[project @ 2000-12-01 13:42:52 by simonpj]

[ghc-hetmet.git] / ghc / compiler / simplCore / CSE.lhs

diff --git a/ghc/compiler/simplCore/CSE.lhs b/ghc/compiler/simplCore/CSE.lhs
index c659230..69b35be 100644 (file)
--- a/ghc/compiler/simplCore/CSE.lhs
+++ b/ghc/compiler/simplCore/CSE.lhs
@@ -14,7 +14,7 @@ import CmdLineOpts    ( DynFlag(..), DynFlags, dopt )
 import Id              ( Id, idType )
 import CoreUtils       ( hashExpr, cheapEqExpr, exprIsBig, mkAltExpr )
 import DataCon         ( isUnboxedTupleCon )
-import Type            ( splitTyConApp_maybe )
+import Type            ( tyConAppArgs )
 import Subst           ( InScopeSet, uniqAway, emptyInScopeSet, 
                          extendInScopeSet, elemInScopeSet )
 import CoreSyn
@@ -170,9 +170,7 @@ cseAlts env scrut' bndr bndr' alts
                other ->  (bndr', extendCSEnv env bndr' scrut') -- See "yet another wrinkle"
                                                                -- map: scrut' -> bndr'
 
-    arg_tys = case splitTyConApp_maybe (idType bndr) of
-               Just (_, arg_tys) -> arg_tys
-               other             -> pprPanic "cseAlts" (ppr bndr)
+    arg_tys = tyConAppArgs (idType bndr)
 
     cse_alt (DataAlt con, args, rhs)
        | not (null args || isUnboxedTupleCon con)