1; RUN: opt -objc-arc -S < %s | FileCheck %s 2 3target datalayout = "e-p:64:64:64" 4 5declare i8* @objc_retain(i8*) 6declare void @objc_release(i8*) 7declare i8* @objc_autorelease(i8*) 8declare void @objc_autoreleasePoolPop(i8*) 9declare void @objc_autoreleasePoolPush() 10declare i8* @objc_retainBlock(i8*) 11 12declare i8* @objc_retainedObject(i8*) 13declare i8* @objc_unretainedObject(i8*) 14declare i8* @objc_unretainedPointer(i8*) 15 16declare void @use_pointer(i8*) 17declare void @callee() 18declare void @callee_fnptr(void ()*) 19declare void @invokee() 20declare i8* @returner() 21 22declare void @llvm.dbg.value(metadata, i64, metadata) 23 24declare i8* @objc_msgSend(i8*, i8*, ...) 25 26; Simple retain+release pair deletion, with some intervening control 27; flow and harmless instructions. 28 29; CHECK: define void @test0( 30; CHECK-NOT: @objc_ 31; CHECK: } 32define void @test0(i32* %x, i1 %p) nounwind { 33entry: 34 %a = bitcast i32* %x to i8* 35 %0 = call i8* @objc_retain(i8* %a) nounwind 36 br i1 %p, label %t, label %f 37 38t: 39 store i8 3, i8* %a 40 %b = bitcast i32* %x to float* 41 store float 2.0, float* %b 42 br label %return 43 44f: 45 store i32 7, i32* %x 46 br label %return 47 48return: 49 %c = bitcast i32* %x to i8* 50 call void @objc_release(i8* %c) nounwind 51 ret void 52} 53 54; Like test0 but the release isn't always executed when the retain is, 55; so the optimization is not safe. 56 57; TODO: Make the objc_release's argument be %0. 58 59; CHECK: define void @test1( 60; CHECK: @objc_retain(i8* %a) 61; CHECK: @objc_release 62; CHECK: } 63define void @test1(i32* %x, i1 %p, i1 %q) nounwind { 64entry: 65 %a = bitcast i32* %x to i8* 66 %0 = call i8* @objc_retain(i8* %a) nounwind 67 br i1 %p, label %t, label %f 68 69t: 70 store i8 3, i8* %a 71 %b = bitcast i32* %x to float* 72 store float 2.0, float* %b 73 br label %return 74 75f: 76 store i32 7, i32* %x 77 call void @callee() 78 br i1 %q, label %return, label %alt_return 79 80return: 81 %c = bitcast i32* %x to i8* 82 call void @objc_release(i8* %c) nounwind 83 ret void 84 85alt_return: 86 ret void 87} 88 89; Like test0 but the pointer is passed to an intervening call, 90; so the optimization is not safe. 91 92; CHECK: define void @test2( 93; CHECK: @objc_retain(i8* %a) 94; CHECK: @objc_release 95; CHECK: } 96define void @test2(i32* %x, i1 %p) nounwind { 97entry: 98 %a = bitcast i32* %x to i8* 99 %0 = call i8* @objc_retain(i8* %a) nounwind 100 br i1 %p, label %t, label %f 101 102t: 103 store i8 3, i8* %a 104 %b = bitcast i32* %x to float* 105 store float 2.0, float* %b 106 br label %return 107 108f: 109 store i32 7, i32* %x 110 call void @use_pointer(i8* %0) 111 %d = bitcast i32* %x to float* 112 store float 3.0, float* %d 113 br label %return 114 115return: 116 %c = bitcast i32* %x to i8* 117 call void @objc_release(i8* %c) nounwind 118 ret void 119} 120 121; Like test0 but the release is in a loop, 122; so the optimization is not safe. 123 124; TODO: For now, assume this can't happen. 125 126; CHECK: define void @test3( 127; TODO: @objc_retain(i8* %a) 128; TODO: @objc_release 129; CHECK: } 130define void @test3(i32* %x, i1* %q) nounwind { 131entry: 132 %a = bitcast i32* %x to i8* 133 %0 = call i8* @objc_retain(i8* %a) nounwind 134 br label %loop 135 136loop: 137 %c = bitcast i32* %x to i8* 138 call void @objc_release(i8* %c) nounwind 139 %j = volatile load i1* %q 140 br i1 %j, label %loop, label %return 141 142return: 143 ret void 144} 145 146; TODO: For now, assume this can't happen. 147 148; Like test0 but the retain is in a loop, 149; so the optimization is not safe. 150 151; CHECK: define void @test4( 152; TODO: @objc_retain(i8* %a) 153; TODO: @objc_release 154; CHECK: } 155define void @test4(i32* %x, i1* %q) nounwind { 156entry: 157 br label %loop 158 159loop: 160 %a = bitcast i32* %x to i8* 161 %0 = call i8* @objc_retain(i8* %a) nounwind 162 %j = volatile load i1* %q 163 br i1 %j, label %loop, label %return 164 165return: 166 %c = bitcast i32* %x to i8* 167 call void @objc_release(i8* %c) nounwind 168 ret void 169} 170 171; Like test0 but the pointer is conditionally passed to an intervening call, 172; so the optimization is not safe. 173 174; CHECK: define void @test5( 175; CHECK: @objc_retain(i8* 176; CHECK: @objc_release 177; CHECK: } 178define void @test5(i32* %x, i1 %q, i8* %y) nounwind { 179entry: 180 %a = bitcast i32* %x to i8* 181 %0 = call i8* @objc_retain(i8* %a) nounwind 182 %s = select i1 %q, i8* %y, i8* %0 183 call void @use_pointer(i8* %s) 184 store i32 7, i32* %x 185 %c = bitcast i32* %x to i8* 186 call void @objc_release(i8* %c) nounwind 187 ret void 188} 189 190; retain+release pair deletion, where the release happens on two different 191; flow paths. 192 193; CHECK: define void @test6( 194; CHECK-NOT: @objc_ 195; CHECK: } 196define void @test6(i32* %x, i1 %p) nounwind { 197entry: 198 %a = bitcast i32* %x to i8* 199 %0 = call i8* @objc_retain(i8* %a) nounwind 200 br i1 %p, label %t, label %f 201 202t: 203 store i8 3, i8* %a 204 %b = bitcast i32* %x to float* 205 store float 2.0, float* %b 206 %ct = bitcast i32* %x to i8* 207 call void @objc_release(i8* %ct) nounwind 208 br label %return 209 210f: 211 store i32 7, i32* %x 212 call void @callee() 213 %cf = bitcast i32* %x to i8* 214 call void @objc_release(i8* %cf) nounwind 215 br label %return 216 217return: 218 ret void 219} 220 221; retain+release pair deletion, where the retain happens on two different 222; flow paths. 223 224; CHECK: define void @test7( 225; CHECK-NOT: @objc_ 226; CHECK: } 227define void @test7(i32* %x, i1 %p) nounwind { 228entry: 229 %a = bitcast i32* %x to i8* 230 br i1 %p, label %t, label %f 231 232t: 233 %0 = call i8* @objc_retain(i8* %a) nounwind 234 store i8 3, i8* %a 235 %b = bitcast i32* %x to float* 236 store float 2.0, float* %b 237 br label %return 238 239f: 240 %1 = call i8* @objc_retain(i8* %a) nounwind 241 store i32 7, i32* %x 242 call void @callee() 243 br label %return 244 245return: 246 %c = bitcast i32* %x to i8* 247 call void @objc_release(i8* %c) nounwind 248 ret void 249} 250 251; Like test7, but there's a retain/retainBlock mismatch. Don't delete! 252 253; CHECK: define void @test7b 254; CHECK: t: 255; CHECK: call i8* @objc_retainBlock 256; CHECK: f: 257; CHECK: call i8* @objc_retain 258; CHECK: return: 259; CHECK: call void @objc_release 260; CHECK: } 261define void @test7b(i32* %x, i1 %p) nounwind { 262entry: 263 %a = bitcast i32* %x to i8* 264 br i1 %p, label %t, label %f 265 266t: 267 %0 = call i8* @objc_retainBlock(i8* %a) nounwind 268 store i8 3, i8* %a 269 %b = bitcast i32* %x to float* 270 store float 2.0, float* %b 271 br label %return 272 273f: 274 %1 = call i8* @objc_retain(i8* %a) nounwind 275 store i32 7, i32* %x 276 call void @callee() 277 br label %return 278 279return: 280 %c = bitcast i32* %x to i8* 281 call void @objc_release(i8* %c) nounwind 282 ret void 283} 284 285; retain+release pair deletion, where the retain and release both happen on 286; different flow paths. Wild! 287 288; CHECK: define void @test8( 289; CHECK-NOT: @objc_ 290; CHECK: } 291define void @test8(i32* %x, i1 %p, i1 %q) nounwind { 292entry: 293 %a = bitcast i32* %x to i8* 294 br i1 %p, label %t, label %f 295 296t: 297 %0 = call i8* @objc_retain(i8* %a) nounwind 298 store i8 3, i8* %a 299 %b = bitcast i32* %x to float* 300 store float 2.0, float* %b 301 br label %mid 302 303f: 304 %1 = call i8* @objc_retain(i8* %a) nounwind 305 store i32 7, i32* %x 306 br label %mid 307 308mid: 309 br i1 %q, label %u, label %g 310 311u: 312 call void @callee() 313 %cu = bitcast i32* %x to i8* 314 call void @objc_release(i8* %cu) nounwind 315 br label %return 316 317g: 318 %cg = bitcast i32* %x to i8* 319 call void @objc_release(i8* %cg) nounwind 320 br label %return 321 322return: 323 ret void 324} 325 326; Trivial retain+release pair deletion. 