From 96e38e64682e78e4f9a9e98408eff2dc52a1cfd8 Mon Sep 17 00:00:00 2001
From: Ben Gamari <ben@smart-cactus.org>
Date: Tue, 5 Nov 2019 15:58:17 -0500
Subject: FlagChecker: Add ticky flags to hashed flags

These affect output and therefore should be part of the flag hash.
---
 compiler/iface/FlagChecker.hs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/compiler/iface/FlagChecker.hs b/compiler/iface/FlagChecker.hs
index 34b55e9fef..92caee658b 100644
--- a/compiler/iface/FlagChecker.hs
+++ b/compiler/iface/FlagChecker.hs
@@ -57,7 +57,11 @@ fingerprintDynFlags dflags@DynFlags{..} this_mod nameio =
         -- -fprof-auto etc.
         prof = if gopt Opt_SccProfilingOn dflags then fromEnum profAuto else 0
 
-        flags = (mainis, safeHs, lang, cpp, paths, prof)
+        -- Ticky
+        ticky =
+          map (`gopt` dflags) [Opt_Ticky, Opt_Ticky_Allocd, Opt_Ticky_LNE, Opt_Ticky_Dyn_Thunk]
+
+        flags = (mainis, safeHs, lang, cpp, paths, prof, ticky)
 
     in -- pprTrace "flags" (ppr flags) $
        computeFingerprint nameio flags
-- 
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