    {-# LANGUAGE LambdaCase #-}
    {-# LANGUAGE NondecreasingIndentation #-}
    {-# LANGUAGE GADTs #-}
    {-# LANGUAGE MultiWayIf #-}

    {-# OPTIONS_GHC -fprof-auto-top #-}

    -------------------------------------------------------------------------------
    --
    -- | Main API for compiling plain Haskell source code.
    --
    -- This module implements compilation of a Haskell source. It is
    -- /not/ concerned with preprocessing of source files; this is handled
    -- in "GHC.Driver.Pipeline"
    --
    -- There are various entry points depending on what mode we're in:
    -- "batch" mode (@--make@), "one-shot" mode (@-c@, @-S@ etc.), and
    -- "interactive" mode (GHCi). There are also entry points for
    -- individual passes: parsing, typechecking/renaming, desugaring, and
    -- simplification.
    --
    -- All the functions here take an 'HscEnv' as a parameter, but none of
    -- them return a new one: 'HscEnv' is treated as an immutable value
    -- from here on in (although it has mutable components, for the
    -- caches).
    --
    -- We use the Hsc monad to deal with warning messages consistently:
    -- specifically, while executing within an Hsc monad, warnings are
    -- collected. When a Hsc monad returns to an IO monad, the
    -- warnings are printed, or compilation aborts if the @-Werror@
    -- flag is enabled.
    --
    -- (c) The GRASP/AQUA Project, Glasgow University, 1993-2000
    --
    -------------------------------------------------------------------------------

    module GHC.Driver.Main
        (
        -- * Making an HscEnv
          newHscEnv
        , newHscEnvWithHUG
        , initHscEnv

        -- * Compiling complete source files
        , Messager, batchMsg, batchMultiMsg
        , HscBackendAction (..), HscRecompStatus (..)
        , initModDetails
        , initWholeCoreBindings
        , loadIfaceByteCode
        , loadIfaceByteCodeLazy
        , hscMaybeWriteIface
        , hscCompileCmmFile

        , hscGenHardCode
        , hscInteractive
        , mkCgInteractiveGuts
        , CgInteractiveGuts
        , generateByteCode
        , generateFreshByteCode

        -- * Running passes separately
        , hscRecompStatus
        , hscParse
        , hscTypecheckRename
        , hscTypecheckRenameWithDiagnostics
        , hscTypecheckAndGetWarnings
        , hscDesugar
        , makeSimpleDetails
        , hscSimplify -- ToDo, shouldn't really export this
        , hscDesugarAndSimplify

        -- * Safe Haskell
        , hscCheckSafe
        , hscGetSafe

        -- * Support for interactive evaluation
        , hscParseIdentifier
        , hscTcRcLookupName
        , hscTcRnGetInfo
        , hscIsGHCiMonad
        , hscGetModuleInterface
        , hscRnImportDecls
        , hscTcRnLookupRdrName
        , hscStmt, hscParseStmtWithLocation, hscStmtWithLocation, hscParsedStmt
        , hscParseDeclsWithLocation, hscParsedDecls
        , hscParseModuleWithLocation
        , hscTcExpr, TcRnExprMode(..), hscImport, hscKcType
        , hscParseExpr
        , hscParseType
        , hscCompileCoreExpr
        , hscTidy

        -- * Low-level exports for hooks
        , hscCompileCoreExpr'
          -- We want to make sure that we export enough to be able to redefine
          -- hsc_typecheck in client code
        , hscParse', hscSimplify', hscDesugar', tcRnModule', doCodeGen
        , getHscEnv
        , hscSimpleIface'
        , oneShotMsg
        , dumpIfaceStats
        , ioMsgMaybe
        , showModuleIndex
        , hscAddSptEntries
        , writeInterfaceOnlyMode
        , loadByteCode
        , genModDetails
        ) where

    import GHC.Prelude

    import GHC.Platform

    import GHC.Driver.Plugins
    import GHC.Driver.Session
    import GHC.Driver.Backend
    import GHC.Driver.Env
    import GHC.Driver.Env.KnotVars
    import GHC.Driver.Errors
    import GHC.Driver.Messager
    import GHC.Driver.Errors.Types
    import GHC.Driver.CodeOutput
    import GHC.Driver.Config.Cmm.Parser (initCmmParserConfig)
    import GHC.Driver.Config.Core.Opt.Simplify ( initSimplifyExprOpts )
    import GHC.Driver.Config.Core.Lint ( endPassHscEnvIO )
    import GHC.Driver.Config.Core.Lint.Interactive ( lintInteractiveExpr )
    import GHC.Driver.Config.CoreToStg
    import GHC.Driver.Config.CoreToStg.Prep
    import GHC.Driver.Config.Logger   (initLogFlags)
    import GHC.Driver.Config.Parser   (initParserOpts)
    import GHC.Driver.Config.Stg.Ppr  (initStgPprOpts)
    import GHC.Driver.Config.Stg.Pipeline (initStgPipelineOpts)
    import GHC.Driver.Config.StgToCmm  (initStgToCmmConfig)
    import GHC.Driver.Config.Cmm       (initCmmConfig)
    import GHC.Driver.LlvmConfigCache  (initLlvmConfigCache)
    import GHC.Driver.Config.StgToJS  (initStgToJSConfig)
    import GHC.Driver.Config.Diagnostic
    import GHC.Driver.Config.Tidy
    import GHC.Driver.Hooks
    import GHC.Driver.GenerateCgIPEStub (generateCgIPEStub, lookupEstimatedTicks)

    import GHC.Runtime.Context
    import GHC.Runtime.Interpreter
    import GHC.Runtime.Interpreter.JS
    import GHC.Runtime.Loader      ( initializePlugins )
    import GHCi.RemoteTypes
    import GHC.ByteCode.Types

    import GHC.Linker.Loader
    import GHC.Linker.Types
    import GHC.Linker.Deps

    import GHC.Hs
    import GHC.Hs.Dump
    import GHC.Hs.Stats         ( ppSourceStats )

    import GHC.HsToCore

    import GHC.StgToByteCode    ( byteCodeGen )
    import GHC.StgToJS          ( stgToJS )
    import GHC.StgToJS.Ids
    import GHC.StgToJS.Types
    import GHC.JS.Syntax

    import GHC.IfaceToCore  ( typecheckIface, typecheckWholeCoreBindings )

    import GHC.Iface.Load   ( ifaceStats, writeIface, flagsToIfCompression, getGhcPrimIface )
    import GHC.Iface.Make
    import GHC.Iface.Recomp
    import GHC.Iface.Tidy
    import GHC.Iface.Ext.Ast    ( mkHieFile )
    import GHC.Iface.Ext.Types  ( getAsts, hie_asts, hie_module )
    import GHC.Iface.Ext.Binary ( readHieFile, writeHieFile , hie_file_result)
    import GHC.Iface.Ext.Debug  ( diffFile, validateScopes )

    import GHC.Core
    import GHC.Core.Lint.Interactive ( interactiveInScope )
    import GHC.Core.Tidy           ( tidyExpr )
    import GHC.Core.Utils          ( exprType )
    import GHC.Core.ConLike
    import GHC.Core.Opt.Pipeline
    import GHC.Core.Opt.Pipeline.Types      ( CoreToDo (..))
    import GHC.Core.TyCon
    import GHC.Core.InstEnv
    import GHC.Core.FamInstEnv
    import GHC.Core.Rules
    import GHC.Core.Stats
    import GHC.Core.LateCC
    import GHC.Core.LateCC.Types

    import GHC.CoreToStg.Prep( CorePrepPgmConfig, corePrepPgm, corePrepExpr )
    import GHC.CoreToStg.AddImplicitBinds( addImplicitBinds )
    import GHC.CoreToStg    ( coreToStg )

    import GHC.Parser.Errors.Types
    import GHC.Parser
    import GHC.Parser.Lexer as Lexer

    import GHC.Tc.Module
    import GHC.Tc.Utils.Monad
    import GHC.Tc.Utils.TcType
    import GHC.Tc.Zonk.Env ( ZonkFlexi (DefaultFlexi) )

    import GHC.Stg.Syntax
    import GHC.Stg.Pipeline ( stg2stg, StgCgInfos )

    import GHC.Builtin.Names

    import qualified GHC.StgToCmm as StgToCmm ( codeGen )
    import GHC.StgToCmm.Types (CmmCgInfos (..), ModuleLFInfos, LambdaFormInfo(..))
    import GHC.StgToCmm.CgUtils (CgStream)

    import GHC.Cmm
    import GHC.Cmm.Info.Build
    import GHC.Cmm.Pipeline
    import GHC.Cmm.Info
    import GHC.Cmm.Parser
    import GHC.Cmm.UniqueRenamer

    import GHC.Unit
    import GHC.Unit.Env
    import GHC.Unit.Finder
    import GHC.Unit.Module.ModDetails
    import GHC.Unit.Module.ModGuts
    import GHC.Unit.Module.ModIface
    import GHC.Unit.Module.ModSummary
    import GHC.Unit.Module.Graph
    import GHC.Unit.Module.Imported
    import GHC.Unit.Module.Deps
    import GHC.Unit.Module.Status
    import GHC.Unit.Home.ModInfo

    import GHC.Types.Id
    import GHC.Types.SourceError
    import GHC.Types.SafeHaskell
    import GHC.Types.ForeignStubs
    import GHC.Types.Name.Env      ( mkNameEnv )
    import GHC.Types.Var.Env       ( mkEmptyTidyEnv )
    import GHC.Types.Var.Set
    import GHC.Types.Error
    import GHC.Types.Fixity.Env
    import GHC.Types.CostCentre
    import GHC.Types.IPE
    import GHC.Types.SourceFile
    import GHC.Types.SrcLoc
    import GHC.Types.Name
    import GHC.Types.Name.Cache ( newNameCache )
    import GHC.Types.Name.Reader
    import GHC.Types.Name.Ppr
    import GHC.Types.TyThing
    import GHC.Types.Unique.Supply (uniqFromTag)
    import GHC.Types.Unique.Set

    import GHC.Utils.Fingerprint ( Fingerprint )
    import GHC.Utils.Panic
    import GHC.Utils.Error
    import GHC.Utils.Outputable
    import GHC.Utils.Misc
    import GHC.Utils.Logger
    import GHC.Utils.TmpFs
    import GHC.Utils.Touch

    import qualified GHC.LanguageExtensions as LangExt

    import GHC.Data.FastString
    import GHC.Data.Bag
    import GHC.Data.OsPath (unsafeEncodeUtf)
    import GHC.Data.StringBuffer
    import qualified GHC.Data.Stream as Stream
    import GHC.Data.Maybe

    import GHC.SysTools (initSysTools)
    import GHC.SysTools.BaseDir (findTopDir)

    import Data.Data hiding (Fixity, TyCon)
    import Data.Functor ((<&>))
    import Data.List ( nub, isPrefixOf, partition )
    import qualified Data.List.NonEmpty as NE
    import Control.Monad
    import Data.IORef
    import System.FilePath as FilePath
    import System.Directory
    import qualified Data.Map as M
    import Data.Map (Map)
    import qualified Data.Set as S
    import Data.Set (Set)
    import Control.DeepSeq (force)
    import Data.List.NonEmpty (NonEmpty ((:|)))
    import GHC.Unit.Module.WholeCoreBindings
    import GHC.Types.TypeEnv
    import System.IO
    import {-# SOURCE #-} GHC.Driver.Pipeline
    import Data.Time

    import System.IO.Unsafe ( unsafeInterleaveIO )
    import GHC.Iface.Env ( trace_if )
    import GHC.Platform.Ways
    import GHC.Stg.EnforceEpt.TagSig (seqTagSig)
    import GHC.StgToCmm.Utils (IPEStats)
    import GHC.Types.Unique.FM
    import GHC.Types.Unique.DFM
    import GHC.Cmm.Config (CmmConfig)
    import Data.Bifunctor
    import qualified GHC.Unit.Home.Graph as HUG
    import GHC.Unit.Home.PackageTable

    {- **********************************************************************
    %*                                                                      *
                    Initialisation
    %*                                                                      *
    %********************************************************************* -}

    newHscEnv :: FilePath -> DynFlags -> IO HscEnv
    newHscEnv :: [Char] -> DynFlags -> IO HscEnv
    newHscEnv [Char]
    top_dir DynFlags
    dflags = do
      hpt <- IO HomePackageTable
    emptyHomePackageTable
      newHscEnvWithHUG top_dir dflags (homeUnitId_ dflags) (home_unit_graph hpt)
      where
        home_unit_graph :: HomePackageTable -> HomeUnitGraph
    home_unit_graph HomePackageTable
    hpt = UnitId -> HomeUnitEnv -> HomeUnitGraph
    forall v. UnitId -> v -> UnitEnvGraph v
    HUG.unitEnv_singleton
                            (DynFlags -> UnitId
    homeUnitId_ DynFlags
    dflags)
                            (UnitState
    -> Maybe [UnitDatabase UnitId]
    -> DynFlags
    -> HomePackageTable
    -> Maybe HomeUnit
    -> HomeUnitEnv
    HUG.mkHomeUnitEnv UnitState
    emptyUnitState Maybe [UnitDatabase UnitId]
    forall a. Maybe a
    Nothing DynFlags
    dflags HomePackageTable
    hpt Maybe HomeUnit
    forall a. Maybe a
    Nothing)

    newHscEnvWithHUG :: FilePath -> DynFlags -> UnitId -> HomeUnitGraph -> IO HscEnv
    newHscEnvWithHUG :: [Char] -> DynFlags -> UnitId -> HomeUnitGraph -> IO HscEnv
    newHscEnvWithHUG [Char]
    top_dir DynFlags
    top_dynflags UnitId
    cur_unit HomeUnitGraph
    home_unit_graph = do
        nc_var  <- IO NameCache
    newNameCache
        fc_var  <- initFinderCache
        logger  <- initLogger
        tmpfs   <- initTmpFs
        let dflags = HomeUnitEnv -> DynFlags
    homeUnitEnv_dflags (HomeUnitEnv -> DynFlags) -> HomeUnitEnv -> DynFlags
    forall a b. (a -> b) -> a -> b
    $ UnitId -> HomeUnitGraph -> HomeUnitEnv
    forall v. UnitId -> UnitEnvGraph v -> v
    HUG.unitEnv_lookup UnitId
    cur_unit HomeUnitGraph
    home_unit_graph
        unit_env <- initUnitEnv cur_unit home_unit_graph (ghcNameVersion dflags) (targetPlatform dflags)
        llvm_config <- initLlvmConfigCache top_dir
        return HscEnv { hsc_dflags         = top_dynflags
                      , hsc_logger         = setLogFlags logger (initLogFlags top_dynflags)
                      , hsc_targets        = []
                      , hsc_IC             = emptyInteractiveContext dflags
                      , hsc_NC             = nc_var
                      , hsc_FC             = fc_var
                      , hsc_type_env_vars  = emptyKnotVars
                      , hsc_interp         = Nothing
                      , hsc_unit_env       = unit_env
                      , hsc_plugins        = emptyPlugins
                      , hsc_hooks          = emptyHooks
                      , hsc_tmpfs          = tmpfs
                      , hsc_llvm_config    = llvm_config
                      }

    -- | Initialize HscEnv from an optional top_dir path
    initHscEnv :: Maybe FilePath -> IO HscEnv
    initHscEnv :: Maybe [Char] -> IO HscEnv
    initHscEnv Maybe [Char]
    mb_top_dir = do
      top_dir <- Maybe [Char] -> IO [Char]
    findTopDir Maybe [Char]
    mb_top_dir
      mySettings <- initSysTools top_dir
      dflags <- initDynFlags (defaultDynFlags mySettings)
      hsc_env <- newHscEnv top_dir dflags
      setUnsafeGlobalDynFlags dflags
       -- c.f. DynFlags.parseDynamicFlagsFull, which
       -- creates DynFlags and sets the UnsafeGlobalDynFlags
      return hsc_env

    -- -----------------------------------------------------------------------------

    getDiagnostics :: Hsc (Messages GhcMessage)
    getDiagnostics :: Hsc (Messages GhcMessage)
    getDiagnostics = (HscEnv
     -> Messages GhcMessage
     -> IO (Messages GhcMessage, Messages GhcMessage))
    -> Hsc (Messages GhcMessage)
    forall a.
    (HscEnv -> Messages GhcMessage -> IO (a, Messages GhcMessage))
    -> Hsc a
    Hsc ((HscEnv
      -> Messages GhcMessage
      -> IO (Messages GhcMessage, Messages GhcMessage))
     -> Hsc (Messages GhcMessage))
    -> (HscEnv
        -> Messages GhcMessage
        -> IO (Messages GhcMessage, Messages GhcMessage))
    -> Hsc (Messages GhcMessage)
    forall a b. (a -> b) -> a -> b
    $ \HscEnv
    _ Messages GhcMessage
    w -> (Messages GhcMessage, Messages GhcMessage)
    -> IO (Messages GhcMessage, Messages GhcMessage)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (Messages GhcMessage
    w, Messages GhcMessage
    w)

    clearDiagnostics :: Hsc ()
    clearDiagnostics :: Hsc ()
    clearDiagnostics = (HscEnv -> Messages GhcMessage -> IO ((), Messages GhcMessage))
    -> Hsc ()
    forall a.
    (HscEnv -> Messages GhcMessage -> IO (a, Messages GhcMessage))
    -> Hsc a
    Hsc ((HscEnv -> Messages GhcMessage -> IO ((), Messages GhcMessage))
     -> Hsc ())
    -> (HscEnv -> Messages GhcMessage -> IO ((), Messages GhcMessage))
    -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ \HscEnv
    _ Messages GhcMessage
    _ -> ((), Messages GhcMessage) -> IO ((), Messages GhcMessage)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ((), Messages GhcMessage
    forall e. Messages e
    emptyMessages)

    logDiagnostics :: Messages GhcMessage -> Hsc ()
    logDiagnostics :: Messages GhcMessage -> Hsc ()
    logDiagnostics Messages GhcMessage
    w = (HscEnv -> Messages GhcMessage -> IO ((), Messages GhcMessage))
    -> Hsc ()
    forall a.
    (HscEnv -> Messages GhcMessage -> IO (a, Messages GhcMessage))
    -> Hsc a
    Hsc ((HscEnv -> Messages GhcMessage -> IO ((), Messages GhcMessage))
     -> Hsc ())
    -> (HscEnv -> Messages GhcMessage -> IO ((), Messages GhcMessage))
    -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ \HscEnv
    _ Messages GhcMessage
    w0 -> ((), Messages GhcMessage) -> IO ((), Messages GhcMessage)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ((), Messages GhcMessage
    w0 Messages GhcMessage -> Messages GhcMessage -> Messages GhcMessage
    forall e. Messages e -> Messages e -> Messages e
    `unionMessages` Messages GhcMessage
    w)

    getHscEnv :: Hsc HscEnv
    getHscEnv :: Hsc HscEnv
    getHscEnv = (HscEnv -> Messages GhcMessage -> IO (HscEnv, Messages GhcMessage))
    -> Hsc HscEnv
    forall a.
    (HscEnv -> Messages GhcMessage -> IO (a, Messages GhcMessage))
    -> Hsc a
    Hsc ((HscEnv
      -> Messages GhcMessage -> IO (HscEnv, Messages GhcMessage))
     -> Hsc HscEnv)
    -> (HscEnv
        -> Messages GhcMessage -> IO (HscEnv, Messages GhcMessage))
    -> Hsc HscEnv
    forall a b. (a -> b) -> a -> b
    $ \HscEnv
    e Messages GhcMessage
    w -> (HscEnv, Messages GhcMessage) -> IO (HscEnv, Messages GhcMessage)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HscEnv
    e, Messages GhcMessage
    w)

    handleWarnings :: Hsc ()
    handleWarnings :: Hsc ()
    handleWarnings = do
        diag_opts <- DynFlags -> DiagOpts
    initDiagOpts (DynFlags -> DiagOpts) -> Hsc DynFlags -> Hsc DiagOpts
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> Hsc DynFlags
    forall (m :: * -> *). HasDynFlags m => m DynFlags
    getDynFlags
        print_config <- initPrintConfig <$> getDynFlags
        logger <- getLogger
        w <- getDiagnostics
        liftIO $ printOrThrowDiagnostics logger print_config diag_opts w
        clearDiagnostics

    -- | log warning in the monad, and if there are errors then
    -- throw a SourceError exception.
    logWarningsReportErrors :: (Messages PsWarning, Messages PsError) -> Hsc ()
    logWarningsReportErrors :: (Messages PsWarning, Messages PsWarning) -> Hsc ()
    logWarningsReportErrors (Messages PsWarning
    warnings,Messages PsWarning
    errors) = do
        Messages GhcMessage -> Hsc ()
    logDiagnostics (PsWarning -> GhcMessage
    GhcPsMessage (PsWarning -> GhcMessage)
    -> Messages PsWarning -> Messages GhcMessage
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> Messages PsWarning
    warnings)
        Bool -> Hsc () -> Hsc ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    when (Bool -> Bool
    not (Bool -> Bool) -> Bool -> Bool
    forall a b. (a -> b) -> a -> b
    $ Messages PsWarning -> Bool
    forall e. Messages e -> Bool
    isEmptyMessages Messages PsWarning
    errors) (Hsc () -> Hsc ()) -> Hsc () -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ Messages GhcMessage -> Hsc ()
    forall (io :: * -> *) a. MonadIO io => Messages GhcMessage -> io a
    throwErrors (PsWarning -> GhcMessage
    GhcPsMessage (PsWarning -> GhcMessage)
    -> Messages PsWarning -> Messages GhcMessage
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> Messages PsWarning
    errors)

    -- | Log warnings and throw errors, assuming the messages
    -- contain at least one error (e.g. coming from PFailed)
    handleWarningsThrowErrors :: (Messages PsWarning, Messages PsError) -> Hsc a
    handleWarningsThrowErrors :: forall a. (Messages PsWarning, Messages PsWarning) -> Hsc a
    handleWarningsThrowErrors (Messages PsWarning
    warnings, Messages PsWarning
    errors) = do
        diag_opts <- DynFlags -> DiagOpts
    initDiagOpts (DynFlags -> DiagOpts) -> Hsc DynFlags -> Hsc DiagOpts
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> Hsc DynFlags
    forall (m :: * -> *). HasDynFlags m => m DynFlags
    getDynFlags
        logDiagnostics (GhcPsMessage <$> warnings)
        logger <- getLogger
        let (wWarns, wErrs) = partitionMessages warnings
        liftIO $ printMessages logger NoDiagnosticOpts diag_opts wWarns
        throwErrors $ fmap GhcPsMessage $ errors `unionMessages` wErrs

    -- | Deal with errors and warnings returned by a compilation step
    --
    -- In order to reduce dependencies to other parts of the compiler, functions
    -- outside the "main" parts of GHC return warnings and errors as a parameter
    -- and signal success via by wrapping the result in a 'Maybe' type. This
    -- function logs the returned warnings and propagates errors as exceptions
    -- (of type 'SourceError').
    --
    -- This function assumes the following invariants:
    --
    --  1. If the second result indicates success (is of the form 'Just x'),
    --     there must be no error messages in the first result.
    --
    --  2. If there are no error messages, but the second result indicates failure
    --     there should be warnings in the first result. That is, if the action
    --     failed, it must have been due to the warnings (i.e., @-Werror@).
    ioMsgMaybe :: IO (Messages GhcMessage, Maybe a) -> Hsc a
    ioMsgMaybe :: forall a. IO (Messages GhcMessage, Maybe a) -> Hsc a
    ioMsgMaybe IO (Messages GhcMessage, Maybe a)
    ioA = do
        (msgs, mb_r) <- IO (Messages GhcMessage, Maybe a)
    -> Hsc (Messages GhcMessage, Maybe a)
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO IO (Messages GhcMessage, Maybe a)
    ioA
        let (warns, errs) = partitionMessages msgs
        logDiagnostics warns
        case mb_r of
            Maybe a
    Nothing -> Messages GhcMessage -> Hsc a
    forall (io :: * -> *) a. MonadIO io => Messages GhcMessage -> io a
    throwErrors Messages GhcMessage
    errs
            Just a
    r  -> Bool -> (a -> Hsc a) -> a -> Hsc a
    forall a. HasCallStack => Bool -> a -> a
    assert (Messages GhcMessage -> Bool
    forall e. Messages e -> Bool
    isEmptyMessages Messages GhcMessage
    errs ) a -> Hsc a
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return a
    r

    -- | like ioMsgMaybe, except that we ignore error messages and return
    -- 'Nothing' instead.
    ioMsgMaybe' :: IO (Messages GhcMessage, Maybe a) -> Hsc (Maybe a)
    ioMsgMaybe' :: forall a. IO (Messages GhcMessage, Maybe a) -> Hsc (Maybe a)
    ioMsgMaybe' IO (Messages GhcMessage, Maybe a)
    ioA = do
        (msgs, mb_r) <- IO (Messages GhcMessage, Maybe a)
    -> Hsc (Messages GhcMessage, Maybe a)
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO (Messages GhcMessage, Maybe a)
     -> Hsc (Messages GhcMessage, Maybe a))
    -> IO (Messages GhcMessage, Maybe a)
    -> Hsc (Messages GhcMessage, Maybe a)
    forall a b. (a -> b) -> a -> b
    $ IO (Messages GhcMessage, Maybe a)
    ioA
        logDiagnostics (mkMessages $ getWarningMessages msgs)
        return mb_r

    -- -----------------------------------------------------------------------------
    -- | Lookup things in the compiler's environment

    hscTcRnLookupRdrName :: HscEnv -> LocatedN RdrName -> IO (NonEmpty Name)
    hscTcRnLookupRdrName :: HscEnv -> LocatedN RdrName -> IO (NonEmpty Name)
    hscTcRnLookupRdrName HscEnv
    hsc_env0 LocatedN RdrName
    rdr_name
      = HscEnv -> Hsc (NonEmpty Name) -> IO (NonEmpty Name)
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env0 (Hsc (NonEmpty Name) -> IO (NonEmpty Name))
    -> Hsc (NonEmpty Name) -> IO (NonEmpty Name)
    forall a b. (a -> b) -> a -> b
    $
        do { hsc_env <- Hsc HscEnv
    getHscEnv
           -- tcRnLookupRdrName can return empty list only together with TcRnUnknownMessage.
           -- Once errors has been dealt with in hoistTcRnMessage, we can enforce
           -- this invariant in types by converting to NonEmpty.
           ; ioMsgMaybe $ fmap (fmap (>>= NE.nonEmpty)) $ hoistTcRnMessage $
              tcRnLookupRdrName hsc_env rdr_name }

    hscTcRcLookupName :: HscEnv -> Name -> IO (Maybe TyThing)
    hscTcRcLookupName :: HscEnv -> Name -> IO (Maybe TyThing)
    hscTcRcLookupName HscEnv
    hsc_env0 Name
    name = HscEnv -> Hsc (Maybe TyThing) -> IO (Maybe TyThing)
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env0 (Hsc (Maybe TyThing) -> IO (Maybe TyThing))
    -> Hsc (Maybe TyThing) -> IO (Maybe TyThing)
    forall a b. (a -> b) -> a -> b
    $ do
      hsc_env <- Hsc HscEnv
    getHscEnv
      ioMsgMaybe' $ hoistTcRnMessage $ tcRnLookupName hsc_env name
          -- ignore errors: the only error we're likely to get is
          -- "name not found", and the Maybe in the return type
          -- is used to indicate that.

    hscTcRnGetInfo :: HscEnv -> Name
                   -> IO (Maybe (TyThing, Fixity, [ClsInst], [FamInst], SDoc))
    hscTcRnGetInfo :: HscEnv
    -> Name -> IO (Maybe (TyThing, Fixity, [ClsInst], [FamInst], SDoc))
    hscTcRnGetInfo HscEnv
    hsc_env0 Name
    name
      = HscEnv
    -> Hsc (Maybe (TyThing, Fixity, [ClsInst], [FamInst], SDoc))
    -> IO (Maybe (TyThing, Fixity, [ClsInst], [FamInst], SDoc))
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env0 (Hsc (Maybe (TyThing, Fixity, [ClsInst], [FamInst], SDoc))
     -> IO (Maybe (TyThing, Fixity, [ClsInst], [FamInst], SDoc)))
    -> Hsc (Maybe (TyThing, Fixity, [ClsInst], [FamInst], SDoc))
    -> IO (Maybe (TyThing, Fixity, [ClsInst], [FamInst], SDoc))
    forall a b. (a -> b) -> a -> b
    $
        do { hsc_env <- Hsc HscEnv
    getHscEnv
           ; ioMsgMaybe' $ hoistTcRnMessage $ tcRnGetInfo hsc_env name }

    hscIsGHCiMonad :: HscEnv -> String -> IO Name
    hscIsGHCiMonad :: HscEnv -> [Char] -> IO Name
    hscIsGHCiMonad HscEnv
    hsc_env [Char]
    name
      = HscEnv -> Hsc Name -> IO Name
    forall a. HscEnv -> Hsc a -> IO a
    runHsc HscEnv
    hsc_env (Hsc Name -> IO Name) -> Hsc Name -> IO Name
    forall a b. (a -> b) -> a -> b
    $ IO (Messages GhcMessage, Maybe Name) -> Hsc Name
    forall a. IO (Messages GhcMessage, Maybe a) -> Hsc a
    ioMsgMaybe (IO (Messages GhcMessage, Maybe Name) -> Hsc Name)
    -> IO (Messages GhcMessage, Maybe Name) -> Hsc Name
    forall a b. (a -> b) -> a -> b
    $ IO (Messages TcRnMessage, Maybe Name)
    -> IO (Messages GhcMessage, Maybe Name)
    forall (m :: * -> *) a.
    Monad m =>
    m (Messages TcRnMessage, a) -> m (Messages GhcMessage, a)
    hoistTcRnMessage (IO (Messages TcRnMessage, Maybe Name)
     -> IO (Messages GhcMessage, Maybe Name))
    -> IO (Messages TcRnMessage, Maybe Name)
    -> IO (Messages GhcMessage, Maybe Name)
    forall a b. (a -> b) -> a -> b
    $ HscEnv -> [Char] -> IO (Messages TcRnMessage, Maybe Name)
    isGHCiMonad HscEnv
    hsc_env [Char]
    name

    hscGetModuleInterface :: HscEnv -> Module -> IO ModIface
    hscGetModuleInterface :: HscEnv -> Module -> IO ModIface
    hscGetModuleInterface HscEnv
    hsc_env0 Module
    mod = HscEnv -> Hsc ModIface -> IO ModIface
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env0 (Hsc ModIface -> IO ModIface) -> Hsc ModIface -> IO ModIface
    forall a b. (a -> b) -> a -> b
    $ do
      hsc_env <- Hsc HscEnv
    getHscEnv
      ioMsgMaybe $ hoistTcRnMessage $ getModuleInterface hsc_env mod

    -- -----------------------------------------------------------------------------
    -- | Rename some import declarations
    hscRnImportDecls :: HscEnv -> [LImportDecl GhcPs] -> IO GlobalRdrEnv
    hscRnImportDecls :: HscEnv -> [LImportDecl GhcPs] -> IO GlobalRdrEnv
    hscRnImportDecls HscEnv
    hsc_env0 [LImportDecl GhcPs]
    import_decls = HscEnv -> Hsc GlobalRdrEnv -> IO GlobalRdrEnv
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env0 (Hsc GlobalRdrEnv -> IO GlobalRdrEnv)
    -> Hsc GlobalRdrEnv -> IO GlobalRdrEnv
    forall a b. (a -> b) -> a -> b
    $ do
      hsc_env <- Hsc HscEnv
    getHscEnv
      ioMsgMaybe $ hoistTcRnMessage $ tcRnImportDecls hsc_env import_decls

    -- -----------------------------------------------------------------------------
    -- | parse a file, returning the abstract syntax

    hscParse :: HscEnv -> ModSummary -> IO HsParsedModule
    hscParse :: HscEnv -> ModSummary -> IO HsParsedModule
    hscParse HscEnv
    hsc_env ModSummary
    mod_summary = HscEnv -> Hsc HsParsedModule -> IO HsParsedModule
    forall a. HscEnv -> Hsc a -> IO a
    runHsc HscEnv
    hsc_env (Hsc HsParsedModule -> IO HsParsedModule)
    -> Hsc HsParsedModule -> IO HsParsedModule
    forall a b. (a -> b) -> a -> b
    $ ModSummary -> Hsc HsParsedModule
    hscParse' ModSummary
    mod_summary

    -- internal version, that doesn't fail due to -Werror
    hscParse' :: ModSummary -> Hsc HsParsedModule
    hscParse' :: ModSummary -> Hsc HsParsedModule
    hscParse' ModSummary
    mod_summary
     | Just HsParsedModule
    r <- ModSummary -> Maybe HsParsedModule
    ms_parsed_mod ModSummary
    mod_summary = HsParsedModule -> Hsc HsParsedModule
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return HsParsedModule
    r
     | Bool
    otherwise = do
        dflags <- Hsc DynFlags
    forall (m :: * -> *). HasDynFlags m => m DynFlags
    getDynFlags
        logger <- getLogger
        {-# SCC "Parser" #-} withTiming logger
                    (text "Parser"<+>brackets (ppr $ ms_mod mod_summary))
                    (const ()) $ do
        let src_filename  = ModSummary -> [Char]
    ms_hspp_file ModSummary
    mod_summary
            maybe_src_buf = ModSummary -> Maybe StringBuffer
    ms_hspp_buf  ModSummary
    mod_summary

        --------------------------  Parser  ----------------
        -- sometimes we already have the buffer in memory, perhaps
        -- because we needed to parse the imports out of it, or get the
        -- module name.
        buf <- case maybe_src_buf of
                   Just StringBuffer
    b  -> StringBuffer -> Hsc StringBuffer
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return StringBuffer
    b
                   Maybe StringBuffer
    Nothing -> IO StringBuffer -> Hsc StringBuffer
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO StringBuffer -> Hsc StringBuffer)
    -> IO StringBuffer -> Hsc StringBuffer
    forall a b. (a -> b) -> a -> b
    $ [Char] -> IO StringBuffer
    hGetStringBuffer [Char]
    src_filename

        let loc = FastString -> TypeIndex -> TypeIndex -> RealSrcLoc
    mkRealSrcLoc ([Char] -> FastString
    mkFastString [Char]
    src_filename) TypeIndex
    1 TypeIndex
    1

        let diag_opts = DynFlags -> DiagOpts
    initDiagOpts DynFlags
    dflags
        when (wopt Opt_WarnUnicodeBidirectionalFormatCharacters dflags) $ do
          case checkBidirectionFormatChars (PsLoc loc (BufPos 0)) buf of
            Maybe (NonEmpty (PsLoc, Char, [Char]))
    Nothing -> () -> Hsc ()
    forall a. a -> Hsc a
    forall (f :: * -> *) a. Applicative f => a -> f a
    pure ()
            Just chars :: NonEmpty (PsLoc, Char, [Char])
    chars@((PsLoc
    eloc,Char
    chr,[Char]
    _) :| [(PsLoc, Char, [Char])]
    _) ->
              let span :: SrcSpan
    span = PsSpan -> SrcSpan
    mkSrcSpanPs (PsSpan -> SrcSpan) -> PsSpan -> SrcSpan
    forall a b. (a -> b) -> a -> b
    $ PsLoc -> PsLoc -> PsSpan
    mkPsSpan PsLoc
    eloc (PsLoc -> Char -> PsLoc
    advancePsLoc PsLoc
    eloc Char
    chr)
              in Messages GhcMessage -> Hsc ()
    logDiagnostics (Messages GhcMessage -> Hsc ()) -> Messages GhcMessage -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ MsgEnvelope GhcMessage -> Messages GhcMessage
    forall e. MsgEnvelope e -> Messages e
    singleMessage (MsgEnvelope GhcMessage -> Messages GhcMessage)
    -> MsgEnvelope GhcMessage -> Messages GhcMessage
    forall a b. (a -> b) -> a -> b
    $
                   DiagOpts -> SrcSpan -> GhcMessage -> MsgEnvelope GhcMessage
    forall e. Diagnostic e => DiagOpts -> SrcSpan -> e -> MsgEnvelope e
    mkPlainMsgEnvelope DiagOpts
    diag_opts SrcSpan
    span (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $
                   PsWarning -> GhcMessage
    GhcPsMessage (PsWarning -> GhcMessage) -> PsWarning -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ NonEmpty (PsLoc, Char, [Char]) -> PsWarning
    PsWarnBidirectionalFormatChars NonEmpty (PsLoc, Char, [Char])
    chars

        let parseMod | HscSource
    HsigFile HscSource -> HscSource -> Bool
    forall a. Eq a => a -> a -> Bool
    == ModSummary -> HscSource
    ms_hsc_src ModSummary
    mod_summary
                     = P (Located (HsModule GhcPs))
    parseSignature
                     | Bool
    otherwise = P (Located (HsModule GhcPs))
    parseModule

        case unP parseMod (initParserState (initParserOpts dflags) buf loc) of
            PFailed PState
    pst ->
                (Messages PsWarning, Messages PsWarning) -> Hsc HsParsedModule
    forall a. (Messages PsWarning, Messages PsWarning) -> Hsc a
    handleWarningsThrowErrors (PState -> (Messages PsWarning, Messages PsWarning)
    getPsMessages PState
    pst)
            POk PState
    pst Located (HsModule GhcPs)
    rdr_module -> do
                IO () -> Hsc ()
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO () -> Hsc ()) -> IO () -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_dump_parsed [Char]
    "Parser"
                            DumpFormat
    FormatHaskell (Located (HsModule GhcPs) -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Located (HsModule GhcPs)
    rdr_module)
                IO () -> Hsc ()
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO () -> Hsc ()) -> IO () -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_dump_parsed_ast [Char]
    "Parser AST"
                            DumpFormat
    FormatHaskell (BlankSrcSpan
    -> BlankEpAnnotations -> Located (HsModule GhcPs) -> SDoc
    forall a. Data a => BlankSrcSpan -> BlankEpAnnotations -> a -> SDoc
    showAstData BlankSrcSpan
    NoBlankSrcSpan
                                                       BlankEpAnnotations
    NoBlankEpAnnotations
                                                       Located (HsModule GhcPs)
    rdr_module)
                IO () -> Hsc ()
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO () -> Hsc ()) -> IO () -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_source_stats [Char]
    "Source Statistics"
                            DumpFormat
    FormatText (Bool -> Located (HsModule GhcPs) -> SDoc
    ppSourceStats Bool
    False Located (HsModule GhcPs)
    rdr_module)

