1 // RUN: %clang_cc1 -fsanitize=alignment,null,object-size,shift-base,shift-exponent,return,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -fsanitize-recover=alignment,null,object-size,shift-base,shift-exponent,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -emit-llvm %s -o - -triple x86_64-linux-gnu | opt -instnamer -S | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-UBSAN 2 // RUN: %clang_cc1 -fsanitize-trap=alignment,null,object-size,shift-base,shift-exponent,return,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -fsanitize-recover=alignment,null,object-size,shift-base,shift-exponent,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -fsanitize=alignment,null,object-size,shift-base,shift-exponent,return,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -fsanitize-recover=alignment,null,object-size,shift-base,shift-exponent,signed-integer-overflow,vla-bound,float-cast-overflow,integer-divide-by-zero,bool,returns-nonnull-attribute,nonnull-attribute -emit-llvm %s -o - -triple x86_64-linux-gnu | opt -instnamer -S | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-TRAP 3 // RUN: %clang_cc1 -fsanitize=signed-integer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-OVERFLOW 4 5 // CHECK-UBSAN: @[[INT:.*]] = private unnamed_addr constant { i16, i16, [6 x i8] } { i16 0, i16 11, [6 x i8] c"'int'\00" } 6 7 // FIXME: When we only emit each type once, use [[INT]] more below. 8 // CHECK-UBSAN: @[[LINE_100:.*]] = private unnamed_addr global {{.*}}, i32 100, i32 5 {{.*}} @[[INT]], i8 2, i8 1 9 // CHECK-UBSAN: @[[LINE_200:.*]] = {{.*}}, i32 200, i32 10 {{.*}}, i8 2, i8 0 10 // CHECK-UBSAN: @[[LINE_300:.*]] = {{.*}}, i32 300, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} 11 // CHECK-UBSAN: @[[LINE_400:.*]] = {{.*}}, i32 400, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} 12 // CHECK-UBSAN: @[[LINE_500:.*]] = {{.*}}, i32 500, i32 10 {{.*}} @{{.*}}, i8 2, i8 0 } 13 // CHECK-UBSAN: @[[LINE_600:.*]] = {{.*}}, i32 600, i32 3 {{.*}} @{{.*}}, i8 2, i8 1 } 14 15 // CHECK-UBSAN: @[[STRUCT_S:.*]] = private unnamed_addr constant { i16, i16, [11 x i8] } { i16 -1, i16 0, [11 x i8] c"'struct S'\00" } 16 17 // CHECK-UBSAN: @[[LINE_700:.*]] = {{.*}}, i32 700, i32 14 {{.*}} @[[STRUCT_S]], i8 2, i8 3 } 18 // CHECK-UBSAN: @[[LINE_800:.*]] = {{.*}}, i32 800, i32 12 {{.*}} @{{.*}} } 19 // CHECK-UBSAN: @[[LINE_900:.*]] = {{.*}}, i32 900, i32 11 {{.*}} @{{.*}} } 20 // CHECK-UBSAN: @[[LINE_1000:.*]] = {{.*}}, i32 1000, i32 10 {{.*}} @{{.*}} } 21 // CHECK-UBSAN: @[[FP16:.*]] = private unnamed_addr constant { i16, i16, [9 x i8] } { i16 1, i16 16, [9 x i8] c"'__fp16'\00" } 22 // CHECK-UBSAN: @[[LINE_1100:.*]] = {{.*}}, i32 1100, i32 8 {{.*}} @{{.*}} } 23 // CHECK-UBSAN: @[[LINE_1200:.*]] = {{.*}}, i32 1200, i32 10 {{.*}} @{{.*}} } 24 // CHECK-UBSAN: @[[LINE_1300:.*]] = {{.*}}, i32 1300, i32 10 {{.*}} @{{.*}} } 25 // CHECK-UBSAN: @[[LINE_1400:.*]] = {{.*}}, i32 1400, i32 10 {{.*}} @{{.*}} } 26 // Make sure we check the fp16 type_mismatch data so we can easily match the signed char float_cast_overflow 27 // CHECK-UBSAN: @[[LINE_1500:.*]] = {{.*}}, i32 1500, i32 10 {{.*}} @[[FP16]], {{.*}} } 28 // CHECK-UBSAN: @[[SCHAR:.*]] = private unnamed_addr constant { i16, i16, [14 x i8] } { i16 0, i16 7, [14 x i8] c"'signed char'\00" } 29 // CHECK-UBSAN: @[[LINE_1500:.*]] = {{.*}}, i32 1500, i32 10 {{.*}} @[[FP16]], {{.*}} } 30 // CHECK-UBSAN: @[[LINE_1600:.*]] = {{.*}}, i32 1600, i32 10 {{.*}} @{{.*}} } 31 32 // PR6805 33 // CHECK-COMMON-LABEL: @foo 34 void foo() { 35 union { int i; } u; 36 37 // CHECK-COMMON: %[[I8PTR:.