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 void implicit_store(_Atomic(struct S) *a, struct S s) { 187 // CHECK-LABEL: @implicit_store( 188 // CHECK: store atomic i64 %{{.*}}, i64* %{{.*}} seq_cst, align 8 189 *a = s; 190 } 191 192 struct S implicit_load(_Atomic(struct S) *a) { 193 // CHECK-LABEL: @implicit_load( 194 // CHECK: load atomic i64, i64* %{{.*}} seq_cst, align 8 195 return *a; 196 } 197 198 struct S fd1(struct S *a) { 199 // CHECK-LABEL: @fd1 200 // CHECK: [[RETVAL:%.*]] = alloca %struct.S, align 4 201 // CHECK: bitcast %struct.S* {{.*}} to i64* 202 // CHECK: [[CAST:%.*]] = bitcast %struct.S* [[RETVAL]] to i64* 203 // CHECK: [[CALL:%.*]] = call i64 @__atomic_load_8( 204 // CHECK: store i64 [[CALL]], i64* [[CAST]], align 4 205 struct S ret; 206 __atomic_load(a, &ret, memory_order_seq_cst); 207 return ret; 208 } 209 210 void fd2(struct S *a, struct S *b) { 211 // CHECK-LABEL: @fd2 212 // CHECK: [[A_ADDR:%.*]] = alloca %struct.S*, align 4 213 // CHECK-NEXT: [[B_ADDR:%.*]] = alloca %struct.S*, align 4 214 // CHECK-NEXT: store %struct.S* %a, %struct.S** [[A_ADDR]], align 4 215 // CHECK-NEXT: store %struct.S* %b, %struct.S** [[B_ADDR]], align 4 216 // CHECK-NEXT: [[LOAD_A_PTR:%.*]] = load %struct.S*, %struct.S** [[A_ADDR]], align 4 217 // CHECK-NEXT: [[LOAD_B_PTR:%.*]] = load %struct.S*, %struct.S** [[B_ADDR]], align 4 218 // CHECK-NEXT: [[COERCED_A_TMP:%.*]] = bitcast %struct.S* [[LOAD_A_PTR]] to i64* 219 // CHECK-NEXT: [[COERCED_B:%.*]] = bitcast %struct.S* [[LOAD_B_PTR]] to i64* 220 // CHECK-NEXT: [[COERCED_A:%.*]] = bitcast i64* [[COERCED_A_TMP]] to i8* 221 // CHECK-NEXT: [[LOAD_B:%.*]] = load i64, i64* [[COERCED_B]], align 4 222 // CHECK-NEXT: call void @__atomic_store_8(i8* [[COERCED_A]], i64 [[LOAD_B]], 223 // CHECK-NEXT: ret void 224 __atomic_store(a, b, memory_order_seq_cst); 225 } 226 227 void fd3(struct S *a, struct S *b, struct S *c) { 228 // CHECK-LABEL: @fd3 229 // CHECK: [[A_ADDR:%.*]] = alloca %struct.S*, align 4 230 // CHECK-NEXT: [[B_ADDR:%.*]] = alloca %struct.S*, align 4 231 // CHECK-NEXT: [[C_ADDR:%.*]] = alloca %struct.S*, align 4 232 // CHECK-NEXT: store %struct.S* %a, %struct.S** [[A_ADDR]], align 4 233 // CHECK-NEXT: store %struct.S* %b, %struct.S** [[B_ADDR]], align 4 234 // CHECK-NEXT: store %struct.S* %c, %struct.S** [[C_ADDR]], align 4 235 // CHECK-NEXT: [[LOAD_A_PTR:%.*]] = load %struct.S*, %struct.S** [[A_ADDR]], align 4 236 // CHECK-NEXT: [[LOAD_B_PTR:%.*]] = load %struct.S*, %struct.S** [[B_ADDR]], align 4 237 // CHECK-NEXT: [[LOAD_C_PTR:%.*]] = load %struct.S*, %struct.S** [[C_ADDR]], align 4 238 // CHECK-NEXT: [[COERCED_A_TMP:%.