                -- To get the list of extra source files, we take the list
                -- that the parser gave us,
                --   - eliminate files beginning with '<'.  gcc likes to use
                --     pseudo-filenames like "<built-in>" and "<command-line>"
                --   - normalise them (eliminate differences between ./f and f)
                --   - filter out the preprocessed source file
                --   - filter out anything beginning with tmpdir
                --   - remove duplicates
                --   - filter out the .hs/.lhs source filename if we have one
                --
                let n_hspp :: [Char]
    n_hspp  = [Char] -> [Char]
    FilePath.normalise [Char]
    src_filename
                    TempDir [Char]
    tmp_dir = DynFlags -> TempDir
    tmpDir DynFlags
    dflags
                    srcs0 :: [[Char]]
    srcs0 = [[Char]] -> [[Char]]
    forall a. Eq a => [a] -> [a]
    nub ([[Char]] -> [[Char]]) -> [[Char]] -> [[Char]]
    forall a b. (a -> b) -> a -> b
    $ ([Char] -> Bool) -> [[Char]] -> [[Char]]
    forall a. (a -> Bool) -> [a] -> [a]
    filter (Bool -> Bool
    not (Bool -> Bool) -> ([Char] -> Bool) -> [Char] -> Bool
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . ([Char]
    tmp_dir [Char] -> [Char] -> Bool
    forall a. Eq a => [a] -> [a] -> Bool
    `isPrefixOf`))
                                ([[Char]] -> [[Char]]) -> [[Char]] -> [[Char]]
    forall a b. (a -> b) -> a -> b
    $ ([Char] -> Bool) -> [[Char]] -> [[Char]]
    forall a. (a -> Bool) -> [a] -> [a]
    filter (Bool -> Bool
    not (Bool -> Bool) -> ([Char] -> Bool) -> [Char] -> Bool
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . ([Char] -> [Char] -> Bool
    forall a. Eq a => a -> a -> Bool
    == [Char]
    n_hspp))
                                ([[Char]] -> [[Char]]) -> [[Char]] -> [[Char]]
    forall a b. (a -> b) -> a -> b
    $ ([Char] -> [Char]) -> [[Char]] -> [[Char]]
    forall a b. (a -> b) -> [a] -> [b]
    map [Char] -> [Char]
    FilePath.normalise
                                ([[Char]] -> [[Char]]) -> [[Char]] -> [[Char]]
    forall a b. (a -> b) -> a -> b
    $ ([Char] -> Bool) -> [[Char]] -> [[Char]]
    forall a. (a -> Bool) -> [a] -> [a]
    filter (Bool -> Bool
    not (Bool -> Bool) -> ([Char] -> Bool) -> [Char] -> Bool
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . [Char] -> [Char] -> Bool
    forall a. Eq a => [a] -> [a] -> Bool
    isPrefixOf [Char]
    "<")
                                ([[Char]] -> [[Char]]) -> [[Char]] -> [[Char]]
    forall a b. (a -> b) -> a -> b
    $ (FastString -> [Char]) -> [FastString] -> [[Char]]
    forall a b. (a -> b) -> [a] -> [b]
    map FastString -> [Char]
    unpackFS
                                ([FastString] -> [[Char]]) -> [FastString] -> [[Char]]
    forall a b. (a -> b) -> a -> b
    $ PState -> [FastString]
    srcfiles PState
    pst
                    srcs1 :: [[Char]]
    srcs1 = case ModLocation -> Maybe [Char]
    ml_hs_file (ModSummary -> ModLocation
    ms_location ModSummary
    mod_summary) of
                              Just [Char]
    f  -> ([Char] -> Bool) -> [[Char]] -> [[Char]]
    forall a. (a -> Bool) -> [a] -> [a]
    filter ([Char] -> [Char] -> Bool
    forall a. Eq a => a -> a -> Bool
    /= [Char] -> [Char]
    FilePath.normalise [Char]
    f) [[Char]]
    srcs0
                              Maybe [Char]
    Nothing -> [[Char]]
    srcs0

                -- sometimes we see source files from earlier
                -- preprocessing stages that cannot be found, so just
                -- filter them out:
                srcs2 <- IO [[Char]] -> Hsc [[Char]]
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO [[Char]] -> Hsc [[Char]]) -> IO [[Char]] -> Hsc [[Char]]
    forall a b. (a -> b) -> a -> b
    $ ([Char] -> IO Bool) -> [[Char]] -> IO [[Char]]
    forall (m :: * -> *) a.
    Applicative m =>
    (a -> m Bool) -> [a] -> m [a]
    filterM [Char] -> IO Bool
    doesFileExist [[Char]]
    srcs1

                let res = HsParsedModule {
                          hpm_module :: Located (HsModule GhcPs)
    hpm_module    = Located (HsModule GhcPs)
    rdr_module,
                          hpm_src_files :: [[Char]]
    hpm_src_files = [[Char]]
    srcs2
                       }

                -- apply parse transformation of plugins
                let applyPluginAction Plugin
    p [[Char]]
    opts
                      = Plugin
    -> [[Char]] -> ModSummary -> ParsedResult -> Hsc ParsedResult
    parsedResultAction Plugin
    p [[Char]]
    opts ModSummary
    mod_summary
                hsc_env <- getHscEnv
                (ParsedResult transformed (PsMessages warns errs)) <-
                  withPlugins (hsc_plugins hsc_env) applyPluginAction
                    (ParsedResult res (uncurry PsMessages $ getPsMessages pst))

                logDiagnostics (GhcPsMessage <$> warns)
                unless (isEmptyMessages errs) $ throwErrors (GhcPsMessage <$> errs)

                return transformed

    checkBidirectionFormatChars :: PsLoc -> StringBuffer -> Maybe (NonEmpty (PsLoc, Char, String))
    checkBidirectionFormatChars :: PsLoc -> StringBuffer -> Maybe (NonEmpty (PsLoc, Char, [Char]))
    checkBidirectionFormatChars PsLoc
    start_loc StringBuffer
    sb
      | StringBuffer -> Bool
    containsBidirectionalFormatChar StringBuffer
    sb = NonEmpty (PsLoc, Char, [Char])
    -> Maybe (NonEmpty (PsLoc, Char, [Char]))
    forall a. a -> Maybe a
    Just (NonEmpty (PsLoc, Char, [Char])
     -> Maybe (NonEmpty (PsLoc, Char, [Char])))
    -> NonEmpty (PsLoc, Char, [Char])
    -> Maybe (NonEmpty (PsLoc, Char, [Char]))
    forall a b. (a -> b) -> a -> b
    $ PsLoc -> StringBuffer -> NonEmpty (PsLoc, Char, [Char])
    go PsLoc
    start_loc StringBuffer
    sb
      | Bool
    otherwise = Maybe (NonEmpty (PsLoc, Char, [Char]))
    forall a. Maybe a
    Nothing
      where
        go :: PsLoc -> StringBuffer -> NonEmpty (PsLoc, Char, String)
        go :: PsLoc -> StringBuffer -> NonEmpty (PsLoc, Char, [Char])
    go PsLoc
    loc StringBuffer
    sb
          | StringBuffer -> Bool
    atEnd StringBuffer
    sb = [Char] -> NonEmpty (PsLoc, Char, [Char])
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "checkBidirectionFormatChars: no char found"
          | Bool
    otherwise = case StringBuffer -> (Char, StringBuffer)
    nextChar StringBuffer
    sb of
              (Char
    chr, StringBuffer
    sb)
                | Just [Char]
    desc <- Char -> [(Char, [Char])] -> Maybe [Char]
    forall a b. Eq a => a -> [(a, b)] -> Maybe b
    lookup Char
    chr [(Char, [Char])]
    bidirectionalFormatChars ->
                    (PsLoc
    loc, Char
    chr, [Char]
    desc) (PsLoc, Char, [Char])
    -> [(PsLoc, Char, [Char])] -> NonEmpty (PsLoc, Char, [Char])
    forall a. a -> [a] -> NonEmpty a
    :| PsLoc -> StringBuffer -> [(PsLoc, Char, [Char])]
    go1 (PsLoc -> Char -> PsLoc
    advancePsLoc PsLoc
    loc Char
    chr) StringBuffer
    sb
                | Bool
    otherwise -> PsLoc -> StringBuffer -> NonEmpty (PsLoc, Char, [Char])
    go (PsLoc -> Char -> PsLoc
    advancePsLoc PsLoc
    loc Char
    chr) StringBuffer
    sb

        go1 :: PsLoc -> StringBuffer -> [(PsLoc, Char, String)]
        go1 :: PsLoc -> StringBuffer -> [(PsLoc, Char, [Char])]
    go1 PsLoc
    loc StringBuffer
    sb
          | StringBuffer -> Bool
    atEnd StringBuffer
    sb = []
          | Bool
    otherwise = case StringBuffer -> (Char, StringBuffer)
    nextChar StringBuffer
    sb of
              (Char
    chr, StringBuffer
    sb)
                | Just [Char]
    desc <- Char -> [(Char, [Char])] -> Maybe [Char]
    forall a b. Eq a => a -> [(a, b)] -> Maybe b
    lookup Char
    chr [(Char, [Char])]
    bidirectionalFormatChars ->
                    (PsLoc
    loc, Char
    chr, [Char]
    desc) (PsLoc, Char, [Char])
    -> [(PsLoc, Char, [Char])] -> [(PsLoc, Char, [Char])]
    forall a. a -> [a] -> [a]
    : PsLoc -> StringBuffer -> [(PsLoc, Char, [Char])]
    go1 (PsLoc -> Char -> PsLoc
    advancePsLoc PsLoc
    loc Char
    chr) StringBuffer
    sb
                | Bool
    otherwise -> PsLoc -> StringBuffer -> [(PsLoc, Char, [Char])]
    go1 (PsLoc -> Char -> PsLoc
    advancePsLoc PsLoc
    loc Char
    chr) StringBuffer
    sb

    -- -----------------------------------------------------------------------------
    -- | If the renamed source has been kept, extract it. Dump it if requested.

    extract_renamed_stuff :: ModSummary -> TcGblEnv -> Hsc RenamedStuff
    extract_renamed_stuff :: ModSummary -> TcGblEnv -> Hsc RenamedStuff
    extract_renamed_stuff ModSummary
    mod_summary TcGblEnv
    tc_result = do
        let rn_info :: RenamedStuff
    rn_info = TcGblEnv -> RenamedStuff
    getRenamedStuff TcGblEnv
    tc_result

        dflags <- Hsc DynFlags
    forall (m :: * -> *). HasDynFlags m => m DynFlags
    getDynFlags
        logger <- getLogger
        liftIO $ putDumpFileMaybe logger Opt_D_dump_rn_ast "Renamer"
                    FormatHaskell (showAstData NoBlankSrcSpan NoBlankEpAnnotations rn_info)

        -- Create HIE files
        when (gopt Opt_WriteHie dflags) $ do
            -- I assume this fromJust is safe because `-fwrite-hie-file`
            -- enables the option which keeps the renamed source.
            hieFile <- mkHieFile mod_summary tc_result (fromJust rn_info)
            let out_file = ModLocation -> [Char]
    ml_hie_file (ModLocation -> [Char]) -> ModLocation -> [Char]
    forall a b. (a -> b) -> a -> b
    $ ModSummary -> ModLocation
    ms_location ModSummary
    mod_summary
            liftIO $ writeHieFile out_file hieFile
            liftIO $ putDumpFileMaybe logger Opt_D_dump_hie "HIE AST" FormatHaskell (ppr $ hie_asts hieFile)

            -- Validate HIE files
            when (gopt Opt_ValidateHie dflags) $ do
                hs_env <- getHscEnv
                liftIO $ do
                  -- Validate Scopes
                  case validateScopes (hie_module hieFile) $ getAsts $ hie_asts hieFile of
                      [] -> Logger -> SDoc -> IO ()
    putMsg Logger
    logger (SDoc -> IO ()) -> SDoc -> IO ()
    forall a b. (a -> b) -> a -> b
    $ [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "Got valid scopes"
                      [SDoc]
    xs -> do
                        Logger -> SDoc -> IO ()
    putMsg Logger
    logger (SDoc -> IO ()) -> SDoc -> IO ()
    forall a b. (a -> b) -> a -> b
    $ [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "Got invalid scopes"
                        (SDoc -> IO ()) -> [SDoc] -> IO ()
    forall (t :: * -> *) (m :: * -> *) a b.
    (Foldable t, Monad m) =>
    (a -> m b) -> t a -> m ()
    mapM_ (Logger -> SDoc -> IO ()
    putMsg Logger
    logger) [SDoc]
    xs
                  -- Roundtrip testing
                  file' <- readHieFile (hsc_NC hs_env) out_file
                  case diffFile hieFile (hie_file_result file') of
                    [] ->
                      Logger -> SDoc -> IO ()
    putMsg Logger
    logger (SDoc -> IO ()) -> SDoc -> IO ()
    forall a b. (a -> b) -> a -> b
    $ [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "Got no roundtrip errors"
                    [SDoc]
    xs -> do
                      Logger -> SDoc -> IO ()
    putMsg Logger
    logger (SDoc -> IO ()) -> SDoc -> IO ()
    forall a b. (a -> b) -> a -> b
    $ [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "Got roundtrip errors"
                      let logger' :: Logger
    logger' = Logger -> (LogFlags -> LogFlags) -> Logger
    updateLogFlags Logger
    logger (DumpFlag -> LogFlags -> LogFlags
    log_set_dopt DumpFlag
    Opt_D_ppr_debug)
                      (SDoc -> IO ()) -> [SDoc] -> IO ()
    forall (t :: * -> *) (m :: * -> *) a b.
    (Foldable t, Monad m) =>
    (a -> m b) -> t a -> m ()
    mapM_ (Logger -> SDoc -> IO ()
    putMsg Logger
    logger') [SDoc]
    xs
        return rn_info

    -- -----------------------------------------------------------------------------
    -- | Rename and typecheck a module, additionally returning the renamed syntax
    hscTypecheckRename :: HscEnv -> ModSummary -> HsParsedModule
                       -> IO (TcGblEnv, RenamedStuff)
    hscTypecheckRename :: HscEnv
    -> ModSummary -> HsParsedModule -> IO (TcGblEnv, RenamedStuff)
    hscTypecheckRename HscEnv
    hsc_env ModSummary
    mod_summary HsParsedModule
    rdr_module =
        ((TcGblEnv,
      Maybe
        (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
         Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
         Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName))),
     Messages GhcMessage)
    -> (TcGblEnv,
        Maybe
          (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
           Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
           Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName)))
    forall a b. (a, b) -> a
    fst (((TcGblEnv,
       Maybe
         (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
          Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
          Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName))),
      Messages GhcMessage)
     -> (TcGblEnv,
         Maybe
           (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
            Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
            Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName))))
    -> IO
         ((TcGblEnv,
           Maybe
             (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
              Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
              Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName))),
          Messages GhcMessage)
    -> IO
         (TcGblEnv,
          Maybe
            (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
             Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
             Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName)))
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> HscEnv
    -> ModSummary
    -> HsParsedModule
    -> IO ((TcGblEnv, RenamedStuff), Messages GhcMessage)
    hscTypecheckRenameWithDiagnostics HscEnv
    hsc_env ModSummary
    mod_summary HsParsedModule
    rdr_module

    -- | Rename and typecheck a module, additionally returning the renamed syntax
    -- and the diagnostics produced.
    hscTypecheckRenameWithDiagnostics :: HscEnv -> ModSummary -> HsParsedModule
                                      -> IO ((TcGblEnv, RenamedStuff), Messages GhcMessage)
    hscTypecheckRenameWithDiagnostics :: HscEnv
    -> ModSummary
    -> HsParsedModule
    -> IO ((TcGblEnv, RenamedStuff), Messages GhcMessage)
    hscTypecheckRenameWithDiagnostics HscEnv
    hsc_env ModSummary
    mod_summary HsParsedModule
    rdr_module = HscEnv
    -> Hsc (TcGblEnv, RenamedStuff)
    -> IO ((TcGblEnv, RenamedStuff), Messages GhcMessage)
    forall a. HscEnv -> Hsc a -> IO (a, Messages GhcMessage)
    runHsc' HscEnv
    hsc_env (Hsc (TcGblEnv, RenamedStuff)
     -> IO ((TcGblEnv, RenamedStuff), Messages GhcMessage))
    -> Hsc (TcGblEnv, RenamedStuff)
    -> IO ((TcGblEnv, RenamedStuff), Messages GhcMessage)
    forall a b. (a -> b) -> a -> b
    $
        Bool
    -> ModSummary
    -> Maybe HsParsedModule
    -> Hsc (TcGblEnv, RenamedStuff)
    hsc_typecheck Bool
    True ModSummary
    mod_summary (HsParsedModule -> Maybe HsParsedModule
    forall a. a -> Maybe a
    Just HsParsedModule
    rdr_module)

    -- | Do Typechecking without throwing SourceError exception with -Werror
    hscTypecheckAndGetWarnings :: HscEnv ->  ModSummary -> IO (FrontendResult, WarningMessages)
    hscTypecheckAndGetWarnings :: HscEnv -> ModSummary -> IO (FrontendResult, Messages GhcMessage)
    hscTypecheckAndGetWarnings HscEnv
    hsc_env ModSummary
    summary = HscEnv
    -> Hsc FrontendResult -> IO (FrontendResult, Messages GhcMessage)
    forall a. HscEnv -> Hsc a -> IO (a, Messages GhcMessage)
    runHsc' HscEnv
    hsc_env (Hsc FrontendResult -> IO (FrontendResult, Messages GhcMessage))
    -> Hsc FrontendResult -> IO (FrontendResult, Messages GhcMessage)
    forall a b. (a -> b) -> a -> b
    $ do
      case Hooks -> Maybe (ModSummary -> Hsc FrontendResult)
    hscFrontendHook (HscEnv -> Hooks
    hsc_hooks HscEnv
    hsc_env) of
        Maybe (ModSummary -> Hsc FrontendResult)
    Nothing -> TcGblEnv -> FrontendResult
    FrontendTypecheck (TcGblEnv -> FrontendResult)
    -> ((TcGblEnv,
         Maybe
           (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
            Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
            Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName)))
        -> TcGblEnv)
    -> (TcGblEnv,
        Maybe
          (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
           Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
           Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName)))
    -> FrontendResult
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . (TcGblEnv,
     Maybe
       (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
        Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
        Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName)))
    -> TcGblEnv
    forall a b. (a, b) -> a
    fst ((TcGblEnv,
      Maybe
        (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
         Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
         Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName)))
     -> FrontendResult)
    -> Hsc
         (TcGblEnv,
          Maybe
            (HsGroup GhcRn, [GenLocated SrcSpanAnnA (ImportDecl GhcRn)],
             Maybe [(GenLocated SrcSpanAnnA (IE GhcRn), Avails)],
             Maybe (LHsDoc GhcRn), Maybe (GenLocated SrcSpanAnnA ModuleName)))
    -> Hsc FrontendResult
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> Bool
    -> ModSummary
    -> Maybe HsParsedModule
    -> Hsc (TcGblEnv, RenamedStuff)
    hsc_typecheck Bool
    False ModSummary
    summary Maybe HsParsedModule
    forall a. Maybe a
    Nothing
        Just ModSummary -> Hsc FrontendResult
    h  -> ModSummary -> Hsc FrontendResult
    h ModSummary
    summary

    -- | A bunch of logic piled around @tcRnModule'@, concerning a) backpack
    -- b) concerning dumping rename info and hie files. It would be nice to further
    -- separate this stuff out, probably in conjunction better separating renaming
    -- and type checking (#17781).
    hsc_typecheck :: Bool -- ^ Keep renamed source?
                  -> ModSummary -> Maybe HsParsedModule
                  -> Hsc (TcGblEnv, RenamedStuff)
    hsc_typecheck :: Bool
    -> ModSummary
    -> Maybe HsParsedModule
    -> Hsc (TcGblEnv, RenamedStuff)
    hsc_typecheck Bool
    keep_rn ModSummary
    mod_summary Maybe HsParsedModule
    mb_rdr_module = do
        hsc_env <- Hsc HscEnv
    getHscEnv
        let hsc_src = ModSummary -> HscSource
    ms_hsc_src ModSummary
    mod_summary
            dflags = HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env
            home_unit = HscEnv -> HomeUnit
    hsc_home_unit HscEnv
    hsc_env
            outer_mod = ModSummary -> Module
    ms_mod ModSummary
    mod_summary
            mod_name = Module -> ModuleName
    forall unit. GenModule unit -> ModuleName
    moduleName Module
    outer_mod
            outer_mod' = HomeUnit -> ModuleName -> Module
    mkHomeModule HomeUnit
    home_unit ModuleName
    mod_name
            inner_mod = HomeUnit -> ModuleName -> Module
    homeModuleNameInstantiation HomeUnit
    home_unit ModuleName
    mod_name
            src_filename  = ModSummary -> [Char]
    ms_hspp_file ModSummary
    mod_summary
            real_loc = RealSrcLoc -> RealSrcSpan
    realSrcLocSpan (RealSrcLoc -> RealSrcSpan) -> RealSrcLoc -> RealSrcSpan
    forall a b. (a -> b) -> a -> b
    $ FastString -> TypeIndex -> TypeIndex -> RealSrcLoc
    mkRealSrcLoc ([Char] -> FastString
    mkFastString [Char]
    src_filename) TypeIndex
    1 TypeIndex
    1
            keep_rn' = GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_WriteHie DynFlags
    dflags Bool -> Bool -> Bool
    || Bool
    keep_rn
        massert (isHomeModule home_unit outer_mod)
        tc_result <- if hsc_src == HsigFile && not (isHoleModule inner_mod)
            then ioMsgMaybe $ hoistTcRnMessage $ tcRnInstantiateSignature hsc_env outer_mod' real_loc
            else
             do hpm <- case mb_rdr_module of
                        Just HsParsedModule
    hpm -> HsParsedModule -> Hsc HsParsedModule
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return HsParsedModule
    hpm
                        Maybe HsParsedModule
    Nothing -> ModSummary -> Hsc HsParsedModule
    hscParse' ModSummary
    mod_summary
                tc_result0 <- tcRnModule' mod_summary keep_rn' hpm
                if hsc_src == HsigFile
                    then do (iface, _) <- liftIO $ hscSimpleIface hsc_env Nothing tc_result0 mod_summary
                            ioMsgMaybe $ hoistTcRnMessage $
                                tcRnMergeSignatures hsc_env hpm tc_result0 iface
                    else return tc_result0
        -- TODO are we extracting anything when we merely instantiate a signature?
        -- If not, try to move this into the "else" case above.
        rn_info <- extract_renamed_stuff mod_summary tc_result
        return (tc_result, rn_info)

    -- wrapper around tcRnModule to handle safe haskell extras
    tcRnModule' :: ModSummary -> Bool -> HsParsedModule
                -> Hsc TcGblEnv
    tcRnModule' :: ModSummary -> Bool -> HsParsedModule -> Hsc TcGblEnv
    tcRnModule' ModSummary
    sum Bool
    save_rn_syntax HsParsedModule
    mod = do
        hsc_env <- Hsc HscEnv
    getHscEnv
        dflags  <- getDynFlags

        let diag_opts = DynFlags -> DiagOpts
    initDiagOpts DynFlags
    dflags
        -- -Wmissing-safe-haskell-mode
        when (not (safeHaskellModeEnabled dflags)
              && wopt Opt_WarnMissingSafeHaskellMode dflags) $
            logDiagnostics $ singleMessage $
            mkPlainMsgEnvelope diag_opts (getLoc (hpm_module mod)) $
            GhcDriverMessage $ DriverMissingSafeHaskellMode (ms_mod sum)

        tcg_res <- {-# SCC "Typecheck-Rename" #-}
                   ioMsgMaybe $ hoistTcRnMessage $
                       tcRnModule hsc_env sum
                         save_rn_syntax mod

        -- See Note [Safe Haskell Overlapping Instances Implementation]
        -- although this is used for more than just that failure case.
        tcSafeOK <- liftIO $ readIORef (tcg_safe_infer tcg_res)
        whyUnsafe <- liftIO $ readIORef (tcg_safe_infer_reasons tcg_res)
        let allSafeOK = DynFlags -> Bool
    safeInferred DynFlags
    dflags Bool -> Bool -> Bool
    && Bool
    tcSafeOK

        -- end of the safe haskell line, how to respond to user?
        if not (safeHaskellOn dflags)
             || (safeInferOn dflags && not allSafeOK)
          -- if safe Haskell off or safe infer failed, mark unsafe
          then markUnsafeInfer tcg_res whyUnsafe

          -- module (could be) safe, throw warning if needed
          else do
              tcg_res' <- hscCheckSafeImports tcg_res
              safe <- liftIO $ readIORef (tcg_safe_infer tcg_res')
              when safe $
                case wopt Opt_WarnSafe dflags of
                  Bool
    True
                    | DynFlags -> SafeHaskellMode
    safeHaskell DynFlags
    dflags SafeHaskellMode -> SafeHaskellMode -> Bool
    forall a. Eq a => a -> a -> Bool
    == SafeHaskellMode
    Sf_Safe -> () -> Hsc ()
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()
                    | Bool
    otherwise -> (Messages GhcMessage -> Hsc ()
    logDiagnostics (Messages GhcMessage -> Hsc ()) -> Messages GhcMessage -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ MsgEnvelope GhcMessage -> Messages GhcMessage
    forall e. MsgEnvelope e -> Messages e
    singleMessage (MsgEnvelope GhcMessage -> Messages GhcMessage)
    -> MsgEnvelope GhcMessage -> Messages GhcMessage
    forall a b. (a -> b) -> a -> b
    $
                           DiagOpts -> SrcSpan -> GhcMessage -> MsgEnvelope GhcMessage
    forall e. Diagnostic e => DiagOpts -> SrcSpan -> e -> MsgEnvelope e
    mkPlainMsgEnvelope DiagOpts
    diag_opts (DynFlags -> SrcSpan
    warnSafeOnLoc DynFlags
    dflags) (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $
                           DriverMessage -> GhcMessage
    GhcDriverMessage (DriverMessage -> GhcMessage) -> DriverMessage -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ Module -> DriverMessage
    DriverInferredSafeModule (TcGblEnv -> Module
    tcg_mod TcGblEnv
    tcg_res'))
                  Bool
    False | DynFlags -> SafeHaskellMode
    safeHaskell DynFlags
    dflags SafeHaskellMode -> SafeHaskellMode -> Bool
    forall a. Eq a => a -> a -> Bool
    == SafeHaskellMode
    Sf_Trustworthy Bool -> Bool -> Bool
    &&
                          WarningFlag -> DynFlags -> Bool
    wopt WarningFlag
    Opt_WarnTrustworthySafe DynFlags
    dflags ->
                          (Messages GhcMessage -> Hsc ()
    logDiagnostics (Messages GhcMessage -> Hsc ()) -> Messages GhcMessage -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ MsgEnvelope GhcMessage -> Messages GhcMessage
    forall e. MsgEnvelope e -> Messages e
    singleMessage (MsgEnvelope GhcMessage -> Messages GhcMessage)
    -> MsgEnvelope GhcMessage -> Messages GhcMessage
    forall a b. (a -> b) -> a -> b
    $
                           DiagOpts -> SrcSpan -> GhcMessage -> MsgEnvelope GhcMessage
    forall e. Diagnostic e => DiagOpts -> SrcSpan -> e -> MsgEnvelope e
    mkPlainMsgEnvelope DiagOpts
    diag_opts (DynFlags -> SrcSpan
    trustworthyOnLoc DynFlags
    dflags) (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $
                           DriverMessage -> GhcMessage
    GhcDriverMessage (DriverMessage -> GhcMessage) -> DriverMessage -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ Module -> DriverMessage
    DriverMarkedTrustworthyButInferredSafe (TcGblEnv -> Module
    tcg_mod TcGblEnv
    tcg_res'))
                  Bool
    False -> () -> Hsc ()
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()
              return tcg_res'

    -- | Convert a typechecked module to Core
    hscDesugar :: HscEnv -> ModSummary -> TcGblEnv -> IO ModGuts
    hscDesugar :: HscEnv -> ModSummary -> TcGblEnv -> IO ModGuts
    hscDesugar HscEnv
    hsc_env ModSummary
    mod_summary TcGblEnv
    tc_result =
        HscEnv -> Hsc ModGuts -> IO ModGuts
    forall a. HscEnv -> Hsc a -> IO a
    runHsc HscEnv
    hsc_env (Hsc ModGuts -> IO ModGuts) -> Hsc ModGuts -> IO ModGuts
    forall a b. (a -> b) -> a -> b
    $ ModLocation -> TcGblEnv -> Hsc ModGuts
    hscDesugar' (ModSummary -> ModLocation
    ms_location ModSummary
    mod_summary) TcGblEnv
    tc_result

    hscDesugar' :: ModLocation -> TcGblEnv -> Hsc ModGuts
    hscDesugar' :: ModLocation -> TcGblEnv -> Hsc ModGuts
    hscDesugar' ModLocation
    mod_location TcGblEnv
    tc_result = do
        hsc_env <- Hsc HscEnv
    getHscEnv
        ioMsgMaybe $ hoistDsMessage $
          {-# SCC "deSugar" #-}
          deSugar hsc_env mod_location tc_result

    -- | Make a 'ModDetails' from the results of typechecking. Used when
    -- typechecking only, as opposed to full compilation.
    makeSimpleDetails :: Logger -> TcGblEnv -> IO ModDetails
    makeSimpleDetails :: Logger -> TcGblEnv -> IO ModDetails
    makeSimpleDetails Logger
    logger TcGblEnv
    tc_result = Logger -> TcGblEnv -> IO ModDetails
    mkBootModDetailsTc Logger
    logger TcGblEnv
    tc_result

    {- **********************************************************************
    %*                                                                      *
                    The main compiler pipeline
    %*                                                                      *
    %********************************************************************* -}

    {-
                       --------------------------------
                            The compilation proper
                       --------------------------------

    It's the task of the compilation proper to compile Haskell, hs-boot and core
    files to either byte-code, hard-code (C, asm, LLVM, etc.) or to nothing at all
    (the module is still parsed and type-checked. This feature is mostly used by
    IDE's and the likes). Compilation can happen in either 'one-shot', 'batch',
    'nothing', or 'interactive' mode. 'One-shot' mode targets hard-code, 'batch'
    mode targets hard-code, 'nothing' mode targets nothing and 'interactive' mode
    targets byte-code.

    The modes are kept separate because of their different types and meanings:

     * In 'one-shot' mode, we're only compiling a single file and can therefore
     discard the new ModIface and ModDetails. This is also the reason it only
     targets hard-code; compiling to byte-code or nothing doesn't make sense when
     we discard the result.

     * 'Batch' mode is like 'one-shot' except that we keep the resulting ModIface
     and ModDetails. 'Batch' mode doesn't target byte-code since that require us to
     return the newly compiled byte-code.

     * 'Nothing' mode has exactly the same type as 'batch' mode but they're still
     kept separate. This is because compiling to nothing is fairly special: We
     don't output any interface files, we don't run the simplifier and we don't
     generate any code.

     * 'Interactive' mode is similar to 'batch' mode except that we return the
     compiled byte-code together with the ModIface and ModDetails.