327 328; CHECK: define void @test9( 329; CHECK-NOT: @objc_ 330; CHECK: } 331define void @test9(i8* %x) nounwind { 332entry: 333 %0 = call i8* @objc_retain(i8* %x) nounwind 334 call void @objc_release(i8* %0) nounwind 335 ret void 336} 337 338; Retain+release pair, but on an unknown pointer relationship. Don't delete! 339 340; CHECK: define void @test9b 341; CHECK: @objc_retain(i8* %x) 342; CHECK: @objc_release(i8* %s) 343; CHECK: } 344define void @test9b(i8* %x, i1 %j, i8* %p) nounwind { 345entry: 346 %0 = call i8* @objc_retain(i8* %x) nounwind 347 %s = select i1 %j, i8* %x, i8* %p 348 call void @objc_release(i8* %s) nounwind 349 ret void 350} 351 352; Trivial retain+release pair with intervening calls - don't delete! 353 354; CHECK: define void @test10( 355; CHECK: @objc_retain(i8* %x) 356; CHECK: @use_pointer 357; CHECK: @objc_release 358; CHECK: } 359define void @test10(i8* %x) nounwind { 360entry: 361 %0 = call i8* @objc_retain(i8* %x) nounwind 362 call void @use_pointer(i8* %x) 363 call void @use_pointer(i8* %x) 364 call void @objc_release(i8* %0) nounwind 365 ret void 366} 367 368; Trivial retain+autoreleaserelease pair. Don't delete! 369; Also, add a tail keyword, since objc_retain can never be passed 370; a stack argument. 371 372; CHECK: define void @test11( 373; CHECK: tail call i8* @objc_retain(i8* %x) nounwind 374; CHECK: tail call i8* @objc_autorelease(i8* %0) nounwind 375; CHECK: } 376define void @test11(i8* %x) nounwind { 377entry: 378 %0 = call i8* @objc_retain(i8* %x) nounwind 379 call i8* @objc_autorelease(i8* %0) nounwind 380 call void @use_pointer(i8* %x) 381 ret void 382} 383 384; Same as test11 but with no use_pointer call. Delete the pair! 385 386; CHECK: define void @test11a( 387; CHECK: entry: 388; CHECK-NEXT: ret void 389; CHECK: } 390define void @test11a(i8* %x) nounwind { 391entry: 392 %0 = call i8* @objc_retain(i8* %x) nounwind 393 call i8* @objc_autorelease(i8* %0) nounwind 394 ret void 395} 396 397; Same as test11 but the value is returned. Do an RV optimization. 398 399; CHECK: define i8* @test11b( 400; CHECK: tail call i8* @objc_retain(i8* %x) nounwind 401; CHECK: tail call i8* @objc_autoreleaseReturnValue(i8* %0) nounwind 402; CHECK: } 403define i8* @test11b(i8* %x) nounwind { 404entry: 405 %0 = call i8* @objc_retain(i8* %x) nounwind 406 call i8* @objc_autorelease(i8* %0) nounwind 407 ret i8* %x 408} 409 410; Trivial retain,release pair with intervening call, but it's dominated 411; by another retain - delete! 412 413; CHECK: define void @test12( 414; CHECK-NEXT: entry: 415; CHECK-NEXT: @objc_retain(i8* %x) 416; CHECK-NOT: @objc_ 417; CHECK: } 418define void @test12(i8* %x, i64 %n) { 419entry: 420 call i8* @objc_retain(i8* %x) nounwind 421 call i8* @objc_retain(i8* %x) nounwind 422 call void @use_pointer(i8* %x) 423 call void @use_pointer(i8* %x) 424 call void @objc_release(i8* %x) nounwind 425 ret void 426} 427 428; Trivial retain,autorelease pair. Don't delete! 429 430; CHECK: define void @test13( 431; CHECK: tail call i8* @objc_retain(i8* %x) nounwind 432; CHECK: tail call i8* @objc_retain(i8* %x) nounwind 433; CHECK: @use_pointer(i8* %x) 434; CHECK: tail call i8* @objc_autorelease(i8* %x) nounwind 435; CHECK: } 436define void @test13(i8* %x, i64 %n) { 437entry: 438 call i8* @objc_retain(i8* %x) nounwind 439 call i8* @objc_retain(i8* %x) nounwind 440 call void @use_pointer(i8* %x) 441 call i8* @objc_autorelease(i8* %x) nounwind 442 ret void 443} 444 445; Delete the retain+release pair. 446 447; CHECK: define void @test13b 448; CHECK-NEXT: entry: 449; CHECK-NEXT: @objc_retain(i8* %x) 450; CHECK-NEXT: @use_pointer 451; CHECK-NEXT: @use_pointer 452; CHECK-NEXT: ret void 453define void @test13b(i8* %x, i64 %n) { 454entry: 455 call i8* @objc_retain(i8* %x) nounwind 456 call i8* @objc_retain(i8* %x) nounwind 457 call void @use_pointer(i8* %x) 458 call void @use_pointer(i8* %x) 459 call void @objc_release(i8* %x) nounwind 460 ret void 461} 462 463; Don't delete the retain+release pair because there's an 464; autoreleasePoolPop in the way. 465 466; CHECK: define void @test13c 467; CHECK: @objc_retain(i8* %x) 468; CHECK: @objc_autoreleasePoolPop 469; CHECK: @objc_retain(i8* %x) 470; CHECK: @use_pointer 471; CHECK: @objc_release 472; CHECK: } 473define void @test13c(i8* %x, i64 %n) { 474entry: 475 call i8* @objc_retain(i8* %x) nounwind 476 call void @objc_autoreleasePoolPop(i8* undef) 477 call i8* @objc_retain(i8* %x) nounwind 478 call void @use_pointer(i8* %x) 479 call void @use_pointer(i8* %x) 480 call void @objc_release(i8* %x) nounwind 481 ret void 482} 483 484; Like test13c, but there's an autoreleasePoolPush in the way, but that 485; doesn't matter. 486 487; CHECK: define void @test13d 488; CHECK-NEXT: entry: 489; CHECK-NEXT: @objc_retain(i8* %x) 490; CHECK-NEXT: @objc_autoreleasePoolPush 491; CHECK-NEXT: @use_pointer 492; CHECK-NEXT: @use_pointer 493; CHECK-NEXT: ret void 494define void @test13d(i8* %x, i64 %n) { 495entry: 496 call i8* @objc_retain(i8* %x) nounwind 497 call void @objc_autoreleasePoolPush() 498 call i8* @objc_retain(i8* %x) nounwind 499 call void @use_pointer(i8* %x) 500 call void @use_pointer(i8* %x) 501 call void @objc_release(i8* %x) nounwind 502 ret void 503} 504 505; Trivial retain,release pair with intervening call, but it's post-dominated 506; by another release - delete! 507 508; CHECK: define void @test14( 509; CHECK-NEXT: entry: 510; CHECK-NEXT: @use_pointer 511; CHECK-NEXT: @use_pointer 512; CHECK-NEXT: @objc_release 513; CHECK-NEXT: ret void 514; CHECK-NEXT: } 515define void @test14(i8* %x, i64 %n) { 516entry: 517 call i8* @objc_retain(i8* %x) nounwind 518 call void @use_pointer(i8* %x) 519 call void @use_pointer(i8* %x) 520 call void @objc_release(i8* %x) nounwind 521 call void @objc_release(i8* %x) nounwind 522 ret void 523} 524 525; Trivial retain,autorelease pair with intervening call, but it's post-dominated 526; by another release. Don't delete anything. 527 528; CHECK: define void @test15( 529; CHECK-NEXT: entry: 530; CHECK-NEXT: @objc_retain(i8* %x) 531; CHECK-NEXT: @use_pointer 532; CHECK-NEXT: @objc_autorelease(i8* %x) 533; CHECK-NEXT: @objc_release 534; CHECK-NEXT: ret void 535; CHECK-NEXT: } 536define void @test15(i8* %x, i64 %n) { 537entry: 538 call i8* @objc_retain(i8* %x) nounwind 539 call void @use_pointer(i8* %x) 540 call i8* @objc_autorelease(i8* %x) nounwind 541 call void @objc_release(i8* %x) nounwind 542 ret void 543} 544 545; Trivial retain,autorelease pair, post-dominated 546; by another release. Delete the retain and release. 547 548; CHECK: define void @test15b 549; CHECK-NEXT: entry: 550; CHECK-NEXT: @objc_autorelease 551; CHECK-NEXT: ret void 552; CHECK-NEXT: } 553define void @test15b(i8* %x, i64 %n) { 554entry: 555 call i8* @objc_retain(i8* %x) nounwind 556 call i8* @objc_autorelease(i8* %x) nounwind 557 call void @objc_release(i8* %x) nounwind 558 ret void 559} 560 561; Retain+release pairs in diamonds, all dominated by a retain. 562 563; CHECK: define void @test16( 564; CHECK: @objc_retain(i8* %x) 565; CHECK-NOT: @objc 566; CHECK: } 567define void @test16(i1 %a, i1 %b, i8* %x) { 568entry: 569 call i8* @objc_retain(i8* %x) nounwind 570 br i1 %a, label %red, label %orange 571 572red: 573 call i8* @objc_retain(i8* %x) nounwind 574 br label %yellow 575 576orange: 577 call i8* @objc_retain(i8* %x) nounwind 578 br label %yellow 579 580yellow: 581 call void @use_pointer(i8* %x) 582 call void @use_pointer(i8* %x) 583 br i1 %b, label %green, label %blue 584 585green: 586 call void @objc_release(i8* %x) nounwind 587 br label %purple 588 589blue: 590 call void @objc_release(i8* %x) nounwind 591 br label %purple 592 593purple: 594 ret void 595} 596 597; Retain+release pairs in diamonds, all post-dominated by a release. 