Fix Trac #2486: restore the specialiser to a working state

[ghc-hetmet.git] / compiler / specialise / SpecConstr.lhs

diff --git a/compiler/specialise/SpecConstr.lhs b/compiler/specialise/SpecConstr.lhs
index b4fd460..055f794 100644 (file)
--- a/compiler/specialise/SpecConstr.lhs
+++ b/compiler/specialise/SpecConstr.lhs
@@ -498,9 +498,9 @@ data ScEnv = SCE { sc_size  :: Maybe Int,   -- Size threshold
 
 ---------------------
 -- As we go, we apply a substitution (sc_subst) to the current term
-type InExpr = CoreExpr         -- *Before* applying the subst
+type InExpr = CoreExpr         -- _Before_ applying the subst
 
-type OutExpr = CoreExpr                -- *After* applying the subst
+type OutExpr = CoreExpr                -- _After_ applying the subst
 type OutId   = Id
 type OutVar  = Var
 
@@ -509,7 +509,7 @@ type HowBoundEnv = VarEnv HowBound  -- Domain is OutVars
 
 ---------------------
 type ValueEnv = IdEnv Value            -- Domain is OutIds
-data Value    = ConVal AltCon [CoreArg]        -- *Saturated* constructors
+data Value    = ConVal AltCon [CoreArg]        -- _Saturated_ constructors
              | LambdaVal               -- Inlinable lambdas or PAPs
 
 instance Outputable Value where
@@ -707,7 +707,7 @@ combineOccs :: [ArgOcc] -> [ArgOcc] -> [ArgOcc]
 combineOccs xs ys = zipWithEqual "combineOccs" combineOcc xs ys
 
 setScrutOcc :: ScEnv -> ScUsage -> OutExpr -> ArgOcc -> ScUsage
--- *Overwrite* the occurrence info for the scrutinee, if the scrutinee 
+-- _Overwrite_ the occurrence info for the scrutinee, if the scrutinee
 -- is a variable, and an interesting variable
 setScrutOcc env usg (Cast e _) occ = setScrutOcc env usg e occ
 setScrutOcc env usg (Note _ e) occ = setScrutOcc env usg e occ
@@ -796,7 +796,7 @@ scExpr' env (Case scrut b ty alts)
           ; let (usg', arg_occs) = lookupOccs usg bs'
                 scrut_occ = case con of
                                DataAlt dc -> ScrutOcc (unitUFM dc arg_occs)
-                               _ofther    -> ScrutOcc emptyUFM
+                               _          -> ScrutOcc emptyUFM
           ; return (usg', scrut_occ, (con,bs',rhs')) }
 
 scExpr' env (Let (NonRec bndr rhs) body)
@@ -1028,9 +1028,9 @@ specialise env bind_calls (fn, arg_bndrs, body, arg_occs)
                                ptext (sLit "Specialisations:") <+> ppr (pats ++ [p | OS p _ _ _ <- specs])])
                         return (nullUsage, spec_info)
 
-           _normal_case -> do
-                               
-       { (spec_usgs, new_specs) <- mapAndUnzipM (spec_one env fn arg_bndrs body)
+           _normal_case -> do {
+
+         (spec_usgs, new_specs) <- mapAndUnzipM (spec_one env fn arg_bndrs body)
                                                 (pats `zip` [spec_count..])
 
        ; let spec_usg = combineUsages spec_usgs