    Trying to compile a hs-boot file to byte-code will result in a run-time error.
    This is the only thing that isn't caught by the type-system.
    -}

    -- | Do the recompilation avoidance checks for both one-shot and --make modes
    -- This function is the *only* place in the compiler where we decide whether to
    -- recompile a module or not!
    hscRecompStatus :: Maybe Messager
                    -> HscEnv
                    -> ModSummary
                    -> Maybe ModIface
                    -> HomeModLinkable
                    -> (Int,Int)
                    -> IO HscRecompStatus
    hscRecompStatus :: Maybe Messager
    -> HscEnv
    -> ModSummary
    -> Maybe ModIface
    -> HomeModLinkable
    -> (TypeIndex, TypeIndex)
    -> IO HscRecompStatus
    hscRecompStatus
        Maybe Messager
    mHscMessage HscEnv
    hsc_env ModSummary
    mod_summary Maybe ModIface
    mb_old_iface HomeModLinkable
    old_linkable (TypeIndex, TypeIndex)
    mod_index
      = do
        let
            msg :: RecompileRequired -> IO ()
    msg RecompileRequired
    what = case Maybe Messager
    mHscMessage of
              Just Messager
    hscMessage -> Messager
    hscMessage HscEnv
    hsc_env (TypeIndex, TypeIndex)
    mod_index RecompileRequired
    what ([ModuleNodeEdge] -> ModuleNodeInfo -> ModuleGraphNode
    ModuleNode [] (ModSummary -> ModuleNodeInfo
    ModuleNodeCompile ModSummary
    mod_summary))
              Maybe Messager
    Nothing -> () -> IO ()
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()

        -- First check to see if the interface file agrees with the
        -- source file.
        --
        -- Save the interface that comes back from checkOldIface.
        -- In one-shot mode we don't have the old iface until this
        -- point, when checkOldIface reads it from the disk.
        recomp_if_result
              <- {-# SCC "checkOldIface" #-}
                 IO (MaybeValidated ModIface) -> IO (MaybeValidated ModIface)
    forall a. IO a -> IO a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO (MaybeValidated ModIface) -> IO (MaybeValidated ModIface))
    -> IO (MaybeValidated ModIface) -> IO (MaybeValidated ModIface)
    forall a b. (a -> b) -> a -> b
    $ HscEnv
    -> ModSummary -> Maybe ModIface -> IO (MaybeValidated ModIface)
    checkOldIface HscEnv
    hsc_env ModSummary
    mod_summary Maybe ModIface
    mb_old_iface
        case recomp_if_result of
          OutOfDateItem CompileReason
    reason Maybe ModIface
    mb_checked_iface -> do
            RecompileRequired -> IO ()
    msg (RecompileRequired -> IO ()) -> RecompileRequired -> IO ()
    forall a b. (a -> b) -> a -> b
    $ CompileReason -> RecompileRequired
    NeedsRecompile CompileReason
    reason
            HscRecompStatus -> IO HscRecompStatus
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HscRecompStatus -> IO HscRecompStatus)
    -> HscRecompStatus -> IO HscRecompStatus
    forall a b. (a -> b) -> a -> b
    $ Maybe Fingerprint -> HscRecompStatus
    HscRecompNeeded (Maybe Fingerprint -> HscRecompStatus)
    -> Maybe Fingerprint -> HscRecompStatus
    forall a b. (a -> b) -> a -> b
    $ (ModIface -> Fingerprint) -> Maybe ModIface -> Maybe Fingerprint
    forall a b. (a -> b) -> Maybe a -> Maybe b
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    fmap ModIface -> Fingerprint
    forall (phase :: ModIfacePhase). ModIface_ phase -> Fingerprint
    mi_iface_hash Maybe ModIface
    mb_checked_iface
          UpToDateItem ModIface
    checked_iface -> do
            let lcl_dflags :: DynFlags
    lcl_dflags = ModSummary -> DynFlags
    ms_hspp_opts ModSummary
    mod_summary
            if | Bool -> Bool
    not (Backend -> Bool
    backendGeneratesCode (DynFlags -> Backend
    backend DynFlags
    lcl_dflags)) -> do
                   -- No need for a linkable, we're good to go
                   RecompileRequired -> IO ()
    msg RecompileRequired
    UpToDate
                   HscRecompStatus -> IO HscRecompStatus
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HscRecompStatus -> IO HscRecompStatus)
    -> HscRecompStatus -> IO HscRecompStatus
    forall a b. (a -> b) -> a -> b
    $ ModIface -> HomeModLinkable -> HscRecompStatus
    HscUpToDate ModIface
    checked_iface HomeModLinkable
    emptyHomeModInfoLinkable
               | Bool -> Bool
    not (Backend -> Bool
    backendGeneratesCodeForHsBoot (DynFlags -> Backend
    backend DynFlags
    lcl_dflags))
               , IsBootInterface
    IsBoot <- ModSummary -> IsBootInterface
    isBootSummary ModSummary
    mod_summary -> do
                   RecompileRequired -> IO ()
    msg RecompileRequired
    UpToDate
                   HscRecompStatus -> IO HscRecompStatus
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HscRecompStatus -> IO HscRecompStatus)
    -> HscRecompStatus -> IO HscRecompStatus
    forall a b. (a -> b) -> a -> b
    $ ModIface -> HomeModLinkable -> HscRecompStatus
    HscUpToDate ModIface
    checked_iface HomeModLinkable
    emptyHomeModInfoLinkable

               -- Always recompile with the JS backend when TH is enabled until
               -- #23013 is fixed.
               | Arch
    ArchJavaScript <- Platform -> Arch
    platformArch (DynFlags -> Platform
    targetPlatform DynFlags
    lcl_dflags)
               , Extension -> DynFlags -> Bool
    xopt Extension
    LangExt.TemplateHaskell DynFlags
    lcl_dflags
               -> do
                  RecompileRequired -> IO ()
    msg (RecompileRequired -> IO ()) -> RecompileRequired -> IO ()
    forall a b. (a -> b) -> a -> b
    $ RecompReason -> RecompileRequired
    needsRecompileBecause RecompReason
    THWithJS
                  HscRecompStatus -> IO HscRecompStatus
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HscRecompStatus -> IO HscRecompStatus)
    -> HscRecompStatus -> IO HscRecompStatus
    forall a b. (a -> b) -> a -> b
    $ Maybe Fingerprint -> HscRecompStatus
    HscRecompNeeded (Maybe Fingerprint -> HscRecompStatus)
    -> Maybe Fingerprint -> HscRecompStatus
    forall a b. (a -> b) -> a -> b
    $ Fingerprint -> Maybe Fingerprint
    forall a. a -> Maybe a
    Just (Fingerprint -> Maybe Fingerprint)
    -> Fingerprint -> Maybe Fingerprint
    forall a b. (a -> b) -> a -> b
    $ ModIface -> Fingerprint
    forall (phase :: ModIfacePhase). ModIface_ phase -> Fingerprint
    mi_iface_hash (ModIface -> Fingerprint) -> ModIface -> Fingerprint
    forall a b. (a -> b) -> a -> b
    $ ModIface
    checked_iface

               | Bool
    otherwise -> do
                   -- Do need linkable
                   -- 1. Just check whether we have bytecode/object linkables and then
                   -- we will decide if we need them or not.
                   bc_linkable <- ModIface
    -> ModSummary -> Maybe Linkable -> IO (MaybeValidated Linkable)
    checkByteCode ModIface
    checked_iface ModSummary
    mod_summary (HomeModLinkable -> Maybe Linkable
    homeMod_bytecode HomeModLinkable
    old_linkable)
                   obj_linkable <- liftIO $ checkObjects lcl_dflags (homeMod_object old_linkable) mod_summary
                   trace_if (hsc_logger hsc_env) (vcat [text "BCO linkable", nest 2 (ppr bc_linkable), text "Object Linkable", ppr obj_linkable])

                   let just_bc = Linkable -> HomeModLinkable
    justBytecode (Linkable -> HomeModLinkable)
    -> MaybeValidated Linkable -> MaybeValidated HomeModLinkable
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> MaybeValidated Linkable
    bc_linkable
                       just_o  = Linkable -> HomeModLinkable
    justObjects  (Linkable -> HomeModLinkable)
    -> MaybeValidated Linkable -> MaybeValidated HomeModLinkable
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> MaybeValidated Linkable
    obj_linkable
                       _maybe_both_os = case (MaybeValidated Linkable
    bc_linkable, MaybeValidated Linkable
    obj_linkable) of
                                   (UpToDateItem Linkable
    bc, UpToDateItem Linkable
    o) -> HomeModLinkable -> MaybeValidated HomeModLinkable
    forall a. a -> MaybeValidated a
    UpToDateItem (Linkable -> Linkable -> HomeModLinkable
    bytecodeAndObjects Linkable
    bc Linkable
    o)
                                   -- If missing object code, just say we need to recompile because of object code.
                                   (MaybeValidated Linkable
    _, OutOfDateItem CompileReason
    reason Maybe Linkable
    _) -> CompileReason
    -> Maybe HomeModLinkable -> MaybeValidated HomeModLinkable
    forall a. CompileReason -> Maybe a -> MaybeValidated a
    OutOfDateItem CompileReason
    reason Maybe HomeModLinkable
    forall a. Maybe a
    Nothing
                                   -- If just missing byte code, just use the object code
                                   -- so you should use -fprefer-byte-code with -fwrite-if-simplified-core or you'll
                                   -- end up using bytecode on recompilation
                                   (MaybeValidated Linkable
    _, UpToDateItem {} ) -> MaybeValidated HomeModLinkable
    just_o

                       definitely_both_os = case (MaybeValidated Linkable
    bc_linkable, MaybeValidated Linkable
    obj_linkable) of
                                   (UpToDateItem Linkable
    bc, UpToDateItem Linkable
    o) -> HomeModLinkable -> MaybeValidated HomeModLinkable
    forall a. a -> MaybeValidated a
    UpToDateItem (Linkable -> Linkable -> HomeModLinkable
    bytecodeAndObjects Linkable
    bc Linkable
    o)
                                   -- If missing object code, just say we need to recompile because of object code.
                                   (MaybeValidated Linkable
    _, OutOfDateItem CompileReason
    reason Maybe Linkable
    _) -> CompileReason
    -> Maybe HomeModLinkable -> MaybeValidated HomeModLinkable
    forall a. CompileReason -> Maybe a -> MaybeValidated a
    OutOfDateItem CompileReason
    reason Maybe HomeModLinkable
    forall a. Maybe a
    Nothing
                                   -- If just missing byte code, just use the object code
                                   -- so you should use -fprefer-byte-code with -fwrite-if-simplified-core or you'll
                                   -- end up using bytecode on recompilation
                                   (OutOfDateItem CompileReason
    reason Maybe Linkable
    _,  MaybeValidated Linkable
    _ ) -> CompileReason
    -> Maybe HomeModLinkable -> MaybeValidated HomeModLinkable
    forall a. CompileReason -> Maybe a -> MaybeValidated a
    OutOfDateItem CompileReason
    reason Maybe HomeModLinkable
    forall a. Maybe a
    Nothing

    --               pprTraceM "recomp" (ppr just_bc <+> ppr just_o)
                   -- 2. Decide which of the products we will need
                   let recomp_linkable_result = case () of
                         ()
    _ | Backend -> Bool
    backendCanReuseLoadedCode (DynFlags -> Backend
    backend DynFlags
    lcl_dflags) ->
                               case MaybeValidated Linkable
    bc_linkable of
                                 -- If bytecode is available for Interactive then don't load object code
                                 UpToDateItem Linkable
    _ -> MaybeValidated HomeModLinkable
    just_bc
                                 MaybeValidated Linkable
    _ -> case MaybeValidated Linkable
    obj_linkable of
                                         -- If o is availabe, then just use that
                                         UpToDateItem Linkable
    _ -> MaybeValidated HomeModLinkable
    just_o
                                         MaybeValidated Linkable
    _ -> RecompReason
    -> Maybe HomeModLinkable -> MaybeValidated HomeModLinkable
    forall a. RecompReason -> Maybe a -> MaybeValidated a
    outOfDateItemBecause RecompReason
    MissingBytecode Maybe HomeModLinkable
    forall a. Maybe a
    Nothing
                            -- Need object files for making object files
                            | Backend -> Bool
    backendWritesFiles (DynFlags -> Backend
    backend DynFlags
    lcl_dflags) ->
                               if GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_ByteCodeAndObjectCode DynFlags
    lcl_dflags
                                 -- We say we are going to write both, so recompile unless we have both
                                 then MaybeValidated HomeModLinkable
    definitely_both_os
                                 -- Only load the object file unless we are saying we need to produce both.
                                 -- Unless we do this then you can end up using byte-code for a module you specify -fobject-code for.
                                 else MaybeValidated HomeModLinkable
    just_o
                            | Bool
    otherwise -> [Char] -> SDoc -> MaybeValidated HomeModLinkable
    forall a. HasCallStack => [Char] -> SDoc -> a
    pprPanic [Char]
    "hscRecompStatus" ([Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text ([Char] -> SDoc) -> [Char] -> SDoc
    forall a b. (a -> b) -> a -> b
    $ Backend -> [Char]
    forall a. Show a => a -> [Char]
    show (Backend -> [Char]) -> Backend -> [Char]
    forall a b. (a -> b) -> a -> b
    $ DynFlags -> Backend
    backend DynFlags
    lcl_dflags)
                   case recomp_linkable_result of
                     UpToDateItem HomeModLinkable
    linkable -> do
                       RecompileRequired -> IO ()
    msg (RecompileRequired -> IO ()) -> RecompileRequired -> IO ()
    forall a b. (a -> b) -> a -> b
    $ RecompileRequired
    UpToDate
                       HscRecompStatus -> IO HscRecompStatus
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HscRecompStatus -> IO HscRecompStatus)
    -> HscRecompStatus -> IO HscRecompStatus
    forall a b. (a -> b) -> a -> b
    $ ModIface -> HomeModLinkable -> HscRecompStatus
    HscUpToDate ModIface
    checked_iface (HomeModLinkable -> HscRecompStatus)
    -> HomeModLinkable -> HscRecompStatus
    forall a b. (a -> b) -> a -> b
    $ HomeModLinkable
    linkable
                     OutOfDateItem CompileReason
    reason Maybe HomeModLinkable
    _ -> do
                       RecompileRequired -> IO ()
    msg (RecompileRequired -> IO ()) -> RecompileRequired -> IO ()
    forall a b. (a -> b) -> a -> b
    $ CompileReason -> RecompileRequired
    NeedsRecompile CompileReason
    reason
                       HscRecompStatus -> IO HscRecompStatus
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HscRecompStatus -> IO HscRecompStatus)
    -> HscRecompStatus -> IO HscRecompStatus
    forall a b. (a -> b) -> a -> b
    $ Maybe Fingerprint -> HscRecompStatus
    HscRecompNeeded (Maybe Fingerprint -> HscRecompStatus)
    -> Maybe Fingerprint -> HscRecompStatus
    forall a b. (a -> b) -> a -> b
    $ Fingerprint -> Maybe Fingerprint
    forall a. a -> Maybe a
    Just (Fingerprint -> Maybe Fingerprint)
    -> Fingerprint -> Maybe Fingerprint
    forall a b. (a -> b) -> a -> b
    $ ModIface -> Fingerprint
    forall (phase :: ModIfacePhase). ModIface_ phase -> Fingerprint
    mi_iface_hash (ModIface -> Fingerprint) -> ModIface -> Fingerprint
    forall a b. (a -> b) -> a -> b
    $ ModIface
    checked_iface

    -- | Check that the .o files produced by compilation are already up-to-date
    -- or not.
    checkObjects :: DynFlags -> Maybe Linkable -> ModSummary -> IO (MaybeValidated Linkable)
    checkObjects :: DynFlags
    -> Maybe Linkable -> ModSummary -> IO (MaybeValidated Linkable)
    checkObjects DynFlags
    dflags Maybe Linkable
    mb_old_linkable ModSummary
    summary = do
      let
        dt_enabled :: Bool
    dt_enabled  = GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_BuildDynamicToo DynFlags
    dflags
        this_mod :: Module
    this_mod    = ModSummary -> Module
    ms_mod ModSummary
    summary
        mb_obj_date :: Maybe UTCTime
    mb_obj_date = ModSummary -> Maybe UTCTime
    ms_obj_date ModSummary
    summary
        mb_dyn_obj_date :: Maybe UTCTime
    mb_dyn_obj_date = ModSummary -> Maybe UTCTime
    ms_dyn_obj_date ModSummary
    summary
        mb_if_date :: Maybe UTCTime
    mb_if_date  = ModSummary -> Maybe UTCTime
    ms_iface_date ModSummary
    summary
        obj_fn :: [Char]
    obj_fn      = ModLocation -> [Char]
    ml_obj_file (ModSummary -> ModLocation
    ms_location ModSummary
    summary)
        -- dynamic-too *also* produces the dyn_o_file, so have to check
        -- that's there, and if it's not, regenerate both .o and
        -- .dyn_o
        checkDynamicObj :: IO (MaybeValidated Linkable) -> IO (MaybeValidated Linkable)
    checkDynamicObj IO (MaybeValidated Linkable)
    k = if Bool
    dt_enabled
          then case UTCTime -> UTCTime -> Bool
    forall a. Ord a => a -> a -> Bool
    (>=) (UTCTime -> UTCTime -> Bool)
    -> Maybe UTCTime -> Maybe (UTCTime -> Bool)
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> Maybe UTCTime
    mb_dyn_obj_date Maybe (UTCTime -> Bool) -> Maybe UTCTime -> Maybe Bool
    forall a b. Maybe (a -> b) -> Maybe a -> Maybe b
    forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
    <*> Maybe UTCTime
    mb_if_date of
            Just Bool
    True -> IO (MaybeValidated Linkable)
    k
            Maybe Bool
    _ -> MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (MaybeValidated Linkable -> IO (MaybeValidated Linkable))
    -> MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a b. (a -> b) -> a -> b
    $ RecompReason -> Maybe Linkable -> MaybeValidated Linkable
    forall a. RecompReason -> Maybe a -> MaybeValidated a
    outOfDateItemBecause RecompReason
    MissingDynObjectFile Maybe Linkable
    forall a. Maybe a
    Nothing
          -- Not in dynamic-too mode
          else IO (MaybeValidated Linkable)
    k

      IO (MaybeValidated Linkable) -> IO (MaybeValidated Linkable)
    checkDynamicObj (IO (MaybeValidated Linkable) -> IO (MaybeValidated Linkable))
    -> IO (MaybeValidated Linkable) -> IO (MaybeValidated Linkable)
    forall a b. (a -> b) -> a -> b
    $
        case (,) (UTCTime -> UTCTime -> (UTCTime, UTCTime))
    -> Maybe UTCTime -> Maybe (UTCTime -> (UTCTime, UTCTime))
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> Maybe UTCTime
    mb_obj_date Maybe (UTCTime -> (UTCTime, UTCTime))
    -> Maybe UTCTime -> Maybe (UTCTime, UTCTime)
    forall a b. Maybe (a -> b) -> Maybe a -> Maybe b
    forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
    <*> Maybe UTCTime
    mb_if_date of
          Just (UTCTime
    obj_date, UTCTime
    if_date)
            | UTCTime
    obj_date UTCTime -> UTCTime -> Bool
    forall a. Ord a => a -> a -> Bool
    >= UTCTime
    if_date ->
                case Maybe Linkable
    mb_old_linkable of
                  Just Linkable
    old_linkable
                    | Linkable -> Bool
    linkableIsNativeCodeOnly Linkable
    old_linkable, Linkable -> UTCTime
    linkableTime Linkable
    old_linkable UTCTime -> UTCTime -> Bool
    forall a. Eq a => a -> a -> Bool
    == UTCTime
    obj_date
                    -> MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (MaybeValidated Linkable -> IO (MaybeValidated Linkable))
    -> MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a b. (a -> b) -> a -> b
    $ Linkable -> MaybeValidated Linkable
    forall a. a -> MaybeValidated a
    UpToDateItem Linkable
    old_linkable
                  Maybe Linkable
    _ -> Linkable -> MaybeValidated Linkable
    forall a. a -> MaybeValidated a
    UpToDateItem (Linkable -> MaybeValidated Linkable)
    -> IO Linkable -> IO (MaybeValidated Linkable)
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> Module -> [Char] -> UTCTime -> IO Linkable
    findObjectLinkable Module
    this_mod [Char]
    obj_fn UTCTime
    obj_date
          Maybe (UTCTime, UTCTime)
    _ -> MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (MaybeValidated Linkable -> IO (MaybeValidated Linkable))
    -> MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a b. (a -> b) -> a -> b
    $ RecompReason -> Maybe Linkable -> MaybeValidated Linkable
    forall a. RecompReason -> Maybe a -> MaybeValidated a
    outOfDateItemBecause RecompReason
    MissingObjectFile Maybe Linkable
    forall a. Maybe a
    Nothing

    -- | Check to see if we can reuse the old linkable, by this point we will
    -- have just checked that the old interface matches up with the source hash, so
    -- no need to check that again here
    checkByteCode :: ModIface -> ModSummary -> Maybe Linkable -> IO (MaybeValidated Linkable)
    checkByteCode :: ModIface
    -> ModSummary -> Maybe Linkable -> IO (MaybeValidated Linkable)
    checkByteCode ModIface
    iface ModSummary
    mod_sum Maybe Linkable
    mb_old_linkable =
      case Maybe Linkable
    mb_old_linkable of
        Just Linkable
    old_linkable
          | Bool -> Bool
    not (Linkable -> Bool
    linkableIsNativeCodeOnly Linkable
    old_linkable)
          -> MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (MaybeValidated Linkable -> IO (MaybeValidated Linkable))
    -> MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a b. (a -> b) -> a -> b
    $ (Linkable -> MaybeValidated Linkable
    forall a. a -> MaybeValidated a
    UpToDateItem Linkable
    old_linkable)
        Maybe Linkable
    _ -> ModIface -> ModSummary -> IO (MaybeValidated Linkable)
    loadByteCode ModIface
    iface ModSummary
    mod_sum

    loadByteCode :: ModIface -> ModSummary -> IO (MaybeValidated Linkable)
    loadByteCode :: ModIface -> ModSummary -> IO (MaybeValidated Linkable)
    loadByteCode ModIface
    iface ModSummary
    mod_sum = do
        let
          this_mod :: Module
    this_mod   = ModSummary -> Module
    ms_mod ModSummary
    mod_sum
          if_date :: UTCTime
    if_date    = Maybe UTCTime -> UTCTime
    forall a. HasCallStack => Maybe a -> a
    fromJust (Maybe UTCTime -> UTCTime) -> Maybe UTCTime -> UTCTime
    forall a b. (a -> b) -> a -> b
    $ ModSummary -> Maybe UTCTime
    ms_iface_date ModSummary
    mod_sum
        case ModIface -> ModLocation -> Maybe WholeCoreBindings
    iface_core_bindings ModIface
    iface (ModSummary -> ModLocation
    ms_location ModSummary
    mod_sum) of
          Just WholeCoreBindings
    fi -> do
              MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (Linkable -> MaybeValidated Linkable
    forall a. a -> MaybeValidated a
    UpToDateItem (UTCTime -> Module -> NonEmpty LinkablePart -> Linkable
    Linkable UTCTime
    if_date Module
    this_mod (LinkablePart -> NonEmpty LinkablePart
    forall a. a -> NonEmpty a
    NE.singleton (WholeCoreBindings -> LinkablePart
    CoreBindings WholeCoreBindings
    fi))))
          Maybe WholeCoreBindings
    _ -> MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (MaybeValidated Linkable -> IO (MaybeValidated Linkable))
    -> MaybeValidated Linkable -> IO (MaybeValidated Linkable)
    forall a b. (a -> b) -> a -> b
    $ RecompReason -> Maybe Linkable -> MaybeValidated Linkable
    forall a. RecompReason -> Maybe a -> MaybeValidated a
    outOfDateItemBecause RecompReason
    MissingBytecode Maybe Linkable
    forall a. Maybe a
    Nothing

    --------------------------------------------------------------
    -- Compilers
    --------------------------------------------------------------

    add_iface_to_hpt :: ModIface -> ModDetails -> HscEnv -> IO ()
    add_iface_to_hpt :: ModIface -> ModDetails -> HscEnv -> IO ()
    add_iface_to_hpt ModIface
    iface ModDetails
    details =
      HomeModInfo -> HscEnv -> IO ()
    hscInsertHPT (ModIface -> ModDetails -> HomeModLinkable -> HomeModInfo
    HomeModInfo ModIface
    iface ModDetails
    details HomeModLinkable
    emptyHomeModInfoLinkable)

    -- Knot tying!  See Note [Knot-tying typecheckIface]
    -- See Note [ModDetails and --make mode]
    initModDetails :: HscEnv -> ModIface -> IO ModDetails
    initModDetails :: HscEnv -> ModIface -> IO ModDetails
    initModDetails HscEnv
    hsc_env ModIface
    iface =
      (ModDetails -> IO ModDetails) -> IO ModDetails
    forall a. (a -> IO a) -> IO a
    fixIO ((ModDetails -> IO ModDetails) -> IO ModDetails)
    -> (ModDetails -> IO ModDetails) -> IO ModDetails
    forall a b. (a -> b) -> a -> b
    $ \ModDetails
    details' -> do
        ModIface -> ModDetails -> HscEnv -> IO ()
    add_iface_to_hpt ModIface
    iface ModDetails
    details' HscEnv
    hsc_env
        -- NB: This result is actually not that useful
        -- in one-shot mode, since we're not going to do
        -- any further typechecking.  It's much more useful
        -- in make mode, since this HMI will go into the HPT.
        HscEnv -> ModIface -> IO ModDetails
    genModDetails HscEnv
    hsc_env ModIface
    iface

    -- | Modify flags such that objects are compiled for the interpreter's way.
    -- This is necessary when building foreign objects for Template Haskell, since
    -- those are object code built outside of the pipeline, which means they aren't
    -- subject to the mechanism in 'enableCodeGenWhen' that requests dynamic build
    -- outputs for dependencies when the interpreter used for TH is dynamic but the
    -- main outputs aren't.
    -- Furthermore, the HPT only stores one set of objects with different names for
    -- bytecode linking in 'HomeModLinkable', so the usual hack for switching
    -- between ways in 'get_link_deps' doesn't work.
    compile_for_interpreter :: HscEnv -> (HscEnv -> IO a) -> IO a
    compile_for_interpreter :: forall a. HscEnv -> (HscEnv -> IO a) -> IO a
    compile_for_interpreter HscEnv
    hsc_env HscEnv -> IO a
    use =
      HscEnv -> IO a
    use ((DynFlags -> DynFlags) -> HscEnv -> HscEnv
    hscUpdateFlags DynFlags -> DynFlags
    update HscEnv
    hsc_env)
      where
        update :: DynFlags -> DynFlags
    update DynFlags
    dflags = DynFlags
    dflags {
          targetWays_ = adapt_way interpreterDynamic WayDyn $
                        adapt_way interpreterProfiled WayProf $
                        targetWays_ dflags
          }

        adapt_way :: (Interp -> Bool) -> Way -> Ways -> Ways
    adapt_way Interp -> Bool
    want = if Interp -> Bool
    want (HscEnv -> Interp
    hscInterp HscEnv
    hsc_env) then Way -> Ways -> Ways
    addWay else Way -> Ways -> Ways
    removeWay

    -- | Assemble 'WholeCoreBindings' if the interface contains Core bindings.
    iface_core_bindings :: ModIface -> ModLocation -> Maybe WholeCoreBindings
    iface_core_bindings :: ModIface -> ModLocation -> Maybe WholeCoreBindings
    iface_core_bindings ModIface
    iface ModLocation
    wcb_mod_location =
      Maybe IfaceSimplifiedCore
    mi_simplified_core Maybe IfaceSimplifiedCore
    -> (IfaceSimplifiedCore -> WholeCoreBindings)
    -> Maybe WholeCoreBindings
    forall (f :: * -> *) a b. Functor f => f a -> (a -> b) -> f b
    <&> \(IfaceSimplifiedCore [IfaceBindingX IfaceMaybeRhs IfaceTopBndrInfo]
    bindings IfaceForeign
    foreign') ->
        WholeCoreBindings {
          wcb_bindings :: [IfaceBindingX IfaceMaybeRhs IfaceTopBndrInfo]
    wcb_bindings = [IfaceBindingX IfaceMaybeRhs IfaceTopBndrInfo]
    bindings,
          wcb_module :: Module
    wcb_module = Module
    mi_module,
          ModLocation
    wcb_mod_location :: ModLocation
    wcb_mod_location :: ModLocation
    wcb_mod_location,
          wcb_foreign :: IfaceForeign
    wcb_foreign = IfaceForeign
    foreign'
        }
      where
        ModIface {Module
    mi_module :: Module
    mi_module :: forall (phase :: ModIfacePhase). ModIface_ phase -> Module
    mi_module, Maybe IfaceSimplifiedCore
    mi_simplified_core :: Maybe IfaceSimplifiedCore
    mi_simplified_core :: forall (phase :: ModIfacePhase).
    ModIface_ phase -> Maybe IfaceSimplifiedCore
    mi_simplified_core} = ModIface
    iface

    -- | Return an 'IO' that hydrates Core bindings and compiles them to bytecode if
    -- the interface contains any, using the supplied type env for typechecking.
    --
    -- Unlike 'initWholeCoreBindings', this does not use lazy IO.
    -- Instead, the 'IO' is only evaluated (in @get_link_deps@) when it is clear
    -- that it will be used immediately (because we're linking TH with
    -- @-fprefer-byte-code@ in oneshot mode), and the result is cached in
    -- 'LoaderState'.
    --
    -- 'initWholeCoreBindings' needs the laziness because it is used to populate
    -- 'HomeModInfo', which is done preemptively, in anticipation of downstream
    -- modules using the bytecode for TH in make mode, which might never happen.
    loadIfaceByteCode ::
      HscEnv ->
      ModIface ->
      ModLocation ->
      TypeEnv ->
      Maybe (IO Linkable)
    loadIfaceByteCode :: HscEnv -> ModIface -> ModLocation -> TypeEnv -> Maybe (IO Linkable)
    loadIfaceByteCode HscEnv
    hsc_env ModIface
    iface ModLocation
    location TypeEnv
    type_env =
      WholeCoreBindings -> IO Linkable
    compile (WholeCoreBindings -> IO Linkable)
    -> Maybe WholeCoreBindings -> Maybe (IO Linkable)
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> ModIface -> ModLocation -> Maybe WholeCoreBindings
    iface_core_bindings ModIface
    iface ModLocation
    location
      where
        compile :: WholeCoreBindings -> IO Linkable
    compile WholeCoreBindings
    decls = do
          (bcos, fos) <- HscEnv
    -> TypeEnv -> WholeCoreBindings -> IO (CompiledByteCode, [[Char]])
    compileWholeCoreBindings HscEnv
    hsc_env TypeEnv
    type_env WholeCoreBindings
    decls
          linkable $ BCOs bcos :| [DotO fo ForeignObject | fo <- fos]

        linkable :: NonEmpty LinkablePart -> IO Linkable
    linkable NonEmpty LinkablePart
    parts = do
          if_time <- [Char] -> IO (Maybe UTCTime)
    modificationTimeIfExists (ModLocation -> [Char]
    ml_hi_file ModLocation
    location)
          time <- maybe getCurrentTime pure if_time
          return $! Linkable time (mi_module iface) parts

    loadIfaceByteCodeLazy ::
      HscEnv ->
      ModIface ->
      ModLocation ->
      TypeEnv ->
      IO (Maybe Linkable)
    loadIfaceByteCodeLazy :: HscEnv -> ModIface -> ModLocation -> TypeEnv -> IO (Maybe Linkable)
    loadIfaceByteCodeLazy HscEnv
    hsc_env ModIface
    iface ModLocation
    location TypeEnv
    type_env =
      case ModIface -> ModLocation -> Maybe WholeCoreBindings
    iface_core_bindings ModIface
    iface ModLocation
    location of
        Maybe WholeCoreBindings
    Nothing -> Maybe Linkable -> IO (Maybe Linkable)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return Maybe Linkable
    forall a. Maybe a
    Nothing
        Just WholeCoreBindings
    wcb -> do
          Linkable -> Maybe Linkable
    forall a. a -> Maybe a
    Just (Linkable -> Maybe Linkable) -> IO Linkable -> IO (Maybe Linkable)
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> WholeCoreBindings -> IO Linkable
    compile WholeCoreBindings
    wcb
      where
        compile :: WholeCoreBindings -> IO Linkable
    compile WholeCoreBindings
    decls = do
          ~(bcos, fos) <- IO (CompiledByteCode, [[Char]]) -> IO (CompiledByteCode, [[Char]])
    forall a. IO a -> IO a
    unsafeInterleaveIO (IO (CompiledByteCode, [[Char]])
     -> IO (CompiledByteCode, [[Char]]))
    -> IO (CompiledByteCode, [[Char]])
    -> IO (CompiledByteCode, [[Char]])
    forall a b. (a -> b) -> a -> b
    $ HscEnv
    -> TypeEnv -> WholeCoreBindings -> IO (CompiledByteCode, [[Char]])
    compileWholeCoreBindings HscEnv
    hsc_env TypeEnv
    type_env WholeCoreBindings
    decls
          linkable $ NE.singleton (LazyBCOs bcos fos)

        linkable :: NonEmpty LinkablePart -> IO Linkable
    linkable NonEmpty LinkablePart
    parts = do
          if_time <- [Char] -> IO (Maybe UTCTime)
    modificationTimeIfExists (ModLocation -> [Char]
    ml_hi_file ModLocation
    location)
          time <- maybe getCurrentTime pure if_time
          return $!Linkable time (mi_module iface) parts

    -- | If the 'Linkable' contains Core bindings loaded from an interface, replace
    -- them with a lazy IO thunk that compiles them to bytecode and foreign objects,
    -- using the supplied environment for type checking.
    --
    -- The laziness is necessary because this value is stored purely in a
    -- 'HomeModLinkable' in the home package table, rather than some dedicated
    -- mutable state that would generate bytecode on demand, so we have to call this
    -- function even when we don't know that we'll need the bytecode.
    --
    -- In addition, the laziness has to be hidden inside 'LazyBCOs' because
    -- 'Linkable' is used too generally, so that looking at the constructor to
    -- decide whether to discard it when linking native code would force the thunk
    -- otherwise, incurring a significant performance penalty.
    --
    -- This is sound because generateByteCode just depends on things already loaded
    -- in the interface file.

    -- TODO: We should just use loadIfaceByteCodeLazy instead of the two stage process with
    -- loadByteCode and initWholeCoreBindings. The main reason it is like this is because
    -- initWholeCoreBindings requires a ModDetails, which we don't have during recompilation
    -- checking. We should modify recompilation checking to return a HomeModInfo directly.

    initWholeCoreBindings ::
      HscEnv ->
      ModIface ->
      ModDetails ->
      Linkable ->
      IO Linkable
    initWholeCoreBindings :: HscEnv -> ModIface -> ModDetails -> Linkable -> IO Linkable
    initWholeCoreBindings HscEnv
    hsc_env ModIface
    iface ModDetails
    details (Linkable UTCTime
    utc_time Module
    this_mod NonEmpty LinkablePart
    uls) = do
      UTCTime -> Module -> NonEmpty LinkablePart -> Linkable
    Linkable UTCTime
    utc_time Module
    this_mod (NonEmpty LinkablePart -> Linkable)
    -> IO (NonEmpty LinkablePart) -> IO Linkable
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> (LinkablePart -> IO LinkablePart)
    -> NonEmpty LinkablePart -> IO (NonEmpty LinkablePart)
    forall (t :: * -> *) (m :: * -> *) a b.
    (Traversable t, Monad m) =>
    (a -> m b) -> t a -> m (t b)
    forall (m :: * -> *) a b.
    Monad m =>
    (a -> m b) -> NonEmpty a -> m (NonEmpty b)
    mapM (HscEnv -> LinkablePart -> IO LinkablePart
    go HscEnv
    hsc_env) NonEmpty LinkablePart
    uls
      where
        go :: HscEnv -> LinkablePart -> IO LinkablePart
    go HscEnv
    hsc_env' = \case
          CoreBindings WholeCoreBindings
    wcb -> do
            ModIface -> ModDetails -> HscEnv -> IO ()
    add_iface_to_hpt ModIface
    iface ModDetails
    details HscEnv
    hsc_env
            ~(bco, fos) <- IO (CompiledByteCode, [[Char]]) -> IO (CompiledByteCode, [[Char]])
    forall a. IO a -> IO a
    unsafeInterleaveIO (IO (CompiledByteCode, [[Char]])
     -> IO (CompiledByteCode, [[Char]]))
    -> IO (CompiledByteCode, [[Char]])
    -> IO (CompiledByteCode, [[Char]])
    forall a b. (a -> b) -> a -> b
    $
                           HscEnv
    -> TypeEnv -> WholeCoreBindings -> IO (CompiledByteCode, [[Char]])
    compileWholeCoreBindings HscEnv
    hsc_env' TypeEnv
    type_env WholeCoreBindings
    wcb
            pure (LazyBCOs bco fos)
          LinkablePart
    l -> LinkablePart -> IO LinkablePart
    forall a. a -> IO a
    forall (f :: * -> *) a. Applicative f => a -> f a
    pure LinkablePart
    l

        type_env :: TypeEnv
    type_env = ModDetails -> TypeEnv
    md_types ModDetails
    details

    -- | Hydrate interface Core bindings and compile them to bytecode.
    --
    -- This consists of:
    --
    -- 1. Running a typechecking step to insert the global names that were removed
    --    when the interface was written or were unavailable due to boot import
    --    cycles, converting the bindings to 'CoreBind'.
    --
    -- 2. Restoring the foreign build inputs from their serialized format, resulting
    --    in a set of foreign import stubs and source files added via
    --    'qAddForeignFilePath'.
    --
    -- 3. Generating bytecode and foreign objects from the results of the previous
    --    steps using the usual pipeline actions.
    compileWholeCoreBindings ::
      HscEnv ->
      TypeEnv ->
      WholeCoreBindings ->
      IO (CompiledByteCode, [FilePath])
    compileWholeCoreBindings :: HscEnv
    -> TypeEnv -> WholeCoreBindings -> IO (CompiledByteCode, [[Char]])
    compileWholeCoreBindings HscEnv
    hsc_env TypeEnv
    type_env WholeCoreBindings
    wcb = do
      core_binds <- IO CoreProgram
    typecheck
      (stubs, foreign_files) <- decode_foreign
      gen_bytecode core_binds stubs foreign_files
      where
        typecheck :: IO CoreProgram
    typecheck = do
          types_var <- TypeEnv -> IO (IORef TypeEnv)
    forall a. a -> IO (IORef a)
    newIORef TypeEnv
    type_env
          let
            tc_env = HscEnv
    hsc_env {
              hsc_type_env_vars =
                knotVarsFromModuleEnv (mkModuleEnv [(wcb_module, types_var)])
            }
          initIfaceCheck (text "l") tc_env $
            typecheckWholeCoreBindings types_var wcb

        decode_foreign :: IO (ForeignStubs, [(ForeignSrcLang, [Char])])
    decode_foreign =
          Logger
    -> TmpFs
    -> TempDir
    -> IfaceForeign
    -> IO (ForeignStubs, [(ForeignSrcLang, [Char])])
    decodeIfaceForeign Logger
    logger (HscEnv -> TmpFs
    hsc_tmpfs HscEnv
    hsc_env)
          (DynFlags -> TempDir
    tmpDir (HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env)) IfaceForeign
    wcb_foreign

        gen_bytecode :: CoreProgram
    -> ForeignStubs
    -> [(ForeignSrcLang, [Char])]
    -> IO (CompiledByteCode, [[Char]])
    gen_bytecode CoreProgram
    core_binds ForeignStubs
    stubs [(ForeignSrcLang, [Char])]
    foreign_files = do
          let cgi_guts :: CgInteractiveGuts
    cgi_guts = Module
    -> CoreProgram
    -> [TyCon]
    -> ForeignStubs
    -> [(ForeignSrcLang, [Char])]
    -> Maybe ModBreaks
    -> [SptEntry]
    -> CgInteractiveGuts
    CgInteractiveGuts Module
    wcb_module CoreProgram
    core_binds
                          (TypeEnv -> [TyCon]
    typeEnvTyCons TypeEnv
    type_env) ForeignStubs
    stubs [(ForeignSrcLang, [Char])]
    foreign_files
                          Maybe ModBreaks
    forall a. Maybe a
    Nothing []
          Logger -> SDoc -> IO ()
    trace_if Logger
    logger ([Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "Generating ByteCode for" SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <+> Module -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Module
    wcb_module)
          HscEnv
    -> CgInteractiveGuts
    -> ModLocation
    -> IO (CompiledByteCode, [[Char]])
    generateByteCode HscEnv
    hsc_env CgInteractiveGuts
    cgi_guts ModLocation
    wcb_mod_location

        WholeCoreBindings {Module
    wcb_module :: WholeCoreBindings -> Module
    wcb_module :: Module
    wcb_module, ModLocation
    wcb_mod_location :: WholeCoreBindings -> ModLocation
    wcb_mod_location :: ModLocation
    wcb_mod_location, IfaceForeign
    wcb_foreign :: WholeCoreBindings -> IfaceForeign
    wcb_foreign :: IfaceForeign
    wcb_foreign} = WholeCoreBindings
    wcb

        logger :: Logger
    logger = HscEnv -> Logger
    hsc_logger HscEnv
    hsc_env

    {-
    Note [ModDetails and --make mode]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    An interface file consists of two parts

    * The `ModIface` which ends up getting written to disk.
      The `ModIface` is a completely acyclic tree, which can be serialised
      and de-serialised completely straightforwardly.  The `ModIface` is
      also the structure that is finger-printed for recompilation control.

