1// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -emit-llvm -o - -mconstructor-aliases -fcxx-exceptions -fexceptions -O1 -disable-llvm-optzns > %t
2// RUN: FileCheck --check-prefix=CHECK1 --input-file=%t %s
3// RUN: FileCheck --check-prefix=CHECK2 --input-file=%t %s
4// RUN: FileCheck --check-prefix=CHECK3 --input-file=%t %s
5// RUN: FileCheck --check-prefix=CHECK4 --input-file=%t %s
6// RUN: FileCheck --check-prefix=CHECK5 --input-file=%t %s
7
8struct A {
9  int a;
10
11  ~A();
12};
13
14// Base with non-trivial destructor
15struct B : A {
16  ~B();
17};
18
19B::~B() { }
20
21// Field with non-trivial destructor
22struct C {
23  A a;
24
25  ~C();
26};
27
28C::~C() { }
29
30namespace PR7526 {
31  extern void foo();
32  struct allocator {
33    ~allocator() throw();
34  };
35
36  struct allocator_derived : allocator { };
37
38  // CHECK1-LABEL: define void @_ZN6PR75263fooEv()
39  // CHECK1: call void {{.*}} @_ZN6PR75269allocatorD2Ev
40
41  // CHECK1-LABEL: define void @_ZN6PR75269allocatorD2Ev(%"struct.PR7526::allocator"* %this) unnamed_addr
42  // CHECK1: call void @__cxa_call_unexpected
43  allocator::~allocator() throw() { foo(); }
44
45  void foo() {
46    allocator_derived ad;
47  }
48}
49
50// PR5084
51template<typename T>
52class A1 {
53  ~A1();
54};
55
56template<> A1<char>::~A1();
57
58// PR5529
59namespace PR5529 {
60  struct A {
61    ~A();
62  };
63
64  A::~A() { }
65  struct B : A {
66    virtual ~B();
67  };
68
69  B::~B()  {}
70}
71
72// FIXME: there's a known problem in the codegen here where, if one
73// destructor throws, the remaining destructors aren't run.  Fix it,
74// then make this code check for it.
75namespace test0 {
76  void foo();
77  struct VBase { ~VBase(); };
78  struct Base { ~Base(); };
79  struct Member { ~Member(); };
80
81  struct A : Base {
82    Member M;
83    ~A();
84  };
85
86  // The function-try-block won't suppress -mconstructor-aliases here.
87  A::~A() try { } catch (int i) {}
88
89// complete destructor alias tested above
90
91// CHECK2-LABEL: @_ZN5test01AD1Ev = alias {{.*}} @_ZN5test01AD2Ev
92// CHECK2-LABEL: define void @_ZN5test01AD2Ev(%"struct.test0::A"* %this) unnamed_addr
93// CHECK2: invoke void @_ZN5test06MemberD1Ev
94// CHECK2:   unwind label [[MEM_UNWIND:%[a-zA-Z0-9.]+]]
95// CHECK2: invoke void @_ZN5test04BaseD2Ev
96// CHECK2:   unwind label [[BASE_UNWIND:%[a-zA-Z0-9.]+]]
97
98  struct B : Base, virtual VBase {
99    Member M;
100    ~B();
101  };
102  B::~B() try { } catch (int i) {}
103  // It will suppress the delegation optimization here, though.
