virtual-destructor-calls.cpp revision 93ab6bf534fb6c26563c00f28a8fc5581bb71dfd 
1// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-apple-darwin10 -mconstructor-aliases | FileCheck %s
2
3struct Member {
4  ~Member();
5};
6
7struct A {
8  virtual ~A();
9};
10
11struct B : A {
12  Member m;
13  virtual ~B();
14};
15
16// Complete dtor: just an alias because there are no virtual bases.
17// CHECK: @_ZN1BD1Ev = alias {{.*}} @_ZN1BD2Ev
18
19// (aliases from C)
20// CHECK: @_ZN1CD1Ev = alias {{.*}} @_ZN1CD2Ev
21// CHECK: @_ZN1CD2Ev = alias bitcast {{.*}} @_ZN1BD2Ev
22
23// Deleting dtor: defers to the complete dtor.
24// CHECK-LABEL: define void @_ZN1BD0Ev(%struct.B* %this) unnamed_addr
25// CHECK: call void @_ZN1BD1Ev
26// CHECK: call void @_ZdlPv
27
28// Base dtor: actually calls A's base dtor.
29// CHECK-LABEL: define void @_ZN1BD2Ev(%struct.B* %this) unnamed_addr
30// CHECK: call void @_ZN6MemberD1Ev
31// CHECK: call void @_ZN1AD2Ev
32
33B::~B() { }
34
35struct C : B {
36  ~C();
37};
38
39C::~C() { }
40
41// Complete dtor: just an alias (checked above).
42
43// Deleting dtor: defers to the complete dtor.
44// CHECK-LABEL: define void @_ZN1CD0Ev(%struct.C* %this) unnamed_addr
45// CHECK: call void @_ZN1CD1Ev
46// CHECK: call void @_ZdlPv
47
48// Base dtor: just an alias to B's base dtor.
49
50namespace PR12798 {
51  // A qualified call to a base class destructor should not undergo virtual
52  // dispatch. Template instantiation used to lose the qualifier.
53  struct A { virtual ~A(); };
54  template<typename T> void f(T *p) { p->A::~A(); }
55
56  // CHECK: define {{.*}} @_ZN7PR127981fINS_1AEEEvPT_(
57  // CHECK: call void @_ZN7PR127981AD1Ev(
58  template void f(A*);
59}
60