microsoft-abi-structors.cpp revision 59660c21178b6af518bd4b564e032d5c9cc218cb 
1// RUN: %clang_cc1 -emit-llvm %s -o - -cxx-abi microsoft -triple=i386-pc-win32 -fno-rtti > %t 2>&1
2// RUN: FileCheck %s < %t
3// Using a different check prefix as the inline destructors might be placed
4// anywhere in the output.
5// RUN: FileCheck --check-prefix=DTORS %s < %t
6
7class A {
8 public:
9  A() { }
10  ~A() { }
11};
12
13void no_constructor_destructor_infinite_recursion() {
14  A a;
15
16// CHECK:      define linkonce_odr x86_thiscallcc %class.A* @"\01??0A@@QAE@XZ"(%class.A* %this)
17// CHECK:        [[THIS_ADDR:%[.0-9A-Z_a-z]+]] = alloca %class.A*, align 4
18// CHECK-NEXT:   store %class.A* %this, %class.A** [[THIS_ADDR]], align 4
19// CHECK-NEXT:   [[T1:%[.0-9A-Z_a-z]+]] = load %class.A** [[THIS_ADDR]]
20// CHECK-NEXT:   ret %class.A* [[T1]]
21// CHECK-NEXT: }
22
23// Make sure that the destructor doesn't call itself:
24// CHECK: define {{.*}} @"\01??1A@@QAE@XZ"
25// CHECK-NOT: call void @"\01??1A@@QAE@XZ"
26// CHECK: ret
27}
28
29struct B {
30  virtual ~B() {
31// Complete destructor first:
32// DTORS: define {{.*}} x86_thiscallcc void @"\01??1B@@UAE@XZ"(%struct.B* %this)
33//
34// Then, the scalar deleting destructor (used in the vtable):
35// DTORS:      define {{.*}} x86_thiscallcc void @"\01??_GB@@UAEPAXI@Z"(%struct.B* %this, i1 zeroext %should_call_delete)
36// DTORS:        %0 = icmp eq i8 %should_call_delete{{.*}}, 0
37// DTORS-NEXT:   br i1 %0, label %dtor.continue, label %dtor.call_delete
38// DTORS:      dtor.call_delete:
39// DTORS-NEXT:   %1 = bitcast %struct.B* %this1 to i8*
40// DTORS-NEXT:   call void @"\01??3@YAXPAX@Z"(i8* %1) nounwind
41// DTORS-NEXT:   br label %dtor.continue
42// DTORS:      dtor.continue:
43// DTORS-NEXT:   ret void
44  }
45  virtual void foo();
46};
47
48// Emits the vftable in the output.
49void B::foo() {}
50
51void check_vftable_offset() {
52  B b;
53// The vftable pointer should point at the beginning of the vftable.
54// CHECK: [[THIS_PTR:%[0-9]+]] = bitcast %struct.B* {{.*}} to i8***
55// CHECK: store i8** getelementptr inbounds ([2 x i8*]* @"\01??_7B@@6B@", i64 0, i64 0), i8*** [[THIS_PTR]]
56}
57
58// FIXME: Enable the following block and add expectations when calls
59// to virtual complete dtor are supported.
60#if 0
61void call_complete_dtor(B *obj_ptr) {
62  obj_ptr->~B();
63}
64#endif
65
66void call_deleting_dtor(B *obj_ptr) {
67// FIXME: Add CHECKs when calls to virtual deleting dtor are generated properly.
68  delete obj_ptr;
69}
70
71struct C {
72  static int foo();
73
74  C() {
75    static int ctor_static = foo();
76    // CHECK that the static in the ctor gets mangled correctly:
77    // CHECK: @"\01?ctor_static@?1???0C@@QAE@XZ@4HA"
78  }
79  ~C() {
80    static int dtor_static = foo();
81    // CHECK that the static in the dtor gets mangled correctly:
82    // CHECK: @"\01?dtor_static@?1???1C@@QAE@XZ@4HA"
83  }
84};
85
86void use_C() { C c; }
87