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1 // no PCH
2 // RUN: %clang_cc1 -emit-llvm-only -include %s -include %s %s
3 // with PCH
4 // RUN: %clang_cc1 -emit-llvm-only -chain-include %s -chain-include %s %s
5 #if !defined(PASS1)
6 #define PASS1
7 
8 // A base with a virtual dtor.
9 struct A {
10   virtual ~A();
11 };
12 
13 // A derived class with an implicit virtual dtor.
14 struct B : A {
15   // Key function to suppress vtable definition.
16   virtual void virt();
17 };
18 
19 #elif !defined(PASS2)
20 #define PASS2
21 
22 // Further derived class that requires ~B().
23 // Causes definition of ~B(), but it was lost when saving PCH.
24 struct C : B {
25   C();
~CC26   ~C() {}
27 };
28 
29 #else
30 
foo()31 void foo() {
32   // Variable that requires ~C().
33   C c;
34 }
35 
36 // VTable placement would again cause definition of ~B(), hiding the bug,
37 // if not for B::virt(), which suppresses the placement.
38 
39 #endif
40