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
4 struct test1_D {
5 double d;
6 } d1;
7
test1()8 void test1() {
9 throw d1;
10 }
11
12 // CHECK: 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) noreturn
18 // CHECK-NEXT: unreachable
19
20
21 struct test2_D {
22 test2_D(const test2_D&o);
23 test2_D();
bartest2_D24 virtual void bar() { }
25 int i; int j;
26 } d2;
27
test2()28 void test2() {
29 throw d2;
30 }
31
32 // CHECK: 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]] @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) noreturn
41 // CHECK-NEXT: unreachable
42
43
44 struct test3_D {
test3_Dtest3_D45 test3_D() { }
46 test3_D(volatile test3_D&o);
47 virtual void bar();
48 };
49
test3()50 void test3() {
51 throw (volatile test3_D *)0;
52 }
53
54 // CHECK: 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) noreturn
59 // CHECK-NEXT: unreachable
60
61
test4()62 void test4() {
63 throw;
64 }
65
66 // CHECK: define void @_Z5test4v()
67 // CHECK: call void @__cxa_rethrow() noreturn
68 // CHECK-NEXT: unreachable
69
70
71 // rdar://problem/7696549
72 namespace test5 {
73 struct A {
74 A();
75 A(const A&);
76 ~A();
77 };
78
test()79 void test() {
80 try { throw A(); } catch (A &x) {}
81 }
82 // CHECK: 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*)) noreturn
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
92 namespace test6 {
93 template <class T> struct allocator {
~allocatortest6::allocator94 ~allocator() throw() { }
95 };
96
foo()97 void foo() {
98 allocator<int> a;
99 }
100 }
101
102 // PR7127
103 namespace test7 {
104 // CHECK: define i32 @_ZN5test73fooEv()
foo()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* [[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** [[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* [[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** [[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.
159 namespace test8 {
160 struct A { A(const A&); ~A(); };
161 void bar();
162
163 // CHECK: define void @_ZN5test83fooEv()
foo()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
182 namespace test9 {
183 void opaque();
184
185 struct A { A(); };
186
187 // CHECK: define void @_ZN5test91AC1Ev(%"struct.test9::A"* %this) unnamed_addr
188 // CHECK: call void @_ZN5test91AC2Ev
189 // CHECK-NEXT: ret void
190
191 // CHECK: define void @_ZN5test91AC2Ev(%"struct.test9::A"* %this) unnamed_addr
A()192 A::A() try {
193 // CHECK: invoke void @_ZN5test96opaqueEv()
194 opaque();
195 } catch (int x) {
196 // CHECK: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
197 // CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*)
198
199 // CHECK: call i8* @__cxa_begin_catch
200 // CHECK: invoke void @_ZN5test96opaqueEv()
201 // CHECK: invoke void @__cxa_rethrow()
202 opaque();
203 }
204 }
205
206 // __cxa_end_catch can throw for some kinds of caught exceptions.
