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{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE MagicHash #-}
{-# LANGUAGE UnboxedTuples #-}
import GHC.Exts
import GHC.Word (Word8(..), Word16(..), Word32(..))
-- We expect these ifs to be rewritten into core switches. Then they
-- will become C-- switches possibly after ifs again. Either way, C--
-- switches only supported native comparisons before, so this tests that
-- non-native ones work.
main :: IO ()
main = do
let W8# five = 5
switch8 five
let W16# five = 5
switch16 five
let W32# five = 5
switch32 five
{-# NOINLINE switch8 #-}
switch8 :: Word8# -> IO ()
switch8 n =
if isTrue# (n `eqWord8#` three)
then putStrLn "Word8 is 3"
else putStrLn "Word8 is not 3"
where
W8# three = 3
{-# NOINLINE switch16 #-}
switch16 :: Word16# -> IO ()
switch16 n =
if isTrue# (n `eqWord16#` three)
then putStrLn "Word16 is 3"
else putStrLn "Word16 is not 3"
where
W16# three = 3
{-# NOINLINE switch32 #-}
switch32 :: Word32# -> IO ()
switch32 n =
if isTrue# (n `eqWord32#` three)
then putStrLn "Word32 is 3"
else putStrLn "Word32 is not 3"
where
W32# three = 3
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