*]] = bitcast %struct.S* [[LOAD_A_PTR]] to i64* 239 // CHECK-NEXT: [[COERCED_B:%.*]] = bitcast %struct.S* [[LOAD_B_PTR]] to i64* 240 // CHECK-NEXT: [[COERCED_C:%.*]] = bitcast %struct.S* [[LOAD_C_PTR]] to i64* 241 // CHECK-NEXT: [[COERCED_A:%.*]] = bitcast i64* [[COERCED_A_TMP]] to i8* 242 // CHECK-NEXT: [[LOAD_B:%.*]] = load i64, i64* [[COERCED_B]], align 4 243 // CHECK-NEXT: [[CALL:%.*]] = call i64 @__atomic_exchange_8(i8* [[COERCED_A]], i64 [[LOAD_B]], 244 // CHECK-NEXT: store i64 [[CALL]], i64* [[COERCED_C]], align 4 245 246 __atomic_exchange(a, b, c, memory_order_seq_cst); 247 } 248 249 _Bool fd4(struct S *a, struct S *b, struct S *c) { 250 // CHECK-LABEL: @fd4 251 // CHECK: [[A_ADDR:%.*]] = alloca %struct.S*, align 4 252 // CHECK-NEXT: [[B_ADDR:%.*]] = alloca %struct.S*, align 4 253 // CHECK-NEXT: [[C_ADDR:%.*]] = alloca %struct.S*, align 4 254 // CHECK: store %struct.S* %a, %struct.S** [[A_ADDR]], align 4 255 // CHECK-NEXT: store %struct.S* %b, %struct.S** [[B_ADDR]], align 4 256 // CHECK-NEXT: store %struct.S* %c, %struct.S** [[C_ADDR]], align 4 257 // CHECK-NEXT: [[LOAD_A_PTR:%.*]] = load %struct.S*, %struct.S** [[A_ADDR]], align 4 258 // CHECK-NEXT: [[LOAD_B_PTR:%.*]] = load %struct.S*, %struct.S** [[B_ADDR]], align 4 259 // CHECK-NEXT: [[LOAD_C_PTR:%.*]] = load %struct.S*, %struct.S** [[C_ADDR]], align 4 260 // CHECK-NEXT: [[COERCED_A_TMP:%.*]] = bitcast %struct.S* [[LOAD_A_PTR]] to i64* 261 // CHECK-NEXT: [[COERCED_B_TMP:%.*]] = bitcast %struct.S* [[LOAD_B_PTR]] to i64* 262 // CHECK-NEXT: [[COERCED_C:%.*]] = bitcast %struct.S* [[LOAD_C_PTR]] to i64* 263 // CHECK-NEXT: [[COERCED_A:%.*]] = bitcast i64* [[COERCED_A_TMP]] to i8* 264 // CHECK-NEXT: [[COERCED_B:%.*]] = bitcast i64* [[COERCED_B_TMP]] to i8* 265 // CHECK-NEXT: [[LOAD_C:%.*]] = load i64, i64* [[COERCED_C]], align 4 266 // CHECK-NEXT: [[CALL:%.*]] = call zeroext i1 @__atomic_compare_exchange_8(i8* [[COERCED_A]], i8* [[COERCED_B]], i64 [[LOAD_C]] 267 // CHECK-NEXT: ret i1 [[CALL]] 268 return __atomic_compare_exchange(a, b, c, 1, 5, 5); 269 } 270 271 int* fp1(_Atomic(int*) *p) { 272 // CHECK-LABEL: @fp1 273 // CHECK: load atomic i32, i32* {{.*}} seq_cst 274 return __c11_atomic_load(p, memory_order_seq_cst); 275 } 276 277 int* fp2(_Atomic(int*) *p) { 278 // CHECK-LABEL: @fp2 279 // CHECK: store i32 4 280 // CHECK: atomicrmw add {{.*}} monotonic 281 return __c11_atomic_fetch_add(p, 1, memory_order_relaxed); 282 } 283 284 int *fp2a(int **p) { 285 // CHECK-LABEL: @fp2a 286 // CHECK: store i32 4 287 // CHECK: atomicrmw sub {{.*}} monotonic 288 // Note, the GNU builtins do not multiply by sizeof(T)! 