Generate code for binary operations

[kaleidoscope-hs.git] / Main.hs

diff --git a/Main.hs b/Main.hs
index ec0de8c8bcfd731b298ed5a09c5df8784e9f0fd3..ca6629ab447cd64b7c8748eec07ffa7fe6b34e9d 100644 (file)
--- a/Main.hs
+++ b/Main.hs
@@ -1,10 +1,53 @@
-import AST
+{-# 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
-main = do
-  hPutStr stderr "ready> "
-  ast <- (readMaybe <$> getLine) :: IO (Maybe AST)
+import Text.Read (readMaybe)
+
+main = buildModuleT "main" repl
+
+repl :: ModuleBuilderT IO ()
+repl = do
+  liftIO $ hPutStr stderr "ready> "
+  ast <- liftIO $ readMaybe <$> getLine
   case ast of
-    Just x -> hPrint stderr x
-    Nothing ->  hPutStrLn stderr "Couldn't parse"
-  main
+    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