3 files changed, 4 insertions, 0 deletions
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index a7b5fa7dfd2..e92672a785d 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -1727,6 +1727,7 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
                                 diag::warn_module_config_mismatch)
             << ModuleFileName;
       // Fall through to error out.
+      LLVM_FALLTHROUGH;
     case ASTReader::VersionMismatch:
     case ASTReader::HadErrors:
       ModuleLoader::HadFatalFailure = true;
diff --git a/clang/lib/Frontend/InitHeaderSearch.cpp b/clang/lib/Frontend/InitHeaderSearch.cpp
index d50fb6d788a..1d7c8a0c871 100644
--- a/clang/lib/Frontend/InitHeaderSearch.cpp
+++ b/clang/lib/Frontend/InitHeaderSearch.cpp
@@ -221,6 +221,7 @@ void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
     case llvm::Triple::Win32:
       if (triple.getEnvironment() != llvm::Triple::Cygnus)
         break;
+      LLVM_FALLTHROUGH;
     default:
       // FIXME: temporary hack: hard-coded paths.
       AddPath("/usr/local/include", System, false);
@@ -343,6 +344,7 @@ void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
     AddPath(BaseSDKPath + "/target/include", System, false);
     if (triple.isPS4CPU())
       AddPath(BaseSDKPath + "/target/include_common", System, false);
+    LLVM_FALLTHROUGH;
   }
   default:
     AddPath("/usr/include", ExternCSystem, false);
diff --git a/clang/lib/Frontend/SerializedDiagnosticReader.cpp b/clang/lib/Frontend/SerializedDiagnosticReader.cpp
index c4461d452e7..8a8161488f4 100644
--- a/clang/lib/Frontend/SerializedDiagnosticReader.cpp
+++ b/clang/lib/Frontend/SerializedDiagnosticReader.cpp
@@ -125,6 +125,7 @@ SerializedDiagnosticReader::readMetaBlock(llvm::BitstreamCursor &Stream) {
     case Cursor::BlockBegin:
       if (Stream.SkipBlock())
         return SDError::MalformedMetadataBlock;
+      LLVM_FALLTHROUGH;
     case Cursor::BlockEnd:
       if (!VersionChecked)
         return SDError::MissingVersion;