1 // RUN: %clang_cc1 %s -emit-llvm -o - -ffreestanding -ffake-address-space-map -triple=i686-apple-darwin9 | FileCheck %s 2 // REQUIRES: x86-registered-target 3 4 // Also test serialization of atomic operations here, to avoid duplicating the 5 // test. 6 // RUN: %clang_cc1 %s -emit-pch -o %t -ffreestanding -ffake-address-space-map -triple=i686-apple-darwin9 7 // RUN: %clang_cc1 %s -include-pch %t -ffreestanding -ffake-address-space-map -triple=i686-apple-darwin9 -emit-llvm -o - | FileCheck %s 8 #ifndef ALREADY_INCLUDED 9 #define ALREADY_INCLUDED 10 11 #include <stdatomic.h> 12 13 // Basic IRGen tests for __c11_atomic_* and GNU __atomic_* 14 15 int fi1(_Atomic(int) *i) { 16 // CHECK-LABEL: @fi1 17 // CHECK: load atomic i32, i32* {{.*}} seq_cst 18 return __c11_atomic_load(i, memory_order_seq_cst); 19 } 20 21 int fi1a(int *i) { 22 // CHECK-LABEL: @fi1a 23 // CHECK: load atomic i32, i32* {{.*}} seq_cst 24 int v; 25 __atomic_load(i, &v, memory_order_seq_cst); 26 return v; 27 } 28 29 int fi1b(int *i) { 30 // CHECK-LABEL: @fi1b 31 // CHECK: load atomic i32, i32* {{.*}} seq_cst 32 return __atomic_load_n(i, memory_order_seq_cst); 33 } 34 35 int fi1c(atomic_int *i) { 36 // CHECK-LABEL: @fi1c 37 // CHECK: load atomic i32, i32* {{.*}} seq_cst 38 return atomic_load(i); 39 } 40 41 void fi2(_Atomic(int) *i) { 42 // CHECK-LABEL: @fi2 43 // CHECK: store atomic i32 {{.*}} seq_cst 44 __c11_atomic_store(i, 1, memory_order_seq_cst); 45 } 46 47 void fi2a(int *i) { 48 // CHECK-LABEL: @fi2a 49 // CHECK: store atomic i32 {{.*}} seq_cst 50 int v = 1; 51 __atomic_store(i, &v, memory_order_seq_cst); 52 } 53 54 void fi2b(int *i) { 55 // CHECK-LABEL: @fi2b 56 // CHECK: store atomic i32 {{.*}} seq_cst 57 __atomic_store_n(i, 1, memory_order_seq_cst); 58 } 59 60 void fi2c(atomic_int *i) { 61 // CHECK-LABEL: @fi2c 62 // CHECK: store atomic i32 {{.*}} seq_cst 63 atomic_store(i, 1); 64 } 65 66 int fi3(_Atomic(int) *i) { 67 // CHECK-LABEL: @fi3 68 // CHECK: atomicrmw and 69 // CHECK-NOT: and 70 return __c11_atomic_fetch_and(i, 1, memory_order_seq_cst); 71 } 72 73 int fi3a(int *i) { 74 // CHECK-LABEL: @fi3a 75 // CHECK: atomicrmw xor 76 // CHECK-NOT: xor 77 return __atomic_fetch_xor(i, 1, memory_order_seq_cst); 78 } 79 80 int fi3b(int *i) { 81 // CHECK-LABEL: @fi3b 82 // CHECK: atomicrmw add 83 // CHECK: add 84 return __atomic_add_fetch(i, 1, memory_order_seq_cst); 85 } 86 87 int fi3c(int *i) { 88 // CHECK-LABEL: @fi3c 89 // CHECK: atomicrmw nand 90 // CHECK-NOT: and 91 return __atomic_fetch_nand(i, 1, memory_order_seq_cst); 92 } 93 94 int fi3d(int *i) { 95 // CHECK-LABEL: @fi3d 96 // CHECK: atomicrmw nand 97 // CHECK: and 98 // CHECK: xor 99 return __atomic_nand_fetch(i, 1, memory_order_seq_cst); 100 } 101 102 int fi3e(atomic_int *i) { 103 // CHECK-LABEL: @fi3e 104 // CHECK: atomicrmw or 105 // CHECK-NOT: {{ or }} 106 return atomic_fetch_or(i, 1); 107 } 108 109 int fi3f(int *i) { 110 // CHECK-LABEL: @fi3f 111 // CHECK-NOT: store volatile 112 // CHECK: atomicrmw or 113 // CHECK-NOT: {{ or }} 114 return __atomic_fetch_or(i, (short)1, memory_order_seq_cst); 115 } 116 117 _Bool fi4(_Atomic(int) *i) { 118 // CHECK-LABEL: @fi4( 119 // CHECK: [[PAIR:%[.0-9A-Z_a-z]+]] = cmpxchg i32* [[PTR:%[.0-9A-Z_a-z]+]], i32 [[EXPECTED:%[.0-9A-Z_a-z]+]], i32 [[DESIRED:%[.0-9A-Z_a-z]+]] 120 // CHECK: [[OLD:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 0 121 // CHECK: [[CMP:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 1 122 // CHECK: br i1 [[CMP]], label %[[STORE_EXPECTED:[.0-9A-Z_a-z]+]], label %[[CONTINUE:[.0-9A-Z_a-z]+]] 123 // CHECK: store i32 [[OLD]] 124 int cmp = 0; 125 return __c11_atomic_compare_exchange_strong(i, &cmp, 1, memory_order_acquire, memory_order_acquire); 126 } 127 128 _Bool fi4a(int *i) { 129 // CHECK-LABEL: @fi4a 130 // CHECK: [[PAIR:%[.0-9A-Z_a-z]+]] = cmpxchg i32* [[PTR:%[.0-9A-Z_a-z]+]], i32 [[EXPECTED:%[.0-9A-Z_a-z]+]], i32 [[DESIRED:%[.0-9A-Z_a-z]+]] 131 // CHECK: [[OLD:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 0 132 // CHECK: [[CMP:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 1 133 // CHECK: br i1 [[CMP]], label %[[STORE_EXPECTED:[.0-9A-Z_a-z]+]], label %[[CONTINUE:[.0-9A-Z_a-z]+]] 134 // CHECK: store i32 [[OLD]] 135 int cmp = 0; 136 int desired = 1; 137 return __atomic_compare_exchange(i, &cmp, &desired, 0, memory_order_acquire, memory_order_acquire); 138 } 139 140 _Bool fi4b(int *i) { 141 // CHECK-LABEL: @fi4b( 142 // CHECK: [[PAIR:%[.0-9A-Z_a-z]+]] = cmpxchg weak i32* [[PTR:%[.0-9A-Z_a-z]+]], i32 [[EXPECTED:%[.0-9A-Z_a-z]+]], i32 [[DESIRED:%[.0-9A-Z_a-z]+]] 143 // CHECK: [[OLD:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 0 144 // CHECK: [[CMP:%[.0-9A-Z_a-z]+]] = extractvalue { i32, i1 } [[PAIR]], 1 145 // CHECK: br i1 [[CMP]], label %[[STORE_EXPECTED:[.0-9A-Z_a-z]+]], label %[[CONTINUE:[.0-9A-Z_a-z]+]] 146 // CHECK: store i32 [[OLD]] 147 int cmp = 0; 148 return __atomic_compare_exchange_n(i, &cmp, 1, 1, memory_order_acquire, memory_order_acquire); 149 } 150 151 _Bool fi4c(atomic_int *i) { 152 // CHECK-LABEL: @fi4c 153 // CHECK: cmpxchg i32* 154 int cmp = 0; 155 return atomic_compare_exchange_strong(i, &cmp, 1); 156 } 157 158 #define _AS1 __attribute__((address_space(1))) 159 _Bool fi4d(_Atomic(int) *i, int _AS1 *ptr2) { 160 // CHECK-LABEL: @fi4d( 161 // CHECK: [[EXPECTED:%[.0-9A-Z_a-z]+]] = load i32, i32 addrspace(1)* %{{[0-9]+}} 162 // CHECK: cmpxchg i32* %{{[0-9]+}}, i32 [[EXPECTED]], i32 %{{[0-9]+}} acquire acquire 163 return __c11_atomic_compare_exchange_strong(i, ptr2, 1, memory_order_acquire, memory_order_acquire); 164 } 165 166 float ff1(_Atomic(float) *d) { 167 // CHECK-LABEL: @ff1 168 // CHECK: load atomic i32, i32* {{.*}} monotonic 169 return __c11_atomic_load(d, memory_order_relaxed); 170 } 171 172 void ff2(_Atomic(float) *d) { 173 // CHECK-LABEL: @ff2 174 // CHECK: store atomic i32 {{.*}} release 175 __c11_atomic_store(d, 1, memory_order_release); 176 } 177 178 float ff3(_Atomic(float) *d) { 179 return __c11_atomic_exchange(d, 2, memory_order_seq_cst); 180 } 181 182 struct S { 183 double x; 184 }; 185 186 struct S fd1(struct S *a) { 187 // CHECK-LABEL: @fd1 188 // CHECK: [[RETVAL:%.