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Code Releases Activity
e6ce5de4a4
go/test/fixedbugs/issue60982.go
Matthew Dempsky 79d4defa75 cmd/compile/internal/ssagen: fix min/max codegen, again 
The large-function phi placement algorithm evidently doesn't like the
same pseudo-variable being used to represent expressions of varying
types.

Instead, use the same tactic as used for "valVar" (ssa.go:6585--6587),
which is to just generate a fresh marker node each time.

Maybe we could just use the OMIN/OMAX nodes themselves as the key
(like we do for OANDAND/OOROR), but that just seems needlessly risky
for negligible memory savings. Using fresh marker values each time
seems obviously safe by comparison.

Fixes #61041.

Change-Id: Ie2600c9c37b599c2e26ae01f5f8a433025d7fd08
Reviewed-on: https://go-review.googlesource.com/c/go/+/506679
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2023-06-28 16:07:47 +00:00

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// compile
// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
func f(x int, b bool) int {
if x >= 1000 {
if b { // from #61041
var a struct{ f int64 }
_ = max(0, a.f)
}
return max(x, 2000)
}
// generate 1000 basic blocks to put this function
// well into the "large function" phi generation algorithm.
switch x {
case 0:
return 0
case 1:
return 1
case 2:
return 2
case 3:
return 3
case 4:
return 4
case 5:
return 5
case 6:
return 6
case 7:
return 7
case 8:
return 8
case 9:
return 9
case 10:
return 10
case 11:
return 11
case 12:
return 12
case 13:
return 13
case 14:
return 14
case 15:
return 15
case 16:
return 16
case 17:
return 17
case 18:
return 18
case 19:
return 19
case 20:
return 20
case 21:
return 21
case 22:
return 22
case 23:
return 23
case 24:
return 24
case 25:
return 25
case 26:
return 26
case 27:
return 27
case 28:
return 28
case 29:
return 29
case 30:
return 30
case 31:
return 31
case 32:
return 32
case 33:
return 33
case 34:
return 34
case 35:
return 35
case 36:
return 36
case 37:
return 37
case 38:
return 38
case 39:
return 39
case 40:
return 40
case 41:
return 41
case 42:
return 42
case 43:
return 43
case 44:
return 44
case 45:
return 45
case 46:
return 46
case 47:
return 47
case 48:
return 48
case 49:
return 49
case 50:
return 50
case 51:
return 51
case 52:
return 52
case 53:
return 53
case 54:
return 54
case 55:
return 55
case 56:
return 56
case 57:
return 57
case 58:
return 58
case 59:
return 59
case 60:
return 60
case 61:
return 61
case 62:
return 62
case 63:
return 63
case 64:
return 64
case 65:
return 65
case 66:
return 66
case 67:
return 67
case 68:
return 68
case 69:
return 69
case 70:
return 70
case 71:
return 71
case 72:
return 72
case 73:
return 73
case 74:
return 74
case 75:
return 75
case 76:
return 76
case 77:
return 77
case 78:
return 78
case 79:
return 79
case 80:
return 80
case 81:
return 81
case 82:
return 82
case 83:
return 83
case 84:
return 84
case 85:
return 85
case 86:
return 86
case 87:
return 87
case 88:
return 88
case 89:
return 89
case 90:
return 90
case 91:
return 91
case 92:
return 92
case 93:
return 93
case 94:
return 94
case 95:
return 95
case 96:
return 96
case 97:
return 97
case 98:
return 98
case 99:
return 99
case 100:
return 100
case 101:
return 101
case 102:
return 102
case 103:
return 103
case 104:
return 104
case 105:
return 105
case 106:
return 106
case 107:
return 107
case 108:
return 108
case 109:
return 109
case 110:
return 110
case 111:
return 111
case 112:
return 112
case 113:
return 113
case 114:
return 114
case 115:
return 115
case 116:
return 116
case 117:
return 117
case 118:
return 118
case 119:
return 119
case 120:
return 120
case 121:
return 121
case 122:
return 122
case 123:
return 123
case 124:
