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
13 struct A {
14 int a;
15
16 ~A();
17 };
18
19 // Base with non-trivial destructor
20 struct B : A {
21 ~B();
22 };
23
~B()24 B::~B() { }
25
26 // Field with non-trivial destructor
27 struct C {
28 A a;
29
30 ~C();
31 };
32
~C()33 C::~C() { }
34
35 namespace 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
~allocator()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: }
foo()50 void foo() {
51 allocator_derived ad;
52 }
53 }
54
55 // PR5084
56 template<typename T>
57 class A1 {
58 ~A1();
59 };
60
61 template<> A1<char>::~A1();
62
63 // PR5529
64 namespace PR5529 {
65 struct A {
66 ~A();
67 };
68
~A()69 A::~A() { }
70 struct B : A {
71 virtual ~B();
72 };
73
~B()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.
80 namespace 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.
~A()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 };
~B()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.
125 namespace 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.
~A()133 A::~A() { delete m; }
134
135 struct M : A { ~M(); };
~M()136 M::~M() {} // alias tested above
137
138 struct N : A, Empty { ~N(); };
~N()139 N::~N() {} // alias tested above
140
141 struct O : Empty, A { ~O(); };
~O()142 O::~O() {} // alias tested above
143
144 struct P : NonEmpty, A { ~P(); };
~P()145 P::~P() {} // CHECK: define void @_ZN5test11PD2Ev(%"struct.test1::P"* %this) unnamed_addr
146
147 struct Q : A, B { ~Q(); };
~Q()148 Q::~Q() {} // CHECK: define void @_ZN5test11QD2Ev(%"struct.test1::Q"* %this) unnamed_addr
149
150 struct R : A { ~R(); };
~R()151 R::~R() { A a; } // CHECK: define void @_ZN5test11RD2Ev(%"struct.test1::R"* %this) unnamed_addr
152
153 struct S : A { ~S(); int x; };
~S()154 S::~S() {} // alias tested above
155
156 struct T : A { ~T(); B x; };
~T()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(); };
~U()162 U::~U() {} // CHECK: 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 // CHECK: define void @_ZN5test21BD2Ev(%"struct.test2::B"* %this) unnamed_addr
172 // CHECK: 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 // 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
195 namespace test4 {
196 struct A { ~A(); };
197
198 // CHECK: define void @_ZN5test43fooEv()
199 // CHECK: call void @_ZN5test41AD1Ev
200 // CHECK: ret void
foo()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
bar(int x)225 void bar(int x) {
226 for (A a; x; ) {
227 x--;
228 }
229 }
230 }
231
232 // PR7575
233 namespace 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: [[EHCLEANUP:%.*]] = alloca i32
241 // CHECK-NEXT: [[BEGIN:%.*]] = getelementptr inbounds [5 x [[A]]]* [[ELEMS]], i32 0, i32 0
242 // CHECK-NEXT: [[END:%.*]] = getelementptr inbounds [[A]]* [[BEGIN]], i64 5
243 // CHECK-NEXT: br label
244 // CHECK: [[POST:%.*]] = phi [[A]]* [ [[END]], {{%.*}} ], [ [[ELT:%.*]], {{%.*}} ]
245 // CHECK-NEXT: [[ELT]] = getelementptr inbounds [[A]]* [[POST]], i64 -1
246 // CHECK-NEXT: invoke void @_ZN5test51AD1Ev([[A]]* [[ELT]])
247 // CHECK: [[T0:%.*]] = icmp eq [[A]]* [[ELT]], [[BEGIN]]
248 // CHECK-NEXT: br i1 [[T0]],
249 // CHECK: ret void
250 // lpad
251 // CHECK: [[EMPTY:%.*]] = icmp eq [[A]]* [[BEGIN]], [[ELT]]
252 // CHECK-NEXT: br i1 [[EMPTY]]
253 // CHECK: [[AFTER:%.*]] = phi [[A]]* [ [[ELT]], {{%.*}} ], [ [[CUR:%.*]], {{%.*}} ]
254 // CHECK-NEXT: [[CUR:%.*]] = getelementptr inbounds [[A]]* [[AFTER]], i64 -1
255 // CHECK-NEXT: invoke void @_ZN5test51AD1Ev([[A]]* [[CUR]])
256 // CHECK: [[DONE:%.*]] = icmp eq [[A]]* [[CUR]], [[BEGIN]]
257 // CHECK-NEXT: br i1 [[DONE]],
foo()258 void foo() {
259 A elems[5];
260 }
261 }
262
263 namespace test6 {
264 void opaque();
265
266 struct A { ~A(); };
267 template <unsigned> struct B { B(); ~B(); int _; };
268 struct C : B<0>, B<1>, virtual B<2>, virtual B<3> {
269 A x, y, z;
270
271 C();
272 ~C();
273 };
274
C()275 C::C() { opaque(); }
276 // CHECK: define void @_ZN5test61CC1Ev(%"struct.test6::C"* %this) unnamed_addr