    * The `ModDetails` which provides a more structured view that is suitable
      for usage during compilation.  The `ModDetails` is heavily cyclic:
      An `Id` contains a `Type`, which mentions a `TyCon` that contains kind
      that mentions other `TyCons`; the `Id` also includes an unfolding that
      in turn mentions more `Id`s;  And so on.

    The `ModIface` can be created from the `ModDetails` and the `ModDetails` from
    a `ModIface`.

    During tidying, just before interfaces are written to disk,
    the ModDetails is calculated and then converted into a ModIface (see GHC.Iface.Make.mkIface_).
    Then when GHC needs to restart typechecking from a certain point it can read the
    interface file, and regenerate the ModDetails from the ModIface (see GHC.IfaceToCore.typecheckIface).
    The key part about the loading is that the ModDetails is regenerated lazily
    from the ModIface, so that there's only a detailed in-memory representation
    for declarations which are actually used from the interface. This mode is
    also used when reading interface files from external packages.

    In the old --make mode implementation, the interface was written after compiling a module
    but the in-memory ModDetails which was used to compute the ModIface was retained.
    The result was that --make mode used much more memory than `-c` mode, because a large amount of
    information about a module would be kept in the ModDetails but never used.

    The new idea is that even in `--make` mode, when there is an in-memory `ModDetails`
    at hand, we re-create the `ModDetails` from the `ModIface`. Doing this means that
    we only have to keep the `ModIface` decls in memory and then lazily load
    detailed representations if needed. It turns out this makes a really big difference
    to memory usage, halving maximum memory used in some cases.

    See !5492 and #13586
    -}

    -- Runs the post-typechecking frontend (desugar and simplify). We want to
    -- generate most of the interface as late as possible. This gets us up-to-date
    -- and good unfoldings and other info in the interface file.
    --
    -- We might create a interface right away, in which case we also return the
    -- updated HomeModInfo. But we might also need to run the backend first. In the
    -- later case Status will be HscRecomp and we return a function from ModIface ->
    -- HomeModInfo.
    --
    -- HscRecomp in turn will carry the information required to compute a interface
    -- when passed the result of the code generator. So all this can and is done at
    -- the call site of the backend code gen if it is run.
    hscDesugarAndSimplify :: ModSummary
           -> FrontendResult
           -> Messages GhcMessage
           -> Maybe Fingerprint
           -> Hsc HscBackendAction
    hscDesugarAndSimplify :: ModSummary
    -> FrontendResult
    -> Messages GhcMessage
    -> Maybe Fingerprint
    -> Hsc HscBackendAction
    hscDesugarAndSimplify ModSummary
    summary (FrontendTypecheck TcGblEnv
    tc_result) Messages GhcMessage
    tc_warnings Maybe Fingerprint
    mb_old_hash = do
      hsc_env <- Hsc HscEnv
    getHscEnv
      dflags <- getDynFlags
      logger <- getLogger
      let bcknd  = DynFlags -> Backend
    backend DynFlags
    dflags
          hsc_src = ModSummary -> HscSource
    ms_hsc_src ModSummary
    summary
          diag_opts = DynFlags -> DiagOpts
    initDiagOpts DynFlags
    dflags
          print_config = DynFlags -> DiagnosticOpts GhcMessage
    initPrintConfig DynFlags
    dflags

      -- Desugar, if appropriate
      --
      -- We usually desugar even when we are not generating code, otherwise we
      -- would miss errors thrown by the desugaring (see #10600). The only
      -- exception is when it is not a HsSrcFile module.
      mb_desugar <- if
        | hsc_src /= HsSrcFile       -> pure Nothing
        -- Desugar an empty ghc-prim:GHC.Prim module by filtering out all its
        -- bindings: the reason is that some of them are invalid (such as top-level
        -- unlifted ones like void# or proxy#) and cause HsToCore failures.
        --
        -- We still need to desugar *something* because the driver and the linkers
        -- expect a valid object file (.o) to be generated for this module.
        | ms_mod summary == gHC_PRIM -> Just <$> hscDesugar' (ms_location summary) (tc_result { tcg_binds = [] })
        | otherwise                  -> Just <$> hscDesugar' (ms_location summary) tc_result

      -- Report the warnings from both typechecking and desugar together
      w <- getDiagnostics
      liftIO $ printOrThrowDiagnostics logger print_config diag_opts (unionMessages tc_warnings w)
      clearDiagnostics

      -- Simplify, if appropriate, and (whether we simplified or not) generate an
      -- interface file.
      case mb_desugar of
          -- Just cause we desugared doesn't mean we are generating code, see above.
          Just ModGuts
    desugared_guts | Backend -> Bool
    backendGeneratesCode Backend
    bcknd -> do
              plugins <- IO [[Char]] -> Hsc [[Char]]
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO [[Char]] -> Hsc [[Char]]) -> IO [[Char]] -> Hsc [[Char]]
    forall a b. (a -> b) -> a -> b
    $ IORef [[Char]] -> IO [[Char]]
    forall a. IORef a -> IO a
    readIORef (TcGblEnv -> IORef [[Char]]
    tcg_th_coreplugins TcGblEnv
    tc_result)
              simplified_guts <- hscSimplify' plugins desugared_guts

              (cg_guts, details) <-
                  liftIO $ hscTidy hsc_env simplified_guts

              !partial_iface <- liftIO $
                    {-# SCC "GHC.Driver.Main.mkPartialIface" #-}
                    -- This `force` saves 2M residency in test T10370
                    -- See Note [Avoiding space leaks in toIface*] for details.
                    fmap force (mkPartialIface hsc_env (cg_binds cg_guts) details summary (tcg_import_decls tc_result) simplified_guts)

              return HscRecomp { hscs_guts = cg_guts,
                                 hscs_mod_location = ms_location summary,
                                 hscs_partial_iface = partial_iface,
                                 hscs_old_iface_hash = mb_old_hash
                               }

          Just ModGuts
    desugared_guts | GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_WriteIfSimplifiedCore DynFlags
    dflags -> do
              -- If -fno-code is enabled (hence we fall through to this case)
              -- Running the simplifier once is necessary before doing byte code generation
              -- in order to inline data con wrappers but we honour whatever level of simplificication the
              -- user requested. See #22008 for some discussion.
              plugins <- IO [[Char]] -> Hsc [[Char]]
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO [[Char]] -> Hsc [[Char]]) -> IO [[Char]] -> Hsc [[Char]]
    forall a b. (a -> b) -> a -> b
    $ IORef [[Char]] -> IO [[Char]]
    forall a. IORef a -> IO a
    readIORef (TcGblEnv -> IORef [[Char]]
    tcg_th_coreplugins TcGblEnv
    tc_result)
              simplified_guts <- hscSimplify' plugins desugared_guts
              (cg_guts, _) <-
                  liftIO $ hscTidy hsc_env simplified_guts

              (iface, _details) <- liftIO $
                hscSimpleIface hsc_env (Just $ cg_binds cg_guts) tc_result summary

              liftIO $ hscMaybeWriteIface logger dflags True iface mb_old_hash (ms_location summary)

              -- when compiling gHC_PRIM without generating code (e.g. with
              -- Haddock), we still want the virtual interface in the cache
              if ms_mod summary == gHC_PRIM
                then return $ HscUpdate (getGhcPrimIface (hsc_hooks hsc_env))
                else return $ HscUpdate iface

          -- We are not generating code or writing an interface with simplified core so we can skip simplification
          -- and generate a simple interface.
          Maybe ModGuts
    _ -> do
            (iface, _details) <- IO (ModIface, ModDetails) -> Hsc (ModIface, ModDetails)
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO (ModIface, ModDetails) -> Hsc (ModIface, ModDetails))
    -> IO (ModIface, ModDetails) -> Hsc (ModIface, ModDetails)
    forall a b. (a -> b) -> a -> b
    $
              HscEnv
    -> Maybe CoreProgram
    -> TcGblEnv
    -> ModSummary
    -> IO (ModIface, ModDetails)
    hscSimpleIface HscEnv
    hsc_env Maybe CoreProgram
    forall a. Maybe a
    Nothing TcGblEnv
    tc_result ModSummary
    summary

            liftIO $ hscMaybeWriteIface logger dflags True iface mb_old_hash (ms_location summary)

            -- when compiling gHC_PRIM without generating code (e.g. with
            -- Haddock), we still want the virtual interface in the cache
            if ms_mod summary == gHC_PRIM
              then return $ HscUpdate (getGhcPrimIface (hsc_hooks hsc_env))
              else return $ HscUpdate iface

    {-
    Note [Writing interface files]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    We write one interface file per module and per compilation, except with
    -dynamic-too where we write two interface files (non-dynamic and dynamic).

    We can write two kinds of interfaces (see Note [Interface file stages] in
    "GHC.Driver.Types"):

       * simple interface: interface generated after the core pipeline

       * full interface: simple interface completed with information from the
         backend

    Depending on the situation, we write one or the other (using
    `hscMaybeWriteIface`). We must be careful with `-dynamic-too` because only the
    backend is run twice, so if we write a simple interface we need to write both
    the non-dynamic and the dynamic interfaces at the same time (with the same
    contents).

    Cases for which we generate simple interfaces:

       * GHC.Driver.Main.hscDesugarAndSimplify: when a compilation does NOT require (re)compilation
       of the hard code

       * GHC.Driver.Pipeline.compileOne': when we run in One Shot mode and target
       bytecode (if interface writing is forced).

       * GHC.Driver.Backpack uses simple interfaces for indefinite units
       (units with module holes). It writes them indirectly by forcing the
       -fwrite-interface flag while setting backend to NoBackend.

    Cases for which we generate full interfaces:

       * GHC.Driver.Pipeline.runPhase: when we must be compiling to regular hard
       code and/or require recompilation.

    By default interface file names are derived from module file names by adding
    suffixes. The interface file name can be overloaded with "-ohi", except when
    `-dynamic-too` is used.

    -}

    -- | Write interface files
    hscMaybeWriteIface
      :: Logger
      -> DynFlags
      -> Bool
      -- ^ Is this a simple interface generated after the core pipeline, or one
      -- with information from the backend? See: Note [Writing interface files]
      -> ModIface
      -> Maybe Fingerprint
      -- ^ The old interface hash, used to decide if we need to actually write the
      -- new interface.
      -> ModLocation
      -> IO ()
    hscMaybeWriteIface :: Logger
    -> DynFlags
    -> Bool
    -> ModIface
    -> Maybe Fingerprint
    -> ModLocation
    -> IO ()
    hscMaybeWriteIface Logger
    logger DynFlags
    dflags Bool
    is_simple ModIface
    iface Maybe Fingerprint
    old_iface ModLocation
    mod_location = do
        let force_write_interface :: Bool
    force_write_interface = GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_WriteInterface DynFlags
    dflags
            write_interface :: Bool
    write_interface = Backend -> Bool
    backendWritesFiles (DynFlags -> Backend
    backend DynFlags
    dflags)

            write_iface :: DynFlags -> ModIface -> IO ()
    write_iface DynFlags
    dflags' ModIface
    iface =
              let !iface_name :: [Char]
    iface_name = if DynFlags -> Bool
    dynamicNow DynFlags
    dflags' then ModLocation -> [Char]
    ml_dyn_hi_file ModLocation
    mod_location else ModLocation -> [Char]
    ml_hi_file ModLocation
    mod_location
                  profile :: Profile
    profile     = DynFlags -> Profile
    targetProfile DynFlags
    dflags'
              in
              {-# SCC "writeIface" #-}
              Logger -> SDoc -> (() -> ()) -> IO () -> IO ()
    forall (m :: * -> *) a.
    MonadIO m =>
    Logger -> SDoc -> (a -> ()) -> m a -> m a
    withTiming Logger
    logger
                  ([Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "WriteIface"SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <+>SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc
    brackets ([Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    iface_name))
                  (() -> () -> ()
    forall a b. a -> b -> a
    const ())
                  (Logger
    -> Profile -> CompressionIFace -> [Char] -> ModIface -> IO ()
    writeIface Logger
    logger Profile
    profile (DynFlags -> CompressionIFace
    flagsToIfCompression DynFlags
    dflags) [Char]
    iface_name ModIface
    iface)

        if (Bool
    write_interface Bool -> Bool -> Bool
    || Bool
    force_write_interface) then do

          -- FIXME: with -dynamic-too, "change" is only meaningful for the
          -- non-dynamic interface, not for the dynamic one. We should have another
          -- flag for the dynamic interface. In the meantime:
          --
          --    * when we write a single full interface, we check if we are
          --    currently writing the dynamic interface due to -dynamic-too, in
          --    which case we ignore "change".
          --
          --    * when we write two simple interfaces at once because of
          --    dynamic-too, we use "change" both for the non-dynamic and the
          --    dynamic interfaces. Hopefully both the dynamic and the non-dynamic
          --    interfaces stay in sync...
          --
          let change :: Bool
    change = Maybe Fingerprint
    old_iface Maybe Fingerprint -> Maybe Fingerprint -> Bool
    forall a. Eq a => a -> a -> Bool
    /= Fingerprint -> Maybe Fingerprint
    forall a. a -> Maybe a
    Just (ModIface -> Fingerprint
    forall (phase :: ModIfacePhase). ModIface_ phase -> Fingerprint
    mi_iface_hash ModIface
    iface)

          let dt :: DynamicTooState
    dt = DynFlags -> DynamicTooState
    dynamicTooState DynFlags
    dflags

          Bool -> IO () -> IO ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    when (Logger -> DumpFlag -> Bool
    logHasDumpFlag Logger
    logger DumpFlag
    Opt_D_dump_if_trace) (IO () -> IO ()) -> IO () -> IO ()
    forall a b. (a -> b) -> a -> b
    $ Logger -> SDoc -> IO ()
    putMsg Logger
    logger (SDoc -> IO ()) -> SDoc -> IO ()
    forall a b. (a -> b) -> a -> b
    $
            SDoc -> TypeIndex -> SDoc -> SDoc
    hang ([Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "Writing interface(s):") TypeIndex
    2 (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ [SDoc] -> SDoc
    forall doc. IsDoc doc => [doc] -> doc
    vcat
             [ [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "Kind:" SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <+> if Bool
    is_simple then [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "simple" else [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "full"
             , [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "Hash change:" SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <+> Bool -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Bool
    change
             , [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "DynamicToo state:" SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <+> [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text (DynamicTooState -> [Char]
    forall a. Show a => a -> [Char]
    show DynamicTooState
    dt)
             ]

          if Bool
    is_simple
             then Bool -> IO () -> IO ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    when Bool
    change (IO () -> IO ()) -> IO () -> IO ()
    forall a b. (a -> b) -> a -> b
    $ do -- FIXME: see 'change' comment above
                DynFlags -> ModIface -> IO ()
    write_iface DynFlags
    dflags ModIface
    iface
                case DynamicTooState
    dt of
                   DynamicTooState
    DT_Dont   -> () -> IO ()
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()
                   DynamicTooState
    DT_Dyn    -> [Char] -> IO ()
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "Unexpected DT_Dyn state when writing simple interface"
                   DynamicTooState
    DT_OK     -> DynFlags -> ModIface -> IO ()
    write_iface (DynFlags -> DynFlags
    setDynamicNow DynFlags
    dflags) ModIface
    iface
             else case DynamicTooState
    dt of
                   DynamicTooState
    DT_Dont | Bool
    change                    -> DynFlags -> ModIface -> IO ()
    write_iface DynFlags
    dflags ModIface
    iface
                   DynamicTooState
    DT_OK   | Bool
    change                    -> DynFlags -> ModIface -> IO ()
    write_iface DynFlags
    dflags ModIface
    iface
                   -- FIXME: see change' comment above
                   DynamicTooState
    DT_Dyn                              -> DynFlags -> ModIface -> IO ()
    write_iface DynFlags
    dflags ModIface
    iface
                   DynamicTooState
    _                                   -> () -> IO ()
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()

          Bool -> IO () -> IO ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    when (GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_WriteHie DynFlags
    dflags) (IO () -> IO ()) -> IO () -> IO ()
    forall a b. (a -> b) -> a -> b
    $ do
              -- This is slightly hacky. A hie file is considered to be up to date
              -- if its modification time on disk is greater than or equal to that
              -- of the .hi file (since we should always write a .hi file if we are
              -- writing a .hie file). However, with the way this code is
              -- structured at the moment, the .hie file is often written before
              -- the .hi file; by touching the file here, we ensure that it is
              -- correctly considered up-to-date.
              --
              -- The file should exist by the time we get here, but we check for
              -- existence just in case, so that we don't accidentally create empty
              -- .hie files.
              let hie_file :: [Char]
    hie_file = ModLocation -> [Char]
    ml_hie_file ModLocation
    mod_location
              IO Bool -> IO () -> IO ()
    forall (m :: * -> *). Monad m => m Bool -> m () -> m ()
    whenM ([Char] -> IO Bool
    doesFileExist [Char]
    hie_file) (IO () -> IO ()) -> IO () -> IO ()
    forall a b. (a -> b) -> a -> b
    $
                [Char] -> IO ()
    GHC.Utils.Touch.touch [Char]
    hie_file
        else
            -- See Note [Strictness in ModIface]
            ModIface -> IO ()
    forceModIface ModIface
    iface

    --------------------------------------------------------------
    -- NoRecomp handlers
    --------------------------------------------------------------

    -- | genModDetails is used to initialise 'ModDetails' at the end of compilation.
    -- This has two main effects:
    -- 1. Increases memory usage by unloading a lot of the TypeEnv
    -- 2. Globalising certain parts (DFunIds) in the TypeEnv (which used to be achieved using UpdateIdInfos)
    -- For the second part to work, it's critical that we use 'initIfaceLoadModule' here rather than
    -- 'initIfaceCheck' as 'initIfaceLoadModule' removes the module from the KnotVars, otherwise name lookups
    -- succeed by hitting the old TypeEnv, which missing out the critical globalisation step for DFuns.

    -- After the DFunIds are globalised, it's critical to overwrite the old TypeEnv with the new
    -- more compact and more correct version. This reduces memory usage whilst compiling the rest of
    -- the module loop.
    genModDetails :: HscEnv -> ModIface -> IO ModDetails
    genModDetails :: HscEnv -> ModIface -> IO ModDetails
    genModDetails HscEnv
    hsc_env ModIface
    old_iface
      = do
        -- CRITICAL: To use initIfaceLoadModule as that removes the current module from the KnotVars and
        -- hence properly globalises DFunIds.
        new_details <- {-# SCC "tcRnIface" #-}
                      HscEnv -> Module -> IfG ModDetails -> IO ModDetails
    forall a. HscEnv -> Module -> IfG a -> IO a
    initIfaceLoadModule HscEnv
    hsc_env (ModIface -> Module
    forall (phase :: ModIfacePhase). ModIface_ phase -> Module
    mi_module ModIface
    old_iface) (ModIface -> IfG ModDetails
    typecheckIface ModIface
    old_iface)
        case lookupKnotVars (hsc_type_env_vars hsc_env) (mi_module old_iface) of
          Maybe (IORef TypeEnv)
    Nothing -> () -> IO ()
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()
          Just IORef TypeEnv
    te_var -> IORef TypeEnv -> TypeEnv -> IO ()
    forall a. IORef a -> a -> IO ()
    writeIORef IORef TypeEnv
    te_var (ModDetails -> TypeEnv
    md_types ModDetails
    new_details)
        dumpIfaceStats hsc_env
        return new_details

    --------------------------------------------------------------
    -- Safe Haskell
    --------------------------------------------------------------

    -- Note [Safe Haskell Trust Check]
    -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    -- Safe Haskell checks that an import is trusted according to the following
    -- rules for an import of module M that resides in Package P:
    --
    --   * If M is recorded as Safe and all its trust dependencies are OK
    --     then M is considered safe.
    --   * If M is recorded as Trustworthy and P is considered trusted and
    --     all M's trust dependencies are OK then M is considered safe.
    --
    -- By trust dependencies we mean that the check is transitive. So if
    -- a module M that is Safe relies on a module N that is trustworthy,
    -- importing module M will first check (according to the second case)
    -- that N is trusted before checking M is trusted.
    --
    -- This is a minimal description, so please refer to the user guide
    -- for more details. The user guide is also considered the authoritative
    -- source in this matter, not the comments or code.

    -- Note [Safe Haskell Inference]
    -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    -- Safe Haskell does Safe inference on modules that don't have any specific
    -- safe haskell mode flag. The basic approach to this is:
    --   * When deciding if we need to do a Safe language check, treat
    --     an unmarked module as having -XSafe mode specified.
    --   * For checks, don't throw errors but return them to the caller.
    --   * Caller checks if there are errors:
    --     * For modules explicitly marked -XSafe, we throw the errors.
    --     * For unmarked modules (inference mode), we drop the errors
    --       and mark the module as being Unsafe.
    --
    -- It used to be that we only did safe inference on modules that had no Safe
    -- Haskell flags, but now we perform safe inference on all modules as we want
    -- to allow users to set the `-Wsafe`, `-Wunsafe` and
    -- `-Wtrustworthy-safe` flags on Trustworthy and Unsafe modules so that a
    -- user can ensure their assumptions are correct and see reasons for why a
    -- module is safe or unsafe.
    --
    -- This is tricky as we must be careful when we should throw an error compared
    -- to just warnings. For checking safe imports we manage it as two steps. First
    -- we check any imports that are required to be safe, then we check all other
    -- imports to see if we can infer them to be safe.

    -- | Check that the safe imports of the module being compiled are valid.
    -- If not we either issue a compilation error if the module is explicitly
    -- using Safe Haskell, or mark the module as unsafe if we're in safe
    -- inference mode.
    hscCheckSafeImports :: TcGblEnv -> Hsc TcGblEnv
    hscCheckSafeImports :: TcGblEnv -> Hsc TcGblEnv
    hscCheckSafeImports TcGblEnv
    tcg_env = do
        dflags   <- Hsc DynFlags
    forall (m :: * -> *). HasDynFlags m => m DynFlags
    getDynFlags
        tcg_env' <- checkSafeImports tcg_env
        checkRULES dflags tcg_env'

      where
        checkRULES :: DynFlags -> TcGblEnv -> Hsc TcGblEnv
    checkRULES DynFlags
    dflags TcGblEnv
    tcg_env' =
          let diag_opts :: DiagOpts
    diag_opts = DynFlags -> DiagOpts
    initDiagOpts DynFlags
    dflags
          in case DynFlags -> Bool
    safeLanguageOn DynFlags
    dflags of
              Bool
    True -> do
                  -- XSafe: we nuke user written RULES
                  Messages GhcMessage -> Hsc ()
    logDiagnostics (Messages GhcMessage -> Hsc ()) -> Messages GhcMessage -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ (DriverMessage -> GhcMessage)
    -> Messages DriverMessage -> Messages GhcMessage
    forall a b. (a -> b) -> Messages a -> Messages b
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    fmap DriverMessage -> GhcMessage
    GhcDriverMessage (Messages DriverMessage -> Messages GhcMessage)
    -> Messages DriverMessage -> Messages GhcMessage
    forall a b. (a -> b) -> a -> b
    $ DiagOpts
    -> [GenLocated SrcSpanAnnA (RuleDecl (GhcPass 'Typechecked))]
    -> Messages DriverMessage
    warns DiagOpts
    diag_opts (TcGblEnv -> [LRuleDecl (GhcPass 'Typechecked)]
    tcg_rules TcGblEnv
    tcg_env')
                  TcGblEnv -> Hsc TcGblEnv
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return TcGblEnv
    tcg_env' { tcg_rules = [] }
              Bool
    False
                    -- SafeInferred: user defined RULES, so not safe
                  | DynFlags -> Bool
    safeInferOn DynFlags
    dflags Bool -> Bool -> Bool
    && Bool -> Bool
    not ([LRuleDecl (GhcPass 'Typechecked)] -> Bool
    forall a. [a] -> Bool
    forall (t :: * -> *) a. Foldable t => t a -> Bool
    null ([LRuleDecl (GhcPass 'Typechecked)] -> Bool)
    -> [LRuleDecl (GhcPass 'Typechecked)] -> Bool
    forall a b. (a -> b) -> a -> b
    $ TcGblEnv -> [LRuleDecl (GhcPass 'Typechecked)]
    tcg_rules TcGblEnv
    tcg_env')
                  -> TcGblEnv -> Messages DriverMessage -> Hsc TcGblEnv
    forall e. Diagnostic e => TcGblEnv -> Messages e -> Hsc TcGblEnv
    markUnsafeInfer TcGblEnv
    tcg_env' (Messages DriverMessage -> Hsc TcGblEnv)
    -> Messages DriverMessage -> Hsc TcGblEnv
    forall a b. (a -> b) -> a -> b
    $ DiagOpts
    -> [GenLocated SrcSpanAnnA (RuleDecl (GhcPass 'Typechecked))]
    -> Messages DriverMessage
    warns DiagOpts
    diag_opts (TcGblEnv -> [LRuleDecl (GhcPass 'Typechecked)]
    tcg_rules TcGblEnv
    tcg_env')

                    -- Trustworthy OR SafeInferred: with no RULES
                  | Bool
    otherwise
                  -> TcGblEnv -> Hsc TcGblEnv
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return TcGblEnv
    tcg_env'

        warns :: DiagOpts
    -> [GenLocated SrcSpanAnnA (RuleDecl (GhcPass 'Typechecked))]
    -> Messages DriverMessage
    warns DiagOpts
    diag_opts [GenLocated SrcSpanAnnA (RuleDecl (GhcPass 'Typechecked))]
    rules = Bag (MsgEnvelope DriverMessage) -> Messages DriverMessage
    forall e. Bag (MsgEnvelope e) -> Messages e
    mkMessages (Bag (MsgEnvelope DriverMessage) -> Messages DriverMessage)
    -> Bag (MsgEnvelope DriverMessage) -> Messages DriverMessage
    forall a b. (a -> b) -> a -> b
    $ [MsgEnvelope DriverMessage] -> Bag (MsgEnvelope DriverMessage)
    forall a. [a] -> Bag a
    listToBag ([MsgEnvelope DriverMessage] -> Bag (MsgEnvelope DriverMessage))
    -> [MsgEnvelope DriverMessage] -> Bag (MsgEnvelope DriverMessage)
    forall a b. (a -> b) -> a -> b
    $ (GenLocated SrcSpanAnnA (RuleDecl (GhcPass 'Typechecked))
     -> MsgEnvelope DriverMessage)
    -> [GenLocated SrcSpanAnnA (RuleDecl (GhcPass 'Typechecked))]
    -> [MsgEnvelope DriverMessage]
    forall a b. (a -> b) -> [a] -> [b]
    map (DiagOpts
    -> LRuleDecl (GhcPass 'Typechecked) -> MsgEnvelope DriverMessage
    warnRules DiagOpts
    diag_opts) [GenLocated SrcSpanAnnA (RuleDecl (GhcPass 'Typechecked))]
    rules

        warnRules :: DiagOpts -> LRuleDecl GhcTc -> MsgEnvelope DriverMessage
        warnRules :: DiagOpts
    -> LRuleDecl (GhcPass 'Typechecked) -> MsgEnvelope DriverMessage
    warnRules DiagOpts
    diag_opts (L SrcSpanAnnA
    loc RuleDecl (GhcPass 'Typechecked)
    rule) =
            DiagOpts -> SrcSpan -> DriverMessage -> MsgEnvelope DriverMessage
    forall e. Diagnostic e => DiagOpts -> SrcSpan -> e -> MsgEnvelope e
    mkPlainMsgEnvelope DiagOpts
    diag_opts (SrcSpanAnnA -> SrcSpan
    forall a. HasLoc a => a -> SrcSpan
    locA SrcSpanAnnA
    loc) (DriverMessage -> MsgEnvelope DriverMessage)
    -> DriverMessage -> MsgEnvelope DriverMessage
    forall a b. (a -> b) -> a -> b
    $ RuleDecl (GhcPass 'Typechecked) -> DriverMessage
    DriverUserDefinedRuleIgnored RuleDecl (GhcPass 'Typechecked)
    rule

    -- | Validate that safe imported modules are actually safe.  For modules in the
    -- HomePackage (the package the module we are compiling in resides) this just
    -- involves checking its trust type is 'Safe' or 'Trustworthy'. For modules
    -- that reside in another package we also must check that the external package
    -- is trusted. See the Note [Safe Haskell Trust Check] above for more
    -- information.
    --
    -- The code for this is quite tricky as the whole algorithm is done in a few
    -- distinct phases in different parts of the code base. See
    -- 'GHC.Rename.Names.rnImportDecl' for where package trust dependencies for a
    -- module are collected and unioned.  Specifically see the Note [Tracking Trust
    -- Transitively] in "GHC.Rename.Names" and the Note [Trust Own Package] in
    -- "GHC.Rename.Names".
    checkSafeImports :: TcGblEnv -> Hsc TcGblEnv
    checkSafeImports :: TcGblEnv -> Hsc TcGblEnv
    checkSafeImports TcGblEnv
    tcg_env
        = do
            dflags <- Hsc DynFlags
    forall (m :: * -> *). HasDynFlags m => m DynFlags
    getDynFlags
            imps <- mapM condense imports'
            let (safeImps, regImps) = partition (\(Module
    _,SrcSpan
    _,Bool
    s) -> Bool
    s) imps

            -- We want to use the warning state specifically for detecting if safe
            -- inference has failed, so store and clear any existing warnings.
            oldErrs <- getDiagnostics
            clearDiagnostics

            -- Check safe imports are correct
            safePkgs <- S.fromList <$> mapMaybeM checkSafe safeImps
            safeErrs <- getDiagnostics
            clearDiagnostics

            -- Check non-safe imports are correct if inferring safety
            -- See the Note [Safe Haskell Inference]
            (infErrs, infPkgs) <- case (safeInferOn dflags) of
              Bool
    False -> (Messages GhcMessage, Set UnitId)
    -> Hsc (Messages GhcMessage, Set UnitId)
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (Messages GhcMessage
    forall e. Messages e
    emptyMessages, Set UnitId
    forall a. Set a
    S.empty)
              Bool
    True -> do infPkgs <- [UnitId] -> Set UnitId
    forall a. Ord a => [a] -> Set a
    S.fromList ([UnitId] -> Set UnitId) -> Hsc [UnitId] -> Hsc (Set UnitId)
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> ((Module, SrcSpan, Bool) -> Hsc (Maybe UnitId))
    -> [(Module, SrcSpan, Bool)] -> Hsc [UnitId]
    forall (m :: * -> *) a b.
    Applicative m =>
    (a -> m (Maybe b)) -> [a] -> m [b]
    mapMaybeM (Module, SrcSpan, Bool) -> Hsc (Maybe UnitId)
    forall a. (Module, SrcSpan, a) -> Hsc (Maybe UnitId)
    checkSafe [(Module, SrcSpan, Bool)]
    regImps
                         infErrs <- getDiagnostics
                         clearDiagnostics
                         return (infErrs, infPkgs)

            -- restore old errors
            logDiagnostics oldErrs

            diag_opts <- initDiagOpts <$> getDynFlags
            print_config <- initPrintConfig <$> getDynFlags
            logger <- getLogger

            -- Will throw if failed safe check
            liftIO $ printOrThrowDiagnostics logger print_config diag_opts safeErrs

            -- No fatal warnings or errors: passed safe check
            let infPassed = Messages GhcMessage -> Bool
    forall e. Messages e -> Bool
    isEmptyMessages Messages GhcMessage
    infErrs
            tcg_env' <- case (not infPassed) of
              Bool
    True  -> TcGblEnv -> Messages GhcMessage -> Hsc TcGblEnv
    forall e. Diagnostic e => TcGblEnv -> Messages e -> Hsc TcGblEnv
    markUnsafeInfer TcGblEnv
    tcg_env Messages GhcMessage
    infErrs
              Bool
    False -> TcGblEnv -> Hsc TcGblEnv
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return TcGblEnv
    tcg_env
            when (packageTrustOn dflags) $ checkPkgTrust pkgReqs
            let newTrust = DynFlags -> Set UnitId -> Set UnitId -> Bool -> ImportAvails
    pkgTrustReqs DynFlags
    dflags Set UnitId
    safePkgs Set UnitId
    infPkgs Bool
    infPassed
            return tcg_env' { tcg_imports = impInfo `plusImportAvails` newTrust }

      where
        impInfo :: ImportAvails
    impInfo  = TcGblEnv -> ImportAvails
    tcg_imports TcGblEnv
    tcg_env     -- ImportAvails
        imports :: ImportedMods
    imports  = ImportAvails -> ImportedMods
    imp_mods ImportAvails
    impInfo        -- ImportedMods
        imports1 :: [(Module, [ImportedBy])]
    imports1 = ImportedMods -> [(Module, [ImportedBy])]
    forall k a. Map k a -> [(k, a)]
    M.toList ImportedMods
    imports -- (Module, [ImportedBy])
        imports' :: [(Module, [ImportedModsVal])]
    imports' = ((Module, [ImportedBy]) -> (Module, [ImportedModsVal]))
    -> [(Module, [ImportedBy])] -> [(Module, [ImportedModsVal])]
    forall a b. (a -> b) -> [a] -> [b]
    map (([ImportedBy] -> [ImportedModsVal])
    -> (Module, [ImportedBy]) -> (Module, [ImportedModsVal])
    forall a b. (a -> b) -> (Module, a) -> (Module, b)
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    fmap [ImportedBy] -> [ImportedModsVal]
    importedByUser) [(Module, [ImportedBy])]
    imports1 -- (Module, [ImportedModsVal])
        pkgReqs :: Set UnitId
    pkgReqs  = ImportAvails -> Set UnitId
    imp_trust_pkgs ImportAvails
    impInfo  -- [Unit]

        condense :: (Module, [ImportedModsVal]) -> Hsc (Module, SrcSpan, IsSafeImport)
        condense :: (Module, [ImportedModsVal]) -> Hsc (Module, SrcSpan, Bool)
    condense (Module
    _, [])   = [Char] -> Hsc (Module, SrcSpan, Bool)
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "GHC.Driver.Main.condense: Pattern match failure!"
        condense (Module
    m, ImportedModsVal
    x:[ImportedModsVal]
    xs) = do imv <- (ImportedModsVal -> ImportedModsVal -> Hsc ImportedModsVal)
    -> ImportedModsVal -> [ImportedModsVal] -> Hsc ImportedModsVal
    forall (t :: * -> *) (m :: * -> *) b a.
    (Foldable t, Monad m) =>
    (b -> a -> m b) -> b -> t a -> m b
    foldlM ImportedModsVal -> ImportedModsVal -> Hsc ImportedModsVal
    cond' ImportedModsVal
    x [ImportedModsVal]
    xs
                                return (m, imv_span imv, imv_is_safe imv)

