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  int foo() {
106// CHECK:      [[CAUGHTEXNVAR:%.*]] = alloca i8*
107// CHECK-NEXT: [[SELECTORVAR:%.*]] = alloca i32
108// CHECK-NEXT: [[INTCATCHVAR:%.*]] = alloca i32
109    try {
110      try {
111// CHECK-NEXT: [[EXNALLOC:%.*]] = call i8* @__cxa_allocate_exception
112// CHECK-NEXT: bitcast i8* [[EXNALLOC]] to i32*
113// CHECK-NEXT: store i32 1, i32*
114// CHECK-NEXT: invoke void @__cxa_throw(i8* [[EXNALLOC]], i8* bitcast (i8** @_ZTIi to i8*), i8* null
115        throw 1;
116      }
117
118// CHECK:      [[CAUGHTVAL:%.*]] = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
119// CHECK-NEXT:   catch i8* bitcast (i8** @_ZTIi to i8*)
120// CHECK-NEXT:   catch i8* null
121// CHECK-NEXT: [[CAUGHTEXN:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 0
122// CHECK-NEXT: store i8* [[CAUGHTEXN]], i8** [[CAUGHTEXNVAR]]
123// CHECK-NEXT: [[SELECTOR:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 1
124// CHECK-NEXT: store i32 [[SELECTOR]], i32* [[SELECTORVAR]]
125// CHECK-NEXT: br label
126// CHECK:      [[SELECTOR:%.*]] = load i32, i32* [[SELECTORVAR]]
127// CHECK-NEXT: [[T0:%.*]] = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
128// CHECK-NEXT: icmp eq i32 [[SELECTOR]], [[T0]]
129// CHECK-NEXT: br i1
130// CHECK:      [[T0:%.*]] = load i8*, i8** [[CAUGHTEXNVAR]]
131// CHECK-NEXT: [[T1:%.*]] = call i8* @__cxa_begin_catch(i8* [[T0]])
132// CHECK-NEXT: [[T2:%.*]] = bitcast i8* [[T1]] to i32*
133// CHECK-NEXT: [[T3:%.*]] = load i32, i32* [[T2]]
134// CHECK-NEXT: store i32 [[T3]], i32* {{%.*}}, align 4
135// CHECK-NEXT: invoke void @__cxa_rethrow
136      catch (int) {
137        throw;
138      }
139    }
140// CHECK:      [[CAUGHTVAL:%.*]] = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
141// CHECK-NEXT:   catch i8* null
142// CHECK-NEXT: [[CAUGHTEXN:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 0
143// CHECK-NEXT: store i8* [[CAUGHTEXN]], i8** [[CAUGHTEXNVAR]]
144// CHECK-NEXT: [[SELECTOR:%.*]] = extractvalue { i8*, i32 } [[CAUGHTVAL]], 1
145// CHECK-NEXT: store i32 [[SELECTOR]], i32* [[SELECTORVAR]]
146// CHECK-NEXT: call void @__cxa_end_catch()
147// CHECK-NEXT: br label
148// CHECK:      load i8*, i8** [[CAUGHTEXNVAR]]
149// CHECK-NEXT: call i8* @__cxa_begin_catch
150// CHECK-NEXT: call void @__cxa_end_catch
151    catch (...) {
152    }
153// CHECK:      ret i32 0
154    return 0;
155  }
156}
157
158// Ordering of destructors in a catch handler.
159namespace test8 {
160  struct A { A(const A&); ~A(); };
161  void bar();
162
163  // CHECK-LABEL: define void @_ZN5test83fooEv()
164  void foo() {
165    try {
166      // CHECK:      invoke void @_ZN5test83barEv()
167      bar();
168    } catch (A a) {
169      // CHECK:      call i8* @__cxa_get_exception_ptr
170      // CHECK-NEXT: bitcast
171      // CHECK-NEXT: invoke void @_ZN5test81AC1ERKS0_(
172      // CHECK:      call i8* @__cxa_begin_catch
173      // CHECK-NEXT: call void @_ZN5test81AD1Ev(
174      // CHECK:      call void @__cxa_end_catch()
175      // CHECK:      ret void
176    }
177  }
178}
179
180// Constructor function-try-block must rethrow on fallthrough.
181// rdar://problem/7696603
182namespace test9 {
183  void opaque();
184
185  struct A { A(); };
186
187
188  // CHECK-LABEL: define void @_ZN5test91AC2Ev(%"struct.test9::A"* %this) unnamed_addr
189  A::A() try {
190  // CHECK:      invoke void @_ZN5test96opaqueEv()
191    opaque();
192  } catch (int x) {
193  // CHECK:      landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
194  // CHECK-NEXT:   catch i8* bitcast (i8** @_ZTIi to i8*)
195
196  // CHECK:      call i8* @__cxa_begin_catch
197  // CHECK:      invoke void @_ZN5test96opaqueEv()
198  // CHECK:      invoke void @__cxa_rethrow()
199
200  // CHECK-LABEL:      define void @_ZN5test91AC1Ev(%"struct.test9::A"* %this) unnamed_addr
201  // CHECK:      call void @_ZN5test91AC2Ev
202  // CHECK-NEXT: ret void
203    opaque();
204  }
205}
206
207// __cxa_end_catch can throw for some kinds of caught exceptions.
