-- β-reduction
--------------------------------
beta, betatop :: Transform
--- Substitute arg for x in expr
-beta (App (Lam x expr) arg) = change $ 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
-- Get the normalized version
norm <- Trans.lift $ getNormalized f
if needsInline norm
- then
- change norm
+ then do
+ -- Regenerate all uniques in the to-be-inlined expression
+ norm_uniqued <- Trans.lift $ genUniques norm
+ change norm_uniqued
else
return expr
else