CLabel cleanup:

Remove these smart constructors for these reasons:
* mkLocalClosureTableLabel : Does the same as the non-local variant.
* mkLocalClosureLabel      : Does the same as the non-local variant.
* mkLocalInfoTableLabel    : Decide if we make a local label based on the name
                             and just use mkInfoTableLabel everywhere.

5 files changed, 11 insertions, 28 deletions

diff --git a/compiler/GHC/Cmm/CLabel.hs b/compiler/GHC/Cmm/CLabel.hs
index dd7e1f14f5..933151a679 100644
--- a/compiler/GHC/Cmm/CLabel.hs
+++ b/compiler/GHC/Cmm/CLabel.hs
@@ -33,9 +33,6 @@ module GHC.Cmm.CLabel (
         mkBytesLabel,
 
         mkLocalBlockLabel,
-        mkLocalClosureLabel,
-        mkLocalInfoTableLabel,
-        mkLocalClosureTableLabel,
 
         mkBlockInfoTableLabel,
 
@@ -587,14 +584,6 @@ mkRednCountsLabel name = IdLabel name NoCafRefs (IdTickyInfo TickyRednCounts)
 mkTagHitLabel :: Name -> Unique -> CLabel
 mkTagHitLabel name !uniq = IdLabel name NoCafRefs (IdTickyInfo (TickyInferedTag uniq))
 
--- These have local & (possibly) external variants:
-mkLocalClosureLabel      :: Name -> CafInfo -> CLabel
-mkLocalInfoTableLabel    :: Name -> CafInfo -> CLabel
-mkLocalClosureTableLabel :: Name -> CafInfo -> CLabel
-mkLocalClosureLabel   !name !c  = IdLabel name  c Closure
-mkLocalInfoTableLabel   name c  = IdLabel name  c LocalInfoTable
-mkLocalClosureTableLabel name c = IdLabel name  c ClosureTable
-
 mkClosureLabel              :: Name -> CafInfo -> CLabel
 mkInfoTableLabel            :: Name -> CafInfo -> CLabel
 mkEntryLabel                :: Name -> CafInfo -> CLabel
@@ -602,7 +591,10 @@ mkClosureTableLabel         :: Name -> CafInfo -> CLabel
 mkConInfoTableLabel         :: Name -> ConInfoTableLocation -> CLabel
 mkBytesLabel                :: Name -> CLabel
 mkClosureLabel name         c     = IdLabel name c Closure
-mkInfoTableLabel name       c     = IdLabel name c InfoTable
+-- | Decicdes between external and local labels based on the names externality.
+mkInfoTableLabel name       c
+  | isExternalName name = IdLabel name c InfoTable
+  | otherwise           = IdLabel name c LocalInfoTable
 mkEntryLabel name           c     = IdLabel name c Entry
 mkClosureTableLabel name    c     = IdLabel name c ClosureTable
 -- Special case for the normal 'DefinitionSite' case so that the 'ConInfoTable' application can be floated to a CAF.
diff --git a/compiler/GHC/Cmm/Info/Build.hs b/compiler/GHC/Cmm/Info/Build.hs
index 571a1faae7..4087225146 100644
--- a/compiler/GHC/Cmm/Info/Build.hs
+++ b/compiler/GHC/Cmm/Info/Build.hs
@@ -757,7 +757,7 @@ getStaticFuns decls =
   , Just (id, _) <- [cit_clo info]
   , let rep = cit_rep info
   , isStaticRep rep && isFunRep rep
-  , let !lbl = mkLocalClosureLabel (idName id) (idCafInfo id)
+  , let !lbl = mkClosureLabel (idName id) (idCafInfo id)
   ]
 
 
@@ -1219,7 +1219,7 @@ updInfoSRTs profile srt_env funSRTEnv caffy (CmmProc top_info top_l live g)
              HeapRep sta ptrs nptrs ty ->
                HeapRep sta (ptrs + length srtEntries) nptrs ty
              _other -> panic "maybeStaticFun"
-          lbl = mkLocalClosureLabel (idName id) caf_info
+          lbl = mkClosureLabel (idName id) caf_info
         in
           Just (newInfo, mkDataLits (Section Data lbl) lbl fields)
       | otherwise = Nothing
diff --git a/compiler/GHC/StgToCmm.hs b/compiler/GHC/StgToCmm.hs
index eea77198aa..3075182af6 100644
--- a/compiler/GHC/StgToCmm.hs
+++ b/compiler/GHC/StgToCmm.hs
@@ -235,8 +235,8 @@ mkModuleInit cost_centre_info this_mod hpc_info
 cgEnumerationTyCon :: TyCon -> FCode ()
 cgEnumerationTyCon tycon
   = do platform <- getPlatform
-       emitRODataLits (mkLocalClosureTableLabel (tyConName tycon) NoCafRefs)
-             [ CmmLabelOff (mkLocalClosureLabel (dataConName con) NoCafRefs)
+       emitRODataLits (mkClosureTableLabel (tyConName tycon) NoCafRefs)
+             [ CmmLabelOff (mkClosureLabel (dataConName con) NoCafRefs)
                            (tagForCon platform con)
              | con <- tyConDataCons tycon]
 
diff --git a/compiler/GHC/StgToCmm/Bind.hs b/compiler/GHC/StgToCmm/Bind.hs
index 25d04b323c..17d8556b15 100644
--- a/compiler/GHC/StgToCmm/Bind.hs
+++ b/compiler/GHC/StgToCmm/Bind.hs
@@ -81,7 +81,7 @@ cgTopRhsClosure :: Platform
                 -> (CgIdInfo, FCode ())
 
 cgTopRhsClosure platform rec id ccs upd_flag args body =
-  let closure_label = mkLocalClosureLabel (idName id) (idCafInfo id)
+  let closure_label = mkClosureLabel (idName id) (idCafInfo id)
       cg_id_info    = litIdInfo platform id lf_info (CmmLabel closure_label)
       lf_info       = mkClosureLFInfo platform id TopLevel [] upd_flag args
   in (cg_id_info, gen_code lf_info closure_label)
diff --git a/compiler/GHC/StgToCmm/Closure.hs b/compiler/GHC/StgToCmm/Closure.hs
index 0d048a6be8..2609606292 100644
--- a/compiler/GHC/StgToCmm/Closure.hs
+++ b/compiler/GHC/StgToCmm/Closure.hs
@@ -848,23 +848,14 @@ mkClosureInfoTableLabel platform id lf_info
         LFThunk _ _ upd_flag (ApThunk arity) _
                       -> mkApInfoTableLabel platform upd_flag arity
 
-        LFThunk{}     -> std_mk_lbl name cafs
-        LFReEntrant{} -> std_mk_lbl name cafs
+        LFThunk{}     -> mkInfoTableLabel name cafs
+        LFReEntrant{} -> mkInfoTableLabel name cafs
         _other        -> panic "closureInfoTableLabel"
 
   where
     name = idName id
 
-    std_mk_lbl | is_local  = mkLocalInfoTableLabel
-               | otherwise = mkInfoTableLabel
-
     cafs     = idCafInfo id
-    is_local = isDataConWorkId id
-       -- Make the _info pointer for the implicit datacon worker
-       -- binding local. The reason we can do this is that importing
-       -- code always either uses the _closure or _con_info. By the
-       -- invariants in "GHC.CoreToStg.Prep" anything else gets eta expanded.
-
 
 -- | thunkEntryLabel is a local help function, not exported.  It's used from
 -- getCallMethod.