Remember the AvailInfo for each IE

This is another take on https://phabricator.haskell.org/D3844.

This patch removes then need for haddock to reimplement the calculation
of exported names from modules. Instead when renaming export lists ghc
annotates each IE with its exported names.

Haddocks current  export logic has caused lots of trouble in the past
(on the Github issue tracker):
  - https://github.com/haskell/haddock/issues/121
  - https://github.com/haskell/haddock/issues/174
  - https://github.com/haskell/haddock/issues/225
  - https://github.com/haskell/haddock/issues/344
  - https://github.com/haskell/haddock/issues/584
  - https://github.com/haskell/haddock/issues/591
  - https://github.com/haskell/haddock/issues/597

Updates haddock submodule.

Reviewers: austin, bgamari, ezyang

Reviewed By: bgamari, ezyang

Subscribers: rwbarton, thomie

Differential Revision: https://phabricator.haskell.org/D3864

1 files changed, 2 insertions, 1 deletions

diff --git a/compiler/main/HscMain.hs b/compiler/main/HscMain.hs
index 44e33acad9..e99ca31fd4 100644
--- a/compiler/main/HscMain.hs
+++ b/compiler/main/HscMain.hs
@@ -97,6 +97,7 @@ import Panic
 import ConLike
 import Control.Concurrent
 
+import Avail            ( Avails )
 import Module
 import Packages
 import RdrName
@@ -383,7 +384,7 @@ hscParse' mod_summary
 -- can become a Nothing and decide whether this should instead throw an
 -- exception/signal an error.
 type RenamedStuff =
-        (Maybe (HsGroup GhcRn, [LImportDecl GhcRn], Maybe [LIE GhcRn],
+        (Maybe (HsGroup GhcRn, [LImportDecl GhcRn], Maybe [(LIE GhcRn, Avails)],
                 Maybe LHsDocString))
 
 -- | Rename and typecheck a module, additionally returning the renamed syntax