\begin{code}
#include "HsVersions.h"
-module Desugar ( deSugar, DsMatchContext, pprDsWarnings ) where
-
-import Ubiq{-uitous-}
-
-import HsSyn ( HsBinds, HsExpr )
-import TcHsSyn ( TypecheckedHsBinds(..), TypecheckedHsExpr(..) )
+module Desugar ( deSugar, pprDsWarnings
+#if __GLASGOW_HASKELL__ < 200
+ , DsMatchContext
+ , DsWarnFlavour -- fluff needed for closure,
+ -- removed when compiling with 1.4
+#endif
+ ) where
+
+IMP_Ubiq(){-uitous-}
+
+import HsSyn ( HsBinds, HsExpr, MonoBinds,
+ SYN_IE(RecFlag), nonRecursive
+ )
+import TcHsSyn ( SYN_IE(TypecheckedHsBinds), SYN_IE(TypecheckedHsExpr)
+ )
import CoreSyn
-
+import Name ( isExported )
import DsMonad
-import DsBinds ( dsBinds, dsInstBinds )
+import DsBinds ( dsBinds, dsMonoBinds )
import DsUtils
import Bag ( unionBags )
-import CmdLineOpts ( opt_DoCoreLinting )
+import CmdLineOpts ( opt_DoCoreLinting, opt_AutoSccsOnAllToplevs,
+ opt_AutoSccsOnExportedToplevs, opt_SccGroup
+ )
+import CostCentre ( IsCafCC(..), mkAutoCC )
import CoreLift ( liftCoreBindings )
import CoreLint ( lintCoreBindings )
-import Id ( nullIdEnv, mkIdEnv )
+import Id ( nullIdEnv, mkIdEnv, idType,
+ SYN_IE(DictVar), GenId, SYN_IE(Id) )
import PprStyle ( PprStyle(..) )
-import UniqSupply ( splitUniqSupply )
+import UniqSupply ( splitUniqSupply, UniqSupply )
\end{code}
The only trick here is to get the @DsMonad@ stuff off to a good
TypecheckedHsBinds, -- bindings; see "tcModule" (which produces
TypecheckedHsBinds, -- them)
TypecheckedHsBinds,
- [(Id, TypecheckedHsExpr)])
+ TypecheckedHsBinds)
-- ToDo: handling of const_inst thingies is certainly WRONG ***************************
-> ([CoreBinding], -- output
- Bag DsMatchContext) -- Shadowing complaints
+ DsWarnings) -- Shadowing complaints
-deSugar us mod_name (recsel_binds, clas_binds, inst_binds, val_binds, const_inst_pairs)
+deSugar us mod_name (recsel_binds, clas_binds, inst_binds, val_binds, const_inst_binds)
= let
(us0, us0a) = splitUniqSupply us
(us1, us1a) = splitUniqSupply us0a
(us3, us3a) = splitUniqSupply us2a
(us4, us5) = splitUniqSupply us3a
- ((core_const_prs, consts_pairs), shadows1)
- = initDs us0 nullIdEnv mod_name (dsInstBinds [] const_inst_pairs)
- consts_env = mkIdEnv consts_pairs
+ module_and_group = (mod_name, grp_name)
+ grp_name = case opt_SccGroup of
+ Just xx -> _PK_ xx
+ Nothing -> mod_name -- default: module name
+
+ (core_const_binds, shadows1)
+ = initDs us0 nullIdEnv mod_name (dsBinds const_inst_binds)
+ core_const_prs = pairsFromCoreBinds core_const_binds
(core_clas_binds, shadows2)
- = initDs us1 consts_env mod_name (dsBinds clas_binds)
+ = initDs us1 nullIdEnv mod_name (dsBinds clas_binds)
core_clas_prs = pairsFromCoreBinds core_clas_binds
(core_inst_binds, shadows3)
- = initDs us2 consts_env mod_name (dsBinds inst_binds)
+ = initDs us2 nullIdEnv mod_name (dsBinds inst_binds)
core_inst_prs = pairsFromCoreBinds core_inst_binds
(core_val_binds, shadows4)
- = initDs us3 consts_env mod_name (dsBinds val_binds)
- core_val_pairs = pairsFromCoreBinds core_val_binds
+ = initDs us3 nullIdEnv mod_name (dsBinds val_binds)
+ core_val_pairs = map (addAutoScc module_and_group) (pairsFromCoreBinds core_val_binds)
(core_recsel_binds, shadows5)
- = initDs us4 consts_env mod_name (dsBinds recsel_binds)
+ = initDs us4 nullIdEnv mod_name (dsBinds recsel_binds)
core_recsel_prs = pairsFromCoreBinds core_recsel_binds
final_binds
in
(really_final_binds, shadows)
\end{code}
+
+
+%************************************************************************
+%* *
+\subsection[addAutoScc]{Adding automatic sccs}
+%* *
+%************************************************************************
+
+\begin{code}
+addAutoScc :: (FAST_STRING, FAST_STRING) -- Module and group
+ -> (Id, CoreExpr)
+ -> (Id,CoreExpr)
+
+addAutoScc (mod, grp) pair@(bndr, core_expr)
+ | worthSCC core_expr &&
+ (opt_AutoSccsOnAllToplevs ||
+ (isExported bndr && opt_AutoSccsOnExportedToplevs))
+ = (bndr, SCC (mkAutoCC bndr mod grp IsNotCafCC) core_expr)
+
+ | otherwise
+ = pair
+
+worthSCC (SCC _ _) = False
+worthSCC (Con _ _) = False
+worthSCC core_expr = True
+\end{code}