*]] = alloca %struct.S, align 4 189 // CHECK: [[RET:%.*]] = alloca %struct.S, align 4 190 // CHECK: [[CAST:%.*]] = bitcast %struct.S* [[RET]] to i64* 191 // CHECK: [[CALL:%.*]] = call i64 @__atomic_load_8( 192 // CHECK: store i64 [[CALL]], i64* [[CAST]], align 4 193 struct S ret; 194 __atomic_load(a, &ret, memory_order_seq_cst); 195 return ret; 196 } 197 198 void fd2(struct S *a, struct S *b) { 199 // CHECK-LABEL: @fd2 200 // CHECK: [[A_ADDR:%.*]] = alloca %struct.S*, align 4 201 // CHECK-NEXT: [[B_ADDR:%.*]] = alloca %struct.S*, align 4 202 // CHECK-NEXT: store %struct.S* %a, %struct.S** [[A_ADDR]], align 4 203 // CHECK-NEXT: store %struct.S* %b, %struct.S** [[B_ADDR]], align 4 204 // CHECK-NEXT: [[LOAD_A_PTR:%.*]] = load %struct.S*, %struct.S** [[A_ADDR]], align 4 205 // CHECK-NEXT: [[LOAD_B_PTR:%.*]] = load %struct.S*, %struct.S** [[B_ADDR]], align 4 206 // CHECK-NEXT: [[COERCED_A_TMP:%.*]] = bitcast %struct.S* [[LOAD_A_PTR]] to i64* 207 // CHECK-NEXT: [[COERCED_B:%.*]] = bitcast %struct.S* [[LOAD_B_PTR]] to i64* 208 // CHECK-NEXT: [[COERCED_A:%.*]] = bitcast i64* [[COERCED_A_TMP]] to i8* 209 // CHECK-NEXT: [[LOAD_B:%.*]] = load i64, i64* [[COERCED_B]], align 4 210 // CHECK-NEXT: call void @__atomic_store_8(i8* [[COERCED_A]], i64 [[LOAD_B]], 211 // CHECK-NEXT: ret void 212 __atomic_store(a, b, memory_order_seq_cst); 213 } 214 215 void fd3(struct S *a, struct S *b, struct S *c) { 216 // CHECK-LABEL: @fd3 217 // CHECK: [[A_ADDR:%.*]] = alloca %struct.S*, align 4 218 // CHECK-NEXT: [[B_ADDR:%.*]] = alloca %struct.S*, align 4 219 // CHECK-NEXT: [[C_ADDR:%.*]] = alloca %struct.S*, align 4 220 // CHECK-NEXT: store %struct.S* %a, %struct.S** [[A_ADDR]], align 4 221 // CHECK-NEXT: store %struct.S* %b, %struct.S** [[B_ADDR]], align 4 222 // CHECK-NEXT: store %struct.S* %c, %struct.S** [[C_ADDR]], align 4 223 // CHECK-NEXT: [[LOAD_A_PTR:%.*]] = load %struct.S*, %struct.S** [[A_ADDR]], align 4 224 // CHECK-NEXT: [[LOAD_B_PTR:%.*]] = load %struct.S*, %struct.S** [[B_ADDR]], align 4 225 // CHECK-NEXT: [[LOAD_C_PTR:%.*]] = load %struct.S*, %struct.S** [[C_ADDR]], align 4 226 // CHECK-NEXT: [[COERCED_A_TMP:%.*]] = bitcast %struct.S* [[LOAD_A_PTR]] to i64* 227 // CHECK-NEXT: [[COERCED_B:%.*]] = bitcast %struct.S* [[LOAD_B_PTR]] to i64* 228 // CHECK-NEXT: [[COERCED_C:%.*]] = bitcast %struct.S* [[LOAD_C_PTR]] to i64* 229 // CHECK-NEXT: [[COERCED_A:%.*]] = bitcast i64* [[COERCED_A_TMP]] to i8* 230 // CHECK-NEXT: [[LOAD_B:%.*]] = load i64, i64* [[COERCED_B]], align 4 231 // CHECK-NEXT: [[CALL:%.*]] = call i64 @__atomic_exchange_8(i8* [[COERCED_A]], i64 [[LOAD_B]], 232 // CHECK-NEXT: store i64 [[CALL]], i64* [[COERCED_C]], align 4 233 234 __atomic_exchange(a, b, c, memory_order_seq_cst); 235 } 236 237 _Bool fd4(struct S *a, struct S *b, struct S *c) { 238 // CHECK-LABEL: @fd4 239 // CHECK: [[A_ADDR:%.