1// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-darwin -std=c++11 -emit-llvm %s -o %t.ll
2// RUN: FileCheck --input-file=%t.ll %s
3
4struct test1_D {
5  double d;
6} d1;
7
8void test1() {
9  throw d1;
10}
11
12// CHECK-LABEL:     define void @_Z5test1v()
13// CHECK:       [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 8)
14// CHECK-NEXT:  [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[DSTAR:%[^*]*\*]]
15// CHECK-NEXT:  [[EXN2:%.*]] = bitcast [[DSTAR]] [[EXN]] to i8*
16// CHECK-NEXT:  call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[EXN2]], i8* bitcast ([[DSTAR]] @d1 to i8*), i64 8, i32 8, i1 false)
17// CHECK-NEXT:  call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({ i8*, i8* }* @_ZTI7test1_D to i8*), i8* null) [[NR:#[0-9]+]]
18// CHECK-NEXT:  unreachable
19
20
21struct test2_D {
22  test2_D(const test2_D&o);
23  test2_D();
24  virtual void bar() { }
25  int i; int j;
26} d2;
27
28void test2() {
29  throw d2;
30}
31
32// CHECK-LABEL:     define void @_Z5test2v()
33// CHECK:       [[EXNVAR:%.*]] = alloca i8*
34// CHECK-NEXT:  [[SELECTORVAR:%.*]] = alloca i32
35// CHECK-NEXT:  [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 16)
36// CHECK-NEXT:  [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[DSTAR:%[^*]*\*]]
37// CHECK-NEXT:  invoke void @_ZN7test2_DC1ERKS_([[DSTAR]] [[EXN]], [[DSTAR]] dereferenceable({{[0-9]+}}) @d2)
38// CHECK-NEXT:     to label %[[CONT:.*]] unwind label %{{.*}}
39//      :     [[CONT]]:   (can't check this in Release-Asserts builds)
40// CHECK:       call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({{.*}}* @_ZTI7test2_D to i8*), i8* null) [[NR]]
41// CHECK-NEXT:  unreachable
42
43
44struct test3_D {
45  test3_D() { }
46  test3_D(volatile test3_D&o);
47  virtual void bar();
48};
49
50void test3() {
51  throw (volatile test3_D *)0;
52}
53
54// CHECK-LABEL:     define void @_Z5test3v()
55// CHECK:       [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 8)
56// CHECK-NEXT:  [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[D:%[^*]+]]**
57// CHECK-NEXT:  store [[D]]* null, [[D]]** [[EXN]]
58// CHECK-NEXT:  call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({ i8*, i8*, i32, i8* }* @_ZTIPV7test3_D to i8*), i8* null) [[NR]]
59// CHECK-NEXT:  unreachable
60
61
62void test4() {
63  throw;
64}
65
66// CHECK-LABEL:     define void @_Z5test4v()
67// CHECK:        call void @__cxa_rethrow() [[NR]]
68// CHECK-NEXT:   unreachable
69
70
71// rdar://problem/7696549
72namespace test5 {
73  struct A {
74    A();
75    A(const A&);
76    ~A();
77  };
78
79  void test() {
80    try { throw A(); } catch (A &x) {}
81  }
82// CHECK-LABEL:      define void @_ZN5test54testEv()
83// CHECK:      [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 1)
84// CHECK:      [[EXNCAST:%.*]] = bitcast i8* [[EXNOBJ]] to [[A:%[^*]*]]*
85// CHECK-NEXT: invoke void @_ZN5test51AC1Ev([[A]]* [[EXNCAST]])
86// CHECK:      invoke void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({{.*}}* @_ZTIN5test51AE to i8*), i8* bitcast (void ([[A]]*)* @_ZN5test51AD1Ev to i8*)) [[NR]]