598 599; CHECK: define void @test17( 600; CHECK-NOT: @objc_ 601; CHECK: purple: 602; CHECK: @objc_release 603; CHECK: } 604define void @test17(i1 %a, i1 %b, i8* %x) { 605entry: 606 br i1 %a, label %red, label %orange 607 608red: 609 call i8* @objc_retain(i8* %x) nounwind 610 br label %yellow 611 612orange: 613 call i8* @objc_retain(i8* %x) nounwind 614 br label %yellow 615 616yellow: 617 call void @use_pointer(i8* %x) 618 call void @use_pointer(i8* %x) 619 br i1 %b, label %green, label %blue 620 621green: 622 call void @objc_release(i8* %x) nounwind 623 br label %purple 624 625blue: 626 call void @objc_release(i8* %x) nounwind 627 br label %purple 628 629purple: 630 call void @objc_release(i8* %x) nounwind 631 ret void 632} 633 634; Delete no-ops. 635 636; CHECK: define void @test18( 637; CHECK-NOT: @objc_ 638; CHECK: } 639define void @test18() { 640 call i8* @objc_retain(i8* null) 641 call void @objc_release(i8* null) 642 call i8* @objc_autorelease(i8* null) 643 ret void 644} 645 646; Delete no-ops where undef can be assumed to be null. 647 648; CHECK: define void @test18b 649; CHECK-NOT: @objc_ 650; CHECK: } 651define void @test18b() { 652 call i8* @objc_retain(i8* undef) 653 call void @objc_release(i8* undef) 654 call i8* @objc_autorelease(i8* undef) 655 ret void 656} 657 658; Replace uses of arguments with uses of return values, to reduce 659; register pressure. 660 661; CHECK: define void @test19(i32* %y) { 662; CHECK: %z = bitcast i32* %y to i8* 663; CHECK: %0 = bitcast i32* %y to i8* 664; CHECK: %1 = tail call i8* @objc_retain(i8* %0) 665; CHECK: call void @use_pointer(i8* %z) 666; CHECK: call void @use_pointer(i8* %z) 667; CHECK: %2 = bitcast i32* %y to i8* 668; CHECK: call void @objc_release(i8* %2) 669; CHECK: ret void 670; CHECK: } 671define void @test19(i32* %y) { 672entry: 673 %x = bitcast i32* %y to i8* 674 %0 = call i8* @objc_retain(i8* %x) nounwind 675 %z = bitcast i32* %y to i8* 676 call void @use_pointer(i8* %z) 677 call void @use_pointer(i8* %z) 678 call void @objc_release(i8* %x) 679 ret void 680} 681 682; Bitcast insertion 683 684; CHECK: define void @test20( 685; CHECK: %tmp1 = tail call i8* @objc_retain(i8* %tmp) nounwind 686; CHECK-NEXT: invoke 687define void @test20(double* %self) { 688if.then12: 689 %tmp = bitcast double* %self to i8* 690 %tmp1 = call i8* @objc_retain(i8* %tmp) nounwind 691 invoke void @invokee() 692 to label %invoke.cont23 unwind label %lpad20 693 694invoke.cont23: ; preds = %if.then12 695 invoke void @invokee() 696 to label %if.end unwind label %lpad20 697 698lpad20: ; preds = %invoke.cont23, %if.then12 699 %tmp502 = phi double* [ undef, %invoke.cont23 ], [ %self, %if.then12 ] 700 unreachable 701 702if.end: ; preds = %invoke.cont23 703 ret void 704} 705 706; Delete a redundant retain,autorelease when forwaring a call result 707; directly to a return value. 708 709; CHECK: define i8* @test21( 710; CHECK: call i8* @returner() 711; CHECK-NEXT: ret i8* %call 712define i8* @test21() { 713entry: 714 %call = call i8* @returner() 715 %0 = call i8* @objc_retain(i8* %call) nounwind 716 %1 = call i8* @objc_autorelease(i8* %0) nounwind 717 ret i8* %1 718} 719 720; Move an objc call up through a phi that has null operands. 721 722; CHECK: define void @test22( 723; CHECK: B: 724; CHECK: %1 = bitcast double* %p to i8* 725; CHECK: call void @objc_release(i8* %1) 726; CHECK: br label %C 727; CHECK: C: ; preds = %B, %A 728; CHECK-NOT: @objc_release 729; CHECK: } 730define void @test22(double* %p, i1 %a) { 731 br i1 %a, label %A, label %B 732A: 733 br label %C 734B: 735 br label %C 736C: 737 %h = phi double* [ null, %A ], [ %p, %B ] 738 %c = bitcast double* %h to i8* 739 call void @objc_release(i8* %c) 740 ret void 741} 742 743; Optimize objc_retainBlock. 744 745; CHECK: define void @test23( 746; CHECK-NOT: @objc_ 747; CHECK: } 748%block0 = type { i64, i64, i8*, i8* } 749%block1 = type { i8**, i32, i32, i32 (%struct.__block_literal_1*)*, %block0* } 750%struct.__block_descriptor = type { i64, i64 } 751%struct.__block_literal_1 = type { i8**, i32, i32, i8**, %struct.__block_descriptor* } 752@__block_holder_tmp_1 = external constant %block1 753define void @test23() { 754entry: 755 %0 = call i8* @objc_retainBlock(i8* bitcast (%block1* @__block_holder_tmp_1 to i8*)) nounwind 756 call void @bar(i32 ()* bitcast (%block1* @__block_holder_tmp_1 to i32 ()*)) 757 call void @bar(i32 ()* bitcast (%block1* @__block_holder_tmp_1 to i32 ()*)) 758 call void @objc_release(i8* bitcast (%block1* @__block_holder_tmp_1 to i8*)) nounwind 759 ret void 760} 761 762; Don't optimize objc_retainBlock. 763 764; CHECK: define void @test23b 765; CHECK: @objc_retainBlock 766; CHECK: @objc_release 767; CHECK: } 768define void @test23b(i8* %p) { 769entry: 770 %0 = call i8* @objc_retainBlock(i8* %p) nounwind 771 call void @use_pointer(i8* %p) 772 call void @use_pointer(i8* %p) 773 call void @objc_release(i8* %p) nounwind 774 ret void 775} 776 777; Any call can decrement a retain count. 778 779; CHECK: define void @test24( 780; CHECK: @objc_retain(i8* %a) 781; CHECK: @objc_release 782; CHECK: } 783define void @test24(i8* %r, i8* %a) { 784 call i8* @objc_retain(i8* %a) 785 call void @use_pointer(i8* %r) 786 %q = load i8* %a 787 call void @objc_release(i8* %a) 788 ret void 789} 790 791; Don't move a retain/release pair if the release can be moved 792; but the retain can't be moved to balance it. 793 794; CHECK: define void @test25( 795; CHECK: entry: 796; CHECK: call i8* @objc_retain(i8* %p) 797; CHECK: true: 798; CHECK: done: 799; CHECK: call void @objc_release(i8* %p) 800; CHECK: } 801define void @test25(i8* %p, i1 %x) { 802entry: 803 %f0 = call i8* @objc_retain(i8* %p) 804 call void @callee() 805 br i1 %x, label %true, label %done 806 807true: 808 store i8 0, i8* %p 809 br label %done 810 811done: 812 call void @objc_release(i8* %p) 813 ret void 814} 815 816; Don't move a retain/release pair if the retain can be moved 817; but the release can't be moved to balance it. 818 819; CHECK: define void @test26( 820; CHECK: entry: 821; CHECK: call i8* @objc_retain(i8* %p) 822; CHECK: true: 823; CHECK: done: 824; CHECK: call void @objc_release(i8* %p) 825; CHECK: } 826define void @test26(i8* %p, i1 %x) { 827entry: 828 %f0 = call i8* @objc_retain(i8* %p) 829 br i1 %x, label %true, label %done 830 831true: 832 call void @callee() 833 br label %done 834 835done: 836 store i8 0, i8* %p 837 call void @objc_release(i8* %p) 838 ret void 839} 840 841; Don't sink the retain,release into the loop. 842 843; CHECK: define void @test27( 844; CHECK: entry: 845; CHECK: call i8* @objc_retain(i8* %p) 846; CHECK: loop: 847; CHECK-NOT: @objc_ 848; CHECK: done: 849; CHECK: call void @objc_release 850; CHECK: } 851define void @test27(i8* %p, i1 %x, i1 %y) { 852entry: 853 %f0 = call i8* @objc_retain(i8* %p) 854 br i1 %x, label %loop, label %done 855 856loop: 857 call void @callee() 858 store i8 0, i8* %p 859 br i1 %y, label %done, label %loop 860 861done: 862 call void @objc_release(i8* %p) 863 ret void 864} 865 866; Trivial code motion case: Triangle. 