1// RUN: %clang_cc1 -triple i686-linux-gnu %s -emit-llvm -o - | FileCheck %s
2
3class A {
4  // append has to have the same prototype as fn1 to tickle the bug.
5  void (*append)(A *);
6};
7
8class B {};
9class D;
10
11// C has to be non-C++98 POD with available tail padding, making the LLVM base
12// type differ from the complete LLVM type.
13class C {
14  // This member creates a circular LLVM type reference to %class.D.
15  D *m_group;
16  B changeListeners;
17};
18class D : C {};
19
20void fn1(A *p1) {
21}
22
23void
24fn2(C *) {
25}
26
27// We end up using an opaque type for 'append' to avoid circular references.
28// CHECK: %class.A = type { {}* }
29// CHECK: %class.C = type { %class.D*, %class.B }
30// CHECK: %class.D = type { %class.C.base, [3 x i8] }
31// CHECK: %class.C.base = type <{ %class.D*, %class.B }>
32// CHECK: %class.B = type { i8 }
33