1 // RUN: %clang_cc1 -std=c++11 -fsanitize=signed-integer-overflow,integer-divide-by-zero,float-divide-by-zero,shift-base,shift-exponent,unreachable,return,vla-bound,alignment,null,vptr,object-size,float-cast-overflow,bool,enum,array-bounds,function -fsanitize-recover=signed-integer-overflow,integer-divide-by-zero,float-divide-by-zero,shift-base,shift-exponent,vla-bound,alignment,null,vptr,object-size,float-cast-overflow,bool,enum,array-bounds,function -emit-llvm %s -o - -triple x86_64-linux-gnu | opt -instnamer -S | FileCheck %s
2 // RUN: %clang_cc1 -std=c++11 -fsanitize=vptr,address -fsanitize-recover=vptr,address -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-ASAN
3 // RUN: %clang_cc1 -std=c++11 -fsanitize=vptr -fsanitize-recover=vptr -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=DOWNCAST-NULL
4 // RUN: %clang_cc1 -std=c++11 -fsanitize=function -emit-llvm %s -o - -triple x86_64-linux-gnux32 | FileCheck %s --check-prefix=CHECK-X32
5 // RUN: %clang_cc1 -std=c++11 -fsanitize=function -emit-llvm %s -o - -triple i386-linux-gnu | FileCheck %s --check-prefix=CHECK-X86
6 
7 struct S {
8   double d;
9   int a, b;
10   virtual int f();
11 };
12 
13 // Check that type descriptor global is not modified by ASan.
14 // CHECK-ASAN: [[TYPE_DESCR:@[0-9]+]] = private unnamed_addr constant { i16, i16, [4 x i8] } { i16 -1, i16 0, [4 x i8] c"'S'\00" }
15 
16 // Check that type mismatch handler is not modified by ASan.
17 // CHECK-ASAN: private unnamed_addr global { { [{{.*}} x i8]*, i32, i32 }, { i16, i16, [4 x i8] }*, i8*, i8 } { {{.*}}, { i16, i16, [4 x i8] }* [[TYPE_DESCR]], {{.*}} }
18 
19 struct T : S {};
20 
21 // CHECK-LABEL: @_Z17reference_binding
reference_binding(int * p,S * q)22 void reference_binding(int *p, S *q) {
23   // C++ core issue 453: If an lvalue to which a reference is directly bound
24   // designates neither an existing object or function of an appropriate type,
25   // nor a region of storage of suitable size and alignment to contain an object
26   // of the reference's type, the behavior is undefined.
27 
28   // CHECK: icmp ne {{.*}}, null
29 
30   // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64
31   // CHECK-NEXT: icmp uge i64 %[[SIZE]], 4
32 
33   // CHECK: %[[PTRINT:.*]] = ptrtoint
34   // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3
35   // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0
36   int &r = *p;
37 
38   // A reference is not required to refer to an object within its lifetime.
39   // CHECK-NOT: __ubsan_handle_dynamic_type_cache_miss
40   S &r2 = *q;
41 }
42 
43 // CHECK-LABEL: @_Z13member_access
44 // CHECK-ASAN-LABEL: @_Z13member_access
member_access(S * p)45 void member_access(S *p) {
46   // (1a) Check 'p' is appropriately sized and aligned for member access.
47 
48   // CHECK: icmp ne {{.*}}, null
49 
50   // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64
51   // CHECK-NEXT: icmp uge i64 %[[SIZE]], 24
52 
53   // CHECK: %[[PTRINT:.*]] = ptrtoint
54   // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 7
55   // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0
56 
57   // (1b) Check that 'p' actually points to an 'S'.
58 
59   // CHECK: %[[VPTRADDR:.*]] = bitcast {{.*}} to i64*
60   // CHECK-NEXT: %[[VPTR:.*]] = load i64, i64* %[[VPTRADDR]]
61   //
62   // hash_16_bytes:
63   //
64   // If this number changes, it indicates that either the mangled name of ::S
65   // has changed, or that LLVM's hashing function has changed. The latter case
66   // is OK if the hashing function is still stable.
