1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals
; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=7 -S < %s | FileCheck %s --check-prefixes=CHECK,TUNIT
; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,CGSCC
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; Test cases specifically designed for the "undefined behavior" abstract function attribute.
; We want to verify that whenever undefined behavior is assumed, the code becomes unreachable.
; We use FIXME's to indicate problems and missing attributes.
; -- Load tests --
define void @load_wholly_unreachable() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@load_wholly_unreachable
; CHECK-SAME: () #[[ATTR0:[0-9]+]] {
; CHECK-NEXT: unreachable
;
%a = load i32, ptr null
ret void
}
define void @loads_wholly_unreachable() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@loads_wholly_unreachable
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: unreachable
;
%a = load i32, ptr null
%b = load i32, ptr null
ret void
}
define void @load_single_bb_unreachable(i1 %cond) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@load_single_bb_unreachable
; CHECK-SAME: (i1 noundef [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CHECK: t:
; CHECK-NEXT: unreachable
; CHECK: e:
; CHECK-NEXT: ret void
;
br i1 %cond, label %t, label %e
t:
%b = load i32, ptr null
br label %e
e:
ret void
}
; Note that while the load is removed (because it's unused), the block
; is not changed to unreachable
define void @load_null_pointer_is_defined() null_pointer_is_valid {
; CHECK: Function Attrs: nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@load_null_pointer_is_defined
; CHECK-SAME: () #[[ATTR1:[0-9]+]] {
; CHECK-NEXT: ret void
;
%a = load i32, ptr null
ret void
}
define internal ptr @ret_null() {
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@ret_null
; CGSCC-SAME: () #[[ATTR0]] {
; CGSCC-NEXT: ret ptr null
;
ret ptr null
}
define void @load_null_propagated() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@load_null_propagated
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@load_null_propagated
; CGSCC-SAME: () #[[ATTR2:[0-9]+]] {
; CGSCC-NEXT: ret void
;
%ptr = call ptr @ret_null()
%a = load i32, ptr %ptr
ret void
}
; -- Store tests --
define void @store_wholly_unreachable() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@store_wholly_unreachable
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: unreachable
;
store i32 5, ptr null
ret void
}
define void @store_wholly_unreachable_volatile() {
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@store_wholly_unreachable_volatile
; TUNIT-SAME: () #[[ATTR2:[0-9]+]] {
; TUNIT-NEXT: store volatile i32 5, ptr null, align 4294967296
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@store_wholly_unreachable_volatile
; CGSCC-SAME: () #[[ATTR3:[0-9]+]] {
; CGSCC-NEXT: store volatile i32 5, ptr null, align 4294967296
; CGSCC-NEXT: ret void
;
store volatile i32 5, ptr null
ret void
}
define void @store_single_bb_unreachable(i1 %cond) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@store_single_bb_unreachable
; CHECK-SAME: (i1 noundef [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CHECK: t:
; CHECK-NEXT: unreachable
; CHECK: e:
; CHECK-NEXT: ret void
;
br i1 %cond, label %t, label %e
t:
store i32 5, ptr null
br label %e
e:
ret void
}
