1 files changed, 6 insertions, 0 deletions
diff --git a/lib/AST/ExprConstant.cpp b/lib/AST/ExprConstant.cpp
index db9536633b..de6a14b87b 100644
--- a/lib/AST/ExprConstant.cpp
+++ b/lib/AST/ExprConstant.cpp
@@ -428,6 +428,12 @@ public:
     return true;
   }
 
+  bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) {
+    Result.zextOrTrunc(getIntTypeSizeInBits(E->getType()));
+    Result = E->Evaluate();
+    return true;
+  }
+
 private:
   bool HandleCast(CastExpr* E);
 };