import Data.String
import qualified Data.Map as Map
import qualified Data.Text.Lazy.IO as Text
+import LLVM.AST.AddrSpace
import LLVM.AST.Constant
import LLVM.AST.Float
import LLVM.AST.FloatingPointPredicate hiding (False, True)
import LLVM.IRBuilder
import LLVM.Pretty
import System.IO
+import System.IO.Error
import Text.Read (readMaybe)
-main = buildModuleT "main" repl
+main :: IO ()
+main = buildModuleT "main" repl >>= Text.hPutStrLn stderr . ("\n" <>) . ppll
repl :: ModuleBuilderT IO ()
repl = do
liftIO $ hPutStr stderr "ready> "
- ast <- liftIO $ readMaybe <$> getLine
- case ast of
+ mline <- liftIO $ catchIOError (Just <$> getLine) eofHandler
+ case mline of
+ Nothing -> return ()
+ Just l -> do
+ case readMaybe l of
Nothing -> liftIO $ hPutStrLn stderr "Couldn't parse"
- Just x -> do
- hoist $ buildAST x
+ Just ast -> do
+ hoist $ buildAST ast
mostRecentDef >>= liftIO . Text.hPutStrLn stderr . ppll
repl
where
+ eofHandler e
+ | isEOFError e = return Nothing
+ | otherwise = ioError e
type Binds = Map.Map String Operand
flip runReaderT binds $ buildExpr body >>= ret
where params = zip (repeat Type.double) (map fromString paramStrs)
+buildAST (Extern (Prototype nameStr params)) =
+ extern (fromString nameStr) (replicate (length params) Type.double) Type.double
+
buildAST (TopLevelExpr x) = function "__anon_expr" [] Type.double $
const $ flip runReaderT mempty $ buildExpr x >>= ret
K.Cmp LT -> fcmp OLT
K.Cmp GT -> fcmp OGT
K.Cmp EQ -> fcmp OEQ
+
+buildExpr (Call callee params) = do
+ paramOps <- mapM buildExpr params
+ let nam = fromString callee
+ -- get a pointer to the function
+ typ = FunctionType Type.double (replicate (length params) Type.double) False
+ ptrTyp = Type.PointerType typ (AddrSpace 0)
+ ref = GlobalReference ptrTyp nam
+ call (ConstantOperand ref) (zip paramOps (repeat []))