#include "HsVersions.h"
import {-# SOURCE #-} TcIface( tcIfaceDecl, tcIfaceRules, tcIfaceInst,
- tcIfaceFamInst )
+ tcIfaceFamInst, tcIfaceVectInfo )
import DynFlags
import IfaceSyn
failWithTc (cannotFindInterface dflags mod err)
-- | Load interfaces for a collection of orphan modules.
-loadOrphanModules :: [Module] -> TcM ()
-loadOrphanModules mods
+loadOrphanModules :: [Module] -- the modules
+ -> Bool -- these are family instance-modules
+ -> TcM ()
+loadOrphanModules mods isFamInstMod
| null mods = returnM ()
| otherwise = initIfaceTcRn $
do { traceIf (text "Loading orphan modules:" <+>
; returnM () }
where
load mod = loadSysInterface (mk_doc mod) mod
- mk_doc mod = ppr mod <+> ptext SLIT("is a orphan-instance module")
+ mk_doc mod
+ | isFamInstMod = ppr mod <+> ptext SLIT("is a family-instance module")
+ | otherwise = ppr mod <+> ptext SLIT("is a orphan-instance module")
-- | Loads the interface for a given Name.
loadInterfaceForName :: SDoc -> Name -> TcRn ModIface
-- | An 'IfM' function to load the home interface for a wired-in thing,
-- so that we're sure that we see its instance declarations and rules
+-- See Note [Loading instances]
loadWiredInHomeIface :: Name -> IfM lcl ()
loadWiredInHomeIface name
= ASSERT( isWiredInName name )
Succeeded iface -> return iface }
\end{code}
+Note [Loading instances]
+~~~~~~~~~~~~~~~~~~~~~~~~
+We need to make sure that we have at least *read* the interface files
+for any module with an instance decl or RULE that we might want.
+
+* If the instance decl is an orphan, we have a whole separate mechanism
+ (loadOprhanModules)
+
+* If the instance decl not an orphan, then the act of looking at the
+ TyCon or Class will force in the defining module for the
+ TyCon/Class, and hence the instance decl
+
+* BUT, if the TyCon is a wired-in TyCon, we don't really need its interface;
+ but we must make sure we read its interface in case it has instances or
+ rules. That is what LoadIface.loadWiredInHomeInterface does. It's called
+ from TcIface.{tcImportDecl, checkWiredInTyCon, ifCHeckWiredInThing}
+
+All of this is done by the type checker. The renamer plays no role.
+(It used to, but no longer.)
+
+
%*********************************************************
%* *
-- The (src_imp == mi_boot iface) test checks that the already-loaded
-- interface isn't a boot iface. This can conceivably happen,
-- if an earlier import had a before we got to real imports. I think.
- other -> do
+ other -> do {
- { let { hi_boot_file = case from of
+ let { hi_boot_file = case from of
ImportByUser usr_boot -> usr_boot
ImportBySystem -> sys_boot
--
-- The main thing is to add the ModIface to the PIT, but
-- we also take the
- -- IfaceDecls, IfaceInst, IfaceRules
+ -- IfaceDecls, IfaceInst, IfaceFamInst, IfaceRules, IfaceVectInfo
-- out of the ModIface and put them into the big EPS pools
-- NB: *first* we do loadDecl, so that the provenance of all the locally-defined
; new_eps_insts <- mapM tcIfaceInst (mi_insts iface)
; new_eps_fam_insts <- mapM tcIfaceFamInst (mi_fam_insts iface)
; new_eps_rules <- tcIfaceRules ignore_prags (mi_rules iface)
+ ; new_eps_vect_info <- tcIfaceVectInfo mod (mkNameEnv new_eps_decls)
+ (mi_vect_info iface)
- ; let { final_iface = iface { mi_decls = panic "No mi_decls in PIT",
- mi_insts = panic "No mi_insts in PIT",
- mi_rules = panic "No mi_rules in PIT" } }
+ ; let { final_iface = iface {
+ mi_decls = panic "No mi_decls in PIT",
+ mi_insts = panic "No mi_insts in PIT",
+ mi_fam_insts = panic "No mi_fam_insts in PIT",
+ mi_rules = panic "No mi_rules in PIT"
+ }
+ }
; updateEps_ $ \ eps ->
eps {
new_eps_insts,
eps_fam_inst_env = extendFamInstEnvList (eps_fam_inst_env eps)
new_eps_fam_insts,
+ eps_vect_info = plusVectInfo (eps_vect_info eps)
+ new_eps_vect_info,
+ eps_mod_fam_inst_env
+ = let
+ fam_inst_env =
+ extendFamInstEnvList emptyFamInstEnv
+ new_eps_fam_insts
+ in
+ extendModuleEnv (eps_mod_fam_inst_env eps)
+ mod
+ fam_inst_env,
eps_stats = addEpsInStats (eps_stats eps)
(length new_eps_decls)
(length new_eps_insts) (length new_eps_rules) }
= do { -- Populate the name cache with final versions of all
-- the names associated with the decl
main_name <- mk_new_bndr mod (ifName decl)
- ; traceIf (text "Loading decl for " <> ppr main_name)
+-- ; traceIf (text "Loading decl for " <> ppr main_name)
; implicit_names <- mapM (mk_new_bndr mod) (ifaceDeclSubBndrs decl)
-- Typecheck the thing, lazily
; thing <- forkM doc $ do { bumpDeclStats main_name
; tcIfaceDecl ignore_prags decl }
- -- Populate the type environment with the implicitTyThings too
+ -- Populate the type environment with the implicitTyThings too.
