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module T7702Plugin ( plugin ) where
import GhcPlugins
-- A plugin that does nothing but tickle CoreM's writer.
plugin :: Plugin
plugin = defaultPlugin { installCoreToDos = install }
where
install :: [CommandLineOption] -> [CoreToDo] -> CoreM [CoreToDo]
install _ todos = do
putMsgS "T7702Plugin"
-- 1 million times, so the allocation in this plugin dominates allocation due
-- to other compiler flags and the test framework can easily catch the difference
-- can't use replicateM_ because it causes its own problems
nothingX100000 ; nothingX100000 ; nothingX100000 ; nothingX100000 ; nothingX100000
nothingX100000 ; nothingX100000 ; nothingX100000 ; nothingX100000 ; nothingX100000
return todos
-- this will result in a call to plusWriter in CoreM's
-- >>= implementation, which was causing the space leak
nothing :: CoreM ()
nothing = liftIO (return ())
nothingX10 :: CoreM ()
nothingX10 = do
nothing ; nothing ; nothing ; nothing ; nothing
nothing ; nothing ; nothing ; nothing ; nothing
nothingX100 :: CoreM ()
nothingX100 = do
nothingX10 ; nothingX10 ; nothingX10 ; nothingX10 ; nothingX10
nothingX10 ; nothingX10 ; nothingX10 ; nothingX10 ; nothingX10
nothingX1000 :: CoreM ()
nothingX1000 = do
nothingX100 ; nothingX100 ; nothingX100 ; nothingX100 ; nothingX100
nothingX100 ; nothingX100 ; nothingX100 ; nothingX100 ; nothingX100
nothingX10000 :: CoreM ()
nothingX10000 = do
nothingX1000 ; nothingX1000 ; nothingX1000 ; nothingX1000 ; nothingX1000
nothingX1000 ; nothingX1000 ; nothingX1000 ; nothingX1000 ; nothingX1000
nothingX100000 :: CoreM ()
nothingX100000 = do
nothingX10000 ; nothingX10000 ; nothingX10000 ; nothingX10000 ; nothingX10000
nothingX10000 ; nothingX10000 ; nothingX10000 ; nothingX10000 ; nothingX10000
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