*]] = alloca %struct.S*, align 4 240 // CHECK-NEXT: [[B_ADDR:%.*]] = alloca %struct.S*, align 4 241 // CHECK-NEXT: [[C_ADDR:%.*]] = alloca %struct.S*, align 4 242 // CHECK: store %struct.S* %a, %struct.S** [[A_ADDR]], align 4 243 // CHECK-NEXT: store %struct.S* %b, %struct.S** [[B_ADDR]], align 4 244 // CHECK-NEXT: store %struct.S* %c, %struct.S** [[C_ADDR]], align 4 245 // CHECK-NEXT: [[LOAD_A_PTR:%.*]] = load %struct.S*, %struct.S** [[A_ADDR]], align 4 246 // CHECK-NEXT: [[LOAD_B_PTR:%.*]] = load %struct.S*, %struct.S** [[B_ADDR]], align 4 247 // CHECK-NEXT: [[LOAD_C_PTR:%.*]] = load %struct.S*, %struct.S** [[C_ADDR]], align 4 248 // CHECK-NEXT: [[COERCED_A_TMP:%.*]] = bitcast %struct.S* [[LOAD_A_PTR]] to i64* 249 // CHECK-NEXT: [[COERCED_B_TMP:%.*]] = bitcast %struct.S* [[LOAD_B_PTR]] to i64* 250 // CHECK-NEXT: [[COERCED_C:%.*]] = bitcast %struct.S* [[LOAD_C_PTR]] to i64* 251 // CHECK-NEXT: [[COERCED_A:%.*]] = bitcast i64* [[COERCED_A_TMP]] to i8* 252 // CHECK-NEXT: [[COERCED_B:%.*]] = bitcast i64* [[COERCED_B_TMP]] to i8* 253 // CHECK-NEXT: [[LOAD_C:%.*]] = load i64, i64* [[COERCED_C]], align 4 254 // CHECK-NEXT: [[CALL:%.*]] = call zeroext i1 @__atomic_compare_exchange_8(i8* [[COERCED_A]], i8* [[COERCED_B]], i64 [[LOAD_C]] 255 // CHECK-NEXT: ret i1 [[CALL]] 256 return __atomic_compare_exchange(a, b, c, 1, 5, 5); 257 } 258 259 int* fp1(_Atomic(int*) *p) { 260 // CHECK-LABEL: @fp1 261 // CHECK: load atomic i32, i32* {{.*}} seq_cst 262 return __c11_atomic_load(p, memory_order_seq_cst); 263 } 264 265 int* fp2(_Atomic(int*) *p) { 266 // CHECK-LABEL: @fp2 267 // CHECK: store i32 4 268 // CHECK: atomicrmw add {{.*}} monotonic 269 return __c11_atomic_fetch_add(p, 1, memory_order_relaxed); 270 } 271 272 int *fp2a(int **p) { 273 // CHECK-LABEL: @fp2a 274 // CHECK: store i32 4 275 // CHECK: atomicrmw sub {{.*}} monotonic 276 // Note, the GNU builtins do not multiply by sizeof(T)! 277 return __atomic_fetch_sub(p, 4, memory_order_relaxed); 278 } 279 280 _Complex float fc(_Atomic(_Complex float) *c) { 281 // CHECK-LABEL: @fc 282 // CHECK: atomicrmw xchg i64* 283 return __c11_atomic_exchange(c, 2, memory_order_seq_cst); 284 } 285 286 typedef struct X { int x; } X; 287 X fs(_Atomic(X) *c) { 288 // CHECK-LABEL: @fs 289 // CHECK: atomicrmw xchg i32* 290 return __c11_atomic_exchange(c, (X){2}, memory_order_seq_cst); 291 } 292 293 X fsa(X *c, X *d) { 294 // CHECK-LABEL: @fsa 295 // CHECK: atomicrmw xchg i32* 296 X ret; 297 __atomic_exchange(c, d, &ret, memory_order_seq_cst); 298 return ret; 299 } 300 301 _Bool fsb(_Bool *c) { 302 // CHECK-LABEL: @fsb 303 // CHECK: atomicrmw xchg i8* 304 return __atomic_exchange_n(c, 1, memory_order_seq_cst); 305 } 306 307 char flag1; 308 volatile char flag2; 309 void test_and_set() { 310 // CHECK: atomicrmw xchg i8* @flag1, i8 1 seq_cst 311 __atomic_test_and_set(&flag1, memory_order_seq_cst); 312 // CHECK: atomicrmw volatile xchg i8* @flag2, i8 1 acquire 313 __atomic_test_and_set(&flag2, memory_order_acquire); 314 // CHECK: store