X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FdeSugar%2FDesugar.lhs;h=9a4c2617b1f669c4af2b2862b6145eda7f4e9167;hp=dc0e1244266c4e98ec931f4dcf8f26f9b6078294;hb=c1681a73fa4ca4cf8758264ae387ac09a9e900d8;hpb=7a59afcebe45ea87c42006873f77eb4600d7316f diff --git a/compiler/deSugar/Desugar.lhs b/compiler/deSugar/Desugar.lhs index dc0e124..9a4c261 100644 --- a/compiler/deSugar/Desugar.lhs +++ b/compiler/deSugar/Desugar.lhs @@ -1,48 +1,51 @@ % +% (c) The University of Glasgow 2006 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998 % -\section[Desugar]{@deSugar@: the main function} + +The Desugarer: turning HsSyn into Core. \begin{code} module Desugar ( deSugar, deSugarExpr ) where #include "HsVersions.h" -import DynFlags ( DynFlag(..), DynFlags(..), dopt, GhcMode(..) ) -import StaticFlags ( opt_SccProfilingOn ) -import DriverPhases ( isHsBoot ) -import HscTypes ( ModGuts(..), HscEnv(..), - Dependencies(..), ForeignStubs(..), TypeEnv, IsBootInterface ) -import HsSyn ( RuleDecl(..), RuleBndr(..), LHsExpr, LRuleDecl ) -import TcRnTypes ( TcGblEnv(..), ImportAvails(..) ) -import MkIface ( mkUsageInfo ) -import Id ( Id, setIdExported, idName ) -import Name ( Name, isExternalName, nameIsLocalOrFrom, nameOccName ) +import DynFlags +import StaticFlags +import HscTypes +import HsSyn +import TcRnTypes +import MkIface +import Id +import Name import CoreSyn -import PprCore ( pprRules, pprCoreExpr ) +import OccurAnal +import PprCore import DsMonad -import DsExpr ( dsLExpr ) -import DsBinds ( dsTopLHsBinds, decomposeRuleLhs, AutoScc(..) ) -import DsForeign ( dsForeigns ) +import DsExpr +import DsBinds +import DsForeign import DsExpr () -- Forces DsExpr to be compiled; DsBinds only -- depends on DsExpr.hi-boot. import Module -import UniqFM ( eltsUFM, delFromUFM ) -import PackageConfig ( thPackageId ) -import RdrName ( GlobalRdrEnv ) +import UniqFM +import PackageConfig +import RdrName import NameSet import VarSet -import Rules ( roughTopNames ) -import CoreLint ( showPass, endPass ) -import CoreFVs ( ruleRhsFreeVars, exprsFreeNames ) -import ErrUtils ( doIfSet, dumpIfSet_dyn ) -import ListSetOps ( insertList ) +import Rules +import CoreLint +import CoreFVs +import ErrUtils +import ListSetOps import Outputable -import SrcLoc ( Located(..) ) -import DATA_IOREF ( readIORef ) -import Maybes ( catMaybes ) +import SrcLoc +import Maybes import FastString -import Util ( sortLe ) +import Util +import Coverage +import IOEnv +import Data.IORef \end{code} %************************************************************************ @@ -52,47 +55,64 @@ import Util ( sortLe ) %************************************************************************ \begin{code} -deSugar :: HscEnv -> TcGblEnv -> IO (Maybe ModGuts) +deSugar :: HscEnv -> ModLocation -> TcGblEnv -> IO (Maybe ModGuts) -- Can modify PCS by faulting in more declarations deSugar hsc_env - tcg_env@(TcGblEnv { tcg_mod = mod, - tcg_src = hsc_src, - tcg_type_env = type_env, - tcg_imports = imports, - tcg_exports = exports, - tcg_dus = dus, - tcg_inst_uses = dfun_uses_var, - tcg_th_used = th_var, - tcg_keep = keep_var, - tcg_rdr_env = rdr_env, - tcg_fix_env = fix_env, - tcg_deprecs = deprecs, - tcg_binds = binds, - tcg_fords = fords, - tcg_rules = rules, - tcg_insts = insts }) - = do { showPass dflags "Desugar" + mod_loc + tcg_env@(TcGblEnv { tcg_mod = mod, + tcg_src = hsc_src, + tcg_type_env = type_env, + tcg_imports = imports, + tcg_exports = exports, + tcg_dus = dus, + tcg_inst_uses = dfun_uses_var, + tcg_th_used = th_var, + tcg_keep = keep_var, + tcg_rdr_env = rdr_env, + tcg_fix_env = fix_env, + tcg_inst_env = inst_env, + tcg_fam_inst_env = fam_inst_env, + tcg_deprecs = deprecs, + tcg_binds = binds, + tcg_fords = fords, + tcg_rules = rules, + tcg_insts = insts, + tcg_fam_insts = fam_insts, + tcg_hpc = other_hpc_info }) + + = do { let dflags = hsc_dflags hsc_env + ; showPass dflags "Desugar" -- Desugar the program - ; mb_res <- case ghcMode dflags of - JustTypecheck -> return (Just ([], [], NoStubs)) - _ -> initDs hsc_env mod rdr_env type_env $ do - { core_prs <- dsTopLHsBinds auto_scc binds + ; let export_set = availsToNameSet exports + ; let auto_scc = mkAutoScc mod export_set + ; let target = hscTarget dflags + ; let hpcInfo = emptyHpcInfo other_hpc_info + ; mb_res <- case target of + HscNothing -> return (Just ([], [], NoStubs, hpcInfo, emptyModBreaks)) + _ -> do (binds_cvr,ds_hpc_info, modBreaks) + <- if (opt_Hpc + || target == HscInterpreted) + && (not (isHsBoot hsc_src)) + then addCoverageTicksToBinds dflags mod mod_loc (typeEnvTyCons type_env) binds + else return (binds, hpcInfo, emptyModBreaks) + initDs hsc_env mod rdr_env type_env $ do + { core_prs <- dsTopLHsBinds auto_scc binds_cvr ; (ds_fords, foreign_prs) <- dsForeigns fords ; let all_prs = foreign_prs ++ core_prs local_bndrs = mkVarSet (map fst all_prs) ; ds_rules <- mappM (dsRule mod local_bndrs) rules - ; return (all_prs, catMaybes ds_rules, ds_fords) + ; return (all_prs, catMaybes ds_rules, ds_fords, ds_hpc_info, modBreaks) } ; case mb_res of { Nothing -> return Nothing ; - Just (all_prs, ds_rules, ds_fords) -> do + Just (all_prs, ds_rules, ds_fords,ds_hpc_info, modBreaks) -> do { -- Add export flags to bindings keep_alive <- readIORef keep_var - ; let final_prs = addExportFlags ghci_mode exports keep_alive - all_prs ds_rules + ; let final_prs = addExportFlags target export_set + keep_alive all_prs ds_rules ds_binds = [Rec 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# @@ -134,35 +154,48 @@ deSugar hsc_env le_dep_mod :: (ModuleName, IsBootInterface) -> (ModuleName, IsBootInterface) -> Bool le_dep_mod (m1,_) (m2,_) = moduleNameFS m1 <= moduleNameFS m2 - deps = Deps { dep_mods = sortLe le_dep_mod dep_mods, - dep_pkgs = sortLe (<=) pkgs, - dep_orphs = sortLe le_mod (imp_orphs imports) } + deps = Deps { dep_mods = sortLe le_dep_mod dep_mods, + dep_pkgs = sortLe (<=) pkgs, + dep_orphs = sortLe le_mod (imp_orphs imports), + dep_finsts = sortLe le_mod (imp_finsts imports) } -- sort to get into canonical order mod_guts = ModGuts { - mg_module = mod, - mg_boot = isHsBoot hsc_src, - mg_exports = exports, - mg_deps = deps, - mg_usages = usages, - mg_dir_imps = [m | (m,_,_) <- moduleEnvElts dir_imp_mods], - mg_rdr_env = rdr_env, - mg_fix_env = fix_env, - mg_deprecs = deprecs, - mg_types = type_env, - mg_insts = insts, - mg_rules = ds_rules, - mg_binds = ds_binds, - mg_foreign = ds_fords } - + mg_module = mod, + mg_boot = isHsBoot hsc_src, + mg_exports = exports, + mg_deps = deps, + mg_usages = usages, + mg_dir_imps = [m | (m,_,_) <- moduleEnvElts dir_imp_mods], + mg_rdr_env = rdr_env, + mg_fix_env = fix_env, + mg_deprecs = deprecs, + mg_types = type_env, + mg_insts = insts, + mg_fam_insts = fam_insts, + mg_inst_env = inst_env, + mg_fam_inst_env = fam_inst_env, + mg_rules = ds_rules, + mg_binds = ds_binds, + mg_foreign = ds_fords, + mg_hpc_info = ds_hpc_info, + mg_modBreaks = modBreaks, + mg_vect_info = noVectInfo + } ; return (Just mod_guts) }}} - where - dflags = hsc_dflags hsc_env - ghci_mode = ghcMode (hsc_dflags hsc_env) - auto_scc | opt_SccProfilingOn = TopLevel - | otherwise = NoSccs +mkAutoScc :: Module -> NameSet -> AutoScc +mkAutoScc mod exports + | not opt_SccProfilingOn -- No profiling + = NoSccs + | opt_AutoSccsOnAllToplevs -- Add auto-scc on all top-level things + = AddSccs mod (\id -> True) + | opt_AutoSccsOnExportedToplevs -- Only on exported things + = AddSccs mod (\id -> idName id `elemNameSet` exports) + | otherwise + = NoSccs + deSugarExpr :: HscEnv -> Module -> GlobalRdrEnv -> TypeEnv @@ -203,7 +236,7 @@ deSugarExpr hsc_env this_mod rdr_env type_env tc_expr -- it's just because the type checker is rather busy already and -- I didn't want to pass in yet another mapping. -addExportFlags ghci_mode exports keep_alive prs rules +addExportFlags target exports keep_alive prs rules = [(add_export bndr, rhs) | (bndr,rhs) <- prs] where add_export bndr @@ -232,7 +265,7 @@ addExportFlags ghci_mode exports keep_alive prs rules -- isExternalName separates the user-defined top-level names from those -- introduced by the type checker. is_exported :: Name -> Bool - is_exported | ghci_mode == Interactive = isExternalName + is_exported | target == HscInterpreted = isExternalName | otherwise = (`elemNameSet` exports) ppr_ds_rules [] = empty @@ -253,31 +286,26 @@ ppr_ds_rules rules dsRule :: Module -> IdSet -> LRuleDecl Id -> DsM (Maybe CoreRule) dsRule mod in_scope (L loc (HsRule name act vars lhs tv_lhs rhs fv_rhs)) = putSrcSpanDs loc $ - do { let bndrs = [var | RuleBndr (L _ var) <- vars] + do { let bndrs = [var | RuleBndr (L _ var) <- vars] ; lhs' <- dsLExpr lhs ; rhs' <- dsLExpr rhs - ; case decomposeRuleLhs bndrs lhs' of { + ; case decomposeRuleLhs (occurAnalyseExpr lhs') of { Nothing -> do { warnDs msg; return Nothing } ; - Just (bndrs', fn_id, args) -> do + Just (fn_id, args) -> do -- Substitute the dict bindings eagerly, -- and take the body apart into a (f args) form - { let local_rule = nameIsLocalOrFrom mod fn_name - -- NB we can't use isLocalId in the orphan test, - -- because isLocalId isn't true of class methods + { let local_rule = isLocalId fn_id + -- NB: isLocalId is False of implicit Ids. This is good becuase + -- we don't want to attach rules to the bindings of implicit Ids, + -- because they don't show up in the bindings until just before code gen fn_name = idName fn_id - lhs_names = fn_name : nameSetToList (exprsFreeNames args) - -- No need to delete bndrs, because - -- exprsFreeNames finds only External names - orph = case filter (nameIsLocalOrFrom mod) lhs_names of - (n:ns) -> Just (nameOccName n) - [] -> Nothing rule = Rule { ru_name = name, ru_fn = fn_name, ru_act = act, - ru_bndrs = bndrs', ru_args = args, ru_rhs = rhs', + ru_bndrs = bndrs, ru_args = args, ru_rhs = rhs', ru_rough = roughTopNames args, - ru_local = local_rule, ru_orph = orph } + ru_local = local_rule } ; return (Just rule) } } } where