867 868; CHECK: define void @test28( 869; CHECK-NOT: @objc_ 870; CHECK: true: 871; CHECK: call i8* @objc_retain( 872; CHECK: call void @callee() 873; CHECK: store 874; CHECK: call void @objc_release 875; CHECK: done: 876; CHECK-NOT: @objc_ 877; CHECK: } 878define void @test28(i8* %p, i1 %x) { 879entry: 880 %f0 = call i8* @objc_retain(i8* %p) 881 br i1 %x, label %true, label %done 882 883true: 884 call void @callee() 885 store i8 0, i8* %p 886 br label %done 887 888done: 889 call void @objc_release(i8* %p), !clang.imprecise_release !0 890 ret void 891} 892 893; Trivial code motion case: Triangle, but no metadata. Don't move past 894; unrelated memory references! 895 896; CHECK: define void @test28b 897; CHECK: call i8* @objc_retain( 898; CHECK: true: 899; CHECK-NOT: @objc_ 900; CHECK: call void @callee() 901; CHECK-NOT: @objc_ 902; CHECK: store 903; CHECK-NOT: @objc_ 904; CHECK: done: 905; CHECK: @objc_release 906; CHECK: } 907define void @test28b(i8* %p, i1 %x, i8* noalias %t) { 908entry: 909 %f0 = call i8* @objc_retain(i8* %p) 910 br i1 %x, label %true, label %done 911 912true: 913 call void @callee() 914 store i8 0, i8* %p 915 br label %done 916 917done: 918 store i8 0, i8* %t 919 call void @objc_release(i8* %p) 920 ret void 921} 922 923; Trivial code motion case: Triangle, with metadata. Do move past 924; unrelated memory references! And preserve the metadata. 925 926; CHECK: define void @test28c 927; CHECK-NOT: @objc_ 928; CHECK: true: 929; CHECK: call i8* @objc_retain( 930; CHECK: call void @callee() 931; CHECK: store 932; CHECK: call void @objc_release(i8* %p) nounwind, !clang.imprecise_release 933; CHECK: done: 934; CHECK-NOT: @objc_ 935; CHECK: } 936define void @test28c(i8* %p, i1 %x, i8* noalias %t) { 937entry: 938 %f0 = call i8* @objc_retain(i8* %p) 939 br i1 %x, label %true, label %done 940 941true: 942 call void @callee() 943 store i8 0, i8* %p 944 br label %done 945 946done: 947 store i8 0, i8* %t 948 call void @objc_release(i8* %p), !clang.imprecise_release !0 949 ret void 950} 951 952; Like test28. but with two releases. 953 954; CHECK: define void @test29( 955; CHECK-NOT: @objc_ 956; CHECK: true: 957; CHECK: call i8* @objc_retain( 958; CHECK: call void @callee() 959; CHECK: store 960; CHECK: call void @objc_release 961; CHECK-NOT: @objc_release 962; CHECK: done: 963; CHECK-NOT: @objc_ 964; CHECK: ohno: 965; CHECK-NOT: @objc_ 966; CHECK: } 967define void @test29(i8* %p, i1 %x, i1 %y) { 968entry: 969 %f0 = call i8* @objc_retain(i8* %p) 970 br i1 %x, label %true, label %done 971 972true: 973 call void @callee() 974 store i8 0, i8* %p 975 br i1 %y, label %done, label %ohno 976 977done: 978 call void @objc_release(i8* %p) 979 ret void 980 981ohno: 982 call void @objc_release(i8* %p) 983 ret void 984} 985 986; Basic case with the use and call in a diamond 987; with an extra release. 988 989; CHECK: define void @test30( 990; CHECK-NOT: @objc_ 991; CHECK: true: 992; CHECK: call i8* @objc_retain( 993; CHECK: call void @callee() 994; CHECK: store 995; CHECK: call void @objc_release 996; CHECK-NOT: @objc_release 997; CHECK: false: 998; CHECK-NOT: @objc_ 999; CHECK: done: 1000; CHECK-NOT: @objc_ 1001; CHECK: ohno: 1002; CHECK-NOT: @objc_ 1003; CHECK: } 1004define void @test30(i8* %p, i1 %x, i1 %y, i1 %z) { 1005entry: 1006 %f0 = call i8* @objc_retain(i8* %p) 1007 br i1 %x, label %true, label %false 1008 1009true: 1010 call void @callee() 1011 store i8 0, i8* %p 1012 br i1 %y, label %done, label %ohno 1013 1014false: 1015 br i1 %z, label %done, label %ohno 1016 1017done: 1018 call void @objc_release(i8* %p) 1019 ret void 1020 1021ohno: 1022 call void @objc_release(i8* %p) 1023 ret void 1024} 1025 1026; Basic case with a mergeable release. 1027 1028; CHECK: define void @test31( 1029; CHECK: call i8* @objc_retain(i8* %p) 1030; CHECK: call void @callee() 1031; CHECK: store 1032; CHECK: call void @objc_release 1033; CHECK-NOT: @objc_release 1034; CHECK: true: 1035; CHECK-NOT: @objc_release 1036; CHECK: false: 1037; CHECK-NOT: @objc_release 1038; CHECK: ret void 1039; CHECK-NOT: @objc_release 1040; CHECK: } 1041define void @test31(i8* %p, i1 %x) { 1042entry: 1043 %f0 = call i8* @objc_retain(i8* %p) 1044 call void @callee() 1045 store i8 0, i8* %p 1046 br i1 %x, label %true, label %false 1047true: 1048 call void @objc_release(i8* %p) 1049 ret void 1050false: 1051 call void @objc_release(i8* %p) 1052 ret void 1053} 1054 1055; Don't consider bitcasts or getelementptrs direct uses. 1056 1057; CHECK: define void @test32( 1058; CHECK-NOT: @objc_ 1059; CHECK: true: 1060; CHECK: call i8* @objc_retain( 1061; CHECK: call void @callee() 1062; CHECK: store 1063; CHECK: call void @objc_release 1064; CHECK: done: 1065; CHECK-NOT: @objc_ 1066; CHECK: } 1067define void @test32(i8* %p, i1 %x) { 1068entry: 1069 %f0 = call i8* @objc_retain(i8* %p) 1070 br i1 %x, label %true, label %done 1071 1072true: 1073 call void @callee() 1074 store i8 0, i8* %p 1075 br label %done 1076 1077done: 1078 %g = bitcast i8* %p to i8* 1079 %h = getelementptr i8* %g, i64 0 1080 call void @objc_release(i8* %g) 1081 ret void 1082} 1083 1084; Do consider icmps to be direct uses. 1085 1086; CHECK: define void @test33( 1087; CHECK-NOT: @objc_ 1088; CHECK: true: 1089; CHECK: call i8* @objc_retain( 1090; CHECK: call void @callee() 1091; CHECK: icmp 1092; CHECK: call void @objc_release 1093; CHECK: done: 1094; CHECK-NOT: @objc_ 1095; CHECK: } 1096define void @test33(i8* %p, i1 %x, i8* %y) { 1097entry: 1098 %f0 = call i8* @objc_retain(i8* %p) 1099 br i1 %x, label %true, label %done 1100 1101true: 1102 call void @callee() 1103 %v = icmp eq i8* %p, %y 1104 br label %done 1105 1106done: 1107 %g = bitcast i8* %p to i8* 1108 %h = getelementptr i8* %g, i64 0 1109 call void @objc_release(i8* %g) 1110 ret void 1111} 1112 1113; Delete retain,release if there's just a possible dec. 1114 1115; CHECK: define void @test34( 1116; CHECK-NOT: @objc_ 1117; CHECK: } 1118define void @test34(i8* %p, i1 %x, i8* %y) { 1119entry: 1120 %f0 = call i8* @objc_retain(i8* %p) 1121 br i1 %x, label %true, label %done 1122 1123true: 1124 call void @callee() 1125 br label %done 1126 1127done: 1128 %g = bitcast i8* %p to i8* 1129 %h = getelementptr i8* %g, i64 0 1130 call void @objc_release(i8* %g) 1131 ret void 1132} 1133 1134; Delete retain,release if there's just a use. 1135 1136; CHECK: define void @test35( 1137; CHECK-NOT: @objc_ 1138; CHECK: } 1139define void @test35(i8* %p, i1 %x, i8* %y) { 1140entry: 1141 %f0 = call i8* @objc_retain(i8* %p) 1142 br i1 %x, label %true, label %done 1143 1144true: 1145 %v = icmp eq i8* %p, %y 1146 br label %done 1147 1148done: 1149 %g = bitcast i8* %p to i8* 1150 %h = getelementptr i8* %g, i64 0 1151 call void @objc_release(i8* %g) 1152 ret void 1153} 1154 1155; Delete a retain,release if there's no actual use. 1156 1157; CHECK: define void @test36( 1158; CHECK-NOT: @objc_ 1159; CHECK: call void @callee() 1160; CHECK-NOT: @objc_ 1161; CHECK: call void @callee() 1162; CHECK-NOT: @objc_ 1163; CHECK: } 1164define void @test36(i8* %p) { 1165entry: 1166 call i8* @objc_retain(i8* %p) 1167 call void @callee() 1168 call void @callee() 1169 call void @objc_release(i8* %p) 1170 ret void 1171} 1172 1173; Like test36, but with metadata. 1174 1175; CHECK: define void @test37( 1176; CHECK-NOT: @objc_ 1177; CHECK: } 1178define void @test37(i8* %p) { 1179entry: 1180 call i8* @objc_retain(i8* %p) 1181 call void @callee() 1182 call void @callee() 1183 call void @objc_release(i8* %p), !clang.imprecise_release !0 1184 ret void 1185} 1186 1187; Be aggressive about analyzing phis to eliminate possible uses. 1188 1189; CHECK: define void @test38( 1190; CHECK-NOT: @objc_ 1191; CHECK: } 1192define void @test38(i8* %p, i1 %u, i1 %m, i8* %z, i8* %y, i8* %x, i8* %w) { 1193entry: 1194 call i8* @objc_retain(i8* %p) 1195 br i1 %u, label %true, label %false 1196true: 1197 br i1 %m, label %a, label %b 1198false: 1199 br i1 %m, label %c, label %d 1200a: 1201 br label %e 1202b: 1203 br label %e 1204c: 1205 br label %f 1206d: 1207 br label %f 1208e: 1209 %j = phi i8* [ %z, %a ], [ %y, %b ] 1210 br label %g 1211f: 1212 %k = phi i8* [ %w, %c ], [ %x, %d ] 1213 br label %g 1214g: 1215 %h = phi i8* [ %j, %e ], [ %k, %f ] 1216 call void @use_pointer(i8* %h) 1217 call void @objc_release(i8* %p), !clang.imprecise_release !0 1218 ret void 1219} 1220 1221; Delete retain,release pairs around loops. 