Comments only

diff --git a/compiler/iface/IfaceSyn.lhs b/compiler/iface/IfaceSyn.lhs
index 99501a5..7957050 100644 (file)
--- a/compiler/iface/IfaceSyn.lhs
+++ b/compiler/iface/IfaceSyn.lhs
@@ -599,8 +599,9 @@ toIfaceIdInfo ext id_info
     unfold_info = unfoldingInfo id_info
     inline_prag = inlinePragInfo id_info
     rhs                = unfoldingTemplate unfold_info
-    unfold_hsinfo |  neverUnfold unfold_info 
-                 || has_worker = Nothing
+    unfold_hsinfo |  neverUnfold unfold_info   -- The CoreTidy phase retains unfolding info iff
+                 || has_worker = Nothing       -- we want to expose the unfolding, taking into account
+                                               -- unconditional NOINLINE, etc.  See TidyPgm.addExternal
                  | otherwise   = Just (HsUnfold inline_prag (toIfaceExpr ext rhs))
 
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