import HsSyn
import TcRnTypes
import MkIface
+import IfaceEnv
import Id
+import IOEnv
+import Pair
import Name
+import FastString
import CoreSyn
import CoreSubst
+import CoqPass ( coqPassCoreToString, coqPassCoreToCore )
import PprCore
import DsMonad
import DsExpr
import NameSet
import NameEnv
import Rules
-import CoreMonad ( endPass, CoreToDo(..) )
+import CoreMonad ( endPass, CoreToDo(..), CoreM, runCoreM, lookupOrigCoreM )
+import TyCon
import ErrUtils
import Outputable
import SrcLoc
import OrdList
import Data.List
import Data.IORef
+import PrelNames
+import UniqSupply
+import UniqFM
+import CoreFVs
+import Type
+import Coercion
\end{code}
%************************************************************************
%************************************************************************
\begin{code}
+
-- | Main entry point to the desugarer.
deSugar :: HscEnv -> ModLocation -> TcGblEnv -> IO (Messages, Maybe ModGuts)
-- Can modify PCS by faulting in more declarations
then addCoverageTicksToBinds dflags mod mod_loc
(typeEnvTyCons type_env) binds
else return (binds, hpcInfo, emptyModBreaks)
+
initDs hsc_env mod rdr_env type_env $ do
do { ds_ev_binds <- dsEvBinds ev_binds
; core_prs <- dsTopLHsBinds auto_scc binds_cvr
, foreign_prs `appOL` core_prs `appOL` spec_prs
, spec_rules ++ ds_rules, ds_vects
, ds_fords `appendStubC` hpc_init
- , ds_hpc_info, modBreaks) }
+ , ds_hpc_info, modBreaks)
+ }
; case mb_res of {
Nothing -> return (msgs, Nothing) ;
final_prs = addExportFlagsAndRules target
export_set keep_alive rules_for_locals (fromOL all_prs)
- final_pgm = combineEvBinds ds_ev_binds final_prs
+ final_pgm = let comb = combineEvBinds ds_ev_binds final_prs
+ in if dopt Opt_F_simpleopt_before_flatten dflags
+ then comb
+ else simplifyBinds comb
-- Notice that we put the whole lot in a big Rec, even the foreign binds
-- When compiling PrelFloat, which defines data Float = F# Float#
-- we want F# to be in scope in the foreign marshalling code!
-- You might think it doesn't matter, but the simplifier brings all top-level
-- things into the in-scope set before simplifying; so we get no unfolding for F#!
- -- Lint result if necessary, and print
- ; dumpIfSet_dyn dflags Opt_D_dump_ds "Desugared, before opt" $
- (vcat [ pprCoreBindings final_pgm
- , pprRules rules_for_imps ])
-
- ; (ds_binds, ds_rules_for_imps, ds_vects)
- <- simpleOptPgm dflags final_pgm rules_for_imps vects0
+ ; (final_pgm1, rules_for_imps1, ds_vects1) <- if dopt Opt_F_simpleopt_before_flatten dflags
+ then simpleOptPgm dflags final_pgm rules_for_imps vects0
+ else return (final_pgm, rules_for_imps, vects0)
+
+ ; ds_binds1 <- if dopt Opt_F_coqpass dflags
+ then do { us1 <- mkSplitUniqSupply '*' -- hack
+ ; us2 <- mkSplitUniqSupply '~' -- hack
+ ; let do_flatten = dopt Opt_F_flatten dflags
+ ; let do_skolemize = dopt Opt_F_skolemize dflags
+ ; let mon = runCoreM hsc_env (mkRuleBase rules_for_imps1) us1 mod
+ $ coqPassCoreToCore do_flatten do_skolemize dsLookupVar dsLookupTyc us2 final_pgm1
+ where
+ dsLookupVar :: String -> String -> CoreM Var
+ dsLookupVar modname varname