1222 1223; CHECK: define void @test39( 1224; CHECK_NOT: @objc_ 1225; CHECK: } 1226define void @test39(i8* %p) { 1227entry: 1228 %0 = call i8* @objc_retain(i8* %p) 1229 br label %loop 1230 1231loop: ; preds = %loop, %entry 1232 br i1 undef, label %loop, label %exit 1233 1234exit: ; preds = %loop 1235 call void @objc_release(i8* %0), !clang.imprecise_release !0 1236 ret void 1237} 1238 1239; Delete retain,release pairs around loops containing uses. 1240 1241; CHECK: define void @test39b( 1242; CHECK_NOT: @objc_ 1243; CHECK: } 1244define void @test39b(i8* %p) { 1245entry: 1246 %0 = call i8* @objc_retain(i8* %p) 1247 br label %loop 1248 1249loop: ; preds = %loop, %entry 1250 store i8 0, i8* %0 1251 br i1 undef, label %loop, label %exit 1252 1253exit: ; preds = %loop 1254 call void @objc_release(i8* %0), !clang.imprecise_release !0 1255 ret void 1256} 1257 1258; Delete retain,release pairs around loops containing potential decrements. 1259 1260; CHECK: define void @test39c( 1261; CHECK_NOT: @objc_ 1262; CHECK: } 1263define void @test39c(i8* %p) { 1264entry: 1265 %0 = call i8* @objc_retain(i8* %p) 1266 br label %loop 1267 1268loop: ; preds = %loop, %entry 1269 call void @use_pointer(i8* %0) 1270 br i1 undef, label %loop, label %exit 1271 1272exit: ; preds = %loop 1273 call void @objc_release(i8* %0), !clang.imprecise_release !0 1274 ret void 1275} 1276 1277; Delete retain,release pairs around loops even if 1278; the successors are in a different order. 1279 1280; CHECK: define void @test40( 1281; CHECK_NOT: @objc_ 1282; CHECK: } 1283define void @test40(i8* %p) { 1284entry: 1285 %0 = call i8* @objc_retain(i8* %p) 1286 br label %loop 1287 1288loop: ; preds = %loop, %entry 1289 call void @use_pointer(i8* %0) 1290 br i1 undef, label %exit, label %loop 1291 1292exit: ; preds = %loop 1293 call void @objc_release(i8* %0), !clang.imprecise_release !0 1294 ret void 1295} 1296 1297; Do the known-incremented retain+release elimination even if the pointer 1298; is also autoreleased. 1299 1300; CHECK: define void @test42( 1301; CHECK-NEXT: entry: 1302; CHECK-NEXT: call i8* @objc_retain(i8* %p) 1303; CHECK-NEXT: call i8* @objc_autorelease(i8* %p) 1304; CHECK-NEXT: call void @use_pointer(i8* %p) 1305; CHECK-NEXT: call void @use_pointer(i8* %p) 1306; CHECK-NEXT: ret void 1307; CHECK-NEXT: } 1308define void @test42(i8* %p) { 1309entry: 1310 call i8* @objc_retain(i8* %p) 1311 call i8* @objc_autorelease(i8* %p) 1312 call i8* @objc_retain(i8* %p) 1313 call void @use_pointer(i8* %p) 1314 call void @use_pointer(i8* %p) 1315 call void @objc_release(i8* %p) 1316 ret void 1317} 1318 1319; Don't the known-incremented retain+release elimination if the pointer is 1320; autoreleased and there's an autoreleasePoolPop. 1321 1322; CHECK: define void @test43( 1323; CHECK-NEXT: entry: 1324; CHECK-NEXT: call i8* @objc_retain(i8* %p) 1325; CHECK-NEXT: call i8* @objc_autorelease(i8* %p) 1326; CHECK-NEXT: call i8* @objc_retain 1327; CHECK-NEXT: call void @use_pointer(i8* %p) 1328; CHECK-NEXT: call void @use_pointer(i8* %p) 1329; CHECK-NEXT: call void @objc_autoreleasePoolPop(i8* undef) 1330; CHECK-NEXT: call void @objc_release 1331; CHECK-NEXT: ret void 1332; CHECK-NEXT: } 1333define void @test43(i8* %p) { 1334entry: 1335 call i8* @objc_retain(i8* %p) 1336 call i8* @objc_autorelease(i8* %p) 1337 call i8* @objc_retain(i8* %p) 1338 call void @use_pointer(i8* %p) 1339 call void @use_pointer(i8* %p) 1340 call void @objc_autoreleasePoolPop(i8* undef) 1341 call void @objc_release(i8* %p) 1342 ret void 1343} 1344 1345; Do the known-incremented retain+release elimination if the pointer is 1346; autoreleased and there's an autoreleasePoolPush. 1347 1348; CHECK: define void @test43b 1349; CHECK-NEXT: entry: 1350; CHECK-NEXT: call i8* @objc_retain(i8* %p) 1351; CHECK-NEXT: call i8* @objc_autorelease(i8* %p) 1352; CHECK-NEXT: call void @use_pointer(i8* %p) 1353; CHECK-NEXT: call void @use_pointer(i8* %p) 1354; CHECK-NEXT: call void @objc_autoreleasePoolPush() 1355; CHECK-NEXT: ret void 1356; CHECK-NEXT: } 1357define void @test43b(i8* %p) { 1358entry: 1359 call i8* @objc_retain(i8* %p) 1360 call i8* @objc_autorelease(i8* %p) 1361 call i8* @objc_retain(i8* %p) 1362 call void @use_pointer(i8* %p) 1363 call void @use_pointer(i8* %p) 1364 call void @objc_autoreleasePoolPush() 1365 call void @objc_release(i8* %p) 1366 ret void 1367} 1368 1369; Do retain+release elimination for non-provenance pointers. 1370 1371; CHECK: define void @test44( 1372; CHECK-NOT: objc_ 1373; CHECK: } 1374define void @test44(i8** %pp) { 1375 %p = load i8** %pp 1376 %q = call i8* @objc_retain(i8* %p) 1377 call void @objc_release(i8* %q) 1378 ret void 1379} 1380 1381; Don't delete retain+release with an unknown-provenance 1382; may-alias objc_release between them. 1383 1384; CHECK: define void @test45( 1385; CHECK: call i8* @objc_retain(i8* %p) 1386; CHECK: call void @objc_release(i8* %q) 1387; CHECK: call void @use_pointer(i8* %p) 1388; CHECK: call void @objc_release(i8* %p) 1389define void @test45(i8** %pp, i8** %qq) { 1390 %p = load i8** %pp 1391 %q = load i8** %qq 1392 call i8* @objc_retain(i8* %p) 1393 call void @objc_release(i8* %q) 1394 call void @use_pointer(i8* %p) 1395 call void @objc_release(i8* %p) 1396 ret void 1397} 1398 1399; Don't delete retain and autorelease here. 1400 1401; CHECK: define void @test46( 1402; CHECK: tail call i8* @objc_retain(i8* %p) nounwind 1403; CHECK: true: 1404; CHECK: tail call i8* @objc_autorelease(i8* %p) nounwind 1405define void @test46(i8* %p, i1 %a) { 1406entry: 1407 call i8* @objc_retain(i8* %p) 1408 br i1 %a, label %true, label %false 1409 1410true: 1411 call i8* @objc_autorelease(i8* %p) 1412 call void @use_pointer(i8* %p) 1413 ret void 1414 1415false: 1416 ret void 1417} 1418 1419; Delete no-op cast calls. 1420 1421; CHECK: define i8* @test47( 1422; CHECK-NOT: call 1423; CHECK: ret i8* %p 1424define i8* @test47(i8* %p) nounwind { 1425 %x = call i8* @objc_retainedObject(i8* %p) 1426 ret i8* %x 1427} 1428 1429; Delete no-op cast calls. 1430 1431; CHECK: define i8* @test48( 1432; CHECK-NOT: call 1433; CHECK: ret i8* %p 1434define i8* @test48(i8* %p) nounwind { 1435 %x = call i8* @objc_unretainedObject(i8* %p) 1436 ret i8* %x 1437} 1438 1439; Delete no-op cast calls. 1440 1441; CHECK: define i8* @test49( 1442; CHECK-NOT: call 1443; CHECK: ret i8* %p 1444define i8* @test49(i8* %p) nounwind { 1445 %x = call i8* @objc_unretainedPointer(i8* %p) 1446 ret i8* %x 1447} 1448 1449; Do delete retain+release with intervening stores of the 1450; address value; 1451 1452; CHECK: define void @test50( 1453; CHECK-NOT: @objc_ 1454; CHECK: } 1455define void @test50(i8* %p, i8** %pp) { 1456 call i8* @objc_retain(i8* %p) 1457 call void @callee() 1458 store i8* %p, i8** %pp 1459 call void @objc_release(i8* %p) 1460 ret void 1461} 1462 1463; Don't delete retain+release with intervening stores through the 1464; address value. 1465 1466; CHECK: define void @test51( 1467; CHECK: call i8* @objc_retain(i8* %p) 1468; CHECK: call void @objc_release(i8* %p) 1469define void @test51(i8* %p) { 1470 call i8* @objc_retain(i8* %p) 1471 call void @callee() 1472 store i8 0, i8* %p 1473 call void @objc_release(i8* %p) 1474 ret void 1475} 1476 1477; Don't delete retain+release with intervening use of a pointer of 1478; unknown provenance. 