[clang][NFC] Use SmallString instead of SmallVector<char

Simplifies code in some places and is more explicit about what is being used.
No additional includes were added here so no impact on compile time.

1 files changed, 3 insertions, 4 deletions

diff --git a/clang/lib/Serialization/GlobalModuleIndex.cpp b/clang/lib/Serialization/GlobalModuleIndex.cpp
index 9192b3b..52ce17d 100644
--- a/clang/lib/Serialization/GlobalModuleIndex.cpp
+++ b/clang/lib/Serialization/GlobalModuleIndex.cpp
@@ -905,7 +905,7 @@ GlobalModuleIndex::writeIndex(FileManager &FileMgr,
   }
 
   // The output buffer, into which the global index will be written.
-  SmallVector<char, 16> OutputBuffer;
+  SmallString<16> OutputBuffer;
   {
     llvm::BitstreamWriter OutputStream(OutputBuffer);
     if (Builder.writeIndex(OutputStream))
@@ -913,9 +913,8 @@ GlobalModuleIndex::writeIndex(FileManager &FileMgr,
                                      "failed writing index");
   }
 
-  return llvm::writeFileAtomically(
-      (IndexPath + "-%%%%%%%%").str(), IndexPath,
-      llvm::StringRef(OutputBuffer.data(), OutputBuffer.size()));
+  return llvm::writeFileAtomically((IndexPath + "-%%%%%%%%").str(), IndexPath,
+                                   OutputBuffer);
 }
 
 namespace {