Comments only

[ghc-hetmet.git] / compiler / basicTypes / IdInfo.lhs

diff --git a/compiler/basicTypes/IdInfo.lhs b/compiler/basicTypes/IdInfo.lhs
index 7eacbd8..3e64ee5 100644 (file)
--- a/compiler/basicTypes/IdInfo.lhs
+++ b/compiler/basicTypes/IdInfo.lhs
@@ -477,7 +477,7 @@ data SpecInfo
        VarSet          -- Locally-defined free vars of *both* LHS and RHS 
                        -- of rules.  I don't think it needs to include the
                        -- ru_fn though.
-                       -- Note [Rule dependency info]
+                       -- Note [Rule dependency info] in OccurAnal
 
 emptySpecInfo :: SpecInfo
 emptySpecInfo = SpecInfo [] emptyVarSet
@@ -500,16 +500,6 @@ setSpecInfoHead fn (SpecInfo rules fvs)
 seqSpecInfo (SpecInfo rules fvs) = seqRules rules `seq` seqVarSet fvs
 \end{code}
 
-Note [Rule dependency info]
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
-THe VarSet in a SpecInfo is used for dependency analysis in the 
-occurrence analyser.  We must track free vars in *both* lhs and rhs.  Why both?  
-Consider
-       x = y
-       RULE f x = 4
-Then if we substitute y for x, we'd better do so in the
- rule's LHS too, so we'd better ensure the dependency is respected
-
 
 
 %************************************************************************