1// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -emit-llvm -o - -mconstructor-aliases -fcxx-exceptions -fexceptions | FileCheck %s
2
3// CHECK: @_ZN5test01AD1Ev = alias {{.*}} @_ZN5test01AD2Ev
4// CHECK: @_ZN5test11MD2Ev = alias {{.*}} @_ZN5test11AD2Ev
5// CHECK: @_ZN5test11ND2Ev = alias {{.*}} @_ZN5test11AD2Ev
6// CHECK: @_ZN5test11OD2Ev = alias {{.*}} @_ZN5test11AD2Ev
7// CHECK: @_ZN5test11SD2Ev = alias bitcast {{.*}} @_ZN5test11AD2Ev
8
9// CHECK: @_ZN5test312_GLOBAL__N_11DD1Ev = alias internal {{.*}} @_ZN5test312_GLOBAL__N_11DD2Ev
10// CHECK: @_ZN5test312_GLOBAL__N_11DD2Ev = alias internal bitcast {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
11// CHECK: @_ZN5test312_GLOBAL__N_11CD1Ev = alias internal {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
12
13struct A {
14  int a;
15
16  ~A();
17};
18
19// Base with non-trivial destructor
20struct B : A {
21  ~B();
22};
23
24B::~B() { }
25
26// Field with non-trivial destructor
27struct C {
28  A a;
29
30  ~C();
31};
32
33C::~C() { }
34
35namespace PR7526 {
36  extern void foo();
37  struct allocator {
38    ~allocator() throw();
39  };
40
41  struct allocator_derived : allocator { };
42
43  // CHECK: define void @_ZN6PR75269allocatorD2Ev(%"struct.PR7526::allocator"* %this) unnamed_addr
44  // CHECK: call void @__cxa_call_unexpected
45  allocator::~allocator() throw() { foo(); }
46
47  // CHECK: define linkonce_odr void @_ZN6PR752617allocator_derivedD1Ev(%"struct.PR7526::allocator_derived"* %this) unnamed_addr
48  // CHECK-NOT: call void @__cxa_call_unexpected
49  // CHECK:     }
50  void foo() {
51    allocator_derived ad;
52  }
53}
54
55// PR5084
56template<typename T>
57class A1 {
58  ~A1();
59};
60
61template<> A1<char>::~A1();
62
63// PR5529
64namespace PR5529 {
65  struct A {
66    ~A();
67  };
68
69  A::~A() { }
70  struct B : A {
71    virtual ~B();
72  };
73
74  B::~B()  {}
75}
76
77// FIXME: there's a known problem in the codegen here where, if one
78// destructor throws, the remaining destructors aren't run.  Fix it,
79// then make this code check for it.
80namespace test0 {
81  void foo();
82  struct VBase { ~VBase(); };
83  struct Base { ~Base(); };
84  struct Member { ~Member(); };
85
86  struct A : Base {
87    Member M;
88    ~A();
89  };
90
91  // The function-try-block won't suppress -mconstructor-aliases here.
92  A::~A() try { } catch (int i) {}
93
94// complete destructor alias tested above
95
96// CHECK: define void @_ZN5test01AD2Ev(%"struct.test0::A"* %this) unnamed_addr
97// CHECK: invoke void @_ZN5test06MemberD1Ev
98// CHECK:   unwind label [[MEM_UNWIND:%[a-zA-Z0-9.]+]]
99// CHECK: invoke void @_ZN5test04BaseD2Ev
100// CHECK:   unwind label [[BASE_UNWIND:%[a-zA-Z0-9.]+]]
101
102  struct B : Base, virtual VBase {
103    Member M;
104    ~B();
105  };
106  B::~B() try { } catch (int i) {}
107  // It will suppress the delegation optimization here, though.
108
109// CHECK: define void @_ZN5test01BD1Ev(%"struct.test0::B"* %this) unnamed_addr
110// CHECK: invoke void @_ZN5test06MemberD1Ev
111// CHECK:   unwind label [[MEM_UNWIND:%[a-zA-Z0-9.]+]]
112// CHECK: invoke void @_ZN5test04BaseD2Ev
113// CHECK:   unwind label [[BASE_UNWIND:%[a-zA-Z0-9.]+]]
114// CHECK: invoke void @_ZN5test05VBaseD2Ev
115// CHECK:   unwind label [[VBASE_UNWIND:%[a-zA-Z0-9.]+]]
116
117// CHECK: define void @_ZN5test01BD2Ev(%"struct.test0::B"* %this, i8** %vtt) unnamed_addr
118// CHECK: invoke void @_ZN5test06MemberD1Ev
119// CHECK:   unwind label [[MEM_UNWIND:%[a-zA-Z0-9.]+]]
120// CHECK: invoke void @_ZN5test04BaseD2Ev
121// CHECK:   unwind label [[BASE_UNWIND:%[a-zA-Z0-9.]+]]
122}
123
124// Test base-class aliasing.