*]] = bitcast i32* %[[PTR:.*]] to i8* 38 // CHECK-COMMON-NEXT: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8(i8* %[[I8PTR]], i1 false, i1 false) 39 // CHECK-COMMON-NEXT: %[[OK:.*]] = icmp uge i64 %[[SIZE]], 4 40 41 // CHECK-UBSAN: br i1 %[[OK]], {{.*}} !prof ![[WEIGHT_MD:.*]], !nosanitize 42 // CHECK-TRAP: br i1 %[[OK]], {{.*}} 43 44 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint {{.*}} %[[PTR]] to i64 45 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), i64 %[[ARG]]) 46 47 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW:#[0-9]+]] 48 // CHECK-TRAP-NEXT: unreachable 49 #line 100 50 u.i=1; 51 } 52 53 // CHECK-COMMON-LABEL: @bar 54 int bar(int *a) { 55 // CHECK-COMMON: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 56 // CHECK-COMMON-NEXT: icmp uge i64 %[[SIZE]], 4 57 58 // CHECK-COMMON: %[[PTRINT:.*]] = ptrtoint 59 // CHECK-COMMON-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3 60 // CHECK-COMMON-NEXT: icmp eq i64 %[[MISALIGN]], 0 61 62 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({{.*}} @[[LINE_200]] to i8*), i64 %[[PTRINT]]) 63 64 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 65 // CHECK-TRAP-NEXT: unreachable 66 67 #line 200 68 return *a; 69 } 70 71 // CHECK-UBSAN-LABEL: @addr_space 72 int addr_space(int __attribute__((address_space(256))) *a) { 73 // CHECK-UBSAN-NOT: __ubsan 74 return *a; 75 } 76 77 // CHECK-COMMON-LABEL: @lsh_overflow 78 int lsh_overflow(int a, int b) { 79 // CHECK-COMMON: %[[RHS_INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 80 // CHECK-COMMON-NEXT: br i1 %[[RHS_INBOUNDS]], label %[[CHECK_BB:.*]], label %[[CONT_BB:.*]], 81 82 // CHECK-COMMON: [[CHECK_BB]]: 83 // CHECK-COMMON-NEXT: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]] 84 // CHECK-COMMON-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]] 85 // CHECK-COMMON-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT]], 0 86 // CHECK-COMMON-NEXT: br label %[[CONT_BB]] 87 88 // CHECK-COMMON: [[CONT_BB]]: 89 // CHECK-COMMON-NEXT: %[[VALID_BASE:.*]] = phi i1 [ true, {{.*}} ], [ %[[NO_OVERFLOW]], %[[CHECK_BB]] ] 90 // CHECK-COMMON-NEXT: %[[VALID:.*]] = and i1 %[[RHS_INBOUNDS]], %[[VALID_BASE]] 91 92 // CHECK-UBSAN: br i1 %[[VALID]], {{.*}} !prof ![[WEIGHT_MD]] 93 // CHECK-TRAP: br i1 %[[VALID]] 94 95 // CHECK-UBSAN: %[[ARG1:.*]] = zext 96 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 97 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_300]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 98 // CHECK-UBSAN-NOT: call void @__ubsan_handle_shift_out_of_bounds 99 100 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 101 // CHECK-TRAP: unreachable 102 // CHECK-TRAP-NOT: call void @llvm.trap() 103 104 // CHECK-COMMON: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]] 105 // CHECK-COMMON-NEXT: ret i32 %[[RET]] 106 #line 300 107 return a << b; 108 } 109 110 // CHECK-COMMON-LABEL: @rsh_inbounds 111 int rsh_inbounds(int a, int b) { 112 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 113 // CHECK-COMMON: br i1 %[[INBOUNDS]] 114 115 // CHECK-UBSAN: %[[ARG1:.*]] = zext 116 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 117 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_400]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 118 119 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 120 // CHECK-TRAP-NEXT: unreachable 121 122 // CHECK-COMMON: %[[RET:.*]] = ashr i32 {{.*}}, %[[RHS]] 123 // CHECK-COMMON-NEXT: ret i32 %[[RET]] 124 #line 400 125 return a >> b; 126 } 127 128 // CHECK-COMMON-LABEL: @load 129 int load(int *p) { 130 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({{.