104
105// CHECK2-LABEL: define void @_ZN5test01BD2Ev(%"struct.test0::B"* %this, i8** %vtt) unnamed_addr
106// CHECK2: invoke void @_ZN5test06MemberD1Ev
107// CHECK2:   unwind label [[MEM_UNWIND:%[a-zA-Z0-9.]+]]
108// CHECK2: invoke void @_ZN5test04BaseD2Ev
109// CHECK2:   unwind label [[BASE_UNWIND:%[a-zA-Z0-9.]+]]
110
111// CHECK2-LABEL: define void @_ZN5test01BD1Ev(%"struct.test0::B"* %this) unnamed_addr
112// CHECK2: invoke void @_ZN5test06MemberD1Ev
113// CHECK2:   unwind label [[MEM_UNWIND:%[a-zA-Z0-9.]+]]
114// CHECK2: invoke void @_ZN5test04BaseD2Ev
115// CHECK2:   unwind label [[BASE_UNWIND:%[a-zA-Z0-9.]+]]
116// CHECK2: invoke void @_ZN5test05VBaseD2Ev
117// CHECK2:   unwind label [[VBASE_UNWIND:%[a-zA-Z0-9.]+]]
118}
119
120// Test base-class aliasing.
121namespace test1 {
122  struct A { ~A(); char ***m; }; // non-trivial destructor
123  struct B { ~B(); }; // non-trivial destructor
124  struct Empty { }; // trivial destructor, empty
125  struct NonEmpty { int x; }; // trivial destructor, non-empty
126
127  // There must be a definition in this translation unit for the alias
128  // optimization to apply.
129  A::~A() { delete m; }
130
131  struct M : A { ~M(); };
132  M::~M() {}
133  // CHECK3: @_ZN5test11MD2Ev = alias {{.*}} @_ZN5test11AD2Ev
134
135  struct N : A, Empty { ~N(); };
136  N::~N() {}
137  // CHECK3: @_ZN5test11ND2Ev = alias {{.*}} @_ZN5test11AD2Ev
138
139  struct O : Empty, A { ~O(); };
140  O::~O() {}
141  // CHECK3: @_ZN5test11OD2Ev = alias {{.*}} @_ZN5test11AD2Ev
142
143  struct P : NonEmpty, A { ~P(); };
144  P::~P() {} // CHECK3-LABEL: define void @_ZN5test11PD2Ev(%"struct.test1::P"* %this) unnamed_addr
145
146  struct Q : A, B { ~Q(); };
147  Q::~Q() {} // CHECK3-LABEL: define void @_ZN5test11QD2Ev(%"struct.test1::Q"* %this) unnamed_addr
148
149  struct R : A { ~R(); };
150  R::~R() { A a; } // CHECK3-LABEL: define void @_ZN5test11RD2Ev(%"struct.test1::R"* %this) unnamed_addr
151
152  struct S : A { ~S(); int x; };
153  S::~S() {}
154  // CHECK4: @_ZN5test11SD2Ev = alias bitcast {{.*}} @_ZN5test11AD2Ev
155
156  struct T : A { ~T(); B x; };
157  T::~T() {} // CHECK4-LABEL: define void @_ZN5test11TD2Ev(%"struct.test1::T"* %this) unnamed_addr
158
159  // The VTT parameter prevents this.  We could still make this work
160  // for calling conventions that are safe against extra parameters.