atomic volatile i8 0, i8* @flag2 release 315 __atomic_clear(&flag2, memory_order_release); 316 // CHECK: store atomic i8 0, i8* @flag1 seq_cst 317 __atomic_clear(&flag1, memory_order_seq_cst); 318 } 319 320 struct Sixteen { 321 char c[16]; 322 } sixteen; 323 struct Seventeen { 324 char c[17]; 325 } seventeen; 326 327 struct Incomplete; 328 329 int lock_free(struct Incomplete *incomplete) { 330 // CHECK-LABEL: @lock_free 331 332 // CHECK: call i32 @__atomic_is_lock_free(i32 3, i8* null) 333 __c11_atomic_is_lock_free(3); 334 335 // CHECK: call i32 @__atomic_is_lock_free(i32 16, i8* {{.*}}@sixteen{{.*}}) 336 __atomic_is_lock_free(16, &sixteen); 337 338 // CHECK: call i32 @__atomic_is_lock_free(i32 17, i8* {{.*}}@seventeen{{.*}}) 339 __atomic_is_lock_free(17, &seventeen); 340 341 // CHECK: call i32 @__atomic_is_lock_free(i32 4, {{.*}}) 342 __atomic_is_lock_free(4, incomplete); 343 344 char cs[20]; 345 // CHECK: call i32 @__atomic_is_lock_free(i32 4, {{.*}}) 346 __atomic_is_lock_free(4, cs+1); 347 348 // CHECK-NOT: call 349 __atomic_always_lock_free(3, 0); 350 __atomic_always_lock_free(16, 0); 351 __atomic_always_lock_free(17, 0); 352 __atomic_always_lock_free(16, &sixteen); 353 __atomic_always_lock_free(17, &seventeen); 354 355 int n; 356 __atomic_is_lock_free(4, &n); 357 358 // CHECK: ret i32 1 359 return __c11_atomic_is_lock_free(sizeof(_Atomic(int))); 360 } 361 362 // Tests for atomic operations on big values. These should call the functions 363 // defined here: 364 // http://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary#The_Library_interface 365 366 struct foo { 367 int big[128]; 368 }; 369 struct bar { 370 char c[3]; 371 }; 372 373 struct bar smallThing, thing1, thing2; 374 struct foo bigThing; 375 _Atomic(struct foo) bigAtomic; 376 377 void structAtomicStore() { 378 // CHECK-LABEL: @structAtomicStore 379 struct foo f = {0}; 380 struct bar b = {0}; 381 __atomic_store(&smallThing, &b, 5); 382 // CHECK: call void @__atomic_store(i32 3, i8* {{.*}} @smallThing 383 384 __atomic_store(&bigThing, &f, 5); 385 // CHECK: call void @__atomic_store(i32 512, i8* {{.*}} @bigThing 386 } 387 void structAtomicLoad() { 388 // CHECK-LABEL: @structAtomicLoad 389 struct bar b; 390 __atomic_load(&smallThing, &b, 5); 391 // CHECK: call void @__atomic_load(i32 3, i8* {{.*}} @smallThing 392 393 struct foo f = {0}; 394 __atomic_load(&bigThing, &f, 5); 395 // CHECK: call void @__atomic_load(i32 512, i8* {{.*}} @bigThing 396 } 397 struct foo structAtomicExchange() { 398 // CHECK-LABEL: @structAtomicExchange 399 struct foo f = {0}; 400 struct foo old; 401 __atomic_exchange(&f, &bigThing, &old, 5); 402 // CHECK: call void @__atomic_exchange(i32 512, {{.*}}, i8* bitcast ({{.*}} @bigThing to i8*), 403 404 return __c11_atomic_exchange(&bigAtomic, f, 5); 405 // CHECK: call void @__atomic_exchange(i32 512, i8* bitcast ({{.*}} @bigAtomic to i8*), 406 } 407 int structAtomicCmpExchange() { 408 // CHECK-LABEL: @structAtomicCmpExchange 409 // CHECK: %[[x_mem:.