[Git][ghc/ghc][wip/fendor/ifacetype-deduplication] 2 commits: Add some tests to check for size of interface files when serialising

Hannes Siebenhandl (@fendor) gitlab at gitlab.haskell.org
Wed Apr 17 07:26:29 UTC 2024



Hannes Siebenhandl pushed to branch wip/fendor/ifacetype-deduplication at Glasgow Haskell Compiler / GHC


Commits:
30ecc6d2 by Matthew Pickering at 2024-04-17T09:21:50+02:00
Add some tests to check for size of interface files when serialising
various types

- - - - -
481d625b by Fendor at 2024-04-17T09:21:50+02:00
Implement TrieMap for IfaceType

- - - - -


14 changed files:

- compiler/GHC/Core/Map/Expr.hs
- compiler/GHC/Data/TrieMap.hs
- compiler/GHC/Iface/Type.hs
- + compiler/GHC/Iface/Type/Map.hs
- compiler/GHC/Stg/CSE.hs
- compiler/ghc.cabal.in
- + testsuite/tests/iface/IfaceSharingIfaceType.hs
- + testsuite/tests/iface/IfaceSharingName.hs
- + testsuite/tests/iface/Lib.hs
- + testsuite/tests/iface/Makefile
- + testsuite/tests/iface/all.T
- + testsuite/tests/iface/if_faststring.hs
- + testsuite/tests/iface/if_ifacetype.hs
- + testsuite/tests/iface/if_name.hs


Changes:

=====================================
compiler/GHC/Core/Map/Expr.hs
=====================================
@@ -40,6 +40,7 @@ import GHC.Utils.Outputable
 import qualified Data.Map    as Map
 import GHC.Types.Name.Env
 import Control.Monad( (>=>) )
+import GHC.Types.Literal (Literal)
 
 {-
 This module implements TrieMaps over Core related data structures
@@ -128,6 +129,8 @@ instance TrieMap CoreMap where
 -- inside another 'TrieMap', this is the type you want.
 type CoreMapG = GenMap CoreMapX
 
+type LiteralMap = Map.Map Literal
+
 -- | @CoreMapX a@ is the base map from @DeBruijn CoreExpr@ to @a@, but without
 -- the 'GenMap' optimization.
 data CoreMapX a


=====================================
compiler/GHC/Data/TrieMap.hs
=====================================
@@ -13,8 +13,6 @@ module GHC.Data.TrieMap(
    MaybeMap,
    -- * Maps over 'List' values
    ListMap,
-   -- * Maps over 'Literal's
-   LiteralMap,
    -- * 'TrieMap' class
    TrieMap(..), insertTM, deleteTM, foldMapTM, isEmptyTM,
 
@@ -30,7 +28,6 @@ module GHC.Data.TrieMap(
 
 import GHC.Prelude
 
-import GHC.Types.Literal
 import GHC.Types.Unique.DFM
 import GHC.Types.Unique( Uniquable )
 
@@ -39,6 +36,8 @@ import qualified Data.IntMap as IntMap
 import GHC.Utils.Outputable
 import Control.Monad( (>=>) )
 import Data.Kind( Type )
+import Data.Functor.Compose
+import Data.Functor.Product
 
 import qualified Data.Semigroup as S
 
@@ -343,15 +342,87 @@ ftList :: TrieMap m => (a -> Bool) -> ListMap m a -> ListMap m a
 ftList f (LM { lm_nil = mnil, lm_cons = mcons })
   = LM { lm_nil = filterMaybe f mnil, lm_cons = fmap (filterTM f) mcons }
 