161  struct U : A, virtual B { ~U(); };
162  U::~U() {} // CHECK4-LABEL: define void @_ZN5test11UD2Ev(%"struct.test1::U"* %this, i8** %vtt) unnamed_addr
163}
164
165// PR6471
166namespace test2 {
167  struct A { ~A(); char ***m; };
168  struct B : A { ~B(); };
169
170  B::~B() {}
171  // CHECK4-LABEL: define void @_ZN5test21BD2Ev(%"struct.test2::B"* %this) unnamed_addr
172  // CHECK4: call void @_ZN5test21AD2Ev
173}
174
175// PR7142
176namespace test3 {
177  struct A { virtual ~A(); };
178  struct B { virtual ~B(); };
179  namespace { // internal linkage => deferred
180    struct C : A, B {}; // ~B() in D requires a this-adjustment thunk
181    struct D : C {};    // D::~D() is an alias to C::~C()
182  }
183
184  void test() {
185    new D; // Force emission of D's vtable
186  }
187
188  // CHECK4-LABEL: define internal void @_ZN5test312_GLOBAL__N_11CD2Ev(%"struct.test3::(anonymous namespace)::C"* %this) unnamed_addr
189  // CHECK4: invoke void @_ZN5test31BD2Ev(
190  // CHECK4: call void @_ZN5test31AD2Ev(
191  // CHECK4: ret void
192
193  // CHECK4-LABEL: define internal void @_ZN5test312_GLOBAL__N_11DD0Ev(%"struct.test3::(anonymous namespace)::D"* %this) unnamed_addr
194  // CHECK4: invoke void {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
195  // CHECK4: call void @_ZdlPv({{.*}}) [[NUW:#[0-9]+]]
196  // CHECK4: ret void
197  // CHECK4: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
198  // CHECK4-NEXT: cleanup
199  // CHECK4: call void @_ZdlPv({{.*}}) [[NUW]]
200  // CHECK4: resume { i8*, i32 }
201
202  // CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11DD1Ev(
203  // CHECK4: getelementptr inbounds i8, i8* {{.*}}, i64 -8
204  // CHECK4: call void {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
205  // CHECK4: ret void
206
207  // CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11DD0Ev(
208  // CHECK4: getelementptr inbounds i8, i8* {{.*}}, i64 -8
209  // CHECK4: call void @_ZN5test312_GLOBAL__N_11DD0Ev(
210  // CHECK4: ret void
211
212  // CHECK4-LABEL: define internal void @_ZN5test312_GLOBAL__N_11CD0Ev(%"struct.test3::(anonymous namespace)::C"* %this) unnamed_addr
213  // CHECK4: invoke void @_ZN5test312_GLOBAL__N_11CD2Ev(
214  // CHECK4: call void @_ZdlPv({{.*}}) [[NUW]]
215  // CHECK4: ret void
216  // CHECK4: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
217  // CHECK4-NEXT: cleanup
218  // CHECK4: call void @_ZdlPv({{.*}}) [[NUW]]
219  // CHECK4: resume { i8*, i32 }
220
221  // CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11CD1Ev(
222  // CHECK4: getelementptr inbounds i8, i8* {{.*}}, i64 -8
223  // CHECK4: call void @_ZN5test312_GLOBAL__N_11CD2Ev(
224  // CHECK4: ret void
225
226  // CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11CD0Ev(
227  // CHECK4: getelementptr inbounds i8, i8* {{.*}}, i64 -8
228  // CHECK4: call void @_ZN5test312_GLOBAL__N_11CD0Ev(
229  // CHECK4: ret void
230
231  // CHECK4-LABEL: declare void @_ZN5test31BD2Ev(
232  // CHECK4-LABEL: declare void @_ZN5test31AD2Ev(
233
234  // CHECK4: attributes [[NUW]] = {{[{].*}} nounwind {{.*[}]}}
235}
236
