Fix GCC -Wreturn-type warnings. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@373422 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/BinaryFormat/Dwarf.h b/include/llvm/BinaryFormat/Dwarf.h
index 21962bfd69f8c2a1942c9fdb7ed50db0e4c525c6..21cdc6a88d01de061aec2dfc045d0215969882fd 100644 (file)
--- a/include/llvm/BinaryFormat/Dwarf.h
+++ b/include/llvm/BinaryFormat/Dwarf.h
@@ -230,6 +230,7 @@ inline bool isCPlusPlus(SourceLanguage S) {
   case DW_LANG_hi_user:
     return false;
   }
+  llvm_unreachable("Invalid source language");
 }
 
 enum CaseSensitivity {