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.CodeModel
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 $ \_ -> build ast >>= ret
+ program <- read <$> getContents
+ let mdl = buildModule "main" $ mapM buildAST program
Text.hPutStrLn stderr (ppllvm mdl)
withContext $ \ctx ->
withMCJIT ctx Nothing Nothing Nothing Nothing $ \mcjit ->
let f' = castFunPtr f :: FunPtr (IO Float)
exprFun f' >>= print
-build :: AST.Expr -> IRBuilderT ModuleBuilder Operand
-build (AST.Num a) = pure $ ConstantOperand (Float (Single a))
-build (AST.BinOp op a b) = do
- va <- build a
- vb <- build b
+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