diff --git a/clang/test/Modules/Inputs/lsv-debuginfo/A/ADT.h b/clang/test/Modules/Inputs/lsv-debuginfo/A/ADT.h
new file mode 100644
index 0000000..f48d4f7
--- /dev/null
+++ b/clang/test/Modules/Inputs/lsv-debuginfo/A/ADT.h
@@ -0,0 +1,45 @@
+#ifndef ADT
+#define ADT
+
+#ifdef WITH_NAMESPACE
+namespace llvm {
+#endif
+template <unsigned Alignment, unsigned Size>
+struct AlignedCharArray {
+  alignas(Alignment) char buffer[Size];
+};
+
+template <typename T1>
+class AlignerImpl {
+  T1 t1;
+};
+
+template <typename T1>
+union SizerImpl {
+  char arr1[sizeof(T1)];
+};
+
+template <typename T1>
+struct AlignedCharArrayUnion
+    : AlignedCharArray<alignof(AlignerImpl<T1>), sizeof(SizerImpl<T1>)> {};
+
+template <typename T, unsigned N>
+struct SmallVectorStorage {
+  AlignedCharArrayUnion<T> InlineElts[N];
+};
+template <typename T, unsigned N>
+class SmallVector : SmallVectorStorage<T, N> {};
+
+template <typename T>
+struct OptionalStorage {
+  AlignedCharArrayUnion<T> storage;
+};
+template <typename T>
+class Optional {
+  OptionalStorage<T> Storage;
+};
+
+#ifdef WITH_NAMESPACE
+} // namespace llvm
+#endif
+#endif
diff --git a/clang/test/Modules/Inputs/lsv-debuginfo/B/B.h b/clang/test/Modules/Inputs/lsv-debuginfo/B/B.h
new file mode 100644
index 0000000..c00bc3c
--- /dev/null
+++ b/clang/test/Modules/Inputs/lsv-debuginfo/B/B.h
@@ -0,0 +1,14 @@
+#ifndef B_H
+#define B_H
+#include <A/ADT.h>
+#include <C/C.h>
+
+namespace llvm {
+struct S {
+  unsigned a, b, c, d;
+};
+class C {
+  Optional<S> S;
+};
+}
+#endif
diff --git a/clang/test/Modules/Inputs/lsv-debuginfo/C/C.h b/clang/test/Modules/Inputs/lsv-debuginfo/C/C.h
new file mode 100644
index 0000000..52c6e4d
--- /dev/null
+++ b/clang/test/Modules/Inputs/lsv-debuginfo/C/C.h
@@ -0,0 +1,13 @@
+#ifndef C_H
+#define C_H
+#include <A/ADT.h>
+
+namespace llvm {
+class D {
+  struct Q {
+    unsigned a, b, c, d;
+  };
+  SmallVector<Q, 4> q;
+};
+} // namespace llvm
+#endif
diff --git a/clang/test/Modules/Inputs/lsv-debuginfo/module.modulemap b/clang/test/Modules/Inputs/lsv-debuginfo/module.modulemap
new file mode 100644
index 0000000..5bb0449
--- /dev/null
+++ b/clang/test/Modules/Inputs/lsv-debuginfo/module.modulemap
@@ -0,0 +1,9 @@
+module A {
+  umbrella "A" module * { export * }
+}
+module B {
+  umbrella "B" module * { export * }
+}
+module C {
+  umbrella "C" module * { export * }
+}