87// CHECK-NEXT:   to label {{%.*}} unwind label %[[HANDLER:[^ ]*]]
88//      :    [[HANDLER]]:  (can't check this in Release-Asserts builds)
89// CHECK:      {{%.*}} = call i32 @llvm.eh.typeid.for(i8* bitcast ({{.*}}* @_ZTIN5test51AE to i8*))
90}
91
92namespace test6 {
93  template <class T> struct allocator {
94    ~allocator() throw() { }
95  };
96
97  void foo() {
98    allocator<int> a;
99  }
100}
101
102// PR7127
103namespace test7 {
104// CHECK-LABEL:      define i32 @_ZN5test73fooEv()
105// CHECK-SAME:  personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
106  int foo() {
107// CHECK:      [[CAUGHTEXNVAR:%.*]] = alloca i8*
108// CHECK-NEXT: [[SELECTORVAR:%.*]] = alloca i32
109// CHECK-NEXT: [[INTCATCHVAR:%.*]] = alloca i32
110    try {
111      try {
112// CHECK-NEXT: [[EXNALLOC:%.*]] = call i8* @__cxa_allocate_exception
113// CHECK-NEXT: bitcast i8* [[EXNALLOC]] to i32*
114// CHECK-NEXT: store i32 1, i32*
115// CHECK-NEXT: invoke void @__cxa_throw(i8* [[EXNALLOC]], i8* bitcast (i8** @_ZTIi to i8*), i8* null
116        throw 1;
117      }
118
119// CHECK:      [[CAUGHTVAL:%.*]] = landingpad { i8*, i32 }
120// CHECK-NEXT:   catch i8* bitcast (i8** @_ZTIi to i8*)
121// CHECK-NEXT:   catch i8* null
122// CHECK-NEXT: [[CAUGHTEXN:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 0
123// CHECK-NEXT: store i8* [[CAUGHTEXN]], i8** [[CAUGHTEXNVAR]]
124// CHECK-NEXT: [[SELECTOR:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 1
125// CHECK-NEXT: store i32 [[SELECTOR]], i32* [[SELECTORVAR]]
126// CHECK-NEXT: br label
127// CHECK:      [[SELECTOR:%.*]] = load i32, i32* [[SELECTORVAR]]
128// CHECK-NEXT: [[T0:%.*]] = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
129// CHECK-NEXT: icmp eq i32 [[SELECTOR]], [[T0]]
130// CHECK-NEXT: br i1
131// CHECK:      [[T0:%.*]] = load i8*, i8** [[CAUGHTEXNVAR]]
132// CHECK-NEXT: [[T1:%.*]] = call i8* @__cxa_begin_catch(i8* [[T0]])
133// CHECK-NEXT: [[T2:%.*]] = bitcast i8* [[T1]] to i32*
134// CHECK-NEXT: [[T3:%.*]] = load i32, i32* [[T2]]
135// CHECK-NEXT: store i32 [[T3]], i32* {{%.*}}, align 4
136// CHECK-NEXT: invoke void @__cxa_rethrow
137      catch (int) {
138        throw;
139      }
140    }
141// CHECK:      [[CAUGHTVAL:%.*]] = landingpad { i8*, i32 }
142// CHECK-NEXT:   catch i8* null
143// CHECK-NEXT: [[CAUGHTEXN:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 0
144// CHECK-NEXT: store i8* [[CAUGHTEXN]], i8** [[CAUGHTEXNVAR]]
145// CHECK-NEXT: [[SELECTOR:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 1
146// CHECK-NEXT: store i32 [[SELECTOR]], i32* [[SELECTORVAR]]
147// CHECK-NEXT: call void @__cxa_end_catch()
148// CHECK-NEXT: br label
149// CHECK:      load i8*, i8** [[CAUGHTEXNVAR]]
150// CHECK-NEXT: call i8* @__cxa_begin_catch
151// CHECK-NEXT: call void @__cxa_end_catch
152    catch (...) {
153    }
154// CHECK:      ret i32 0
155    return 0;
156  }
157}
158
159// Ordering of destructors in a catch handler.