1479 1480; CHECK: define void @test52( 1481; CHECK: call i8* @objc_retain 1482; CHECK: call void @callee() 1483; CHECK: call void @use_pointer(i8* %z) 1484; CHECK: call void @objc_release 1485define void @test52(i8** %zz, i8** %pp) { 1486 %p = load i8** %pp 1487 %1 = call i8* @objc_retain(i8* %p) 1488 call void @callee() 1489 %z = load i8** %zz 1490 call void @use_pointer(i8* %z) 1491 call void @objc_release(i8* %p) 1492 ret void 1493} 1494 1495; Like test52, but the pointer has function type, so it's assumed to 1496; be not reference counted. 1497 1498; CHECK: define void @test53( 1499; CHECK-NOT: @objc_ 1500; CHECK: } 1501define void @test53(void ()** %zz, i8** %pp) { 1502 %p = load i8** %pp 1503 %1 = call i8* @objc_retain(i8* %p) 1504 call void @callee() 1505 %z = load void ()** %zz 1506 call void @callee_fnptr(void ()* %z) 1507 call void @objc_release(i8* %p) 1508 ret void 1509} 1510 1511; Convert autorelease to release if the value is unused. 1512 1513; CHECK: define void @test54( 1514; CHECK: call i8* @returner() 1515; CHECK-NEXT: call void @objc_release(i8* %t) nounwind, !clang.imprecise_release !0 1516; CHECK-NEXT: ret void 1517define void @test54() { 1518 %t = call i8* @returner() 1519 call i8* @objc_autorelease(i8* %t) 1520 ret void 1521} 1522 1523; Nested retain+release pairs. Delete them both. 1524 1525; CHECK: define void @test55( 1526; CHECK-NOT: @objc 1527; CHECK: } 1528define void @test55(i8* %x) { 1529entry: 1530 %0 = call i8* @objc_retain(i8* %x) nounwind 1531 %1 = call i8* @objc_retain(i8* %x) nounwind 1532 call void @objc_release(i8* %x) nounwind 1533 call void @objc_release(i8* %x) nounwind 1534 ret void 1535} 1536 1537; Nested retain+release pairs where the inner pair depends 1538; on the outer pair to be removed, and then the outer pair 1539; can be partially eliminated. Plus an extra outer pair to 1540; eliminate, for fun. 1541 1542; CHECK: define void @test56( 1543; CHECK-NOT: @objc 1544; CHECK: if.then: 1545; CHECK-NEXT: %0 = tail call i8* @objc_retain(i8* %x) nounwind 1546; CHECK-NEXT: tail call void @use_pointer(i8* %x) 1547; CHECK-NEXT: tail call void @use_pointer(i8* %x) 1548; CHECK-NEXT: tail call void @objc_release(i8* %x) nounwind, !clang.imprecise_release !0 1549; CHECK-NEXT: br label %if.end 1550; CHECK-NOT: @objc 1551; CHECK: } 1552define void @test56(i8* %x, i32 %n) { 1553entry: 1554 %0 = tail call i8* @objc_retain(i8* %x) nounwind 1555 %1 = tail call i8* @objc_retain(i8* %0) nounwind 1556 %tobool = icmp eq i32 %n, 0 1557 br i1 %tobool, label %if.end, label %if.then 1558 1559if.then: ; preds = %entry 1560 %2 = tail call i8* @objc_retain(i8* %1) nounwind 1561 tail call void @use_pointer(i8* %2) 1562 tail call void @use_pointer(i8* %2) 1563 tail call void @objc_release(i8* %2) nounwind, !clang.imprecise_release !0 1564 br label %if.end 1565 1566if.end: ; preds = %entry, %if.then 1567 tail call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0 1568 tail call void @objc_release(i8* %0) nounwind, !clang.imprecise_release !0 1569 ret void 1570} 1571 1572declare void @bar(i32 ()*) 1573 1574; A few real-world testcases. 1575 1576@.str4 = private unnamed_addr constant [33 x i8] c"-[A z] = { %f, %f, { %f, %f } }\0A\00" 1577@"OBJC_IVAR_$_A.myZ" = global i64 20, section "__DATA, __objc_const", align 8 1578declare i32 @printf(i8* nocapture, ...) nounwind 1579declare i32 @puts(i8* nocapture) nounwind 1580@str = internal constant [16 x i8] c"-[ Top0 _getX ]\00" 1581 1582; CHECK: @"\01-[A z]" 1583; CHECK-NOT: @objc_ 1584; CHECK: } 1585 1586define {<2 x float>, <2 x float>} @"\01-[A z]"({}* %self, i8* nocapture %_cmd) nounwind { 1587invoke.cont: 1588 %0 = bitcast {}* %self to i8* 1589 %1 = tail call i8* @objc_retain(i8* %0) nounwind 1590 tail call void @llvm.dbg.value(metadata !{{}* %self}, i64 0, metadata !0) 1591 tail call void @llvm.dbg.value(metadata !{{}* %self}, i64 0, metadata !0) 1592 %ivar = load i64* @"OBJC_IVAR_$_A.myZ", align 8 1593 %add.ptr = getelementptr i8* %0, i64 %ivar 1594 %tmp1 = bitcast i8* %add.ptr to float* 1595 %tmp2 = load float* %tmp1, align 4 1596 %conv = fpext float %tmp2 to double 1597 %add.ptr.sum = add i64 %ivar, 4 1598 %tmp6 = getelementptr inbounds i8* %0, i64 %add.ptr.sum 1599 %2 = bitcast i8* %tmp6 to float* 1600 %tmp7 = load float* %2, align 4 1601 %conv8 = fpext float %tmp7 to double 1602 %add.ptr.sum36 = add i64 %ivar, 8 1603 %tmp12 = getelementptr inbounds i8* %0, i64 %add.ptr.sum36 1604 %arrayidx = bitcast i8* %tmp12 to float* 1605 %tmp13 = load float* %arrayidx, align 4 1606 %conv14 = fpext float %tmp13 to double 1607 %tmp12.sum = add i64 %ivar, 12 1608 %arrayidx19 = getelementptr inbounds i8* %0, i64 %tmp12.sum 1609 %3 = bitcast i8* %arrayidx19 to float* 1610 %tmp20 = load float* %3, align 4 1611 %conv21 = fpext float %tmp20 to double 1612 %call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([33 x i8]* @.str4, i64 0, i64 0), double %conv, double %conv8, double %conv14, double %conv21) 1613 %ivar23 = load i64* @"OBJC_IVAR_$_A.myZ", align 8 1614 %add.ptr24 = getelementptr i8* %0, i64 %ivar23 1615 %4 = bitcast i8* %add.ptr24 to i128* 1616 %srcval = load i128* %4, align 4 1617 tail call void @objc_release(i8* %0) nounwind 1618 %tmp29 = trunc i128 %srcval to i64 1619 %tmp30 = bitcast i64 %tmp29 to <2 x float> 1620 %tmp31 = insertvalue {<2 x float>, <2 x float>} undef, <2 x float> %tmp30, 0 1621 %tmp32 = lshr i128 %srcval, 64 1622 %tmp33 = trunc i128 %tmp32 to i64 1623 %tmp34 = bitcast i64 %tmp33 to <2 x float> 1624 %tmp35 = insertvalue {<2 x float>, <2 x float>} %tmp31, <2 x float> %tmp34, 1 1625 ret {<2 x float>, <2 x float>} %tmp35 1626} 1627 1628; CHECK: @"\01-[Top0 _getX]" 1629; CHECK-NOT: @objc_ 1630; CHECK: } 1631 1632define i32 @"\01-[Top0 _getX]"({}* %self, i8* nocapture %_cmd) nounwind { 1633invoke.cont: 1634 %0 = bitcast {}* %self to i8* 1635 %1 = tail call i8* @objc_retain(i8* %0) nounwind 1636 %puts = tail call i32 @puts(i8* getelementptr inbounds ([16 x i8]* @str, i64 0, i64 0)) 1637 tail call void @objc_release(i8* %0) nounwind 1638 ret i32 0 1639} 1640 1641@"\01L_OBJC_METH_VAR_NAME_" = internal global [5 x i8] c"frob\00", section "__TEXT,__cstring,cstring_literals", align 1@"\01L_OBJC_SELECTOR_REFERENCES_" = internal global i8* getelementptr inbounds ([5 x i8]* @"\01L_OBJC_METH_VAR_NAME_", i64 0, i64 0), section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1642@"\01L_OBJC_IMAGE_INFO" = internal constant [2 x i32] [i32 0, i32 16], section "__DATA, __objc_imageinfo, regular, no_dead_strip" 1643@llvm.used = appending global [3 x i8*] [i8* getelementptr inbounds ([5 x i8]* @"\01L_OBJC_METH_VAR_NAME_", i32 0, i32 0), i8* bitcast (i8** @"\01L_OBJC_SELECTOR_REFERENCES_" to i8*), i8* bitcast ([2 x i32]* @"\01L_OBJC_IMAGE_INFO" to i8*)], section "llvm.metadata" 1644 1645; A simple loop. Eliminate the retain and release inside of it! 1646 1647; CHECK: define void @loop 1648; CHECK: for.body: 1649; CHECK-NOT: @objc_ 1650; CHECK: @objc_msgSend 1651; CHECK-NOT: @objc_ 1652; CHECK: for.end: 1653define void @loop(i8* %x, i64 %n) { 1654entry: 1655 %0 = tail call i8* @objc_retain(i8* %x) nounwind 1656 %cmp9 = icmp sgt i64 %n, 0 1657 br i1 %cmp9, label %for.body, label %for.end 1658 1659for.body: ; preds = %entry, %for.body 1660 %i.010 = phi i64 [ %inc, %for.body ], [ 0, %entry ] 1661 %1 = tail call i8* @objc_retain(i8* %x) nounwind 1662 %tmp5 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8 1663 %call = tail call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %1, i8* %tmp5) 1664 tail call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0 1665 %inc = add nsw i64 %i.010, 1 1666 %exitcond = icmp eq i64 %inc, %n 1667 br i1 %exitcond, label %for.end, label %for.body 1668 1669for.end: ; preds = %for.body, %entry 1670 tail call void @objc_release(i8* %x) nounwind, !clang.imprecise_release !0 1671 ret void 1672} 1673 1674; ObjCARCOpt can delete the retain,release on self. 1675 1676; CHECK: define void @TextEditTest 1677; CHECK-NOT: call i8* @objc_retain(i8* %tmp7) 1678; CHECK: } 1679 1680%0 = type { i8* (i8*, %struct._message_ref_t*, ...)