*}} @[[LINE_500]] to i8*), i64 %{{.*}}) 131 132 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 133 // CHECK-TRAP-NEXT: unreachable 134 #line 500 135 return *p; 136 } 137 138 // CHECK-COMMON-LABEL: @store 139 void store(int *p, int q) { 140 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({{.*}} @[[LINE_600]] to i8*), i64 %{{.*}}) 141 142 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 143 // CHECK-TRAP-NEXT: unreachable 144 #line 600 145 *p = q; 146 } 147 148 struct S { int k; }; 149 150 // CHECK-COMMON-LABEL: @member_access 151 int *member_access(struct S *p) { 152 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({{.*}} @[[LINE_700]] to i8*), i64 %{{.*}}) 153 154 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 155 // CHECK-TRAP-NEXT: unreachable 156 #line 700 157 return &p->k; 158 } 159 160 // CHECK-COMMON-LABEL: @signed_overflow 161 int signed_overflow(int a, int b) { 162 // CHECK-UBSAN: %[[ARG1:.*]] = zext 163 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 164 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_add_overflow(i8* bitcast ({{.*}} @[[LINE_800]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 165 166 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 167 // CHECK-TRAP-NEXT: unreachable 168 #line 800 169 return a + b; 170 } 171 172 // CHECK-COMMON-LABEL: @no_return 173 int no_return() { 174 // Reaching the end of a noreturn function is fine in C. 175 // FIXME: If the user explicitly requests -fsanitize=return, we should catch 176 // that here even though it's not undefined behavior. 177 // CHECK-COMMON-NOT: call 178 // CHECK-COMMON-NOT: unreachable 179 // CHECK-COMMON: ret i32 180 } 181 182 // CHECK-UBSAN-LABEL: @vla_bound 183 void vla_bound(int n) { 184 // CHECK-UBSAN: icmp sgt i32 %[[PARAM:.*]], 0 185 // 186 // CHECK-UBSAN: %[[ARG:.*]] = zext i32 %[[PARAM]] to i64 187 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_vla_bound_not_positive(i8* bitcast ({{.*}} @[[LINE_900]] to i8*), i64 %[[ARG]]) 188 #line 900 189 int arr[n * 3]; 190 } 191 192 // CHECK-UBSAN-LABEL: @int_float_no_overflow 193 float int_float_no_overflow(__int128 n) { 194 // CHECK-UBSAN-NOT: call void @__ubsan_handle 195 return n; 196 } 197 198 // CHECK-COMMON-LABEL: @int_float_overflow 199 float int_float_overflow(unsigned __int128 n) { 200 // This is 2**104. FLT_MAX is 2**128 - 2**104. 201 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i128 %{{.*}}, -20282409603651670423947251286016 202 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 203 204 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1000]] to i8*), 205 206 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 207 // CHECK-TRAP-NEXT: unreachable 208 #line 1000 209 return n; 210 } 211 212 // CHECK-COMMON-LABEL: @int_fp16_overflow 213 void int_fp16_overflow(int n, __fp16 *p) { 214 // CHECK-COMMON: %[[GE:.*]] = icmp sge i32 %{{.*}}, -65504 215 // CHECK-COMMON: %[[LE:.*]] = icmp sle i32 %{{.*}}, 65504 216 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 217 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 218 219 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1100]] to i8*), 220 221 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 222 // CHECK-TRAP-NEXT: unreachable 223 #line 1100 224 *p = n; 225 } 226 227 // CHECK-COMMON-LABEL: @float_int_overflow 228 int float_int_overflow(float f) { 229 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], 0xC1E0000020000000 230 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 0x41E0000000000000 231 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 232 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 233 234 // CHECK-UBSAN: %[[CAST:.