67   //
68   // The two hash values are for 64- and 32-bit Clang binaries, respectively.
69   // FIXME: We should produce a 64-bit value either way.
70   //
71   // CHECK-NEXT: xor i64 {{-4030275160588942838|2562089159}}, %[[VPTR]]
72   // CHECK-NEXT: mul i64 {{.*}}, -7070675565921424023
73   // CHECK-NEXT: lshr i64 {{.*}}, 47
74   // CHECK-NEXT: xor i64
75   // CHECK-NEXT: xor i64 %[[VPTR]]
76   // CHECK-NEXT: mul i64 {{.*}}, -7070675565921424023
77   // CHECK-NEXT: lshr i64 {{.*}}, 47
78   // CHECK-NEXT: xor i64
79   // CHECK-NEXT: %[[HASH:.*]] = mul i64 {{.*}}, -7070675565921424023
80   //
81   // Check the hash against the table:
82   //
83   // CHECK-NEXT: %[[IDX:.*]] = and i64 %{{.*}}, 127
84   // CHECK-NEXT: getelementptr inbounds [128 x i64], [128 x i64]* @__ubsan_vptr_type_cache, i32 0, i64 %[[IDX]]
85   // CHECK-NEXT: %[[CACHEVAL:.*]] = load i64, i64*
86   // CHECK-NEXT: icmp eq i64 %[[CACHEVAL]], %[[HASH]]
87   // CHECK-NEXT: br i1
88 
89   // CHECK: call void @__ubsan_handle_dynamic_type_cache_miss({{.*}}, i64 %{{.*}}, i64 %[[HASH]])
90   // CHECK-NOT: unreachable
91   // CHECK: {{.*}}:
92 
93   // (2) Check 'p->b' is appropriately sized and aligned for a load.
94 
95   // FIXME: Suppress this in the trivial case of a member access, because we
96   // know we've just checked the member access expression itself.
97 
98   // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64
99   // CHECK-NEXT: icmp uge i64 %[[SIZE]], 4
100 
101   // CHECK: %[[PTRINT:.*]] = ptrtoint
102   // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3
103   // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0
104   int k = p->b;
105 
106   // (3a) Check 'p' is appropriately sized and aligned for member function call.
107 
108   // CHECK: icmp ne {{.*}}, null
109 
110   // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64
111   // CHECK-NEXT: icmp uge i64 %[[SIZE]], 24
112 
113   // CHECK: %[[PTRINT:.*]] = ptrtoint
114   // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 7
115   // CHECK-NEXT: icmp eq i64 %[[MISALIGN]], 0
116 
117   // (3b) Check that 'p' actually points to an 'S'
118 
119   // CHECK: load i64, i64*
120   // CHECK-NEXT: xor i64 {{-4030275160588942838|2562089159}},
121   // [...]
122   // CHECK: getelementptr inbounds [128 x i64], [128 x i64]* @__ubsan_vptr_type_cache, i32 0, i64 %
123   // CHECK: br i1
124   // CHECK: call void @__ubsan_handle_dynamic_type_cache_miss({{.*}}, i64 %{{.*}}, i64 %{{.*}})
125   // CHECK-NOT: unreachable
126   // CHECK: {{.*}}:
127 
128   k = p->f();
129 }
130 
131 // CHECK-LABEL: @_Z12lsh_overflow
lsh_overflow(int a,int b)132 int lsh_overflow(int a, int b) {
133   // CHECK: %[[RHS_INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31
134   // CHECK-NEXT: br i1 %[[RHS_INBOUNDS]], label %[[CHECK_BB:.*]], label %[[CONT_BB:.*]],
135 
136   // CHECK:      [[CHECK_BB]]:
137   // CHECK-NEXT: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]]
138   // CHECK-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]]
139 
140   // This is present for C++11 but not for C: C++ core issue 1457 allows a '1'
141   // to be shifted into the sign bit, but not out of it.
