1 // RUN: %clang_cc1 -fsanitize=alignment,null,object-size,shift,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,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 | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-UBSAN 2 // RUN: %clang_cc1 -fsanitize-undefined-trap-on-error -fsanitize=alignment,null,object-size,shift,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,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 | FileCheck %s --check-prefix=CHECK-COMMON --check-prefix=CHECK-TRAP 3 // RUN: %clang_cc1 -fsanitize=null -fsanitize-recover=null -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-NULL 4 // RUN: %clang_cc1 -fsanitize=signed-integer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK-OVERFLOW 5 6 // CHECK-UBSAN: @[[INT:.*]] = private unnamed_addr constant { i16, i16, [6 x i8] } { i16 0, i16 11, [6 x i8] c"'int'\00" } 7 8 // FIXME: When we only emit each type once, use [[INT]] more below. 9 // CHECK-UBSAN: @[[LINE_100:.*]] = private unnamed_addr global {{.*}}, i32 100, i32 5 {{.*}} @[[INT]], i64 4, i8 1 10 // CHECK-UBSAN: @[[LINE_200:.*]] = {{.*}}, i32 200, i32 10 {{.*}}, i64 4, i8 0 11 // CHECK-UBSAN: @[[LINE_300:.*]] = {{.*}}, i32 300, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} 12 // CHECK-UBSAN: @[[LINE_400:.*]] = {{.*}}, i32 400, i32 12 {{.*}} @{{.*}}, {{.*}} @{{.*}} 13 // CHECK-UBSAN: @[[LINE_500:.*]] = {{.*}}, i32 500, i32 10 {{.*}} @{{.*}}, i64 4, i8 0 } 14 // CHECK-UBSAN: @[[LINE_600:.*]] = {{.*}}, i32 600, i32 3 {{.*}} @{{.*}}, i64 4, i8 1 } 15 16 // CHECK-UBSAN: @[[STRUCT_S:.*]] = private unnamed_addr constant { i16, i16, [11 x i8] } { i16 -1, i16 0, [11 x i8] c"'struct S'\00" } 17 18 // CHECK-UBSAN: @[[LINE_700:.*]] = {{.*}}, i32 700, i32 14 {{.*}} @[[STRUCT_S]], i64 4, i8 3 } 19 // CHECK-UBSAN: @[[LINE_800:.*]] = {{.*}}, i32 800, i32 12 {{.*}} @{{.*}} } 20 // CHECK-UBSAN: @[[LINE_900:.*]] = {{.*}}, i32 900, i32 11 {{.*}} @{{.*}} } 21 22 // CHECK-NULL: @[[LINE_100:.*]] = private unnamed_addr global {{.*}}, i32 100, i32 5 {{.*}} 23 24 // PR6805 25 // CHECK-COMMON-LABEL: @foo 26 // CHECK-NULL-LABEL: @foo 27 void foo() { 28 union { int i; } u; 29 // CHECK-COMMON: %[[CHECK0:.*]] = icmp ne {{.*}}* %[[PTR:.*]], null 30 31 // CHECK-COMMON: %[[I8PTR:.*]] = bitcast i32* %[[PTR]] to i8* 32 // CHECK-COMMON-NEXT: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8(i8* %[[I8PTR]], i1 false) 33 // CHECK-COMMON-NEXT: %[[CHECK1:.*]] = icmp uge i64 %[[SIZE]], 4 34 35 // CHECK-COMMON: %[[PTRTOINT:.*]] = ptrtoint {{.*}}* %[[PTR]] to i64 36 // CHECK-COMMON-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRTOINT]], 3 37 // CHECK-COMMON-NEXT: %[[CHECK2:.*]] = icmp eq i64 %[[MISALIGN]], 0 38 39 // CHECK-COMMON: %[[CHECK01:.*]] = and i1 %[[CHECK0]], %[[CHECK1]] 40 // CHECK-COMMON-NEXT: %[[OK:.*]] = and i1 %[[CHECK01]], %[[CHECK2]] 41 42 // CHECK-UBSAN: br i1 %[[OK]], {{.*}} !prof ![[WEIGHT_MD:.*]], !nosanitize 43 // CHECK-TRAP: br i1 %[[OK]], {{.*}} 44 45 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint {{.*}} %[[PTR]] to i64 46 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), i64 %[[ARG]]) 47 48 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW:#[0-9]+]] 49 // CHECK-TRAP-NEXT: unreachable 50 51 // With -fsanitize=null, only perform the null check. 52 // CHECK-NULL: %[[NULL:.*]] = icmp ne {{.*}}, null 53 // CHECK-NULL: br i1 %[[NULL]] 54 // CHECK-NULL: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), i64 %{{.*}}) 55 #line 100 56 u.i=1; 57 } 58 59 // CHECK-COMMON-LABEL: @bar 60 int bar(int *a) { 61 // CHECK-COMMON: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 62 // CHECK-COMMON-NEXT: icmp uge i64 %[[SIZE]], 4 63 64 // CHECK-COMMON: %[[PTRINT:.