-{-
-************************************************************************
-*                                                                      *
-                   Basic maps
-*                                                                      *
-************************************************************************
--}
+{- Composition -}
+
+instance (TrieMap m, TrieMap n) => TrieMap (Compose m n) where
+  type Key (Compose m n) = (Key m, Key n)
+  emptyTM  = Compose emptyTM
+  lookupTM = lkCompose lookupTM lookupTM
+  {-# INLINE lookupTM #-}
+  alterTM  = xtCompose alterTM alterTM
+  {-# INLINE alterTM #-}
+  foldTM   = fdCompose
+  {-# INLINE foldTM #-}
+  filterTM = ftCompose
+  {-# INLINE filterTM #-}
+
+lkCompose :: Monad m => (t1 -> f (g a1) -> m a2) -> (t2 -> a2 -> m b) -> (t1, t2) -> Compose f g a1 -> m b
+lkCompose f g (a, b) (Compose m) = f a m >>= g b
+{-# INLINE lkCompose #-}
+
+xtCompose ::
+          (TrieMap m, TrieMap n)
+          => (forall a  . Key m -> XT a -> m a -> m a)
+          -> (forall a . Key n -> XT a -> n a -> n a)
+          -> Key (Compose m n)
+          -> XT a
+          -> Compose m n a
+          -> Compose m n a
+
+xtCompose f g (a, b) xt (Compose m) = Compose ((f a |>> g b xt) m)
+
+{-# INLINE xtCompose #-}
+
+fdCompose :: (TrieMap m1, TrieMap m2) => (a -> b -> b) -> Compose m1 m2 a -> b -> b
+fdCompose f (Compose m) = foldTM (foldTM f) m
+
+{-# INLINE fdCompose #-}
+
+
+ftCompose :: (TrieMap n, Functor m) => (a -> Bool) -> Compose m n a -> Compose m n a
+ftCompose f (Compose m) = Compose (fmap (filterTM f) m)
+
+{-# INLINE ftCompose #-}
+
+{- Product -}
+instance (TrieMap m, TrieMap n) => TrieMap (Product m n) where
+  type Key (Product m n) = Either (Key m) (Key n)
+  emptyTM  = Pair emptyTM emptyTM
+  lookupTM = lkProduct
+  {-# INLINE lookupTM #-}
+  alterTM  = xtProduct
+  {-# INLINE alterTM #-}
+  foldTM   = fdProduct
+  {-# INLINE foldTM #-}
+  filterTM = ftProduct
+  {-# INLINE filterTM #-}
+
+lkProduct :: (TrieMap m1, TrieMap m2) => Either (Key m1) (Key m2) -> Product m1 m2 b -> Maybe b
+lkProduct k (Pair am bm) =
+  case k of
+    Left a -> lookupTM a am
+    Right b -> lookupTM b bm
+
+{-# INLINE lkProduct #-}
+
+xtProduct :: (TrieMap f, TrieMap g) => Either (Key f) (Key g) -> XT a -> Product f g a -> Product f g a
+xtProduct k xt (Pair am bm) =
+  case k of
+    Left a -> Pair (alterTM a xt am) bm
+    Right b -> Pair am (alterTM b xt bm)
+
+{-# INLINE xtProduct #-}
+
+fdProduct :: (TrieMap f, TrieMap g) => (a -> c -> c) -> Product f g a -> c -> c
+fdProduct f (Pair am bm) = foldTM f am . foldTM f bm
+
+{-# INLINE fdProduct #-}
+
+ftProduct :: (TrieMap f, TrieMap g) => (a -> Bool) -> Product f g a -> Product f g a
+ftProduct f (Pair am bm) = Pair (filterTM f am) (filterTM f bm)
+
+{-# INLINE ftProduct #-}
 
-type LiteralMap  a = Map.Map Literal a
 
 {-
 ************************************************************************


=====================================
compiler/GHC/Iface/Type.hs
=====================================
@@ -113,6 +113,10 @@ newtype IfLclName = IfLclName
   { getIfLclName :: LexicalFastString
   } deriving (Eq, Ord, Show)
 
+instance Uniquable IfLclName where
+  getUnique = getUnique . ifLclNameFS
+
+
 ifLclNameFS :: IfLclName -> FastString
 ifLclNameFS = getLexicalFastString . getIfLclName
 


