X-Git-Url: https://git.lukelau.me/?p=kaleidoscope-hs.git;a=blobdiff_plain;f=Main.hs;h=bff1c08c965c037080cc6aba052a60c40f1dc999;hp=ca6629ab447cd64b7c8748eec07ffa7fe6b34e9d;hb=bdb5ef3da162c9a093c61d48d5deec8262943047;hpb=fb7d66e2e530c51a6a20239f8f2cd644f40fecea

diff --git a/Main.hs b/Main.hs
index ca6629a..bff1c08 100644
--- a/Main.hs
+++ b/Main.hs
@@ -2,38 +2,79 @@
 
 import AST as K -- K for Kaleidoscope
 import Utils
+import Control.Monad.Trans.Reader
 import Control.Monad.IO.Class
+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.AST.Operand
 import LLVM.AST.Type as Type
+import LLVM.Context
 import LLVM.IRBuilder
+import LLVM.Module
+import LLVM.PassManager
 import LLVM.Pretty
+import LLVM.Target
 import System.IO
+import System.IO.Error
 import Text.Read (readMaybe)
 
-main = buildModuleT "main" repl
+main :: IO ()
+main = do
+  mdl' <- buildModuleT "main" repl
+  withContext $ \ctx -> withHostTargetMachine $ \tm ->
+    withModuleFromAST ctx mdl' $ \mdl -> do
+      let spec = defaultCuratedPassSetSpec { optLevel = Just 3 }
+      -- this returns true if the module was modified
+      withPassManager spec $ flip runPassManager mdl
+      Text.hPutStrLn stderr . ("\n" <>) . ppllvm =<< moduleAST mdl
 
 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
 
 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 $ buildExpr x >>= ret
+  const $ flip runReaderT mempty $ buildExpr x >>= ret
 
-buildExpr :: Expr -> IRBuilderT ModuleBuilder Operand
+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
@@ -51,3 +92,12 @@ buildExpr (BinOp op a b) = do
                   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 []))