return 124
case 125:
return 125
case 126:
return 126
case 127:
return 127
case 128:
return 128
case 129:
return 129
case 130:
return 130
case 131:
return 131
case 132:
return 132
case 133:
return 133
case 134:
return 134
case 135:
return 135
case 136:
return 136
case 137:
return 137
case 138:
return 138
case 139:
return 139
case 140:
return 140
case 141:
return 141
case 142:
return 142
case 143:
return 143
case 144:
return 144
case 145:
return 145
case 146:
return 146
case 147:
return 147
case 148:
return 148
case 149:
return 149
case 150:
return 150
case 151:
return 151
case 152:
return 152
case 153:
return 153
case 154:
return 154
case 155:
return 155
case 156:
return 156
case 157:
return 157
case 158:
return 158
case 159:
return 159
case 160:
return 160
case 161:
return 161
case 162:
return 162
case 163:
return 163
case 164:
return 164
case 165:
return 165
case 166:
return 166
case 167:
return 167
case 168:
return 168
case 169:
return 169
case 170:
return 170
case 171:
return 171
case 172:
return 172
case 173:
return 173
case 174:
return 174
case 175:
return 175
case 176:
return 176
case 177:
return 177
case 178:
return 178
case 179:
return 179
case 180:
return 180
case 181:
return 181
case 182:
return 182
case 183:
return 183
case 184:
return 184
case 185:
return 185
case 186:
return 186
case 187:
return 187
case 188:
return 188
case 189:
return 189
case 190:
return 190
case 191:
return 191
case 192:
return 192
case 193:
return 193
case 194:
return 194
case 195:
return 195
case 196:
return 196
case 197:
return 197
case 198:
return 198
case 199:
return 199
case 200:
return 200
case 201:
return 201
case 202:
return 202
case 203:
return 203
case 204:
return 204
case 205:
return 205
case 206:
return 206
case 207:
return 207
case 208:
return 208
case 209:
return 209
case 210:
return 210
case 211:
return 211
case 212:
return 212
case 213:
return 213
case 214:
return 214
case 215:
return 215
case 216:
return 216
case 217:
return 217
case 218:
return 218
case 219:
return 219
case 220:
return 220
case 221:
return 221
case 222:
return 222
case 223:
return 223
case 224:
return 224
case 225:
return 225
case 226:
return 226
case 227:
return 227
case 228:
return 228
case 229:
return 229
case 230:
return 230
case 231:
return 231
case 232:
return 232
case 233:
return 233
case 234:
return 234
case 235:
return 235
case 236:
return 236
case 237:
return 237
case 238:
return 238
case 239:
return 239
case 240:
return 240
case 241:
return 241
case 242:
return 242
case 243:
return 243
case 244:
return 244
case 245:
return 245
case 246:
return 246
case 247:
return 247
case 248:
return 248
case 249:
return 249
case 250:
return 250
case 251:
return 251
case 252:
return 252
case 253:
return 253
case 254:
return 254
case 255:
return 255
case 256:
return 256
case 257:
return 257
case 258:
return 258
case 259:
return 259
case 260:
return 260
case 261:
return 261
case 262:
return 262
case 263:
return 263
case 264:
return 264
case 265:
return 265
case 266:
return 266
case 267:
return 267
case 268:
return 268
case 269:
return 269
case 270:
return 270
case 271:
return 271
case 272:
return 272
case 273:
return 273
case 274:
return 274
case 275:
return 275
case 276:
return 276
case 277:
return 277
case 278:
return 278
case 279:
return 279
case 280:
return 280
case 281:
return 281
case 282:
return 282
case 283:
return 283
case 284:
return 284
case 285:
return 285
case 286:
return 286
case 287:
return 287
case 288:
return 288
case 289:
return 289
case 290:
return 290
case 291:
return 291
case 292:
return 292
case 293:
return 293
case 294:
return 294
case 295:
return 295
case 296:
return 296
case 297:
return 297
case 298:
return 298
case 299:
return 299