*]] = alloca i8 410 _Bool x = __atomic_compare_exchange(&smallThing, &thing1, &thing2, 1, 5, 5); 411 // CHECK: %[[call1:.*]] = call zeroext i1 @__atomic_compare_exchange(i32 3, {{.*}} @smallThing{{.*}} @thing1{{.*}} @thing2 412 // CHECK: %[[zext1:.*]] = zext i1 %[[call1]] to i8 413 // CHECK: store i8 %[[zext1]], i8* %[[x_mem]], align 1 414 // CHECK: %[[x:.*]] = load i8, i8* %[[x_mem]] 415 // CHECK: %[[x_bool:.*]] = trunc i8 %[[x]] to i1 416 // CHECK: %[[conv1:.*]] = zext i1 %[[x_bool]] to i32 417 418 struct foo f = {0}; 419 struct foo g = {0}; 420 g.big[12] = 12; 421 return x & __c11_atomic_compare_exchange_strong(&bigAtomic, &f, g, 5, 5); 422 // CHECK: %[[call2:.*]] = call zeroext i1 @__atomic_compare_exchange(i32 512, i8* bitcast ({{.*}} @bigAtomic to i8*), 423 // CHECK: %[[conv2:.*]] = zext i1 %[[call2]] to i32 424 // CHECK: %[[and:.*]] = and i32 %[[conv1]], %[[conv2]] 425 // CHECK: ret i32 %[[and]] 426 } 427 428 // Check that no atomic operations are used in any initialisation of _Atomic 429 // types. 430 _Atomic(int) atomic_init_i = 42; 431 432 // CHECK-LABEL: @atomic_init_foo 433 void atomic_init_foo() 434 { 435 // CHECK-NOT: } 436 // CHECK-NOT: atomic 437 // CHECK: store 438 _Atomic(int) j = 12; 439 440 // CHECK-NOT: } 441 // CHECK-NOT: atomic 442 // CHECK: store 443 __c11_atomic_init(&j, 42); 444 445 // CHECK-NOT: atomic 446 // CHECK: } 447 } 448 449 // CHECK-LABEL: @failureOrder 450 void failureOrder(_Atomic(int) *ptr, int *ptr2) { 451 __c11_atomic_compare_exchange_strong(ptr, ptr2, 43, memory_order_acquire, memory_order_relaxed); 452 // CHECK: cmpxchg i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} acquire monotonic 453 454 __c11_atomic_compare_exchange_weak(ptr, ptr2, 43, memory_order_seq_cst, memory_order_acquire); 455 // CHECK: cmpxchg weak i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} seq_cst acquire 456 457 // Unknown ordering: conservatively pick strongest valid option (for now!). 458 __atomic_compare_exchange(ptr2, ptr2, ptr2, 0, memory_order_acq_rel, *ptr2); 459 // CHECK: cmpxchg i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} acq_rel acquire 460 461 // Undefined behaviour: don't really care what that last ordering is so leave 462 // it out: 463 __atomic_compare_exchange_n(ptr2, ptr2, 43, 1, memory_order_seq_cst, 42); 464 // CHECK: cmpxchg weak i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} seq_cst 465 } 466 467 // CHECK-LABEL: @generalFailureOrder 468 void generalFailureOrder(_Atomic(int) *ptr, int *ptr2, int success, int fail) { 469 __c11_atomic_compare_exchange_strong(ptr, ptr2, 42, success, fail); 470 // CHECK: switch i32 {{.*}}, label %[[MONOTONIC:[0-9a-zA-Z._]+]] [ 471 // CHECK-NEXT: i32 1, label %[[ACQUIRE:[0-9a-zA-Z._]+]] 472 // CHECK-NEXT: i32 2, label %[[ACQUIRE]] 473 // CHECK-NEXT: i32 3, label %[[RELEASE:[0-9a-zA-Z._]+]] 474 // CHECK-NEXT: i32 4, label %[[ACQREL:[0-9a-zA-Z._]+]] 475 // CHECK-NEXT: i32 5, label %[[SEQCST:[0-9a-zA-Z._]+]] 476 477 // CHECK: [[MONOTONIC]] 478 // CHECK: switch {{.