X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FbasicTypes%2FId.lhs;h=d8ae31dc3efdda762d13591dc52908f3455cb867;hb=b4d00dc0af1f633aa4a4fd519142cc2d466ede79;hp=549a58bb5d2773d7608e804cd61154566049cf04;hpb=8100cd4395e46ae747be4298c181a4730d6206bc;p=ghc-hetmet.git diff --git a/compiler/basicTypes/Id.lhs b/compiler/basicTypes/Id.lhs index 549a58b..d8ae31d 100644 --- a/compiler/basicTypes/Id.lhs +++ b/compiler/basicTypes/Id.lhs @@ -25,7 +25,7 @@ module Id ( zapLamIdInfo, zapDemandIdInfo, zapFragileIdInfo, -- Predicates - isImplicitId, isDeadBinder, isDictId, + isImplicitId, isDeadBinder, isDictId, isStrictId, isExportedId, isLocalId, isGlobalId, isRecordSelector, isNaughtyRecordSelector, isClassOpId_maybe, @@ -97,6 +97,9 @@ import DataCon import NewDemand import Name import Module +import Class +import PrimOp +import ForeignCall import OccName import Maybes import SrcLoc @@ -154,7 +157,7 @@ mkSysLocal fs uniq ty = mkLocalId (mkSystemVarName uniq fs) ty -- UserLocal: an Id with a name the user might recognize... -mkUserLocal :: OccName -> Unique -> Type -> SrcLoc -> Id +mkUserLocal :: OccName -> Unique -> Type -> SrcSpan -> Id mkVanillaGlobal :: Name -> Type -> IdInfo -> Id mkUserLocal occ uniq ty loc = mkLocalId (mkInternalName uniq occ loc) ty @@ -175,7 +178,7 @@ mkWorkerId :: Unique -> Id -> Type -> Id mkWorkerId uniq unwrkr ty = mkLocalId wkr_name ty where - wkr_name = mkInternalName uniq (mkWorkerOcc (getOccName unwrkr)) (getSrcLoc unwrkr) + wkr_name = mkInternalName uniq (mkWorkerOcc (getOccName unwrkr)) (getSrcSpan unwrkr) -- "Template locals" typically used in unfoldings mkTemplateLocals :: [Type] -> [Id] @@ -214,51 +217,64 @@ idPrimRep id = typePrimRep (idType id) \begin{code} recordSelectorFieldLabel :: Id -> (TyCon, FieldLabel) -recordSelectorFieldLabel id = case globalIdDetails id of - RecordSelId tycon lbl _ -> (tycon,lbl) - other -> panic "recordSelectorFieldLabel" +recordSelectorFieldLabel id + = case globalIdDetails id of + RecordSelId { sel_tycon = tycon, sel_label = lbl } -> (tycon,lbl) + _ -> panic "recordSelectorFieldLabel" + +isRecordSelector :: Var -> Bool +isNaughtyRecordSelector :: Var -> Bool +isPrimOpId :: Var -> Bool +isFCallId :: Var -> Bool +isDataConWorkId :: Var -> Bool +hasNoBinding :: Var -> Bool + +isClassOpId_maybe :: Var -> Maybe Class +isPrimOpId_maybe :: Var -> Maybe PrimOp +isFCallId_maybe :: Var -> Maybe ForeignCall +isDataConWorkId_maybe :: Var -> Maybe DataCon isRecordSelector id = case globalIdDetails id of - RecordSelId {} -> True - other -> False + RecordSelId {} -> True + _ -> False isNaughtyRecordSelector id = case globalIdDetails id of - RecordSelId { sel_naughty = n } -> n - other -> False + RecordSelId { sel_naughty = n } -> n + _ -> False isClassOpId_maybe id = case globalIdDetails id of ClassOpId cls -> Just cls _other -> Nothing isPrimOpId id = case globalIdDetails id of - PrimOpId op -> True - other -> False + PrimOpId _ -> True + _ -> False isPrimOpId_maybe id = case globalIdDetails id of - PrimOpId op -> Just op - other -> Nothing + PrimOpId op -> Just op + _ -> Nothing isFCallId id = case globalIdDetails id of - FCallId call -> True - other -> False + FCallId _ -> True + _ -> False isFCallId_maybe id = case globalIdDetails id of - FCallId call -> Just call - other -> Nothing + FCallId call -> Just call + _ -> Nothing isDataConWorkId id = case globalIdDetails id of - DataConWorkId _ -> True - other -> False + DataConWorkId _ -> True + _ -> False isDataConWorkId_maybe id = case globalIdDetails id of - DataConWorkId con -> Just con - other -> Nothing + DataConWorkId con -> Just con + _ -> Nothing isDataConId_maybe :: Id -> Maybe