--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/Tooling/pch.cpp	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,14 @@
+// This is a regression test for handling of stat caches within the tooling
+// infrastructure. This test reproduces the problem under valgrind:
+
+// First, create a pch that we can later load. Loading the pch will insert
+// a stat cache into the FileManager:
+// RUN: %clang -x c++-header %S/Inputs/pch.h -o %t1
+
+// Use the generated pch and enforce a subsequent stat miss by using
+// the test file with an unrelated include as second translation unit.
+// Test for an non-empty file after clang-check is executed.
+// RUN: clang-check -ast-dump "%S/Inputs/pch.cpp" "%s" -- -include-pch %t1 -I "%S" -c >%t2 2>&1
+// RUN: test -s %t2
+
+#include "Inputs/pch-fail.h"