X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FdeSugar%2FDesugar.lhs;h=1ba877ae1cf821b2161bbbcc79225cb1a493e3a9;hp=4e67111cc33877a4ad8812e5e4c4dfde01725e10;hb=da9d10064c084fed395e6030b1cb82bee2b140ed;hpb=4c1f0681d85da48deaf706c0f05d971deb48261f diff --git a/compiler/deSugar/Desugar.lhs b/compiler/deSugar/Desugar.lhs index 4e67111..1ba877a 100644 --- a/compiler/deSugar/Desugar.lhs +++ b/compiler/deSugar/Desugar.lhs @@ -15,6 +15,7 @@ import HsSyn import TcRnTypes import MkIface import Id +import Pair import Name import CoreSyn import CoreSubst @@ -43,6 +44,10 @@ import Data.List import Data.IORef import PrelNames import UniqSupply +import UniqFM +import CoreFVs +import Type +import Coercion \end{code} %************************************************************************ @@ -52,6 +57,7 @@ import UniqSupply %************************************************************************ \begin{code} + -- | Main entry point to the desugarer. deSugar :: HscEnv -> ModLocation -> TcGblEnv -> IO (Messages, Maybe ModGuts) -- Can modify PCS by faulting in more declarations @@ -113,6 +119,12 @@ deSugar hsc_env , undefined , undefined , undefined + , undefined + , undefined + , undefined + , undefined + , undefined + , undefined )) _ -> do (binds_cvr,ds_hpc_info, modBreaks) @@ -132,8 +144,12 @@ deSugar hsc_env ; hetmet_brak <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_brak_name else return undefined ; hetmet_esc <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_esc_name else return undefined ; hetmet_flatten <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_flatten_name else return undefined + ; hetmet_unflatten <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_unflatten_name else return undefined ; hetmet_flattened_id <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_flattened_id_name else return undefined ; hetmet_PGArrow <- if dopt Opt_F_coqpass dflags then dsLookupTyCon hetmet_PGArrow_name else return undefined + ; hetmet_PGArrow_unit <- if dopt Opt_F_coqpass dflags then dsLookupTyCon hetmet_PGArrow_unit_name else return undefined + ; hetmet_PGArrow_tensor <- if dopt Opt_F_coqpass dflags then dsLookupTyCon hetmet_PGArrow_tensor_name else return undefined + ; hetmet_PGArrow_exponent <- if dopt Opt_F_coqpass dflags then dsLookupTyCon hetmet_PGArrow_exponent_name else return undefined ; hetmet_pga_id <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_pga_id_name else return undefined ; hetmet_pga_comp <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_pga_comp_name else return undefined ; hetmet_pga_first <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_pga_first_name else return undefined @@ -151,6 +167,8 @@ deSugar hsc_env ; hetmet_pga_applyr <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_pga_applyr_name else return undefined ; hetmet_pga_curryl <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_pga_curryl_name else return undefined ; hetmet_pga_curryr <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_pga_curryr_name else return undefined + ; hetmet_pga_loopl <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_pga_loopl_name else return undefined + ; hetmet_pga_loopr <- if dopt Opt_F_coqpass dflags then dsLookupGlobalId hetmet_pga_loopr_name else return undefined ; let hpc_init | opt_Hpc = hpcInitCode mod ds_hpc_info | otherwise = empty @@ -158,8 +176,14 @@ deSugar hsc_env , foreign_prs `appOL` core_prs `appOL` spec_prs , spec_rules ++ ds_rules, ds_vects , ds_fords `appendStubC` hpc_init - , ds_hpc_info, modBreaks, hetmet_brak, hetmet_esc, hetmet_flatten, hetmet_flattened_id + , ds_hpc_info, modBreaks, hetmet_brak, hetmet_esc + , hetmet_flatten + , hetmet_unflatten + , hetmet_flattened_id , hetmet_PGArrow + , hetmet_PGArrow_unit + , hetmet_PGArrow_tensor + , hetmet_PGArrow_exponent , hetmet_pga_id , hetmet_pga_comp , hetmet_pga_first @@ -177,13 +201,21 @@ deSugar hsc_env , hetmet_pga_applyr , hetmet_pga_curryl , hetmet_pga_curryr + , hetmet_pga_loopl + , hetmet_pga_loopr ) } ; case mb_res of { Nothing -> return (msgs, Nothing) ; - Just (ds_ev_binds, all_prs, all_rules, ds_vects, ds_fords,ds_hpc_info, modBreaks - , hetmet_brak, hetmet_esc, hetmet_flatten, hetmet_flattened_id + Just (ds_ev_binds, all_prs, all_rules, vects0, ds_fords, ds_hpc_info, modBreaks + , hetmet_brak, hetmet_esc + , hetmet_flatten + , hetmet_unflatten + , hetmet_flattened_id , hetmet_PGArrow + , hetmet_PGArrow_unit + , hetmet_PGArrow_tensor + , hetmet_PGArrow_exponent , hetmet_pga_id , hetmet_pga_comp , hetmet_pga_first @@ -200,41 +232,50 @@ deSugar hsc_env , hetmet_pga_applyl , hetmet_pga_applyr , hetmet_pga_curryl - , hetmet_pga_curryr) -> do + , hetmet_pga_curryr + , hetmet_pga_loopl + , hetmet_pga_loopr + ) -> do - { -- Add export flags to bindings - keep_alive <- readIORef keep_var - ; let (rules_for_locals, rules_for_imps) + { -- Add export flags to bindings + keep_alive <- readIORef keep_var + ; let (rules_for_locals, rules_for_imps) = partition isLocalRule all_rules final_prs = addExportFlagsAndRules target - export_set keep_alive rules_for_locals (fromOL all_prs) - - final_pgm = combineEvBinds ds_ev_binds final_prs - -- 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) <- simpleOptPgm dflags final_pgm rules_for_imps - -- The simpleOptPgm gets rid of type - -- bindings plus any stupid dead code - - ; ds_binds' <- if dopt Opt_F_coqpass dflags + export_set keep_alive rules_for_locals (fromOL all_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#! + + ; (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 { us <- mkSplitUniqSupply '~' + ; let do_flatten = dopt Opt_F_flatten dflags + ; let do_skolemize = dopt Opt_F_skolemize dflags ; return (coqPassCoreToCore + do_flatten + do_skolemize hetmet_brak hetmet_esc hetmet_flatten + hetmet_unflatten hetmet_flattened_id us - ds_binds + final_pgm1 hetmet_PGArrow + hetmet_PGArrow_unit + hetmet_PGArrow_tensor + hetmet_PGArrow_exponent hetmet_pga_id hetmet_pga_comp hetmet_pga_first @@ -251,18 +292,32 @@ deSugar hsc_env hetmet_pga_applyl hetmet_pga_applyr hetmet_pga_curryl - hetmet_pga_curryr) + hetmet_pga_curryr + hetmet_pga_loopl + hetmet_pga_loopr + ) } - else return ds_binds + 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 "Coq Pass Output" $ text $ coqPassCoreToString ds_binds' + ; dumpIfSet_dyn dflags Opt_D_coqpass "After Coq Pass" (text $ showSDoc $ pprCoreBindings ds_binds1) - ; dumpIfSet_dyn dflags Opt_D_dump_coqpass "After Coq Pass" (text $ showSDoc $ pprCoreBindings ds_binds') + ; (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 + ; deps <- mkDependencies tcg_env ; let mod_guts = ModGuts { mg_module = mod, @@ -280,12 +335,12 @@ deSugar hsc_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) @@ -496,6 +551,8 @@ switching off EnableRewriteRules. See DsExpr.dsExplicitList. That keeps the desugaring of list comprehensions simple too. + + Nor do we want to warn of conversion identities on the LHS; the rule is precisly to optimise them: {-# RULES "fromRational/id" fromRational = id :: Rational -> Rational #-} @@ -509,16 +566,44 @@ the rule is precisly to optimise them: \begin{code} dsVect :: LVectDecl Id -> DsM CoreVect -dsVect (L loc (HsVect v rhs)) +dsVect (L loc (HsVect (L _ v) rhs)) = putSrcSpanDs loc $ do { rhs' <- fmapMaybeM dsLExpr rhs - ; return $ Vect (unLoc v) rhs' + ; return $ Vect v rhs' } --- dsVect (L loc (HsVect v Nothing)) --- = return $ Vect v Nothing --- dsVect (L loc (HsVect v (Just rhs))) --- = putSrcSpanDs loc $ --- do { rhs' <- dsLExpr rhs --- ; return $ Vect v (Just rhs') --- } +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}