X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fmain%2FTidyPgm.lhs;h=dec5c6b0d3ed5b46d8120b588d3b029cb2fd2808;hp=86e55f9e0654c891e702223398c8554cbdd5d274;hb=17b297d97d327620ed6bfab942f8992b2446f1bf;hpb=0065d5ab628975892cea1ec7303f968c3338cbe1 diff --git a/compiler/main/TidyPgm.lhs b/compiler/main/TidyPgm.lhs index 86e55f9..dec5c6b 100644 --- a/compiler/main/TidyPgm.lhs +++ b/compiler/main/TidyPgm.lhs @@ -4,12 +4,18 @@ \section{Tidying up Core} \begin{code} +{-# OPTIONS_GHC -w #-} +-- The above warning supression flag is a temporary kludge. +-- While working on this module you are encouraged to remove it and fix +-- any warnings in the module. See +-- http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings +-- for details + module TidyPgm( mkBootModDetails, tidyProgram ) where #include "HsVersions.h" -import DynFlags ( DynFlag(..), dopt ) -import Packages ( HomeModules ) +import DynFlags ( DynFlag(..), DynFlags(..), dopt ) import CoreSyn import CoreUnfold ( noUnfolding, mkTopUnfolding ) import CoreFVs ( ruleLhsFreeIds, exprSomeFreeVars ) @@ -22,16 +28,14 @@ import VarSet import Var ( Id, Var ) import Id ( idType, idInfo, idName, idCoreRules, isGlobalId, isExportedId, mkVanillaGlobal, isLocalId, isNaughtyRecordSelector, - idArity, idCafInfo, idUnfolding, isImplicitId, setIdInfo + idArity, idCafInfo, idUnfolding, isImplicitId, setIdInfo, + isTickBoxOp ) import IdInfo {- loads of stuff -} import InstEnv ( Instance, DFunId, instanceDFunId, setInstanceDFunId ) import NewDemand ( isBottomingSig, topSig ) -import BasicTypes ( Arity, isNeverActive ) -import Name ( Name, getOccName, nameOccName, mkInternalName, - localiseName, isExternalName, nameSrcLoc, nameParent_maybe, - isWiredInName, getName - ) +import BasicTypes ( Arity, isNeverActive, isNonRuleLoopBreaker ) +import Name import NameSet ( NameSet, elemNameSet ) import IfaceEnv ( allocateGlobalBinder ) import NameEnv ( filterNameEnv, mapNameEnv ) @@ -40,22 +44,21 @@ import Type ( tidyTopType ) import TcType ( isFFITy ) import DataCon ( dataConName, dataConFieldLabels, dataConWrapId_maybe ) import TyCon ( TyCon, makeTyConAbstract, tyConDataCons, isNewTyCon, - newTyConRep, tyConSelIds, isAlgTyCon, isEnumerationTyCon ) + newTyConRep, tyConSelIds, isAlgTyCon, + isEnumerationTyCon, isOpenTyCon ) import Class ( classSelIds ) import Module ( Module ) -import HscTypes ( HscEnv(..), NameCache( nsUniqs ), CgGuts(..), - TypeEnv, typeEnvIds, typeEnvElts, typeEnvTyCons, - extendTypeEnvWithIds, lookupTypeEnv, - ModGuts(..), TyThing(..), ModDetails(..), Dependencies(..) - ) +import HscTypes import Maybes ( orElse, mapCatMaybes ) import ErrUtils ( showPass, dumpIfSet_core ) +import PackageConfig ( PackageId ) import UniqSupply ( splitUniqSupply, uniqFromSupply ) -import List ( partition ) -import Maybe ( isJust ) import Outputable -import DATA_IOREF ( IORef, readIORef, writeIORef ) import FastTypes hiding ( fastOr ) + +import Data.List ( partition ) +import Data.Maybe ( isJust ) +import Data.IORef ( IORef, readIORef, writeIORef ) \end{code} @@ -121,23 +124,30 @@ mkBootModDetails :: HscEnv -> ModGuts -> IO ModDetails -- We don't look at the bindings at all -- there aren't any -- for hs-boot files -mkBootModDetails hsc_env (ModGuts { mg_module = mod, - mg_exports = exports, - mg_types = type_env, - mg_insts = ispecs }) +mkBootModDetails hsc_env (ModGuts { mg_module = mod + , mg_exports = exports + , mg_types = type_env + , mg_insts = insts + , mg_fam_insts = fam_insts + , mg_modBreaks = modBreaks + }) = do { let dflags = hsc_dflags hsc_env ; showPass dflags "Tidy [hoot] type env" - ; let { ispecs' = tidyInstances tidyExternalId ispecs - ; type_env1 = filterNameEnv (not . isWiredInThing) type_env - ; type_env2 = mapNameEnv tidyBootThing type_env1 - ; type_env' = extendTypeEnvWithIds type_env2 - (map instanceDFunId ispecs') + ; let { insts' = tidyInstances tidyExternalId insts + ; type_env1 = filterNameEnv (not . isWiredInThing) type_env + ; type_env2 = mapNameEnv tidyBootThing type_env1 + ; type_env' = extendTypeEnvWithIds type_env2 + (map instanceDFunId insts') } - ; return (ModDetails { md_types = type_env', - md_insts = ispecs', - md_rules = [], - md_exports = exports }) + ; return (ModDetails { md_types = type_env' + , md_insts = insts' + , md_fam_insts = fam_insts + , md_rules = [] + , md_exports = exports + , md_modBreaks = modBreaks + , md_vect_info = noVectInfo + }) } where @@ -234,12 +244,15 @@ RHSs, so that they print nicely in interfaces. tidyProgram :: HscEnv -> ModGuts -> IO (CgGuts, ModDetails) tidyProgram hsc_env mod_impl@(ModGuts { mg_module = mod, mg_exports = exports, - mg_types = type_env, mg_insts = insts_tc, + mg_types = type_env, + mg_insts = insts, mg_fam_insts = fam_insts, mg_binds = binds, mg_rules = imp_rules, + mg_vect_info = vect_info, mg_dir_imps = dir_imps, mg_deps = deps, - mg_home_mods = home_mods, - mg_foreign = foreign_stubs }) + mg_foreign = foreign_stubs, + mg_hpc_info = hpc_info, + mg_modBreaks = modBreaks }) = do { let dflags = hsc_dflags hsc_env ; showPass dflags "Tidy Core" @@ -257,40 +270,50 @@ tidyProgram hsc_env -- (It's a sort of mutual recursion.) } - ; (tidy_env, tidy_binds) <- tidyTopBinds hsc_env home_mods mod type_env ext_ids binds + ; (tidy_env, tidy_binds) <- tidyTopBinds hsc_env mod type_env ext_ids + binds - ; let { tidy_type_env = tidyTypeEnv omit_prags exports type_env tidy_binds - ; tidy_ispecs = tidyInstances (lookup_dfun tidy_type_env) insts_tc + ; let { export_set = availsToNameSet exports + ; tidy_type_env = tidyTypeEnv omit_prags export_set type_env + tidy_binds + ; tidy_insts = tidyInstances (lookup_dfun tidy_type_env) insts -- A DFunId will have a binding in tidy_binds, and so -- will now be in final_env, replete with IdInfo -- Its name will be unchanged since it was born, but - -- we want Global, IdInfo-rich (or not) DFunId in the tidy_ispecs + -- we want Global, IdInfo-rich (or not) DFunId in the + -- tidy_insts ; tidy_rules = tidyRules tidy_env ext_rules -- You might worry that the tidy_env contains IdInfo-rich stuff - -- and indeed it does, but if omit_prags is on, ext_rules is empty + -- and indeed it does, but if omit_prags is on, ext_rules is + -- empty ; implicit_binds = getImplicitBinds type_env + ; all_tidy_binds = implicit_binds ++ tidy_binds ; alg_tycons = filter isAlgTyCon (typeEnvTyCons type_env) } - ; endPass dflags "Tidy Core" Opt_D_dump_simpl tidy_binds + ; endPass dflags "Tidy Core" Opt_D_dump_simpl all_tidy_binds ; dumpIfSet_core dflags