*}}, label %[[MONOTONIC_MONOTONIC:[0-9a-zA-Z._]+]] [ 479 // CHECK-NEXT: ] 480 481 // CHECK: [[ACQUIRE]] 482 // CHECK: switch {{.*}}, label %[[ACQUIRE_MONOTONIC:[0-9a-zA-Z._]+]] [ 483 // CHECK-NEXT: i32 1, label %[[ACQUIRE_ACQUIRE:[0-9a-zA-Z._]+]] 484 // CHECK-NEXT: i32 2, label %[[ACQUIRE_ACQUIRE:[0-9a-zA-Z._]+]] 485 // CHECK-NEXT: ] 486 487 // CHECK: [[RELEASE]] 488 // CHECK: switch {{.*}}, label %[[RELEASE_MONOTONIC:[0-9a-zA-Z._]+]] [ 489 // CHECK-NEXT: ] 490 491 // CHECK: [[ACQREL]] 492 // CHECK: switch {{.*}}, label %[[ACQREL_MONOTONIC:[0-9a-zA-Z._]+]] [ 493 // CHECK-NEXT: i32 1, label %[[ACQREL_ACQUIRE:[0-9a-zA-Z._]+]] 494 // CHECK-NEXT: i32 2, label %[[ACQREL_ACQUIRE:[0-9a-zA-Z._]+]] 495 // CHECK-NEXT: ] 496 497 // CHECK: [[SEQCST]] 498 // CHECK: switch {{.*}}, label %[[SEQCST_MONOTONIC:[0-9a-zA-Z._]+]] [ 499 // CHECK-NEXT: i32 1, label %[[SEQCST_ACQUIRE:[0-9a-zA-Z._]+]] 500 // CHECK-NEXT: i32 2, label %[[SEQCST_ACQUIRE:[0-9a-zA-Z._]+]] 501 // CHECK-NEXT: i32 5, label %[[SEQCST_SEQCST:[0-9a-zA-Z._]+]] 502 // CHECK-NEXT: ] 503 504 // CHECK: [[MONOTONIC_MONOTONIC]] 505 // CHECK: cmpxchg {{.*}} monotonic monotonic 506 // CHECK: br 507 508 // CHECK: [[ACQUIRE_MONOTONIC]] 509 // CHECK: cmpxchg {{.*}} acquire monotonic 510 // CHECK: br 511 512 // CHECK: [[ACQUIRE_ACQUIRE]] 513 // CHECK: cmpxchg {{.*}} acquire acquire 514 // CHECK: br 515 516 // CHECK: [[ACQREL_MONOTONIC]] 517 // CHECK: cmpxchg {{.*}} acq_rel monotonic 518 // CHECK: br 519 520 // CHECK: [[ACQREL_ACQUIRE]] 521 // CHECK: cmpxchg {{.*}} acq_rel acquire 522 // CHECK: br 523 524 // CHECK: [[SEQCST_MONOTONIC]] 525 // CHECK: cmpxchg {{.*}} seq_cst monotonic 526 // CHECK: br 527 528 // CHECK: [[SEQCST_ACQUIRE]] 529 // CHECK: cmpxchg {{.*}} seq_cst acquire 530 // CHECK: br 531 532 // CHECK: [[SEQCST_SEQCST]] 533 // CHECK: cmpxchg {{.*}} seq_cst seq_cst 534 // CHECK: br 535 } 536 537 void generalWeakness(int *ptr, int *ptr2, _Bool weak) { 538 __atomic_compare_exchange_n(ptr, ptr2, 42, weak, memory_order_seq_cst, memory_order_seq_cst); 539 // CHECK: switch i1 {{.*}}, label %[[WEAK:[0-9a-zA-Z._]+]] [ 540 // CHECK-NEXT: i1 false, label %[[STRONG:[0-9a-zA-Z._]+]] 541 542 // CHECK: [[STRONG]] 543 // CHECK-NOT: br 544 // CHECK: cmpxchg {{.*}} seq_cst seq_cst 545 // CHECK: br 546 547 // CHECK: [[WEAK]] 548 // CHECK-NOT: br 549 // CHECK: cmpxchg weak {{.*}} seq_cst seq_cst 550 // CHECK: br 551 } 552 553 // Having checked the flow in the previous two cases, we'll trust clang to 554 // combine them sanely. 555 void EMIT_ALL_THE_THINGS(int *ptr, int *ptr2, int new, _Bool weak, int success, int fail) { 556 __atomic_compare_exchange(ptr, ptr2, &new, weak, success, fail); 557 558 // CHECK: = cmpxchg {{.*}} monotonic monotonic 559 // CHECK: = cmpxchg weak {{.*}} monotonic monotonic 560 // CHECK: = cmpxchg {{.*}} acquire monotonic 561 // CHECK: = cmpxchg {{.*}} acquire acquire 562 // CHECK: = cmpxchg weak {{.*}} acquire monotonic 563 // CHECK: = cmpxchg weak {{.