=====================================
compiler/GHC/Iface/Type/Map.hs
=====================================
@@ -0,0 +1,180 @@
+{-# LANGUAGE TypeFamilies #-}
+module GHC.Iface.Type.Map where
+
+import GHC.Prelude
+import GHC.Data.TrieMap
+import GHC.Iface.Type
+import qualified Data.Map as Map
+import Data.Functor.Compose
+import GHC.Types.Basic
+import Control.Monad ((>=>))
+import GHC.Types.Unique.DFM
+import Data.Functor.Product
+import GHC.Types.Var (VarBndr(..))
+
+
+newtype IfaceTypeMap a = IfaceTypeMap (IfaceTypeMapG a)
+
+instance Functor IfaceTypeMap where
+  fmap f (IfaceTypeMap m) = IfaceTypeMap (fmap f m)
+
+instance TrieMap IfaceTypeMap where
+  type Key IfaceTypeMap = IfaceType
+
+  emptyTM = IfaceTypeMap emptyTM
+
+  lookupTM k (IfaceTypeMap m) = lookupTM k m
+
+  alterTM k f (IfaceTypeMap m) = IfaceTypeMap (alterTM k f m)
+
+  filterTM f (IfaceTypeMap m) = IfaceTypeMap (filterTM f m)
+
+  foldTM f (IfaceTypeMap m) = foldTM f m
+
+type IfaceTypeMapG = GenMap IfaceTypeMapX
+
+data IfaceTypeMapX a
+  = IFM { ifm_lit :: IfaceLiteralMap a
+        , ifm_var :: UniqDFM IfLclName a
+        , ifm_app :: IfaceTypeMapG (IfaceAppArgsMap a)
+        , ifm_fun_ty :: FunTyFlagMap (IfaceTypeMapG (IfaceTypeMapG (IfaceTypeMapG a)))
+        , ifm_ty_con_app :: IfaceTyConMap (IfaceAppArgsMap a)
+        , ifm_forall_ty :: IfaceForAllBndrMap (IfaceTypeMapG a)
+        , ifm_cast_ty :: IfaceTypeMapG (IfaceCoercionMap a)
+        , ifm_coercion_ty :: IfaceCoercionMap a
+        , ifm_tuple_ty :: TupleSortMap (PromotionFlagMap (IfaceAppArgsMap a))  }
+
+type IfaceLiteralMap = Map.Map IfaceTyLit
+type FunTyFlagMap = Map.Map FunTyFlag
+type IfaceTyConMap = Map.Map IfaceTyCon
+type ForAllTyFlagMap = Map.Map ForAllTyFlag
+type IfaceCoercionMap = Map.Map IfaceCoercion
+type TupleSortMap = Map.Map TupleSort
+type PromotionFlagMap = Map.Map PromotionFlag
+type IfaceForAllBndrMap = Compose IfaceBndrMap ForAllTyFlagMap
+
+type IfaceIdBndrMap = Compose IfaceTypeMapG (Compose (UniqDFM IfLclName) IfaceTypeMapG)
+type IfaceTvBndrMap = Compose (UniqDFM IfLclName) IfaceTypeMapG
+
+type IfaceBndrMap = Product IfaceIdBndrMap IfaceTvBndrMap
+
+
+
+
+type IfaceAppArgsMap a = ListMap (Compose IfaceTypeMapG ForAllTyFlagMap) a
+
+emptyE :: IfaceTypeMapX a
+emptyE = IFM { ifm_lit = emptyTM
+             , ifm_var = emptyTM
+             , ifm_app = emptyTM
+             , ifm_fun_ty = emptyTM
+             , ifm_ty_con_app = emptyTM
+             , ifm_forall_ty = emptyTM
+             , ifm_cast_ty = emptyTM
+             , ifm_coercion_ty = emptyTM
+             , ifm_tuple_ty = emptyTM }
+
+instance Functor IfaceTypeMapX where
+  fmap f  IFM { ifm_lit = ilit
+          , ifm_var = ivar
+          , ifm_app = iapp
+          , ifm_fun_ty = ift
+          , ifm_ty_con_app = itc
+          , ifm_forall_ty = ifal
+          , ifm_cast_ty = icast
+          , ifm_coercion_ty = ico
+          , ifm_tuple_ty = itup }
+
+    = IFM { ifm_lit = fmap f ilit
+          , ifm_var = fmap f ivar
+          , ifm_app = fmap (fmap f) iapp
+          , ifm_fun_ty = fmap (fmap (fmap (fmap f))) ift
+          , ifm_ty_con_app = fmap (fmap f) itc
+          , ifm_forall_ty = fmap (fmap f) ifal
+          , ifm_cast_ty = fmap (fmap f) icast
+          , ifm_coercion_ty = fmap f ico
+          , ifm_tuple_ty = fmap (fmap (fmap f)) itup }
+
+instance TrieMap IfaceTypeMapX where
+  type Key IfaceTypeMapX = IfaceType
+
+  emptyTM = emptyE
+  lookupTM = lkE
+  alterTM = xtE
+  foldTM = fdE
+  filterTM = ftE
+  {-# INLINE lookupTM #-}
+  {-# INLINE alterTM #-}
+
+{-# INLINE ftE #-}
