X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FbasicTypes%2FNameSet.lhs;h=e60ea23d278e0b33f565d7e72262aadf7dd36685;hb=08652e67c4d5d9a40687f93c286021a867c1bca0;hp=5c2c1b857b9c0576d6eebcf592fdc1869fca27f2;hpb=49c98d143c382a1341e1046f5ca00819a25691ba;p=ghc-hetmet.git

diff --git a/compiler/basicTypes/NameSet.lhs b/compiler/basicTypes/NameSet.lhs
index 5c2c1b8..e60ea23 100644
--- a/compiler/basicTypes/NameSet.lhs
+++ b/compiler/basicTypes/NameSet.lhs
@@ -97,6 +97,7 @@ mkFVs	 :: [Name] -> FreeVars
 delFV    :: Name -> FreeVars -> FreeVars
 delFVs   :: [Name] -> FreeVars -> FreeVars
 
+isEmptyFVs :: NameSet -> Bool
 isEmptyFVs  = isEmptyNameSet
 emptyFVs    = emptyNameSet
 plusFVs     = unionManyNameSets
@@ -147,14 +148,14 @@ plusDU = (++)
 duDefs :: DefUses -> Defs
 duDefs dus = foldr get emptyNameSet dus
   where
-    get (Nothing, u1) d2 = d2
-    get (Just d1, u1) d2 = d1 `unionNameSets` d2
+    get (Nothing, _u1) d2 = d2
+    get (Just d1, _u1) d2 = d1 `unionNameSets` d2
 
 duUses :: DefUses -> Uses
 -- Just like allUses, but defs are not eliminated
 duUses dus = foldr get emptyNameSet dus
   where
-    get (d1, u1) u2 = u1 `unionNameSets` u2
+    get (_d1, u1) u2 = u1 `unionNameSets` u2
 
 allUses :: DefUses -> Uses
 -- Collect all uses, regardless of