Check the type of if condition

diff --git a/Main.hs b/Main.hs
index 89fd91a39cf663048b77497b879e9d01903e5751..328aaf3c72c56d9b1d13f4f1de4376cf07b5681d 100644 (file)
--- a/Main.hs
+++ b/Main.hs
@@ -23,6 +23,7 @@ import LLVM.AST.Float
 import LLVM.AST.FloatingPointPredicate hiding (False, True)
 import LLVM.AST.Operand
 import LLVM.AST.Type as Type
+import LLVM.AST.Typed
 import LLVM.Pretty
 
 import Debug.Trace
@@ -90,7 +91,9 @@ buildExpr binds (AST.BinOp op a b) = do
 
 buildExpr binds (AST.If cond thenE elseE) = mdo
   _ifB <- block `named` "if"
+
   condV <- buildExpr binds cond
+  when (typeOf condV /= i1) $ lift $ lift $ Left "Not a boolean"
   condBr condV thenB elseB
 
   thenB <- block `named` "then"