1// RUN: %clang_cc1 -std=c++11 -fno-rtti -emit-llvm -triple=i386-pc-win32 %s -o - | FileCheck %s --check-prefix=CHECK32
2// RUN: %clang_cc1 -std=c++11 -fno-rtti -emit-llvm -triple=x86_64-pc-win32 %s -o - | FileCheck %s --check-prefix=CHECK64
3
4struct S {
5  int x, y, z;
6};
7
8// U is not trivially copyable, and requires inalloca to pass by value.
9struct U {
10  int u;
11  U();
12  ~U();
13  U(const U &);
14};
15
16struct B;
17
18struct C {
19  virtual void foo();
20  virtual int bar(int, double);
21  virtual S baz(int);
22  virtual S qux(U);
23  virtual void thud(...);
24  virtual void (B::*plugh())();
25};
26
27namespace {
28struct D {
29  virtual void foo();
30};
31}
32
33void f() {
34  void (C::*ptr)();
35  ptr = &C::foo;
36  ptr = &C::foo; // Don't crash trying to define the thunk twice :)
37
38  int (C::*ptr2)(int, double);
39  ptr2 = &C::bar;
40
41  S (C::*ptr3)(int);
42  ptr3 = &C::baz;
43
44  void (D::*ptr4)();
45  ptr4 = &D::foo;
46
47  S (C::*ptr5)(U);
48  ptr5 = &C::qux;
49
50  void (C::*ptr6)(...);
51  ptr6 = &C::thud;
52
53  auto ptr7 = &C::plugh;
54
55
56// CHECK32-LABEL: define void @"\01?f@@YAXXZ"()
57// CHECK32: store i8* bitcast (void (%struct.C*, ...)* @"\01??_9C@@$BA@AE" to i8*), i8** %ptr
58// CHECK32: store i8* bitcast (void (%struct.C*, ...)* @"\01??_9C@@$B3AE" to i8*), i8** %ptr2
59// CHECK32: store i8* bitcast (void (%struct.C*, ...)* @"\01??_9C@@$B7AE" to i8*), i8** %ptr3
60// CHECK32: store i8* bitcast (void (%"struct.(anonymous namespace)::D"*, ...)* @"\01??_9D@?A@@$BA@AE" to i8*), i8** %ptr4
61// CHECK32: }
62//
63// CHECK64-LABEL: define void @"\01?f@@YAXXZ"()
64// CHECK64: store i8* bitcast (void (%struct.C*, ...)* @"\01??_9C@@$BA@AA" to i8*), i8** %ptr
65// CHECK64: store i8* bitcast (void (%struct.C*, ...)* @"\01??_9C@@$B7AA" to i8*), i8** %ptr2
66// CHECK64: store i8* bitcast (void (%struct.C*, ...)* @"\01??_9C@@$BBA@AA" to i8*), i8** %ptr3
67// CHECK64: store i8* bitcast (void (%"struct.(anonymous namespace)::D"*, ...)* @"\01??_9D@?A@@$BA@AA" to i8*), i8** %ptr
68// CHECK64: }
69}
70
71
72// Thunk for calling the 1st virtual function in C with no parameters.
73// CHECK32-LABEL: define linkonce_odr x86_thiscallcc void @"\01??_9C@@$BA@AE"(%struct.C* %this, ...)
74// CHECK32: #[[ATTR:[0-9]+]]
75// CHECK32-NOT:             unnamed_addr
76// CHECK32:                 comdat
77// CHECK32: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 0
78// CHECK32: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
79// CHECK32: musttail call x86_thiscallcc void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
80// CHECK32-NEXT: ret void
81// CHECK32: }
82//
83// CHECK64-LABEL: define linkonce_odr void @"\01??_9C@@$BA@AA"(%struct.C* %this, ...)
84// CHECK64: #[[ATTR:[0-9]+]]
85// CHECK64-NOT:             unnamed_addr
86// CHECK64:                 comdat
87// CHECK64: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 0
88// CHECK64: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
89// CHECK64: musttail call void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
90// CHECK64-NEXT: ret void
91// CHECK64: }
92
93// Thunk for calling the 2nd virtual function in C, taking int and double as parameters, returning int.
94// CHECK32-LABEL: define linkonce_odr x86_thiscallcc void @"\01??_9C@@$B3AE"(%struct.C* %this, ...)
95// CHECK32: #[[ATTR]] comdat
96// CHECK32: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 1
97// CHECK32: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
98// CHECK32: musttail call x86_thiscallcc void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
99// CHECK32-NEXT: ret void
100// CHECK32: }
101//
102// CHECK64-LABEL: define linkonce_odr void @"\01??_9C@@$B7AA"(%struct.C* %this, ...)
103// CHECK64: #[[ATTR]] comdat
104// CHECK64: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 1
105// CHECK64: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
106// CHECK64: musttail call void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
107// CHECK64-NEXT: ret void
108// CHECK64: }
109
110// Thunk for calling the 3rd virtual function in C, taking an int parameter, returning a struct.
111// CHECK32-LABEL: define linkonce_odr x86_thiscallcc void @"\01??_9C@@$B7AE"(%struct.C* %this, ...)