208namespace test10 {
209  void opaque();
210
211  struct A { ~A(); };
212  struct B { int x; };
213
214  // CHECK-LABEL: define void @_ZN6test103fooEv()
215  void foo() {
216    A a; // force a cleanup context
217
218    try {
219    // CHECK:      invoke void @_ZN6test106opaqueEv()
220      opaque();
221    } catch (int i) {
222    // CHECK:      call i8* @__cxa_begin_catch
223    // CHECK-NEXT: bitcast
224    // CHECK-NEXT: load i32, i32*
225    // CHECK-NEXT: store i32
226    // CHECK-NEXT: call void @__cxa_end_catch() [[NUW:#[0-9]+]]
227    } catch (B a) {
228    // CHECK:      call i8* @__cxa_begin_catch
229    // CHECK-NEXT: bitcast
230    // CHECK-NEXT: bitcast
231    // CHECK-NEXT: bitcast
232    // CHECK-NEXT: call void @llvm.memcpy
233    // CHECK-NEXT: invoke void @__cxa_end_catch()
234    } catch (...) {
235    // CHECK:      call i8* @__cxa_begin_catch
236    // CHECK-NEXT: invoke void @__cxa_end_catch()
237    }
238
239    // CHECK: call void @_ZN6test101AD1Ev(
240  }
241}
242
243// __cxa_begin_catch returns pointers by value, even when catching by reference
244// <rdar://problem/8212123>
245namespace test11 {
246  void opaque();
247
248  // CHECK-LABEL: define void @_ZN6test113fooEv()
249  void foo() {
250    try {
251      // CHECK:      invoke void @_ZN6test116opaqueEv()
252      opaque();
253    } catch (int**&p) {
254      // CHECK:      [[EXN:%.*]] = load i8*, i8**
255      // CHECK-NEXT: call i8* @__cxa_begin_catch(i8* [[EXN]]) [[NUW]]
256      // CHECK-NEXT: [[ADJ1:%.*]] = getelementptr i8, i8* [[EXN]], i32 32
257      // CHECK-NEXT: [[ADJ2:%.*]] = bitcast i8* [[ADJ1]] to i32***
258      // CHECK-NEXT: store i32*** [[ADJ2]], i32**** [[P:%.*]]
259      // CHECK-NEXT: call void @__cxa_end_catch() [[NUW]]
260    }
261  }
262
263  struct A {};
264
265  // CHECK-LABEL: define void @_ZN6test113barEv()
266  void bar() {
267    try {
268      // CHECK:      [[EXNSLOT:%.*]] = alloca i8*
269      // CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
270      // CHECK-NEXT: [[P:%.*]] = alloca [[A:%.*]]**,
271      // CHECK-NEXT: [[TMP:%.*]] = alloca [[A]]*
272      // CHECK-NEXT: invoke void @_ZN6test116opaqueEv()
273      opaque();
274    } catch (A*&p) {
275      // CHECK:      [[EXN:%.*]] = load i8*, i8** [[EXNSLOT]]
276      // CHECK-NEXT: [[ADJ1:%.*]] = call i8* @__cxa_begin_catch(i8* [[EXN]]) [[NUW]]
277      // CHECK-NEXT: [[ADJ2:%.*]] = bitcast i8* [[ADJ1]] to [[A]]*
278      // CHECK-NEXT: store [[A]]* [[ADJ2]], [[A]]** [[TMP]]
279      // CHECK-NEXT: store [[A]]** [[TMP]], [[A]]*** [[P]]
280      // CHECK-NEXT: call void @__cxa_end_catch() [[NUW]]
281    }
282  }
283}
284
285// PR7686
286namespace test12 {
287  struct A { ~A() noexcept(false); };
288  bool opaque(const A&);
289
290  // CHECK-LABEL: define void @_ZN6test124testEv()
291  void test() {
292    // CHECK: [[X:%.*]] = alloca [[A:%.*]],
293    // CHECK: [[EHCLEANUPDEST:%.*]] = alloca i32
294    // CHECK: [[Y:%.*]] = alloca [[A]]
295    // CHECK: [[Z:%.*]] = alloca [[A]]
296    // CHECK: [[CLEANUPDEST:%.*]] = alloca i32
297
298    A x;
299    // CHECK: invoke zeroext i1 @_ZN6test126opaqueERKNS_1AE(
300    if (opaque(x)) {
301      A y;
302      A z;
303
304      // CHECK: invoke void @_ZN6test121AD1Ev([[A]]* [[Z]])
305      // CHECK: invoke void @_ZN6test121AD1Ev([[A]]* [[Y]])
306      // CHECK-NOT: switch
307      goto success;
308    }
309
310  success:
311    bool _ = true;
312
313    // CHECK: call void @_ZN6test121AD1Ev([[A]]* [[X]])
314    // CHECK-NEXT: ret void
315  }
316}
317
318// Reduced from some TableGen code that was causing a self-host crash.