define void @store_null_pointer_is_defined() null_pointer_is_valid {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(write)
; TUNIT-LABEL: define {{[^@]+}}@store_null_pointer_is_defined
; TUNIT-SAME: () #[[ATTR3:[0-9]+]] {
; TUNIT-NEXT: store i32 5, ptr null, align 4294967296
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(write)
; CGSCC-LABEL: define {{[^@]+}}@store_null_pointer_is_defined
; CGSCC-SAME: () #[[ATTR4:[0-9]+]] {
; CGSCC-NEXT: store i32 5, ptr null, align 4294967296
; CGSCC-NEXT: ret void
;
store i32 5, ptr null
ret void
}
define void @store_null_propagated() {
; ATTRIBUTOR-LABEL: @store_null_propagated(
; ATTRIBUTOR-NEXT: unreachable
;
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@store_null_propagated
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(write)
; CGSCC-LABEL: define {{[^@]+}}@store_null_propagated
; CGSCC-SAME: () #[[ATTR5:[0-9]+]] {
; CGSCC-NEXT: [[PTR:%.*]] = call noalias align 4294967296 ptr @ret_null() #[[ATTR10:[0-9]+]]
; CGSCC-NEXT: ret void
;
%ptr = call ptr @ret_null()
store i32 5, ptr %ptr
ret void
}
; -- AtomicRMW tests --
define void @atomicrmw_wholly_unreachable() {
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomicrmw_wholly_unreachable
; TUNIT-SAME: () #[[ATTR2]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@atomicrmw_wholly_unreachable
; CGSCC-SAME: () #[[ATTR3]] {
; CGSCC-NEXT: unreachable
;
%a = atomicrmw add ptr null, i32 1 acquire
ret void
}
define void @atomicrmw_single_bb_unreachable(i1 %cond) {
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomicrmw_single_bb_unreachable
; TUNIT-SAME: (i1 noundef [[COND:%.*]]) #[[ATTR2]] {
; TUNIT-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@atomicrmw_single_bb_unreachable
; CGSCC-SAME: (i1 noundef [[COND:%.*]]) #[[ATTR3]] {
; CGSCC-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CGSCC: t:
; CGSCC-NEXT: unreachable
; CGSCC: e:
; CGSCC-NEXT: ret void
;
br i1 %cond, label %t, label %e
t:
%a = atomicrmw add ptr null, i32 1 acquire
br label %e
e:
ret void
}
define void @atomicrmw_null_pointer_is_defined() null_pointer_is_valid {
; TUNIT: Function Attrs: nofree norecurse nounwind null_pointer_is_valid willreturn
; TUNIT-LABEL: define {{[^@]+}}@atomicrmw_null_pointer_is_defined
; TUNIT-SAME: () #[[ATTR4:[0-9]+]] {
; TUNIT-NEXT: [[A:%.*]] = atomicrmw add ptr null, i32 1 acquire, align 4
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nounwind null_pointer_is_valid willreturn
; CGSCC-LABEL: define {{[^@]+}}@atomicrmw_null_pointer_is_defined
; CGSCC-SAME: () #[[ATTR6:[0-9]+]] {
; CGSCC-NEXT: [[A:%.*]] = atomicrmw add ptr null, i32 1 acquire, align 4
; CGSCC-NEXT: ret void
;
%a = atomicrmw add ptr null, i32 1 acquire
ret void
}
define void @atomicrmw_null_propagated() {
; ATTRIBUTOR-LABEL: @atomicrmw_null_propagated(
; ATTRIBUTOR-NEXT: unreachable
;
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomicrmw_null_propagated
; TUNIT-SAME: () #[[ATTR2]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nounwind willreturn
; CGSCC-LABEL: define {{[^@]+}}@atomicrmw_null_propagated
; CGSCC-SAME: () #[[ATTR7:[0-9]+]] {
; CGSCC-NEXT: [[PTR:%.*]] = call noalias ptr @ret_null() #[[ATTR10]]
; CGSCC-NEXT: [[A:%.*]] = atomicrmw add ptr [[PTR]], i32 1 acquire, align 4
; CGSCC-NEXT: ret void
;
%ptr = call ptr @ret_null()
%a = atomicrmw add ptr %ptr, i32 1 acquire
ret void
}
; -- AtomicCmpXchg tests --
define void @atomiccmpxchg_wholly_unreachable() {