*, i8* } 1681%1 = type opaque 1682%2 = type opaque 1683%3 = type opaque 1684%4 = type opaque 1685%5 = type opaque 1686%struct.NSConstantString = type { i32*, i32, i8*, i64 } 1687%struct._NSRange = type { i64, i64 } 1688%struct.__CFString = type opaque 1689%struct.__method_list_t = type { i32, i32, [0 x %struct._objc_method] } 1690%struct._class_ro_t = type { i32, i32, i32, i8*, i8*, %struct.__method_list_t*, %struct._objc_protocol_list*, %struct._ivar_list_t*, i8*, %struct._prop_list_t* } 1691%struct._class_t = type { %struct._class_t*, %struct._class_t*, %struct._objc_cache*, i8* (i8*, i8*)**, %struct._class_ro_t* } 1692%struct._ivar_list_t = type { i32, i32, [0 x %struct._ivar_t] } 1693%struct._ivar_t = type { i64*, i8*, i8*, i32, i32 } 1694%struct._message_ref_t = type { i8*, i8* } 1695%struct._objc_cache = type opaque 1696%struct._objc_method = type { i8*, i8*, i8* } 1697%struct._objc_protocol_list = type { i64, [0 x %struct._protocol_t*] } 1698%struct._prop_list_t = type { i32, i32, [0 x %struct._message_ref_t] } 1699%struct._protocol_t = type { i8*, i8*, %struct._objc_protocol_list*, %struct.__method_list_t*, %struct.__method_list_t*, %struct.__method_list_t*, %struct.__method_list_t*, %struct._prop_list_t*, i32, i32 } 1700 1701@"\01L_OBJC_CLASSLIST_REFERENCES_$_17" = external hidden global %struct._class_t*, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 1702@kUTTypePlainText = external constant %struct.__CFString* 1703@"\01L_OBJC_SELECTOR_REFERENCES_19" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1704@"\01L_OBJC_SELECTOR_REFERENCES_21" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1705@"\01L_OBJC_SELECTOR_REFERENCES_23" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1706@"\01L_OBJC_SELECTOR_REFERENCES_25" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1707@"\01L_OBJC_CLASSLIST_REFERENCES_$_26" = external hidden global %struct._class_t*, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 1708@"\01L_OBJC_SELECTOR_REFERENCES_28" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1709@"\01L_OBJC_CLASSLIST_REFERENCES_$_29" = external hidden global %struct._class_t*, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 1710@"\01L_OBJC_SELECTOR_REFERENCES_31" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1711@"\01L_OBJC_SELECTOR_REFERENCES_33" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1712@"\01L_OBJC_SELECTOR_REFERENCES_35" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1713@"\01L_OBJC_SELECTOR_REFERENCES_37" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1714@"\01L_OBJC_CLASSLIST_REFERENCES_$_38" = external hidden global %struct._class_t*, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 1715@"\01L_OBJC_SELECTOR_REFERENCES_40" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1716@"\01L_OBJC_SELECTOR_REFERENCES_42" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1717@_unnamed_cfstring_44 = external hidden constant %struct.NSConstantString, section "__DATA,__cfstring" 1718@"\01L_OBJC_SELECTOR_REFERENCES_46" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1719@"\01L_OBJC_SELECTOR_REFERENCES_48" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1720@"\01l_objc_msgSend_fixup_isEqual_" = external hidden global %0, section "__DATA, __objc_msgrefs, coalesced", align 16 1721@"\01L_OBJC_CLASSLIST_REFERENCES_$_50" = external hidden global %struct._class_t*, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 1722@NSCocoaErrorDomain = external constant %1* 1723@"\01L_OBJC_CLASSLIST_REFERENCES_$_51" = external hidden global %struct._class_t*, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 1724@NSFilePathErrorKey = external constant %1* 1725@"\01L_OBJC_SELECTOR_REFERENCES_53" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1726@"\01L_OBJC_SELECTOR_REFERENCES_55" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1727@"\01L_OBJC_CLASSLIST_REFERENCES_$_56" = external hidden global %struct._class_t*, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 1728@"\01L_OBJC_SELECTOR_REFERENCES_58" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1729@"\01L_OBJC_SELECTOR_REFERENCES_60" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" 1730 1731declare %1* @truncatedString(%1*, i64) 1732define void @TextEditTest(%2* %self, %3* %pboard) { 1733entry: 1734 %err = alloca %4*, align 8 1735 %tmp7 = bitcast %2* %self to i8* 1736 %tmp8 = call i8* @objc_retain(i8* %tmp7) nounwind 1737 store %4* null, %4** %err, align 8 1738 %tmp1 = load %struct._class_t** @"\01L_OBJC_CLASSLIST_REFERENCES_$_17", align 8 1739 %tmp2 = load %struct.__CFString** @kUTTypePlainText, align 8 1740 %tmp3 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_19", align 8 1741 %tmp4 = bitcast %struct._class_t* %tmp1 to i8* 1742 %call5 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp4, i8* %tmp3, %struct.__CFString* %tmp2) 1743 %tmp5 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_21", align 8 1744 %tmp6 = bitcast %3* %pboard to i8* 1745 %call76 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp6, i8* %tmp5, i8* %call5) 1746 %tmp9 = call i8* @objc_retain(i8* %call76) nounwind 1747 %tobool = icmp eq i8* %tmp9, null 1748 br i1 %tobool, label %end, label %land.lhs.true 1749 1750land.lhs.true: ; preds = %entry 1751 %tmp11 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_23", align 8 1752 %call137 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp6, i8* %tmp11, i8* %tmp9) 1753 %tmp = bitcast i8* %call137 to %1* 1754 %tmp10 = call i8* @objc_retain(i8* %call137) nounwind 1755 call void @objc_release(i8* null) nounwind 1756 %tmp12 = call i8* @objc_retain(i8* %call137) nounwind 1757 call void @objc_release(i8* null) nounwind 1758 %tobool16 = icmp eq i8* %call137, null 1759 br i1 %tobool16, label %end, label %if.then 1760 1761if.then: ; preds = %land.lhs.true 1762 %tmp19 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_25", align 8 1763 %call21 = call signext i8 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i8 (i8*, i8*)*)(i8* %call137, i8* %tmp19) 1764 %tobool22 = icmp eq i8 %call21, 0 1765 br i1 %tobool22, label %if.then44, label %land.lhs.true23 1766 1767land.lhs.true23: ; preds = %if.then 1768 %tmp24 = load %struct._class_t** @"\01L_OBJC_CLASSLIST_REFERENCES_$_26", align 8 1769 %tmp26 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_28", align 8 1770 %tmp27 = bitcast %struct._class_t* %tmp24 to i8* 1771 %call2822 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp27, i8* %tmp26, i8* %call137) 1772 %tmp13 = bitcast i8* %call2822 to %5* 1773 %tmp14 = call i8* @objc_retain(i8* %call2822) nounwind 1774 call void @objc_release(i8* null) nounwind 1775 %tobool30 = icmp eq i8* %call2822, null 1776 br i1 %tobool30, label %if.then44, label %if.end 1777 1778if.end: ; preds = %land.lhs.true23 1779 %tmp32 = load %struct._class_t** @"\01L_OBJC_CLASSLIST_REFERENCES_$_29", align 8 1780 %tmp33 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_31", align 8 1781 %tmp34 = bitcast %struct._class_t* %tmp32 to i8* 1782 %call35 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp34, i8* %tmp33) 1783 %tmp37 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_33", align 8 