        -- ImportedModsVal = (ModuleName, Bool, SrcSpan, IsSafeImport)
        cond' :: ImportedModsVal -> ImportedModsVal -> Hsc ImportedModsVal
        cond' :: ImportedModsVal -> ImportedModsVal -> Hsc ImportedModsVal
    cond' ImportedModsVal
    v1 ImportedModsVal
    v2
            | ImportedModsVal -> Bool
    imv_is_safe ImportedModsVal
    v1 Bool -> Bool -> Bool
    forall a. Eq a => a -> a -> Bool
    /= ImportedModsVal -> Bool
    imv_is_safe ImportedModsVal
    v2
            = MsgEnvelope GhcMessage -> Hsc ImportedModsVal
    forall (io :: * -> *) a.
    MonadIO io =>
    MsgEnvelope GhcMessage -> io a
    throwOneError (MsgEnvelope GhcMessage -> Hsc ImportedModsVal)
    -> MsgEnvelope GhcMessage -> Hsc ImportedModsVal
    forall a b. (a -> b) -> a -> b
    $
                SrcSpan -> GhcMessage -> MsgEnvelope GhcMessage
    forall e. Diagnostic e => SrcSpan -> e -> MsgEnvelope e
    mkPlainErrorMsgEnvelope (ImportedModsVal -> SrcSpan
    imv_span ImportedModsVal
    v1) (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $
                DriverMessage -> GhcMessage
    GhcDriverMessage (DriverMessage -> GhcMessage) -> DriverMessage -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ ModuleName -> DriverMessage
    DriverMixedSafetyImport (ImportedModsVal -> ModuleName
    imv_name ImportedModsVal
    v1)
            | Bool
    otherwise
            = ImportedModsVal -> Hsc ImportedModsVal
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ImportedModsVal
    v1

        -- easier interface to work with
        checkSafe :: (Module, SrcSpan, a) -> Hsc (Maybe UnitId)
        checkSafe :: forall a. (Module, SrcSpan, a) -> Hsc (Maybe UnitId)
    checkSafe (Module
    m, SrcSpan
    l, a
    _) = (Maybe UnitId, Set UnitId) -> Maybe UnitId
    forall a b. (a, b) -> a
    fst ((Maybe UnitId, Set UnitId) -> Maybe UnitId)
    -> Hsc (Maybe UnitId, Set UnitId) -> Hsc (Maybe UnitId)
    forall a b. (a -> b) -> Hsc a -> Hsc b
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    `fmap` Module -> SrcSpan -> Hsc (Maybe UnitId, Set UnitId)
    hscCheckSafe' Module
    m SrcSpan
    l

        -- what pkg's to add to our trust requirements
        pkgTrustReqs :: DynFlags -> Set UnitId -> Set UnitId ->
              Bool -> ImportAvails
        pkgTrustReqs :: DynFlags -> Set UnitId -> Set UnitId -> Bool -> ImportAvails
    pkgTrustReqs DynFlags
    dflags Set UnitId
    req Set UnitId
    inf Bool
    infPassed | DynFlags -> Bool
    safeInferOn DynFlags
    dflags
                                      Bool -> Bool -> Bool
    && Bool -> Bool
    not (DynFlags -> Bool
    safeHaskellModeEnabled DynFlags
    dflags) Bool -> Bool -> Bool
    && Bool
    infPassed
                                       = ImportAvails
    emptyImportAvails {
                                           imp_trust_pkgs = req `S.union` inf
                                       }
        pkgTrustReqs DynFlags
    dflags Set UnitId
    _   Set UnitId
    _ Bool
    _ | DynFlags -> SafeHaskellMode
    safeHaskell DynFlags
    dflags SafeHaskellMode -> SafeHaskellMode -> Bool
    forall a. Eq a => a -> a -> Bool
    == SafeHaskellMode
    Sf_Unsafe
                             = ImportAvails
    emptyImportAvails
        pkgTrustReqs DynFlags
    _ Set UnitId
    req Set UnitId
    _ Bool
    _ = ImportAvails
    emptyImportAvails { imp_trust_pkgs = req }

    -- | Check that a module is safe to import.
    --
    -- We return True to indicate the import is safe and False otherwise
    -- although in the False case an exception may be thrown first.
    hscCheckSafe :: HscEnv -> Module -> SrcSpan -> IO Bool
    hscCheckSafe :: HscEnv -> Module -> SrcSpan -> IO Bool
    hscCheckSafe HscEnv
    hsc_env Module
    m SrcSpan
    l = HscEnv -> Hsc Bool -> IO Bool
    forall a. HscEnv -> Hsc a -> IO a
    runHsc HscEnv
    hsc_env (Hsc Bool -> IO Bool) -> Hsc Bool -> IO Bool
    forall a b. (a -> b) -> a -> b
    $ do
        dflags <- Hsc DynFlags
    forall (m :: * -> *). HasDynFlags m => m DynFlags
    getDynFlags
        pkgs <- snd `fmap` hscCheckSafe' m l
        when (packageTrustOn dflags) $ checkPkgTrust pkgs
        errs <- getDiagnostics
        return $ isEmptyMessages errs

    -- | Return if a module is trusted and the pkgs it depends on to be trusted.
    hscGetSafe :: HscEnv -> Module -> SrcSpan -> IO (Bool, Set UnitId)
    hscGetSafe :: HscEnv -> Module -> SrcSpan -> IO (Bool, Set UnitId)
    hscGetSafe HscEnv
    hsc_env Module
    m SrcSpan
    l = HscEnv -> Hsc (Bool, Set UnitId) -> IO (Bool, Set UnitId)
    forall a. HscEnv -> Hsc a -> IO a
    runHsc HscEnv
    hsc_env (Hsc (Bool, Set UnitId) -> IO (Bool, Set UnitId))
    -> Hsc (Bool, Set UnitId) -> IO (Bool, Set UnitId)
    forall a b. (a -> b) -> a -> b
    $ do
        (self, pkgs) <- Module -> SrcSpan -> Hsc (Maybe UnitId, Set UnitId)
    hscCheckSafe' Module
    m SrcSpan
    l
        good         <- isEmptyMessages `fmap` getDiagnostics
        clearDiagnostics -- don't want them printed...
        let pkgs' | Just UnitId
    p <- Maybe UnitId
    self = UnitId -> Set UnitId -> Set UnitId
    forall a. Ord a => a -> Set a -> Set a
    S.insert UnitId
    p Set UnitId
    pkgs
                  | Bool
    otherwise      = Set UnitId
    pkgs
        return (good, pkgs')

    -- | Is a module trusted? If not, throw or log errors depending on the type.
    -- Return (regardless of trusted or not) if the trust type requires the modules
    -- own package be trusted and a list of other packages required to be trusted
    -- (these later ones haven't been checked) but the own package trust has been.
    hscCheckSafe' :: Module -> SrcSpan
      -> Hsc (Maybe UnitId, Set UnitId)
    hscCheckSafe' :: Module -> SrcSpan -> Hsc (Maybe UnitId, Set UnitId)
    hscCheckSafe' Module
    m SrcSpan
    l = do
        hsc_env <- Hsc HscEnv
    getHscEnv
        let home_unit = HscEnv -> HomeUnit
    hsc_home_unit HscEnv
    hsc_env
        (tw, pkgs) <- isModSafe home_unit m l
        case tw of
            Bool
    False                           -> (Maybe UnitId, Set UnitId) -> Hsc (Maybe UnitId, Set UnitId)
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (Maybe UnitId
    forall a. Maybe a
    Nothing, Set UnitId
    pkgs)
            Bool
    True | HomeUnit -> Module -> Bool
    isHomeModule HomeUnit
    home_unit Module
    m -> (Maybe UnitId, Set UnitId) -> Hsc (Maybe UnitId, Set UnitId)
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (Maybe UnitId
    forall a. Maybe a
    Nothing, Set UnitId
    pkgs)
                 -- TODO: do we also have to check the trust of the instantiation?
                 -- Not necessary if that is reflected in dependencies
                 | Bool
    otherwise   -> (Maybe UnitId, Set UnitId) -> Hsc (Maybe UnitId, Set UnitId)
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (UnitId -> Maybe UnitId
    forall a. a -> Maybe a
    Just (UnitId -> Maybe UnitId) -> UnitId -> Maybe UnitId
    forall a b. (a -> b) -> a -> b
    $ GenUnit UnitId -> UnitId
    toUnitId (Module -> GenUnit UnitId
    forall unit. GenModule unit -> unit
    moduleUnit Module
    m), Set UnitId
    pkgs)
      where
        isModSafe :: HomeUnit -> Module -> SrcSpan -> Hsc (Bool, Set UnitId)
        isModSafe :: HomeUnit -> Module -> SrcSpan -> Hsc (Bool, Set UnitId)
    isModSafe HomeUnit
    home_unit Module
    m SrcSpan
    l = do
            hsc_env <- Hsc HscEnv
    getHscEnv
            dflags <- getDynFlags
            iface <- lookup' m
            let diag_opts = DynFlags -> DiagOpts
    initDiagOpts DynFlags
    dflags
            case iface of
                -- can't load iface to check trust!
                Maybe ModIface
    Nothing -> MsgEnvelope GhcMessage -> Hsc (Bool, Set UnitId)
    forall (io :: * -> *) a.
    MonadIO io =>
    MsgEnvelope GhcMessage -> io a
    throwOneError (MsgEnvelope GhcMessage -> Hsc (Bool, Set UnitId))
    -> MsgEnvelope GhcMessage -> Hsc (Bool, Set UnitId)
    forall a b. (a -> b) -> a -> b
    $
                             SrcSpan -> GhcMessage -> MsgEnvelope GhcMessage
    forall e. Diagnostic e => SrcSpan -> e -> MsgEnvelope e
    mkPlainErrorMsgEnvelope SrcSpan
    l (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $
                             DriverMessage -> GhcMessage
    GhcDriverMessage (DriverMessage -> GhcMessage) -> DriverMessage -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ Module -> DriverMessage
    DriverCannotLoadInterfaceFile Module
    m

                -- got iface, check trust
                Just ModIface
    iface' ->
                    let trust :: SafeHaskellMode
    trust = IfaceTrustInfo -> SafeHaskellMode
    getSafeMode (IfaceTrustInfo -> SafeHaskellMode)
    -> IfaceTrustInfo -> SafeHaskellMode
    forall a b. (a -> b) -> a -> b
    $ ModIface -> IfaceTrustInfo
    forall (phase :: ModIfacePhase). ModIface_ phase -> IfaceTrustInfo
    mi_trust ModIface
    iface'
                        trust_own_pkg :: Bool
    trust_own_pkg = ModIface -> Bool
    forall (phase :: ModIfacePhase). ModIface_ phase -> Bool
    mi_trust_pkg ModIface
    iface'
                        -- check module is trusted
                        safeM :: Bool
    safeM = SafeHaskellMode
    trust SafeHaskellMode -> [SafeHaskellMode] -> Bool
    forall a. Eq a => a -> [a] -> Bool
    forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
    `elem` [SafeHaskellMode
    Sf_Safe, SafeHaskellMode
    Sf_SafeInferred, SafeHaskellMode
    Sf_Trustworthy]
                        -- check package is trusted
                        safeP :: Bool
    safeP = DynFlags
    -> UnitState
    -> HomeUnit
    -> SafeHaskellMode
    -> Bool
    -> Module
    -> Bool
    packageTrusted DynFlags
    dflags (HasDebugCallStack => HscEnv -> UnitState
    HscEnv -> UnitState
    hsc_units HscEnv
    hsc_env) HomeUnit
    home_unit SafeHaskellMode
    trust Bool
    trust_own_pkg Module
    m
                        -- pkg trust reqs
                        pkgRs :: Set UnitId
    pkgRs = Dependencies -> Set UnitId
    dep_trusted_pkgs (Dependencies -> Set UnitId) -> Dependencies -> Set UnitId
    forall a b. (a -> b) -> a -> b
    $ ModIface -> Dependencies
    forall (phase :: ModIfacePhase). ModIface_ phase -> Dependencies
    mi_deps ModIface
    iface'
                        -- warn if Safe module imports Safe-Inferred module.
                        warns :: Messages GhcMessage
    warns = if WarningFlag -> DynFlags -> Bool
    wopt WarningFlag
    Opt_WarnInferredSafeImports DynFlags
    dflags
                                    Bool -> Bool -> Bool
    && DynFlags -> Bool
    safeLanguageOn DynFlags
    dflags
                                    Bool -> Bool -> Bool
    && SafeHaskellMode
    trust SafeHaskellMode -> SafeHaskellMode -> Bool
    forall a. Eq a => a -> a -> Bool
    == SafeHaskellMode
    Sf_SafeInferred
                                    then DiagOpts -> Messages GhcMessage
    inferredImportWarn DiagOpts
    diag_opts
                                    else Messages GhcMessage
    forall e. Messages e
    emptyMessages
                        -- General errors we throw but Safe errors we log
                        errs :: Messages GhcMessage
    errs = case (Bool
    safeM, Bool
    safeP) of
                            (Bool
    True, Bool
    True ) -> Messages GhcMessage
    forall e. Messages e
    emptyMessages
                            (Bool
    True, Bool
    False) -> Messages GhcMessage
    pkgTrustErr
                            (Bool
    False, Bool
    _   ) -> Messages GhcMessage
    modTrustErr
                    in do
                        Messages GhcMessage -> Hsc ()
    logDiagnostics Messages GhcMessage
    warns
                        Messages GhcMessage -> Hsc ()
    logDiagnostics Messages GhcMessage
    errs
                        (Bool, Set UnitId) -> Hsc (Bool, Set UnitId)
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (SafeHaskellMode
    trust SafeHaskellMode -> SafeHaskellMode -> Bool
    forall a. Eq a => a -> a -> Bool
    == SafeHaskellMode
    Sf_Trustworthy, Set UnitId
    pkgRs)

                    where
                        state :: UnitState
    state = HasDebugCallStack => HscEnv -> UnitState
    HscEnv -> UnitState
    hsc_units HscEnv
    hsc_env
                        inferredImportWarn :: DiagOpts -> Messages GhcMessage
    inferredImportWarn DiagOpts
    diag_opts = MsgEnvelope GhcMessage -> Messages GhcMessage
    forall e. MsgEnvelope e -> Messages e
    singleMessage
                            (MsgEnvelope GhcMessage -> Messages GhcMessage)
    -> MsgEnvelope GhcMessage -> Messages GhcMessage
    forall a b. (a -> b) -> a -> b
    $ DiagOpts
    -> SrcSpan -> NamePprCtx -> GhcMessage -> MsgEnvelope GhcMessage
    forall e.
    Diagnostic e =>
    DiagOpts -> SrcSpan -> NamePprCtx -> e -> MsgEnvelope e
    mkMsgEnvelope DiagOpts
    diag_opts SrcSpan
    l (UnitState -> NamePprCtx
    pkgQual UnitState
    state)
                            (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $ DriverMessage -> GhcMessage
    GhcDriverMessage (DriverMessage -> GhcMessage) -> DriverMessage -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ Module -> DriverMessage
    DriverInferredSafeImport Module
    m
                        pkgTrustErr :: Messages GhcMessage
    pkgTrustErr = MsgEnvelope GhcMessage -> Messages GhcMessage
    forall e. MsgEnvelope e -> Messages e
    singleMessage
                          (MsgEnvelope GhcMessage -> Messages GhcMessage)
    -> MsgEnvelope GhcMessage -> Messages GhcMessage
    forall a b. (a -> b) -> a -> b
    $ SrcSpan -> NamePprCtx -> GhcMessage -> MsgEnvelope GhcMessage
    forall e.
    Diagnostic e =>
    SrcSpan -> NamePprCtx -> e -> MsgEnvelope e
    mkErrorMsgEnvelope SrcSpan
    l (UnitState -> NamePprCtx
    pkgQual UnitState
    state)
                          (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $ DriverMessage -> GhcMessage
    GhcDriverMessage (DriverMessage -> GhcMessage) -> DriverMessage -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ UnitState -> Module -> DriverMessage
    DriverCannotImportFromUntrustedPackage UnitState
    state Module
    m
                        modTrustErr :: Messages GhcMessage
    modTrustErr = MsgEnvelope GhcMessage -> Messages GhcMessage
    forall e. MsgEnvelope e -> Messages e
    singleMessage
                          (MsgEnvelope GhcMessage -> Messages GhcMessage)
    -> MsgEnvelope GhcMessage -> Messages GhcMessage
    forall a b. (a -> b) -> a -> b
    $ SrcSpan -> NamePprCtx -> GhcMessage -> MsgEnvelope GhcMessage
    forall e.
    Diagnostic e =>
    SrcSpan -> NamePprCtx -> e -> MsgEnvelope e
    mkErrorMsgEnvelope SrcSpan
    l (UnitState -> NamePprCtx
    pkgQual UnitState
    state)
                          (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $ DriverMessage -> GhcMessage
    GhcDriverMessage (DriverMessage -> GhcMessage) -> DriverMessage -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ Module -> DriverMessage
    DriverCannotImportUnsafeModule Module
    m

        -- Check the package a module resides in is trusted. Safe compiled
        -- modules are trusted without requiring that their package is trusted. For
        -- trustworthy modules, modules in the home package are trusted but
        -- otherwise we check the package trust flag.
        packageTrusted :: DynFlags -> UnitState -> HomeUnit -> SafeHaskellMode -> Bool -> Module -> Bool
        packageTrusted :: DynFlags
    -> UnitState
    -> HomeUnit
    -> SafeHaskellMode
    -> Bool
    -> Module
    -> Bool
    packageTrusted DynFlags
    dflags UnitState
    unit_state HomeUnit
    home_unit SafeHaskellMode
    safe_mode Bool
    trust_own_pkg Module
    mod =
            case SafeHaskellMode
    safe_mode of
                SafeHaskellMode
    Sf_None      -> Bool
    False -- shouldn't hit these cases
                SafeHaskellMode
    Sf_Ignore    -> Bool
    False -- shouldn't hit these cases
                SafeHaskellMode
    Sf_Unsafe    -> Bool
    False -- prefer for completeness.
                SafeHaskellMode
    _ | Bool -> Bool
    not (DynFlags -> Bool
    packageTrustOn DynFlags
    dflags)     -> Bool
    True
                SafeHaskellMode
    Sf_Safe | Bool -> Bool
    not Bool
    trust_own_pkg         -> Bool
    True
                SafeHaskellMode
    Sf_SafeInferred | Bool -> Bool
    not Bool
    trust_own_pkg -> Bool
    True
                SafeHaskellMode
    _ | HomeUnit -> Module -> Bool
    isHomeModule HomeUnit
    home_unit Module
    mod      -> Bool
    True
                SafeHaskellMode
    _ -> GenericUnitInfo PackageId PackageName UnitId ModuleName Module
    -> Bool
    forall srcpkgid srcpkgname uid modulename mod.
    GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> Bool
    unitIsTrusted (GenericUnitInfo PackageId PackageName UnitId ModuleName Module
     -> Bool)
    -> GenericUnitInfo PackageId PackageName UnitId ModuleName Module
    -> Bool
    forall a b. (a -> b) -> a -> b
    $ HasDebugCallStack =>
    UnitState
    -> GenUnit UnitId
    -> GenericUnitInfo PackageId PackageName UnitId ModuleName Module
    UnitState
    -> GenUnit UnitId
    -> GenericUnitInfo PackageId PackageName UnitId ModuleName Module
    unsafeLookupUnit UnitState
    unit_state (Module -> GenUnit UnitId
    forall unit. GenModule unit -> unit
    moduleUnit Module
    m)

        lookup' :: Module -> Hsc (Maybe ModIface)
        lookup' :: Module -> Hsc (Maybe ModIface)
    lookup' Module
    m = do
            hsc_env <- Hsc HscEnv
    getHscEnv
            iface <- liftIO $ lookupIfaceByModuleHsc hsc_env m
            -- the 'lookupIfaceByModule' method will always fail when calling from GHCi
            -- as the compiler hasn't filled in the various module tables
            -- so we need to call 'getModuleInterface' to load from disk
            case iface of
                Just ModIface
    _  -> Maybe ModIface -> Hsc (Maybe ModIface)
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return Maybe ModIface
    iface
                Maybe ModIface
    Nothing -> (Messages TcRnMessage, Maybe ModIface) -> Maybe ModIface
    forall a b. (a, b) -> b
    snd ((Messages TcRnMessage, Maybe ModIface) -> Maybe ModIface)
    -> Hsc (Messages TcRnMessage, Maybe ModIface)
    -> Hsc (Maybe ModIface)
    forall a b. (a -> b) -> Hsc a -> Hsc b
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    `fmap` (IO (Messages TcRnMessage, Maybe ModIface)
    -> Hsc (Messages TcRnMessage, Maybe ModIface)
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO (Messages TcRnMessage, Maybe ModIface)
     -> Hsc (Messages TcRnMessage, Maybe ModIface))
    -> IO (Messages TcRnMessage, Maybe ModIface)
    -> Hsc (Messages TcRnMessage, Maybe ModIface)
    forall a b. (a -> b) -> a -> b
    $ HscEnv -> Module -> IO (Messages TcRnMessage, Maybe ModIface)
    getModuleInterface HscEnv
    hsc_env Module
    m)

    -- | Check the list of packages are trusted.
    checkPkgTrust :: Set UnitId -> Hsc ()
    checkPkgTrust :: Set UnitId -> Hsc ()
    checkPkgTrust Set UnitId
    pkgs = do
        hsc_env <- Hsc HscEnv
    getHscEnv
        let errors = (UnitId
     -> Bag (MsgEnvelope GhcMessage) -> Bag (MsgEnvelope GhcMessage))
    -> Bag (MsgEnvelope GhcMessage)
    -> Set UnitId
    -> Bag (MsgEnvelope GhcMessage)
    forall a b. (a -> b -> b) -> b -> Set a -> b
    S.foldr UnitId
    -> Bag (MsgEnvelope GhcMessage) -> Bag (MsgEnvelope GhcMessage)
    go Bag (MsgEnvelope GhcMessage)
    forall a. Bag a
    emptyBag Set UnitId
    pkgs
            state  = HasDebugCallStack => HscEnv -> UnitState
    HscEnv -> UnitState
    hsc_units HscEnv
    hsc_env
            go UnitId
    pkg Bag (MsgEnvelope GhcMessage)
    acc
                | GenericUnitInfo PackageId PackageName UnitId ModuleName Module
    -> Bool
    forall srcpkgid srcpkgname uid modulename mod.
    GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> Bool
    unitIsTrusted (GenericUnitInfo PackageId PackageName UnitId ModuleName Module
     -> Bool)
    -> GenericUnitInfo PackageId PackageName UnitId ModuleName Module
    -> Bool
    forall a b. (a -> b) -> a -> b
    $ HasDebugCallStack =>
    UnitState
    -> UnitId
    -> GenericUnitInfo PackageId PackageName UnitId ModuleName Module
    UnitState
    -> UnitId
    -> GenericUnitInfo PackageId PackageName UnitId ModuleName Module
    unsafeLookupUnitId UnitState
    state UnitId
    pkg
                = Bag (MsgEnvelope GhcMessage)
    acc
                | Bool
    otherwise
                = (MsgEnvelope GhcMessage
    -> Bag (MsgEnvelope GhcMessage) -> Bag (MsgEnvelope GhcMessage)
    forall a. a -> Bag a -> Bag a
    `consBag` Bag (MsgEnvelope GhcMessage)
    acc)
                         (MsgEnvelope GhcMessage -> Bag (MsgEnvelope GhcMessage))
    -> MsgEnvelope GhcMessage -> Bag (MsgEnvelope GhcMessage)
    forall a b. (a -> b) -> a -> b
    $ SrcSpan -> NamePprCtx -> GhcMessage -> MsgEnvelope GhcMessage
    forall e.
    Diagnostic e =>
    SrcSpan -> NamePprCtx -> e -> MsgEnvelope e
    mkErrorMsgEnvelope SrcSpan
    noSrcSpan (UnitState -> NamePprCtx
    pkgQual UnitState
    state)
                         (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $ DriverMessage -> GhcMessage
    GhcDriverMessage
                         (DriverMessage -> GhcMessage) -> DriverMessage -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ UnitState -> UnitId -> DriverMessage
    DriverPackageNotTrusted UnitState
    state UnitId
    pkg
        if isEmptyBag errors
          then return ()
          else liftIO $ throwErrors $ mkMessages errors

    -- | Set module to unsafe and (potentially) wipe trust information.
    --
    -- Make sure to call this method to set a module to inferred unsafe, it should
    -- be a central and single failure method. We only wipe the trust information
    -- when we aren't in a specific Safe Haskell mode.
    --
    -- While we only use this for recording that a module was inferred unsafe, we
    -- may call it on modules using Trustworthy or Unsafe flags so as to allow
    -- warning flags for safety to function correctly. See Note [Safe Haskell
    -- Inference].
    markUnsafeInfer :: forall e . Diagnostic e => TcGblEnv -> Messages e -> Hsc TcGblEnv
    markUnsafeInfer :: forall e. Diagnostic e => TcGblEnv -> Messages e -> Hsc TcGblEnv
    markUnsafeInfer TcGblEnv
    tcg_env Messages e
    whyUnsafe = do
        dflags <- Hsc DynFlags
    forall (m :: * -> *). HasDynFlags m => m DynFlags
    getDynFlags

        let reason = WarningFlag -> DiagnosticReason
    WarningWithFlag WarningFlag
    Opt_WarnUnsafe
        let diag_opts = DynFlags -> DiagOpts
    initDiagOpts DynFlags
    dflags
        when (diag_wopt Opt_WarnUnsafe diag_opts)
             (logDiagnostics $ singleMessage $
                 mkPlainMsgEnvelope diag_opts (warnUnsafeOnLoc dflags) $
                 GhcDriverMessage $ DriverUnknownMessage $
                 mkSimpleUnknownDiagnostic $
                 mkPlainDiagnostic reason noHints $
                 whyUnsafe' dflags)

        liftIO $ writeIORef (tcg_safe_infer tcg_env) False
        liftIO $ writeIORef (tcg_safe_infer_reasons tcg_env) emptyMessages
        -- NOTE: Only wipe trust when not in an explicitly safe haskell mode. Other
        -- times inference may be on but we are in Trustworthy mode -- so we want
        -- to record safe-inference failed but not wipe the trust dependencies.
        case not (safeHaskellModeEnabled dflags) of
          Bool
    True  -> TcGblEnv -> Hsc TcGblEnv
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (TcGblEnv -> Hsc TcGblEnv) -> TcGblEnv -> Hsc TcGblEnv
    forall a b. (a -> b) -> a -> b
    $ TcGblEnv
    tcg_env { tcg_imports = wiped_trust }
          Bool
    False -> TcGblEnv -> Hsc TcGblEnv
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return TcGblEnv
    tcg_env

      where
        wiped_trust :: ImportAvails
    wiped_trust   = (TcGblEnv -> ImportAvails
    tcg_imports TcGblEnv
    tcg_env) { imp_trust_pkgs = S.empty }
        pprMod :: SDoc
    pprMod        = ModuleName -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr (ModuleName -> SDoc) -> ModuleName -> SDoc
    forall a b. (a -> b) -> a -> b
    $ Module -> ModuleName
    forall unit. GenModule unit -> ModuleName
    moduleName (Module -> ModuleName) -> Module -> ModuleName
    forall a b. (a -> b) -> a -> b
    $ TcGblEnv -> Module
    tcg_mod TcGblEnv
    tcg_env
        whyUnsafe' :: DynFlags -> SDoc
    whyUnsafe' DynFlags
    df = [SDoc] -> SDoc
    forall doc. IsDoc doc => [doc] -> doc
    vcat [ SDoc -> SDoc
    quotes SDoc
    pprMod SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <+> [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "has been inferred as unsafe!"
                             , [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "Reason:"
                             , TypeIndex -> SDoc -> SDoc
    nest TypeIndex
    4 (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $ ([SDoc] -> SDoc
    forall doc. IsDoc doc => [doc] -> doc
    vcat ([SDoc] -> SDoc) -> [SDoc] -> SDoc
    forall a b. (a -> b) -> a -> b
    $ DynFlags -> [SDoc]
    badFlags DynFlags
    df) SDoc -> SDoc -> SDoc
    $+$
                                        -- MP: Using defaultDiagnosticOpts here is not right but it's also not right to handle these
                                        -- unsafety error messages in an unstructured manner.
                                        ([SDoc] -> SDoc
    forall doc. IsDoc doc => [doc] -> doc
    vcat ([SDoc] -> SDoc) -> [SDoc] -> SDoc
    forall a b. (a -> b) -> a -> b
    $ DiagnosticOpts e -> Bag (MsgEnvelope e) -> [SDoc]
    forall e.
    Diagnostic e =>
    DiagnosticOpts e -> Bag (MsgEnvelope e) -> [SDoc]
    pprMsgEnvelopeBagWithLoc (forall opts.
    HasDefaultDiagnosticOpts (DiagnosticOpts opts) =>
    DiagnosticOpts opts
    defaultDiagnosticOpts @e) (Messages e -> Bag (MsgEnvelope e)
    forall e. Messages e -> Bag (MsgEnvelope e)
    getMessages Messages e
    whyUnsafe)) SDoc -> SDoc -> SDoc
    $+$
                                        ([SDoc] -> SDoc
    forall doc. IsDoc doc => [doc] -> doc
    vcat ([SDoc] -> SDoc) -> [SDoc] -> SDoc
    forall a b. (a -> b) -> a -> b
    $ [ClsInst] -> [SDoc]
    forall {t :: * -> *}. Foldable t => t ClsInst -> [SDoc]
    badInsts ([ClsInst] -> [SDoc]) -> [ClsInst] -> [SDoc]
    forall a b. (a -> b) -> a -> b
    $ TcGblEnv -> [ClsInst]
    tcg_insts TcGblEnv
    tcg_env)
                             ]
        badFlags :: DynFlags -> [SDoc]
    badFlags DynFlags
    df   = ((Extension, DynFlags -> SrcSpan, DynFlags -> Bool,
      DynFlags -> DynFlags)
     -> [SDoc])
    -> [(Extension, DynFlags -> SrcSpan, DynFlags -> Bool,
         DynFlags -> DynFlags)]
    -> [SDoc]
    forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
    concatMap (DynFlags
    -> (Extension, DynFlags -> SrcSpan, DynFlags -> Bool,
        DynFlags -> DynFlags)
    -> [SDoc]
    forall {a} {t} {d}.
    Outputable a =>
    t -> (a, t -> SrcSpan, t -> Bool, d) -> [SDoc]
    badFlag DynFlags
    df) [(Extension, DynFlags -> SrcSpan, DynFlags -> Bool,
      DynFlags -> DynFlags)]
    unsafeFlagsForInfer
        badFlag :: t -> (a, t -> SrcSpan, t -> Bool, d) -> [SDoc]
    badFlag t
    df (a
    ext,t -> SrcSpan
    loc,t -> Bool
    on,d
    _)
            | t -> Bool
    on t
    df     = [MessageClass -> SrcSpan -> SDoc -> SDoc
    mkLocMessage MessageClass
    MCOutput (t -> SrcSpan
    loc t
    df) (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $
                                [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "-X" SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <> a -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr a
    ext SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <+> [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "is not allowed in Safe Haskell"]
            | Bool
    otherwise = []
        badInsts :: t ClsInst -> [SDoc]
    badInsts t ClsInst
    insts = (ClsInst -> [SDoc]) -> t ClsInst -> [SDoc]
    forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
    concatMap ClsInst -> [SDoc]
    badInst t ClsInst
    insts

        checkOverlap :: OverlapMode -> Bool
    checkOverlap (NoOverlap SourceText
    _) = Bool
    False
        checkOverlap OverlapMode
    _             = Bool
    True

        badInst :: ClsInst -> [SDoc]
    badInst ClsInst
    ins | OverlapMode -> Bool
    checkOverlap (OverlapFlag -> OverlapMode
    overlapMode (ClsInst -> OverlapFlag
    is_flag ClsInst
    ins))
                    = [MessageClass -> SrcSpan -> SDoc -> SDoc
    mkLocMessage MessageClass
    MCOutput (Name -> SrcSpan
    nameSrcSpan (Name -> SrcSpan) -> Name -> SrcSpan
    forall a b. (a -> b) -> a -> b
    $ Id -> Name
    forall a. NamedThing a => a -> Name
    getName (Id -> Name) -> Id -> Name
    forall a b. (a -> b) -> a -> b
    $ ClsInst -> Id
    is_dfun ClsInst
    ins) (SDoc -> SDoc) -> SDoc -> SDoc
    forall a b. (a -> b) -> a -> b
    $
                          OverlapMode -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr (OverlapFlag -> OverlapMode
    overlapMode (OverlapFlag -> OverlapMode) -> OverlapFlag -> OverlapMode
    forall a b. (a -> b) -> a -> b
    $ ClsInst -> OverlapFlag
    is_flag ClsInst
    ins) SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <+>
                          [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "overlap mode isn't allowed in Safe Haskell"]
                    | Bool
    otherwise = []

    -- | Figure out the final correct safe haskell mode
    hscGetSafeMode :: TcGblEnv -> Hsc SafeHaskellMode
    hscGetSafeMode :: TcGblEnv -> Hsc SafeHaskellMode
    hscGetSafeMode TcGblEnv
    tcg_env = do
        dflags  <- Hsc DynFlags
    forall (m :: * -> *). HasDynFlags m => m DynFlags
    getDynFlags
        liftIO $ finalSafeMode dflags tcg_env

    --------------------------------------------------------------
    -- Simplifiers
    --------------------------------------------------------------

    -- | Run Core2Core simplifier. The list of String is a list of (Core) plugin
    -- module names added via TH (cf 'addCorePlugin').
    hscSimplify :: HscEnv -> [String] -> ModGuts -> IO ModGuts
    hscSimplify :: HscEnv -> [[Char]] -> ModGuts -> IO ModGuts
    hscSimplify HscEnv
    hsc_env [[Char]]
    plugins ModGuts
    modguts =
        HscEnv -> Hsc ModGuts -> IO ModGuts
    forall a. HscEnv -> Hsc a -> IO a
    runHsc HscEnv
    hsc_env (Hsc ModGuts -> IO ModGuts) -> Hsc ModGuts -> IO ModGuts
    forall a b. (a -> b) -> a -> b
    $ [[Char]] -> ModGuts -> Hsc ModGuts
    hscSimplify' [[Char]]
    plugins ModGuts
    modguts

    -- | Run Core2Core simplifier. The list of String is a list of (Core) plugin
    -- module names added via TH (cf 'addCorePlugin').
    hscSimplify' :: [String] -> ModGuts -> Hsc ModGuts
    hscSimplify' :: [[Char]] -> ModGuts -> Hsc ModGuts
    hscSimplify' [[Char]]
    plugins ModGuts
    ds_result = do
        hsc_env <- Hsc HscEnv
    getHscEnv
        hsc_env_with_plugins <- if null plugins -- fast path
            then return hsc_env
            else liftIO $ initializePlugins
                        $ hscUpdateFlags (\DynFlags
    dflags -> ([Char] -> DynFlags -> DynFlags)
    -> DynFlags -> [[Char]] -> DynFlags
    forall a b. (a -> b -> b) -> b -> [a] -> b
    forall (t :: * -> *) a b.
    Foldable t =>
    (a -> b -> b) -> b -> t a -> b
    foldr [Char] -> DynFlags -> DynFlags
    addPluginModuleName DynFlags
    dflags [[Char]]
    plugins)
                          hsc_env
        {-# SCC "Core2Core" #-}
          liftIO $ core2core hsc_env_with_plugins ds_result

    --------------------------------------------------------------
    -- Interface generators
    --------------------------------------------------------------

