[clang][Diagnostics][NFC] Use getFileID() directly

Instead of calling getDecomposedLoc() and then only using the FileID.

diff --git a/clang/lib/Frontend/TextDiagnostic.cpp b/clang/lib/Frontend/TextDiagnostic.cpp
index 83f254f..a03c185 100644 (file)
--- a/clang/lib/Frontend/TextDiagnostic.cpp
+++ b/clang/lib/Frontend/TextDiagnostic.cpp
@@ -1144,9 +1144,7 @@ void TextDiagnostic::emitSnippetAndCaret(
       (LastLevel != DiagnosticsEngine::Note || Level == LastLevel))
     return;
 
-  // Decompose the location into a FID/Offset pair.
-  std::pair<FileID, unsigned> LocInfo = Loc.getDecomposedLoc();
-  FileID FID = LocInfo.first;
+  FileID FID = Loc.getFileID();
   const SourceManager &SM = Loc.getManager();
 
   // Get information about the buffer it points into.