Fix arithmetic type check

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@58429 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index 87b91ae..3898ba0 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -587,7 +587,8 @@
 
 bool Type::isArithmeticType() const {
   if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
-    return BT->getKind() != BuiltinType::Void;
+    return BT->getKind() >= BuiltinType::Bool &&
+           BT->getKind() <= BuiltinType::LongDouble;
   if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
     // GCC allows forward declaration of enum types (forbid by C99 6.7.2.3p2).
     // If a body isn't seen by the time we get here, return false.