+ --
+ -- Note [Tricky iface loop]
+ -- ~~~~~~~~~~~~~~~~~~~~~~~~
+ -- The delicate point here is that 'mini-env' should be
+ -- buildable from 'thing' without demanding any of the things 'forkM'd
+ -- by tcIfaceDecl. For example
+ -- class C a where { data T a; op :: T a -> Int }
+ -- We return the bindings
+ -- [("C", <cls>), ("T", lookup env "T"), ("op", lookup env "op")]
+ -- The call (lookup env "T") must return the tycon T without first demanding
+ -- op; because getting the latter will look up T, hence loop.
+ --
+ -- Of course, there is no reason in principle why (lookup env "T") should demand
+ -- anything do to with op, but take care:
+ -- (a) implicitTyThings, and
+ -- (b) getOccName of all the things returned by implicitThings,
+ -- must not depend on any of the nested type-checks
+ --
+ -- All a bit too finely-balanced for my liking.
+
; let mini_env = mkOccEnv [(getOccName t, t) | t <- implicitTyThings thing]
lookup n = case lookupOccEnv mini_env (getOccName n) of
Just thing -> thing
-- * location
-- imported name, to fix the module correctly in the cache
mk_new_bndr mod occ
- = newGlobalBinder mod occ
- (importedSrcLoc (showSDoc (ppr (moduleName mod))))
+ = newGlobalBinder mod occ (importedSrcSpan (moduleNameFS (moduleName mod)))
-- ToDo: qualify with the package name if necessary
doc = ptext SLIT("Declaration for") <+> ppr (ifName decl)
-- Look for the file
; hsc_env <- getTopEnv
- ; mb_found <- ioToIOEnv (findHiFile hsc_env mod hi_boot_file)
+ ; mb_found <- ioToIOEnv (findExactModule hsc_env mod)
; case mb_found of {
- Failed err -> do
+
+ err | notFound err -> do
{ traceIf (ptext SLIT("...not found"))
; dflags <- getDOpts
; returnM (Failed (cannotFindInterface dflags
(moduleName mod) err)) } ;
-
- Succeeded file_path -> do
+ Found loc mod -> do
-- Found file, so read it
- { traceIf (ptext SLIT("readIFace") <+> text file_path)
+ { let { file_path = addBootSuffix_maybe hi_boot_file (ml_hi_file loc) }
+
+ ; if thisPackage dflags == modulePackageId mod
+ && not (isOneShot (ghcMode dflags))
+ then returnM (Failed (homeModError mod loc))
+ else do {
+
+ ; traceIf (ptext SLIT("readIFace") <+> text file_path)
; read_result <- readIface mod file_path hi_boot_file
; case read_result of
Failed err -> returnM (Failed (badIfaceFile file_path err))
| otherwise ->
returnM (Succeeded (iface, file_path))
-- Don't forget to fill in the package name...