125namespace test1 {
126  struct A { ~A(); char ***m; }; // non-trivial destructor
127  struct B { ~B(); }; // non-trivial destructor
128  struct Empty { }; // trivial destructor, empty
129  struct NonEmpty { int x; }; // trivial destructor, non-empty
130
131  // There must be a definition in this translation unit for the alias
132  // optimization to apply.
133  A::~A() { delete m; }
134
135  struct M : A { ~M(); };
136  M::~M() {} // alias tested above
137
138  struct N : A, Empty { ~N(); };
139  N::~N() {} // alias tested above
140
141  struct O : Empty, A { ~O(); };
142  O::~O() {} // alias tested above
143
144  struct P : NonEmpty, A { ~P(); };
145  P::~P() {} // CHECK: define void @_ZN5test11PD2Ev(%"struct.test1::P"* %this) unnamed_addr
146
147  struct Q : A, B { ~Q(); };
148  Q::~Q() {} // CHECK: define void @_ZN5test11QD2Ev(%"struct.test1::Q"* %this) unnamed_addr
149
150  struct R : A { ~R(); };
151  R::~R() { A a; } // CHECK: define void @_ZN5test11RD2Ev(%"struct.test1::R"* %this) unnamed_addr
152
153  struct S : A { ~S(); int x; };
154  S::~S() {} // alias tested above
155
156  struct T : A { ~T(); B x; };
157  T::~T() {} // CHECK: 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() {} // CHECK: 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  // CHECK: define void @_ZN5test21BD2Ev(%"struct.test2::B"* %this) unnamed_addr
172  // CHECK: 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  // Checked at top of file:
189  // @_ZN5test312_GLOBAL__N_11CD1Ev = alias internal {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
190
191  // More checks at end of file.
192
193}
194
195namespace test4 {
196  struct A { ~A(); };
197
198  // CHECK: define void @_ZN5test43fooEv()
199  // CHECK: call void @_ZN5test41AD1Ev
200  // CHECK: ret void
201  void foo() {
202    {
203      A a;
204      goto failure;
205    }
206
207  failure:
208    return;
209  }
210
211  // CHECK: define void @_ZN5test43barEi(
212  // CHECK:      [[X:%.*]] = alloca i32
213  // CHECK-NEXT: [[A:%.*]] = alloca
214  // CHECK:      br label
215  // CHECK:      [[TMP:%.*]] = load i32* [[X]]
216  // CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP]], 0
217  // CHECK-NEXT: br i1
218  // CHECK:      call void @_ZN5test41AD1Ev(
219  // CHECK:      br label
220  // CHECK:      [[TMP:%.*]] = load i32* [[X]]
221  // CHECK:      [[TMP2:%.*]] = add nsw i32 [[TMP]], -1
222  // CHECK:      store i32 [[TMP2]], i32* [[X]]
223  // CHECK:      br label
224  // CHECK:      ret void
225  void bar(int x) {
226    for (A a; x; ) {
227      x--;
228    }
229  }
230}
231
232// PR7575
233namespace test5 {
234  struct A { ~A(); };
235
236  // CHECK: define void @_ZN5test53fooEv()
237  // CHECK:      [[ELEMS:%.*]] = alloca [5 x [[A:%.*]]], align
238  // CHECK-NEXT: [[EXN:%.*]] = alloca i8*
239  // CHECK-NEXT: [[SEL:%.*]] = alloca i32
240  // CHECK-NEXT: [[BEGIN:%.*]] = getelementptr inbounds [5 x [[A]]]* [[ELEMS]], i32 0, i32 0
241  // CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 5
242  // CHECK-NEXT: br label
