From a30b5c5a51f95dc81fdfbeea42cc01b451cd5a08 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Fri, 5 Jun 2020 10:41:31 +0100
Subject: [PATCH] Fix MSVC "not all control paths return a value" warning. NFC.

Add llvm_unreachable after switch statement for TestLanguage enum
---
 clang/lib/Testing/CommandLineArgs.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/clang/lib/Testing/CommandLineArgs.cpp b/clang/lib/Testing/CommandLineArgs.cpp
index 7375dbc6ee70..cd4d8c188da9 100644
--- a/clang/lib/Testing/CommandLineArgs.cpp
+++ b/clang/lib/Testing/CommandLineArgs.cpp
@@ -64,6 +64,7 @@ StringRef getFilenameForTesting(TestLanguage Lang) {
   case Lang_OBJCXX:
     return "input.mm";
   }
+  llvm_unreachable("Unhandled TestLanguage enum");
 }
 
 } // end namespace clang