*]] = bitcast float %[[F]] to i32 235 // CHECK-UBSAN: %[[ARG:.*]] = zext i32 %[[CAST]] to i64 236 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1200]] to i8*), i64 %[[ARG]] 237 238 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 239 // CHECK-TRAP-NEXT: unreachable 240 #line 1200 241 return f; 242 } 243 244 // CHECK-COMMON-LABEL: @long_double_int_overflow 245 int long_double_int_overflow(long double ld) { 246 // CHECK-UBSAN: alloca x86_fp80 247 248 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt x86_fp80 %[[F:.*]], 0xKC01E800000010000000 249 // CHECK-COMMON: %[[LE:.*]] = fcmp olt x86_fp80 %[[F]], 0xK401E800000000000000 250 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 251 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 252 253 // CHECK-UBSAN: store x86_fp80 %[[F]], x86_fp80* %[[ALLOCA:.*]], align 16, !nosanitize 254 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint x86_fp80* %[[ALLOCA]] to i64 255 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1300]] to i8*), i64 %[[ARG]] 256 257 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 258 // CHECK-TRAP-NEXT: unreachable 259 #line 1300 260 return ld; 261 } 262 263 // CHECK-COMMON-LABEL: @float_uint_overflow 264 unsigned float_uint_overflow(float f) { 265 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.{{0*}}e+00 266 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 0x41F0000000000000 267 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 268 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 269 270 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1400]] to i8*), 271 272 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 273 // CHECK-TRAP-NEXT: unreachable 274 #line 1400 275 return f; 276 } 277 278 // CHECK-COMMON-LABEL: @fp16_char_overflow 279 signed char fp16_char_overflow(__fp16 *p) { 280 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.29{{0*}}e+02 281 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 1.28{{0*}}e+02 282 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 283 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 284 285 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1500]] to i8*), 286 287 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 288 // CHECK-TRAP-NEXT: unreachable 289 #line 1500 290 return *p; 291 } 292 293 // CHECK-COMMON-LABEL: @float_float_overflow 294 float float_float_overflow(double f) { 295 // CHECK-COMMON: %[[F:.*]] = call double @llvm.fabs.f64( 296 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt double %[[F]], 0x47EFFFFFE0000000 297 // CHECK-COMMON: %[[LE:.*]] = fcmp olt double %[[F]], 0x7FF0000000000000 298 // CHECK-COMMON: %[[OUTOFBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 299 // CHECK-COMMON: %[[INBOUNDS:.*]] = xor i1 %[[OUTOFBOUNDS]], true 300 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 301 302 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1600]] to i8*), 303 304 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 305 // CHECK-TRAP-NEXT: unreachable 306 #line 1600 307 return f; 308 } 309 310 // CHECK-COMMON-LABEL: @int_divide_overflow 311 // CHECK-OVERFLOW-LABEL: @int_divide_overflow 312 int int_divide_overflow(int a, int b) { 313 // CHECK-COMMON: %[[ZERO:.*]] = icmp ne i32 %[[B:.*]], 0 314 // CHECK-OVERFLOW-NOT: icmp ne i32 %{{.