*]] = ptrtoint 65 // CHECK-COMMON-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3 66 // CHECK-COMMON-NEXT: icmp eq i64 %[[MISALIGN]], 0 67 68 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint 69 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_200]] to i8*), i64 %[[ARG]]) 70 71 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 72 // CHECK-TRAP-NEXT: unreachable 73 74 #line 200 75 return *a; 76 } 77 78 // CHECK-UBSAN-LABEL: @addr_space 79 int addr_space(int __attribute__((address_space(256))) *a) { 80 // CHECK-UBSAN-NOT: __ubsan 81 return *a; 82 } 83 84 // CHECK-COMMON-LABEL: @lsh_overflow 85 int lsh_overflow(int a, int b) { 86 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 87 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]], label %[[CHECKBB:.*]], label %[[CONTBB:.*]] 88 89 // CHECK-COMMON: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]] 90 // CHECK-COMMON-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]] 91 // CHECK-COMMON-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT]], 0 92 // CHECK-COMMON-NEXT: br label %[[CONTBB]] 93 94 // CHECK-COMMON: %[[VALID:.*]] = phi i1 [ %[[INBOUNDS]], {{.*}} ], [ %[[NO_OVERFLOW]], %[[CHECKBB]] ] 95 // CHECK-UBSAN: br i1 %[[VALID]], {{.*}} !prof ![[WEIGHT_MD]] 96 // CHECK-TRAP: br i1 %[[VALID]] 97 98 // CHECK-UBSAN: %[[ARG1:.*]] = zext 99 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 100 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_300]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 101 // CHECK-UBSAN-NOT: call void @__ubsan_handle_shift_out_of_bounds 102 103 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 104 // CHECK-TRAP: unreachable 105 // CHECK-TRAP-NOT: call void @llvm.trap() 106 107 // CHECK-COMMON: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]] 108 // CHECK-COMMON-NEXT: ret i32 %[[RET]] 109 #line 300 110 return a << b; 111 } 112 113 // CHECK-COMMON-LABEL: @rsh_inbounds 114 int rsh_inbounds(int a, int b) { 115 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 116 // CHECK-COMMON: br i1 %[[INBOUNDS]] 117 118 // CHECK-UBSAN: %[[ARG1:.*]] = zext 119 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 120 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_400]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 121 122 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 123 // CHECK-TRAP-NEXT: unreachable 124 125 // CHECK-COMMON: %[[RET:.*]] = ashr i32 %[[LHS]], %[[RHS]] 126 // CHECK-COMMON-NEXT: ret i32 %[[RET]] 127 #line 400 128 return a >> b; 129 } 130 131 // CHECK-COMMON-LABEL: @load 132 int load(int *p) { 133 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_500]] to i8*), i64 %{{.*}}) 134 135 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 136 // CHECK-TRAP-NEXT: unreachable 137 #line 500 138 return *p; 139 } 140 141 // CHECK-COMMON-LABEL: @store 142 void store(int *p, int q) { 143 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_600]] to i8*), i64 %{{.*}}) 144 145 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 146 // CHECK-TRAP-NEXT: unreachable 147 #line 600 148 *p = q; 149 } 150 151 struct S { int k; }; 152 153 // CHECK-COMMON-LABEL: @member_access 154 int *member_access(struct S *p) { 155 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_700]] to i8*), i64 %{{.*}}) 156 157 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 158 // CHECK-TRAP-NEXT: unreachable 159 #line 700 160 return &p->k; 161 } 162 163 // CHECK-COMMON-LABEL: @signed_overflow 164 int signed_overflow(int a, int b) { 165 // CHECK-UBSAN: %[[ARG1:.*]] = zext 166 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 167 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_add_overflow(i8* bitcast ({{.