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 eeaa154..6842e9d 100644 (file)
--- a/compiler/deSugar/Desugar.lhs
+++ b/compiler/deSugar/Desugar.lhs
@@ -38,7 +38,9 @@ import SrcLoc
 import Maybes
 import FastString
 import Coverage
+
 import Data.IORef
+import Data.Char
 \end{code}
 
 %************************************************************************
@@ -149,13 +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