[Coverage] Clarify a function contract (NFC)

llvm-svn: 282287

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h b/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h
index 7c4c6d61700..3d0c3d30d79 100644
--- a/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h
+++ b/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h
@@ -441,7 +441,8 @@ public:
   /// can't be associated with any coverage information.
   unsigned getMismatchedCount() { return MismatchedFunctionCount; }
 
-  /// \brief Returns the list of files that are covered.
+  /// \brief Returns a lexicographically sorted, unique list of files that are
+  /// covered.
   std::vector<StringRef> getUniqueSourceFiles() const;
 
   /// \brief Get the coverage for a particular file.