diff options
Diffstat (limited to 'compiler/GHC/Core/Opt/OccurAnal.hs')
| -rw-r--r-- | compiler/GHC/Core/Opt/OccurAnal.hs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/GHC/Core/Opt/OccurAnal.hs b/compiler/GHC/Core/Opt/OccurAnal.hs index 6e0fa12543..a4218df867 100644 --- a/compiler/GHC/Core/Opt/OccurAnal.hs +++ b/compiler/GHC/Core/Opt/OccurAnal.hs @@ -1856,7 +1856,8 @@ occAnalLam env (Cast expr co) -- usage3: you might think this was not necessary, because of -- the markAllNonTail in adjustRhsUsage; but not so! For a -- join point, adjustRhsUsage doesn't do this; yet if there is - -- a cast, we must! + -- a cast, we must! Also: why markAllNonTail? See + -- GHC.Core.Lint: Note Note [Join points and casts] usage3 = markAllNonTail usage2 in WithUsageDetails usage3 (Cast expr' co) |