    -- | Generate a stripped down interface file, e.g. for boot files or when ghci
    -- generates interface files. See Note [simpleTidyPgm - mkBootModDetailsTc]
    hscSimpleIface :: HscEnv
                   -> Maybe CoreProgram
                   -> TcGblEnv
                   -> ModSummary
                   -> IO (ModIface, ModDetails)
    hscSimpleIface :: HscEnv
    -> Maybe CoreProgram
    -> TcGblEnv
    -> ModSummary
    -> IO (ModIface, ModDetails)
    hscSimpleIface HscEnv
    hsc_env Maybe CoreProgram
    mb_core_program TcGblEnv
    tc_result ModSummary
    summary
        = HscEnv -> Hsc (ModIface, ModDetails) -> IO (ModIface, ModDetails)
    forall a. HscEnv -> Hsc a -> IO a
    runHsc HscEnv
    hsc_env (Hsc (ModIface, ModDetails) -> IO (ModIface, ModDetails))
    -> Hsc (ModIface, ModDetails) -> IO (ModIface, ModDetails)
    forall a b. (a -> b) -> a -> b
    $ Maybe CoreProgram
    -> TcGblEnv -> ModSummary -> Hsc (ModIface, ModDetails)
    hscSimpleIface' Maybe CoreProgram
    mb_core_program TcGblEnv
    tc_result ModSummary
    summary

    hscSimpleIface' :: Maybe CoreProgram
                    -> TcGblEnv
                    -> ModSummary
                    -> Hsc (ModIface, ModDetails)
    hscSimpleIface' :: Maybe CoreProgram
    -> TcGblEnv -> ModSummary -> Hsc (ModIface, ModDetails)
    hscSimpleIface' Maybe CoreProgram
    mb_core_program TcGblEnv
    tc_result ModSummary
    summary = do
        hsc_env   <- Hsc HscEnv
    getHscEnv
        logger    <- getLogger
        details   <- liftIO $ mkBootModDetailsTc logger tc_result
        safe_mode <- hscGetSafeMode tc_result
        new_iface
            <- {-# SCC "MkFinalIface" #-}
               liftIO $
                   mkIfaceTc hsc_env safe_mode details summary mb_core_program tc_result
        -- And the answer is ...
        liftIO $ dumpIfaceStats hsc_env
        return (new_iface, details)

    --------------------------------------------------------------
    -- BackEnd combinators
    --------------------------------------------------------------

    -- | Compile to hard-code.
    hscGenHardCode :: HscEnv -> CgGuts -> ModLocation -> FilePath
                   -> IO (FilePath, Maybe FilePath, [(ForeignSrcLang, FilePath)], Maybe StgCgInfos, Maybe CmmCgInfos )
                    -- ^ @Just f@ <=> _stub.c is f
    hscGenHardCode :: HscEnv
    -> CgGuts
    -> ModLocation
    -> [Char]
    -> IO
         ([Char], Maybe [Char], [(ForeignSrcLang, [Char])],
          Maybe StgCgInfos, Maybe CmmCgInfos)
    hscGenHardCode HscEnv
    hsc_env CgGuts
    cgguts ModLocation
    mod_loc [Char]
    output_filename = do
            let CgGuts{ cg_module :: CgGuts -> Module
    cg_module   = Module
    this_mod,
                        cg_binds :: CgGuts -> CoreProgram
    cg_binds    = CoreProgram
    core_binds,
                        cg_ccs :: CgGuts -> [CostCentre]
    cg_ccs      = [CostCentre]
    local_ccs
                        } = CgGuts
    cgguts
                dflags :: DynFlags
    dflags = HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env
                logger :: Logger
    logger = HscEnv -> Logger
    hsc_logger HscEnv
    hsc_env

            -------------------
            -- ADD IMPLICIT BINDINGS
            -- NB: we must feed mkImplicitBinds through corePrep too
            -- so that they are suitably cloned and eta-expanded
            let cp_pgm_cfg :: CorePrepPgmConfig
                cp_pgm_cfg :: CorePrepPgmConfig
    cp_pgm_cfg = DynFlags -> [Id] -> CorePrepPgmConfig
    initCorePrepPgmConfig (HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env)
                                                   (InteractiveContext -> [Id]
    interactiveInScope (InteractiveContext -> [Id]) -> InteractiveContext -> [Id]
    forall a b. (a -> b) -> a -> b
    $ HscEnv -> InteractiveContext
    hsc_IC HscEnv
    hsc_env)
            binds_with_implicits <- CorePrepPgmConfig
    -> ModLocation -> [TyCon] -> CoreProgram -> IO CoreProgram
    addImplicitBinds CorePrepPgmConfig
    cp_pgm_cfg ModLocation
    mod_loc (CgGuts -> [TyCon]
    cg_tycons CgGuts
    cgguts) CoreProgram
    core_binds

            -------------------
            -- INSERT LATE COST CENTRES, based on the provided flags.
            --
            -- If -fprof-late-inline is enabled, we will skip adding CCs on any
            -- top-level bindings here (via shortcut in `addLateCostCenters`), since
            -- it will have already added a superset of the CCs we would add here.
            let
              late_cc_config :: LateCCConfig
              late_cc_config =
                LateCCConfig
                  { lateCCConfig_whichBinds :: LateCCBindSpec
    lateCCConfig_whichBinds =
                      if GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_ProfLateInlineCcs DynFlags
    dflags then
                        LateCCBindSpec
    LateCCNone
                      else if GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_ProfLateCcs DynFlags
    dflags then
                        LateCCBindSpec
    LateCCBinds
                      else if GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_ProfLateOverloadedCcs DynFlags
    dflags then
                        LateCCBindSpec
    LateCCOverloadedBinds
                      else
                        LateCCBindSpec
    LateCCNone
                  , lateCCConfig_overloadedCalls :: Bool
    lateCCConfig_overloadedCalls =
                      GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_ProfLateoverloadedCallsCCs DynFlags
    dflags
                  , lateCCConfig_env :: LateCCEnv
    lateCCConfig_env =
                      LateCCEnv
                        { lateCCEnv_module :: Module
    lateCCEnv_module = Module
    this_mod
                        , lateCCEnv_file :: Maybe FastString
    lateCCEnv_file = [Char] -> FastString
    fsLit ([Char] -> FastString) -> Maybe [Char] -> Maybe FastString
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> ModLocation -> Maybe [Char]
    ml_hs_file ModLocation
    mod_loc
                        , lateCCEnv_countEntries :: Bool
    lateCCEnv_countEntries= GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_ProfCountEntries DynFlags
    dflags
                        , lateCCEnv_collectCCs :: Bool
    lateCCEnv_collectCCs = Bool
    True
                        }
                  }

            (late_cc_binds, late_cc_state) <-
              addLateCostCenters logger late_cc_config binds_with_implicits

            when (dopt Opt_D_dump_late_cc dflags || dopt Opt_D_verbose_core2core dflags) $
              putDumpFileMaybe logger Opt_D_dump_late_cc "LateCC" FormatCore (vcat (map ppr late_cc_binds))

            -------------------
            -- RUN LATE PLUGINS
            -- This is the last use of the CgGuts in a compilation.
            -- From now on, we just use the bits we need.
            ( CgGuts
                { cg_tycons        = tycons,
                  cg_foreign       = foreign_stubs0,
                  cg_foreign_files = foreign_files,
                  cg_dep_pkgs      = dependencies,
                  cg_spt_entries   = spt_entries,
                  cg_binds         = binds_to_prep,
                  cg_ccs           = late_local_ccs
                }
              , _
              ) <-
              {-# SCC latePlugins #-}
              withTiming
                logger
                (text "LatePlugins"<+>brackets (ppr this_mod))
                (const ()) $
                withPlugins (hsc_plugins hsc_env)
                  (($ hsc_env) . latePlugin)
                    ( cgguts
                        { cg_binds = late_cc_binds
                        , cg_ccs = S.toList (lateCCState_ccs late_cc_state) ++ local_ccs
                        }
                    , lateCCState_ccState late_cc_state
                    )

            let
              hooks  = HscEnv -> Hooks
    hsc_hooks HscEnv
    hsc_env
              tmpfs  = HscEnv -> TmpFs
    hsc_tmpfs HscEnv
    hsc_env
              llvm_config = HscEnv -> LlvmConfigCache
    hsc_llvm_config HscEnv
    hsc_env
              profile = DynFlags -> Profile
    targetProfile DynFlags
    dflags

            -------------------
            -- PREPARE FOR CODE GENERATION
            -- Do saturation and convert to A-normal form
            cp_cfg <- initCorePrepConfig hsc_env
            (prepd_binds) <- {-# SCC "CorePrep" #-}
                             corePrepPgm
                               (hsc_logger hsc_env) cp_cfg cp_pgm_cfg
                               this_mod binds_to_prep

            -----------------  Convert to STG ------------------
            (stg_binds_with_deps, denv, (caf_ccs, caf_cc_stacks), stg_cg_infos)
                <- {-# SCC "CoreToStg" #-}
                   withTiming logger
                       (text "CoreToStg"<+>brackets (ppr this_mod))
                       (\([(CgStgTopBinding, IdSet)]
    a, InfoTableProvMap
    b, ([CostCentre]
    c,[CostCentreStack]
    d), StgCgInfos
    tag_env) ->
                            [(CgStgTopBinding, IdSet)]
    a [(CgStgTopBinding, IdSet)] -> InfoTableProvMap -> InfoTableProvMap
    forall a b. [a] -> b -> b
    `seqList`
                            InfoTableProvMap
    b InfoTableProvMap -> () -> ()
    forall a b. a -> b -> b
    `seq`
                            [CostCentre]
    c [CostCentre] -> [CostCentreStack] -> [CostCentreStack]
    forall a b. [a] -> b -> b
    `seqList`
                            [CostCentreStack]
    d [CostCentreStack] -> () -> ()
    forall a b. [a] -> b -> b
    `seqList`
                            ((TagSig -> ()) -> StgCgInfos -> ()
    forall {k} elt (key :: k). (elt -> ()) -> UniqFM key elt -> ()
    seqEltsUFM (TagSig -> ()
    seqTagSig) StgCgInfos
    tag_env))
                       (myCoreToStg logger dflags (interactiveInScope (hsc_IC hsc_env)) False this_mod mod_loc prepd_binds)

            let (stg_binds,_stg_deps) = unzip stg_binds_with_deps

            let cost_centre_info =
                  ([CostCentre]
    late_local_ccs [CostCentre] -> [CostCentre] -> [CostCentre]
    forall a. [a] -> [a] -> [a]
    ++ [CostCentre]
    caf_ccs, [CostCentreStack]
    caf_cc_stacks)
                platform = DynFlags -> Platform
    targetPlatform DynFlags
    dflags
                prof_init
                  | DynFlags -> Bool
    sccProfilingEnabled DynFlags
    dflags = Platform -> Module -> ([CostCentre], [CostCentreStack]) -> CStub
    profilingInitCode Platform
    platform Module
    this_mod ([CostCentre], [CostCentreStack])
    cost_centre_info
                  | Bool
    otherwise = CStub
    forall a. Monoid a => a
    mempty

            ------------------  Code generation ------------------
            -- The back-end is streamed: each top-level function goes
            -- from Stg all the way to asm before dealing with the next
            -- top-level function, so withTiming isn't very useful here.
            -- Hence we have one withTiming for the whole backend, the
            -- next withTiming after this will be "Assembler" (hard code only).
            withTiming logger (text "CodeGen"<+>brackets (ppr this_mod)) (const ())
             $ case backendCodeOutput (backend dflags) of
                DefunctionalizedCodeOutput
    JSCodeOutput ->
                  do
                  let js_config :: StgToJSConfig
    js_config = DynFlags -> StgToJSConfig
    initStgToJSConfig DynFlags
    dflags

                      -- The JavaScript backend does not create CmmCgInfos like the Cmm backend,
                      -- but it is needed for writing the interface file. Here we compute a very
                      -- conservative but correct value.
                      lf_infos :: GenStgTopBinding pass -> [(Name, LambdaFormInfo)]
    lf_infos (StgTopLifted (StgNonRec BinderP pass
    b GenStgRhs pass
    _)) = [(Id -> Name
    idName Id
    BinderP pass
    b, Bool -> LambdaFormInfo
    LFUnknown Bool
    True)]
                      lf_infos (StgTopLifted (StgRec [(BinderP pass, GenStgRhs pass)]
    bs))     = ((Id, GenStgRhs pass) -> (Name, LambdaFormInfo))
    -> [(Id, GenStgRhs pass)] -> [(Name, LambdaFormInfo)]
    forall a b. (a -> b) -> [a] -> [b]
    map (\(Id
    b,GenStgRhs pass
    _) -> (Id -> Name
    idName Id
    b, Bool -> LambdaFormInfo
    LFUnknown Bool
    True)) [(Id, GenStgRhs pass)]
    [(BinderP pass, GenStgRhs pass)]
    bs
                      lf_infos (StgTopStringLit Id
    b ByteString
    _)          = [(Id -> Name
    idName Id
    b, LambdaFormInfo
    LFUnlifted)]

                      cmm_cg_infos :: CmmCgInfos
    cmm_cg_infos  = CmmCgInfos
                        { cgNonCafs :: NonCaffySet
    cgNonCafs = NonCaffySet
    forall a. Monoid a => a
    mempty
                        , cgLFInfos :: ModuleLFInfos
    cgLFInfos = [(Name, LambdaFormInfo)] -> ModuleLFInfos
    forall a. [(Name, a)] -> NameEnv a
    mkNameEnv ((CgStgTopBinding -> [(Name, LambdaFormInfo)])
    -> [CgStgTopBinding] -> [(Name, LambdaFormInfo)]
    forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
    concatMap CgStgTopBinding -> [(Name, LambdaFormInfo)]
    forall {pass :: StgPass}.
    (BinderP pass ~ Id) =>
    GenStgTopBinding pass -> [(Name, LambdaFormInfo)]
    lf_infos [CgStgTopBinding]
    stg_binds)
                        , cgIPEStub :: CStub
    cgIPEStub = CStub
    forall a. Monoid a => a
    mempty
                        }
                      stub_c_exists :: Maybe a
    stub_c_exists = Maybe a
    forall a. Maybe a
    Nothing
                      foreign_fps :: [a]
    foreign_fps   = []

                  Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_dump_stg_final [Char]
    "Final STG:" DumpFormat
    FormatSTG
                      (StgPprOpts -> [CgStgTopBinding] -> SDoc
    forall (pass :: StgPass).
    OutputablePass pass =>
    StgPprOpts -> [GenStgTopBinding pass] -> SDoc
    pprGenStgTopBindings (DynFlags -> StgPprOpts
    initStgPprOpts DynFlags
    dflags) [CgStgTopBinding]
    stg_binds)

                  -- do the unfortunately effectual business
                  Logger
    -> StgToJSConfig
    -> [CgStgTopBinding]
    -> Module
    -> [SptEntry]
    -> ForeignStubs
    -> ([CostCentre], [CostCentreStack])
    -> [Char]
    -> IO ()
    stgToJS Logger
    logger StgToJSConfig
    js_config [CgStgTopBinding]
    stg_binds Module
    this_mod [SptEntry]
    spt_entries ForeignStubs
    foreign_stubs0 ([CostCentre], [CostCentreStack])
    cost_centre_info [Char]
    output_filename
                  ([Char], Maybe [Char], [(ForeignSrcLang, [Char])],
     Maybe StgCgInfos, Maybe CmmCgInfos)
    -> IO
         ([Char], Maybe [Char], [(ForeignSrcLang, [Char])],
          Maybe StgCgInfos, Maybe CmmCgInfos)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ([Char]
    output_filename, Maybe [Char]
    forall a. Maybe a
    stub_c_exists, [(ForeignSrcLang, [Char])]
    forall a. [a]
    foreign_fps, StgCgInfos -> Maybe StgCgInfos
    forall a. a -> Maybe a
    Just StgCgInfos
    stg_cg_infos, CmmCgInfos -> Maybe CmmCgInfos
    forall a. a -> Maybe a
    Just CmmCgInfos
    cmm_cg_infos)

                DefunctionalizedCodeOutput
    _          ->
                  do
                  cmms <- {-# SCC "StgToCmm" #-}
                    HscEnv
    -> Module
    -> InfoTableProvMap
    -> [TyCon]
    -> ([CostCentre], [CostCentreStack])
    -> [CgStgTopBinding]
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos)
    doCodeGen HscEnv
    hsc_env Module
    this_mod InfoTableProvMap
    denv [TyCon]
    tycons
                    ([CostCentre], [CostCentreStack])
    cost_centre_info
                    [CgStgTopBinding]
    stg_binds

                  ------------------  Code output -----------------------
                  rawcmms0 <- {-# SCC "cmmToRawCmm" #-}
                    case cmmToRawCmmHook hooks of
                      Maybe
      (DynFlags
       -> Maybe Module
       -> CgStream
            [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
       -> IO
            (CgStream
               [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
               CmmCgInfos))
    Nothing -> Logger
    -> Profile
    -> CgStream
         [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
            CmmCgInfos)
    forall a.
    Logger
    -> Profile
    -> CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] a
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph] a)
    cmmToRawCmm Logger
    logger Profile
    profile CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    cmms
                      Just DynFlags
    -> Maybe Module
    -> CgStream
         [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
            CmmCgInfos)
    h  -> DynFlags
    -> Maybe Module
    -> CgStream
         [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
            CmmCgInfos)
    h DynFlags
    dflags (Module -> Maybe Module
    forall a. a -> Maybe a
    Just Module
    this_mod) CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    cmms

                  let dump [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    a = do
                        Bool -> IO () -> IO ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    unless ([GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> Bool
    forall a. [a] -> Bool
    forall (t :: * -> *) a. Foldable t => t a -> Bool
    null [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    a) (IO () -> IO ()) -> IO () -> IO ()
    forall a b. (a -> b) -> a -> b
    $ Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_dump_cmm_raw [Char]
    "Raw Cmm" DumpFormat
    FormatCMM (Platform
    -> [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> SDoc
    forall env a. OutputableP env a => env -> a -> SDoc
    pdoc Platform
    platform [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    a)
                        [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    a
                      rawcmms1 = ([GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
     -> UniqDSMT
          IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph])
    -> CgStream
         [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
         CmmCgInfos
    -> CgStream
         [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
         CmmCgInfos
    forall (m :: * -> *) a b x.
    Monad m =>
    (a -> m b) -> Stream m a x -> Stream m b x
    Stream.mapM (IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> UniqDSMT
         IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    forall a. IO a -> UniqDSMT IO a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
     -> UniqDSMT
          IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph])
    -> ([GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
        -> IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph])
    -> [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> UniqDSMT
         IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    dump) CgStream
      [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
      CmmCgInfos
    rawcmms0

                  let foreign_stubs CmmCgInfos
    st = ForeignStubs
    foreign_stubs0
                                         ForeignStubs -> CStub -> ForeignStubs
    `appendStubC` CStub
    prof_init
                                         ForeignStubs -> CStub -> ForeignStubs
    `appendStubC` CmmCgInfos -> CStub
    cgIPEStub CmmCgInfos
    st

                  (output_filename, (_stub_h_exists, stub_c_exists), foreign_fps, cmm_cg_infos)
                      <- {-# SCC "codeOutput" #-}
                        codeOutput logger tmpfs llvm_config dflags (hsc_units hsc_env) this_mod output_filename mod_loc
                        foreign_stubs foreign_files dependencies (initDUniqSupply 'n' 0) rawcmms1
                  return  ( output_filename, stub_c_exists, foreign_fps
                          , Just stg_cg_infos, Just cmm_cg_infos)

    -- The part of CgGuts that we need for HscInteractive
    data CgInteractiveGuts = CgInteractiveGuts { CgInteractiveGuts -> Module
    cgi_module :: Module
                                               , CgInteractiveGuts -> CoreProgram
    cgi_binds  :: CoreProgram
                                               , CgInteractiveGuts -> [TyCon]
    cgi_tycons :: [TyCon]
                                               , CgInteractiveGuts -> ForeignStubs
    cgi_foreign :: ForeignStubs
                                               , CgInteractiveGuts -> [(ForeignSrcLang, [Char])]
    cgi_foreign_files :: [(ForeignSrcLang, FilePath)]
                                               , CgInteractiveGuts -> Maybe ModBreaks
    cgi_modBreaks ::  Maybe ModBreaks
                                               , CgInteractiveGuts -> [SptEntry]
    cgi_spt_entries :: [SptEntry]
                                               }

    mkCgInteractiveGuts :: CgGuts -> CgInteractiveGuts
    mkCgInteractiveGuts :: CgGuts -> CgInteractiveGuts
    mkCgInteractiveGuts CgGuts{Module
    cg_module :: CgGuts -> Module
    cg_module :: Module
    cg_module, CoreProgram
    cg_binds :: CgGuts -> CoreProgram
    cg_binds :: CoreProgram
    cg_binds, [TyCon]
    cg_tycons :: CgGuts -> [TyCon]
    cg_tycons :: [TyCon]
    cg_tycons, ForeignStubs
    cg_foreign :: CgGuts -> ForeignStubs
    cg_foreign :: ForeignStubs
    cg_foreign, [(ForeignSrcLang, [Char])]
    cg_foreign_files :: CgGuts -> [(ForeignSrcLang, [Char])]
    cg_foreign_files :: [(ForeignSrcLang, [Char])]
    cg_foreign_files, Maybe ModBreaks
    cg_modBreaks :: Maybe ModBreaks
    cg_modBreaks :: CgGuts -> Maybe ModBreaks
    cg_modBreaks, [SptEntry]
    cg_spt_entries :: CgGuts -> [SptEntry]
    cg_spt_entries :: [SptEntry]
    cg_spt_entries}
      = Module
    -> CoreProgram
    -> [TyCon]
    -> ForeignStubs
    -> [(ForeignSrcLang, [Char])]
    -> Maybe ModBreaks
    -> [SptEntry]
    -> CgInteractiveGuts
    CgInteractiveGuts Module
    cg_module CoreProgram
    cg_binds [TyCon]
    cg_tycons ForeignStubs
    cg_foreign [(ForeignSrcLang, [Char])]
    cg_foreign_files Maybe ModBreaks
    cg_modBreaks [SptEntry]
    cg_spt_entries

    hscInteractive :: HscEnv
                   -> CgInteractiveGuts
                   -> ModLocation
                   -> IO (Maybe FilePath, CompiledByteCode) -- ^ .c stub path (if any) and ByteCode
    hscInteractive :: HscEnv
    -> CgInteractiveGuts
    -> ModLocation
    -> IO (Maybe [Char], CompiledByteCode)
    hscInteractive HscEnv
    hsc_env CgInteractiveGuts
    cgguts ModLocation
    mod_loc = do
        let dflags :: DynFlags
    dflags = HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env
        let logger :: Logger
    logger = HscEnv -> Logger
    hsc_logger HscEnv
    hsc_env
        let tmpfs :: TmpFs
    tmpfs  = HscEnv -> TmpFs
    hsc_tmpfs HscEnv
    hsc_env
        let CgInteractiveGuts{ -- This is the last use of the ModGuts in a compilation.
                    -- From now on, we just use the bits we need.
                   cgi_module :: CgInteractiveGuts -> Module
    cgi_module   = Module
    this_mod,
                   cgi_binds :: CgInteractiveGuts -> CoreProgram
    cgi_binds    = CoreProgram
    core_binds,
                   cgi_tycons :: CgInteractiveGuts -> [TyCon]
    cgi_tycons   = [TyCon]
    tycons,
                   cgi_foreign :: CgInteractiveGuts -> ForeignStubs
    cgi_foreign  = ForeignStubs
    foreign_stubs,
                   cgi_modBreaks :: CgInteractiveGuts -> Maybe ModBreaks
    cgi_modBreaks = Maybe ModBreaks
    mod_breaks,
                   cgi_spt_entries :: CgInteractiveGuts -> [SptEntry]
    cgi_spt_entries = [SptEntry]
    spt_entries } = CgInteractiveGuts
    cgguts

        -------------------
        -- ADD IMPLICIT BINDINGS
        let cp_pgm_cfg :: CorePrepPgmConfig
            cp_pgm_cfg :: CorePrepPgmConfig
    cp_pgm_cfg = DynFlags -> [Id] -> CorePrepPgmConfig
    initCorePrepPgmConfig (HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env)
                                               (InteractiveContext -> [Id]
    interactiveInScope (InteractiveContext -> [Id]) -> InteractiveContext -> [Id]
    forall a b. (a -> b) -> a -> b
    $ HscEnv -> InteractiveContext
    hsc_IC HscEnv
    hsc_env)
        binds_to_prep <- CorePrepPgmConfig
    -> ModLocation -> [TyCon] -> CoreProgram -> IO CoreProgram
    addImplicitBinds CorePrepPgmConfig
    cp_pgm_cfg ModLocation
    mod_loc [TyCon]
    tycons CoreProgram
    core_binds

        -------------------
        -- PREPARE FOR CODE GENERATION
        -- Do saturation and convert to A-normal form
        cp_cfg <- initCorePrepConfig hsc_env
        prepd_binds <- {-# SCC "CorePrep" #-}
                       corePrepPgm (hsc_logger hsc_env) cp_cfg cp_pgm_cfg
                                   this_mod binds_to_prep

        -- The stg cg info only provides a runtime benfit, but is not requires so we just
        -- omit it here
        (stg_binds_with_deps, _infotable_prov, _caf_ccs__caf_cc_stacks, _ignore_stg_cg_infos)
          <- {-# SCC "CoreToStg" #-}
              myCoreToStg logger dflags (interactiveInScope (hsc_IC hsc_env)) True this_mod mod_loc prepd_binds

        let (stg_binds,_stg_deps) = unzip stg_binds_with_deps

        -----------------  Generate byte code ------------------
        comp_bc <- byteCodeGen hsc_env this_mod stg_binds tycons mod_breaks spt_entries

        ------------------ Create f-x-dynamic C-side stuff -----
        (_istub_h_exists, istub_c_exists)
            <- outputForeignStubs logger tmpfs dflags (hsc_units hsc_env) this_mod mod_loc foreign_stubs
        return (istub_c_exists, comp_bc)

    -- | Compile Core bindings and foreign inputs that were loaded from an
    -- interface, to produce bytecode and potential foreign objects for the purpose
    -- of linking splices.
    generateByteCode :: HscEnv
      -> CgInteractiveGuts
      -> ModLocation
      -> IO (CompiledByteCode, [FilePath])
    generateByteCode :: HscEnv
    -> CgInteractiveGuts
    -> ModLocation
    -> IO (CompiledByteCode, [[Char]])
    generateByteCode HscEnv
    hsc_env CgInteractiveGuts
    cgguts ModLocation
    mod_location = do
      (hasStub, comp_bc) <- HscEnv
    -> CgInteractiveGuts
    -> ModLocation
    -> IO (Maybe [Char], CompiledByteCode)
    hscInteractive HscEnv
    hsc_env CgInteractiveGuts
    cgguts ModLocation
    mod_location
      compile_for_interpreter hsc_env $ \ HscEnv
    i_env -> do
        stub_o <- ([Char] -> IO [Char]) -> Maybe [Char] -> IO (Maybe [Char])
    forall (t :: * -> *) (f :: * -> *) a b.
    (Traversable t, Applicative f) =>
    (a -> f b) -> t a -> f (t b)
    forall (f :: * -> *) a b.
    Applicative f =>
    (a -> f b) -> Maybe a -> f (Maybe b)
    traverse (HscEnv -> ForeignSrcLang -> [Char] -> IO [Char]
    compileForeign HscEnv
    i_env ForeignSrcLang
    LangC) Maybe [Char]
    hasStub
        foreign_files_o <- traverse (uncurry (compileForeign i_env)) (cgi_foreign_files cgguts)
        pure (comp_bc, maybeToList stub_o ++ foreign_files_o)

    generateFreshByteCode :: HscEnv
      -> ModuleName
      -> CgInteractiveGuts
      -> ModLocation
      -> IO Linkable
    generateFreshByteCode :: HscEnv
    -> ModuleName -> CgInteractiveGuts -> ModLocation -> IO Linkable
    generateFreshByteCode HscEnv
    hsc_env ModuleName
    mod_name CgInteractiveGuts
    cgguts ModLocation
    mod_location = do
      bco_time <- IO UTCTime
    getCurrentTime
      (bcos, fos) <- generateByteCode hsc_env cgguts mod_location
      return $!
        Linkable bco_time
        (mkHomeModule (hsc_home_unit hsc_env) mod_name)
        (BCOs bcos :| [DotO fo ForeignObject | fo <- fos])
    ------------------------------

    hscCompileCmmFile :: HscEnv -> FilePath -> FilePath -> FilePath -> IO (Maybe FilePath)
    hscCompileCmmFile :: HscEnv -> [Char] -> [Char] -> [Char] -> IO (Maybe [Char])
    hscCompileCmmFile HscEnv
    hsc_env [Char]
    original_filename [Char]
    filename [Char]
    output_filename = HscEnv -> Hsc (Maybe [Char]) -> IO (Maybe [Char])
    forall a. HscEnv -> Hsc a -> IO a
    runHsc HscEnv
    hsc_env (Hsc (Maybe [Char]) -> IO (Maybe [Char]))
    -> Hsc (Maybe [Char]) -> IO (Maybe [Char])
    forall a b. (a -> b) -> a -> b
    $ do
        let dflags :: DynFlags
    dflags   = HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env
            logger :: Logger
    logger   = HscEnv -> Logger
    hsc_logger HscEnv
    hsc_env
            hooks :: Hooks
    hooks    = HscEnv -> Hooks
    hsc_hooks HscEnv
    hsc_env
            tmpfs :: TmpFs
    tmpfs    = HscEnv -> TmpFs
    hsc_tmpfs HscEnv
    hsc_env
            profile :: Profile
    profile  = DynFlags -> Profile
    targetProfile DynFlags
    dflags
            home_unit :: HomeUnit
    home_unit = HscEnv -> HomeUnit
    hsc_home_unit HscEnv
    hsc_env
            platform :: Platform
    platform  = DynFlags -> Platform
    targetPlatform DynFlags
    dflags
            llvm_config :: LlvmConfigCache
    llvm_config = HscEnv -> LlvmConfigCache
    hsc_llvm_config HscEnv
    hsc_env
            cmm_config :: CmmConfig
    cmm_config = DynFlags -> CmmConfig
    initCmmConfig DynFlags
    dflags
            do_info_table :: Bool
    do_info_table = GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_InfoTableMap DynFlags
    dflags
            -- Make up a module name to give the NCG. We can't pass bottom here
            -- lest we reproduce #11784.
            mod_name :: ModuleName
    mod_name = [Char] -> ModuleName
    mkModuleName ([Char] -> ModuleName) -> [Char] -> ModuleName
    forall a b. (a -> b) -> a -> b
    $ [Char]
    "Cmm$" [Char] -> [Char] -> [Char]
    forall a. [a] -> [a] -> [a]
    ++ [Char]
    original_filename
            cmm_mod :: Module
    cmm_mod = HomeUnit -> ModuleName -> Module
    mkHomeModule HomeUnit
    home_unit ModuleName
    mod_name
            cmmpConfig :: CmmParserConfig
    cmmpConfig = DynFlags -> CmmParserConfig
    initCmmParserConfig DynFlags
    dflags
        (dcmm, ipe_ents) <- IO (Messages GhcMessage, Maybe (DCmmGroup, [InfoProvEnt]))
    -> Hsc (DCmmGroup, [InfoProvEnt])
    forall a. IO (Messages GhcMessage, Maybe a) -> Hsc a
    ioMsgMaybe
                   (IO (Messages GhcMessage, Maybe (DCmmGroup, [InfoProvEnt]))
     -> Hsc (DCmmGroup, [InfoProvEnt]))
    -> IO (Messages GhcMessage, Maybe (DCmmGroup, [InfoProvEnt]))
    -> Hsc (DCmmGroup, [InfoProvEnt])
    forall a b. (a -> b) -> a -> b
    $ do
                      (warns,errs,cmm) <- Logger
    -> SDoc
    -> ((Messages PsWarning, Messages PsWarning,
         Maybe (DCmmGroup, [InfoProvEnt]))
        -> ())
    -> IO
         (Messages PsWarning, Messages PsWarning,
          Maybe (DCmmGroup, [InfoProvEnt]))
    -> IO
         (Messages PsWarning, Messages PsWarning,
          Maybe (DCmmGroup, [InfoProvEnt]))
    forall (m :: * -> *) a.
    MonadIO m =>
    Logger -> SDoc -> (a -> ()) -> m a -> m a
    withTiming Logger
    logger ([Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "ParseCmm"SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <+>SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc
    brackets ([Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    filename)) (\(Messages PsWarning, Messages PsWarning,
     Maybe (DCmmGroup, [InfoProvEnt]))
    _ -> ())
                                           (IO
       (Messages PsWarning, Messages PsWarning,
        Maybe (DCmmGroup, [InfoProvEnt]))
     -> IO
          (Messages PsWarning, Messages PsWarning,
           Maybe (DCmmGroup, [InfoProvEnt])))
    -> IO
         (Messages PsWarning, Messages PsWarning,
          Maybe (DCmmGroup, [InfoProvEnt]))
    -> IO
         (Messages PsWarning, Messages PsWarning,
          Maybe (DCmmGroup, [InfoProvEnt]))
    forall a b. (a -> b) -> a -> b
    $ CmmParserConfig
    -> Module
    -> HomeUnit
    -> [Char]
    -> IO
         (Messages PsWarning, Messages PsWarning,
          Maybe (DCmmGroup, [InfoProvEnt]))
    parseCmmFile CmmParserConfig
    cmmpConfig Module
    cmm_mod HomeUnit
    home_unit [Char]
    filename
                      let msgs = Messages PsWarning
    warns Messages PsWarning -> Messages PsWarning -> Messages PsWarning
    forall e. Messages e -> Messages e -> Messages e
    `unionMessages` Messages PsWarning
    errs
                      return (GhcPsMessage <$> msgs, cmm)
        -- Probably need to rename cmm here
        let cmm = DCmmGroup -> CmmGroup
    removeDeterm DCmmGroup
    dcmm
        liftIO $ do
            putDumpFileMaybe logger Opt_D_dump_cmm_verbose_by_proc "Parsed Cmm" FormatCMM (pdoc platform cmm)

            -- Compile decls in Cmm files one decl at a time, to avoid re-ordering
            -- them in SRT analysis.
            --
            -- Re-ordering here causes breakage when booting with C backend because
            -- in C we must declare before use, but SRT algorithm is free to
            -- re-order [A, B] (B refers to A) when A is not CAFFY and return [B, A]
            ((_,dus1), cmmgroup) <- second concat <$>
              mapAccumLM (\(ModuleSRTInfo
    msrt0, DUniqSupply
    dus0) GenCmmDecl CmmStatics CmmTopInfo CmmGraph
    cmm -> do
                ((msrt1, cmm'), dus1) <- Logger
    -> CmmConfig
    -> ModuleSRTInfo
    -> CmmGroup
    -> DUniqSupply
    -> IO
         ((ModuleSRTInfo, [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]),
          DUniqSupply)
    cmmPipeline Logger
    logger CmmConfig
    cmm_config ModuleSRTInfo
    msrt0 [GenCmmDecl CmmStatics CmmTopInfo CmmGraph
    cmm] DUniqSupply
    dus0
                return ((msrt1, dus1), cmm')) (emptySRT cmm_mod, initDUniqSupply 'u' 0) cmm

            unless (null cmmgroup) $
              putDumpFileMaybe logger Opt_D_dump_cmm "Output Cmm"
                FormatCMM (pdoc platform cmmgroup)

            rawCmms0 <- case cmmToRawCmmHook hooks of
              Maybe
      (DynFlags
       -> Maybe Module
       -> CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] ()
       -> IO
            (CgStream
               [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph] ()))
    Nothing -> Logger
    -> Profile
    -> CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] ()
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph] ())
    forall a.
    Logger
    -> Profile
    -> CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] a
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph] a)
    cmmToRawCmm Logger
    logger Profile
    profile ([GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    -> CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] ()
    forall (m :: * -> *) a. Monad m => a -> Stream m a ()
    Stream.yield [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    cmmgroup)
              Just DynFlags
    -> Maybe Module
    -> CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] ()
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph] ())
    h  -> DynFlags
    -> Maybe Module
    -> CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] ()
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph] ())
    h           DynFlags
    dflags Maybe Module
    forall a. Maybe a
    Nothing ([GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    -> CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] ()
    forall (m :: * -> *) a. Monad m => a -> Stream m a ()
    Stream.yield [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    cmmgroup)

            let dump [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    a = do
                  Bool -> IO () -> IO ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    unless ([GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> Bool
    forall a. [a] -> Bool
    forall (t :: * -> *) a. Foldable t => t a -> Bool
    null [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    a) (IO () -> IO ()) -> IO () -> IO ()
    forall a b. (a -> b) -> a -> b
    $ Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_dump_cmm_raw [Char]
    "Raw Cmm" DumpFormat
    FormatCMM (Platform
    -> [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> SDoc
    forall env a. OutputableP env a => env -> a -> SDoc
    pdoc Platform
    platform [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    a)
                  [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    a
                rawCmms = ([GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
     -> UniqDSMT
          IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph])
    -> CgStream
         [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph] ()
    -> CgStream
         [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph] ()
    forall (m :: * -> *) a b x.
    Monad m =>
    (a -> m b) -> Stream m a x -> Stream m b x
    Stream.mapM (IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> UniqDSMT
         IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    forall a. IO a -> UniqDSMT IO a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
     -> UniqDSMT
          IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph])
    -> ([GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
        -> IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph])
    -> [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> UniqDSMT
         IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    -> IO [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph]
    dump) CgStream
      [GenCmmDecl RawCmmStatics (LabelMap RawCmmStatics) CmmGraph] ()
    rawCmms0

            let foreign_stubs ()
    _
                  | Bool -> Bool
    not (Bool -> Bool) -> Bool -> Bool
    forall a b. (a -> b) -> a -> b
    $ [InfoProvEnt] -> Bool
    forall a. [a] -> Bool
    forall (t :: * -> *) a. Foldable t => t a -> Bool
    null [InfoProvEnt]
    ipe_ents =
                      let ip_init :: CStub
    ip_init = Bool -> Platform -> Module -> CStub
    ipInitCode Bool
    do_info_table Platform
    platform Module
    cmm_mod
                      in ForeignStubs
    NoStubs ForeignStubs -> CStub -> ForeignStubs
    `appendStubC` CStub
    ip_init
                  | Bool
    otherwise     = ForeignStubs
    NoStubs
            (_output_filename, (_stub_h_exists, stub_c_exists), _foreign_fps, _caf_infos)
              <- codeOutput logger tmpfs llvm_config dflags (hsc_units hsc_env) cmm_mod output_filename no_loc foreign_stubs [] S.empty
                 dus1 rawCmms
            return stub_c_exists
      where
        no_loc :: ModLocation
    no_loc = OsPathModLocation
            { ml_hs_file_ospath :: Maybe OsPath
    ml_hs_file_ospath  = OsPath -> Maybe OsPath
    forall a. a -> Maybe a
    Just (OsPath -> Maybe OsPath) -> OsPath -> Maybe OsPath
    forall a b. (a -> b) -> a -> b
    $ HasCallStack => [Char] -> OsPath
    [Char] -> OsPath
    unsafeEncodeUtf [Char]
    original_filename,
              ml_hi_file_ospath :: OsPath
    ml_hi_file_ospath  = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hscCompileCmmFile: no hi file",
              ml_obj_file_ospath :: OsPath
    ml_obj_file_ospath = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hscCompileCmmFile: no obj file",
              ml_dyn_obj_file_ospath :: OsPath
    ml_dyn_obj_file_ospath = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hscCompileCmmFile: no dyn obj file",
              ml_dyn_hi_file_ospath :: OsPath
    ml_dyn_hi_file_ospath  = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hscCompileCmmFile: no dyn obj file",
              ml_hie_file_ospath :: OsPath
    ml_hie_file_ospath = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hscCompileCmmFile: no hie file"}

    -------------------- Stuff for new code gen ---------------------

    {-
    Note [Forcing of stg_binds]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~
    The two last steps in the STG pipeline are:

    * Sorting the bindings in dependency order.
    * Annotating them with free variables.

