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=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 // CHECK-UBSAN: @[[LINE_1000:.*]] = {{.*}}, i32 1000, i32 10 {{.*}} @{{.*}} } 22 // CHECK-UBSAN: @[[FP16:.*]] = private unnamed_addr constant { i16, i16, [9 x i8] } { i16 1, i16 16, [9 x i8] c"'__fp16'\00" } 23 // CHECK-UBSAN: @[[LINE_1100:.*]] = {{.*}}, i32 1100, i32 8 {{.*}} @{{.*}} } 24 // CHECK-UBSAN: @[[LINE_1200:.*]] = {{.*}}, i32 1200, i32 10 {{.*}} @{{.*}} } 25 // CHECK-UBSAN: @[[LINE_1300:.*]] = {{.*}}, i32 1300, i32 10 {{.*}} @{{.*}} } 26 // CHECK-UBSAN: @[[LINE_1400:.*]] = {{.*}}, i32 1400, i32 10 {{.*}} @{{.*}} } 27 // Make sure we check the fp16 type_mismatch data so we can easily match the signed char float_cast_overflow 28 // CHECK-UBSAN: @[[LINE_1500:.*]] = {{.*}}, i32 1500, i32 10 {{.*}} @[[FP16]], {{.*}} } 29 // CHECK-UBSAN: @[[SCHAR:.*]] = private unnamed_addr constant { i16, i16, [14 x i8] } { i16 0, i16 7, [14 x i8] c"'signed char'\00" } 30 // CHECK-UBSAN: @[[LINE_1500:.*]] = {{.*}}, i32 1500, i32 10 {{.*}} @[[FP16]], {{.*}} } 31 // CHECK-UBSAN: @[[LINE_1600:.*]] = {{.*}}, i32 1600, i32 10 {{.*}} @{{.*}} } 32 33 // CHECK-NULL: @[[LINE_100:.*]] = private unnamed_addr global {{.*}}, i32 100, i32 5 {{.*}} 34 35 // PR6805 36 // CHECK-COMMON-LABEL: @foo 37 // CHECK-NULL-LABEL: @foo 38 void foo() { 39 union { int i; } u; 40 // CHECK-COMMON: %[[CHECK0:.*]] = icmp ne {{.*}}* %[[PTR:.*]], null 41 42 // CHECK-COMMON: %[[I8PTR:.*]] = bitcast i32* %[[PTR]] to i8* 43 // CHECK-COMMON-NEXT: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64.p0i8(i8* %[[I8PTR]], i1 false) 44 // CHECK-COMMON-NEXT: %[[CHECK1:.*]] = icmp uge i64 %[[SIZE]], 4 45 46 // CHECK-COMMON: %[[PTRTOINT:.*]] = ptrtoint {{.*}}* %[[PTR]] to i64 47 // CHECK-COMMON-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRTOINT]], 3 48 // CHECK-COMMON-NEXT: %[[CHECK2:.*]] = icmp eq i64 %[[MISALIGN]], 0 49 50 // CHECK-COMMON: %[[CHECK01:.*]] = and i1 %[[CHECK0]], %[[CHECK1]] 51 // CHECK-COMMON-NEXT: %[[OK:.*]] = and i1 %[[CHECK01]], %[[CHECK2]] 52 53 // CHECK-UBSAN: br i1 %[[OK]], {{.*}} !prof ![[WEIGHT_MD:.*]], !nosanitize 54 // CHECK-TRAP: br i1 %[[OK]], {{.*}} 55 56 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint {{.*}} %[[PTR]] to i64 57 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), i64 %[[ARG]]) 58 59 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW:#[0-9]+]] 60 // CHECK-TRAP-NEXT: unreachable 61 62 // With -fsanitize=null, only perform the null check. 63 // CHECK-NULL: %[[NULL:.*]] = icmp ne {{.*}}, null 64 // CHECK-NULL: br i1 %[[NULL]] 65 // CHECK-NULL: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_100]] to i8*), i64 %{{.*}}) 66 #line 100 67 u.i=1; 68 } 69 70 // CHECK-COMMON-LABEL: @bar 71 int bar(int *a) { 72 // CHECK-COMMON: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64 73 // CHECK-COMMON-NEXT: icmp uge i64 %[[SIZE]], 4 74 75 // CHECK-COMMON: %[[PTRINT:.