+ftE :: (a -> Bool) -> IfaceTypeMapX a -> IfaceTypeMapX a
+ftE f  IFM { ifm_lit = ilit
+          , ifm_var = ivar
+          , ifm_app = iapp
+          , ifm_fun_ty = ift
+          , ifm_ty_con_app = itc
+          , ifm_forall_ty = ifal
+          , ifm_cast_ty = icast
+          , ifm_coercion_ty = ico
+          , ifm_tuple_ty = itup }
+
+    = IFM { ifm_lit = filterTM f ilit
+          , ifm_var = filterTM f ivar
+          , ifm_app = fmap (filterTM f) iapp
+          , ifm_fun_ty = fmap (fmap (fmap (filterTM f))) ift
+          , ifm_ty_con_app = fmap (filterTM f) itc
+          , ifm_forall_ty = fmap (filterTM f) ifal
+          , ifm_cast_ty = fmap (filterTM f) icast
+          , ifm_coercion_ty = filterTM f ico
+          , ifm_tuple_ty = fmap (fmap (filterTM f)) itup }
+
+{-# INLINE fdE #-}
+fdE :: (a -> b -> b) -> IfaceTypeMapX a -> b -> b
+fdE f  IFM { ifm_lit = ilit
+          , ifm_var = ivar
+          , ifm_app = iapp
+          , ifm_fun_ty = ift
+          , ifm_ty_con_app = itc
+          , ifm_forall_ty = ifal
+          , ifm_cast_ty = icast
+          , ifm_coercion_ty = ico
+          , ifm_tuple_ty = itup }
+  = foldTM f ilit . foldTM f ivar . foldTM (foldTM f) iapp
+  . foldTM (foldTM (foldTM (foldTM f))) ift
+  . foldTM (foldTM f) itc
+  . foldTM (foldTM f) ifal
+  . foldTM (foldTM f) icast
+  . foldTM f ico
+  . foldTM (foldTM (foldTM f)) itup
+
+bndrToKey :: IfaceBndr -> Either (IfaceType, (IfLclName, IfaceType)) IfaceTvBndr
+bndrToKey (IfaceIdBndr (a,b,c)) = Left (a, (b,c))
+bndrToKey (IfaceTvBndr k) = Right k
+
+{-# INLINE lkE #-}
+lkE :: IfaceType -> IfaceTypeMapX a -> Maybe a
+lkE it ifm = go it ifm
+  where
+    go (IfaceFreeTyVar {}) = error "ftv"
+    go (IfaceTyVar var) = ifm_var >.> lookupTM var
+    go (IfaceLitTy l) = ifm_lit >.> lookupTM l
+    go (IfaceAppTy ift args) = ifm_app >.> lkG ift >=> lookupTM (appArgsIfaceTypesForAllTyFlags args)
+    go (IfaceFunTy ft t1 t2 t3) = ifm_fun_ty >.> lookupTM ft >=> lkG t1 >=> lkG t2 >=> lkG t3
+    go (IfaceForAllTy (Bndr a b) t) = ifm_forall_ty >.> lookupTM (bndrToKey a,b) >=> lkG t
+    go (IfaceTyConApp tc args) = ifm_ty_con_app >.> lookupTM tc >=> lookupTM (appArgsIfaceTypesForAllTyFlags args)
+    go (IfaceCastTy ty co) = ifm_cast_ty >.> lkG ty >=> lookupTM co
+    go (IfaceCoercionTy co) = ifm_coercion_ty >.> lookupTM co
+    go (IfaceTupleTy sort prom args) = ifm_tuple_ty >.> lookupTM sort >=> lookupTM prom >=> lookupTM (appArgsIfaceTypesForAllTyFlags args)
+
+{-# INLINE xtE #-}
+xtE :: IfaceType -> XT a -> IfaceTypeMapX a -> IfaceTypeMapX a
+xtE (IfaceFreeTyVar {}) _ _ = error "ftv"
+xtE (IfaceTyVar var) f m = m { ifm_var = ifm_var m |> alterTM var f }
+xtE (IfaceLitTy l) f m = m { ifm_lit = ifm_lit m |> alterTM l f }
+xtE (IfaceAppTy ift args) f m = m { ifm_app = ifm_app m |> xtG ift |>> alterTM (appArgsIfaceTypesForAllTyFlags args) f }
+xtE (IfaceFunTy ft t1 t2 t3) f m = m { ifm_fun_ty = ifm_fun_ty m |> alterTM ft |>> xtG t1 |>> xtG t2 |>> xtG t3 f }
+xtE (IfaceForAllTy (Bndr a b) t) f m = m { ifm_forall_ty = ifm_forall_ty m |> alterTM (bndrToKey a,b) |>> xtG t f }
+xtE (IfaceTyConApp tc args) f m = m { ifm_ty_con_app = ifm_ty_con_app m |> alterTM tc |>> alterTM (appArgsIfaceTypesForAllTyFlags args) f }
+xtE (IfaceCastTy ty co) f m = m { ifm_cast_ty = ifm_cast_ty m |> xtG ty |>> alterTM co f }
+xtE (IfaceCoercionTy co) f m = m { ifm_coercion_ty = ifm_coercion_ty m |> alterTM co f }
+xtE (IfaceTupleTy sort prom args) f m = m { ifm_tuple_ty = ifm_tuple_ty m |> alterTM sort |>> alterTM prom |>> alterTM (appArgsIfaceTypesForAllTyFlags args) f }