    We want to make sure we do not keep references to unannotated STG bindings
    alive, nor references to bindings which have already been compiled to Cmm.

    We explicitly force the bindings to avoid this.

    This reduces residency towards the end of the CodeGen phase significantly
    (5-10%).
    -}

    doCodeGen :: HscEnv -> Module -> InfoTableProvMap -> [TyCon]
              -> CollectedCCs
              -> [CgStgTopBinding] -- ^ Bindings come already annotated with fvs
              -> IO (CgStream CmmGroupSRTs CmmCgInfos)
             -- Note we produce a 'Stream' of CmmGroups, so that the
             -- backend can be run incrementally.  Otherwise it generates all
             -- the C-- up front, which has a significant space cost.
    doCodeGen :: HscEnv
    -> Module
    -> InfoTableProvMap
    -> [TyCon]
    -> ([CostCentre], [CostCentreStack])
    -> [CgStgTopBinding]
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos)
    doCodeGen HscEnv
    hsc_env Module
    this_mod InfoTableProvMap
    denv [TyCon]
    tycons
                  ([CostCentre], [CostCentreStack])
    cost_centre_info [CgStgTopBinding]
    stg_binds_w_fvs = do
        let dflags :: DynFlags
    dflags     = HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env
            logger :: Logger
    logger     = HscEnv -> Logger
    hsc_logger HscEnv
    hsc_env
            hooks :: Hooks
    hooks      = HscEnv -> Hooks
    hsc_hooks  HscEnv
    hsc_env
            tmpfs :: TmpFs
    tmpfs      = HscEnv -> TmpFs
    hsc_tmpfs  HscEnv
    hsc_env
            platform :: Platform
    platform   = DynFlags -> Platform
    targetPlatform DynFlags
    dflags
            stg_ppr_opts :: StgPprOpts
    stg_ppr_opts = (DynFlags -> StgPprOpts
    initStgPprOpts DynFlags
    dflags)

        Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_dump_stg_final [Char]
    "Final STG:" DumpFormat
    FormatSTG
            (StgPprOpts -> [CgStgTopBinding] -> SDoc
    forall (pass :: StgPass).
    OutputablePass pass =>
    StgPprOpts -> [GenStgTopBinding pass] -> SDoc
    pprGenStgTopBindings StgPprOpts
    stg_ppr_opts [CgStgTopBinding]
    stg_binds_w_fvs)

        let stg_to_cmm :: DynFlags
    -> Module
    -> InfoTableProvMap
    -> [TyCon]
    -> ([CostCentre], [CostCentreStack])
    -> [CgStgTopBinding]
    -> CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    stg_to_cmm DynFlags
    dflags Module
    mod InfoTableProvMap
    a [TyCon]
    b ([CostCentre], [CostCentreStack])
    c [CgStgTopBinding]
    d = case Hooks
    -> Maybe
         (StgToCmmConfig
          -> InfoTableProvMap
          -> [TyCon]
          -> ([CostCentre], [CostCentreStack])
          -> [CgStgTopBinding]
          -> CgStream CmmGroup ModuleLFInfos)
    stgToCmmHook Hooks
    hooks of
              Maybe
      (StgToCmmConfig
       -> InfoTableProvMap
       -> [TyCon]
       -> ([CostCentre], [CostCentreStack])
       -> [CgStgTopBinding]
       -> CgStream CmmGroup ModuleLFInfos)
    Nothing -> Logger
    -> TmpFs
    -> StgToCmmConfig
    -> InfoTableProvMap
    -> [TyCon]
    -> ([CostCentre], [CostCentreStack])
    -> [CgStgTopBinding]
    -> CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    StgToCmm.codeGen Logger
    logger TmpFs
    tmpfs (DynFlags -> Module -> StgToCmmConfig
    initStgToCmmConfig DynFlags
    dflags Module
    mod) InfoTableProvMap
    a [TyCon]
    b ([CostCentre], [CostCentreStack])
    c [CgStgTopBinding]
    d
              Just StgToCmmConfig
    -> InfoTableProvMap
    -> [TyCon]
    -> ([CostCentre], [CostCentreStack])
    -> [CgStgTopBinding]
    -> CgStream CmmGroup ModuleLFInfos
    h  -> (,DetUniqFM
    emptyDetUFM) (ModuleLFInfos -> (ModuleLFInfos, DetUniqFM))
    -> CgStream CmmGroup ModuleLFInfos
    -> CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> StgToCmmConfig
    -> InfoTableProvMap
    -> [TyCon]
    -> ([CostCentre], [CostCentreStack])
    -> [CgStgTopBinding]
    -> CgStream CmmGroup ModuleLFInfos
    h          (DynFlags -> Module -> StgToCmmConfig
    initStgToCmmConfig DynFlags
    dflags Module
    mod) InfoTableProvMap
    a [TyCon]
    b ([CostCentre], [CostCentreStack])
    c [CgStgTopBinding]
    d

        let cmm_stream :: CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
            -- See Note [Forcing of stg_binds]
            cmm_stream :: CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    cmm_stream = [CgStgTopBinding]
    stg_binds_w_fvs [CgStgTopBinding]
    -> CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    -> CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    forall a b. [a] -> b -> b
    `seqList` {-# SCC "StgToCmm" #-}
                DynFlags
    -> Module
    -> InfoTableProvMap
    -> [TyCon]
    -> ([CostCentre], [CostCentreStack])
    -> [CgStgTopBinding]
    -> CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    stg_to_cmm DynFlags
    dflags Module
    this_mod InfoTableProvMap
    denv [TyCon]
    tycons ([CostCentre], [CostCentreStack])
    cost_centre_info [CgStgTopBinding]
    stg_binds_w_fvs

            -- codegen consumes a stream of CmmGroup, and produces a new
            -- stream of CmmGroup (not necessarily synchronised: one
            -- CmmGroup on input may produce many CmmGroups on output due
            -- to proc-point splitting).

        let dump1 :: CmmGroup -> IO CmmGroup
    dump1 CmmGroup
    a = do
              Bool -> IO () -> IO ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    unless (CmmGroup -> Bool
    forall a. [a] -> Bool
    forall (t :: * -> *) a. Foldable t => t a -> Bool
    null CmmGroup
    a) (IO () -> IO ()) -> IO () -> IO ()
    forall a b. (a -> b) -> a -> b
    $
                Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_dump_cmm_from_stg
                  [Char]
    "Cmm produced by codegen" DumpFormat
    FormatCMM (Platform -> CmmGroup -> SDoc
    forall env a. OutputableP env a => env -> a -> SDoc
    pdoc Platform
    platform CmmGroup
    a)
              CmmGroup -> IO CmmGroup
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return CmmGroup
    a

            ppr_stream1 :: CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    ppr_stream1 = (CmmGroup -> UniqDSMT IO CmmGroup)
    -> CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    -> CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    forall (m :: * -> *) a b x.
    Monad m =>
    (a -> m b) -> Stream m a x -> Stream m b x
    Stream.mapM (IO CmmGroup -> UniqDSMT IO CmmGroup
    forall a. IO a -> UniqDSMT IO a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO CmmGroup -> UniqDSMT IO CmmGroup)
    -> (CmmGroup -> IO CmmGroup) -> CmmGroup -> UniqDSMT IO CmmGroup
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . CmmGroup -> IO CmmGroup
    dump1) CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    cmm_stream

            cmm_config :: CmmConfig
    cmm_config = DynFlags -> CmmConfig
    initCmmConfig DynFlags
    dflags

            pipeline_stream :: CgStream CmmGroupSRTs CmmCgInfos
            pipeline_stream :: CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    pipeline_stream = do
              ((mod_srt_info, ipes, ipe_stats), (lf_infos, detRnEnv)) <-
                {-# SCC "cmmPipeline" #-}
                ((ModuleSRTInfo, Map CmmInfoTable (Maybe IpeSourceLocation),
      IPEStats)
     -> CmmGroup
     -> UniqDSMT
          IO
          ((ModuleSRTInfo, Map CmmInfoTable (Maybe IpeSourceLocation),
            IPEStats),
           [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]))
    -> (ModuleSRTInfo, Map CmmInfoTable (Maybe IpeSourceLocation),
        IPEStats)
    -> CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    -> Stream
         (UniqDSMT IO)
         [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
         ((ModuleSRTInfo, Map CmmInfoTable (Maybe IpeSourceLocation),
           IPEStats),
          (ModuleLFInfos, DetUniqFM))
    forall (m :: * -> *) a b c r.
    Monad m =>
    (c -> a -> m (c, b)) -> c -> Stream m a r -> Stream m b (c, r)
    Stream.mapAccumL_ (Logger
    -> CmmConfig
    -> (ModuleSRTInfo, Map CmmInfoTable (Maybe IpeSourceLocation),
        IPEStats)
    -> CmmGroup
    -> UniqDSMT
         IO
         ((ModuleSRTInfo, Map CmmInfoTable (Maybe IpeSourceLocation),
           IPEStats),
          [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph])
    pipeline_action Logger
    logger CmmConfig
    cmm_config) (Module -> ModuleSRTInfo
    emptySRT Module
    this_mod, Map CmmInfoTable (Maybe IpeSourceLocation)
    forall k a. Map k a
    M.empty, IPEStats
    forall a. Monoid a => a
    mempty) CgStream CmmGroup (ModuleLFInfos, DetUniqFM)
    ppr_stream1

              let nonCaffySet = SRTMap -> NonCaffySet
    srtMapNonCAFs (ModuleSRTInfo -> SRTMap
    moduleSRTMap ModuleSRTInfo
    mod_srt_info)

                  -- denv::InfoTableProvMap refers to symbols that no longer exist
                  -- if -fobject-determinism is on, since it was created before the
                  -- Cmm was renamed. Update all the symbols by renaming them with
                  -- the renaming map in that case.
                  (_drn, rn_denv)
                    | gopt Opt_ObjectDeterminism dflags = detRenameIPEMap detRnEnv denv
                    | otherwise = (detRnEnv, denv)

              cmmCgInfos <- generateCgIPEStub hsc_env this_mod rn_denv (nonCaffySet, lf_infos, ipes, ipe_stats)
              return cmmCgInfos

            pipeline_action
              :: Logger
              -> CmmConfig
              -> (ModuleSRTInfo, Map CmmInfoTable (Maybe IpeSourceLocation), IPEStats)
              -> CmmGroup
              -> UniqDSMT IO ((ModuleSRTInfo, Map CmmInfoTable (Maybe IpeSourceLocation), IPEStats), CmmGroupSRTs)
            pipeline_action :: Logger
    -> CmmConfig
    -> (ModuleSRTInfo, Map CmmInfoTable (Maybe IpeSourceLocation),
        IPEStats)
    -> CmmGroup
    -> UniqDSMT
         IO
         ((ModuleSRTInfo, Map CmmInfoTable (Maybe IpeSourceLocation),
           IPEStats),
          [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph])
    pipeline_action Logger
    logger CmmConfig
    cmm_config (ModuleSRTInfo
    mod_srt_info, Map CmmInfoTable (Maybe IpeSourceLocation)
    ipes, IPEStats
    stats) CmmGroup
    cmm_group = do
              (mod_srt_info', cmm_srts) <- (DUniqSupply
     -> IO
          ((ModuleSRTInfo, [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]),
           DUniqSupply))
    -> UniqDSMT
         IO (ModuleSRTInfo, [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph])
    forall a. (DUniqSupply -> IO (a, DUniqSupply)) -> UniqDSMT IO a
    withDUS ((DUniqSupply
      -> IO
           ((ModuleSRTInfo, [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]),
            DUniqSupply))
     -> UniqDSMT
          IO (ModuleSRTInfo, [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]))
    -> (DUniqSupply
        -> IO
             ((ModuleSRTInfo, [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]),
              DUniqSupply))
    -> UniqDSMT
         IO (ModuleSRTInfo, [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph])
    forall a b. (a -> b) -> a -> b
    $ Logger
    -> CmmConfig
    -> ModuleSRTInfo
    -> CmmGroup
    -> DUniqSupply
    -> IO
         ((ModuleSRTInfo, [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]),
          DUniqSupply)
    cmmPipeline Logger
    logger CmmConfig
    cmm_config ModuleSRTInfo
    mod_srt_info CmmGroup
    cmm_group

              -- If -finfo-table-map is enabled, we precompute a map from info
              -- tables to source locations. See Note [Mapping Info Tables to Source
              -- Positions] in GHC.Stg.Debug.
              (ipes', stats') <-
                if (gopt Opt_InfoTableMap dflags) then
                  liftIO $ lookupEstimatedTicks hsc_env ipes stats cmm_srts
                else
                  return (ipes, stats)

              return ((mod_srt_info', ipes', stats'), cmm_srts)

            dump2 :: [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    -> IO [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    dump2 [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    a = do
              Bool -> IO () -> IO ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    unless ([GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] -> Bool
    forall a. [a] -> Bool
    forall (t :: * -> *) a. Foldable t => t a -> Bool
    null [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    a) (IO () -> IO ()) -> IO () -> IO ()
    forall a b. (a -> b) -> a -> b
    $
                Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_dump_cmm [Char]
    "Output Cmm" DumpFormat
    FormatCMM (Platform -> [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] -> SDoc
    forall env a. OutputableP env a => env -> a -> SDoc
    pdoc Platform
    platform [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    a)
              [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    -> IO [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    a

        CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos)
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
     -> IO
          (CgStream
             [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos))
    -> CgStream
         [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    -> IO
         (CgStream
            [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos)
    forall a b. (a -> b) -> a -> b
    $ ([GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
     -> UniqDSMT IO [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph])
    -> CgStream
         [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    -> CgStream
         [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    forall (m :: * -> *) a b x.
    Monad m =>
    (a -> m b) -> Stream m a x -> Stream m b x
    Stream.mapM (IO [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    -> UniqDSMT IO [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    forall a. IO a -> UniqDSMT IO a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
     -> UniqDSMT IO [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph])
    -> ([GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
        -> IO [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph])
    -> [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    -> UniqDSMT IO [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    -> IO [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph]
    dump2) CgStream [GenCmmDecl RawCmmStatics CmmTopInfo CmmGraph] CmmCgInfos
    pipeline_stream

    myCoreToStg :: Logger -> DynFlags -> [Var]
                -> Bool
                -> Module -> ModLocation -> CoreProgram
                -> IO ( [(CgStgTopBinding,IdSet)] -- output program and its dependencies
                      , InfoTableProvMap
                      , CollectedCCs -- CAF cost centre info (declared and used)
                      , StgCgInfos )
    myCoreToStg :: Logger
    -> DynFlags
    -> [Id]
    -> Bool
    -> Module
    -> ModLocation
    -> CoreProgram
    -> IO
         ([(CgStgTopBinding, IdSet)], InfoTableProvMap,
          ([CostCentre], [CostCentreStack]), StgCgInfos)
    myCoreToStg Logger
    logger DynFlags
    dflags [Id]
    ic_inscope Bool
    for_bytecode Module
    this_mod ModLocation
    ml CoreProgram
    prepd_binds = do
        let ([StgTopBinding]
    stg_binds, InfoTableProvMap
    denv, ([CostCentre], [CostCentreStack])
    cost_centre_info)
             = {-# SCC "Core2Stg" #-}
               CoreToStgOpts
    -> Module
    -> ModLocation
    -> CoreProgram
    -> ([StgTopBinding], InfoTableProvMap,
        ([CostCentre], [CostCentreStack]))
    coreToStg (DynFlags -> CoreToStgOpts
    initCoreToStgOpts DynFlags
    dflags) Module
    this_mod ModLocation
    ml CoreProgram
    prepd_binds

        (stg_binds_with_fvs,stg_cg_info)
            <- {-# SCC "Stg2Stg" #-}
               Logger
    -> [Id]
    -> StgPipelineOpts
    -> Module
    -> [StgTopBinding]
    -> IO ([(CgStgTopBinding, IdSet)], StgCgInfos)
    stg2stg Logger
    logger [Id]
    ic_inscope (DynFlags -> Bool -> StgPipelineOpts
    initStgPipelineOpts DynFlags
    dflags Bool
    for_bytecode)
                       Module
    this_mod [StgTopBinding]
    stg_binds

        putDumpFileMaybe logger Opt_D_dump_stg_cg "CodeGenInput STG:" FormatSTG
            (pprGenStgTopBindings (initStgPprOpts dflags) (fmap fst stg_binds_with_fvs))

        return (stg_binds_with_fvs, denv, cost_centre_info, stg_cg_info)

    {- **********************************************************************
    %*                                                                      *
    \subsection{Compiling a do-statement}
    %*                                                                      *
    %********************************************************************* -}

    {-
    When the UnlinkedBCOExpr is linked you get an HValue of type *IO [HValue]* When
    you run it you get a list of HValues that should be the same length as the list
    of names; add them to the ClosureEnv.

    A naked expression returns a singleton Name [it]. The stmt is lifted into the
    IO monad as explained in Note [Interactively-bound Ids in GHCi] in GHC.Runtime.Context
    -}

    -- | Compile a stmt all the way to an HValue, but don't run it
    --
    -- We return Nothing to indicate an empty statement (or comment only), not a
    -- parse error.
    hscStmt :: HscEnv -> String -> IO (Maybe ([Id], ForeignHValue, FixityEnv))
    hscStmt :: HscEnv -> [Char] -> IO (Maybe ([Id], ForeignHValue, FixityEnv))
    hscStmt HscEnv
    hsc_env [Char]
    stmt = HscEnv
    -> [Char]
    -> [Char]
    -> TypeIndex
    -> IO (Maybe ([Id], ForeignHValue, FixityEnv))
    hscStmtWithLocation HscEnv
    hsc_env [Char]
    stmt [Char]
    "<interactive>" TypeIndex
    1

    -- | Compile a stmt all the way to an HValue, but don't run it
    --
    -- We return Nothing to indicate an empty statement (or comment only), not a
    -- parse error.
    hscStmtWithLocation :: HscEnv
                        -> String -- ^ The statement
                        -> String -- ^ The source
                        -> Int    -- ^ Starting line
                        -> IO ( Maybe ([Id]
                              , ForeignHValue {- IO [HValue] -}
                              , FixityEnv))
    hscStmtWithLocation :: HscEnv
    -> [Char]
    -> [Char]
    -> TypeIndex
    -> IO (Maybe ([Id], ForeignHValue, FixityEnv))
    hscStmtWithLocation HscEnv
    hsc_env0 [Char]
    stmt [Char]
    source TypeIndex
    linenumber =
      HscEnv
    -> Hsc (Maybe ([Id], ForeignHValue, FixityEnv))
    -> IO (Maybe ([Id], ForeignHValue, FixityEnv))
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env0 (Hsc (Maybe ([Id], ForeignHValue, FixityEnv))
     -> IO (Maybe ([Id], ForeignHValue, FixityEnv)))
    -> Hsc (Maybe ([Id], ForeignHValue, FixityEnv))
    -> IO (Maybe ([Id], ForeignHValue, FixityEnv))
    forall a b. (a -> b) -> a -> b
    $ do
        maybe_stmt <- [Char] -> TypeIndex -> [Char] -> Hsc (Maybe (GhciLStmt GhcPs))
    hscParseStmtWithLocation [Char]
    source TypeIndex
    linenumber [Char]
    stmt
        case maybe_stmt of
          Maybe
      (GenLocated
         SrcSpanAnnA
         (StmtLR GhcPs GhcPs (GenLocated SrcSpanAnnA (HsExpr GhcPs))))
    Nothing -> Maybe ([Id], ForeignHValue, FixityEnv)
    -> Hsc (Maybe ([Id], ForeignHValue, FixityEnv))
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return Maybe ([Id], ForeignHValue, FixityEnv)
    forall a. Maybe a
    Nothing

          Just GenLocated
      SrcSpanAnnA
      (StmtLR GhcPs GhcPs (GenLocated SrcSpanAnnA (HsExpr GhcPs)))
    parsed_stmt -> do
            hsc_env <- Hsc HscEnv
    getHscEnv
            liftIO $ hscParsedStmt hsc_env parsed_stmt

    hscParsedStmt :: HscEnv
                  -> GhciLStmt GhcPs  -- ^ The parsed statement
                  -> IO ( Maybe ([Id]
                        , ForeignHValue {- IO [HValue] -}
                        , FixityEnv))
    hscParsedStmt :: HscEnv
    -> GhciLStmt GhcPs -> IO (Maybe ([Id], ForeignHValue, FixityEnv))
    hscParsedStmt HscEnv
    hsc_env GhciLStmt GhcPs
    stmt = HscEnv
    -> Hsc (Maybe ([Id], ForeignHValue, FixityEnv))
    -> IO (Maybe ([Id], ForeignHValue, FixityEnv))
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env (Hsc (Maybe ([Id], ForeignHValue, FixityEnv))
     -> IO (Maybe ([Id], ForeignHValue, FixityEnv)))
    -> Hsc (Maybe ([Id], ForeignHValue, FixityEnv))
    -> IO (Maybe ([Id], ForeignHValue, FixityEnv))
    forall a b. (a -> b) -> a -> b
    $ do
      -- Rename and typecheck it
      (ids, tc_expr, fix_env) <- IO
      (Messages GhcMessage,
       Maybe ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv))
    -> Hsc ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv)
    forall a. IO (Messages GhcMessage, Maybe a) -> Hsc a
    ioMsgMaybe (IO
       (Messages GhcMessage,
        Maybe ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv))
     -> Hsc ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv))
    -> IO
         (Messages GhcMessage,
          Maybe ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv))
    -> Hsc ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv)
    forall a b. (a -> b) -> a -> b
    $ IO
      (Messages TcRnMessage,
       Maybe ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv))
    -> IO
         (Messages GhcMessage,
          Maybe ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv))
    forall (m :: * -> *) a.
    Monad m =>
    m (Messages TcRnMessage, a) -> m (Messages GhcMessage, a)
    hoistTcRnMessage (IO
       (Messages TcRnMessage,
        Maybe ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv))
     -> IO
          (Messages GhcMessage,
           Maybe ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv)))
    -> IO
         (Messages TcRnMessage,
          Maybe ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv))
    -> IO
         (Messages GhcMessage,
          Maybe ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv))
    forall a b. (a -> b) -> a -> b
    $ HscEnv
    -> GhciLStmt GhcPs
    -> IO
         (Messages TcRnMessage,
          Maybe ([Id], LHsExpr (GhcPass 'Typechecked), FixityEnv))
    tcRnStmt HscEnv
    hsc_env GhciLStmt GhcPs
    stmt

      -- Desugar it
      ds_expr <- ioMsgMaybe $ hoistDsMessage $ deSugarExpr hsc_env tc_expr
      liftIO (lintInteractiveExpr (text "desugar expression") hsc_env ds_expr)
      handleWarnings

      -- Then code-gen, and link it
      -- It's important NOT to have package 'interactive' as thisUnitId
      -- for linking, else we try to link 'main' and can't find it.
      -- Whereas the linker already knows to ignore 'interactive'
      let src_span = SrcLoc -> SrcSpan
    srcLocSpan SrcLoc
    interactiveSrcLoc
      (hval,_,_) <- liftIO $ hscCompileCoreExpr hsc_env src_span ds_expr

      return $ Just (ids, hval, fix_env)

    hscParseModuleWithLocation :: HscEnv -> String -> Int -> String -> IO (HsModule GhcPs)
    hscParseModuleWithLocation :: HscEnv -> [Char] -> TypeIndex -> [Char] -> IO (HsModule GhcPs)
    hscParseModuleWithLocation HscEnv
    hsc_env [Char]
    source TypeIndex
    line_num [Char]
    str = do
        L _ mod <-
          HscEnv
    -> Hsc (Located (HsModule GhcPs)) -> IO (Located (HsModule GhcPs))
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env (Hsc (Located (HsModule GhcPs)) -> IO (Located (HsModule GhcPs)))
    -> Hsc (Located (HsModule GhcPs)) -> IO (Located (HsModule GhcPs))
    forall a b. (a -> b) -> a -> b
    $
            [Char]
    -> TypeIndex
    -> P (Located (HsModule GhcPs))
    -> [Char]
    -> Hsc (Located (HsModule GhcPs))
    forall thing.
    (Outputable thing, Data thing) =>
    [Char] -> TypeIndex -> P thing -> [Char] -> Hsc thing
    hscParseThingWithLocation [Char]
    source TypeIndex
    line_num P (Located (HsModule GhcPs))
    parseModule [Char]
    str
        return mod

    hscParseDeclsWithLocation :: HscEnv -> String -> Int -> String -> IO [LHsDecl GhcPs]
    hscParseDeclsWithLocation :: HscEnv -> [Char] -> TypeIndex -> [Char] -> IO [LHsDecl GhcPs]
    hscParseDeclsWithLocation HscEnv
    hsc_env [Char]
    source TypeIndex
    line_num [Char]
    str = do
      HsModule { hsmodDecls = decls } <- HscEnv -> [Char] -> TypeIndex -> [Char] -> IO (HsModule GhcPs)
    hscParseModuleWithLocation HscEnv
    hsc_env [Char]
    source TypeIndex
    line_num [Char]
    str
      return decls

    hscParsedDecls :: HscEnv -> [LHsDecl GhcPs] -> IO ([TyThing], InteractiveContext)
    hscParsedDecls :: HscEnv -> [LHsDecl GhcPs] -> IO ([TyThing], InteractiveContext)
    hscParsedDecls HscEnv
    hsc_env [LHsDecl GhcPs]
    decls = HscEnv
    -> Hsc ([TyThing], InteractiveContext)
    -> IO ([TyThing], InteractiveContext)
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env (Hsc ([TyThing], InteractiveContext)
     -> IO ([TyThing], InteractiveContext))
    -> Hsc ([TyThing], InteractiveContext)
    -> IO ([TyThing], InteractiveContext)
    forall a b. (a -> b) -> a -> b
    $ do
        hsc_env <- Hsc HscEnv
    getHscEnv
        let interp = HscEnv -> Interp
    hscInterp HscEnv
    hsc_env

        {- Rename and typecheck it -}
        tc_gblenv <- ioMsgMaybe $ hoistTcRnMessage $ tcRnDeclsi hsc_env decls

        {- Grab the new instances -}
        -- We grab the whole environment because of the overlapping that may have
        -- been done. See the notes at the definition of InteractiveContext
        -- (ic_instances) for more details.
        let defaults = TcGblEnv -> DefaultEnv
    tcg_default TcGblEnv
    tc_gblenv

        {- Desugar it -}
        -- We use a basically null location for iNTERACTIVE
        let iNTERACTIVELoc = OsPathModLocation
                { ml_hs_file_ospath :: Maybe OsPath
    ml_hs_file_ospath   = Maybe OsPath
    forall a. Maybe a
    Nothing,
                  ml_hi_file_ospath :: OsPath
    ml_hi_file_ospath   = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hsDeclsWithLocation:ml_hi_file_ospath",
                  ml_obj_file_ospath :: OsPath
    ml_obj_file_ospath  = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hsDeclsWithLocation:ml_obj_file_ospath",
                  ml_dyn_obj_file_ospath :: OsPath
    ml_dyn_obj_file_ospath = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hsDeclsWithLocation:ml_dyn_obj_file_ospath",
                  ml_dyn_hi_file_ospath :: OsPath
    ml_dyn_hi_file_ospath = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hsDeclsWithLocation:ml_dyn_hi_file_ospath",
                  ml_hie_file_ospath :: OsPath
    ml_hie_file_ospath  = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hsDeclsWithLocation:ml_hie_file_ospath" }
        ds_result <- hscDesugar' iNTERACTIVELoc tc_gblenv

        {- Simplify -}
        simpl_mg <- liftIO $ do
          plugins <- readIORef (tcg_th_coreplugins tc_gblenv)
          hscSimplify hsc_env plugins ds_result

        {- Tidy -}
        (tidy_cg, mod_details) <- liftIO $ hscTidy hsc_env simpl_mg

        let !CgGuts{ cg_module    = this_mod,
                     cg_binds     = core_binds
                     } = tidy_cg

            !ModDetails { md_insts     = cls_insts
                        , md_fam_insts = fam_insts } = mod_details
                -- Get the *tidied* cls_insts and fam_insts

        {- Generate byte code & foreign stubs -}
        linkable <- liftIO $ generateFreshByteCode hsc_env
          (moduleName this_mod)
          (mkCgInteractiveGuts tidy_cg)
          iNTERACTIVELoc

        let src_span = SrcLoc -> SrcSpan
    srcLocSpan SrcLoc
    interactiveSrcLoc
        _ <- liftIO $ loadDecls interp hsc_env src_span linkable

        {- Load static pointer table entries -}
        liftIO $ hscAddSptEntries hsc_env (cg_spt_entries tidy_cg)

        let tcs = (TyCon -> Bool) -> [TyCon] -> [TyCon]
    forall a. (a -> Bool) -> [a] -> [a]
    filterOut TyCon -> Bool
    isImplicitTyCon (ModGuts -> [TyCon]
    mg_tcs ModGuts
    simpl_mg)
            patsyns = ModGuts -> [PatSyn]
    mg_patsyns ModGuts
    simpl_mg

            ext_ids = [ Id
    id | Id
    id <- CoreProgram -> [Id]
    forall b. [Bind b] -> [b]
    bindersOfBinds CoreProgram
    core_binds
                           , Name -> Bool
    isExternalName (Id -> Name
    idName Id
    id)
                           , Bool -> Bool
    not (Id -> Bool
    isDFunId Id
    id Bool -> Bool -> Bool
    || Id -> Bool
    isImplicitId Id
    id) ]
                -- We only need to keep around the external bindings
                -- (as decided by GHC.Iface.Tidy), since those are the only ones
                -- that might later be looked up by name.  But we can exclude
                --    - DFunIds, which are in 'cls_insts' (see Note [ic_tythings] in GHC.Runtime.Context
                --    - Implicit Ids, which are implicit in tcs
                -- c.f. GHC.Tc.Module.runTcInteractive, which reconstructs the TypeEnv

            new_tythings = (Id -> TyThing) -> [Id] -> [TyThing]
    forall a b. (a -> b) -> [a] -> [b]
    map Id -> TyThing
    AnId [Id]
    ext_ids [TyThing] -> [TyThing] -> [TyThing]
    forall a. [a] -> [a] -> [a]
    ++ (TyCon -> TyThing) -> [TyCon] -> [TyThing]
    forall a b. (a -> b) -> [a] -> [b]
    map TyCon -> TyThing
    ATyCon [TyCon]
    tcs [TyThing] -> [TyThing] -> [TyThing]
    forall a. [a] -> [a] -> [a]
    ++ (PatSyn -> TyThing) -> [PatSyn] -> [TyThing]
    forall a b. (a -> b) -> [a] -> [b]
    map (ConLike -> TyThing
    AConLike (ConLike -> TyThing) -> (PatSyn -> ConLike) -> PatSyn -> TyThing
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . PatSyn -> ConLike
    PatSynCon) [PatSyn]
    patsyns
            ictxt        = HscEnv -> InteractiveContext
    hsc_IC HscEnv
    hsc_env
            -- See Note [Fixity declarations in GHCi]
            fix_env      = TcGblEnv -> FixityEnv
    tcg_fix_env TcGblEnv
    tc_gblenv
            new_ictxt    = InteractiveContext
    -> [TyThing]
    -> InstEnv
    -> [FamInst]
    -> DefaultEnv
    -> FixityEnv
    -> InteractiveContext
    extendInteractiveContext InteractiveContext
    ictxt [TyThing]
    new_tythings InstEnv
    cls_insts
                                                    [FamInst]
    fam_insts DefaultEnv
    defaults FixityEnv
    fix_env
        return (new_tythings, new_ictxt)

    -- | Load the given static-pointer table entries into the interpreter.
    -- See Note [Grand plan for static forms] in "GHC.Iface.Tidy.StaticPtrTable".
    hscAddSptEntries :: HscEnv -> [SptEntry] -> IO ()
    hscAddSptEntries :: HscEnv -> [SptEntry] -> IO ()
    hscAddSptEntries HscEnv
    hsc_env [SptEntry]
    entries = do
        let interp :: Interp
    interp = HscEnv -> Interp
    hscInterp HscEnv
    hsc_env
        let add_spt_entry :: SptEntry -> IO ()
            add_spt_entry :: SptEntry -> IO ()
    add_spt_entry (SptEntry Id
    i Fingerprint
    fpr) = do
                -- These are only names from the current module
                (val, _, _) <- Interp
    -> HscEnv -> Name -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    loadName Interp
    interp HscEnv
    hsc_env (Id -> Name
    idName Id
    i)
                addSptEntry interp fpr val
        (SptEntry -> IO ()) -> [SptEntry] -> IO ()
    forall (t :: * -> *) (m :: * -> *) a b.
    (Foldable t, Monad m) =>
    (a -> m b) -> t a -> m ()
    mapM_ SptEntry -> IO ()
    add_spt_entry [SptEntry]
    entries

    {-
      Note [Fixity declarations in GHCi]
      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      To support fixity declarations on types defined within GHCi (as requested
      in #10018) we record the fixity environment in InteractiveContext.
      When we want to evaluate something GHC.Tc.Module.runTcInteractive pulls out this
      fixity environment and uses it to initialize the global typechecker environment.
      After the typechecker has finished its business, an updated fixity environment
      (reflecting whatever fixity declarations were present in the statements we
      passed it) will be returned from hscParsedStmt. This is passed to
      updateFixityEnv, which will stuff it back into InteractiveContext, to be
      used in evaluating the next statement.