*]] = ptrtoint 76 // CHECK-COMMON-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRINT]], 3 77 // CHECK-COMMON-NEXT: icmp eq i64 %[[MISALIGN]], 0 78 79 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint 80 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_200]] to i8*), i64 %[[ARG]]) 81 82 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 83 // CHECK-TRAP-NEXT: unreachable 84 85 #line 200 86 return *a; 87 } 88 89 // CHECK-UBSAN-LABEL: @addr_space 90 int addr_space(int __attribute__((address_space(256))) *a) { 91 // CHECK-UBSAN-NOT: __ubsan 92 return *a; 93 } 94 95 // CHECK-COMMON-LABEL: @lsh_overflow 96 int lsh_overflow(int a, int b) { 97 // CHECK-COMMON: %[[RHS_INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 98 // CHECK-COMMON-NEXT: br i1 %[[RHS_INBOUNDS]], label %[[CHECK_BB:.*]], label %[[CONT_BB:.*]], 99 100 // CHECK-COMMON: [[CHECK_BB]]: 101 // CHECK-COMMON-NEXT: %[[SHIFTED_OUT_WIDTH:.*]] = sub nuw nsw i32 31, %[[RHS]] 102 // CHECK-COMMON-NEXT: %[[SHIFTED_OUT:.*]] = lshr i32 %[[LHS:.*]], %[[SHIFTED_OUT_WIDTH]] 103 // CHECK-COMMON-NEXT: %[[NO_OVERFLOW:.*]] = icmp eq i32 %[[SHIFTED_OUT]], 0 104 // CHECK-COMMON-NEXT: br label %[[CONT_BB]] 105 106 // CHECK-COMMON: [[CONT_BB]]: 107 // CHECK-COMMON-NEXT: %[[VALID_BASE:.*]] = phi i1 [ true, {{.*}} ], [ %[[NO_OVERFLOW]], %[[CHECK_BB]] ] 108 // CHECK-COMMON-NEXT: %[[VALID:.*]] = and i1 %[[RHS_INBOUNDS]], %[[VALID_BASE]] 109 110 // CHECK-UBSAN: br i1 %[[VALID]], {{.*}} !prof ![[WEIGHT_MD]] 111 // CHECK-TRAP: br i1 %[[VALID]] 112 113 // CHECK-UBSAN: %[[ARG1:.*]] = zext 114 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 115 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_300]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 116 // CHECK-UBSAN-NOT: call void @__ubsan_handle_shift_out_of_bounds 117 118 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 119 // CHECK-TRAP: unreachable 120 // CHECK-TRAP-NOT: call void @llvm.trap() 121 122 // CHECK-COMMON: %[[RET:.*]] = shl i32 %[[LHS]], %[[RHS]] 123 // CHECK-COMMON-NEXT: ret i32 %[[RET]] 124 #line 300 125 return a << b; 126 } 127 128 // CHECK-COMMON-LABEL: @rsh_inbounds 129 int rsh_inbounds(int a, int b) { 130 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31 131 // CHECK-COMMON: br i1 %[[INBOUNDS]] 132 133 // CHECK-UBSAN: %[[ARG1:.*]] = zext 134 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 135 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_shift_out_of_bounds(i8* bitcast ({{.*}} @[[LINE_400]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 136 137 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 138 // CHECK-TRAP-NEXT: unreachable 139 140 // CHECK-COMMON: %[[RET:.*]] = ashr i32 {{.*}}, %[[RHS]] 141 // CHECK-COMMON-NEXT: ret i32 %[[RET]] 142 #line 400 143 return a >> b; 144 } 145 146 // CHECK-COMMON-LABEL: @load 147 int load(int *p) { 148 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_500]] to i8*), i64 %{{.*}}) 149 150 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 151 // CHECK-TRAP-NEXT: unreachable 152 #line 500 153 return *p; 154 } 155 156 // CHECK-COMMON-LABEL: @store 157 void store(int *p, int q) { 158 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_600]] to i8*), i64 %{{.*}}) 159 160 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 161 // CHECK-TRAP-NEXT: unreachable 162 #line 600 163 *p = q; 164 } 165 166 struct S { int k; }; 167 168 // CHECK-COMMON-LABEL: @member_access 169 int *member_access(struct S *p) { 170 // CHECK-UBSAN: call void @__ubsan_handle_type_mismatch(i8* bitcast ({{.*}} @[[LINE_700]] to i8*), i64 %{{.