Opt_D_dump_simpl "Tidy Core Rules" (pprRules tidy_rules) ; return (CgGuts { cg_module = mod, cg_tycons = alg_tycons, - cg_binds = implicit_binds ++ tidy_binds, + cg_binds = all_tidy_binds, cg_dir_imps = dir_imps, cg_foreign = foreign_stubs, - cg_home_mods = home_mods, - cg_dep_pkgs = dep_pkgs deps }, - - ModDetails { md_types = tidy_type_env, - md_rules = tidy_rules, - md_insts = tidy_ispecs, - md_exports = exports }) + cg_dep_pkgs = dep_pkgs deps, + cg_hpc_info = hpc_info }, + + ModDetails { md_types = tidy_type_env, + md_rules = tidy_rules, + md_insts = tidy_insts, + md_fam_insts = fam_insts, + md_exports = exports, + md_modBreaks = modBreaks, + md_vect_info = vect_info -- is already tidy + }) } lookup_dfun type_env dfun_id @@ -352,6 +375,8 @@ mustExposeTyCon exports tc | isEnumerationTyCon tc -- For an enumeration, exposing the constructors = True -- won't lead to the need for further exposure -- (This includes data types with no constructors.) + | isOpenTyCon tc -- open type family + = True | otherwise -- Newtype, datatype = any exported_con (tyConDataCons tc) -- Expose rep if any datacon or field is exported @@ -444,9 +469,10 @@ addExternal (id,rhs) needed = extendVarEnv (foldVarSet add_occ needed new_needed_ids) id show_unfold where - add_occ id needed = extendVarEnv needed id False + add_occ id needed | id `elemVarEnv` needed = needed + | otherwise = extendVarEnv needed id False -- "False" because we don't know we need the Id's unfolding - -- We'll override it later when we find the binding site + -- Don't override existing bindings; we might have already set it to True new_needed_ids = worker_ids `unionVarSet` unfold_ids `unionVarSet` @@ -454,7 +480,7 @@ addExternal (id,rhs) needed idinfo = idInfo id dont_inline = isNeverActive (inlinePragInfo idinfo) - loop_breaker = isLoopBreaker (occInfo idinfo) + loop_breaker = isNonRuleLoopBreaker (occInfo idinfo) bottoming_fn = isBottomingSig (newStrictnessInfo idinfo `orElse` topSig) spec_ids = specInfoFreeVars (specInfo idinfo) worker_info = workerInfo idinfo @@ -534,7 +560,6 @@ findExternalRules binds non_local_rules ext_ids -- * subst_env: A Var->Var mapping that substitutes the new Var for the old tidyTopBinds :: HscEnv - -> HomeModules -> Module -> TypeEnv -> IdEnv Bool -- Domain = Ids that should be external @@ -542,7 +567,7 @@ tidyTopBinds :: HscEnv -> [CoreBind] -> IO (TidyEnv, [CoreBind]) -tidyTopBinds hsc_env hmods mod type_env ext_ids binds +tidyTopBinds hsc_env mod type_env ext_ids binds = tidy init_env binds where nc_var = hsc_NC hsc_env @@ -566,13 +591,15 @@ tidyTopBinds hsc_env hmods mod type_env ext_ids binds -- since their names are "taken". -- The type environment is a convenient source of such things. + this_pkg = thisPackage (hsc_dflags hsc_env) + tidy env [] = return (env, []) - tidy env (b:bs) = do { (env1, b') <- tidyTopBind hmods mod nc_var ext_ids env b + tidy env (b:bs) = do { (env1, b') <- tidyTopBind this_pkg mod nc_var ext_ids env b ; (env2, bs') <- tidy env1 bs ; return (env2, b':bs') } ------------------------ -tidyTopBind :: HomeModules +tidyTopBind :: PackageId -> Module -> IORef NameCache -- For allocating new unique names -> IdEnv Bool -- Domain = Ids that should be external @@ -580,16 +607,16 @@ tidyTopBind :: HomeModules -> TidyEnv -> CoreBind -> IO (TidyEnv, CoreBind) -tidyTopBind hmods mod nc_var ext_ids tidy_env1@(occ_env1,subst1) (NonRec bndr rhs) +tidyTopBind this_pkg mod nc_var ext_ids tidy_env1@(occ_env1,subst1) (NonRec bndr rhs) = do { (occ_env2, name') <- tidyTopName mod nc_var ext_ids occ_env1 bndr ; let { (bndr', rhs') = tidyTopPair ext_ids tidy_env2 caf_info name' (bndr, rhs) ; subst2 = extendVarEnv subst1 bndr bndr' ; tidy_env2 = (occ_env2, subst2) } ; return (tidy_env2, NonRec bndr' rhs') } where - caf_info = hasCafRefs hmods subst1 (idArity bndr) rhs + caf_info = hasCafRefs this_pkg subst1 (idArity bndr) rhs -tidyTopBind hmods mod nc_var ext_ids tidy_env1@(occ_env1,subst1) (Rec prs) +tidyTopBind this_pkg mod nc_var ext_ids tidy_env1@(occ_env1,subst1) (Rec prs) = do { (occ_env2, names') <- tidyTopNames mod nc_var ext_ids occ_env1 bndrs ; let { prs' = zipWith (tidyTopPair ext_ids tidy_env2 caf_info) names' prs @@ -602,7 +629,7 @@ tidyTopBind hmods mod nc_var ext_ids tidy_env1@(occ_env1,subst1) (Rec prs) -- the CafInfo for a recursive group says whether *any* rhs in -- the group may refer indirectly to a CAF (because then, they all do). caf_info - | or [ mayHaveCafRefs (hasCafRefs hmods subst1 (idArity bndr) rhs) + | or [ mayHaveCafRefs (hasCafRefs this_pkg subst1 (idArity bndr) rhs) | (bndr,rhs) <- prs ] = MayHaveCafRefs | otherwise = NoCafRefs @@ -651,8 +678,7 @@ tidyTopName mod nc_var ext_ids occ_env id global = isExternalName name local = not global internal = not external - mb_parent = nameParent_maybe name - loc = nameSrcLoc name + loc = nameSrcSpan name (occ_env', occ') = tidyOccName occ_env (nameOccName name) @@ -661,7 +687,7 @@ tidyTopName mod nc_var ext_ids occ_env id (us1, us2) = splitUniqSupply (nsUniqs nc) uniq = uniqFromSupply us1 - mk_new_external nc = allocateGlobalBinder nc mod occ' mb_parent loc + mk_new_external nc = allocateGlobalBinder nc mod occ' loc -- If we want to externalise a currently-local name, check -- whether we have already assigned a unique for it. -- If so, use it; if not, extend the table. @@ -778,13 +804,15 @@ it as a CAF. In these cases however, we would need to use an additional CAF list to keep track of non-collectable CAFs. \begin{code} -hasCafRefs :: HomeModules -> VarEnv Var -> Arity -> CoreExpr -> CafInfo -hasCafRefs hmods p arity expr - | is_caf || mentions_cafs = MayHaveCafRefs +hasCafRefs :: PackageId -> VarEnv Var -> Arity -> CoreExpr -> CafInfo +hasCafRefs this_pkg p arity expr + | is_caf || mentions_cafs + = MayHaveCafRefs | otherwise = NoCafRefs where mentions_cafs = isFastTrue (cafRefs p expr) - is_caf = not (arity > 0 || rhsIsStatic hmods expr) + is_caf = not (arity > 0 || rhsIsStatic this_pkg expr) + -- NB. we pass in the arity of the expression, which is expected -- to be calculated by exprArity. This is because exprArity -- knows how much eta expansion is going to be done by @@ -806,6 +834,7 @@ cafRefs p (Lam x e) = cafRefs p e cafRefs p (Let b e) = fastOr (cafRefss p (rhssOfBind b)) (cafRefs p) e cafRefs p (Case e bndr _ alts) = fastOr (cafRefs p e) (cafRefss p) (rhssOfAlts alts) cafRefs p (Note n e) = cafRefs p e +cafRefs p (Cast e co) = cafRefs p e cafRefs p (Type t) = fastBool False cafRefss p [] = fastBool False