%
% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
-% $Id: ClosureInfo.lhs,v 1.37 1999/05/11 16:44:02 keithw Exp $
+% $Id: ClosureInfo.lhs,v 1.43 2000/07/14 08:14:53 simonpj Exp $
%
\section[ClosureInfo]{Data structures which describe closures}
import CgRetConv ( assignRegs )
import CLabel ( CLabel, mkStdEntryLabel, mkFastEntryLabel,
mkInfoTableLabel,
- mkConInfoTableLabel, mkStaticClosureLabel,
+ mkConInfoTableLabel,
mkCAFBlackHoleInfoTableLabel,
mkSECAFBlackHoleInfoTableLabel,
mkStaticInfoTableLabel, mkStaticConEntryLabel,
mkReturnPtLabel
)
import CmdLineOpts ( opt_SccProfilingOn, opt_OmitBlackHoling,
- opt_Parallel, opt_DoTickyProfiling )
-import Id ( Id, idType, getIdArity )
-import DataCon ( DataCon, dataConTag, fIRST_TAG,
- isNullaryDataCon, isTupleCon, dataConName
+ opt_Parallel, opt_DoTickyProfiling,
+ opt_SMP )
+import Id ( Id, idType, idArityInfo )
+import DataCon ( DataCon, dataConTag, fIRST_TAG, dataConTyCon,
+ isNullaryDataCon, dataConName
)
+import TyCon ( isBoxedTupleTyCon )
import IdInfo ( ArityInfo(..) )
-import Name ( Name, isExternallyVisibleName, nameUnique )
+import Name ( Name, isExternallyVisibleName, nameUnique,
+ getOccName )
+import OccName ( occNameUserString )
import PprType ( getTyDescription )
import PrimRep ( getPrimRepSize, separateByPtrFollowness, PrimRep )
import SMRep -- all of it
import Type ( isUnLiftedType, Type )
-import BasicTypes ( TopLevelFlag(..) )
+import BasicTypes ( TopLevelFlag(..), isNotTopLevel, isTopLevel )
import Util ( mapAccumL )
import Outputable
\end{code}
mkConLFInfo con
= -- the isNullaryDataCon will do this: ASSERT(isDataCon con)
- (if isTupleCon con then LFTuple else LFCon) con (isNullaryDataCon con)
+ (if isBoxedTupleTyCon (dataConTyCon con) then LFTuple else LFCon)
+ con (isNullaryDataCon con)
mkSelectorLFInfo rhs_ty offset updatable
= LFThunk rhs_ty NotTopLevel False updatable (SelectorThunk offset)
mkLFImported :: Id -> LambdaFormInfo
mkLFImported id
- = case getIdArity id of
+ = case idArityInfo id of
ArityExactly 0 -> LFThunk (idType id)
TopLevel True{-no fvs-}
True{-updatable-} NonStandardThunk
-- not exported:
sizes_from_SMRep :: SMRep -> (Int,Int)
-sizes_from_SMRep (GenericRep ptrs nonptrs _) = (ptrs, nonptrs)
-sizes_from_SMRep (StaticRep ptrs nonptrs _) = (ptrs, nonptrs)
-sizes_from_SMRep ConstantRep = (0, 0)
-sizes_from_SMRep BlackHoleRep = (0, 0)
+sizes_from_SMRep (GenericRep _ ptrs nonptrs _) = (ptrs, nonptrs)
+sizes_from_SMRep BlackHoleRep = (0, 0)
\end{code}
Computing slop size. WARNING: this looks dodgy --- it has deep
computeSlopSize :: Int -> SMRep -> Bool -> Int
-computeSlopSize tot_wds (StaticRep _ _ _) True -- Updatable
+computeSlopSize tot_wds (GenericRep _ _ _ _) True -- Updatable
= max 0 (mIN_UPD_SIZE - tot_wds)
-computeSlopSize tot_wds (StaticRep _ _ _) False
- = 0 -- non updatable, non-heap object
-computeSlopSize tot_wds (GenericRep _ _ _) True -- Updatable
- = max 0 (mIN_UPD_SIZE - tot_wds)
-computeSlopSize tot_wds (GenericRep _ _ _) False
- = max 0 (mIN_SIZE_NonUpdHeapObject - tot_wds)
-computeSlopSize tot_wds ConstantRep _
- = 0
+
+computeSlopSize tot_wds (GenericRep True _ _ _) False -- Non updatable
+ = 0 -- Static
+
+computeSlopSize tot_wds (GenericRep False _ _ _) False -- Non updatable
+ = max 0 (mIN_SIZE_NonUpdHeapObject - tot_wds) -- Dynamic
+
computeSlopSize tot_wds BlackHoleRep _ -- Updatable
= max 0 (mIN_UPD_SIZE - tot_wds)
\end{code}
where
(tot_wds, -- #ptr_wds + #nonptr_wds
ptr_wds, -- #ptr_wds
- things_w_offsets) = mkVirtHeapOffsets sm_rep kind_fn things
+ things_w_offsets) = mkVirtHeapOffsets kind_fn things
sm_rep = chooseDynSMRep lf_info tot_wds ptr_wds
\end{code}
\begin{code}
layOutStaticClosure name kind_fn things lf_info
= (MkClosureInfo name lf_info
- (StaticRep ptr_wds (tot_wds - ptr_wds) closure_type),
+ (GenericRep is_static ptr_wds (tot_wds - ptr_wds) closure_type),
things_w_offsets)
where
(tot_wds, -- #ptr_wds + #nonptr_wds
ptr_wds, -- #ptr_wds
- things_w_offsets) = mkVirtHeapOffsets (StaticRep bot bot bot) kind_fn things
+ things_w_offsets) = mkVirtHeapOffsets kind_fn things
-- constructors with no pointer fields will definitely be NOCAF things.
