--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/PCH/source-manager-stack.c	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,12 @@
+// Test that the source manager has the "proper" idea about the include stack
+// when using PCH.
+
+// RUN: echo 'int x;' > %t.prefix.h
+// RUN: not %clang_cc1 -fsyntax-only -fdiagnostics-show-note-include-stack -include %t.prefix.h %s 2> %t.diags.no_pch.txt
+// RUN: %clang_cc1 -emit-pch -o %t.prefix.pch %t.prefix.h
+// RUN: not %clang_cc1 -fsyntax-only -fdiagnostics-show-note-include-stack -include-pch %t.prefix.pch %s 2> %t.diags.pch.txt
+// RUN: diff %t.diags.no_pch.txt %t.diags.pch.txt
+// XFAIL: *
+// PR5662
+
+float x;