160namespace test8 {
161  struct A { A(const A&); ~A(); };
162  void bar();
163
164  // CHECK-LABEL: define void @_ZN5test83fooEv()
165  void foo() {
166    try {
167      // CHECK:      invoke void @_ZN5test83barEv()
168      bar();
169    } catch (A a) {
170      // CHECK:      call i8* @__cxa_get_exception_ptr
171      // CHECK-NEXT: bitcast
172      // CHECK-NEXT: invoke void @_ZN5test81AC1ERKS0_(
173      // CHECK:      call i8* @__cxa_begin_catch
174      // CHECK-NEXT: call void @_ZN5test81AD1Ev(
175      // CHECK:      call void @__cxa_end_catch()
176      // CHECK:      ret void
177    }
178  }
179}
180
181// Constructor function-try-block must rethrow on fallthrough.
182// rdar://problem/7696603
183namespace test9 {
184  void opaque();
185
186  struct A { A(); };
187
188
189  // CHECK-LABEL: define void @_ZN5test91AC2Ev(%"struct.test9::A"* %this) unnamed_addr
190  // CHECK-SAME:  personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
191  A::A() try {
192  // CHECK:      invoke void @_ZN5test96opaqueEv()
193    opaque();
194  } catch (int x) {
195  // CHECK:      landingpad { i8*, i32 }
196  // CHECK-NEXT:   catch i8* bitcast (i8** @_ZTIi to i8*)
197
198  // CHECK:      call i8* @__cxa_begin_catch
199  // CHECK:      invoke void @_ZN5test96opaqueEv()
200  // CHECK:      invoke void @__cxa_rethrow()
201
202  // CHECK-LABEL:      define void @_ZN5test91AC1Ev(%"struct.test9::A"* %this) unnamed_addr
203  // CHECK:      call void @_ZN5test91AC2Ev
204  // CHECK-NEXT: ret void
205    opaque();
206  }
207}
208
209// __cxa_end_catch can throw for some kinds of caught exceptions.
210namespace test10 {
211  void opaque();
212
213  struct A { ~A(); };
214  struct B { int x; };
215
216  // CHECK-LABEL: define void @_ZN6test103fooEv()
217  void foo() {
218    A a; // force a cleanup context
219
220    try {
221    // CHECK:      invoke void @_ZN6test106opaqueEv()
222      opaque();
223    } catch (int i) {
224    // CHECK:      call i8* @__cxa_begin_catch
225    // CHECK-NEXT: bitcast
226    // CHECK-NEXT: load i32, i32*
227    // CHECK-NEXT: store i32
228    // CHECK-NEXT: call void @__cxa_end_catch() [[NUW:#[0-9]+]]
229    } catch (B a) {
230    // CHECK:      call i8* @__cxa_begin_catch
231    // CHECK-NEXT: bitcast
232    // CHECK-NEXT: bitcast
233    // CHECK-NEXT: bitcast
234    // CHECK-NEXT: call void @llvm.memcpy
235    // CHECK-NEXT: invoke void @__cxa_end_catch()
236    } catch (...) {
237    // CHECK:      call i8* @__cxa_begin_catch
238    // CHECK-NEXT: invoke void @__cxa_end_catch()
239    }
240
241    // CHECK: call void @_ZN6test101AD1Ev(
242  }
243}
244
245// __cxa_begin_catch returns pointers by value, even when catching by reference
246// <rdar://problem/8212123>
247namespace test11 {
248  void opaque();
249
250  // CHECK-LABEL: define void @_ZN6test113fooEv()
251  void foo() {
252    try {
253      // CHECK:      invoke void @_ZN6test116opaqueEv()
254      opaque();
255    } catch (int**&p) {
256      // CHECK:      [[EXN:%.*]] = load i8*, i8**