case 300:
return 300
case 301:
return 301
case 302:
return 302
case 303:
return 303
case 304:
return 304
case 305:
return 305
case 306:
return 306
case 307:
return 307
case 308:
return 308
case 309:
return 309
case 310:
return 310
case 311:
return 311
case 312:
return 312
case 313:
return 313
case 314:
return 314
case 315:
return 315
case 316:
return 316
case 317:
return 317
case 318:
return 318
case 319:
return 319
case 320:
return 320
case 321:
return 321
case 322:
return 322
case 323:
return 323
case 324:
return 324
case 325:
return 325
case 326:
return 326
case 327:
return 327
case 328:
return 328
case 329:
return 329
case 330:
return 330
case 331:
return 331
case 332:
return 332
case 333:
return 333
case 334:
return 334
case 335:
return 335
case 336:
return 336
case 337:
return 337
case 338:
return 338
case 339:
return 339
case 340:
return 340
case 341:
return 341
case 342:
return 342
case 343:
return 343
case 344:
return 344
case 345:
return 345
case 346:
return 346
case 347:
return 347
case 348:
return 348
case 349:
return 349
case 350:
return 350
case 351:
return 351
case 352:
return 352
case 353:
return 353
case 354:
return 354
case 355:
return 355
case 356:
return 356
case 357:
return 357
case 358:
return 358
case 359:
return 359
case 360:
return 360
case 361:
return 361
case 362:
return 362
case 363:
return 363
case 364:
return 364
case 365:
return 365
case 366:
return 366
case 367:
return 367
case 368:
return 368
case 369:
return 369
case 370:
return 370
case 371:
return 371
case 372:
return 372
case 373:
return 373
case 374:
return 374
case 375:
return 375
case 376:
return 376
case 377:
return 377
case 378:
return 378
case 379:
return 379
case 380:
return 380
case 381:
return 381
case 382:
return 382
case 383:
return 383
case 384:
return 384
case 385:
return 385
case 386:
return 386
case 387:
return 387
case 388:
return 388
case 389:
return 389
case 390:
return 390
case 391:
return 391
case 392:
return 392
case 393:
return 393
case 394:
return 394
case 395:
return 395
case 396:
return 396
case 397:
return 397
case 398:
return 398
case 399:
return 399
case 400:
return 400
case 401:
return 401
case 402:
return 402
case 403:
return 403
case 404:
return 404
case 405:
return 405
case 406:
return 406
case 407:
return 407
case 408:
return 408
case 409:
return 409
case 410:
return 410
case 411:
return 411
case 412:
return 412
case 413:
return 413
case 414:
return 414
case 415:
return 415
case 416:
return 416
case 417:
return 417
case 418:
return 418
case 419:
return 419
case 420:
return 420
case 421:
return 421
case 422:
return 422
case 423:
return 423
case 424:
return 424
case 425:
return 425
case 426:
return 426
case 427:
return 427
case 428:
return 428
case 429:
return 429
case 430:
return 430
case 431:
return 431
case 432:
return 432
case 433:
return 433
case 434:
return 434
case 435:
return 435
case 436:
return 436
case 437:
return 437
case 438:
return 438
case 439:
return 439
case 440:
return 440
case 441:
return 441
case 442:
return 442
case 443:
return 443
case 444:
return 444
case 445:
return 445
case 446:
return 446
case 447:
return 447
case 448:
return 448
case 449:
return 449
case 450:
return 450
case 451:
return 451
case 452:
return 452
case 453:
return 453
case 454:
return 454
case 455:
return 455
case 456:
return 456
case 457:
return 457
case 458:
return 458
case 459:
return 459
case 460:
return 460
case 461:
return 461
case 462:
return 462
case 463:
return 463
case 464:
return 464
case 465:
return 465
case 466:
return 466
case 467:
return 467
case 468:
return 468
case 469:
return 469
case 470:
return 470
case 471:
return 471
case 472:
return 472
case 473:
return 473
case 474:
return 474
case 475:
return 475