142   // CHECK-NEXT: %[[SHIFTED_OUT_NOT_SIGN:.*]] = lshr i32 %[[SHIFTED_OUT]], 1
143 
144   // CHECK-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT_NOT_SIGN]], 0
145   // CHECK-NEXT: br label %[[CONT_BB]]
146 
147   // CHECK:      [[CONT_BB]]:
148   // CHECK-NEXT: %[[VALID_BASE:.*]] = phi i1 [ true, {{.*}} ], [ %[[NO_OVERFLOW]], %[[CHECK_BB]] ]
149   // CHECK-NEXT: %[[VALID:.*]] = and i1 %[[RHS_INBOUNDS]], %[[VALID_BASE]]
150   // CHECK-NEXT: br i1 %[[VALID]]
151 
152   // CHECK: call void @__ubsan_handle_shift_out_of_bounds
153   // CHECK-NOT: call void @__ubsan_handle_shift_out_of_bounds
154 
155   // CHECK: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]]
156   // CHECK-NEXT: ret i32 %[[RET]]
157   return a << b;
158 }
159 
160 // CHECK-LABEL: @_Z9no_return
no_return()161 int no_return() {
162   // CHECK:      call void @__ubsan_handle_missing_return(i8* bitcast ({{.*}}* @{{.*}} to i8*)) [[NR_NUW:#[0-9]+]]
163   // CHECK-NEXT: unreachable
164 }
165 
166 // CHECK-LABEL: @_Z9sour_bool
sour_bool(bool * p)167 bool sour_bool(bool *p) {
168   // CHECK: %[[OK:.*]] = icmp ule i8 {{.*}}, 1
169   // CHECK: br i1 %[[OK]]
170   // CHECK: call void @__ubsan_handle_load_invalid_value(i8* bitcast ({{.*}}), i64 {{.*}})
171   return *p;
172 }
173 
174 enum E1 { e1a = 0, e1b = 127 } e1;
175 enum E2 { e2a = -1, e2b = 64 } e2;
176 enum E3 { e3a = (1u << 31) - 1 } e3;
177 
178 // CHECK-LABEL: @_Z14bad_enum_value
bad_enum_value()179 int bad_enum_value() {
180   // CHECK: %[[E1:.*]] = icmp ule i32 {{.*}}, 127
181   // CHECK: br i1 %[[E1]]
182   // CHECK: call void @__ubsan_handle_load_invalid_value(
183   int a = e1;
184 
185   // CHECK: %[[E2HI:.*]] = icmp sle i32 {{.*}}, 127
186   // CHECK: %[[E2LO:.*]] = icmp sge i32 {{.*}}, -128
187   // CHECK: %[[E2:.*]] = and i1 %[[E2HI]], %[[E2LO]]
188   // CHECK: br i1 %[[E2]]
189   // CHECK: call void @__ubsan_handle_load_invalid_value(
190   int b = e2;
191 
192   // CHECK: %[[E3:.*]] = icmp ule i32 {{.*}}, 2147483647
193   // CHECK: br i1 %[[E3]]
194   // CHECK: call void @__ubsan_handle_load_invalid_value(
195   int c = e3;
196   return a + b + c;
197 }
198 
199 // CHECK-LABEL: @_Z20bad_downcast_pointer
200 // DOWNCAST-NULL-LABEL: @_Z20bad_downcast_pointer
bad_downcast_pointer(S * p)201 void bad_downcast_pointer(S *p) {
202   // CHECK: %[[NONNULL:.*]] = icmp ne {{.*}}, null
203   // CHECK: br i1 %[[NONNULL]],
204 
205   // A null poiner access is guarded without -fsanitize=null.