*}}) 171 172 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 173 // CHECK-TRAP-NEXT: unreachable 174 #line 700 175 return &p->k; 176 } 177 178 // CHECK-COMMON-LABEL: @signed_overflow 179 int signed_overflow(int a, int b) { 180 // CHECK-UBSAN: %[[ARG1:.*]] = zext 181 // CHECK-UBSAN-NEXT: %[[ARG2:.*]] = zext 182 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_add_overflow(i8* bitcast ({{.*}} @[[LINE_800]] to i8*), i64 %[[ARG1]], i64 %[[ARG2]]) 183 184 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 185 // CHECK-TRAP-NEXT: unreachable 186 #line 800 187 return a + b; 188 } 189 190 // CHECK-COMMON-LABEL: @no_return 191 int no_return() { 192 // Reaching the end of a noreturn function is fine in C. 193 // FIXME: If the user explicitly requests -fsanitize=return, we should catch 194 // that here even though it's not undefined behavior. 195 // CHECK-COMMON-NOT: call 196 // CHECK-COMMON-NOT: unreachable 197 // CHECK-COMMON: ret i32 198 } 199 200 // CHECK-UBSAN-LABEL: @vla_bound 201 void vla_bound(int n) { 202 // CHECK-UBSAN: icmp sgt i32 %[[PARAM:.*]], 0 203 // 204 // CHECK-UBSAN: %[[ARG:.*]] = zext i32 %[[PARAM]] to i64 205 // CHECK-UBSAN-NEXT: call void @__ubsan_handle_vla_bound_not_positive(i8* bitcast ({{.*}} @[[LINE_900]] to i8*), i64 %[[ARG]]) 206 #line 900 207 int arr[n * 3]; 208 } 209 210 // CHECK-UBSAN-LABEL: @int_float_no_overflow 211 float int_float_no_overflow(__int128 n) { 212 // CHECK-UBSAN-NOT: call void @__ubsan_handle 213 return n; 214 } 215 216 // CHECK-COMMON-LABEL: @int_float_overflow 217 float int_float_overflow(unsigned __int128 n) { 218 // This is 2**104. FLT_MAX is 2**128 - 2**104. 219 // CHECK-COMMON: %[[INBOUNDS:.*]] = icmp ule i128 %{{.*}}, -20282409603651670423947251286016 220 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 221 222 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1000]] to i8*), 223 224 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 225 // CHECK-TRAP-NEXT: unreachable 226 #line 1000 227 return n; 228 } 229 230 // CHECK-COMMON-LABEL: @int_fp16_overflow 231 void int_fp16_overflow(int n, __fp16 *p) { 232 // CHECK-COMMON: %[[GE:.*]] = icmp sge i32 %{{.*}}, -65504 233 // CHECK-COMMON: %[[LE:.*]] = icmp sle i32 %{{.*}}, 65504 234 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 235 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 236 237 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1100]] to i8*), 238 239 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 240 // CHECK-TRAP-NEXT: unreachable 241 #line 1100 242 *p = n; 243 } 244 245 // CHECK-COMMON-LABEL: @float_int_overflow 246 int float_int_overflow(float f) { 247 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], 0xC1E0000020000000 248 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 0x41E0000000000000 249 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 250 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 251 252 // CHECK-UBSAN: %[[CAST:.*]] = bitcast float %[[F]] to i32 253 // CHECK-UBSAN: %[[ARG:.*]] = zext i32 %[[CAST]] to i64 254 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1200]] to i8*), i64 %[[ARG]] 255 256 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 257 // CHECK-TRAP-NEXT: unreachable 258 #line 1200 259 return f; 260 } 261 262 // CHECK-COMMON-LABEL: @long_double_int_overflow 263 int long_double_int_overflow(long double ld) { 264 // CHECK-UBSAN: alloca x86_fp80 265 266 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt x86_fp80 %[[F:.