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
8 struct A {
9 int a;
10
11 ~A();
12 };
13
14 // Base with non-trivial destructor
15 struct B : A {
16 ~B();
17 };
18
~B()19 B::~B() { }
20
21 // Field with non-trivial destructor
22 struct C {
23 A a;
24
25 ~C();
26 };
27
~C()28 C::~C() { }
29
30 namespace 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
~allocator()43 allocator::~allocator() throw() { foo(); }
44
foo()45 void foo() {
46 allocator_derived ad;
47 }
48 }
49
50 // PR5084
51 template<typename T>
52 class A1 {
53 ~A1();
54 };
55
56 template<> A1<char>::~A1();
57
58 // PR5529
59 namespace PR5529 {
60 struct A {
61 ~A();
62 };
63
~A()64 A::~A() { }
65 struct B : A {
66 virtual ~B();
67 };
68
~B()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.
75 namespace 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.
~A()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 };
~B()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.
121 namespace 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.
~A()129 A::~A() { delete m; }
130
131 struct M : A { ~M(); };
~M()132 M::~M() {}
133 // CHECK3: @_ZN5test11MD2Ev = alias {{.*}} @_ZN5test11AD2Ev
134
135 struct N : A, Empty { ~N(); };
~N()136 N::~N() {}
137 // CHECK3: @_ZN5test11ND2Ev = alias {{.*}} @_ZN5test11AD2Ev
138
139 struct O : Empty, A { ~O(); };
~O()140 O::~O() {}
141 // CHECK3: @_ZN5test11OD2Ev = alias {{.*}} @_ZN5test11AD2Ev
142
143 struct P : NonEmpty, A { ~P(); };
~P()144 P::~P() {} // CHECK3-LABEL: define void @_ZN5test11PD2Ev(%"struct.test1::P"* %this) unnamed_addr
145
146 struct Q : A, B { ~Q(); };
~Q()147 Q::~Q() {} // CHECK3-LABEL: define void @_ZN5test11QD2Ev(%"struct.test1::Q"* %this) unnamed_addr
148
149 struct R : A { ~R(); };
~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; };
~S()153 S::~S() {}
154 // CHECK4: @_ZN5test11SD2Ev = alias bitcast {{.*}} @_ZN5test11AD2Ev
155
156 struct T : A { ~T(); B x; };
~T()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(); };
~U()162 U::~U() {} // CHECK4-LABEL: define void @_ZN5test11UD2Ev(%"struct.test1::U"* %this, i8** %vtt) unnamed_addr
163 }
164
165 // PR6471
166 namespace test2 {
167 struct A { ~A(); char ***m; };
168 struct B : A { ~B(); };
169
~B()170 B::~B() {}
171 // CHECK4-LABEL: define void @_ZN5test21BD2Ev(%"struct.test2::B"* %this) unnamed_addr
172 // CHECK4: call void @_ZN5test21AD2Ev
173 }
174
175 // PR7142
176 namespace 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
test()184 void test() {
185 new D; // Force emission of D's vtable
186 }
187
188 // CHECK4-LABEL: define internal void @_ZN5test312_GLOBAL__N_11DD0Ev(%"struct.test3::(anonymous namespace)::D"* %this) unnamed_addr
189 // CHECK4: invoke void {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
190 // CHECK4: call void @_ZdlPv({{.*}}) [[NUW:#[0-9]+]]
191 // CHECK4: ret void
192 // CHECK4: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
193 // CHECK4-NEXT: cleanup
194 // CHECK4: call void @_ZdlPv({{.*}}) [[NUW]]
195 // CHECK4: resume { i8*, i32 }
196
197 // CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11DD1Ev(
198 // CHECK4: getelementptr inbounds i8* {{.*}}, i64 -8
199 // CHECK4: call void {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
200 // CHECK4: ret void
201
202 // CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11DD0Ev(
203 // CHECK4: getelementptr inbounds i8* {{.*}}, i64 -8
204 // CHECK4: call void @_ZN5test312_GLOBAL__N_11DD0Ev(
205 // CHECK4: ret void
206
207 // CHECK4-LABEL: declare void @_ZN5test31BD2Ev(
208 // CHECK4-LABEL: declare void @_ZN5test31AD2Ev(