277 // CHECK: call void @_ZN5test61BILj2EEC2Ev
278 // CHECK: invoke void @_ZN5test61BILj3EEC2Ev
279 // CHECK: invoke void @_ZN5test61BILj0EEC2Ev
280 // CHECK: invoke void @_ZN5test61BILj1EEC2Ev
281 // CHECK: invoke void @_ZN5test66opaqueEv
282 // CHECK: ret void
283 // FIXME: way too much EH cleanup code follows
284
~C()285 C::~C() { opaque(); }
286 // CHECK: define void @_ZN5test61CD1Ev(%"struct.test6::C"* %this) unnamed_addr
287 // CHECK: invoke void @_ZN5test61CD2Ev
288 // CHECK: invoke void @_ZN5test61BILj3EED2Ev
289 // CHECK: call void @_ZN5test61BILj2EED2Ev
290 // CHECK: ret void
291 // CHECK: invoke void @_ZN5test61BILj3EED2Ev
292 // CHECK: invoke void @_ZN5test61BILj2EED2Ev
293
294 // CHECK: define void @_ZN5test61CD2Ev(%"struct.test6::C"* %this, i8** %vtt) unnamed_addr
295 // CHECK: invoke void @_ZN5test66opaqueEv
296 // CHECK: invoke void @_ZN5test61AD1Ev
297 // CHECK: invoke void @_ZN5test61AD1Ev
298 // CHECK: invoke void @_ZN5test61AD1Ev
299 // CHECK: invoke void @_ZN5test61BILj1EED2Ev
300 // CHECK: call void @_ZN5test61BILj0EED2Ev
301 // CHECK: ret void
302 // CHECK: invoke void @_ZN5test61AD1Ev
303 // CHECK: invoke void @_ZN5test61AD1Ev
304 // CHECK: invoke void @_ZN5test61AD1Ev
305 // CHECK: invoke void @_ZN5test61BILj1EED2Ev
306 // CHECK: invoke void @_ZN5test61BILj0EED2Ev
307 }
308
309 // PR 9197
310 namespace test7 {
311 struct D { ~D(); };
312
313 struct A { ~A(); };
~A()314 A::~A() { }
315
316 struct B : public A {
317 ~B();
318 D arr[1];
319 };
320
321 // Verify that this doesn't get emitted as an alias
322 // CHECK: define void @_ZN5test71BD2Ev(
323 // CHECK: invoke void @_ZN5test71DD1Ev(
324 // CHECK: call void @_ZN5test71AD2Ev(
~B()325 B::~B() {}
326
327 }
328
329 // Checks from test3:
330
331 // CHECK: define internal void @_ZN5test312_GLOBAL__N_11DD0Ev(%"struct.test3::<anonymous namespace>::D"* %this) unnamed_addr
332 // CHECK: invoke void @_ZN5test312_GLOBAL__N_11DD1Ev(
333 // CHECK: call void @_ZdlPv({{.*}}) nounwind
334 // CHECK: ret void
335 // CHECK: call i8* @llvm.eh.exception(
336 // CHECK: call void @_ZdlPv({{.*}}) nounwind
337 // CHECK: call void @llvm.eh.resume(
338
339 // Checked at top of file:
340 // @_ZN5test312_GLOBAL__N_11DD1Ev = alias internal {{.*}} @_ZN5test312_GLOBAL__N_11DD2Ev
341 // @_ZN5test312_GLOBAL__N_11DD2Ev = alias internal bitcast {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
342
343 // CHECK: define internal void @_ZThn8_N5test312_GLOBAL__N_11DD1Ev(
344 // CHECK: getelementptr inbounds i8* {{.*}}, i64 -8
345 // CHECK: call void @_ZN5test312_GLOBAL__N_11DD1Ev(
346 // CHECK: ret void
347
348 // CHECK: define internal void @_ZThn8_N5test312_GLOBAL__N_11DD0Ev(
349 // CHECK: getelementptr inbounds i8* {{.*}}, i64 -8
350 // CHECK: call void @_ZN5test312_GLOBAL__N_11DD0Ev(
351 // CHECK: ret void
352
353 // CHECK: define internal void @_ZN5test312_GLOBAL__N_11CD2Ev(%"struct.test3::<anonymous namespace>::C"* %this) unnamed_addr
354 // CHECK: invoke void @_ZN5test31BD2Ev(
355 // CHECK: call void @_ZN5test31AD2Ev(
356 // CHECK: ret void
357
358 // CHECK: declare void @_ZN5test31BD2Ev(
359 // CHECK: declare void @_ZN5test31AD2Ev(
360
361 // CHECK: define internal void @_ZN5test312_GLOBAL__N_11CD0Ev(%"struct.test3::<anonymous namespace>::C"* %this) unnamed_addr
362 // CHECK: invoke void @_ZN5test312_GLOBAL__N_11CD1Ev(
363 // CHECK: call void @_ZdlPv({{.*}}) nounwind
364 // CHECK: ret void
365 // CHECK: call i8* @llvm.eh.exception()
366 // CHECK: call void @_ZdlPv({{.*}}) nounwind
367 // CHECK: call void @llvm.eh.resume(
368
369 // CHECK: define internal void @_ZThn8_N5test312_GLOBAL__N_11CD1Ev(
370 // CHECK: getelementptr inbounds i8* {{.*}}, i64 -8
371 // CHECK: call void @_ZN5test312_GLOBAL__N_11CD1Ev(
372 // CHECK: ret void
373
374 // CHECK: define internal void @_ZThn8_N5test312_GLOBAL__N_11CD0Ev(
375 // CHECK: getelementptr inbounds i8* {{.*}}, i64 -8
376 // CHECK: call void @_ZN5test312_GLOBAL__N_11CD0Ev(
377 // CHECK: ret void
378