237namespace test4 {
238  struct A { ~A(); };
239
240  // CHECK5-LABEL: define void @_ZN5test43fooEv()
241  // CHECK5: call void @_ZN5test41AD1Ev
242  // CHECK5: ret void
243  void foo() {
244    {
245      A a;
246      goto failure;
247    }
248
249  failure:
250    return;
251  }
252
253  // CHECK5-LABEL: define void @_ZN5test43barEi(
254  // CHECK5:      [[X:%.*]] = alloca i32
255  // CHECK5-NEXT: [[A:%.*]] = alloca
256  // CHECK5:      br label
257  // CHECK5:      [[TMP:%.*]] = load i32, i32* [[X]]
258  // CHECK5-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP]], 0
259  // CHECK5-NEXT: br i1
260  // CHECK5:      call void @_ZN5test41AD1Ev(
261  // CHECK5:      br label
262  // CHECK5:      [[TMP:%.*]] = load i32, i32* [[X]]
263  // CHECK5:      [[TMP2:%.*]] = add nsw i32 [[TMP]], -1
264  // CHECK5:      store i32 [[TMP2]], i32* [[X]]
265  // CHECK5:      br label
266  // CHECK5:      ret void
267  void bar(int x) {
268    for (A a; x; ) {
269      x--;
270    }
271  }
272}
273
274// PR7575
275namespace test5 {
276  struct A { ~A(); };
277
278  // CHECK5-LABEL: define void @_ZN5test53fooEv()
279  // CHECK5:      [[ELEMS:%.*]] = alloca [5 x [[A:%.*]]], align
280  // CHECK5-NEXT: [[EXN:%.*]] = alloca i8*
281  // CHECK5-NEXT: [[SEL:%.*]] = alloca i32
282  // CHECK5-NEXT: [[BEGIN:%.*]] = getelementptr inbounds [5 x [[A]]], [5 x [[A]]]* [[ELEMS]], i32 0, i32 0
283  // CHECK5-NEXT: [[END:%.*]] = getelementptr inbounds [[A]], [[A]]* [[BEGIN]], i64 5
284  // CHECK5-NEXT: br label
285  // CHECK5:      [[POST:%.*]] = phi [[A]]* [ [[END]], {{%.*}} ], [ [[ELT:%.*]], {{%.*}} ]
286  // CHECK5-NEXT: [[ELT]] = getelementptr inbounds [[A]], [[A]]* [[POST]], i64 -1
287  // CHECK5-NEXT: invoke void @_ZN5test51AD1Ev([[A]]* [[ELT]])
288  // CHECK5:      [[T0:%.*]] = icmp eq [[A]]* [[ELT]], [[BEGIN]]
289  // CHECK5-NEXT: br i1 [[T0]],
290  // CHECK5:      ret void
291  // lpad
292  // CHECK5:      [[EMPTY:%.*]] = icmp eq [[A]]* [[BEGIN]], [[ELT]]
293  // CHECK5-NEXT: br i1 [[EMPTY]]
294  // CHECK5:      [[AFTER:%.*]] = phi [[A]]* [ [[ELT]], {{%.*}} ], [ [[CUR:%.*]], {{%.*}} ]
295  // CHECK5-NEXT: [[CUR:%.*]] = getelementptr inbounds [[A]], [[A]]* [[AFTER]], i64 -1
296  // CHECK5-NEXT: invoke void @_ZN5test51AD1Ev([[A]]* [[CUR]])
297  // CHECK5:      [[DONE:%.*]] = icmp eq [[A]]* [[CUR]], [[BEGIN]]
298  // CHECK5-NEXT: br i1 [[DONE]],
299  void foo() {
300    A elems[5];
301  }
302}
303
304namespace test6 {
305  void opaque();
306
307  struct A { ~A(); };
308  template <unsigned> struct B { B(); ~B(); int _; };
309  struct C : B<0>, B<1>, virtual B<2>, virtual B<3> {
310    A x, y, z;
311
312    C();
313    ~C();
314  };
315
316  C::C() { opaque(); }
317  // CHECK5-LABEL: define void @_ZN5test61CC1Ev(%"struct.test6::C"* %this) unnamed_addr
318  // CHECK5:   call void @_ZN5test61BILj2EEC2Ev
319  // CHECK5:   invoke void @_ZN5test61BILj3EEC2Ev
320  // CHECK5:   invoke void @_ZN5test61BILj0EEC2Ev
321  // CHECK5:   invoke void @_ZN5test61BILj1EEC2Ev
322  // CHECK5:   invoke void @_ZN5test66opaqueEv
323  // CHECK5:   ret void
324  // FIXME: way too much EH cleanup code follows