257      // CHECK-NEXT: call i8* @__cxa_begin_catch(i8* [[EXN]]) [[NUW]]
258      // CHECK-NEXT: [[ADJ1:%.*]] = getelementptr i8, i8* [[EXN]], i32 32
259      // CHECK-NEXT: [[ADJ2:%.*]] = bitcast i8* [[ADJ1]] to i32***
260      // CHECK-NEXT: store i32*** [[ADJ2]], i32**** [[P:%.*]]
261      // CHECK-NEXT: call void @__cxa_end_catch() [[NUW]]
262    }
263  }
264
265  struct A {};
266
267  // CHECK-LABEL: define void @_ZN6test113barEv()
268  void bar() {
269    try {
270      // CHECK:      [[EXNSLOT:%.*]] = alloca i8*
271      // CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
272      // CHECK-NEXT: [[P:%.*]] = alloca [[A:%.*]]**,
273      // CHECK-NEXT: [[TMP:%.*]] = alloca [[A]]*
274      // CHECK-NEXT: invoke void @_ZN6test116opaqueEv()
275      opaque();
276    } catch (A*&p) {
277      // CHECK:      [[EXN:%.*]] = load i8*, i8** [[EXNSLOT]]
278      // CHECK-NEXT: [[ADJ1:%.*]] = call i8* @__cxa_begin_catch(i8* [[EXN]]) [[NUW]]
279      // CHECK-NEXT: [[ADJ2:%.*]] = bitcast i8* [[ADJ1]] to [[A]]*
280      // CHECK-NEXT: store [[A]]* [[ADJ2]], [[A]]** [[TMP]]
281      // CHECK-NEXT: store [[A]]** [[TMP]], [[A]]*** [[P]]
282      // CHECK-NEXT: call void @__cxa_end_catch() [[NUW]]
283    }
284  }
285}
286
287// PR7686
288namespace test12 {
289  struct A { ~A() noexcept(false); };
290  bool opaque(const A&);
291
292  // CHECK-LABEL: define void @_ZN6test124testEv()
293  void test() {
294    // CHECK: [[X:%.*]] = alloca [[A:%.*]],
295    // CHECK: [[EHCLEANUPDEST:%.*]] = alloca i32
296    // CHECK: [[Y:%.*]] = alloca [[A]]
297    // CHECK: [[Z:%.*]] = alloca [[A]]
298    // CHECK: [[CLEANUPDEST:%.*]] = alloca i32
299
300    A x;
301    // CHECK: invoke zeroext i1 @_ZN6test126opaqueERKNS_1AE(
302    if (opaque(x)) {
303      A y;
304      A z;
305
306      // CHECK: invoke void @_ZN6test121AD1Ev([[A]]* [[Z]])
307      // CHECK: invoke void @_ZN6test121AD1Ev([[A]]* [[Y]])
308      // CHECK-NOT: switch
309      goto success;
310    }
311
312  success:
313    bool _ = true;
314
315    // CHECK: call void @_ZN6test121AD1Ev([[A]]* [[X]])
316    // CHECK-NEXT: ret void
317  }
318}
319
320// Reduced from some TableGen code that was causing a self-host crash.
321namespace test13 {
322  struct A { ~A(); };
323
324  void test0(int x) {
325    try {
326      switch (x) {
327      case 0:
328        break;
329      case 1:{
330        A a;
331        break;
332      }
333      default:
334        return;
335      }
336      return;
337    } catch (int x) {
338    }
339    return;
340  }
341
342  void test1(int x) {
343    A y;
344    try {
345      switch (x) {
346      default: break;
347      }
348    } catch (int x) {}
349  }
350}
351
352// rdar://problem/8231514
353namespace test14 {
354  struct A { ~A(); };
355  struct B { ~B(); };
356
357  B b();
358  void opaque();
359
360  void foo() {
361    A a;
362    try {
363      B str = b();
364      opaque();
365    } catch (int x) {
366    }
367  }
368}
369
370// rdar://problem/8231514
371// JumpDests shouldn't get confused by scopes that aren't normal cleanups.