-- this is a compromise until we can generate both kinds of constructor
-- (a normal static kind and the NOCAF_STATIC kind).
- closure_type = case lf_info of
- LFCon _ _ | ptr_wds == 0 -> CONSTR_NOCAF
- _ -> getStaticClosureType lf_info
-
- bot = panic "layoutStaticClosure"
+ closure_type = getClosureType is_static tot_wds ptr_wds lf_info
+ is_static = True
layOutStaticNoFVClosure :: Name -> LambdaFormInfo -> ClosureInfo
layOutStaticNoFVClosure name lf_info
- = MkClosureInfo name lf_info (StaticRep 0 0 (getStaticClosureType lf_info))
+ = MkClosureInfo name lf_info (GenericRep is_static 0 0 (getClosureType is_static 0 0 lf_info))
+ where
+ is_static = True
\end{code}
%************************************************************************
chooseDynSMRep lf_info tot_wds ptr_wds
= let
- nonptr_wds = tot_wds - ptr_wds
- closure_type = getClosureType tot_wds ptr_wds nonptr_wds lf_info
+ is_static = False
+ nonptr_wds = tot_wds - ptr_wds
+ closure_type = getClosureType is_static tot_wds ptr_wds lf_info
in
- case lf_info of
- LFTuple _ True -> ConstantRep
- LFCon _ True -> ConstantRep
- _ -> GenericRep ptr_wds nonptr_wds closure_type
-
-getStaticClosureType :: LambdaFormInfo -> ClosureType
-getStaticClosureType lf_info =
- case lf_info of
- LFCon con True -> CONSTR_NOCAF
- LFCon con False -> CONSTR
- LFReEntrant _ _ _ _ _ _ -> FUN
- LFTuple _ _ -> CONSTR
- LFThunk _ _ _ _ (SelectorThunk _) _ _ -> THUNK_SELECTOR
- LFThunk _ _ _ True _ _ _ -> THUNK
- LFThunk _ _ _ False _ _ _ -> FUN
- _ -> panic "getClosureType"
+ GenericRep is_static ptr_wds nonptr_wds closure_type
-- we *do* get non-updatable top-level thunks sometimes. eg. f = g
-- gets compiled to a jump to g (if g has non-zero arity), instead of
-- messing around with update frames and PAPs. We set the closure type
-- to FUN_STATIC in this case.
-getClosureType :: Int -> Int -> Int -> LambdaFormInfo -> ClosureType
-getClosureType tot_wds ptrs nptrs lf_info =
- case lf_info of
- LFCon con True -> CONSTR_NOCAF
+getClosureType :: Bool -> Int -> Int -> LambdaFormInfo -> ClosureType
+getClosureType is_static tot_wds ptr_wds lf_info
+ = case lf_info of
+ LFCon con zero_arity
+ | is_static && ptr_wds == 0 -> CONSTR_NOCAF
+ | specialised_rep mAX_SPEC_CONSTR_SIZE -> CONSTR_p_n
+ | otherwise -> CONSTR
- LFCon con False
- | tot_wds > 0 && tot_wds <= mAX_SPEC_CONSTR_SIZE -> CONSTR_p_n ptrs nptrs
- | otherwise -> CONSTR
+ LFTuple _ zero_arity
+ | is_static && ptr_wds == 0 -> CONSTR_NOCAF
+ | specialised_rep mAX_SPEC_CONSTR_SIZE -> CONSTR_p_n
+ | otherwise -> CONSTR
LFReEntrant _ _ _ _ _ _
- | tot_wds > 0 && tot_wds <= mAX_SPEC_FUN_SIZE -> FUN_p_n ptrs nptrs
- | otherwise -> FUN
-
- LFTuple _ _
- | tot_wds > 0 && tot_wds <= mAX_SPEC_CONSTR_SIZE -> CONSTR_p_n ptrs nptrs
- | otherwise -> CONSTR
+ | specialised_rep mAX_SPEC_FUN_SIZE -> FUN_p_n
+ | otherwise -> FUN
LFThunk _ _ _ _ (SelectorThunk _) _ _ -> THUNK_SELECTOR
LFThunk _ _ _ _ _ _ _
- | tot_wds > 0 && tot_wds <= mAX_SPEC_THUNK_SIZE -> THUNK_p_n ptrs nptrs
- | otherwise -> THUNK
+ | specialised_rep mAX_SPEC_THUNK_SIZE -> THUNK_p_n
+ | otherwise -> THUNK
- _ -> panic "getClosureType"
+ _ -> panic "getClosureType"
+ where
+ specialised_rep max_size = not is_static
+ && tot_wds > 0
+ && tot_wds <= max_size
\end{code}
%************************************************************************
the result list
\begin{code}
-mkVirtHeapOffsets :: SMRep -- Representation to be used by storage manager
- -> (a -> PrimRep) -- To be able to grab kinds;
+mkVirtHeapOffsets ::
+ (a -> PrimRep) -- To be able to grab kinds;
-- w/ a kind, we can find boxedness
-> [a] -- Things to make offsets for
-> (Int, -- *Total* number of words allocated
-- First in list gets lowest offset, which is initial offset + 1.