325
326  C::~C() { opaque(); }
327  // CHECK5-LABEL: define void @_ZN5test61CD2Ev(%"struct.test6::C"* %this, i8** %vtt) unnamed_addr
328  // CHECK5:   invoke void @_ZN5test66opaqueEv
329  // CHECK5:   invoke void @_ZN5test61AD1Ev
330  // CHECK5:   invoke void @_ZN5test61AD1Ev
331  // CHECK5:   invoke void @_ZN5test61AD1Ev
332  // CHECK5:   invoke void @_ZN5test61BILj1EED2Ev
333  // CHECK5:   call void @_ZN5test61BILj0EED2Ev
334  // CHECK5:   ret void
335  // CHECK5:   invoke void @_ZN5test61AD1Ev
336  // CHECK5:   invoke void @_ZN5test61AD1Ev
337  // CHECK5:   invoke void @_ZN5test61AD1Ev
338  // CHECK5:   invoke void @_ZN5test61BILj1EED2Ev
339  // CHECK5:   invoke void @_ZN5test61BILj0EED2Ev
340
341  // CHECK5-LABEL: define void @_ZN5test61CD1Ev(%"struct.test6::C"* %this) unnamed_addr
342  // CHECK5:   invoke void @_ZN5test61CD2Ev
343  // CHECK5:   invoke void @_ZN5test61BILj3EED2Ev
344  // CHECK5:   call void @_ZN5test61BILj2EED2Ev
345  // CHECK5:   ret void
346  // CHECK5:   invoke void @_ZN5test61BILj3EED2Ev
347  // CHECK5:   invoke void @_ZN5test61BILj2EED2Ev
348}
349
350// PR 9197
351namespace test7 {
352  struct D { ~D(); };
353
354  struct A { ~A(); };
355  A::~A() { }
356
357  struct B : public A {
358    ~B();
359    D arr[1];
360  };
361
362  // Verify that this doesn't get emitted as an alias
363  // CHECK5-LABEL: define void @_ZN5test71BD2Ev(
364  // CHECK5:   invoke void @_ZN5test71DD1Ev(
365  // CHECK5:   call void @_ZN5test71AD2Ev(
366  B::~B() {}
367}
368
369// PR10467
370namespace test8 {
371  struct A { A(); ~A(); };
372
373  void die() __attribute__((noreturn));
374  void test() {
375    A x;
376    while (1) {
377      A y;
378      goto l;
379    }
380  l: die();
381  }
382
383  // CHECK5-LABEL:    define void @_ZN5test84testEv()
384  // CHECK5:      [[X:%.*]] = alloca [[A:%.*]], align 1
385  // CHECK5-NEXT: [[Y:%.*]] = alloca [[A:%.*]], align 1
386  // CHECK5:      call void @_ZN5test81AC1Ev([[A]]* [[X]])
387  // CHECK5-NEXT: br label
388  // CHECK5:      invoke void @_ZN5test81AC1Ev([[A]]* [[Y]])
389  // CHECK5:      invoke void @_ZN5test81AD1Ev([[A]]* [[Y]])
390  // CHECK5-NOT:  switch
391  // CHECK5:      invoke void @_ZN5test83dieEv()
392  // CHECK5:      unreachable
393}
394
395// PR12710
396namespace test9 {
397  struct ArgType {
398    ~ArgType();
399  };
400  template<typename T>
401  void f1(const ArgType& = ArgType());
402  void f2();
403  void bar() {
404    f1<int>();
405    f2();
406  }
407  // CHECK5: call void @_ZN5test97ArgTypeD1Ev(%"struct.test9::ArgType"* %
408  // CHECK5: call void @_ZN5test92f2Ev()
409}
410
411namespace test10 {
412  // We used to crash trying to replace _ZN6test106OptionD1Ev with
413  // _ZN6test106OptionD2Ev twice.
414  struct Option {
415    virtual ~Option() {}
416  };
417  template <class DataType> class opt : public Option {};
418  template class opt<int>;
419  // CHECK5-LABEL: define zeroext i1 @_ZN6test1016handleOccurrenceEv(
420  bool handleOccurrence() {
421    // CHECK5: call void @_ZN6test106OptionD2Ev(
422    Option x;
423    return true;
424  }
425}
426