207 namespace test10 {
208 void opaque();
209
210 struct A { ~A(); };
211 struct B { int x; };
212
213 // CHECK: define void @_ZN6test103fooEv()
foo()214 void foo() {
215 A a; // force a cleanup context
216
217 try {
218 // CHECK: invoke void @_ZN6test106opaqueEv()
219 opaque();
220 } catch (int i) {
221 // CHECK: call i8* @__cxa_begin_catch
222 // CHECK-NEXT: bitcast
223 // CHECK-NEXT: load i32*
224 // CHECK-NEXT: store i32
225 // CHECK-NEXT: call void @__cxa_end_catch() nounwind
226 } catch (B a) {
227 // CHECK: call i8* @__cxa_begin_catch
228 // CHECK-NEXT: bitcast
229 // CHECK-NEXT: bitcast
230 // CHECK-NEXT: bitcast
231 // CHECK-NEXT: call void @llvm.memcpy
232 // CHECK-NEXT: invoke void @__cxa_end_catch()
233 } catch (...) {
234 // CHECK: call i8* @__cxa_begin_catch
235 // CHECK-NEXT: invoke void @__cxa_end_catch()
236 }
237
238 // CHECK: call void @_ZN6test101AD1Ev(
239 }
240 }
241
242 // __cxa_begin_catch returns pointers by value, even when catching by reference
243 // <rdar://problem/8212123>
244 namespace test11 {
245 void opaque();
246
247 // CHECK: define void @_ZN6test113fooEv()
foo()248 void foo() {
249 try {
250 // CHECK: invoke void @_ZN6test116opaqueEv()
251 opaque();
252 } catch (int**&p) {
253 // CHECK: [[EXN:%.*]] = load i8**
254 // CHECK-NEXT: call i8* @__cxa_begin_catch(i8* [[EXN]]) nounwind
255 // CHECK-NEXT: [[ADJ1:%.*]] = getelementptr i8* [[EXN]], i32 32
256 // CHECK-NEXT: [[ADJ2:%.*]] = bitcast i8* [[ADJ1]] to i32***
257 // CHECK-NEXT: store i32*** [[ADJ2]], i32**** [[P:%.*]]
258 // CHECK-NEXT: call void @__cxa_end_catch() nounwind
259 }
260 }
261
262 struct A {};
263
264 // CHECK: define void @_ZN6test113barEv()
bar()265 void bar() {
266 try {
267 // CHECK: [[EXNSLOT:%.*]] = alloca i8*
268 // CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
269 // CHECK-NEXT: [[P:%.*]] = alloca [[A:%.*]]**,
270 // CHECK-NEXT: [[TMP:%.*]] = alloca [[A]]*
271 // CHECK-NEXT: invoke void @_ZN6test116opaqueEv()
272 opaque();
273 } catch (A*&p) {
274 // CHECK: [[EXN:%.*]] = load i8** [[EXNSLOT]]
275 // CHECK-NEXT: [[ADJ1:%.*]] = call i8* @__cxa_begin_catch(i8* [[EXN]]) nounwind
276 // CHECK-NEXT: [[ADJ2:%.*]] = bitcast i8* [[ADJ1]] to [[A]]*
277 // CHECK-NEXT: store [[A]]* [[ADJ2]], [[A]]** [[TMP]]
278 // CHECK-NEXT: store [[A]]** [[TMP]], [[A]]*** [[P]]
279 // CHECK-NEXT: call void @__cxa_end_catch() nounwind
280 }
281 }
282 }
283
284 // PR7686
285 namespace test12 {
286 struct A { ~A() noexcept(false); };
287 bool opaque(const A&);
288
289 // CHECK: define void @_ZN6test124testEv()
test()290 void test() {
291 // CHECK: [[X:%.*]] = alloca [[A:%.*]],
292 // CHECK: [[EHCLEANUPDEST:%.*]] = alloca i32
293 // CHECK: [[Y:%.*]] = alloca [[A]]
294 // CHECK: [[Z:%.*]] = alloca [[A]]
295 // CHECK: [[CLEANUPDEST:%.*]] = alloca i32
296
297 A x;
298 // CHECK: invoke zeroext i1 @_ZN6test126opaqueERKNS_1AE(
299 if (opaque(x)) {
300 A y;
301 A z;
302
303 // CHECK: invoke void @_ZN6test121AD1Ev([[A]]* [[Z]])
304 // CHECK: invoke void @_ZN6test121AD1Ev([[A]]* [[Y]])
305 // CHECK-NOT: switch
306 goto success;
307 }
308
309 success:
310 bool _ = true;
311
312 // CHECK: call void @_ZN6test121AD1Ev([[A]]* [[X]])
313 // CHECK-NEXT: ret void
314 }
315 }
316
317 // Reduced from some TableGen code that was causing a self-host crash.
318 namespace test13 {
319 struct A { ~A(); };
320
test0(int x)321 void test0(int x) {
322 try {
323 switch (x) {
324 case 0:
325 break;
326 case 1:{
327 A a;
328 break;
329 }
330 default:
331 return;
332 }
333 return;
334 } catch (int x) {
335 }
336 return;
337 }
338
test1(int x)339 void test1(int x) {
340 A y;
341 try {
342 switch (x) {
343 default: break;
344 }
345 } catch (int x) {}
346 }
347 }
348
349 // rdar://problem/8231514
350 namespace test14 {
351 struct A { ~A(); };
352 struct B { ~B(); };
353
354 B b();
355 void opaque();
356
foo()357 void foo() {
358 A a;
359 try {
360 B str = b();
361 opaque();
362 } catch (int x) {
363 }
364 }
365 }
366
367 // rdar://problem/8231514
368 // JumpDests shouldn't get confused by scopes that aren't normal cleanups.