206   // DOWNCAST-NULL: %[[NONNULL:.*]] = icmp ne {{.*}}, null
207   // DOWNCAST-NULL: br i1 %[[NONNULL]],
208 
209   // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8(
210   // CHECK: %[[E1:.*]] = icmp uge i64 %[[SIZE]], 24
211   // CHECK: %[[MISALIGN:.*]] = and i64 %{{.*}}, 7
212   // CHECK: %[[E2:.*]] = icmp eq i64 %[[MISALIGN]], 0
213   // CHECK: %[[E12:.*]] = and i1 %[[E1]], %[[E2]]
214   // CHECK: br i1 %[[E12]],
215 
216   // CHECK: call void @__ubsan_handle_type_mismatch
217   // CHECK: br label
218 
219   // CHECK: br i1 %{{.*}},
220 
221   // CHECK: call void @__ubsan_handle_dynamic_type_cache_miss
222   // CHECK: br label
223   (void) static_cast<T*>(p);
224 }
225 
226 // CHECK-LABEL: @_Z22bad_downcast_reference
bad_downcast_reference(S & p)227 void bad_downcast_reference(S &p) {
228   // CHECK: %[[E1:.*]] = icmp ne {{.*}}, null
229   // CHECK-NOT: br i1
230 
231   // CHECK: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8(
232   // CHECK: %[[E2:.*]] = icmp uge i64 %[[SIZE]], 24
233 
234   // CHECK: %[[MISALIGN:.*]] = and i64 %{{.*}}, 7
235   // CHECK: %[[E3:.*]] = icmp eq i64 %[[MISALIGN]], 0
236 
237   // CHECK: %[[E12:.*]] = and i1 %[[E1]], %[[E2]]
238   // CHECK: %[[E123:.*]] = and i1 %[[E12]], %[[E3]]
239   // CHECK: br i1 %[[E123]],
240 
241   // CHECK: call void @__ubsan_handle_type_mismatch
242   // CHECK: br label
243 
244   // CHECK: br i1 %{{.*}},
245 
246   // CHECK: call void @__ubsan_handle_dynamic_type_cache_miss
247   // CHECK: br label
248   (void) static_cast<T&>(p);
249 }
250 
251 // CHECK-LABEL: @_Z11array_index
array_index(const int (& a)[4],int n)252 int array_index(const int (&a)[4], int n) {
253   // CHECK: %[[K1_OK:.*]] = icmp ult i64 %{{.*}}, 4
254   // CHECK: br i1 %[[K1_OK]]
255   // CHECK: call void @__ubsan_handle_out_of_bounds(
256   int k1 = a[n];
257 
258   // CHECK: %[[R1_OK:.*]] = icmp ule i64 %{{.*}}, 4
259   // CHECK: br i1 %[[R1_OK]]
260   // CHECK: call void @__ubsan_handle_out_of_bounds(
261   const int *r1 = &a[n];
262 
263   // CHECK: %[[K2_OK:.*]] = icmp ult i64 %{{.*}}, 8
264   // CHECK: br i1 %[[K2_OK]]
265   // CHECK: call void @__ubsan_handle_out_of_bounds(
266   int k2 = ((const int(&)[8])a)[n];
267 
268   // CHECK: %[[K3_OK:.*]] = icmp ult i64 %{{.*}}, 4
269   // CHECK: br i1 %[[K3_OK]]
270   // CHECK: call void @__ubsan_handle_out_of_bounds(
271   int k3 = n[a];
272 
273   return k1 + *r1 + k2;
274 }
275 
276 // CHECK-LABEL: @_Z17multi_array_index
multi_array_index(int n,int m)277 int multi_array_index(int n, int m) {
278   int arr[4][6];
279 
280   // CHECK: %[[IDX2_OK:.*]] = icmp ult i64 %{{.*}}, 6
281   // CHECK: br i1 %[[IDX2_OK]]
282   // CHECK: call void @__ubsan_handle_out_of_bounds(
283 
284   // CHECK: %[[IDX1_OK:.*]] = icmp ult i64 %{{.*}}, 4