289 return __atomic_fetch_sub(p, 4, memory_order_relaxed); 290 } 291 292 _Complex float fc(_Atomic(_Complex float) *c) { 293 // CHECK-LABEL: @fc 294 // CHECK: atomicrmw xchg i64* 295 return __c11_atomic_exchange(c, 2, memory_order_seq_cst); 296 } 297 298 typedef struct X { int x; } X; 299 X fs(_Atomic(X) *c) { 300 // CHECK-LABEL: @fs 301 // CHECK: atomicrmw xchg i32* 302 return __c11_atomic_exchange(c, (X){2}, memory_order_seq_cst); 303 } 304 305 X fsa(X *c, X *d) { 306 // CHECK-LABEL: @fsa 307 // CHECK: atomicrmw xchg i32* 308 X ret; 309 __atomic_exchange(c, d, &ret, memory_order_seq_cst); 310 return ret; 311 } 312 313 _Bool fsb(_Bool *c) { 314 // CHECK-LABEL: @fsb 315 // CHECK: atomicrmw xchg i8* 316 return __atomic_exchange_n(c, 1, memory_order_seq_cst); 317 } 318 319 char flag1; 320 volatile char flag2; 321 void test_and_set() { 322 // CHECK: atomicrmw xchg i8* @flag1, i8 1 seq_cst 323 __atomic_test_and_set(&flag1, memory_order_seq_cst); 324 // CHECK: atomicrmw volatile xchg i8* @flag2, i8 1 acquire 325 __atomic_test_and_set(&flag2, memory_order_acquire); 326 // CHECK: store atomic volatile i8 0, i8* @flag2 release 327 __atomic_clear(&flag2, memory_order_release); 328 // CHECK: store atomic i8 0, i8* @flag1 seq_cst 329 __atomic_clear(&flag1, memory_order_seq_cst); 330 } 331 332 struct Sixteen { 333 char c[16]; 334 } sixteen; 335 struct Seventeen { 336 char c[17]; 337 } seventeen; 338 339 struct Incomplete; 340 341 int lock_free(struct Incomplete *incomplete) { 342 // CHECK-LABEL: @lock_free 343 344 // CHECK: call i32 @__atomic_is_lock_free(i32 3, i8* null) 345 __c11_atomic_is_lock_free(3); 346 347 // CHECK: call i32 @__atomic_is_lock_free(i32 16, i8* {{.*}}@sixteen{{.*}}) 348 __atomic_is_lock_free(16, &sixteen); 349 350 // CHECK: call i32 @__atomic_is_lock_free(i32 17, i8* {{.*}}@seventeen{{.*}}) 351 __atomic_is_lock_free(17, &seventeen); 352 353 // CHECK: call i32 @__atomic_is_lock_free(i32 4, {{.*}}) 354 __atomic_is_lock_free(4, incomplete); 355 356 char cs[20]; 357 // CHECK: call i32 @__atomic_is_lock_free(i32 4, {{.*}}) 358 __atomic_is_lock_free(4, cs+1); 359 360 // CHECK-NOT: call 361 __atomic_always_lock_free(3, 0); 362 __atomic_always_lock_free(16, 0); 363 __atomic_always_lock_free(17, 0); 364 __atomic_always_lock_free(16, &sixteen); 365 __atomic_always_lock_free(17, &seventeen); 366 367 int n; 368 __atomic_is_lock_free(4, &n); 369 370 // CHECK: ret i32 1 371 return __c11_atomic_is_lock_free(sizeof(_Atomic(int))); 372 } 373 374 // Tests for atomic operations on big values. These should call the functions 375 // defined here: 376 // http://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary#The_Library_interface 377 378 struct foo { 379 int big[128]; 380 }; 381 struct bar { 382 char c[3]; 383 }; 384 385 struct bar smallThing, thing1, thing2; 386 struct foo bigThing; 387 _Atomic(struct foo) bigAtomic; 388 389 void structAtomicStore() { 390 // CHECK-LABEL: @structAtomicStore 391 struct foo f = {0}; 392 struct bar b = {0}; 393 __atomic_store(&smallThing, &b, 5); 394 // CHECK: call void @__atomic_store(i32 3, i8* {{.*}} @smallThing 395 396 __atomic_store(&bigThing, &f, 5); 397 // CHECK: call void @__atomic_store(i32 512, i8* {{.*}} @bigThing 398 } 399 void structAtomicLoad() { 400 // CHECK-LABEL: @structAtomicLoad 401 struct bar b; 402 __atomic_load(&smallThing, &b, 5); 403 // CHECK: call void @__atomic_load(i32 3, i8* {{.*}} @smallThing 404 405 struct foo f = {0}; 406 __atomic_load(&bigThing, &f, 5); 407 // CHECK: call void @__atomic_load(i32 512, i8* {{.*}} @bigThing 408 } 409 struct foo structAtomicExchange() { 410 // CHECK-LABEL: @structAtomicExchange 411 struct foo f = {0}; 412 struct foo old; 413 __atomic_exchange(&f, &bigThing, &old, 5); 414 // CHECK: call void @__atomic_exchange(i32 512, {{.*}}, i8* bitcast ({{.*}} @bigThing to i8*), 415 416 return __c11_atomic_exchange(&bigAtomic, f, 5); 417 // CHECK: call void @__atomic_exchange(i32 512, i8* bitcast ({{.*}} @bigAtomic to i8*), 418 } 419 int structAtomicCmpExchange() { 420 // CHECK-LABEL: @structAtomicCmpExchange 421 // CHECK: %[[x_mem:.*]] = alloca i8 422 _Bool x = __atomic_compare_exchange(&smallThing, &thing1, &thing2, 1, 5, 5); 423 // CHECK: %[[call1:.*]] = call zeroext i1 @__atomic_compare_exchange(i32 3, {{.*}} @smallThing{{.*}} @thing1{{.*}} @thing2 424 // CHECK: %[[zext1:.*]] = zext i1 %[[call1]] to i8 425 // CHECK: store i8 %[[zext1]], i8* %[[x_mem]], align 1 426 // CHECK: %[[x:.*]] = load i8, i8* %[[x_mem]] 427 // CHECK: %[[x_bool:.*]] = trunc i8 %[[x]] to i1 428 // CHECK: %[[conv1:.*]] = zext i1 %[[x_bool]] to i32 429 430 struct foo f = {0}; 431 struct foo g = {0}; 432 g.big[12] = 12; 433 return x & __c11_atomic_compare_exchange_strong(&bigAtomic, &f, g, 5, 5); 434 // CHECK: %[[call2:.*]] = call zeroext i1 @__atomic_compare_exchange(i32 512, i8* bitcast ({{.*}} @bigAtomic to i8*), 435 // CHECK: %[[conv2:.*]] = zext i1 %[[call2]] to i32 436 // CHECK: %[[and:.*]] = and i32 %[[conv1]], %[[conv2]] 437 // CHECK: ret i32 %[[and]] 438 } 439 440 // Check that no atomic operations are used in any initialisation of _Atomic 441 // types. 