Tiny optimisation to mkInlineMe

diff --git a/compiler/coreSyn/CoreUtils.lhs b/compiler/coreSyn/CoreUtils.lhs
index 0708d7a..d92b6d1 100644 (file)
--- a/compiler/coreSyn/CoreUtils.lhs
+++ b/compiler/coreSyn/CoreUtils.lhs
@@ -200,8 +200,9 @@ But it hardly seems worth it, so I don't bother.
 -- | Wraps the given expression in an inlining hint unless the expression
 -- is trivial in some sense, so that doing so would usually hurt us
 mkInlineMe :: CoreExpr -> CoreExpr
-mkInlineMe (Var v) = Var v
-mkInlineMe e      = Note InlineMe e
+mkInlineMe e@(Var _)           = e
+mkInlineMe e@(Note InlineMe _) = e
+mkInlineMe e                  = Note InlineMe e
 \end{code}
 
 \begin{code}