module Main where
import qualified AST
+import qualified Data.Map as Map
import qualified Data.Text.Lazy.IO as Text
+import Data.String
+import Foreign.Ptr
+import System.IO
+import LLVM.Context
+import LLVM.ExecutionEngine
+import LLVM.Module
import LLVM.IRBuilder
+import LLVM.AST.AddrSpace
import LLVM.AST.Constant
import LLVM.AST.Float
import LLVM.AST.Operand
-import LLVM.AST.Type
+import LLVM.AST.Type as Type
import LLVM.Pretty
+foreign import ccall "dynamic" exprFun :: FunPtr (IO Float) -> IO Float
+
main :: IO ()
main = do
- ast <- read <$> getContents
- let mdl = buildModule "main" $
- function "expr" [] float $ \_ -> do
- build ast
- return ()
- Text.putStrLn (ppllvm mdl)
-
-build :: AST.Expr -> IRBuilderT ModuleBuilder Operand
-build (AST.Num a) = pure $ ConstantOperand (Float (Single a))
-build (AST.Add a b) = do
- va <- build a
- vb <- build b
- fadd va vb
+ program <- read <$> getContents
+ let mdl = buildModule "main" $ mapM buildAST program
+ Text.hPutStrLn stderr (ppllvm mdl)
+ withContext $ \ctx ->
+ withMCJIT ctx Nothing Nothing Nothing Nothing $ \mcjit ->
+ withModuleFromAST ctx mdl $ \mdl' ->
+ withModuleInEngine mcjit mdl' $ \emdl -> do
+ Just f <- getFunction emdl "expr"
+ let f' = castFunPtr f :: FunPtr (IO Float)
+ exprFun f' >>= print
+
+buildAST :: AST.AST -> ModuleBuilder Operand
+buildAST (AST.Function nameStr paramStrs body) = do
+ let name = fromString nameStr
+ function name params float $ \binds -> do
+ let bindMap = Map.fromList (zip paramStrs binds)
+ buildExpr bindMap body >>= ret
+ where params = zip (repeat float) (map fromString paramStrs)
+buildAST (AST.Eval e) =
+ function "expr" [] float $ \_ -> buildExpr mempty e >>= ret
+
+buildExpr :: Map.Map String Operand -> AST.Expr -> IRBuilderT ModuleBuilder Operand
+buildExpr _ (AST.Num a) = pure $ ConstantOperand (Float (Single a))
+buildExpr binds (AST.Var name) = pure $ binds Map.! name
+
+buildExpr binds (AST.Call nameStr params) = do
+ paramOps <- mapM (buildExpr binds) params
+ let name = fromString nameStr
+ -- get a pointer to the function
+ typ = FunctionType float (replicate (length params) float) False
+ ptrTyp = Type.PointerType typ (AddrSpace 0)
+ ref = GlobalReference ptrTyp name
+ call (ConstantOperand ref) (zip paramOps (repeat []))
+
+buildExpr binds (AST.BinOp op a b) = do
+ va <- buildExpr binds a
+ vb <- buildExpr binds b
+ let instr = case op of
+ AST.Add -> fadd
+ AST.Sub -> fsub
+ AST.Mul -> fmul
+ instr va vb