FIX #1641: don't add auto sccs to compiler-generated bindings

[ghc-hetmet.git] / compiler / deSugar / Desugar.lhs

diff --git a/compiler/deSugar/Desugar.lhs b/compiler/deSugar/Desugar.lhs
index f9e6212..6842e9d 100644 (file)
--- a/compiler/deSugar/Desugar.lhs
+++ b/compiler/deSugar/Desugar.lhs
@@ -8,8 +8,6 @@ The Desugarer: turning HsSyn into Core.
 \begin{code}
 module Desugar ( deSugar, deSugarExpr ) where
 
-#include "HsVersions.h"
-
 import DynFlags
 import StaticFlags
 import HscTypes
@@ -39,9 +37,10 @@ import Outputable
 import SrcLoc
 import Maybes
 import FastString
-import Pretty      ( Doc )
 import Coverage
+
 import Data.IORef
+import Data.Char
 \end{code}
 
 %************************************************************************
@@ -152,13 +151,15 @@ mkAutoScc mod exports
   | not opt_SccProfilingOn     -- No profiling
   = NoSccs             
   | opt_AutoSccsOnAllToplevs   -- Add auto-scc on all top-level things
-  = AddSccs mod (\_ -> True)
+  = AddSccs mod (\id -> not $ isDerivedOccName $ getOccName id)
+    -- See #1641.  This is pretty yucky, but I can't see a better way
+    -- to identify compiler-generated Ids, and at least this should
+    -- catch them all.
   | opt_AutoSccsOnExportedToplevs      -- Only on exported things
   = AddSccs mod (\id -> idName id `elemNameSet` exports)
   | otherwise
   = NoSccs
 
-
 deSugarExpr :: HscEnv
            -> Module -> GlobalRdrEnv -> TypeEnv 
            -> LHsExpr Id
@@ -232,7 +233,7 @@ addExportFlags target exports keep_alive prs rules
     is_exported | target == HscInterpreted = isExternalName
                | otherwise                = (`elemNameSet` exports)
 
-ppr_ds_rules :: [CoreRule] -> PprStyle -> Doc
+ppr_ds_rules :: [CoreRule] -> SDoc
 ppr_ds_rules [] = empty
 ppr_ds_rules rules
   = text "" $$ text "-------------- DESUGARED RULES -----------------" $$
@@ -274,6 +275,6 @@ dsRule (L loc (HsRule name act vars lhs _tv_lhs rhs _fv_rhs))
        ; return (Just rule)
        } } }
   where
-    msg = hang (ptext SLIT("RULE left-hand side too complicated to desugar; ignored"))
+    msg = hang (ptext (sLit "RULE left-hand side too complicated to desugar; ignored"))
             2 (ppr lhs)
 \end{code}