case 476:
return 476
case 477:
return 477
case 478:
return 478
case 479:
return 479
case 480:
return 480
case 481:
return 481
case 482:
return 482
case 483:
return 483
case 484:
return 484
case 485:
return 485
case 486:
return 486
case 487:
return 487
case 488:
return 488
case 489:
return 489
case 490:
return 490
case 491:
return 491
case 492:
return 492
case 493:
return 493
case 494:
return 494
case 495:
return 495
case 496:
return 496
case 497:
return 497
case 498:
return 498
case 499:
return 499
case 500:
return 500
case 501:
return 501
case 502:
return 502
case 503:
return 503
case 504:
return 504
case 505:
return 505
case 506:
return 506
case 507:
return 507
case 508:
return 508
case 509:
return 509
case 510:
return 510
case 511:
return 511
case 512:
return 512
case 513:
return 513
case 514:
return 514
case 515:
return 515
case 516:
return 516
case 517:
return 517
case 518:
return 518
case 519:
return 519
case 520:
return 520
case 521:
return 521
case 522:
return 522
case 523:
return 523
case 524:
return 524
case 525:
return 525
case 526:
return 526
case 527:
return 527
case 528:
return 528
case 529:
return 529
case 530:
return 530
case 531:
return 531
case 532:
return 532
case 533:
return 533
case 534:
return 534
case 535:
return 535
case 536:
return 536
case 537:
return 537
case 538:
return 538
case 539:
return 539
case 540:
return 540
case 541:
return 541
case 542:
return 542
case 543:
return 543
case 544:
return 544
case 545:
return 545
case 546:
return 546
case 547:
return 547
case 548:
return 548
case 549:
return 549
case 550:
return 550
case 551:
return 551
case 552:
return 552
case 553:
return 553
case 554:
return 554
case 555:
return 555
case 556:
return 556
case 557:
return 557
case 558:
return 558
case 559:
return 559
case 560:
return 560
case 561:
return 561
case 562:
return 562
case 563:
return 563
case 564:
return 564
case 565:
return 565
case 566:
return 566
case 567:
return 567
case 568:
return 568
case 569:
return 569
case 570:
return 570
case 571:
return 571
case 572:
return 572
case 573:
return 573
case 574:
return 574
case 575:
return 575
case 576:
return 576
case 577:
return 577
case 578:
return 578
case 579:
return 579
case 580:
return 580
case 581:
return 581
case 582:
return 582
case 583:
return 583
case 584:
return 584
case 585:
return 585
case 586:
return 586
case 587:
return 587
case 588:
return 588
case 589:
return 589
case 590:
return 590
case 591:
return 591
case 592:
return 592
case 593:
return 593
case 594:
return 594
case 595:
return 595
case 596:
return 596
case 597:
return 597
case 598:
return 598
case 599:
return 599
case 600:
return 600
case 601:
return 601
case 602:
return 602
case 603:
return 603
case 604:
return 604
case 605:
return 605
case 606:
return 606
case 607:
return 607
case 608:
return 608
case 609:
return 609
case 610:
return 610
case 611:
return 611
case 612:
return 612
case 613:
return 613
case 614:
return 614
case 615:
return 615
case 616:
return 616
case 617:
return 617
case 618:
return 618
case 619:
return 619
case 620:
return 620
case 621:
return 621
case 622:
return 622
case 623:
return 623
case 624:
return 624
case 625:
return 625
case 626:
return 626
case 627:
return 627
case 628:
return 628
case 629:
return 629
case 630:
return 630
case 631:
return 631
case 632:
return 632
case 633:
return 633
case 634:
return 634
case 635:
return 635
case 636:
return 636
case 637:
return 637
case 638:
return 638
case 639:
return 639
case 640:
return 640
case 641:
return 641
case 642:
return 642
case 643:
return 643
case 644:
return 644
case 645:
return 645
case 646:
return 646
case 647:
return 647
case 648:
return 648
case 649:
return 649
case 650:
return 650
case 651:
return 651
case 652:
return 652
case 653:
return 653
case 654:
return 654
case 655:
return 655
case 656:
return 656
case 657:
return 657
case 658:
return 658
case 659:
return 659
case 660:
return 660
case 661:
return 661
case 662:
return 662
case 663:
return 663
case 664:
return 664
case 665:
return 665
case 666:
return 666
case 667:
return 667
case 668:
return 668
case 669:
return 669
case 670:
return 670
case 671:
return 671
case 672:
return 672
case 673:
return 673
case 674:
return 674
case 675:
return 675
case 676:
return 676
case 677:
return 677
case 678:
return 678
case 679:
return 679
case 680:
return 680
case 681:
return 681
case 682:
return 682
case 683:
return 683
case 684:
return 684
case 685:
return 685
case 686:
return 686
case 687:
return 687
case 688:
return 688
case 689:
return 689
case 690:
return 690
case 691:
return 691
case 692:
return 692
case 693:
return 693
case 694:
return 694
case 695:
return 695
case 696:
return 696
case 697:
return 697
case 698:
return 698
case 699:
return 699
case 700:
return 700
case 701:
return 701
case 702:
return 702
case 703:
return 703
case 704:
return 704
case 705:
return 705
case 706:
return 706
case 707:
return 707
case 708:
return 708
case 709:
return 709
case 710:
return 710
case 711:
return 711
case 712:
return 712
case 713:
return 713
case 714:
return 714
case 715:
return 715
case 716:
return 716
case 717:
return 717
case 718:
return 718
case 719:
return 719
case 720:
return 720
case 721:
return 721
case 722:
return 722
case 723:
return 723
case 724:
return 724
case 725:
return 725
case 726:
return 726
case 727:
return 727
case 728:
return 728
case 729:
return 729
case 730:
return 730
case 731:
return 731
case 732:
return 732
case 733:
return 733
case 734:
return 734
case 735:
return 735
case 736:
return 736
case 737:
return 737
case 738:
return 738
case 739:
return 739
case 740:
return 740
case 741:
return 741
case 742:
return 742
case 743:
return 743
case 744:
return 744
case 745:
return 745
case 746:
return 746
case 747:
return 747
case 748:
return 748
case 749:
return 749
case 750:
return 750
case 751:
return 751
case 752:
return 752
case 753:
return 753
case 754:
return 754
case 755:
return 755
case 756:
return 756
case 757:
return 757
case 758:
return 758
case 759:
return 759
case 760:
return 760
case 761:
return 761
case 762:
return 762
case 763:
return 763
case 764:
return 764
case 765:
return 765
case 766:
return 766
case 767:
return 767
case 768:
return 768
case 769:
return 769
case 770:
return 770
case 771:
return 771
case 772:
return 772
case 773:
return 773
case 774:
return 774
case 775:
return 775
case 776:
return 776
case 777:
return 777
case 778:
return 778
case 779:
return 779
case 780:
return 780
case 781:
return 781
case 782:
return 782
case 783:
return 783
case 784:
return 784
case 785:
return 785
case 786:
return 786
case 787:
return 787
case 788:
return 788
case 789:
return 789
case 790:
return 790
case 791:
return 791
case 792:
return 792
case 793:
return 793
case 794:
return 794
case 795:
return 795
case 796:
return 796
case 797:
return 797
case 798:
return 798
case 799:
return 799
case 800:
return 800
case 801:
return 801
case 802:
return 802
case 803:
return 803
case 804:
return 804
case 805:
return 805
case 806:
return 806
case 807:
return 807
case 808:
return 808
case 809:
return 809
case 810:
return 810
case 811:
return 811
case 812:
return 812
case 813:
return 813
case 814:
return 814
case 815:
return 815
case 816:
return 816
case 817:
return 817
case 818:
return 818
case 819:
return 819
case 820:
return 820
case 821:
return 821
case 822:
return 822
case 823:
return 823
case 824:
return 824
case 825:
return 825
case 826:
return 826
case 827:
