Split GHC.Driver.Types

I was working on making DynFlags stateless (#17957), especially by
storing loaded plugins into HscEnv instead of DynFlags. It turned out to
be complicated because HscEnv is in GHC.Driver.Types but LoadedPlugin
isn't: it is in GHC.Driver.Plugins which depends on GHC.Driver.Types. I
didn't feel like introducing yet another hs-boot file to break the loop.

Additionally I remember that while we introduced the module hierarchy
(#13009) we talked about splitting GHC.Driver.Types because it contained
various unrelated types and functions, but we never executed. I didn't
feel like making GHC.Driver.Types bigger with more unrelated Plugins
related types, so finally I bit the bullet and split GHC.Driver.Types.

As a consequence this patch moves a lot of things. I've tried to put
them into appropriate modules but nothing is set in stone.

Several other things moved to avoid loops.

* Removed Binary instances from GHC.Utils.Binary for random compiler
  things
* Moved Typeable Binary instances into GHC.Utils.Binary.Typeable: they
  import a lot of things that users of GHC.Utils.Binary don't want to
  depend on.
* put everything related to Units/Modules under GHC.Unit:
  GHC.Unit.Finder, GHC.Unit.Module.{ModGuts,ModIface,Deps,etc.}
* Created several modules under GHC.Types: GHC.Types.Fixity, SourceText,
  etc.
* Split GHC.Utils.Error (into GHC.Types.Error)
* Finally removed GHC.Driver.Types

Note that this patch doesn't put loaded plugins into HscEnv. It's left
for another patch.

Bump haddock submodule

1 files changed, 29 insertions, 15 deletions

diff --git a/compiler/GHC/Iface/Tidy.hs b/compiler/GHC/Iface/Tidy.hs
index 82f1c18920..10d0eb1d04 100644
--- a/compiler/GHC/Iface/Tidy.hs
+++ b/compiler/GHC/Iface/Tidy.hs
@@ -17,10 +17,13 @@ module GHC.Iface.Tidy (
 
 import GHC.Prelude
 
-import GHC.Tc.Types
 import GHC.Driver.Session
 import GHC.Driver.Backend
 import GHC.Driver.Ppr
+import GHC.Driver.Env
+
+import GHC.Tc.Types
+
 import GHC.Core
 import GHC.Core.Unfold
 import GHC.Core.Unfold.Make
@@ -34,36 +37,47 @@ import GHC.Core.Rules
 import GHC.Core.PatSyn
 import GHC.Core.ConLike
 import GHC.Core.Opt.Arity   ( exprArity, exprBotStrictness_maybe )
+import GHC.Core.InstEnv
+import GHC.Core.Type     ( tidyTopType )
+import GHC.Core.DataCon
+import GHC.Core.TyCon
+import GHC.Core.Class
+
 import GHC.Iface.Tidy.StaticPtrTable
+import GHC.Iface.Env
+
+import GHC.Tc.Utils.Env
+import GHC.Tc.Utils.Monad
+
+import GHC.Utils.Outputable
+import GHC.Utils.Misc( filterOut )
+import GHC.Utils.Panic
+import qualified GHC.Utils.Error as Err
+
+import GHC.Types.ForeignStubs
 import GHC.Types.Var.Env
 import GHC.Types.Var.Set
 import GHC.Types.Var
 import GHC.Types.Id
 import GHC.Types.Id.Make ( mkDictSelRhs )
 import GHC.Types.Id.Info
-import GHC.Core.InstEnv
-import GHC.Core.Type     ( tidyTopType )
 import GHC.Types.Demand  ( appIsDeadEnd, isTopSig, isDeadEndSig )
 import GHC.Types.Cpr     ( mkCprSig, botCpr )
 import GHC.Types.Basic
 import GHC.Types.Name hiding (varName)
 import GHC.Types.Name.Set
 import GHC.Types.Name.Cache
+import GHC.Types.Name.Ppr
 import GHC.Types.Avail
-import GHC.Iface.Env
-import GHC.Tc.Utils.Env
-import GHC.Tc.Utils.Monad
-import GHC.Core.DataCon
-import GHC.Core.TyCon
-import GHC.Core.Class
+import GHC.Types.Unique.Supply
+import GHC.Types.TypeEnv
+
 import GHC.Unit.Module
-import GHC.Driver.Types
+import GHC.Unit.Module.ModGuts
+import GHC.Unit.Module.ModDetails
+import GHC.Unit.Module.Deps
+
 import GHC.Data.Maybe
-import GHC.Types.Unique.Supply
-import GHC.Utils.Outputable
-import GHC.Utils.Misc( filterOut )
-import GHC.Utils.Panic
-import qualified GHC.Utils.Error as Err
 
 import Control.Monad
 import Data.Function