1 files changed, 27 insertions, 0 deletions
diff --git a/clang/test/CodeGenCXX/thunk-returning-memptr.cpp b/clang/test/CodeGenCXX/thunk-returning-memptr.cpp
new file mode 100644
index 00000000000..0b7870c6d65
--- /dev/null
+++ b/clang/test/CodeGenCXX/thunk-returning-memptr.cpp
@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -triple=i686 -emit-llvm -o - %s | FileCheck %s
+
+
+struct X;
+typedef void (X::*memptr)();
+
+struct A {
+  virtual memptr f();
+};
+
+struct B {
+  virtual memptr f();
+};
+
+struct C : A, B {
+  C();
+  memptr f() override __attribute__((noinline)) { return nullptr; };
+};
+
+C::C() {}
+
+// Make sure the member pointer is returned from the thunk via the return slot.
+// Because of the tail call, the return value cannot be copied into a local
+// alloca. (PR39901)
+
+// CHECK-LABEL: define linkonce_odr void @_ZThn4_N1C1fEv({ i32, i32 }* noalias sret %agg.result, %struct.C* %this)
+// CHECK: tail call void @_ZN1C1fEv({ i32, i32 }* sret %agg.result