*}}, 0 315 316 // CHECK-COMMON: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648 317 // CHECK-COMMON-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B]], -1 318 // CHECK-COMMON-NEXT: %[[OVER:.*]] = or i1 %[[AOK]], %[[BOK]] 319 // CHECK-COMMON: %[[OK:.*]] = and i1 %[[ZERO]], %[[OVER]] 320 // CHECK-COMMON: br i1 %[[OK]] 321 322 // CHECK-OVERFLOW: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648 323 // CHECK-OVERFLOW-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B:.*]], -1 324 // CHECK-OVERFLOW-NEXT: %[[OK:.*]] = or i1 %[[AOK]], %[[BOK]] 325 // CHECK-OVERFLOW: br i1 %[[OK]] 326 327 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 328 // CHECK-TRAP: unreachable 329 return a / b; 330 331 // CHECK-COMMON: } 332 // CHECK-OVERFLOW: } 333 } 334 335 // CHECK-COMMON-LABEL: @sour_bool 336 _Bool sour_bool(_Bool *p) { 337 // CHECK-COMMON: %[[OK:.*]] = icmp ule i8 {{.*}}, 1 338 // CHECK-COMMON: br i1 %[[OK]] 339 340 // CHECK-UBSAN: call void @__ubsan_handle_load_invalid_value(i8* bitcast ({{.*}}), i64 {{.*}}) 341 342 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 343 // CHECK-TRAP: unreachable 344 return *p; 345 } 346 347 // CHECK-COMMON-LABEL: @ret_nonnull 348 __attribute__((returns_nonnull)) 349 int *ret_nonnull(int *a) { 350 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 351 // CHECK-COMMON: br i1 [[OK]] 352 353 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_return 354 355 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 356 // CHECK-TRAP: unreachable 357 return a; 358 } 359 360 // CHECK-COMMON-LABEL: @call_decl_nonnull 361 __attribute__((nonnull)) void decl_nonnull(int *a); 362 void call_decl_nonnull(int *a) { 363 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 364 // CHECK-COMMON: br i1 [[OK]] 365 366 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 367 368 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 369 // CHECK-TRAP: unreachable 370 decl_nonnull(a); 371 } 372 373 extern void *memcpy (void *, const void *, unsigned) __attribute__((nonnull(1, 2))); 374 375 // CHECK-COMMON-LABEL: @call_memcpy_nonnull 376 void call_memcpy_nonnull(void *p, void *q, int sz) { 377 // CHECK-COMMON: icmp ne i8* {{.*}}, null 378 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 379 // CHECK-TRAP: call void @llvm.trap() 380 381 // CHECK-COMMON: icmp ne i8* {{.*}}, null 382 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 383 // CHECK-TRAP: call void @llvm.trap() 384 memcpy(p, q, sz); 385 } 386 387 extern void *memmove (void *, const void *, unsigned) __attribute__((nonnull(1, 2))); 388 389 // CHECK-COMMON-LABEL: @call_memmove_nonnull 390 void call_memmove_nonnull(void *p, void *q, int sz) { 391 // CHECK-COMMON: icmp ne i8* {{.*}}, null 392 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 393 // CHECK-TRAP: call void @llvm.trap() 394 395 // CHECK-COMMON: icmp ne i8* {{.*}}, null 396 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 397 // CHECK-TRAP: call void @llvm.trap() 398 memmove(p, q, sz); 399 } 400 401 // CHECK-COMMON-LABEL: @call_nonnull_variadic 402 __attribute__((nonnull)) void nonnull_variadic(int a, ...); 403 void call_nonnull_variadic(int a, int *b) { 404 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 405 // CHECK-COMMON: br i1 [[OK]] 406 407 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 408 // CHECK-UBSAN-NOT: __ubsan_handle_nonnull_arg 409 410 // CHECK-COMMON: call void (i32, ...) @nonnull_variadic 411 nonnull_variadic(a, b); 412 } 413 414 // CHECK-UBSAN: ![[WEIGHT_MD]] = !{!"branch_weights", i32 1048575, i32 1} 415 416 // CHECK-TRAP: attributes [[NR_NUW]] = { noreturn nounwind } 417