\section[Desugar]{@deSugar@: the main function}
\begin{code}
+module Desugar ( deSugar, pprDsWarnings ) where
+
#include "HsVersions.h"
-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 CmdLineOpts ( opt_D_dump_ds )
+import HsSyn ( MonoBinds )
+import TcHsSyn ( TypecheckedMonoBinds, TypecheckedForeignDecl )
+
import CoreSyn
-import Name ( isExported )
+import PprCore ( pprCoreBindings )
import DsMonad
-import DsBinds ( dsBinds, dsMonoBinds )
+import DsBinds ( dsMonoBinds )
+import DsForeign ( dsForeigns )
import DsUtils
-import Bag ( unionBags )
-import CmdLineOpts ( opt_DoCoreLinting, opt_AutoSccsOnAllToplevs,
- opt_AutoSccsOnExportedToplevs, opt_SccGroup
- )
-import CostCentre ( IsCafCC(..), mkAutoCC )
+import Bag ( isEmptyBag )
+import BasicTypes ( Module )
+import CmdLineOpts ( opt_SccGroup, opt_SccProfilingOn )
import CoreLift ( liftCoreBindings )
import CoreLint ( lintCoreBindings )
-import Id ( nullIdEnv, mkIdEnv, idType,
- SYN_IE(DictVar), GenId, SYN_IE(Id) )
-import PprStyle ( PprStyle(..) )
+import Id ( nullIdEnv, GenId, Id )
+import ErrUtils ( dumpIfSet, doIfSet )
+import Outputable
import UniqSupply ( splitUniqSupply, UniqSupply )
\end{code}
\begin{code}
deSugar :: UniqSupply -- name supply
- -> FAST_STRING -- module name
-
- -> (TypecheckedHsBinds, -- input: recsel, class, instance, and value
- TypecheckedHsBinds, -- bindings; see "tcModule" (which produces
- TypecheckedHsBinds, -- them)
- TypecheckedHsBinds,
- TypecheckedHsBinds)
--- ToDo: handling of const_inst thingies is certainly WRONG ***************************
-
- -> ([CoreBinding], -- output
- DsWarnings) -- Shadowing complaints
+ -> Module -- module name
+ -> TypecheckedMonoBinds
+ -> [TypecheckedForeignDecl]
+ -> IO ([CoreBinding], SDoc, SDoc, SDoc) -- output
-deSugar us mod_name (recsel_binds, clas_binds, inst_binds, val_binds, const_inst_binds)
+deSugar us mod_name all_binds fo_decls
= let
- (us0, us0a) = splitUniqSupply us
- (us1, us1a) = splitUniqSupply us0a
- (us2, us2a) = splitUniqSupply us1a
- (us3, us3a) = splitUniqSupply us2a
- (us4, us5) = splitUniqSupply us3a
+ (us1, us2) = splitUniqSupply us
+ (us3, us4) = splitUniqSupply us2
-
- module_and_group = (mod_name, grp_name)
+ 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 nullIdEnv mod_name (dsBinds clas_binds)
- core_clas_prs = pairsFromCoreBinds core_clas_binds
-
- (core_inst_binds, shadows3)
- = initDs us2 nullIdEnv mod_name (dsBinds inst_binds)
- core_inst_prs = pairsFromCoreBinds core_inst_binds
-
- (core_val_binds, shadows4)
- = initDs us3 nullIdEnv mod_name (dsBinds val_binds)
- core_val_pairs = map (addAutoScc module_and_group) (pairsFromCoreBinds core_val_binds)
+ (core_prs, ds_warns) = initDs us1 nullIdEnv module_and_group
+ (dsMonoBinds opt_SccProfilingOn all_binds [])
- (core_recsel_binds, shadows5)
- = initDs us4 nullIdEnv mod_name (dsBinds recsel_binds)
- core_recsel_prs = pairsFromCoreBinds core_recsel_binds
+ ((fi_binds, fe_binds, hc_code, h_code, c_code), ds_warns2) =
+ initDs us3 nullIdEnv module_and_group
+ (dsForeigns fo_decls)
- final_binds
- = if (null core_clas_prs && null core_inst_prs
- && null core_recsel_prs {-???dont know???-} && null core_const_prs) then
- -- we don't have to make the whole thing recursive
- core_clas_binds ++ core_val_binds
-
- else -- gotta make it recursive (sigh)
- [Rec (core_clas_prs ++ core_inst_prs
- ++ core_const_prs ++ core_val_pairs ++ core_recsel_prs)]
-
- lift_final_binds = liftCoreBindings us5 final_binds
-
- really_final_binds = if opt_DoCoreLinting
- then lintCoreBindings PprDebug "Desugarer" False lift_final_binds
- else lift_final_binds
-
- shadows = shadows1 `unionBags` shadows2 `unionBags`
- shadows3 `unionBags` shadows4 `unionBags` shadows5
+ ds_binds' = liftCoreBindings us4 [Rec (core_prs)]
+ ds_binds = fi_binds ++ ds_binds' ++ fe_binds
in
- (really_final_binds, shadows)
-\end{code}
+ -- Display any warnings
+ doIfSet (not (isEmptyBag ds_warns))
+ (printErrs (pprDsWarnings ds_warns)) >>
-%************************************************************************
-%* *
-\subsection[addAutoScc]{Adding automatic sccs}
-%* *
-%************************************************************************
+ -- Lint result if necessary
+ lintCoreBindings "Desugarer" False ds_binds >>
-\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
+ -- Dump output
+ dumpIfSet opt_D_dump_ds "Desugared:"
+ (pprCoreBindings ds_binds) >>
+
+ return (ds_binds, hc_code, h_code, c_code)
\end{code}
projects / ghc-hetmet.git / blobdiff