return 827
case 828:
return 828
case 829:
return 829
case 830:
return 830
case 831:
return 831
case 832:
return 832
case 833:
return 833
case 834:
return 834
case 835:
return 835
case 836:
return 836
case 837:
return 837
case 838:
return 838
case 839:
return 839
case 840:
return 840
case 841:
return 841
case 842:
return 842
case 843:
return 843
case 844:
return 844
case 845:
return 845
case 846:
return 846
case 847:
return 847
case 848:
return 848
case 849:
return 849
case 850:
return 850
case 851:
return 851
case 852:
return 852
case 853:
return 853
case 854:
return 854
case 855:
return 855
case 856:
return 856
case 857:
return 857
case 858:
return 858
case 859:
return 859
case 860:
return 860
case 861:
return 861
case 862:
return 862
case 863:
return 863
case 864:
return 864
case 865:
return 865
case 866:
return 866
case 867:
return 867
case 868:
return 868
case 869:
return 869
case 870:
return 870
case 871:
return 871
case 872:
return 872
case 873:
return 873
case 874:
return 874
case 875:
return 875
case 876:
return 876
case 877:
return 877
case 878:
return 878
case 879:
return 879
case 880:
return 880
case 881:
return 881
case 882:
return 882
case 883:
return 883
case 884:
return 884
case 885:
return 885
case 886:
return 886
case 887:
return 887
case 888:
return 888
case 889:
return 889
case 890:
return 890
case 891:
return 891
case 892:
return 892
case 893:
return 893
case 894:
return 894
case 895:
return 895
case 896:
return 896
case 897:
return 897
case 898:
return 898
case 899:
return 899
case 900:
return 900
case 901:
return 901
case 902:
return 902
case 903:
return 903
case 904:
return 904
case 905:
return 905
case 906:
return 906
case 907:
return 907
case 908:
return 908
case 909:
return 909
case 910:
return 910
case 911:
return 911
case 912:
return 912
case 913:
return 913
case 914:
return 914
case 915:
return 915
case 916:
return 916
case 917:
return 917
case 918:
return 918
case 919:
return 919
case 920:
return 920
case 921:
return 921
case 922:
return 922
case 923:
return 923
case 924:
return 924
case 925:
return 925
case 926:
return 926
case 927:
return 927
case 928:
return 928
case 929:
return 929
case 930:
return 930
case 931:
return 931
case 932:
return 932
case 933:
return 933
case 934:
return 934
case 935:
return 935
case 936:
return 936
case 937:
return 937
case 938:
return 938
case 939:
return 939
case 940:
return 940
case 941:
return 941
case 942:
return 942
case 943:
return 943
case 944:
return 944
case 945:
return 945
case 946:
return 946
case 947:
return 947
case 948:
return 948
case 949:
return 949
case 950:
return 950
case 951:
return 951
case 952:
return 952
case 953:
return 953
case 954:
return 954
case 955:
return 955
case 956:
return 956
case 957:
return 957
case 958:
return 958
case 959:
return 959
case 960:
return 960
case 961:
return 961
case 962:
return 962
case 963:
return 963
case 964:
return 964
case 965:
return 965
case 966:
return 966
case 967:
return 967
case 968:
return 968
case 969:
return 969
case 970:
return 970
case 971:
return 971
case 972:
return 972
case 973:
return 973
case 974:
return 974
case 975:
return 975
case 976:
return 976
case 977:
return 977
case 978:
return 978
case 979:
return 979
case 980:
return 980
case 981:
return 981
case 982:
return 982
case 983:
return 983
case 984:
return 984
case 985:
return 985
case 986:
return 986
case 987:
return 987
case 988:
return 988
case 989:
return 989
case 990:
return 990
case 991:
return 991
case 992:
return 992
case 993:
return 993
case 994:
return 994
case 995:
return 995
case 996:
return 996
case 997:
return 997
case 998:
return 998
case 999:
return 999
}
return 0
}
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