\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 )
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 )
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}
-- 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
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"
-- (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
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
| 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
= 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`
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
-- * 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
-> [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
-- 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
-> 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
-- 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
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)
(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.
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
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
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