243  // CHECK:      [[POST:%.*]] = phi [[A]]* [ [[END]], {{%.*}} ], [ [[ELT:%.*]], {{%.*}} ]
244  // CHECK-NEXT: [[ELT]] = getelementptr inbounds [[A]]* [[POST]], i64 -1
245  // CHECK-NEXT: invoke void @_ZN5test51AD1Ev([[A]]* [[ELT]])
246  // CHECK:      [[T0:%.*]] = icmp eq [[A]]* [[ELT]], [[BEGIN]]
247  // CHECK-NEXT: br i1 [[T0]],
248  // CHECK:      ret void
249  // lpad
250  // CHECK:      [[EMPTY:%.*]] = icmp eq [[A]]* [[BEGIN]], [[ELT]]
251  // CHECK-NEXT: br i1 [[EMPTY]]
252  // CHECK:      [[AFTER:%.*]] = phi [[A]]* [ [[ELT]], {{%.*}} ], [ [[CUR:%.*]], {{%.*}} ]
253  // CHECK-NEXT: [[CUR:%.*]] = getelementptr inbounds [[A]]* [[AFTER]], i64 -1
254  // CHECK-NEXT: invoke void @_ZN5test51AD1Ev([[A]]* [[CUR]])
255  // CHECK:      [[DONE:%.*]] = icmp eq [[A]]* [[CUR]], [[BEGIN]]
256  // CHECK-NEXT: br i1 [[DONE]],
257  void foo() {
258    A elems[5];
259  }
260}
261
262namespace test6 {
263  void opaque();
264
265  struct A { ~A(); };
266  template <unsigned> struct B { B(); ~B(); int _; };
267  struct C : B<0>, B<1>, virtual B<2>, virtual B<3> {
268    A x, y, z;
269
270    C();
271    ~C();
272  };
273
274  C::C() { opaque(); }
275  // CHECK: define void @_ZN5test61CC1Ev(%"struct.test6::C"* %this) unnamed_addr
276  // CHECK:   call void @_ZN5test61BILj2EEC2Ev
277  // CHECK:   invoke void @_ZN5test61BILj3EEC2Ev
278  // CHECK:   invoke void @_ZN5test61BILj0EEC2Ev
279  // CHECK:   invoke void @_ZN5test61BILj1EEC2Ev
280  // CHECK:   invoke void @_ZN5test66opaqueEv
281  // CHECK:   ret void
282  // FIXME: way too much EH cleanup code follows
283
284  C::~C() { opaque(); }
285  // CHECK: define void @_ZN5test61CD1Ev(%"struct.test6::C"* %this) unnamed_addr
286  // CHECK:   invoke void @_ZN5test61CD2Ev
287  // CHECK:   invoke void @_ZN5test61BILj3EED2Ev
288  // CHECK:   call void @_ZN5test61BILj2EED2Ev
289  // CHECK:   ret void
290  // CHECK:   invoke void @_ZN5test61BILj3EED2Ev
291  // CHECK:   invoke void @_ZN5test61BILj2EED2Ev
292
293  // CHECK: define void @_ZN5test61CD2Ev(%"struct.test6::C"* %this, i8** %vtt) unnamed_addr
294  // CHECK:   invoke void @_ZN5test66opaqueEv
295  // CHECK:   invoke void @_ZN5test61AD1Ev
296  // CHECK:   invoke void @_ZN5test61AD1Ev
297  // CHECK:   invoke void @_ZN5test61AD1Ev
298  // CHECK:   invoke void @_ZN5test61BILj1EED2Ev
299  // CHECK:   call void @_ZN5test61BILj0EED2Ev
300  // CHECK:   ret void
301  // CHECK:   invoke void @_ZN5test61AD1Ev
302  // CHECK:   invoke void @_ZN5test61AD1Ev
303  // CHECK:   invoke void @_ZN5test61AD1Ev
304  // CHECK:   invoke void @_ZN5test61BILj1EED2Ev
305  // CHECK:   invoke void @_ZN5test61BILj0EED2Ev
306}
307
308// PR 9197
309namespace test7 {
310  struct D { ~D(); };
311
312  struct A { ~A(); };
313  A::~A() { }
314
315  struct B : public A {
316    ~B();
317    D arr[1];
318  };
319
320  // Verify that this doesn't get emitted as an alias
321  // CHECK: define void @_ZN5test71BD2Ev(
322  // CHECK:   invoke void @_ZN5test71DD1Ev(
323  // CHECK:   call void @_ZN5test71AD2Ev(
324  B::~B() {}
325}
326
327// PR10467
328namespace test8 {