369 namespace test15 {
370 struct A { ~A(); };
371
372 bool opaque(int);
373
374 // CHECK: define void @_ZN6test153fooEv()
foo()375 void foo() {
376 A a;
377
378 try {
379 // CHECK: [[X:%.*]] = alloca i32
380 // CHECK: store i32 10, i32* [[X]]
381 // CHECK-NEXT: br label
382 // -> while.cond
383 int x = 10;
384
385 while (true) {
386 // CHECK: load i32* [[X]]
387 // CHECK-NEXT: [[COND:%.*]] = invoke zeroext i1 @_ZN6test156opaqueEi
388 // CHECK: br i1 [[COND]]
389 if (opaque(x))
390 // CHECK: br label
391 break;
392
393 // CHECK: br label
394 }
395 // CHECK: br label
396 } catch (int x) { }
397
398 // CHECK: call void @_ZN6test151AD1Ev
399 }
400 }
401
402 namespace test16 {
403 struct A { A(); ~A() noexcept(false); };
404 struct B { int x; B(const A &); ~B() noexcept(false); };
405 void foo();
406 bool cond();
407
408 // CHECK: define void @_ZN6test163barEv()
bar()409 void bar() {
410 // CHECK: [[EXN_SAVE:%.*]] = alloca i8*
411 // CHECK-NEXT: [[EXN_ACTIVE:%.*]] = alloca i1
412 // CHECK-NEXT: [[TEMP:%.*]] = alloca [[A:%.*]],
413 // CHECK-NEXT: [[EXNSLOT:%.*]] = alloca i8*
414 // CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
415 // CHECK-NEXT: [[TEMP_ACTIVE:%.*]] = alloca i1
416
417 cond() ? throw B(A()) : foo();
418
419 // CHECK-NEXT: [[COND:%.*]] = call zeroext i1 @_ZN6test164condEv()
420 // CHECK-NEXT: store i1 false, i1* [[EXN_ACTIVE]]
421 // CHECK-NEXT: store i1 false, i1* [[TEMP_ACTIVE]]
422 // CHECK-NEXT: br i1 [[COND]],
423
424 // CHECK: [[EXN:%.*]] = call i8* @__cxa_allocate_exception(i64 4)
425 // CHECK-NEXT: store i8* [[EXN]], i8** [[EXN_SAVE]]
426 // CHECK-NEXT: store i1 true, i1* [[EXN_ACTIVE]]
427 // CHECK-NEXT: [[T0:%.*]] = bitcast i8* [[EXN]] to [[B:%.*]]*
428 // CHECK-NEXT: invoke void @_ZN6test161AC1Ev([[A]]* [[TEMP]])
429 // CHECK: store i1 true, i1* [[TEMP_ACTIVE]]
430 // CHECK-NEXT: invoke void @_ZN6test161BC1ERKNS_1AE([[B]]* [[T0]], [[A]]* [[TEMP]])
431 // CHECK: store i1 false, i1* [[EXN_ACTIVE]]
432 // CHECK-NEXT: invoke void @__cxa_throw(i8* [[EXN]],
433
434 // CHECK: invoke void @_ZN6test163fooEv()
435 // CHECK: br label
436
437 // CHECK: invoke void @_ZN6test161AD1Ev([[A]]* [[TEMP]])
438 // CHECK: ret void
439
440 // CHECK: [[T0:%.*]] = load i1* [[EXN_ACTIVE]]
441 // CHECK-NEXT: br i1 [[T0]]
442 // CHECK: [[T1:%.*]] = load i8** [[EXN_SAVE]]
443 // CHECK-NEXT: call void @__cxa_free_exception(i8* [[T1]])
444 // CHECK-NEXT: br label
445 }
446 }
447