-main = pure ()
+{-# LANGUAGE OverloadedStrings #-}
+
+import AST as K -- K for Kaleidoscope
+import Utils
+import Control.Monad.IO.Class
+import qualified Data.Text.Lazy.IO as Text
+import LLVM.AST.Constant
+import LLVM.AST.Float
+import LLVM.AST.FloatingPointPredicate hiding (False, True)
+import LLVM.AST.Operand
+import LLVM.AST.Type as Type
+import LLVM.IRBuilder
+import LLVM.Pretty
+import System.IO
+import Text.Read (readMaybe)
+
+main = buildModuleT "main" repl
+
+repl :: ModuleBuilderT IO ()
+repl = do
+ liftIO $ hPutStr stderr "ready> "
+ ast <- liftIO $ readMaybe <$> getLine
+ case ast of
+ Nothing -> liftIO $ hPutStrLn stderr "Couldn't parse"
+ Just x -> do
+ hoist $ buildAST x
+ mostRecentDef >>= liftIO . Text.hPutStrLn stderr . ppll
+ repl
+ where
+
+buildAST :: AST -> ModuleBuilder Operand
+buildAST (TopLevelExpr x) = function "__anon_expr" [] Type.double $
+ const $ buildExpr x >>= ret
+
+buildExpr :: Expr -> IRBuilderT ModuleBuilder Operand
+buildExpr (Num x) = pure $ ConstantOperand (Float (Double x))
+buildExpr (BinOp op a b) = do
+ opA <- buildExpr a
+ opB <- buildExpr b
+ tmp <- instr opA opB
+ if isCmp
+ then uitofp tmp Type.double
+ else return tmp
+ where isCmp
+ | Cmp _ <- op = True
+ | otherwise = False
+ instr = case op of
+ K.Add -> fadd
+ K.Sub -> fsub
+ K.Mul -> fmul
+ K.Cmp LT -> fcmp OLT
+ K.Cmp GT -> fcmp OGT
+ K.Cmp EQ -> fcmp OEQ