*]], 0xKC01E800000010000000 267 // CHECK-COMMON: %[[LE:.*]] = fcmp olt x86_fp80 %[[F]], 0xK401E800000000000000 268 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 269 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 270 271 // CHECK-UBSAN: store x86_fp80 %[[F]], x86_fp80* %[[ALLOCA:.*]], align 16, !nosanitize 272 // CHECK-UBSAN: %[[ARG:.*]] = ptrtoint x86_fp80* %[[ALLOCA]] to i64 273 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1300]] to i8*), i64 %[[ARG]] 274 275 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 276 // CHECK-TRAP-NEXT: unreachable 277 #line 1300 278 return ld; 279 } 280 281 // CHECK-COMMON-LABEL: @float_uint_overflow 282 unsigned float_uint_overflow(float f) { 283 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.{{0*}}e+00 284 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 0x41F0000000000000 285 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 286 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 287 288 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1400]] to i8*), 289 290 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 291 // CHECK-TRAP-NEXT: unreachable 292 #line 1400 293 return f; 294 } 295 296 // CHECK-COMMON-LABEL: @fp16_char_overflow 297 signed char fp16_char_overflow(__fp16 *p) { 298 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt float %[[F:.*]], -1.29{{0*}}e+02 299 // CHECK-COMMON: %[[LE:.*]] = fcmp olt float %[[F]], 1.28{{0*}}e+02 300 // CHECK-COMMON: %[[INBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 301 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 302 303 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1500]] to i8*), 304 305 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 306 // CHECK-TRAP-NEXT: unreachable 307 #line 1500 308 return *p; 309 } 310 311 // CHECK-COMMON-LABEL: @float_float_overflow 312 float float_float_overflow(double f) { 313 // CHECK-COMMON: %[[F:.*]] = call double @llvm.fabs.f64( 314 // CHECK-COMMON: %[[GE:.*]] = fcmp ogt double %[[F]], 0x47EFFFFFE0000000 315 // CHECK-COMMON: %[[LE:.*]] = fcmp olt double %[[F]], 0x7FF0000000000000 316 // CHECK-COMMON: %[[OUTOFBOUNDS:.*]] = and i1 %[[GE]], %[[LE]] 317 // CHECK-COMMON: %[[INBOUNDS:.*]] = xor i1 %[[OUTOFBOUNDS]], true 318 // CHECK-COMMON-NEXT: br i1 %[[INBOUNDS]] 319 320 // CHECK-UBSAN: call void @__ubsan_handle_float_cast_overflow(i8* bitcast ({{.*}} @[[LINE_1600]] to i8*), 321 322 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 323 // CHECK-TRAP-NEXT: unreachable 324 #line 1600 325 return f; 326 } 327 328 // CHECK-COMMON-LABEL: @int_divide_overflow 329 // CHECK-OVERFLOW-LABEL: @int_divide_overflow 330 int int_divide_overflow(int a, int b) { 331 // CHECK-COMMON: %[[ZERO:.*]] = icmp ne i32 %[[B:.*]], 0 332 // CHECK-OVERFLOW-NOT: icmp ne i32 %{{.*}}, 0 333 334 // CHECK-COMMON: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648 335 // CHECK-COMMON-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B]], -1 336 // CHECK-COMMON-NEXT: %[[OVER:.*]] = or i1 %[[AOK]], %[[BOK]] 337 // CHECK-COMMON: %[[OK:.*]] = and i1 %[[ZERO]], %[[OVER]] 338 // CHECK-COMMON: br i1 %[[OK]] 339 340 // CHECK-OVERFLOW: %[[AOK:.