Fix typo.

[matthijs/master-project/cλash.git] / cλash / CLasH / Normalize.hs

diff --git a/cλash/CLasH/Normalize.hs b/cλash/CLasH/Normalize.hs
index 4ef112b605e762c16186f12951123a37574e060d..0d352761dbafec889da2345d1b82bc9dab0b4542 100644 (file)
--- a/cλash/CLasH/Normalize.hs
+++ b/cλash/CLasH/Normalize.hs
@@ -64,8 +64,10 @@ etatop = notappargs ("eta", eta)
 -- β-reduction
 --------------------------------
 beta, betatop :: Transform
--- Substitute arg for x in expr
-beta (App (Lam x expr) arg) = setChanged >> substitute x arg expr
+-- Substitute arg for x in expr. For value lambda's, also clone before
+-- substitution.
+beta (App (Lam x expr) arg) | CoreSyn.isTyVar x = setChanged >> substitute x arg expr
+                            | otherwise      = setChanged >> substitute_clone x arg expr
 -- Propagate the application into the let
 beta (App (Let binds expr) arg) = change $ Let binds (App expr arg)
 -- Propagate the application into each of the alternatives
@@ -322,7 +324,7 @@ inlinenonreptop = everywhere ("inlinenonrep", inlinebind ((Monad.liftM not) . is
 
 inlinetoplevel, inlinetopleveltop :: Transform
 -- Any system name is candidate for inlining. Never inline user-defined
--- functions, to preserver structure.
+-- functions, to preserve structure.
 inlinetoplevel expr@(Var f) | not $ isUserDefined f = do
   norm <- isNormalizeable f
   -- See if this is a top level binding for which we have a body