-mkVirtHeapOffsets sm_rep kind_fun things
+mkVirtHeapOffsets kind_fun things
= let (ptrs, non_ptrs) = separateByPtrFollowness kind_fun things
(wds_of_ptrs, ptrs_w_offsets) = mapAccumL computeOffset 0 ptrs
(tot_wds, non_ptrs_w_offsets) = mapAccumL computeOffset wds_of_ptrs non_ptrs
= case lf_info of
LFReEntrant ty top arity no_fvs _ _ -> returnFC (
not no_fvs || -- Certainly if it has fvs we need to point to it
- case top of { TopLevel -> False; _ -> True }
+ isNotTopLevel top
-- If it is not top level we will point to it
-- We can have a \r closure with no_fvs which
-- is not top level as special case cgRhsClosure
LFThunk _ _ _ updatable std_form_info _ _
-> if updatable || opt_DoTickyProfiling -- to catch double entry
+ || opt_SMP -- always enter via node on SMP, since the
+ -- thunk might have been blackholed in the
+ -- meantime.
then ViaNode
else StdEntry (thunkEntryLabel name std_form_info updatable)
-- Single-entry ones have no fvs to plug, and we trust they don't form part
-- of a loop.
-blackHoleOnEntry (MkClosureInfo _ _ (StaticRep _ _ _)) = False
+blackHoleOnEntry (MkClosureInfo _ _ rep)
+ | isStaticRep rep
+ = False
+ -- Never black-hole a static closure
blackHoleOnEntry (MkClosureInfo _ lf_info _)
= case lf_info of
-> Bool
staticClosureRequired binder (StgBinderInfo arg_occ unsat_occ _ _ _)
(LFReEntrant _ top_level _ _ _ _) -- It's a function
- = ASSERT( case top_level of { TopLevel -> True; other -> False } )
+ = ASSERT( isTopLevel top_level )
-- Assumption: it's a top-level, no-free-var binding
arg_occ -- There's an argument occurrence
|| unsat_occ -- There's an unsaturated call
-> Bool
funInfoTableRequired binder (StgBinderInfo arg_occ unsat_occ _ _ _)
(LFReEntrant _ top_level _ _ _ _)
- = (case top_level of { NotTopLevel -> True; TopLevel -> False })
+ = isNotTopLevel top_level
|| arg_occ -- There's an argument occurrence
|| unsat_occ -- There's an unsaturated call
|| isExternallyVisibleName binder
mkConInfoPtr :: DataCon -> SMRep -> CLabel
mkConInfoPtr con rep
- = case rep of
- StaticRep _ _ _ -> mkStaticInfoTableLabel name
- _ -> mkConInfoTableLabel name
+ | isStaticRep rep = mkStaticInfoTableLabel name
+ | otherwise = mkConInfoTableLabel name
where
name = dataConName con
mkConEntryPtr :: DataCon -> SMRep -> CLabel
mkConEntryPtr con rep
- = case rep of
- StaticRep _ _ _ -> mkStaticConEntryLabel (dataConName con)
- _ -> mkConEntryLabel (dataConName con)
- where
- name = dataConName con
-
-closureLabelFromCI (MkClosureInfo name _ rep)
- | isConstantRep rep
- = mkStaticClosureLabel name
- -- This case catches those pesky static closures for nullary constructors
+ | isStaticRep rep = mkStaticConEntryLabel (dataConName con)
+ | otherwise = mkConEntryLabel (dataConName con)
closureLabelFromCI (MkClosureInfo id _ other_rep) = mkClosureLabel id
= getTyDescription ty
closureTypeDescr (MkClosureInfo name (LFReEntrant ty _ _ _ _ _) _)
= getTyDescription ty
+closureTypeDescr (MkClosureInfo name (LFCon data_con _) _)
+ = occNameUserString (getOccName (dataConTyCon data_con))
closureTypeDescr (MkClosureInfo name lf _)
= showSDoc (ppr name)
\end{code}
projects / ghc-hetmet.git / blobdiff