DataCon isDataConId_maybe id = case globalIdDetails id of - DataConWorkId con -> Just con - DataConWrapId con -> Just con - other -> Nothing + DataConWorkId con -> Just con + DataConWrapId con -> Just con + _ -> Nothing idDataCon :: Id -> DataCon -- Get from either the worker or the wrapper to the DataCon @@ -266,9 +282,9 @@ idDataCon :: Id -> DataCon -- INVARIANT: idDataCon (dataConWrapId d) = d -- (Remember, dataConWrapId can return either the wrapper or the worker.) idDataCon id = case globalIdDetails id of - DataConWorkId con -> con - DataConWrapId con -> con - other -> pprPanic "idDataCon" (ppr id) + DataConWorkId con -> con + DataConWrapId con -> con + _ -> pprPanic "idDataCon" (ppr id) isDictId :: Id -> Bool @@ -281,10 +297,10 @@ isDictId id = isDictTy (idType id) -- them at the CorePrep stage. -- EXCEPT: unboxed tuples, which definitely have no binding hasNoBinding id = case globalIdDetails id of - PrimOpId _ -> True + PrimOpId _ -> True -- See Note [Primop wrappers] FCallId _ -> True DataConWorkId dc -> isUnboxedTupleCon dc - other -> False + _ -> False isImplicitId :: Id -> Bool -- isImplicitId tells whether an Id's info is implied by other @@ -302,12 +318,27 @@ isImplicitId id -- 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 -- it carries version info for the instance decl - other -> False + _ -> False idIsFrom :: Module -> Id -> Bool idIsFrom mod id = nameIsLocalOrFrom mod (idName id) \end{code} +Note [Primop wrappers] +~~~~~~~~~~~~~~~~~~~~~~ +Currently hasNoBinding claims that PrimOpIds don't have a curried +function definition. But actually they do, in GHC.PrimopWrappers, +which is auto-generated from prelude/primops.txt.pp. So actually, hasNoBinding +could return 'False' for PrimOpIds. + +But we'd need to add something in CoreToStg to swizzle any unsaturated +applications of GHC.Prim.plusInt# to GHC.PrimopWrappers.plusInt#. + +Nota Bene: GHC.PrimopWrappers is needed *regardless*, because it's +used by GHCi, which does not implement primops direct at all. + + + \begin{code} isDeadBinder :: Id -> Bool isDeadBinder bndr | isId bndr = isDeadOcc (idOccInfo bndr) @@ -318,7 +349,7 @@ isDeadBinder bndr | isId bndr = isDeadOcc (idOccInfo bndr) isTickBoxOp :: Id -> Bool isTickBoxOp id = case globalIdDetails id of - TickBoxOpId tick -> True + TickBoxOpId _ -> True _ -> False isTickBoxOp_maybe :: Id -> Maybe TickBoxOp @@ -368,6 +399,20 @@ setIdNewStrictness id sig = modifyIdInfo (`setNewStrictnessInfo` Just sig) id zapIdNewStrictness :: Id -> Id zapIdNewStrictness id = modifyIdInfo (`setNewStrictnessInfo` Nothing) id +\end{code} + +This predicate says whether the id has a strict demand placed on it or +has a type such that it can always be evaluated strictly (e.g., an +unlifted type, but see the comment for isStrictType). We need to +check separately whether has a so-called "strict type" because if +the demand for hasn't been computed yet but has a strict +type, we still want (isStrictId ) to be True. +\begin{code} +isStrictId :: Id -> Bool +isStrictId id + = ASSERT2( isId id, text "isStrictId: not an id: " <+> ppr id ) + (isStrictDmd (idNewDemandInfo id)) || + (isStrictType (idType id)) --------------------------------- -- WORKER ID @@ -487,7 +532,7 @@ isStateHackType ty | otherwise = case splitTyConApp_maybe ty of Just (tycon,_) -> tycon == statePrimTyCon - other -> False + _ -> 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 @@ -533,6 +578,7 @@ zapInfo zapper id = maybeModifyIdInfo (zapper (idInfo id)) id zapLamIdInfo :: Id -> Id zapLamIdInfo = zapInfo zapLamInfo +zapDemandIdInfo :: Id -> Id zapDemandIdInfo = zapInfo zapDemandInfo zapFragileIdInfo :: Id -> Id