209
210 // CHECK4-LABEL: define internal void @_ZN5test312_GLOBAL__N_11CD2Ev(%"struct.test3::(anonymous namespace)::C"* %this) unnamed_addr
211 // CHECK4: invoke void @_ZN5test31BD2Ev(
212 // CHECK4: call void @_ZN5test31AD2Ev(
213 // CHECK4: ret void
214
215
216 // CHECK4-LABEL: define internal void @_ZN5test312_GLOBAL__N_11CD0Ev(%"struct.test3::(anonymous namespace)::C"* %this) unnamed_addr
217 // CHECK4: invoke void @_ZN5test312_GLOBAL__N_11CD2Ev(
218 // CHECK4: call void @_ZdlPv({{.*}}) [[NUW]]
219 // CHECK4: ret void
220 // CHECK4: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
221 // CHECK4-NEXT: cleanup
222 // CHECK4: call void @_ZdlPv({{.*}}) [[NUW]]
223 // CHECK4: resume { i8*, i32 }
224
225 // CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11CD1Ev(
226 // CHECK4: getelementptr inbounds i8* {{.*}}, i64 -8
227 // CHECK4: call void @_ZN5test312_GLOBAL__N_11CD2Ev(
228 // CHECK4: ret void
229
230 // CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11CD0Ev(
231 // CHECK4: getelementptr inbounds i8* {{.*}}, i64 -8
232 // CHECK4: call void @_ZN5test312_GLOBAL__N_11CD0Ev(
233 // CHECK4: ret void
234
235 // CHECK4: attributes [[NUW]] = {{[{].*}} nounwind {{.*[}]}}
236 }
237
238 namespace test4 {
239 struct A { ~A(); };
240
241 // CHECK5-LABEL: define void @_ZN5test43fooEv()
242 // CHECK5: call void @_ZN5test41AD1Ev
243 // CHECK5: ret void
foo()244 void foo() {
245 {
246 A a;
247 goto failure;
248 }
249
250 failure:
251 return;
252 }
253
254 // CHECK5-LABEL: define void @_ZN5test43barEi(
255 // CHECK5: [[X:%.*]] = alloca i32
256 // CHECK5-NEXT: [[A:%.*]] = alloca
257 // CHECK5: br label
258 // CHECK5: [[TMP:%.*]] = load i32* [[X]]
259 // CHECK5-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP]], 0
260 // CHECK5-NEXT: br i1
261 // CHECK5: call void @_ZN5test41AD1Ev(
262 // CHECK5: br label
263 // CHECK5: [[TMP:%.*]] = load i32* [[X]]
264 // CHECK5: [[TMP2:%.*]] = add nsw i32 [[TMP]], -1
265 // CHECK5: store i32 [[TMP2]], i32* [[X]]
266 // CHECK5: br label
267 // CHECK5: ret void
bar(int x)268 void bar(int x) {
269 for (A a; x; ) {
270 x--;
271 }
272 }
273 }
274
275 // PR7575
276 namespace test5 {
277 struct A { ~A(); };
278
279 // CHECK5-LABEL: define void @_ZN5test53fooEv()
280 // CHECK5: [[ELEMS:%.*]] = alloca [5 x [[A:%.*]]], align
281 // CHECK5-NEXT: [[EXN:%.*]] = alloca i8*
282 // CHECK5-NEXT: [[SEL:%.*]] = alloca i32
283 // CHECK5-NEXT: [[BEGIN:%.*]] = getelementptr inbounds [5 x [[A]]]* [[ELEMS]], i32 0, i32 0
284 // CHECK5-NEXT: [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 5
285 // CHECK5-NEXT: br label
286 // CHECK5: [[POST:%.*]] = phi [[A]]* [ [[END]], {{%.*}} ], [ [[ELT:%.*]], {{%.*}} ]
287 // CHECK5-NEXT: [[ELT]] = getelementptr inbounds [[A]]* [[POST]], i64 -1
288 // CHECK5-NEXT: invoke void @_ZN5test51AD1Ev([[A]]* [[ELT]])
289 // CHECK5: [[T0:%.*]] = icmp eq [[A]]* [[ELT]], [[BEGIN]]
290 // CHECK5-NEXT: br i1 [[T0]],
291 // CHECK5: ret void
292 // lpad
293 // CHECK5: [[EMPTY:%.*]] = icmp eq [[A]]* [[BEGIN]], [[ELT]]
294 // CHECK5-NEXT: br i1 [[EMPTY]]
295 // CHECK5: [[AFTER:%.*]] = phi [[A]]* [ [[ELT]], {{%.*}} ], [ [[CUR:%.*]], {{%.*}} ]
296 // CHECK5-NEXT: [[CUR:%.*]] = getelementptr inbounds [[A]]* [[AFTER]], i64 -1
297 // CHECK5-NEXT: invoke void @_ZN5test51AD1Ev([[A]]* [[CUR]])
298 // CHECK5: [[DONE:%.*]] = icmp eq [[A]]* [[CUR]], [[BEGIN]]
299 // CHECK5-NEXT: br i1 [[DONE]],
foo()300 void foo() {
301 A elems[5];
302 }
303 }
304
305 namespace test6 {
306 void opaque();
307
308 struct A { ~A(); };
