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Reset the demand info on bindings going to top level (since they cannot be strict)
[ghc-hetmet.git]
/
compiler
/
simplCore
/
SetLevels.lhs
diff --git
a/compiler/simplCore/SetLevels.lhs
b/compiler/simplCore/SetLevels.lhs
index
5dbaec6
..
6dfb5f1
100644
(file)
--- a/
compiler/simplCore/SetLevels.lhs
+++ b/
compiler/simplCore/SetLevels.lhs
@@
-842,9
+842,11
@@
cloneRecVars NotTopLevel env@(_,_,subst,_) vs ctxt_lvl dest_lvl
returnUs (env', vs2)
-- VERY IMPORTANT: we must zap the demand info
returnUs (env', vs2)
-- VERY IMPORTANT: we must zap the demand info
- -- if the thing is going to float out past a lambda
+ -- if the thing is going to float out past a lambda,
+ -- or if it's going to top level (where things can't be strict)
zap_demand dest_lvl ctxt_lvl id
zap_demand dest_lvl ctxt_lvl id
- | ctxt_lvl == dest_lvl = id -- Stays put
- | otherwise = zapDemandIdInfo id -- Floats out
+ | ctxt_lvl == dest_lvl,
+ not (isTopLvl dest_lvl) = id -- Stays, and not going to top level
+ | otherwise = zapDemandIdInfo id -- Floats out
\end{code}
\end{code}