112// CHECK32: #[[ATTR]] comdat
113// CHECK32: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 2
114// CHECK32: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
115// CHECK32: musttail call x86_thiscallcc void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
116// CHECK32-NEXT: ret void
117// CHECK32: }
118//
119// CHECK64-LABEL: define linkonce_odr void @"\01??_9C@@$BBA@AA"(%struct.C* %this, ...)
120// CHECK64: #[[ATTR]] comdat
121// CHECK64: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 2
122// CHECK64: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
123// CHECK64: musttail call void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
124// CHECK64-NEXT: ret void
125// CHECK64: }
126
127// Thunk for calling the virtual function in internal class D.
128// CHECK32-LABEL: define internal x86_thiscallcc void @"\01??_9D@?A@@$BA@AE"(%"struct.(anonymous namespace)::D"* %this, ...)
129// CHECK32: #[[ATTR]]
130// CHECK32: [[VPTR:%.*]] = getelementptr inbounds void (%"struct.(anonymous namespace)::D"*, ...)*, void (%"struct.(anonymous namespace)::D"*, ...)** %{{.*}}, i64 0
131// CHECK32: [[CALLEE:%.*]] = load void (%"struct.(anonymous namespace)::D"*, ...)*, void (%"struct.(anonymous namespace)::D"*, ...)** [[VPTR]]
132// CHECK32: musttail call x86_thiscallcc void (%"struct.(anonymous namespace)::D"*, ...) [[CALLEE]](%"struct.(anonymous namespace)::D"* %{{.*}}, ...)
133// CHECK32-NEXT: ret void
134// CHECK32: }
135//
136// CHECK64-LABEL: define internal void @"\01??_9D@?A@@$BA@AA"(%"struct.(anonymous namespace)::D"* %this, ...)
137// CHECK64: #[[ATTR]]
138// CHECK64: [[VPTR:%.*]] = getelementptr inbounds void (%"struct.(anonymous namespace)::D"*, ...)*, void (%"struct.(anonymous namespace)::D"*, ...)** %{{.*}}, i64 0
139// CHECK64: [[CALLEE:%.*]] = load void (%"struct.(anonymous namespace)::D"*, ...)*, void (%"struct.(anonymous namespace)::D"*, ...)** [[VPTR]]
140// CHECK64: musttail call void (%"struct.(anonymous namespace)::D"*, ...) [[CALLEE]](%"struct.(anonymous namespace)::D"* %{{.*}}, ...)
141// CHECK64-NEXT: ret void
142// CHECK64: }
143
144// Thunk for calling the fourth virtual function in C, taking a struct parameter
145// and returning a struct.
146// CHECK32-LABEL: define linkonce_odr x86_thiscallcc void @"\01??_9C@@$BM@AE"(%struct.C* %this, ...) {{.*}} comdat
147// CHECK32: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 3
148// CHECK32: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
149// CHECK32: musttail call x86_thiscallcc void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
150// CHECK32-NEXT: ret void
151// CHECK32: }
152//
153// CHECK64-LABEL: define linkonce_odr void @"\01??_9C@@$BBI@AA"(%struct.C* %this, ...) {{.*}} comdat
154// CHECK64: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 3
155// CHECK64: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
156// CHECK64: musttail call void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
157// CHECK64: ret void
158// CHECK64: }
159
160// Thunk for calling the fifth virtual function in C which uses the __cdecl calling convention.
161// CHECK32-LABEL: define linkonce_odr void @"\01??_9C@@$BBA@AA"(%struct.C* %this, ...) {{.*}} comdat align 2 {
162// CHECK32: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 4
163// CHECK32: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
164// CHECK32: musttail call void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
165// CHECK32: ret void
166// CHECK32: }
167//
168// CHECK64-LABEL: define linkonce_odr void @"\01??_9C@@$BCA@AA"(%struct.C* %this, ...) {{.*}} comdat align 2 {
169// CHECK64: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 4
170// CHECK64: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
171// CHECK64: musttail call void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
172// CHECK64: ret void
173// CHECK64: }
174
175// CHECK32: define linkonce_odr x86_thiscallcc void @"\01??_9C@@$BBE@AE"(%struct.C* %this, ...) {{.*}} comdat align 2 {
176// CHECK32: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 5
177// CHECK32: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
178// CHECK32: musttail call x86_thiscallcc void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
179// CHECK32: ret void
180// CHECK32: }
181
182// CHECK64: define linkonce_odr void @"\01??_9C@@$BCI@AA"(%struct.C* %this, ...) {{.*}} comdat align 2 {
183// CHECK64: [[VPTR:%.*]] = getelementptr inbounds void (%struct.C*, ...)*, void (%struct.C*, ...)** %{{.*}}, i64 5
184// CHECK64: [[CALLEE:%.*]] = load void (%struct.C*, ...)*, void (%struct.C*, ...)** [[VPTR]]
185// CHECK64: musttail call void (%struct.C*, ...) [[CALLEE]](%struct.C* %{{.*}}, ...)
186// CHECK64: ret void
187// CHECK64: }
188
189// CHECK32: #[[ATTR]] = {{{.*}}"thunk"{{.*}}}
190