*}} @[[LINE_800]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 168 169 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 170 // CHECK-TRAP-NEXT: unreachable 171 #line 800 172 return a + b; 173 } 174 175 // CHECK-COMMON-LABEL: @no_return 176 int no_return() { 177 // Reaching the end of a noreturn function is fine in C. 178 // FIXME: If the user explicitly requests -fsanitize=return, we should catch 179 // that here even though it's not undefined behavior. 180 // CHECK-COMMON-NOT: call 181 // CHECK-COMMON-NOT: unreachable 182 // CHECK-COMMON: ret i32 183 } 184 185 // CHECK-UBSAN-LABEL: @vla_bound 186 void vla_bound(int n) { 187 // CHECK-UBSAN: icmp sgt i32 %[[PARAM:.*]], 0 188 // 189 // CHECK-UBSAN: %[[ARG:.*]] = zext i32 %[[PARAM]] to i64 190 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_vla_bound_not_positive(i8* bitcast ({{.*}} @[[LINE_900]] to i8*), i64 %[[ARG]]) 191 #line 900 192 int arr[n * 3]; 193 } 194 195 // CHECK-UBSAN-LABEL: @int_float_no_overflow 196 float int_float_no_overflow(__int128 n) { 197 // CHECK-UBSAN-NOT: call void @__ubsan_handle 198 return n; 199 } 200 201 // CHECK-COMMON-LABEL: @int_float_overflow 202 float int_float_overflow(unsigned __int128 n) { 203 // This is 2**104. FLT_MAX is 2**128 - 2**104. 204 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i128 %{{.*}}, -20282409603651670423947251286016 205 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 206 207 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow( 208 209 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 210 // CHECK-TRAP-NEXT: unreachable 211 return n; 212 } 213 214 // CHECK-COMMON-LABEL: @int_fp16_overflow 215 void int_fp16_overflow(int n, __fp16 *p) { 216 // CHECK-COMMON: %[[GE:.*]] = icmp sge i32 %{{.*}}, -65504 217 // CHECK-COMMON: %[[LE:.*]] = icmp sle i32 %{{.*}}, 65504 218 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 219 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 220 221 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow( 222 223 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 224 // CHECK-TRAP-NEXT: unreachable 225 *p = n; 226 } 227 228 // CHECK-COMMON-LABEL: @float_int_overflow 229 int float_int_overflow(float f) { 230 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], 0xC1E0000020000000 231 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 0x41E0000000000000 232 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 233 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 234 235 // CHECK-UBSAN: %[[CAST:.*]] = bitcast float %[[F]] to i32 236 // CHECK-UBSAN: %[[ARG:.*]] = zext i32 %[[CAST]] to i64 237 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow({{.*}}, i64 %[[ARG]] 238 239 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 240 // CHECK-TRAP-NEXT: unreachable 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:.*]], !nosanitize 254 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint x86_fp80* %[[ALLOCA]] to i64 255 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow({{.*}}, i64 %[[ARG]] 256 257 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 258 // CHECK-TRAP-NEXT: unreachable 259 return ld; 260 } 261 262 // CHECK-COMMON-LABEL: @float_uint_overflow 263 unsigned float_uint_overflow(float f) { 264 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.{{0*}}e+00 265 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 0x41F0000000000000 266 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 267 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 268 269 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow( 270 271 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 272 // CHECK-TRAP-NEXT: unreachable 273 return f; 274 } 275 276 // CHECK-COMMON-LABEL: @fp16_char_overflow 277 signed char fp16_char_overflow(__fp16 *p) { 278 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.29{{0*}}e+02 279 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 1.28{{0*}}e+02 280 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 281 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 282 283 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow( 284 285 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 286 // CHECK-TRAP-NEXT: unreachable 287 return *p; 288 } 289 290 // CHECK-COMMON-LABEL: @float_float_overflow 291 float float_float_overflow(double f) { 292 // CHECK-COMMON: %[[F:.