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-- MIT License, Copyright (c) 2024 Marvin Borner
-- Ultimately, the optimizer should not be outsourced but handled directly in Haskell.
-- For now, my BLoC format is used in combination with BLoCade the BLoC-aid.
module Optimizer
( optimizeToTarget
, optimizedReduce
) where
import Binary
import Control.Exception
import qualified Data.BitString as Bit
import qualified Data.ByteString.Lazy.Char8 as Byte
import Helper
import Reducer
import System.IO
import System.Process
tryIO :: IO a -> IO (Either IOException a)
tryIO = try
-- toBloc :: Expression -> IO (Failable Handle)
-- toBloc e = do
-- let binary = toBinary e
-- tryBloc <- tryIO $ createProcess (proc "bloc" ["-i", "-", "--from-blc"])
-- { std_in = CreatePipe
-- , std_out = CreatePipe
-- }
-- let bloc = case tryBloc of
-- Right (Just i, Just o, _, _) -> Just (i, o)
-- _ -> Nothing
-- case bloc of
-- Just (inH, outH) -> do
-- hPutStrLn inH binary
-- return $ Right outH
-- Nothing -> return $ Left $ OptimizerError "can't read/write to bloc"
toTarget :: Expression -> String -> IO (Failable String)
toTarget e target = do
res <- tryIO $ createProcess_
""
(shell $ "bloc -v -i - --from-blc | blocade -v -i - -t " <> target)
{ std_in = CreatePipe
, std_out = CreatePipe
}
case res of
Right (Just inH, Just outH, _, _) -> do
let binary = toBinary e
hSetBuffering inH NoBuffering
hSetBuffering outH NoBuffering
hSetBinaryMode outH True
hIsOpen inH >>= print
hIsWritable inH >>= print
hPutStrLn inH binary
hFlush inH
content <- hGetContents' outH
return $ case content of
"" -> Left $ OptimizerError "blocade returned empty string"
_ -> Right content
_ -> return $ Left $ OptimizerError "can't read from blocade"
-- TODO: add more targets (including other PL compilation)
toExpression :: String -> String -> Expression
toExpression "blc" = fromBinary
toExpression "unblc" = fromBinary
toExpression "bblc" =
fromBinary . fromBitString . Bit.bitStringLazy . Byte.pack
toExpression "unbblc" =
fromBinary . fromBitString . Bit.bitStringLazy . Byte.pack
toExpression _ = invalidProgramState
optimizeToTarget :: EvalConf -> Expression -> IO Expression
optimizeToTarget conf e = do
let target = _optimizeTarget conf
case target of
"" -> return e -- No target, fallback to unoptimized expression
_ -> do
maybeRes <- toTarget e target
case maybeRes of
Left err -> do
print err
return e -- Fallback to unoptimized expression
Right res -> return $ toExpression target res
optimizedReduce :: EvalConf -> Expression -> IO Expression
optimizedReduce conf e = optimizeToTarget conf e >>= reduce conf
|