=====================================
compiler/GHC/Stg/CSE.hs
=====================================
@@ -109,6 +109,8 @@ import GHC.Core.Map.Expr
 import GHC.Data.TrieMap
 import GHC.Types.Name.Env
 import Control.Monad( (>=>) )
+import qualified Data.Map as Map
+import GHC.Types.Literal ( Literal )
 
 --------------
 -- The Trie --
@@ -122,6 +124,8 @@ data StgArgMap a = SAM
     , sam_lit :: LiteralMap a
     }
 
+type LiteralMap = Map.Map Literal
+
 -- TODO(22292): derive
 instance Functor StgArgMap where
     fmap f SAM { sam_var = varm, sam_lit = litm } = SAM


=====================================
compiler/ghc.cabal.in
=====================================
@@ -579,6 +579,7 @@ Library
         GHC.Iface.Tidy.StaticPtrTable
         GHC.IfaceToCore
         GHC.Iface.Type
+        GHC.Iface.Type.Map
         GHC.JS.Ident
         GHC.JS.Make
         GHC.JS.Optimizer


=====================================
testsuite/tests/iface/IfaceSharingIfaceType.hs
=====================================
@@ -0,0 +1,44 @@
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+module IfaceSharingIfaceType (types) where
+
+import GHC.Data.FastString
+import GHC.Builtin.Uniques
+import GHC.Builtin.Names
+import GHC.Builtin.Types
+import GHC.Types.Name
+import GHC.Types.SrcLoc
+import GHC.Iface.Type
+import GHC.CoreToIface
+import GHC.Core.TyCo.Rep
+import GHC
+
+[f1,f2,f3,f4,f5] = map mkVarOcc ["a", "b","c","d","e"]
+
+[u1,u2,u3,u4,u5] = map mkPreludeMiscIdUnique [10000..10004]
+
+names = [ mkExternalName u1 pRELUDE f1 noSrcSpan
+        , mkExternalName u2 pRELUDE f2 noSrcSpan
+        , mkExternalName u3 pRELUDE f3 noSrcSpan
+        , mkExternalName u4 pRELUDE f4 noSrcSpan
+        , mkExternalName u5 pRELUDE f5 noSrcSpan ]
+
+-- Int
+intIfaceTy = toIfaceType intTy
+
+wordIfaceTy = toIfaceType wordTy
+
+listIntTy = toIfaceType (mkListTy intTy)
+
+funTy = (intTy `mkVisFunTyMany` wordTy `mkVisFunTyMany` mkListTy intTy)
+
+funIfaceTy = toIfaceType funTy
+
+reallyBigFunTy = toIfaceType (funTy `mkVisFunTyMany` funTy `mkVisFunTyMany` funTy `mkVisFunTyMany` funTy)
+
+forallIfaceTy = toIfaceType (dataConType justDataCon)
+
+
+types = [intIfaceTy, wordIfaceTy, listIntTy, funIfaceTy, reallyBigFunTy, forallIfaceTy]
+


=====================================
testsuite/tests/iface/IfaceSharingName.hs
=====================================
@@ -0,0 +1,21 @@
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+module IfaceSharingName where
+
+import Lib
+import GHC.Data.FastString
+import GHC.Builtin.Uniques
+import GHC.Builtin.Names
+import GHC.Types.Name
+import GHC.Types.SrcLoc
+
+[f1,f2,f3,f4,f5] = map mkVarOcc ["a", "b","c","d","e"]
+
+[u1,u2,u3,u4,u5] = map mkPreludeMiscIdUnique [10000..10004]
+
+names = [ mkExternalName u1 pRELUDE f1 noSrcSpan
+        , mkExternalName u2 pRELUDE f2 noSrcSpan
+        , mkExternalName u3 pRELUDE f3 noSrcSpan
+        , mkExternalName u4 pRELUDE f4 noSrcSpan
+        , mkExternalName u5 pRELUDE f5 noSrcSpan ]


