From 730bb59086ad1036143983c3fba61bd851bebc03 Mon Sep 17 00:00:00 2001
From: Ben Gamari <ben@well-typed.com>
Date: Wed, 21 Oct 2020 16:15:16 -0400
Subject: [PATCH] cmm: Add Note reference to ForeignHint

---
 compiler/GHC/Cmm/Type.hs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/compiler/GHC/Cmm/Type.hs b/compiler/GHC/Cmm/Type.hs
index 8a750cd10d..8cd502f8b7 100644
--- a/compiler/GHC/Cmm/Type.hs
+++ b/compiler/GHC/Cmm/Type.hs
@@ -311,6 +311,8 @@ isVecType _                       = False
 -- Hints are extra type information we attach to the arguments and
 -- results of a foreign call, where more type information is sometimes
 -- needed by the ABI to make the correct kind of call.
+--
+-- See Note [Signed vs unsigned] for one case where this is used.
 
 data ForeignHint
   = NoHint | AddrHint | SignedHint
-- 
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