[clangd] Set buffer name for main file. NFCI

llvm-svn: 366675

1 files changed, 6 insertions, 5 deletions

diff --git a/clang-tools-extra/clangd/ClangdUnit.cpp b/clang-tools-extra/clangd/ClangdUnit.cpp
index 3e9db706cfa..9908fee32b1 100644
--- a/clang-tools-extra/clangd/ClangdUnit.cpp
+++ b/clang-tools-extra/clangd/ClangdUnit.cpp
@@ -570,7 +570,8 @@ buildPreamble(PathRef FileName, CompilerInvocation &CI,
               PreambleParsedCallback PreambleCallback) {
   // Note that we don't need to copy the input contents, preamble can live
   // without those.
-  auto ContentsBuffer = llvm::MemoryBuffer::getMemBuffer(Inputs.Contents);
+  auto ContentsBuffer =
+      llvm::MemoryBuffer::getMemBuffer(Inputs.Contents, FileName);
   auto Bounds =
       ComputePreambleBounds(*CI.getLangOpts(), ContentsBuffer.get(), 0);
 
@@ -650,10 +651,10 @@ buildAST(PathRef FileName, std::unique_ptr<CompilerInvocation> Invocation,
     // dirs.
   }
 
-  return ParsedAST::build(llvm::make_unique<CompilerInvocation>(*Invocation),
-                          Preamble,
-                          llvm::MemoryBuffer::getMemBufferCopy(Inputs.Contents),
-                          std::move(VFS), Inputs.Index, Inputs.Opts);
+  return ParsedAST::build(
+      llvm::make_unique<CompilerInvocation>(*Invocation), Preamble,
+      llvm::MemoryBuffer::getMemBufferCopy(Inputs.Contents, FileName),
+      std::move(VFS), Inputs.Index, Inputs.Opts);
 }
 
 SourceLocation getBeginningOfIdentifier(const ParsedAST &Unit,