Fix "not all control paths return a value" warning on MSVC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274011 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/tools/llvm-cov/SourceCoverageView.cpp b/tools/llvm-cov/SourceCoverageView.cpp
index f9ce946dc5f795a981da47a348d9388a134888dc..4170fb44e94d56216883bc0cb4fe02548bee4a3f 100644 (file)
--- a/tools/llvm-cov/SourceCoverageView.cpp
+++ b/tools/llvm-cov/SourceCoverageView.cpp
@@ -102,6 +102,7 @@ SourceCoverageView::create(StringRef SourceName, const MemoryBuffer &File,
     return llvm::make_unique<SourceCoverageViewText>(SourceName, File, Options,
                                                      std::move(CoverageInfo));
   }
+  llvm_unreachable("Unknown coverage output format!");
 }
 
 void SourceCoverageView::print(raw_ostream &OS, bool WholeFile,