372namespace test15 {
373  struct A { ~A(); };
374
375  bool opaque(int);
376
377  // CHECK-LABEL: define void @_ZN6test153fooEv()
378  void foo() {
379    A a;
380
381    try {
382      // CHECK:      [[X:%.*]] = alloca i32
383      // CHECK:      store i32 10, i32* [[X]]
384      // CHECK-NEXT: br label
385      //   -> while.cond
386      int x = 10;
387
388      while (true) {
389        // CHECK:      load i32, i32* [[X]]
390        // CHECK-NEXT: [[COND:%.*]] = invoke zeroext i1 @_ZN6test156opaqueEi
391        // CHECK:      br i1 [[COND]]
392        if (opaque(x))
393        // CHECK:      br label
394          break;
395
396        // CHECK:      br label
397      }
398      // CHECK:      br label
399    } catch (int x) { }
400
401    // CHECK: call void @_ZN6test151AD1Ev
402  }
403}
404
405namespace test16 {
406  struct A { A(); ~A() noexcept(false); };
407  struct B { int x; B(const A &); ~B() noexcept(false); };
408  void foo();
409  bool cond();
410
411  // CHECK-LABEL: define void @_ZN6test163barEv()
412  void bar() {
413    // CHECK:      [[EXN_SAVE:%.*]] = alloca i8*
414    // CHECK-NEXT: [[EXN_ACTIVE:%.*]] = alloca i1
415    // CHECK-NEXT: [[TEMP:%.*]] = alloca [[A:%.*]],
416    // CHECK-NEXT: [[EXNSLOT:%.*]] = alloca i8*
417    // CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
418    // CHECK-NEXT: [[TEMP_ACTIVE:%.*]] = alloca i1
419
420    cond() ? throw B(A()) : foo();
421
422    // CHECK-NEXT: [[COND:%.*]] = call zeroext i1 @_ZN6test164condEv()
423    // CHECK-NEXT: store i1 false, i1* [[EXN_ACTIVE]]
424    // CHECK-NEXT: store i1 false, i1* [[TEMP_ACTIVE]]
425    // CHECK-NEXT: br i1 [[COND]],
426
427    // CHECK:      [[EXN:%.*]] = call i8* @__cxa_allocate_exception(i64 4)
428    // CHECK-NEXT: store i8* [[EXN]], i8** [[EXN_SAVE]]
429    // CHECK-NEXT: store i1 true, i1* [[EXN_ACTIVE]]
430    // CHECK-NEXT: [[T0:%.*]] = bitcast i8* [[EXN]] to [[B:%.*]]*
431    // CHECK-NEXT: invoke void @_ZN6test161AC1Ev([[A]]* [[TEMP]])
432    // CHECK:      store i1 true, i1* [[TEMP_ACTIVE]]
433    // CHECK-NEXT: invoke void @_ZN6test161BC1ERKNS_1AE([[B]]* [[T0]], [[A]]* dereferenceable({{[0-9]+}}) [[TEMP]])
434    // CHECK:      store i1 false, i1* [[EXN_ACTIVE]]
435    // CHECK-NEXT: invoke void @__cxa_throw(i8* [[EXN]],
436
437    // CHECK:      invoke void @_ZN6test163fooEv()
438    // CHECK:      br label
439
440    // CHECK:      invoke void @_ZN6test161AD1Ev([[A]]* [[TEMP]])
441    // CHECK:      ret void
442
443    // CHECK:      [[T0:%.*]] = load i1, i1* [[EXN_ACTIVE]]
444    // CHECK-NEXT: br i1 [[T0]]
445    // CHECK:      [[T1:%.*]] = load i8*, i8** [[EXN_SAVE]]
446    // CHECK-NEXT: call void @__cxa_free_exception(i8* [[T1]])
447    // CHECK-NEXT: br label
448  }
449}
450
451namespace test17 {
452class BaseException {
453private:
454  int a[4];
455public:
456  BaseException() {};
457};
458
459class DerivedException: public BaseException {
460};
461
462int foo() {
463  throw DerivedException();
464  // The alignment passed to memset is 8, not 16, on Darwin.
465
466  // CHECK: [[T0:%.*]] = call i8* @__cxa_allocate_exception(i64 16)
467  // CHECK-NEXT: [[T1:%.*]] = bitcast i8* [[T0]] to %"class.test17::DerivedException"*
468  // CHECK-NEXT: [[T2:%.*]] = bitcast %"class.test17::DerivedException"* [[T1]] to i8*
469  // CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* [[T2]], i8 0, i64 16, i32 8, i1 false)
470}
471}
472
473// CHECK: attributes [[NUW]] = { nounwind }
474// CHECK: attributes [[NR]] = { noreturn }
475