442 _Atomic(int) atomic_init_i = 42; 443 444 // CHECK-LABEL: @atomic_init_foo 445 void atomic_init_foo() 446 { 447 // CHECK-NOT: } 448 // CHECK-NOT: atomic 449 // CHECK: store 450 _Atomic(int) j = 12; 451 452 // CHECK-NOT: } 453 // CHECK-NOT: atomic 454 // CHECK: store 455 __c11_atomic_init(&j, 42); 456 457 // CHECK-NOT: atomic 458 // CHECK: } 459 } 460 461 // CHECK-LABEL: @failureOrder 462 void failureOrder(_Atomic(int) *ptr, int *ptr2) { 463 __c11_atomic_compare_exchange_strong(ptr, ptr2, 43, memory_order_acquire, memory_order_relaxed); 464 // CHECK: cmpxchg i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} acquire monotonic 465 466 __c11_atomic_compare_exchange_weak(ptr, ptr2, 43, memory_order_seq_cst, memory_order_acquire); 467 // CHECK: cmpxchg weak i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} seq_cst acquire 468 469 // Unknown ordering: conservatively pick strongest valid option (for now!). 470 __atomic_compare_exchange(ptr2, ptr2, ptr2, 0, memory_order_acq_rel, *ptr2); 471 // CHECK: cmpxchg i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} acq_rel acquire 472 473 // Undefined behaviour: don't really care what that last ordering is so leave 474 // it out: 475 __atomic_compare_exchange_n(ptr2, ptr2, 43, 1, memory_order_seq_cst, 42); 476 // CHECK: cmpxchg weak i32* {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z._]+}}, i32 {{%[0-9A-Za-z_.]+}} seq_cst 477 } 478 479 // CHECK-LABEL: @generalFailureOrder 480 void generalFailureOrder(_Atomic(int) *ptr, int *ptr2, int success, int fail) { 481 __c11_atomic_compare_exchange_strong(ptr, ptr2, 42, success, fail); 482 // CHECK: switch i32 {{.*}}, label %[[MONOTONIC:[0-9a-zA-Z._]+]] [ 483 // CHECK-NEXT: i32 1, label %[[ACQUIRE:[0-9a-zA-Z._]+]] 484 // CHECK-NEXT: i32 2, label %[[ACQUIRE]] 485 // CHECK-NEXT: i32 3, label %[[RELEASE:[0-9a-zA-Z._]+]] 486 // CHECK-NEXT: i32 4, label %[[ACQREL:[0-9a-zA-Z._]+]] 487 // CHECK-NEXT: i32 5, label %[[SEQCST:[0-9a-zA-Z._]+]] 488 489 // CHECK: [[MONOTONIC]] 490 // CHECK: switch {{.*}}, label %[[MONOTONIC_MONOTONIC:[0-9a-zA-Z._]+]] [ 491 // CHECK-NEXT: ] 492 493 // CHECK: [[ACQUIRE]] 494 // CHECK: switch {{.*}}, label %[[ACQUIRE_MONOTONIC:[0-9a-zA-Z._]+]] [ 495 // CHECK-NEXT: i32 1, label %[[ACQUIRE_ACQUIRE:[0-9a-zA-Z._]+]] 496 // CHECK-NEXT: i32 2, label %[[ACQUIRE_ACQUIRE:[0-9a-zA-Z._]+]] 497 // CHECK-NEXT: ] 498 499 // CHECK: [[RELEASE]] 500 // CHECK: switch {{.*}}, label %[[RELEASE_MONOTONIC:[0-9a-zA-Z._]+]] [ 501 // CHECK-NEXT: ] 502 503 // CHECK: [[ACQREL]] 504 // CHECK: switch {{.*}}, label %[[ACQREL_MONOTONIC:[0-9a-zA-Z._]+]] [ 505 // CHECK-NEXT: i32 1, label %[[ACQREL_ACQUIRE:[0-9a-zA-Z._]+]] 506 // CHECK-NEXT: i32 2, label %[[ACQREL_ACQUIRE:[0-9a-zA-Z._]+]] 507 // CHECK-NEXT: ] 508 509 // CHECK: [[SEQCST]] 510 // CHECK: switch {{.