Loading interface files
\begin{code}
+{-# OPTIONS -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/Commentary/CodingStyle#Warnings
+-- for details
+
module LoadIface (
loadInterface, loadInterfaceForName, loadWiredInHomeIface,
loadSrcInterface, loadSysInterface, loadOrphanModules,
#include "HsVersions.h"
import {-# SOURCE #-} TcIface( tcIfaceDecl, tcIfaceRules, tcIfaceInst,
- tcIfaceFamInst )
+ tcIfaceFamInst, tcIfaceVectInfo )
import DynFlags
import IfaceSyn
import BinIface
import Panic
-import Control.Monad (when)
import Data.List
import Data.Maybe
import Data.IORef
-- | 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 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_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 =
badDepMsg mod
= hang (ptext SLIT("Interface file inconsistency:"))
- 2 (sep [ptext SLIT("home-package module") <+> quotes (ppr mod) <+> ptext SLIT("is mentioned is needed,"),
- ptext SLIT("but is not among the dependencies of interfaces directly imported by the module being compiled")])
+ 2 (sep [ptext SLIT("home-package module") <+> quotes (ppr mod) <+> ptext SLIT("is needed,"),
+ ptext SLIT("but is not listed in the dependencies of the interfaces directly imported by the module being compiled")])
-----------------------------------------------------
-- Loading type/class/value decls
loadDecl ignore_prags mod (_version, decl)
= do { -- Populate the name cache with final versions of all
-- the names associated with the decl
- main_name <- mk_new_bndr mod (ifName decl)
+ main_name <- lookupOrig mod (ifName decl)
-- ; traceIf (text "Loading decl for " <> ppr main_name)
- ; implicit_names <- mapM (mk_new_bndr mod) (ifaceDeclSubBndrs decl)
+ ; implicit_names <- mapM (lookupOrig mod) (ifaceDeclSubBndrs decl)
-- Typecheck the thing, lazily
-- NB. Firstly, the laziness is there in case we never need the
-- as the TyThings. That way we can extend the PTE without poking the
-- thunks
where
- -- mk_new_bndr allocates in the name cache the final canonical
- -- name for the thing, with the correct
- -- * parent
- -- * location
- -- imported name, to fix the module correctly in the cache
- mk_new_bndr mod occ
- = newGlobalBinder mod occ
- (importedSrcLoc (showSDoc (ppr (moduleName mod))))
- -- ToDo: qualify with the package name if necessary
-
doc = ptext SLIT("Declaration for") <+> ppr (ifName decl)
bumpDeclStats :: Name -> IfL () -- Record that one more declaration has actually been used
-- 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 }
<+> ppr (mi_mod_vers iface) <+> pp_sub_vers
<+> (if mi_orphan iface then ptext SLIT("[orphan module]") else empty)
<+> (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))
, 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
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)
projects / ghc-hetmet.git / blobdiff