285   // CHECK: br i1 %[[IDX1_OK]]
286   // CHECK: call void @__ubsan_handle_out_of_bounds(
287   return arr[n][m];
288 }
289 
290 // CHECK-LABEL: @_Z11array_arith
array_arith(const int (& a)[4],int n)291 int array_arith(const int (&a)[4], int n) {
292   // CHECK: %[[K1_OK:.*]] = icmp ule i64 %{{.*}}, 4
293   // CHECK: br i1 %[[K1_OK]]
294   // CHECK: call void @__ubsan_handle_out_of_bounds(
295   const int *k1 = a + n;
296 
297   // CHECK: %[[K2_OK:.*]] = icmp ule i64 %{{.*}}, 8
298   // CHECK: br i1 %[[K2_OK]]
299   // CHECK: call void @__ubsan_handle_out_of_bounds(
300   const int *k2 = (const int(&)[8])a + n;
301 
302   return *k1 + *k2;
303 }
304 
305 struct ArrayMembers {
306   int a1[5];
307   int a2[1];
308 };
309 // CHECK-LABEL: @_Z18struct_array_index
struct_array_index(ArrayMembers * p,int n)310 int struct_array_index(ArrayMembers *p, int n) {
311   // CHECK: %[[IDX_OK:.*]] = icmp ult i64 %{{.*}}, 5
312   // CHECK: br i1 %[[IDX_OK]]
313   // CHECK: call void @__ubsan_handle_out_of_bounds(
314   return p->a1[n];
315 }
316 
317 // CHECK-LABEL: @_Z16flex_array_index
flex_array_index(ArrayMembers * p,int n)318 int flex_array_index(ArrayMembers *p, int n) {
319   // CHECK-NOT: call void @__ubsan_handle_out_of_bounds(
320   return p->a2[n];
321 }
322 
323 extern int incomplete[];
324 // CHECK-LABEL: @_Z22incomplete_array_index
incomplete_array_index(int n)325 int incomplete_array_index(int n) {
326   // CHECK-NOT: call void @__ubsan_handle_out_of_bounds(
327   return incomplete[n];
328 }
329 
330 typedef __attribute__((ext_vector_type(4))) int V4I;
331 // CHECK-LABEL: @_Z12vector_index
vector_index(V4I v,int n)332 int vector_index(V4I v, int n) {
333   // CHECK: %[[IDX_OK:.*]] = icmp ult i64 %{{.*}}, 4
334   // CHECK: br i1 %[[IDX_OK]]
335   // CHECK: call void @__ubsan_handle_out_of_bounds(
336   return v[n];
337 }
338 
339 // CHECK-LABEL: @_Z12string_index
string_index(int n)340 char string_index(int n) {
341   // CHECK: %[[IDX_OK:.*]] = icmp ult i64 %{{.*}}, 6
342   // CHECK: br i1 %[[IDX_OK]]
343   // CHECK: call void @__ubsan_handle_out_of_bounds(
344   return "Hello"[n];
345 }
346 
347 class A // align=4
348 {
349   int a1, a2, a3;
350 };
351 
352 class B // align=8
353 {
354   long b1, b2;
355 };
356 
357 class C : public A, public B // align=16
358 {
359   alignas(16) int c1;
360 };
361 
362 // Make sure we check the alignment of the pointer after subtracting any
363 // offset. The pointer before subtraction doesn't need to be aligned for
364 // the destination type.
365 
366 // CHECK-LABEL: define void @_Z16downcast_pointerP1B(%class.B* %b)
downcast_pointer(B * b)367 void downcast_pointer(B *b) {
368   (void) static_cast<C*>(b);
369   // Alignment check from EmitTypeCheck(TCK_DowncastPointer, ...)