*}}, label %[[SEQCST_MONOTONIC:[0-9a-zA-Z._]+]] [ 511 // CHECK-NEXT: i32 1, label %[[SEQCST_ACQUIRE:[0-9a-zA-Z._]+]] 512 // CHECK-NEXT: i32 2, label %[[SEQCST_ACQUIRE:[0-9a-zA-Z._]+]] 513 // CHECK-NEXT: i32 5, label %[[SEQCST_SEQCST:[0-9a-zA-Z._]+]] 514 // CHECK-NEXT: ] 515 516 // CHECK: [[MONOTONIC_MONOTONIC]] 517 // CHECK: cmpxchg {{.*}} monotonic monotonic 518 // CHECK: br 519 520 // CHECK: [[ACQUIRE_MONOTONIC]] 521 // CHECK: cmpxchg {{.*}} acquire monotonic 522 // CHECK: br 523 524 // CHECK: [[ACQUIRE_ACQUIRE]] 525 // CHECK: cmpxchg {{.*}} acquire acquire 526 // CHECK: br 527 528 // CHECK: [[ACQREL_MONOTONIC]] 529 // CHECK: cmpxchg {{.*}} acq_rel monotonic 530 // CHECK: br 531 532 // CHECK: [[ACQREL_ACQUIRE]] 533 // CHECK: cmpxchg {{.*}} acq_rel acquire 534 // CHECK: br 535 536 // CHECK: [[SEQCST_MONOTONIC]] 537 // CHECK: cmpxchg {{.*}} seq_cst monotonic 538 // CHECK: br 539 540 // CHECK: [[SEQCST_ACQUIRE]] 541 // CHECK: cmpxchg {{.*}} seq_cst acquire 542 // CHECK: br 543 544 // CHECK: [[SEQCST_SEQCST]] 545 // CHECK: cmpxchg {{.*}} seq_cst seq_cst 546 // CHECK: br 547 } 548 549 void generalWeakness(int *ptr, int *ptr2, _Bool weak) { 550 __atomic_compare_exchange_n(ptr, ptr2, 42, weak, memory_order_seq_cst, memory_order_seq_cst); 551 // CHECK: switch i1 {{.*}}, label %[[WEAK:[0-9a-zA-Z._]+]] [ 552 // CHECK-NEXT: i1 false, label %[[STRONG:[0-9a-zA-Z._]+]] 553 554 // CHECK: [[STRONG]] 555 // CHECK-NOT: br 556 // CHECK: cmpxchg {{.*}} seq_cst seq_cst 557 // CHECK: br 558 559 // CHECK: [[WEAK]] 560 // CHECK-NOT: br 561 // CHECK: cmpxchg weak {{.*}} seq_cst seq_cst 562 // CHECK: br 563 } 564 565 // Having checked the flow in the previous two cases, we'll trust clang to 566 // combine them sanely. 567 void EMIT_ALL_THE_THINGS(int *ptr, int *ptr2, int new, _Bool weak, int success, int fail) { 568 __atomic_compare_exchange(ptr, ptr2, &new, weak, success, fail); 569 570 // CHECK: = cmpxchg {{.*}} monotonic monotonic 571 // CHECK: = cmpxchg weak {{.*}} monotonic monotonic 572 // CHECK: = cmpxchg {{.*}} acquire monotonic 573 // CHECK: = cmpxchg {{.*}} acquire acquire 574 // CHECK: = cmpxchg weak {{.*}} acquire monotonic 575 // CHECK: = cmpxchg weak {{.*}} acquire acquire 576 // CHECK: = cmpxchg {{.*}} release monotonic 577 // CHECK: = cmpxchg weak {{.*}} release monotonic 578 // CHECK: = cmpxchg {{.*}} acq_rel monotonic 579 // CHECK: = cmpxchg {{.*}} acq_rel acquire 580 // CHECK: = cmpxchg weak {{.*}} acq_rel monotonic 581 // CHECK: = cmpxchg weak {{.*}} acq_rel acquire 582 // CHECK: = cmpxchg {{.*}} seq_cst monotonic 583 // CHECK: = cmpxchg {{.