319namespace test13 {
320  struct A { ~A(); };
321
322  void test0(int x) {
323    try {
324      switch (x) {
325      case 0:
326        break;
327      case 1:{
328        A a;
329        break;
330      }
331      default:
332        return;
333      }
334      return;
335    } catch (int x) {
336    }
337    return;
338  }
339
340  void test1(int x) {
341    A y;
342    try {
343      switch (x) {
344      default: break;
345      }
346    } catch (int x) {}
347  }
348}
349
350// rdar://problem/8231514
351namespace test14 {
352  struct A { ~A(); };
353  struct B { ~B(); };
354
355  B b();
356  void opaque();
357
358  void foo() {
359    A a;
360    try {
361      B str = b();
362      opaque();
363    } catch (int x) {
364    }
365  }
366}
367
368// rdar://problem/8231514
369// JumpDests shouldn't get confused by scopes that aren't normal cleanups.
370namespace test15 {
371  struct A { ~A(); };
372
373  bool opaque(int);
374
375  // CHECK-LABEL: define void @_ZN6test153fooEv()
376  void foo() {
377    A a;
378
379    try {
380      // CHECK:      [[X:%.*]] = alloca i32
381      // CHECK:      store i32 10, i32* [[X]]
382      // CHECK-NEXT: br label
383      //   -> while.cond
384      int x = 10;
385
386      while (true) {
387        // CHECK:      load i32, i32* [[X]]
388        // CHECK-NEXT: [[COND:%.*]] = invoke zeroext i1 @_ZN6test156opaqueEi
389        // CHECK:      br i1 [[COND]]
390        if (opaque(x))
391        // CHECK:      br label
392          break;
393
394        // CHECK:      br label
395      }
396      // CHECK:      br label
397    } catch (int x) { }
398
399    // CHECK: call void @_ZN6test151AD1Ev
400  }
401}
402
403namespace test16 {
404  struct A { A(); ~A() noexcept(false); };
405  struct B { int x; B(const A &); ~B() noexcept(false); };
406  void foo();
407  bool cond();
408
409  // CHECK-LABEL: define void @_ZN6test163barEv()
410  void bar() {
411    // CHECK:      [[EXN_SAVE:%.*]] = alloca i8*
412    // CHECK-NEXT: [[EXN_ACTIVE:%.*]] = alloca i1
413    // CHECK-NEXT: [[TEMP:%.*]] = alloca [[A:%.*]],
414    // CHECK-NEXT: [[EXNSLOT:%.*]] = alloca i8*
415    // CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
416    // CHECK-NEXT: [[TEMP_ACTIVE:%.*]] = alloca i1
417
418    cond() ? throw B(A()) : foo();
419
420    // CHECK-NEXT: [[COND:%.*]] = call zeroext i1 @_ZN6test164condEv()
421    // CHECK-NEXT: store i1 false, i1* [[EXN_ACTIVE]]
422    // CHECK-NEXT: store i1 false, i1* [[TEMP_ACTIVE]]
423    // CHECK-NEXT: br i1 [[COND]],
424
425    // CHECK:      [[EXN:%.*]] = call i8* @__cxa_allocate_exception(i64 4)
426    // CHECK-NEXT: store i8* [[EXN]], i8** [[EXN_SAVE]]
427    // CHECK-NEXT: store i1 true, i1* [[EXN_ACTIVE]]
428    // CHECK-NEXT: [[T0:%.*]] = bitcast i8* [[EXN]] to [[B:%.*]]*
429    // CHECK-NEXT: invoke void @_ZN6test161AC1Ev([[A]]* [[TEMP]])
430    // CHECK:      store i1 true, i1* [[TEMP_ACTIVE]]
431    // CHECK-NEXT: invoke void @_ZN6test161BC1ERKNS_1AE([[B]]* [[T0]], [[A]]* dereferenceable({{[0-9]+}}) [[TEMP]])
432    // CHECK:      store i1 false, i1* [[EXN_ACTIVE]]
433    // CHECK-NEXT: invoke void @__cxa_throw(i8* [[EXN]],
434
435    // CHECK:      invoke void @_ZN6test163fooEv()
436    // CHECK:      br label
437
438    // CHECK:      invoke void @_ZN6test161AD1Ev([[A]]* [[TEMP]])
439    // CHECK:      ret void
440
441    // CHECK:      [[T0:%.*]] = load i1, i1* [[EXN_ACTIVE]]
442    // CHECK-NEXT: br i1 [[T0]]
443    // CHECK:      [[T1:%.*]] = load i8*, i8** [[EXN_SAVE]]
444    // CHECK-NEXT: call void @__cxa_free_exception(i8* [[T1]])
445    // CHECK-NEXT: br label
446  }
447}
448
449// CHECK: attributes [[NUW]] = { nounwind }
450// CHECK: attributes [[NR]] = { noreturn }
451