329  struct A { A(); ~A(); };
330
331  void die() __attribute__((noreturn));
332  void test() {
333    A x;
334    while (1) {
335      A y;
336      goto l;
337    }
338  l: die();
339  }
340
341  // CHECK:    define void @_ZN5test84testEv()
342  // CHECK:      [[X:%.*]] = alloca [[A:%.*]], align 1
343  // CHECK-NEXT: [[Y:%.*]] = alloca [[A:%.*]], align 1
344  // CHECK:      call void @_ZN5test81AC1Ev([[A]]* [[X]])
345  // CHECK-NEXT: br label
346  // CHECK:      invoke void @_ZN5test81AC1Ev([[A]]* [[Y]])
347  // CHECK:      invoke void @_ZN5test81AD1Ev([[A]]* [[Y]])
348  // CHECK-NOT:  switch
349  // CHECK:      invoke void @_ZN5test83dieEv()
350  // CHECK:      unreachable
351}
352
353// Checks from test3:
354
355  // CHECK: define internal void @_ZN5test312_GLOBAL__N_11DD0Ev(%"struct.test3::<anonymous namespace>::D"* %this) unnamed_addr
356  // CHECK: invoke void @_ZN5test312_GLOBAL__N_11DD1Ev(
357  // CHECK: call void @_ZdlPv({{.*}}) nounwind
358  // CHECK: ret void
359  // CHECK: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
360  // CHECK-NEXT: cleanup
361  // CHECK: call void @_ZdlPv({{.*}}) nounwind
362  // CHECK: resume { i8*, i32 }
363
364  // Checked at top of file:
365  // @_ZN5test312_GLOBAL__N_11DD1Ev = alias internal {{.*}} @_ZN5test312_GLOBAL__N_11DD2Ev
366  // @_ZN5test312_GLOBAL__N_11DD2Ev = alias internal bitcast {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
367
368  // CHECK: define internal void @_ZThn8_N5test312_GLOBAL__N_11DD1Ev(
369  // CHECK: getelementptr inbounds i8* {{.*}}, i64 -8
370  // CHECK: call void @_ZN5test312_GLOBAL__N_11DD1Ev(
371  // CHECK: ret void
372
373  // CHECK: define internal void @_ZThn8_N5test312_GLOBAL__N_11DD0Ev(
374  // CHECK: getelementptr inbounds i8* {{.*}}, i64 -8
375  // CHECK: call void @_ZN5test312_GLOBAL__N_11DD0Ev(
376  // CHECK: ret void
377
378  // CHECK: define internal void @_ZN5test312_GLOBAL__N_11CD2Ev(%"struct.test3::<anonymous namespace>::C"* %this) unnamed_addr
379  // CHECK: invoke void @_ZN5test31BD2Ev(
380  // CHECK: call void @_ZN5test31AD2Ev(
381  // CHECK: ret void
382
383  // CHECK: declare void @_ZN5test31BD2Ev(
384  // CHECK: declare void @_ZN5test31AD2Ev(
385
386  // CHECK: define internal void @_ZN5test312_GLOBAL__N_11CD0Ev(%"struct.test3::<anonymous namespace>::C"* %this) unnamed_addr
387  // CHECK: invoke void @_ZN5test312_GLOBAL__N_11CD1Ev(
388  // CHECK: call void @_ZdlPv({{.*}}) nounwind
389  // CHECK: ret void
390  // CHECK: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
391  // CHECK-NEXT: cleanup
392  // CHECK: call void @_ZdlPv({{.*}}) nounwind
393  // CHECK: resume { i8*, i32 }
394
395  // CHECK: define internal void @_ZThn8_N5test312_GLOBAL__N_11CD1Ev(
396  // CHECK: getelementptr inbounds i8* {{.*}}, i64 -8
397  // CHECK: call void @_ZN5test312_GLOBAL__N_11CD1Ev(
398  // CHECK: ret void
399
400  // CHECK: define internal void @_ZThn8_N5test312_GLOBAL__N_11CD0Ev(
401  // CHECK: getelementptr inbounds i8* {{.*}}, i64 -8
402  // CHECK: call void @_ZN5test312_GLOBAL__N_11CD0Ev(
403  // CHECK: ret void
404