*}} seq_cst acquire 584 // CHECK: = cmpxchg {{.*}} seq_cst seq_cst 585 // CHECK: = cmpxchg weak {{.*}} seq_cst monotonic 586 // CHECK: = cmpxchg weak {{.*}} seq_cst acquire 587 // CHECK: = cmpxchg weak {{.*}} seq_cst seq_cst 588 } 589 590 int PR21643() { 591 return __atomic_or_fetch((int __attribute__((address_space(257))) *)0x308, 1, 592 __ATOMIC_RELAXED); 593 // CHECK: %[[atomictmp:.*]] = alloca i32, align 4 594 // CHECK: %[[atomicdst:.*]] = alloca i32, align 4 595 // CHECK: store i32 1, i32* %[[atomictmp]] 596 // CHECK: %[[one:.*]] = load i32, i32* %[[atomictmp]], align 4 597 // CHECK: %[[old:.*]] = atomicrmw or i32 addrspace(257)* inttoptr (i32 776 to i32 addrspace(257)*), i32 %[[one]] monotonic 598 // CHECK: %[[new:.*]] = or i32 %[[old]], %[[one]] 599 // CHECK: store i32 %[[new]], i32* %[[atomicdst]], align 4 600 // CHECK: %[[ret:.*]] = load i32, i32* %[[atomicdst]], align 4 601 // CHECK: ret i32 %[[ret]] 602 } 603 604 int PR17306_1(volatile _Atomic(int) *i) { 605 // CHECK-LABEL: @PR17306_1 606 // CHECK: %[[i_addr:.*]] = alloca i32 607 // CHECK-NEXT: %[[atomicdst:.*]] = alloca i32 608 // CHECK-NEXT: store i32* %i, i32** %[[i_addr]] 609 // CHECK-NEXT: %[[addr:.*]] = load i32*, i32** %[[i_addr]] 610 // CHECK-NEXT: %[[res:.*]] = load atomic volatile i32, i32* %[[addr]] seq_cst 611 // CHECK-NEXT: store i32 %[[res]], i32* %[[atomicdst]] 612 // CHECK-NEXT: %[[retval:.*]] = load i32, i32* %[[atomicdst]] 613 // CHECK-NEXT: ret i32 %[[retval]] 614 return __c11_atomic_load(i, memory_order_seq_cst); 615 } 616 617 int PR17306_2(volatile int *i, int value) { 618 // CHECK-LABEL: @PR17306_2 619 // CHECK: %[[i_addr:.*]] = alloca i32* 620 // CHECK-NEXT: %[[value_addr:.*]] = alloca i32 621 // CHECK-NEXT: %[[atomictmp:.*]] = alloca i32 622 // CHECK-NEXT: %[[atomicdst:.*]] = alloca i32 623 // CHECK-NEXT: store i32* %i, i32** %[[i_addr]] 624 // CHECK-NEXT: store i32 %value, i32* %[[value_addr]] 625 // CHECK-NEXT: %[[i_lval:.*]] = load i32*, i32** %[[i_addr]] 626 // CHECK-NEXT: %[[value:.*]] = load i32, i32* %[[value_addr]] 627 // CHECK-NEXT: store i32 %[[value]], i32* %[[atomictmp]] 628 // CHECK-NEXT: %[[value_lval:.*]] = load i32, i32* %[[atomictmp]] 629 // CHECK-NEXT: %[[old_val:.*]] = atomicrmw volatile add i32* %[[i_lval]], i32 %[[value_lval]] seq_cst 630 // CHECK-NEXT: %[[new_val:.*]] = add i32 %[[old_val]], %[[value_lval]] 631 // CHECK-NEXT: store i32 %[[new_val]], i32* %[[atomicdst]] 632 // CHECK-NEXT: %[[retval:.*]] = load i32, i32* %[[atomicdst]] 633 // CHECK-NEXT: ret i32 %[[retval]] 634 return __atomic_add_fetch(i, value, memory_order_seq_cst); 635 } 636 637 #endif 638