1784 %call3923 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %call35, i8* %tmp37, i8* %call2822, i32 signext 1, %4** %err) 1785 %cmp = icmp eq i8* %call3923, null 1786 br i1 %cmp, label %if.then44, label %end 1787 1788if.then44: ; preds = %if.end, %land.lhs.true23, %if.then 1789 %url.025 = phi %5* [ %tmp13, %if.end ], [ %tmp13, %land.lhs.true23 ], [ null, %if.then ] 1790 %tmp49 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_35", align 8 1791 %call51 = call %struct._NSRange bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to %struct._NSRange (i8*, i8*, i64, i64)*)(i8* %call137, i8* %tmp49, i64 0, i64 0) 1792 %call513 = extractvalue %struct._NSRange %call51, 0 1793 %call514 = extractvalue %struct._NSRange %call51, 1 1794 %tmp52 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_37", align 8 1795 %call548 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %call137, i8* %tmp52, i64 %call513, i64 %call514) 1796 %tmp55 = load %struct._class_t** @"\01L_OBJC_CLASSLIST_REFERENCES_$_38", align 8 1797 %tmp56 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_40", align 8 1798 %tmp57 = bitcast %struct._class_t* %tmp55 to i8* 1799 %call58 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp57, i8* %tmp56) 1800 %tmp59 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_42", align 8 1801 %call6110 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %call548, i8* %tmp59, i8* %call58) 1802 %tmp15 = call i8* @objc_retain(i8* %call6110) nounwind 1803 call void @objc_release(i8* %call137) nounwind 1804 %tmp64 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_46", align 8 1805 %call66 = call signext i8 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i8 (i8*, i8*, %1*)*)(i8* %call6110, i8* %tmp64, %1* bitcast (%struct.NSConstantString* @_unnamed_cfstring_44 to %1*)) 1806 %tobool67 = icmp eq i8 %call66, 0 1807 br i1 %tobool67, label %if.end74, label %if.then68 1808 1809if.then68: ; preds = %if.then44 1810 %tmp70 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_48", align 8 1811 %call7220 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %call6110, i8* %tmp70) 1812 %tmp16 = call i8* @objc_retain(i8* %call7220) nounwind 1813 call void @objc_release(i8* %call6110) nounwind 1814 br label %if.end74 1815 1816if.end74: ; preds = %if.then68, %if.then44 1817 %filename.0.in = phi i8* [ %call7220, %if.then68 ], [ %call6110, %if.then44 ] 1818 %filename.0 = bitcast i8* %filename.0.in to %1* 1819 %tmp17 = load i8** bitcast (%0* @"\01l_objc_msgSend_fixup_isEqual_" to i8**), align 16 1820 %tmp18 = bitcast i8* %tmp17 to i8 (i8*, %struct._message_ref_t*, i8*, ...)* 1821 %call78 = call signext i8 (i8*, %struct._message_ref_t*, i8*, ...)* %tmp18(i8* %call137, %struct._message_ref_t* bitcast (%0* @"\01l_objc_msgSend_fixup_isEqual_" to %struct._message_ref_t*), i8* %filename.0.in) 1822 %tobool79 = icmp eq i8 %call78, 0 1823 br i1 %tobool79, label %land.lhs.true80, label %if.then109 1824 1825land.lhs.true80: ; preds = %if.end74 1826 %tmp82 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_25", align 8 1827 %call84 = call signext i8 bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i8 (i8*, i8*)*)(i8* %filename.0.in, i8* %tmp82) 1828 %tobool86 = icmp eq i8 %call84, 0 1829 br i1 %tobool86, label %if.then109, label %if.end106 1830 1831if.end106: ; preds = %land.lhs.true80 1832 %tmp88 = load %struct._class_t** @"\01L_OBJC_CLASSLIST_REFERENCES_$_26", align 8 1833 %tmp90 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_28", align 8 1834 %tmp91 = bitcast %struct._class_t* %tmp88 to i8* 1835 %call9218 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp91, i8* %tmp90, i8* %filename.0.in) 1836 %tmp20 = bitcast i8* %call9218 to %5* 1837 %tmp21 = call i8* @objc_retain(i8* %call9218) nounwind 1838 %tmp22 = bitcast %5* %url.025 to i8* 1839 call void @objc_release(i8* %tmp22) nounwind 1840 %tmp94 = load %struct._class_t** @"\01L_OBJC_CLASSLIST_REFERENCES_$_29", align 8 1841 %tmp95 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_31", align 8 1842 %tmp96 = bitcast %struct._class_t* %tmp94 to i8* 1843 %call97 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp96, i8* %tmp95) 1844 %tmp99 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_33", align 8 1845 %call10119 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %call97, i8* %tmp99, i8* %call9218, i32 signext 1, %4** %err) 1846 %phitmp = icmp eq i8* %call10119, null 1847 br i1 %phitmp, label %if.then109, label %end 1848 1849if.then109: ; preds = %if.end106, %land.lhs.true80, %if.end74 1850 %url.129 = phi %5* [ %tmp20, %if.end106 ], [ %url.025, %if.end74 ], [ %url.025, %land.lhs.true80 ] 1851 %tmp110 = load %4** %err, align 8 1852 %tobool111 = icmp eq %4* %tmp110, null 1853 br i1 %tobool111, label %if.then112, label %if.end125 1854 1855if.then112: ; preds = %if.then109 1856 %tmp113 = load %struct._class_t** @"\01L_OBJC_CLASSLIST_REFERENCES_$_50", align 8 1857 %tmp114 = load %1** @NSCocoaErrorDomain, align 8 1858 %tmp115 = load %struct._class_t** @"\01L_OBJC_CLASSLIST_REFERENCES_$_51", align 8 1859 %call117 = call %1* @truncatedString(%1* %filename.0, i64 1034) 1860 %tmp118 = load %1** @NSFilePathErrorKey, align 8 1861 %tmp119 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_53", align 8 1862 %tmp120 = bitcast %struct._class_t* %tmp115 to i8* 1863 %call12113 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp120, i8* %tmp119, %1* %call117, %1* %tmp118, i8* null) 1864 %tmp122 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_55", align 8 1865 %tmp123 = bitcast %struct._class_t* %tmp113 to i8* 1866 %call12414 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp123, i8* %tmp122, %1* %tmp114, i64 258, i8* %call12113) 1867 %tmp23 = call i8* @objc_retain(i8* %call12414) nounwind 1868 %tmp25 = call i8* @objc_autorelease(i8* %tmp23) nounwind 1869 %tmp28 = bitcast i8* %tmp25 to %4* 1870 store %4* %tmp28, %4** %err, align 8 1871 br label %if.end125 1872 1873if.end125: ; preds = %if.then112, %if.then109 1874 %tmp127 = phi %4* [ %tmp110, %if.then109 ], [ %tmp28, %if.then112 ] 1875 %tmp126 = load %struct._class_t** @"\01L_OBJC_CLASSLIST_REFERENCES_$_56", align 8 1876 %tmp128 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_58", align 8 1877 %tmp129 = bitcast %struct._class_t* %tmp126 to i8* 1878 %call13015 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %tmp129, i8* %tmp128, %4* %tmp127) 1879 %tmp131 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_60", align 8 1880 %call13317 = call i8* (i8*, i8*, ...)* @objc_msgSend(i8* %call13015, i8* %tmp131) 1881 br label %end 1882 1883end: ; preds = %if.end125, %if.end106, %if.end, %land.lhs.true, %entry 1884 %filename.2 = phi %1* [ %filename.0, %if.end106 ], [ %filename.0, %if.end125 ], [ %tmp, %land.lhs.true ], [ null, %entry ], [ %tmp, %if.end ] 1885 %origFilename.0 = phi %1* [ %tmp, %if.end106 ], [ %tmp, %if.end125 ], [ %tmp, %land.lhs.true ], [ null, %entry ], [ %tmp, %if.end ] 1886 %url.2 = phi %5* [ %tmp20, %if.end106 ], [ %url.129, %if.end125 ], [ null, %land.lhs.true ], [ null, %entry ], [ %tmp13, %if.end ] 1887 call void @objc_release(i8* %tmp9) nounwind, !clang.imprecise_release !0 1888 %tmp29 = bitcast %5* %url.2 to i8* 1889 call void @objc_release(i8* %tmp29) nounwind, !clang.imprecise_release !0 1890 %tmp30 = bitcast %1* %origFilename.0 to i8* 1891 call void @objc_release(i8* %tmp30) nounwind, !clang.imprecise_release !0 1892 %tmp31 = bitcast %1* %filename.2 to i8* 1893 call void @objc_release(i8* %tmp31) nounwind, !clang.imprecise_release !0 1894 call void @objc_release(i8* %tmp7) nounwind, !clang.imprecise_release !0 1895 ret void 1896} 1897 1898!0 = metadata !{} 1899