    -}

    hscImport :: HscEnv -> String -> IO (ImportDecl GhcPs)
    hscImport :: HscEnv -> [Char] -> IO (ImportDecl GhcPs)
    hscImport HscEnv
    hsc_env [Char]
    str = HscEnv -> Hsc (ImportDecl GhcPs) -> IO (ImportDecl GhcPs)
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env (Hsc (ImportDecl GhcPs) -> IO (ImportDecl GhcPs))
    -> Hsc (ImportDecl GhcPs) -> IO (ImportDecl GhcPs)
    forall a b. (a -> b) -> a -> b
    $ do
        -- Use >>= \case instead of MonadFail desugaring to take into
        -- consideration `instance XXModule p = DataConCantHappen`.
        -- Tracked in #15681
        P (Located (HsModule GhcPs))
    -> [Char] -> Hsc (Located (HsModule GhcPs))
    forall thing.
    (Outputable thing, Data thing) =>
    P thing -> [Char] -> Hsc thing
    hscParseThing P (Located (HsModule GhcPs))
    parseModule [Char]
    str Hsc (Located (HsModule GhcPs))
    -> (Located (HsModule GhcPs) -> Hsc (ImportDecl GhcPs))
    -> Hsc (ImportDecl GhcPs)
    forall a b. Hsc a -> (a -> Hsc b) -> Hsc b
    forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
    >>= \case
          (L SrcSpan
    _ (HsModule{hsmodImports :: forall p. HsModule p -> [LImportDecl p]
    hsmodImports=[LImportDecl GhcPs]
    is})) ->
            case [LImportDecl GhcPs]
    is of
                [L SrcSpanAnnA
    _ ImportDecl GhcPs
    i] -> ImportDecl GhcPs -> Hsc (ImportDecl GhcPs)
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ImportDecl GhcPs
    i
                [LImportDecl GhcPs]
    _ -> IO (ImportDecl GhcPs) -> Hsc (ImportDecl GhcPs)
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO (ImportDecl GhcPs) -> Hsc (ImportDecl GhcPs))
    -> IO (ImportDecl GhcPs) -> Hsc (ImportDecl GhcPs)
    forall a b. (a -> b) -> a -> b
    $ MsgEnvelope GhcMessage -> IO (ImportDecl GhcPs)
    forall (io :: * -> *) a.
    MonadIO io =>
    MsgEnvelope GhcMessage -> io a
    throwOneError (MsgEnvelope GhcMessage -> IO (ImportDecl GhcPs))
    -> MsgEnvelope GhcMessage -> IO (ImportDecl GhcPs)
    forall a b. (a -> b) -> a -> b
    $
                         SrcSpan -> GhcMessage -> MsgEnvelope GhcMessage
    forall e. Diagnostic e => SrcSpan -> e -> MsgEnvelope e
    mkPlainErrorMsgEnvelope SrcSpan
    noSrcSpan (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $
                         PsWarning -> GhcMessage
    GhcPsMessage (PsWarning -> GhcMessage) -> PsWarning -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ UnknownDiagnosticFor PsWarning -> PsWarning
    PsUnknownMessage (UnknownDiagnosticFor PsWarning -> PsWarning)
    -> UnknownDiagnosticFor PsWarning -> PsWarning
    forall a b. (a -> b) -> a -> b
    $
                         DiagnosticMessage
    -> UnknownDiagnostic
         (DiagnosticOpts PsWarning) (DiagnosticHint DiagnosticMessage)
    forall a b.
    (Diagnostic a, Typeable a, DiagnosticOpts a ~ NoDiagnosticOpts) =>
    a -> UnknownDiagnostic b (DiagnosticHint a)
    mkSimpleUnknownDiagnostic (DiagnosticMessage
     -> UnknownDiagnostic
          (DiagnosticOpts PsWarning) (DiagnosticHint DiagnosticMessage))
    -> DiagnosticMessage
    -> UnknownDiagnostic
         (DiagnosticOpts PsWarning) (DiagnosticHint DiagnosticMessage)
    forall a b. (a -> b) -> a -> b
    $
                          [GhcHint] -> SDoc -> DiagnosticMessage
    mkPlainError [GhcHint]
    noHints (SDoc -> DiagnosticMessage) -> SDoc -> DiagnosticMessage
    forall a b. (a -> b) -> a -> b
    $
                             [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "parse error in import declaration"

    -- | Typecheck an expression (but don't run it)
    hscTcExpr :: HscEnv
              -> TcRnExprMode
              -> String -- ^ The expression
              -> IO Type
    hscTcExpr :: HscEnv -> TcRnExprMode -> [Char] -> IO Type
    hscTcExpr HscEnv
    hsc_env0 TcRnExprMode
    mode [Char]
    expr = HscEnv -> Hsc Type -> IO Type
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env0 (Hsc Type -> IO Type) -> Hsc Type -> IO Type
    forall a b. (a -> b) -> a -> b
    $ do
      hsc_env <- Hsc HscEnv
    getHscEnv
      parsed_expr <- hscParseExpr expr
      ioMsgMaybe $ hoistTcRnMessage $ tcRnExpr hsc_env mode parsed_expr

    -- | Find the kind of a type, after generalisation
    hscKcType
      :: HscEnv
      -> Bool            -- ^ Normalise the type
      -> String          -- ^ The type as a string
      -> IO (Type, Kind) -- ^ Resulting type (possibly normalised) and kind
    hscKcType :: HscEnv -> Bool -> [Char] -> IO (Type, Type)
    hscKcType HscEnv
    hsc_env0 Bool
    normalise [Char]
    str = HscEnv -> Hsc (Type, Type) -> IO (Type, Type)
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env0 (Hsc (Type, Type) -> IO (Type, Type))
    -> Hsc (Type, Type) -> IO (Type, Type)
    forall a b. (a -> b) -> a -> b
    $ do
        hsc_env <- Hsc HscEnv
    getHscEnv
        ty <- hscParseType str
        ioMsgMaybe $ hoistTcRnMessage $ tcRnType hsc_env DefaultFlexi normalise ty

    hscParseExpr :: String -> Hsc (LHsExpr GhcPs)
    hscParseExpr :: [Char] -> Hsc (LHsExpr GhcPs)
    hscParseExpr [Char]
    expr = do
      maybe_stmt <- [Char] -> Hsc (Maybe (GhciLStmt GhcPs))
    hscParseStmt [Char]
    expr
      case maybe_stmt of
        Just (L SrcSpanAnnA
    _ (BodyStmt XBodyStmt GhcPs GhcPs (GenLocated SrcSpanAnnA (HsExpr GhcPs))
    _ GenLocated SrcSpanAnnA (HsExpr GhcPs)
    expr SyntaxExpr GhcPs
    _ SyntaxExpr GhcPs
    _)) -> GenLocated SrcSpanAnnA (HsExpr GhcPs)
    -> Hsc (GenLocated SrcSpanAnnA (HsExpr GhcPs))
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return GenLocated SrcSpanAnnA (HsExpr GhcPs)
    expr
        Maybe
      (GenLocated
         SrcSpanAnnA
         (StmtLR GhcPs GhcPs (GenLocated SrcSpanAnnA (HsExpr GhcPs))))
    _ -> MsgEnvelope GhcMessage
    -> Hsc (GenLocated SrcSpanAnnA (HsExpr GhcPs))
    forall (io :: * -> *) a.
    MonadIO io =>
    MsgEnvelope GhcMessage -> io a
    throwOneError (MsgEnvelope GhcMessage
     -> Hsc (GenLocated SrcSpanAnnA (HsExpr GhcPs)))
    -> MsgEnvelope GhcMessage
    -> Hsc (GenLocated SrcSpanAnnA (HsExpr GhcPs))
    forall a b. (a -> b) -> a -> b
    $
               SrcSpan -> GhcMessage -> MsgEnvelope GhcMessage
    forall e. Diagnostic e => SrcSpan -> e -> MsgEnvelope e
    mkPlainErrorMsgEnvelope SrcSpan
    noSrcSpan (GhcMessage -> MsgEnvelope GhcMessage)
    -> GhcMessage -> MsgEnvelope GhcMessage
    forall a b. (a -> b) -> a -> b
    $
               PsWarning -> GhcMessage
    GhcPsMessage (PsWarning -> GhcMessage) -> PsWarning -> GhcMessage
    forall a b. (a -> b) -> a -> b
    $ UnknownDiagnosticFor PsWarning -> PsWarning
    PsUnknownMessage
                 (UnknownDiagnosticFor PsWarning -> PsWarning)
    -> UnknownDiagnosticFor PsWarning -> PsWarning
    forall a b. (a -> b) -> a -> b
    $ DiagnosticMessage
    -> UnknownDiagnostic
         (DiagnosticOpts PsWarning) (DiagnosticHint DiagnosticMessage)
    forall a b.
    (Diagnostic a, Typeable a, DiagnosticOpts a ~ NoDiagnosticOpts) =>
    a -> UnknownDiagnostic b (DiagnosticHint a)
    mkSimpleUnknownDiagnostic
                 (DiagnosticMessage
     -> UnknownDiagnostic
          (DiagnosticOpts PsWarning) (DiagnosticHint DiagnosticMessage))
    -> DiagnosticMessage
    -> UnknownDiagnostic
         (DiagnosticOpts PsWarning) (DiagnosticHint DiagnosticMessage)
    forall a b. (a -> b) -> a -> b
    $ [GhcHint] -> SDoc -> DiagnosticMessage
    mkPlainError [GhcHint]
    noHints (SDoc -> DiagnosticMessage) -> SDoc -> DiagnosticMessage
    forall a b. (a -> b) -> a -> b
    $
                 [Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    "not an expression:" SDoc -> SDoc -> SDoc
    forall doc. IsLine doc => doc -> doc -> doc
    <+> SDoc -> SDoc
    quotes ([Char] -> SDoc
    forall doc. IsLine doc => [Char] -> doc
    text [Char]
    expr)

    hscParseStmt :: String -> Hsc (Maybe (GhciLStmt GhcPs))
    hscParseStmt :: [Char] -> Hsc (Maybe (GhciLStmt GhcPs))
    hscParseStmt = P (Maybe
         (GenLocated
            SrcSpanAnnA
            (StmtLR GhcPs GhcPs (GenLocated SrcSpanAnnA (HsExpr GhcPs)))))
    -> [Char]
    -> Hsc
         (Maybe
            (GenLocated
               SrcSpanAnnA
               (StmtLR GhcPs GhcPs (GenLocated SrcSpanAnnA (HsExpr GhcPs)))))
    forall thing.
    (Outputable thing, Data thing) =>
    P thing -> [Char] -> Hsc thing
    hscParseThing P (Maybe
         (GenLocated
            SrcSpanAnnA
            (StmtLR GhcPs GhcPs (GenLocated SrcSpanAnnA (HsExpr GhcPs)))))
    parseStmt

    hscParseStmtWithLocation :: String -> Int -> String
                             -> Hsc (Maybe (GhciLStmt GhcPs))
    hscParseStmtWithLocation :: [Char] -> TypeIndex -> [Char] -> Hsc (Maybe (GhciLStmt GhcPs))
    hscParseStmtWithLocation [Char]
    source TypeIndex
    linenumber [Char]
    stmt =
        [Char]
    -> TypeIndex
    -> P (Maybe
            (GenLocated
               SrcSpanAnnA
               (StmtLR GhcPs GhcPs (GenLocated SrcSpanAnnA (HsExpr GhcPs)))))
    -> [Char]
    -> Hsc
         (Maybe
            (GenLocated
               SrcSpanAnnA
               (StmtLR GhcPs GhcPs (GenLocated SrcSpanAnnA (HsExpr GhcPs)))))
    forall thing.
    (Outputable thing, Data thing) =>
    [Char] -> TypeIndex -> P thing -> [Char] -> Hsc thing
    hscParseThingWithLocation [Char]
    source TypeIndex
    linenumber P (Maybe
         (GenLocated
            SrcSpanAnnA
            (StmtLR GhcPs GhcPs (GenLocated SrcSpanAnnA (HsExpr GhcPs)))))
    parseStmt [Char]
    stmt

    hscParseType :: String -> Hsc (LHsType GhcPs)
    hscParseType :: [Char] -> Hsc (LHsType GhcPs)
    hscParseType = P (GenLocated SrcSpanAnnA (HsType GhcPs))
    -> [Char] -> Hsc (GenLocated SrcSpanAnnA (HsType GhcPs))
    forall thing.
    (Outputable thing, Data thing) =>
    P thing -> [Char] -> Hsc thing
    hscParseThing P (GenLocated SrcSpanAnnA (HsType GhcPs))
    parseType

    hscParseIdentifier :: HscEnv -> String -> IO (LocatedN RdrName)
    hscParseIdentifier :: HscEnv -> [Char] -> IO (LocatedN RdrName)
    hscParseIdentifier HscEnv
    hsc_env [Char]
    str =
        HscEnv -> Hsc (LocatedN RdrName) -> IO (LocatedN RdrName)
    forall a. HscEnv -> Hsc a -> IO a
    runInteractiveHsc HscEnv
    hsc_env (Hsc (LocatedN RdrName) -> IO (LocatedN RdrName))
    -> Hsc (LocatedN RdrName) -> IO (LocatedN RdrName)
    forall a b. (a -> b) -> a -> b
    $ P (LocatedN RdrName) -> [Char] -> Hsc (LocatedN RdrName)
    forall thing.
    (Outputable thing, Data thing) =>
    P thing -> [Char] -> Hsc thing
    hscParseThing P (LocatedN RdrName)
    parseIdentifier [Char]
    str

    hscParseThing :: (Outputable thing, Data thing)
                  => Lexer.P thing -> String -> Hsc thing
    hscParseThing :: forall thing.
    (Outputable thing, Data thing) =>
    P thing -> [Char] -> Hsc thing
    hscParseThing = [Char] -> TypeIndex -> P thing -> [Char] -> Hsc thing
    forall thing.
    (Outputable thing, Data thing) =>
    [Char] -> TypeIndex -> P thing -> [Char] -> Hsc thing
    hscParseThingWithLocation [Char]
    "<interactive>" TypeIndex
    1

    hscParseThingWithLocation :: (Outputable thing, Data thing) => String -> Int
                              -> Lexer.P thing -> String -> Hsc thing
    hscParseThingWithLocation :: forall thing.
    (Outputable thing, Data thing) =>
    [Char] -> TypeIndex -> P thing -> [Char] -> Hsc thing
    hscParseThingWithLocation [Char]
    source TypeIndex
    linenumber P thing
    parser [Char]
    str = do
        dflags <- Hsc DynFlags
    forall (m :: * -> *). HasDynFlags m => m DynFlags
    getDynFlags
        logger <- getLogger
        withTiming logger
                   (text "Parser [source]")
                   (const ()) $ {-# SCC "Parser" #-} do

            let buf = [Char] -> StringBuffer
    stringToStringBuffer [Char]
    str
                loc = FastString -> TypeIndex -> TypeIndex -> RealSrcLoc
    mkRealSrcLoc ([Char] -> FastString
    fsLit [Char]
    source) TypeIndex
    linenumber TypeIndex
    1

            case unP parser (initParserState (initParserOpts dflags) buf loc) of
                PFailed PState
    pst ->
                    (Messages PsWarning, Messages PsWarning) -> Hsc thing
    forall a. (Messages PsWarning, Messages PsWarning) -> Hsc a
    handleWarningsThrowErrors (PState -> (Messages PsWarning, Messages PsWarning)
    getPsMessages PState
    pst)
                POk PState
    pst thing
    thing -> do
                    (Messages PsWarning, Messages PsWarning) -> Hsc ()
    logWarningsReportErrors (PState -> (Messages PsWarning, Messages PsWarning)
    getPsMessages PState
    pst)
                    IO () -> Hsc ()
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO () -> Hsc ()) -> IO () -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_dump_parsed [Char]
    "Parser"
                                DumpFormat
    FormatHaskell (thing -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr thing
    thing)
                    IO () -> Hsc ()
    forall a. IO a -> Hsc a
    forall (m :: * -> *) a. MonadIO m => IO a -> m a
    liftIO (IO () -> Hsc ()) -> IO () -> Hsc ()
    forall a b. (a -> b) -> a -> b
    $ Logger -> DumpFlag -> [Char] -> DumpFormat -> SDoc -> IO ()
    putDumpFileMaybe Logger
    logger DumpFlag
    Opt_D_dump_parsed_ast [Char]
    "Parser AST"
                                DumpFormat
    FormatHaskell (BlankSrcSpan -> BlankEpAnnotations -> thing -> SDoc
    forall a. Data a => BlankSrcSpan -> BlankEpAnnotations -> a -> SDoc
    showAstData BlankSrcSpan
    NoBlankSrcSpan BlankEpAnnotations
    NoBlankEpAnnotations thing
    thing)
                    thing -> Hsc thing
    forall a. a -> Hsc a
    forall (m :: * -> *) a. Monad m => a -> m a
    return thing
    thing

    hscTidy :: HscEnv -> ModGuts -> IO (CgGuts, ModDetails)
    hscTidy :: HscEnv -> ModGuts -> IO (CgGuts, ModDetails)
    hscTidy HscEnv
    hsc_env ModGuts
    guts = do
      let logger :: Logger
    logger   = HscEnv -> Logger
    hsc_logger HscEnv
    hsc_env
      let this_mod :: Module
    this_mod = ModGuts -> Module
    mg_module ModGuts
    guts

      opts <- HscEnv -> IO TidyOpts
    initTidyOpts HscEnv
    hsc_env
      (cgguts, details) <- withTiming logger
        (text "CoreTidy"<+>brackets (ppr this_mod))
        (const ())
        $! {-# SCC "CoreTidy" #-} tidyProgram opts guts

      -- post tidy pretty-printing and linting...
      let tidy_rules     = ModDetails -> [CoreRule]
    md_rules ModDetails
    details
      let all_tidy_binds = CgGuts -> CoreProgram
    cg_binds CgGuts
    cgguts
      let name_ppr_ctx   = PromotionTickContext -> UnitEnv -> GlobalRdrEnv -> NamePprCtx
    forall info.
    Outputable info =>
    PromotionTickContext -> UnitEnv -> GlobalRdrEnvX info -> NamePprCtx
    mkNamePprCtx PromotionTickContext
    ptc (HscEnv -> UnitEnv
    hsc_unit_env HscEnv
    hsc_env) (ModGuts -> GlobalRdrEnv
    mg_rdr_env ModGuts
    guts)
          ptc            = DynFlags -> PromotionTickContext
    initPromotionTickContext (HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env)

      endPassHscEnvIO hsc_env name_ppr_ctx CoreTidy all_tidy_binds tidy_rules

      -- If the endPass didn't print the rules, but ddump-rules is
      -- on, print now
      unless (logHasDumpFlag logger Opt_D_dump_simpl) $
        putDumpFileMaybe logger Opt_D_dump_rules
          "Tidy Core rules"
          FormatText
          (pprRulesForUser tidy_rules)

      -- Print one-line size info
      let cs = CoreProgram -> CoreStats
    coreBindsStats CoreProgram
    all_tidy_binds
      putDumpFileMaybe logger Opt_D_dump_core_stats "Core Stats"
        FormatText
        (text "Tidy size (terms,types,coercions)"
         <+> ppr (moduleName this_mod) <> colon
         <+> int (cs_tm cs)
         <+> int (cs_ty cs)
         <+> int (cs_co cs))

      pure (cgguts, details)

    {- **********************************************************************
    %*                                                                      *
            Desugar, simplify, convert to bytecode, and link an expression
    %*                                                                      *
    %********************************************************************* -}

    hscCompileCoreExpr :: HscEnv -> SrcSpan -> CoreExpr -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    hscCompileCoreExpr :: HscEnv
    -> SrcSpan
    -> CoreExpr
    -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    hscCompileCoreExpr HscEnv
    hsc_env SrcSpan
    loc CoreExpr
    expr =
      case Hooks
    -> Maybe
         (HscEnv
          -> SrcSpan
          -> CoreExpr
          -> IO (ForeignHValue, [Linkable], PkgsLoaded))
    hscCompileCoreExprHook (HscEnv -> Hooks
    hsc_hooks HscEnv
    hsc_env) of
          Maybe
      (HscEnv
       -> SrcSpan
       -> CoreExpr
       -> IO (ForeignHValue, [Linkable], PkgsLoaded))
    Nothing -> HscEnv
    -> SrcSpan
    -> CoreExpr
    -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    hscCompileCoreExpr' HscEnv
    hsc_env SrcSpan
    loc CoreExpr
    expr
          Just HscEnv
    -> SrcSpan
    -> CoreExpr
    -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    h  -> HscEnv
    -> SrcSpan
    -> CoreExpr
    -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    h                   HscEnv
    hsc_env SrcSpan
    loc CoreExpr
    expr

    hscCompileCoreExpr' :: HscEnv -> SrcSpan -> CoreExpr -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    hscCompileCoreExpr' :: HscEnv
    -> SrcSpan
    -> CoreExpr
    -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    hscCompileCoreExpr' HscEnv
    hsc_env SrcSpan
    srcspan CoreExpr
    ds_expr = do
      {- Simplify it -}
      -- Question: should we call SimpleOpt.simpleOptExpr here instead?
      -- It is, well, simpler, and does less inlining etc.
      let dflags :: DynFlags
    dflags = HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env
      let logger :: Logger
    logger = HscEnv -> Logger
    hsc_logger HscEnv
    hsc_env
      let ic :: InteractiveContext
    ic = HscEnv -> InteractiveContext
    hsc_IC HscEnv
    hsc_env
      let unit_env :: UnitEnv
    unit_env = HscEnv -> UnitEnv
    hsc_unit_env HscEnv
    hsc_env
      let simplify_expr_opts :: SimplifyExprOpts
    simplify_expr_opts = DynFlags -> InteractiveContext -> SimplifyExprOpts
    initSimplifyExprOpts DynFlags
    dflags InteractiveContext
    ic

      simpl_expr <- Logger
    -> ExternalUnitCache -> SimplifyExprOpts -> CoreExpr -> IO CoreExpr
    simplifyExpr Logger
    logger (UnitEnv -> ExternalUnitCache
    ue_eps UnitEnv
    unit_env) SimplifyExprOpts
    simplify_expr_opts CoreExpr
    ds_expr

      -- Create a unique temporary binding
      --
      -- The id has to be exported for the JS backend. This isn't required for the
      -- byte-code interpreter but it does no harm to always do it.
      u <- uniqFromTag 'I'
      let binding_name = Unique -> FastString -> Name
    mkSystemVarName Unique
    u ([Char] -> FastString
    fsLit ([Char]
    "BCO_toplevel"))
      let binding_id   = Name -> Type -> Id
    mkExportedVanillaId Name
    binding_name (HasDebugCallStack => CoreExpr -> Type
    CoreExpr -> Type
    exprType CoreExpr
    simpl_expr)

      {- Tidy it (temporary, until coreSat does cloning) -}
      let tidy_occ_env = [OccName] -> TidyOccEnv
    initTidyOccEnv [Id -> OccName
    forall name. HasOccName name => name -> OccName
    occName Id
    binding_id]
      let tidy_env     = TidyOccEnv -> TidyEnv
    mkEmptyTidyEnv TidyOccEnv
    tidy_occ_env
      let tidy_expr    = TidyEnv -> CoreExpr -> CoreExpr
    tidyExpr TidyEnv
    tidy_env CoreExpr
    simpl_expr

      {- Prepare for codegen -}
      cp_cfg <- initCorePrepConfig hsc_env
      prepd_expr <- corePrepExpr
       logger cp_cfg
       tidy_expr

      {- Lint if necessary -}
      lintInteractiveExpr (text "hscCompileCoreExpr") hsc_env prepd_expr
      let this_loc = OsPathModLocation
              { ml_hs_file_ospath :: Maybe OsPath
    ml_hs_file_ospath   = Maybe OsPath
    forall a. Maybe a
    Nothing,
                ml_hi_file_ospath :: OsPath
    ml_hi_file_ospath   = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hscCompileCoreExpr':ml_hi_file_ospath",
                ml_obj_file_ospath :: OsPath
    ml_obj_file_ospath  = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hscCompileCoreExpr':ml_obj_file_ospath",
                ml_dyn_obj_file_ospath :: OsPath
    ml_dyn_obj_file_ospath = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hscCompileCoreExpr': ml_obj_file_ospath",
                ml_dyn_hi_file_ospath :: OsPath
    ml_dyn_hi_file_ospath  = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hscCompileCoreExpr': ml_dyn_hi_file_ospath",
                ml_hie_file_ospath :: OsPath
    ml_hie_file_ospath  = [Char] -> OsPath
    forall a. HasCallStack => [Char] -> a
    panic [Char]
    "hscCompileCoreExpr':ml_hie_file_ospath" }

      -- Ensure module uniqueness by giving it a name like "GhciNNNN".
      -- This uniqueness is needed by the JS linker. Without it we break the 1-1
      -- relationship between modules and object files, i.e. we get different object
      -- files for the same module and the JS linker doesn't support this.
      --
      -- Note that we can't use icInteractiveModule because the ic_mod_index value
      -- isn't bumped between invocations of hscCompileCoreExpr, so uniqueness isn't
      -- guaranteed.
      --
      -- We reuse the unique we obtained for the binding, but any unique would do.
      let this_mod = [Char] -> Module
    mkInteractiveModule (Unique -> [Char]
    forall a. Show a => a -> [Char]
    show Unique
    u)
      let for_bytecode = Bool
    True

      (stg_binds_with_deps, _prov_map, _collected_ccs, _stg_cg_infos) <-
           myCoreToStg logger
                       dflags
                       (interactiveInScope (hsc_IC hsc_env))
                       for_bytecode
                       this_mod
                       this_loc
                       [NonRec binding_id prepd_expr]

      let (stg_binds, _stg_deps) = unzip stg_binds_with_deps

      let interp = HscEnv -> Interp
    hscInterp HscEnv
    hsc_env

      case interp of
        -- always generate JS code for the JS interpreter (no bytecode!)
        Interp (ExternalInterp (ExtJS JSInterp
    i)) Loader
    _ InterpSymbolCache
    _ ->
          HscEnv
    -> SrcSpan
    -> JSInterp
    -> Module
    -> [(CgStgTopBinding, IdSet)]
    -> Id
    -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    jsCodeGen HscEnv
    hsc_env SrcSpan
    srcspan JSInterp
    i Module
    this_mod [(CgStgTopBinding, IdSet)]
    stg_binds_with_deps Id
    binding_id

        Interp
    _ -> do
          {- Convert to BCOs -}
          bcos <- HscEnv
    -> Module
    -> [CgStgTopBinding]
    -> [TyCon]
    -> Maybe ModBreaks
    -> [SptEntry]
    -> IO CompiledByteCode
    byteCodeGen HscEnv
    hsc_env
                    Module
    this_mod
                    [CgStgTopBinding]
    stg_binds
                    []
                    Maybe ModBreaks
    forall a. Maybe a
    Nothing -- modbreaks
                    [] -- spt entries

          {- load it -}
          bco_time <- getCurrentTime
          (fv_hvs, mods_needed, units_needed) <- loadDecls interp hsc_env srcspan $
            Linkable bco_time this_mod $ NE.singleton $ BCOs bcos
          {- Get the HValue for the root -}
          return (expectJust $ lookup (idName binding_id) fv_hvs, mods_needed, units_needed)

    -- | Generate JS code for the given bindings and return the HValue for the given id
    jsCodeGen
      :: HscEnv
      -> SrcSpan
      -> JSInterp
      -> Module
      -> [(CgStgTopBinding,IdSet)]
      -> Id
      -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    jsCodeGen :: HscEnv
    -> SrcSpan
    -> JSInterp
    -> Module
    -> [(CgStgTopBinding, IdSet)]
    -> Id
    -> IO (ForeignHValue, [Linkable], PkgsLoaded)
    jsCodeGen HscEnv
    hsc_env SrcSpan
    srcspan JSInterp
    i Module
    this_mod [(CgStgTopBinding, IdSet)]
    stg_binds_with_deps Id
    binding_id = do
      let logger :: Logger
    logger           = HscEnv -> Logger
    hsc_logger HscEnv
    hsc_env
          tmpfs :: TmpFs
    tmpfs            = HscEnv -> TmpFs
    hsc_tmpfs HscEnv
    hsc_env
          dflags :: DynFlags
    dflags           = HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env
          interp :: Interp
    interp           = HscEnv -> Interp
    hscInterp HscEnv
    hsc_env
          tmp_dir :: TempDir
    tmp_dir          = DynFlags -> TempDir
    tmpDir DynFlags
    dflags
          unit_env :: UnitEnv
    unit_env         = HscEnv -> UnitEnv
    hsc_unit_env HscEnv
    hsc_env
          js_config :: StgToJSConfig
    js_config        = DynFlags -> StgToJSConfig
    initStgToJSConfig DynFlags
    dflags

      -- We need to load all the dependencies first.
      --
      -- We get all the imported names from the Stg bindings and load their modules.
      --
      -- (logic adapted from GHC.Linker.Loader.loadDecls for the JS linker)
      let
        ([CgStgTopBinding]
    stg_binds, [IdSet]
    stg_deps) = [(CgStgTopBinding, IdSet)] -> ([CgStgTopBinding], [IdSet])
    forall (f :: * -> *) a b. Functor f => f (a, b) -> (f a, f b)
    unzip [(CgStgTopBinding, IdSet)]
    stg_binds_with_deps
        imported_ids :: [Id]
    imported_ids   = IdSet -> [Id]
    forall elt. UniqSet elt -> [elt]
    nonDetEltsUniqSet ([IdSet] -> IdSet
    unionVarSets [IdSet]
    stg_deps)
        imported_names :: [Name]
    imported_names = (Id -> Name) -> [Id] -> [Name]
    forall a b. (a -> b) -> [a] -> [b]
    map Id -> Name
    idName [Id]
    imported_ids

        needed_mods :: [Module]
        needed_mods :: [Module]
    needed_mods = [ HasDebugCallStack => Name -> Module
    Name -> Module
    nameModule Name
    n | Name
    n <- [Name]
    imported_names,
                        Name -> Bool
    isExternalName Name
    n,       -- Names from other modules
                        Bool -> Bool
    not (Name -> Bool
    isWiredInName Name
    n)   -- Exclude wired-in names
                      ]                         -- (see note below)
        -- Exclude wired-in names because we may not have read
        -- their interface files, so getLinkDeps will fail
        -- All wired-in names are in the base package, which we link
        -- by default, so we can safely ignore them here.

      -- Initialise the linker (if it's not been done already)
      Interp -> HscEnv -> IO ()
    initLoaderState Interp
    interp HscEnv
    hsc_env

      -- Take lock for the actual work.
      (dep_linkables, dep_units) <- Interp
    -> (LoaderState -> IO (LoaderState, ([Linkable], PkgsLoaded)))
    -> IO ([Linkable], PkgsLoaded)
    forall a. Interp -> (LoaderState -> IO (LoaderState, a)) -> IO a
    modifyLoaderState Interp
    interp ((LoaderState -> IO (LoaderState, ([Linkable], PkgsLoaded)))
     -> IO ([Linkable], PkgsLoaded))
    -> (LoaderState -> IO (LoaderState, ([Linkable], PkgsLoaded)))
    -> IO ([Linkable], PkgsLoaded)
    forall a b. (a -> b) -> a -> b
    $ \LoaderState
    pls -> do
        let link_opts :: LinkDepsOpts
    link_opts = HscEnv -> LinkDepsOpts
    initLinkDepsOpts HscEnv
    hsc_env

        -- Find what packages and linkables are required
        deps <- LinkDepsOpts
    -> Interp -> LoaderState -> SrcSpan -> [Module] -> IO LinkDeps
    getLinkDeps LinkDepsOpts
    link_opts Interp
    interp LoaderState
    pls SrcSpan
    srcspan [Module]
    needed_mods
        -- We update the LinkerState even if the JS interpreter maintains its linker
        -- state independently to load new objects here.

        let objs = (Linkable -> Maybe Linkable) -> [Linkable] -> [Linkable]
    forall a b. (a -> Maybe b) -> [a] -> [b]
    mapMaybe Linkable -> Maybe Linkable
    linkableFilterNative (LinkDeps -> [Linkable]
    ldNeededLinkables LinkDeps
    deps)
            (objs_loaded', _new_objs) = rmDupLinkables (objs_loaded pls) objs

        -- FIXME: we should make the JS linker load new_objs here, instead of
        -- on-demand.

        -- FIXME: we don't report needed units because we would have to find a way
        -- to build a meaningful LoadedPkgInfo (see the mess in
        -- GHC.Linker.Loader.{loadPackage,loadPackages'}). Detecting what to load
        -- and actually loading (using the native interpreter) are intermingled, so
        -- we can't directly reuse this code.
        let pls' = LoaderState
    pls { objs_loaded = objs_loaded' }
        pure (pls', (ldAllLinkables deps, emptyUDFM {- ldNeededUnits deps -}) )

      let foreign_stubs    = ForeignStubs
    NoStubs
          spt_entries      = [SptEntry]
    forall a. Monoid a => a
    mempty
          cost_centre_info = ([CostCentre], [CostCentreStack])
    forall a. Monoid a => a
    mempty

      -- codegen into object file whose path is in out_obj
      out_obj <- newTempName logger tmpfs tmp_dir TFL_CurrentModule "o"
      stgToJS logger js_config stg_binds this_mod spt_entries foreign_stubs cost_centre_info out_obj

      let TxtI id_sym = makeIdentForId binding_id Nothing IdPlain this_mod
      -- link code containing binding "id_sym = expr", using id_sym as root
      withJSInterp i $ \ExtInterpInstance JSInterpExtra
    inst -> do
        let roots :: [ExportedFun]
    roots = Module -> [FastString] -> [ExportedFun]
    mkExportedModFuns Module
    this_mod [FastString
    id_sym]
        Logger
    -> TmpFs
    -> TempDir
    -> StgToJSConfig
    -> UnitEnv
    -> ExtInterpInstance JSInterpExtra
    -> [Char]
    -> [ExportedFun]
    -> IO ()
    jsLinkObject Logger
    logger TmpFs
    tmpfs TempDir
    tmp_dir StgToJSConfig
    js_config UnitEnv
    unit_env ExtInterpInstance JSInterpExtra
    inst [Char]
    out_obj [ExportedFun]
    roots

      -- look up "id_sym" closure and create a StablePtr (HValue) from it
      href <- lookupClosure interp (IFaststringSymbol id_sym) >>= \case
        Maybe HValueRef
    Nothing -> [Char] -> SDoc -> IO HValueRef
    forall a. HasCallStack => [Char] -> SDoc -> a
    pprPanic [Char]
    "Couldn't find just linked TH closure" (FastString -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr FastString
    id_sym)
        Just HValueRef
    r  -> HValueRef -> IO HValueRef
    forall a. a -> IO a
    forall (f :: * -> *) a. Applicative f => a -> f a
    pure HValueRef
    r

      binding_fref <- withJSInterp i $ \ExtInterpInstance JSInterpExtra
    inst ->
                        HValueRef -> IO () -> IO ForeignHValue
    forall a. RemoteRef a -> IO () -> IO (ForeignRef a)
    mkForeignRef HValueRef
    href (ExtInterpInstance JSInterpExtra -> HValueRef -> IO ()
    forall d a. ExtInterpInstance d -> RemoteRef a -> IO ()
    freeReallyRemoteRef ExtInterpInstance JSInterpExtra
    inst HValueRef
    href)

      return (castForeignRef binding_fref, dep_linkables, dep_units)

    {- **********************************************************************
    %*                                                                      *
            Statistics on reading interfaces
    %*                                                                      *
    %********************************************************************* -}

    dumpIfaceStats :: HscEnv -> IO ()
    dumpIfaceStats :: HscEnv -> IO ()
    dumpIfaceStats HscEnv
    hsc_env = do
      eps <- HscEnv -> IO ExternalPackageState
    hscEPS HscEnv
    hsc_env
      let
        logger = HscEnv -> Logger
    hsc_logger HscEnv
    hsc_env
        dump_rn_stats = Logger -> DumpFlag -> Bool
    logHasDumpFlag Logger
    logger DumpFlag
    Opt_D_dump_rn_stats
        dump_if_trace = Logger -> DumpFlag -> Bool
    logHasDumpFlag Logger
    logger DumpFlag
    Opt_D_dump_if_trace
      when (dump_if_trace || dump_rn_stats) $
        logDumpMsg logger "Interface statistics" (ifaceStats eps)

    writeInterfaceOnlyMode :: DynFlags -> Bool
    writeInterfaceOnlyMode :: DynFlags -> Bool
    writeInterfaceOnlyMode DynFlags
    dflags =
     GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_WriteInterface DynFlags
    dflags Bool -> Bool -> Bool
    &&
     Bool -> Bool
    not (Backend -> Bool
    backendGeneratesCode (DynFlags -> Backend
    backend DynFlags
    dflags))