309 template <unsigned> struct B { B(); ~B(); int _; };
310 struct C : B<0>, B<1>, virtual B<2>, virtual B<3> {
311 A x, y, z;
312
313 C();
314 ~C();
315 };
316
C()317 C::C() { opaque(); }
318 // CHECK5-LABEL: define void @_ZN5test61CC1Ev(%"struct.test6::C"* %this) unnamed_addr
319 // CHECK5: call void @_ZN5test61BILj2EEC2Ev
320 // CHECK5: invoke void @_ZN5test61BILj3EEC2Ev
321 // CHECK5: invoke void @_ZN5test61BILj0EEC2Ev
322 // CHECK5: invoke void @_ZN5test61BILj1EEC2Ev
323 // CHECK5: invoke void @_ZN5test66opaqueEv
324 // CHECK5: ret void
325 // FIXME: way too much EH cleanup code follows
326
~C()327 C::~C() { opaque(); }
328 // CHECK5-LABEL: define void @_ZN5test61CD2Ev(%"struct.test6::C"* %this, i8** %vtt) unnamed_addr
329 // CHECK5: invoke void @_ZN5test66opaqueEv
330 // CHECK5: invoke void @_ZN5test61AD1Ev
331 // CHECK5: invoke void @_ZN5test61AD1Ev
332 // CHECK5: invoke void @_ZN5test61AD1Ev
333 // CHECK5: invoke void @_ZN5test61BILj1EED2Ev
334 // CHECK5: call void @_ZN5test61BILj0EED2Ev
335 // CHECK5: ret void
336 // CHECK5: invoke void @_ZN5test61AD1Ev
337 // CHECK5: invoke void @_ZN5test61AD1Ev
338 // CHECK5: invoke void @_ZN5test61AD1Ev
339 // CHECK5: invoke void @_ZN5test61BILj1EED2Ev
340 // CHECK5: invoke void @_ZN5test61BILj0EED2Ev
341
342 // CHECK5-LABEL: define void @_ZN5test61CD1Ev(%"struct.test6::C"* %this) unnamed_addr
343 // CHECK5: invoke void @_ZN5test61CD2Ev
344 // CHECK5: invoke void @_ZN5test61BILj3EED2Ev
345 // CHECK5: call void @_ZN5test61BILj2EED2Ev
346 // CHECK5: ret void
347 // CHECK5: invoke void @_ZN5test61BILj3EED2Ev
348 // CHECK5: invoke void @_ZN5test61BILj2EED2Ev
349 }
350
351 // PR 9197
352 namespace test7 {
353 struct D { ~D(); };
354
355 struct A { ~A(); };
~A()356 A::~A() { }
357
358 struct B : public A {
359 ~B();
360 D arr[1];
361 };
362
363 // Verify that this doesn't get emitted as an alias
364 // CHECK5-LABEL: define void @_ZN5test71BD2Ev(
365 // CHECK5: invoke void @_ZN5test71DD1Ev(
366 // CHECK5: call void @_ZN5test71AD2Ev(
~B()367 B::~B() {}
368 }
369
370 // PR10467
371 namespace test8 {
372 struct A { A(); ~A(); };
373
374 void die() __attribute__((noreturn));
test()375 void test() {
376 A x;
377 while (1) {
378 A y;
379 goto l;
380 }
381 l: die();
382 }
383
384 // CHECK5-LABEL: define void @_ZN5test84testEv()
385 // CHECK5: [[X:%.*]] = alloca [[A:%.*]], align 1
386 // CHECK5-NEXT: [[Y:%.*]] = alloca [[A:%.*]], align 1
387 // CHECK5: call void @_ZN5test81AC1Ev([[A]]* [[X]])
388 // CHECK5-NEXT: br label
389 // CHECK5: invoke void @_ZN5test81AC1Ev([[A]]* [[Y]])
390 // CHECK5: invoke void @_ZN5test81AD1Ev([[A]]* [[Y]])
391 // CHECK5-NOT: switch
392 // CHECK5: invoke void @_ZN5test83dieEv()
393 // CHECK5: unreachable
394 }
395
396 // PR12710
397 namespace test9 {
398 struct ArgType {
399 ~ArgType();
400 };
401 template<typename T>
402 void f1(const ArgType& = ArgType());
403 void f2();
bar()404 void bar() {
405 f1<int>();
406 f2();
407 }
408 // CHECK5: call void @_ZN5test97ArgTypeD1Ev(%"struct.test9::ArgType"* %
409 // CHECK5: call void @_ZN5test92f2Ev()
410 }
411
412 namespace test10 {
413 // We used to crash trying to replace _ZN6test106OptionD1Ev with
414 // _ZN6test106OptionD2Ev twice.
415 struct Option {
~Optiontest10::Option416 virtual ~Option() {}
417 };
418 template <class DataType> class opt : public Option {};
419 template class opt<int>;
420 // CHECK5-LABEL: define zeroext i1 @_ZN6test1016handleOccurrenceEv(
handleOccurrence()421 bool handleOccurrence() {
422 // CHECK5: call void @_ZN6test106OptionD2Ev(
423 Option x;
424 return true;
425 }
426 }
427