+ Nothing -> liftIO $ hPutStrLn stderr "Couldn't parse"
+ Just x -> do
+ hoist $ buildAST x
+ mostRecentDef >>= liftIO . Text.hPutStrLn stderr . ppll
+ repl
+ where
+
+type Binds = Map.Map String Operand
+
+buildAST :: AST -> ModuleBuilder Operand
+buildAST (Function (Prototype nameStr paramStrs) body) = do
+ let n = fromString nameStr
+ function n params Type.double $ \ops -> do
+ let binds = Map.fromList (zip paramStrs ops)
+ 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
+
+buildExpr :: Expr -> ReaderT Binds (IRBuilderT ModuleBuilder) Operand
+buildExpr (Num x) = pure $ ConstantOperand (Float (Double x))
+buildExpr (Var n) = do
+ binds <- ask
+ case binds Map.!? n of
+ Just x -> pure x
+ Nothing -> error $ "'" <> n <> "' doesn't exist in scope"
+
+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