diff --git a/llvm/utils/prepare-code-coverage-artifact.py b/llvm/utils/prepare-code-coverage-artifact.py
--- a/llvm/utils/prepare-code-coverage-artifact.py
+++ b/llvm/utils/prepare-code-coverage-artifact.py
@@ -67,6 +67,7 @@
             "-o",
             report_dir,
             "-show-line-counts-or-regions",
+            "-show-directory-coverage",
             "-Xdemangler",
             "c++filt",
             "-Xdemangler",