+ = do { name <- lookupOrigCoreM
+ (mkBaseModule (fsLit modname))
+ (mkOccNameFS varName (fsLit varname))
+ ; lookupId name
+ }
+ dsLookupTyc :: String -> String -> CoreM TyCon
+ dsLookupTyc modname tycname
+ = do { name <- lookupOrigCoreM
+ (mkBaseModule (fsLit modname))
+ (mkOccNameFS tcName (fsLit tycname))
+ ; lookupTyCon name
+ }
+ ; (ret,_) <- mon
+ ; return ret
+ }
+ else return final_pgm
+
+ ; (ds_binds2, ds_rules_for_imps2, ds_vects2) <- if dopt Opt_F_simpleopt_before_flatten dflags
+ then return (ds_binds1, rules_for_imps1, ds_vects1)
+ else simpleOptPgm dflags ds_binds1 rules_for_imps1 ds_vects1
+ -- The simpleOptPgm gets rid of type
+ -- bindings plus any stupid dead code
+
+ ; dumpIfSet_dyn dflags Opt_D_dump_proofs "Coq Pass Output" $ text $ coqPassCoreToString ds_binds1
+
+ ; dumpIfSet_dyn dflags Opt_D_coqpass "After Coq Pass" (text $ showSDoc $ pprCoreBindings ds_binds1)
+
+ ; (ds_binds3, ds_rules_for_imps3, ds_vects3)
+ <- simpleOptPgm dflags ds_binds2 ds_rules_for_imps2 ds_vects2
-- The simpleOptPgm gets rid of type
-- bindings plus any stupid dead code
- ; endPass dflags CoreDesugar ds_binds ds_rules_for_imps
+ ; endPass dflags CoreDesugar ds_binds3 ds_rules_for_imps3
; let used_names = mkUsedNames tcg_env
; deps <- mkDependencies tcg_env
mg_fam_insts = fam_insts,
mg_inst_env = inst_env,
mg_fam_inst_env = fam_inst_env,
- mg_rules = ds_rules_for_imps,
- mg_binds = ds_binds,
+ mg_rules = ds_rules_for_imps3,
+ mg_binds = ds_binds3,
mg_foreign = ds_fords,
mg_hpc_info = ds_hpc_info,
mg_modBreaks = modBreaks,
- mg_vect_decls = ds_vects,
+ mg_vect_decls = ds_vects2,
mg_vect_info = noVectInfo
}
; return (msgs, Just mod_guts)
do { rhs' <- fmapMaybeM dsLExpr rhs
; return $ Vect v rhs'
}
-dsVect (L loc (HsNoVect (L _ v)))
+dsVect (L _loc (HsNoVect (L _ v)))
= return $ NoVect v
\end{code}
+
+
+
+\begin{code}
+--
+-- Simplification routines run before the flattener. We can't use
+-- simpleOptPgm -- it doesn't preserve the order of subexpressions or
+-- let-binding groups.
+--
+simplify :: Expr CoreBndr -> Expr CoreBndr
+simplify (Var v) = Var v
+simplify (App e1 e2) = App (simplify e1) (simplify e2)
+simplify (Lit lit) = Lit lit
+simplify (Note note e) = Note note (simplify e)
+simplify (Cast e co) = if eqType (fst $ unPair $ coercionKind co) (snd $ unPair $ coercionKind co)
+ then simplify e
+ else Cast (simplify e) co
+simplify (Lam v e) = Lam v (simplify e)
+simplify (Case e b ty as) = Case (simplify e) b ty (map (\(a,b,e) -> (a,b,simplify e)) as)
+simplify (Let bind body) = foldr Let (simplify body) (simplifyBind bind)
+simplify (Type t) = Type t
+simplify (Coercion co) = Coercion co
+
+simplifyBind :: Bind CoreBndr -> [Bind CoreBndr]
+simplifyBind (NonRec b e) = [NonRec b (simplify e)]
+simplifyBind (Rec []) = []
+simplifyBind (Rec (rbs@((b,e):rbs'))) =
+ if or $ map (\x -> elemUFM x (exprFreeIds e)) (map fst rbs)
+ then [Rec (map (\(v,e) -> (v,simplify e)) rbs)]
+ else (NonRec b (simplify e)):(simplifyBind $ Rec rbs')
+
+simplifyBinds = concatMap simplifyBind
+\end{code}
projects / ghc-hetmet.git / blobdiff