=====================================
testsuite/tests/iface/Lib.hs
=====================================
@@ -0,0 +1,15 @@
+module Lib where
+
+import GHC.Utils.Binary
+import GHC.Iface.Binary
+import qualified Data.ByteString as B
+import System.Environment
+import Data.Maybe
+
+testSize :: Binary a => CompressionIFace -> a -> IO Int
+testSize compLvl payload = do
+  args <- getArgs
+  bh <- openBinMem 1024
+  putWithUserData QuietBinIFace compLvl bh payload
+  withBinBuffer bh (\b -> return (B.length b))
+


=====================================
testsuite/tests/iface/Makefile
=====================================
@@ -0,0 +1,4 @@
+TOP=../..
+include $(TOP)/mk/boilerplate.mk
+include $(TOP)/mk/test.mk
+


=====================================
testsuite/tests/iface/all.T
=====================================
@@ -0,0 +1,24 @@
+test( 'if_faststring'
+    , [ stat_from_file('normal', 5, 'NORMALSIZE')
+      , stat_from_file('medium', 5, 'MEDIUMSIZE')
+      , stat_from_file('full', 5, 'FULLSIZE')
+      , extra_files(["Lib.hs"])]
+    , compile_and_run
+    , ['-package ghc'])
+
+test( 'if_name'
+    , [ stat_from_file('normal', 5, 'NORMALSIZE')
+      , stat_from_file('medium', 5, 'MEDIUMSIZE')
+      , stat_from_file('full', 5, 'FULLSIZE')
+      , extra_files(["Lib.hs", "IfaceSharingName.hs"])]
+    , compile_and_run
+    , ['-package ghc'])
+
+test( 'if_ifacetype'
+    , [ stat_from_file('normal', 5, 'NORMALSIZE')
+      , stat_from_file('medium', 5, 'MEDIUMSIZE')
+      , stat_from_file('full', 5, 'FULLSIZE')
+      , extra_files(["Lib.hs", "IfaceSharingIfaceType.hs"])]
+    , compile_and_run
+    , ['-package ghc'])
+


=====================================
testsuite/tests/iface/if_faststring.hs
=====================================
@@ -0,0 +1,15 @@
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+import Lib
+import GHC.Data.FastString
+import GHC.Iface.Binary
+
+main :: IO ()
+main = do
+  sz <- testSize MaximalCompression (concat (replicate 1000 ["abc", "cde", "efg" :: FastString]))
+  writeFile "FULLSIZE" (show sz)
+  sz <- testSize SafeExtraCompression (concat (replicate 1000 ["abc", "cde", "efg" :: FastString]))
+  writeFile "MEDIUMSIZE" (show sz)
+  sz <- testSize NormalCompression (concat (replicate 1000 ["abc", "cde", "efg" :: FastString]))
+  writeFile "NORMALSIZE" (show sz)


=====================================
testsuite/tests/iface/if_ifacetype.hs
=====================================
@@ -0,0 +1,13 @@
+import Lib
+import IfaceSharingIfaceType
+import GHC.Iface.Binary
+
+main :: IO ()
+main = do
+  sz <- testSize MaximalCompression (concat (replicate 500 types))
+  writeFile "FULLSIZE" (show sz)
+  sz <- testSize SafeExtraCompression (concat (replicate 500 types))
+  writeFile "MEDIUMSIZE" (show sz)
+  sz <- testSize NormalCompression (concat (replicate 500 types))
+  writeFile "NORMALSIZE" (show sz)
+


=====================================
testsuite/tests/iface/if_name.hs
=====================================
@@ -0,0 +1,12 @@
+import Lib
+import IfaceSharingName
+import GHC.Iface.Binary
+
+main :: IO ()
+main = do
+  sz <- testSize MaximalCompression (concat (replicate 1000 names))
+  writeFile "FULLSIZE" (show sz)
+  sz <- testSize SafeExtraCompression (concat (replicate 1000 names))
+  writeFile "MEDIUMSIZE" (show sz)
+  sz <- testSize NormalCompression (concat (replicate 1000 names))
+  writeFile "NORMALSIZE" (show sz)



View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/418133a9b6252d6501759a9d0d0de27b6786e183...481d625b1a5fa5cd1ba9d0f4487b4a128badfa20

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/418133a9b6252d6501759a9d0d0de27b6786e183...481d625b1a5fa5cd1ba9d0f4487b4a128badfa20
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