*}} acquire acquire 564 // CHECK: = cmpxchg {{.*}} release monotonic 565 // CHECK: = cmpxchg weak {{.*}} release monotonic 566 // CHECK: = cmpxchg {{.*}} acq_rel monotonic 567 // CHECK: = cmpxchg {{.*}} acq_rel acquire 568 // CHECK: = cmpxchg weak {{.*}} acq_rel monotonic 569 // CHECK: = cmpxchg weak {{.*}} acq_rel acquire 570 // CHECK: = cmpxchg {{.*}} seq_cst monotonic 571 // CHECK: = cmpxchg {{.*}} seq_cst acquire 572 // CHECK: = cmpxchg {{.*}} seq_cst seq_cst 573 // CHECK: = cmpxchg weak {{.*}} seq_cst monotonic 574 // CHECK: = cmpxchg weak {{.*}} seq_cst acquire 575 // CHECK: = cmpxchg weak {{.*}} seq_cst seq_cst 576 } 577 578 int PR21643() { 579 return __atomic_or_fetch((int __attribute__((address_space(257))) *)0x308, 1, 580 __ATOMIC_RELAXED); 581 // CHECK: %[[atomictmp:.*]] = alloca i32, align 4 582 // CHECK: %[[atomicdst:.*]] = alloca i32, align 4 583 // CHECK: store i32 1, i32* %[[atomictmp]] 584 // CHECK: %[[one:.*]] = load i32, i32* %[[atomictmp]], align 4 585 // CHECK: %[[old:.*]] = atomicrmw or i32 addrspace(257)* inttoptr (i32 776 to i32 addrspace(257)*), i32 %[[one]] monotonic 586 // CHECK: %[[new:.*]] = or i32 %[[old]], %[[one]] 587 // CHECK: store i32 %[[new]], i32* %[[atomicdst]], align 4 588 // CHECK: %[[ret:.*]] = load i32, i32* %[[atomicdst]], align 4 589 // CHECK: ret i32 %[[ret]] 590 } 591 592 int PR17306_1(volatile _Atomic(int) *i) { 593 // CHECK-LABEL: @PR17306_1 594 // CHECK: %[[i_addr:.*]] = alloca i32 595 // CHECK-NEXT: %[[atomicdst:.*]] = alloca i32 596 // CHECK-NEXT: store i32* %i, i32** %[[i_addr]] 597 // CHECK-NEXT: %[[addr:.*]] = load i32*, i32** %[[i_addr]] 598 // CHECK-NEXT: %[[res:.*]] = load atomic volatile i32, i32* %[[addr]] seq_cst 599 // CHECK-NEXT: store i32 %[[res]], i32* %[[atomicdst]] 600 // CHECK-NEXT: %[[retval:.*]] = load i32, i32* %[[atomicdst]] 601 // CHECK-NEXT: ret i32 %[[retval]] 602 return __c11_atomic_load(i, memory_order_seq_cst); 603 } 604 605 int PR17306_2(volatile int *i, int value) { 606 // CHECK-LABEL: @PR17306_2 607 // CHECK: %[[i_addr:.*]] = alloca i32* 608 // CHECK-NEXT: %[[value_addr:.*]] = alloca i32 609 // CHECK-NEXT: %[[atomictmp:.*]] = alloca i32 610 // CHECK-NEXT: %[[atomicdst:.*]] = alloca i32 611 // CHECK-NEXT: store i32* %i, i32** %[[i_addr]] 612 // CHECK-NEXT: store i32 %value, i32* %[[value_addr]] 613 // CHECK-NEXT: %[[i_lval:.*]] = load i32*, i32** %[[i_addr]] 614 // CHECK-NEXT: %[[value:.*]] = load i32, i32* %[[value_addr]] 615 // CHECK-NEXT: store i32 %[[value]], i32* %[[atomictmp]] 616 // CHECK-NEXT: %[[value_lval:.*]] = load i32, i32* %[[atomictmp]] 617 // CHECK-NEXT: %[[old_val:.*]] = atomicrmw volatile add i32* %[[i_lval]], i32 %[[value_lval]] seq_cst 618 // CHECK-NEXT: %[[new_val:.*]] = add i32 %[[old_val]], %[[value_lval]] 619 // CHECK-NEXT: store i32 %[[new_val]], i32* %[[atomicdst]] 620 // CHECK-NEXT: %[[retval:.*]] = load i32, i32* %[[atomicdst]] 621 // CHECK-NEXT: ret i32 %[[retval]] 622 return __atomic_add_fetch(i, value, memory_order_seq_cst); 623 } 624 625 #endif 626
