clang/test/CodeGenCXX/pr18962.cpp

   1 // RUN: %clang_cc1 -triple i686-linux-gnu %s -emit-llvm -o - | FileCheck %s
   2
   3 class A {
   4   // append has to have the same prototype as fn1 to tickle the bug.
   5   void (*append)(A *);
   6 };
   7
   8 class B {};
   9 class 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.
  13 class C {
  14   // This member creates a circular LLVM type reference to %class.D.
  15   D *m_group;
  16   B changeListeners;
  17 };
  18 class D : C {};
  19
  20 A p1;
  21 C p2;
  22 D p3;
  23
  24 // We end up using an opaque type for 'append' to avoid circular references.
  25 // CHECK: %class.A = type { ptr }
  26 // CHECK: %class.C = type <{ ptr, [4 x i8] }>
  27 // CHECK: %class.D = type { %class.C.base, [3 x i8] }
  28 // CHECK: %class.C.base = type <{ ptr, i8 }>