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-rw-r--r--compiler/cmm/CmmSpillReload.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/cmm/CmmSpillReload.hs b/compiler/cmm/CmmSpillReload.hs
index 0c53309657..707a571b3f 100644
--- a/compiler/cmm/CmmSpillReload.hs
+++ b/compiler/cmm/CmmSpillReload.hs
@@ -360,7 +360,7 @@ instance Outputable m => Outputable (ExtendWithSpills m) where
ppr (Reload regs) = ppr_regs "Reload" regs
ppr (NotSpillOrReload m) = ppr m
-instance DebugNodes M Last
+instance Outputable m => DebugNodes (ExtendWithSpills m) Last
ppr_regs :: String -> RegSet -> SDoc
ppr_regs s regs = text s <+> commafy (map ppr $ uniqSetToList regs)