370   // CHECK: [[SUB:%[.a-z0-9]*]] = getelementptr i8, i8* {{.*}}, i64 -16
371   // CHECK-NEXT: [[C:%.+]] = bitcast i8* [[SUB]] to %class.C*
372   // null check goes here
373   // CHECK: [[FROM_PHI:%.+]] = phi %class.C* [ [[C]], {{.*}} ], {{.*}}
374   // Objectsize check goes here
375   // CHECK: [[C_INT:%.+]] = ptrtoint %class.C* [[FROM_PHI]] to i64
376   // CHECK-NEXT: [[MASKED:%.+]] = and i64 [[C_INT]], 15
377   // CHECK-NEXT: [[TEST:%.+]] = icmp eq i64 [[MASKED]], 0
378   // AND the alignment test with the objectsize test.
379   // CHECK-NEXT: [[AND:%.+]] = and i1 {{.*}}, [[TEST]]
380   // CHECK-NEXT: br i1 [[AND]]
381 }
382 
383 // CHECK-LABEL: define void @_Z18downcast_referenceR1B(%class.B* dereferenceable({{[0-9]+}}) %b)
downcast_reference(B & b)384 void downcast_reference(B &b) {
385   (void) static_cast<C&>(b);
386   // Alignment check from EmitTypeCheck(TCK_DowncastReference, ...)
387   // CHECK:      [[SUB:%[.a-z0-9]*]] = getelementptr i8, i8* {{.*}}, i64 -16
388   // CHECK-NEXT: [[C:%.+]] = bitcast i8* [[SUB]] to %class.C*
389   // Objectsize check goes here
390   // CHECK:      [[C_INT:%.+]] = ptrtoint %class.C* [[C]] to i64
391   // CHECK-NEXT: [[MASKED:%.+]] = and i64 [[C_INT]], 15
392   // CHECK-NEXT: [[TEST:%.+]] = icmp eq i64 [[MASKED]], 0
393   // AND the alignment test with the objectsize test.
394   // CHECK:      [[AND:%.+]] = and i1 {{.*}}, [[TEST]]
395   // CHECK-NEXT: br i1 [[AND]]
396 }
397 
398 // CHECK-LABEL: @_Z22indirect_function_callPFviE({{.*}} prologue <{ i32, i8* }> <{ i32 1413876459, i8* bitcast ({ i8*, i8* }* @_ZTIFvPFviEE to i8*) }>
399 // CHECK-X32: @_Z22indirect_function_callPFviE({{.*}} prologue <{ i32, i8* }> <{ i32 1413875435, i8* bitcast ({ i8*, i8* }* @_ZTIFvPFviEE to i8*) }>
400 // CHECK-X86: @_Z22indirect_function_callPFviE({{.*}} prologue <{ i32, i8* }> <{ i32 1413875435, i8* bitcast ({ i8*, i8* }* @_ZTIFvPFviEE to i8*) }>
indirect_function_call(void (* p)(int))401 void indirect_function_call(void (*p)(int)) {
402   // CHECK: [[PTR:%.+]] = bitcast void (i32)* {{.*}} to <{ i32, i8* }>*
403 
404   // Signature check
405   // CHECK-NEXT: [[SIGPTR:%.+]] = getelementptr <{ i32, i8* }>, <{ i32, i8* }>* [[PTR]], i32 0, i32 0
406   // CHECK-NEXT: [[SIG:%.+]] = load i32, i32* [[SIGPTR]]
407   // CHECK-NEXT: [[SIGCMP:%.+]] = icmp eq i32 [[SIG]], 1413876459
408   // CHECK-NEXT: br i1 [[SIGCMP]]
409 
410   // RTTI pointer check
411   // CHECK: [[RTTIPTR:%.+]] = getelementptr <{ i32, i8* }>, <{ i32, i8* }>* [[PTR]], i32 0, i32 1
412   // CHECK-NEXT: [[RTTI:%.+]] = load i8*, i8** [[RTTIPTR]]
413   // CHECK-NEXT: [[RTTICMP:%.+]] = icmp eq i8* [[RTTI]], bitcast ({ i8*, i8* }* @_ZTIFviE to i8*)
414   // CHECK-NEXT: br i1 [[RTTICMP]]
415   p(42);
416 }
417 
418 namespace UpcastPointerTest {
419 struct S {};
420 struct T : S { double d; };
421 struct V : virtual S {};
422 
423 // CHECK-LABEL: upcast_pointer
upcast_pointer(T * t)424 S* upcast_pointer(T* t) {
425   // Check for null pointer
426   // CHECK: %[[NONNULL:.*]] = icmp ne {{.*}}, null
427   // CHECK: br i1 %[[NONNULL]]
428 
429   // Check alignment
430   // CHECK: %[[MISALIGN:.*]] = and i64 %{{.*}}, 7
431   // CHECK: icmp eq i64 %[[MISALIGN]], 0
432 
433   // CHECK: call void @__ubsan_handle_type_mismatch
434   return t;
435 }
436 
437 V getV();
438 
439 // CHECK-LABEL: upcast_to_vbase
upcast_to_vbase()440 void upcast_to_vbase() {
441   // No need to check for null here, as we have a temporary here.
