diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 12e4e25bd29c4..15c4a323b7d6a 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -14101,6 +14101,7 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const CallExpr *E,
       return Success(Result, E);
     }
     }
+    llvm_unreachable("Fully covered switch above");
   }
   case Builtin::BIstrlen:
   case Builtin::BIwcslen:
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index b50549219e4e8..08cd98fd04df0 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -3520,6 +3520,7 @@ std::string tools::complexRangeKindToStr(LangOptions::ComplexRangeKind Range) {
     return "none";
     break;
   }
+  llvm_unreachable("Fully covered switch above");
 }
 
 std::string