Avoid warnings from compilers that think you can drop off the end of a fully covered...

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177656 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/ToolChain.cpp b/lib/Driver/ToolChain.cpp
index 59932f611ec9933f58be6e4937872e0bea399a56..b24de5d132a5485d077f530cdc788a2645983adc 100644 (file)
--- a/lib/Driver/ToolChain.cpp
+++ b/lib/Driver/ToolChain.cpp
@@ -113,6 +113,8 @@ Tool *ToolChain::getTool(Action::ActionClass AC) const {
   case Action::MigrateJobClass:
     return getClang();
   }
+
+  llvm_unreachable("Invalid tool kind.");
 }
 
 Tool &ToolChain::SelectTool(const JobAction &JA) const {