442 
443   // CHECK-NOT: br i1
444 
445   // CHECK: call i64 @llvm.objectsize
446   // CHECK: call void @__ubsan_handle_type_mismatch
447   // CHECK: call void @__ubsan_handle_dynamic_type_cache_miss
448   const S& s = getV();
449 }
450 }
451 
452 namespace CopyValueRepresentation {
453   // CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S3aSERKS0_
454   // CHECK-NOT: call {{.*}} @__ubsan_handle_load_invalid_value
455   // CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S4aSEOS0_
456   // CHECK-NOT: call {{.*}} @__ubsan_handle_load_invalid_value
457   // CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S1C2ERKS0_
458   // CHECK-NOT: call {{.*}} __ubsan_handle_load_invalid_value
459   // CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S2C2ERKS0_
460   // CHECK: __ubsan_handle_load_invalid_value
461   // CHECK-LABEL: define {{.*}} @_ZN23CopyValueRepresentation2S5C2ERKS0_
462   // CHECK-NOT: call {{.*}} __ubsan_handle_load_invalid_value
463 
464   struct CustomCopy { CustomCopy(); CustomCopy(const CustomCopy&); };
465   struct S1 {
466     CustomCopy CC;
467     bool b;
468   };
469   void callee1(S1);
test1()470   void test1() {
471     S1 s11;
472     callee1(s11);
473     S1 s12;
474     s12 = s11;
475   }
476 
477   static bool some_global_bool;
478   struct ExprCopy {
479     ExprCopy();
480     ExprCopy(const ExprCopy&, bool b = some_global_bool);
481   };
482   struct S2 {
483     ExprCopy EC;
484     bool b;
485   };
486   void callee2(S2);
test2(void)487   void test2(void) {
488     S2 s21;
489     callee2(s21);
490     S2 s22;
491     s22 = s21;
492   }
493 
494   struct CustomAssign { CustomAssign &operator=(const CustomAssign&); };
495   struct S3 {
496     CustomAssign CA;
497     bool b;
498   };
test3()499   void test3() {
500     S3 x, y;
501     x = y;
502   }
503 
504   struct CustomMove {
505     CustomMove();
506     CustomMove(const CustomMove&&);
507     CustomMove &operator=(const CustomMove&&);
508   };
509   struct S4 {
510     CustomMove CM;
511     bool b;
512   };
test4()513   void test4() {
514     S4 x, y;
515     x = static_cast<S4&&>(y);
516   }
517 
518   struct EnumCustomCopy {
519     EnumCustomCopy();
520     EnumCustomCopy(const EnumCustomCopy&);
521   };
522   struct S5 {
523     EnumCustomCopy ECC;
524     bool b;
525   };
526   void callee5(S5);
test5()527   void test5() {
528     S5 s51;
529     callee5(s51);
530     S5 s52;
531     s52 = s51;
532   }
533 }
534 
535 // CHECK: attributes [[NR_NUW]] = { noreturn nounwind }
536