: Id -- Original Id
+ -> [Var] -- Abstract wrt these variables
+ -> Id -- New Id
+ -> Id
+transferPolyIdInfo old_id abstract_wrt new_id
= modifyIdInfo transfer new_id
where
- old_info = idInfo old_id
- transfer new_info = new_info `setNewStrictnessInfo` (newStrictnessInfo old_info)
- `setArityInfo` (arityInfo old_info)
+ arity_increase = count isId abstract_wrt -- Arity increases by the
+ -- number of value binders
+
+ old_info = idInfo old_id
+ old_arity = arityInfo old_info
+ old_inline_prag = inlinePragInfo old_info
+ new_arity = old_arity + arity_increase
+ old_strictness = newStrictnessInfo old_info
+ new_strictness = fmap (increaseStrictSigArity arity_increase) old_strictness
+
+ transfer new_info = new_info `setNewStrictnessInfo` new_strictness
+ `setArityInfo` new_arity
+ `setInlinePragInfo` old_inline_prag
\end{code}
projects / ghc-hetmet.git / blobdiff