Id, DictId,
-- Simple construction
- mkGlobalId, mkLocalId, mkSpecPragmaId, mkLocalIdWithInfo,
+ mkGlobalId, mkLocalId, mkSpecPragmaId, mkLocalIdWithInfo,
mkSysLocal, mkSysLocalUnencoded, mkUserLocal, mkVanillaGlobal,
mkTemplateLocals, mkTemplateLocalsNum, mkWildId, mkTemplateLocal,
- mkWorkerId,
+ mkWorkerId, mkExportedLocalId,
-- Taking an Id apart
idName, idType, idUnique, idInfo,
- idPrimRep, isId, globalIdDetails,
+ isId, globalIdDetails, idPrimRep,
recordSelectorFieldLabel,
-- Modifying an Id
- setIdName, setIdUnique, setIdType, setIdLocalExported, setGlobalIdDetails,
+ setIdName, setIdUnique, Id.setIdType, setIdLocalExported,
setIdInfo, lazySetIdInfo, modifyIdInfo, maybeModifyIdInfo,
zapLamIdInfo, zapDemandIdInfo,
isPrimOpId, isPrimOpId_maybe,
isFCallId, isFCallId_maybe,
isDataConWorkId, isDataConWorkId_maybe,
- isDataConWrapId, isDataConWrapId_maybe,
- isBottomingId,
- hasNoBinding,
+ isBottomingId, idIsFrom,
+ hasNoBinding,
-- Inline pragma stuff
idInlinePragma, setInlinePragma, modifyInlinePragma,
-- One shot lambda stuff
- isOneShotLambda, setOneShotLambda, clearOneShotLambda,
+ isOneShotBndr, isOneShotLambda, isStateHackType,
+ setOneShotLambda, clearOneShotLambda,
-- IdInfo stuff
setIdUnfolding,
import Var ( Id, DictId,
isId, isExportedId, isSpecPragmaId, isLocalId,
idName, idType, idUnique, idInfo, isGlobalId,
- setIdName, setVarType, setIdUnique, setIdLocalExported,
+ setIdName, setIdType, setIdUnique, setIdLocalExported,
setIdInfo, lazySetIdInfo, modifyIdInfo,
maybeModifyIdInfo,
- globalIdDetails, setGlobalIdDetails
+ globalIdDetails
)
-import qualified Var ( mkLocalId, mkGlobalId, mkSpecPragmaId )
-import Type ( Type, typePrimRep, addFreeTyVars,
- seqType, splitTyConApp_maybe )
-
+import qualified Var ( mkLocalId, mkGlobalId, mkSpecPragmaId, mkExportedLocalId )
+import Type ( Type, typePrimRep, addFreeTyVars, seqType,
+ splitTyConApp_maybe, PrimRep )
+import TysPrim ( statePrimTyCon )
import IdInfo
+#ifdef OLD_STRICTNESS
import qualified Demand ( Demand )
+#endif
import DataCon ( isUnboxedTupleCon )
import NewDemand ( Demand, StrictSig, topDmd, topSig, isBottomingSig )
-import Name ( Name, OccName,
+import Name ( Name, OccName, nameIsLocalOrFrom,
mkSystemName, mkSystemNameEncoded, mkInternalName,
getOccName, getSrcLoc
)
+import Module ( Module )
import OccName ( EncodedFS, mkWorkerOcc )
-import PrimRep ( PrimRep )
import FieldLabel ( FieldLabel )
import Maybes ( orElse )
import SrcLoc ( SrcLoc )
import Outputable
import Unique ( Unique, mkBuiltinUnique )
+import CmdLineOpts ( opt_NoStateHack )
-- infixl so you can say (id `set` a `set` b)
infixl 1 `setIdUnfolding`,
mkSpecPragmaId :: Name -> Type -> Id
mkSpecPragmaId name ty = Var.mkSpecPragmaId name (addFreeTyVars ty) vanillaIdInfo
+mkExportedLocalId :: Name -> Type -> Id
+mkExportedLocalId name ty = Var.mkExportedLocalId name (addFreeTyVars ty) vanillaIdInfo
+
mkGlobalId :: GlobalIdDetails -> Name -> Type -> IdInfo -> Id
mkGlobalId details name ty info = Var.mkGlobalId details name (addFreeTyVars ty) info
\end{code}
\begin{code}
setIdType :: Id -> Type -> Id
-- Add free tyvar info to the type
-setIdType id ty = seqType ty `seq` setVarType id (addFreeTyVars ty)
+setIdType id ty = seqType ty `seq` Var.setIdType id (addFreeTyVars ty)
idPrimRep :: Id -> PrimRep
idPrimRep id = typePrimRep (idType id)
recordSelectorFieldLabel :: Id -> FieldLabel
recordSelectorFieldLabel id = case globalIdDetails id of
RecordSelId lbl -> lbl
+ other -> panic "recordSelectorFieldLabel"
isRecordSelector id = case globalIdDetails id of
RecordSelId lbl -> True
DataConWorkId con -> Just con
other -> Nothing
-isDataConWrapId_maybe id = case globalIdDetails id of
- DataConWrapId con -> Just con
- other -> Nothing
-
-isDataConWrapId id = case globalIdDetails id of
- DataConWrapId con -> True
- other -> False
-
-- hasNoBinding returns True of an Id which may not have a
-- binding, even though it is defined in this module.
-- Data constructor workers used to be things of this kind, but
FCallId _ -> True
PrimOpId _ -> True
ClassOpId _ -> True
- GenericOpId _ -> True
DataConWorkId _ -> True
DataConWrapId _ -> True
-- These are are implied by their type or class decl;
-- The dfun id is not an implicit Id; it must *not* be omitted, because
-- it carries version info for the instance decl
other -> False
+
+idIsFrom :: Module -> Id -> Bool
+idIsFrom mod id = nameIsLocalOrFrom mod (idName id)
\end{code}
\begin{code}
idLBVarInfo :: Id -> LBVarInfo
idLBVarInfo id = lbvarInfo (idInfo id)
+isOneShotBndr :: Id -> Bool
+-- This one is the "business end", called externally.
+-- Its main purpose is to encapsulate the Horrible State Hack
+isOneShotBndr id = isOneShotLambda id || (isStateHackType (idType id))
+
+isStateHackType :: Type -> Bool
+isStateHackType ty
+ | opt_NoStateHack
+ = False
+ | otherwise
+ = case splitTyConApp_maybe ty of
+ Just (tycon,_) -> tycon == statePrimTyCon
+ other -> False
+ -- This 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
+ -- difference. For example, consider
+ -- a `thenST` \ r -> ...E...
+ -- The early full laziness pass, if it doesn't know that r is one-shot
+ -- will pull out E (let's say it doesn't mention r) to give
+ -- let lvl = E in a `thenST` \ r -> ...lvl...
+ -- When `thenST` gets inlined, we end up with
+ -- let lvl = E in \s -> case a s of (r, s') -> ...lvl...
+ -- and we don't re-inline E.
+ --
+ -- It would be better to spot that r was one-shot to start with, but
+ -- I don't want to rely on that.
+ --
+ -- Another good example is in fill_in in PrelPack.lhs. We should be able to
+ -- spot that fill_in has arity 2 (and when Keith is done, we will) but we can't yet.
+
+
+-- The OneShotLambda functions simply fiddle with the IdInfo flag
isOneShotLambda :: Id -> Bool
isOneShotLambda id = case idLBVarInfo id of
IsOneShotLambda -> True
projects / ghc-hetmet.git / blobdiff