- }}}
-
-findHiFile :: HscEnv -> Module -> IsBootInterface
- -> IO (MaybeErr FindResult FilePath)
-findHiFile hsc_env mod hi_boot_file
- = do
- maybe_found <- findExactModule hsc_env mod
- case maybe_found of
- Found loc mod -> return (Succeeded path)
- where
- path = addBootSuffix_maybe hi_boot_file (ml_hi_file loc)
- err -> return (Failed err)
+ }}}}
+
+notFound (Found _ _) = False
+notFound _ = True
\end{code}
@readIface@ tries just the one file.
eps_fam_inst_env = emptyFamInstEnv,
eps_rule_base = mkRuleBase builtinRules,
-- Initialise the EPS rule pool with the built-in rules
+ eps_mod_fam_inst_env
+ = emptyModuleEnv,
+ eps_vect_info = noVectInfo,
eps_stats = EpsStats { n_ifaces_in = 0, n_decls_in = 0, n_decls_out = 0
, n_insts_in = 0, n_insts_out = 0
, n_rules_in = length builtinRules, n_rules_out = 0 }
hsep [ int (n_rules_out stats), text "rule decls imported, out of",
int (n_rules_in stats), text "read"]
]
-\end{code}
+\end{code}
%************************************************************************
<+> ppr (mi_module iface) <+> pp_boot
<+> ppr (mi_mod_vers iface) <+> pp_sub_vers
<+> (if mi_orphan iface then ptext SLIT("[orphan module]") else empty)
- <+> int opt_HiVersion
+ <+> (if mi_finsts iface then ptext SLIT("[family instance module]") else empty)
+ <+> (if mi_hpc iface then ptext SLIT("[hpc]") else empty)
+ <+> integer opt_HiVersion
<+> ptext SLIT("where")
, vcat (map pprExport (mi_exports iface))
, pprDeps (mi_deps iface)
, pprFixities (mi_fixities iface)
, vcat (map pprIfaceDecl (mi_decls iface))
, vcat (map ppr (mi_insts iface))
+ , vcat (map ppr (mi_fam_insts iface))
, vcat (map ppr (mi_rules iface))
+ , pprVectInfo (mi_vect_info iface)
, pprDeprecs (mi_deprecs iface)
- ]
+ ]
where
pp_boot | mi_boot iface = ptext SLIT("[boot]")
| otherwise = empty
pp_export_version (Just v) = int v
pprDeps :: Dependencies -> SDoc
-pprDeps (Deps { dep_mods = mods, dep_pkgs = pkgs, dep_orphs = orphs})
+pprDeps (Deps { dep_mods = mods, dep_pkgs = pkgs, dep_orphs = orphs,
+ dep_finsts = finsts })
= vcat [ptext SLIT("module dependencies:") <+> fsep (map ppr_mod mods),
ptext SLIT("package dependencies:") <+> fsep (map ppr pkgs),
- ptext SLIT("orphans:") <+> fsep (map ppr orphs)
+ ptext SLIT("orphans:") <+> fsep (map ppr orphs),
+ ptext SLIT("family instance modules:") <+> fsep (map ppr finsts)
]
where
ppr_mod (mod_name, boot) = ppr mod_name <+> ppr_boot boot
where
pprFix (occ,fix) = ppr fix <+> ppr occ
+pprVectInfo :: IfaceVectInfo -> SDoc
+pprVectInfo (IfaceVectInfo { ifaceVectInfoVar = vars
+ , ifaceVectInfoTyCon = tycons
+ , ifaceVectInfoTyConReuse = tyconsReuse
+ }) =
+ vcat
+ [ ptext SLIT("vectorised variables:") <+> hsep (map ppr vars)
+ , ptext SLIT("vectorised tycons:") <+> hsep (map ppr tycons)
+ , ptext SLIT("vectorised reused tycons:") <+> hsep (map ppr tyconsReuse)
+ ]
+
pprDeprecs NoDeprecs = empty
pprDeprecs (DeprecAll txt) = ptext SLIT("Deprecate all") <+> doubleQuotes (ftext txt)
pprDeprecs (DeprecSome prs) = ptext SLIT("Deprecate") <+> vcat (map pprDeprec prs)
]
]
where iface_file = doubleQuotes (text file_path)
+
+homeModError mod location
+ = ptext SLIT("attempting to use module ") <> quotes (ppr mod)
+ <> (case ml_hs_file location of
+ Just file -> space <> parens (text file)
+ Nothing -> empty)
+ <+> ptext SLIT("which is not loaded")
\end{code}
projects / ghc-hetmet.git / blobdiff