*]] = call double @llvm.fabs.f64( 293 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt double %[[F]], 0x47EFFFFFE0000000 294 // CHECK-COMMON: %[[LE:.*]] = fcmp olt double %[[F]], 0x7FF0000000000000 295 // CHECK-COMMON: %[[OUTOFBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 296 // CHECK-COMMON: %[[INBOUNDS:.*]] = xor i1 %[[OUTOFBOUNDS]], true 297 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 298 299 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow( 300 301 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 302 // CHECK-TRAP-NEXT: unreachable 303 return f; 304 } 305 306 // CHECK-COMMON-LABEL: @int_divide_overflow 307 // CHECK-OVERFLOW-LABEL: @int_divide_overflow 308 int int_divide_overflow(int a, int b) { 309 // CHECK-COMMON: %[[ZERO:.*]] = icmp ne i32 %[[B:.*]], 0 310 // CHECK-OVERFLOW-NOT: icmp ne i32 %{{.*}}, 0 311 312 // CHECK-COMMON: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648 313 // CHECK-COMMON-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B]], -1 314 // CHECK-COMMON-NEXT: %[[OVER:.*]] = or i1 %[[AOK]], %[[BOK]] 315 // CHECK-COMMON: %[[OK:.*]] = and i1 %[[ZERO]], %[[OVER]] 316 // CHECK-COMMON: br i1 %[[OK]] 317 318 // CHECK-OVERFLOW: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648 319 // CHECK-OVERFLOW-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B:.*]], -1 320 // CHECK-OVERFLOW-NEXT: %[[OK:.*]] = or i1 %[[AOK]], %[[BOK]] 321 // CHECK-OVERFLOW: br i1 %[[OK]] 322 323 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 324 // CHECK-TRAP: unreachable 325 return a / b; 326 327 // CHECK-COMMON: } 328 // CHECK-OVERFLOW: } 329 } 330 331 // CHECK-COMMON-LABEL: @sour_bool 332 _Bool sour_bool(_Bool *p) { 333 // CHECK-COMMON: %[[OK:.*]] = icmp ule i8 {{.*}}, 1 334 // CHECK-COMMON: br i1 %[[OK]] 335 336 // CHECK-UBSAN: call void @__ubsan_handle_load_invalid_value(i8* bitcast ({{.*}}), i64 {{.*}}) 337 338 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 339 // CHECK-TRAP: unreachable 340 return *p; 341 } 342 343 // CHECK-COMMON-LABEL: @ret_nonnull 344 __attribute__((returns_nonnull)) 345 int *ret_nonnull(int *a) { 346 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 347 // CHECK-COMMON: br i1 [[OK]] 348 349 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_return 350 351 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 352 // CHECK-TRAP: unreachable 353 return a; 354 } 355 356 // CHECK-COMMON-LABEL: @call_decl_nonnull 357 __attribute__((nonnull)) void decl_nonnull(int *a); 358 void call_decl_nonnull(int *a) { 359 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 360 // CHECK-COMMON: br i1 [[OK]] 361 362 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 363 364 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 365 // CHECK-TRAP: unreachable 366 decl_nonnull(a); 367 } 368 369 // CHECK-COMMON-LABEL: @call_nonnull_variadic 370 __attribute__((nonnull)) void nonnull_variadic(int a, ...); 371 void call_nonnull_variadic(int a, int *b) { 372 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 373 // CHECK-COMMON: br i1 [[OK]] 374 375 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 376 // CHECK-UBSAN-NOT: __ubsan_handle_nonnull_arg 377 378 // CHECK-COMMON: call void (i32, ...)* @nonnull_variadic 379 nonnull_variadic(a, b); 380 } 381 382 // CHECK-UBSAN: ![[WEIGHT_MD]] = !{!"branch_weights", i32 1048575, i32 1} 383 384 // CHECK-TRAP: attributes [[NR_NUW]] = { noreturn nounwind } 385