*]] = icmp ne i32 %[[A:.*]], -2147483648 341 // CHECK-OVERFLOW-NEXT: %[[BOK:.*]] = icmp ne i32 %[[B:.*]], -1 342 // CHECK-OVERFLOW-NEXT: %[[OK:.*]] = or i1 %[[AOK]], %[[BOK]] 343 // CHECK-OVERFLOW: br i1 %[[OK]] 344 345 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 346 // CHECK-TRAP: unreachable 347 return a / b; 348 349 // CHECK-COMMON: } 350 // CHECK-OVERFLOW: } 351 } 352 353 // CHECK-COMMON-LABEL: @sour_bool 354 _Bool sour_bool(_Bool *p) { 355 // CHECK-COMMON: %[[OK:.*]] = icmp ule i8 {{.*}}, 1 356 // CHECK-COMMON: br i1 %[[OK]] 357 358 // CHECK-UBSAN: call void @__ubsan_handle_load_invalid_value(i8* bitcast ({{.*}}), i64 {{.*}}) 359 360 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 361 // CHECK-TRAP: unreachable 362 return *p; 363 } 364 365 // CHECK-COMMON-LABEL: @ret_nonnull 366 __attribute__((returns_nonnull)) 367 int *ret_nonnull(int *a) { 368 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 369 // CHECK-COMMON: br i1 [[OK]] 370 371 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_return 372 373 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 374 // CHECK-TRAP: unreachable 375 return a; 376 } 377 378 // CHECK-COMMON-LABEL: @call_decl_nonnull 379 __attribute__((nonnull)) void decl_nonnull(int *a); 380 void call_decl_nonnull(int *a) { 381 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 382 // CHECK-COMMON: br i1 [[OK]] 383 384 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 385 386 // CHECK-TRAP: call void @llvm.trap() [[NR_NUW]] 387 // CHECK-TRAP: unreachable 388 decl_nonnull(a); 389 } 390 391 extern void *memcpy (void *, const void *, unsigned) __attribute__((nonnull(1, 2))); 392 393 // CHECK-COMMON-LABEL: @call_memcpy_nonnull 394 void call_memcpy_nonnull(void *p, void *q, int sz) { 395 // CHECK-COMMON: icmp ne i8* {{.*}}, null 396 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 397 // CHECK-TRAP: call void @llvm.trap() 398 399 // CHECK-COMMON: icmp ne i8* {{.*}}, null 400 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 401 // CHECK-TRAP: call void @llvm.trap() 402 memcpy(p, q, sz); 403 } 404 405 extern void *memmove (void *, const void *, unsigned) __attribute__((nonnull(1, 2))); 406 407 // CHECK-COMMON-LABEL: @call_memmove_nonnull 408 void call_memmove_nonnull(void *p, void *q, int sz) { 409 // CHECK-COMMON: icmp ne i8* {{.*}}, null 410 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 411 // CHECK-TRAP: call void @llvm.trap() 412 413 // CHECK-COMMON: icmp ne i8* {{.*}}, null 414 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 415 // CHECK-TRAP: call void @llvm.trap() 416 memmove(p, q, sz); 417 } 418 419 // CHECK-COMMON-LABEL: @call_nonnull_variadic 420 __attribute__((nonnull)) void nonnull_variadic(int a, ...); 421 void call_nonnull_variadic(int a, int *b) { 422 // CHECK-COMMON: [[OK:%.*]] = icmp ne i32* {{.*}}, null 423 // CHECK-COMMON: br i1 [[OK]] 424 425 // CHECK-UBSAN: call void @__ubsan_handle_nonnull_arg 426 // CHECK-UBSAN-NOT: __ubsan_handle_nonnull_arg 427 428 // CHECK-COMMON: call void (i32, ...) @nonnull_variadic 429 nonnull_variadic(a, b); 430 } 431 432 // CHECK-UBSAN: ![[WEIGHT_MD]] = !{!"branch_weights", i32 1048575, i32 1} 433 434 // CHECK-TRAP: attributes [[NR_NUW]] = { noreturn nounwind } 435
