Index: llvm/lib/ProfileData/GCOV.cpp
===================================================================
--- llvm/lib/ProfileData/GCOV.cpp
+++ llvm/lib/ProfileData/GCOV.cpp
@@ -140,6 +140,13 @@
         if (version >= GCOV::V900)
           fn->endColumn = buf.getWord();
       }
+
+      // unify filename, as the same path can have different form
+      SmallString<256> P;
+      P.assign(filename);
+      sys::path::remove_dots(P, true);
+      filename = P.str();
+
       auto r = filenameToIdx.try_emplace(filename, filenameToIdx.size());
       if (r.second)
         filenames.emplace_back(filename);