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomiccmpxchg_wholly_unreachable
; TUNIT-SAME: () #[[ATTR2]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@atomiccmpxchg_wholly_unreachable
; CGSCC-SAME: () #[[ATTR3]] {
; CGSCC-NEXT: unreachable
;
%a = cmpxchg ptr null, i32 2, i32 3 acq_rel monotonic
ret void
}
define void @atomiccmpxchg_single_bb_unreachable(i1 %cond) {
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomiccmpxchg_single_bb_unreachable
; TUNIT-SAME: (i1 noundef [[COND:%.*]]) #[[ATTR2]] {
; TUNIT-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@atomiccmpxchg_single_bb_unreachable
; CGSCC-SAME: (i1 noundef [[COND:%.*]]) #[[ATTR3]] {
; CGSCC-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CGSCC: t:
; CGSCC-NEXT: unreachable
; CGSCC: e:
; CGSCC-NEXT: ret void
;
br i1 %cond, label %t, label %e
t:
%a = cmpxchg ptr null, i32 2, i32 3 acq_rel monotonic
br label %e
e:
ret void
}
define void @atomiccmpxchg_null_pointer_is_defined() null_pointer_is_valid {
; TUNIT: Function Attrs: nofree norecurse nounwind null_pointer_is_valid willreturn
; TUNIT-LABEL: define {{[^@]+}}@atomiccmpxchg_null_pointer_is_defined
; TUNIT-SAME: () #[[ATTR4]] {
; TUNIT-NEXT: [[A:%.*]] = cmpxchg ptr null, i32 2, i32 3 acq_rel monotonic, align 4
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nounwind null_pointer_is_valid willreturn
; CGSCC-LABEL: define {{[^@]+}}@atomiccmpxchg_null_pointer_is_defined
; CGSCC-SAME: () #[[ATTR6]] {
; CGSCC-NEXT: [[A:%.*]] = cmpxchg ptr null, i32 2, i32 3 acq_rel monotonic, align 4
; CGSCC-NEXT: ret void
;
%a = cmpxchg ptr null, i32 2, i32 3 acq_rel monotonic
ret void
}
define void @atomiccmpxchg_null_propagated() {
; ATTRIBUTOR-LABEL: @atomiccmpxchg_null_propagated(
; ATTRIBUTOR-NEXT: unreachable
;
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomiccmpxchg_null_propagated
; TUNIT-SAME: () #[[ATTR2]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nounwind willreturn
; CGSCC-LABEL: define {{[^@]+}}@atomiccmpxchg_null_propagated
; CGSCC-SAME: () #[[ATTR7]] {
; CGSCC-NEXT: [[PTR:%.*]] = call noalias ptr @ret_null() #[[ATTR10]]
; CGSCC-NEXT: [[A:%.*]] = cmpxchg ptr [[PTR]], i32 2, i32 3 acq_rel monotonic, align 4
; CGSCC-NEXT: ret void
;
%ptr = call ptr @ret_null()
%a = cmpxchg ptr %ptr, i32 2, i32 3 acq_rel monotonic
ret void
}
; -- Conditional branching tests --
; Note: The unreachable on %t and %e is _not_ from AAUndefinedBehavior
define i32 @cond_br_on_undef() {
; TUNIT: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@cond_br_on_undef
; TUNIT-SAME: () #[[ATTR5:[0-9]+]] {
; TUNIT-NEXT: unreachable
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@cond_br_on_undef
; CGSCC-SAME: () #[[ATTR8:[0-9]+]] {
; CGSCC-NEXT: unreachable
; CGSCC: t:
; CGSCC-NEXT: unreachable
; CGSCC: e:
; CGSCC-NEXT: unreachable
;
br i1 undef, label %t, label %e
t:
ret i32 1
e:
ret i32 2
}
; More complicated branching
; Valid branch - verify that this is not converted
; to unreachable.
define void @cond_br_on_undef2(i1 %cond) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@cond_br_on_undef2
; CHECK-SAME: (i1 noundef [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: br i1 [[COND]], label [[T1:%.*]], label [[E1:%.*]]
; CHECK: t1:
; CHECK-NEXT: unreachable
; CHECK: t2:
; CHECK-NEXT: unreachable
; CHECK: e2:
; CHECK-NEXT: unreachable
; CHECK: e1:
; CHECK-NEXT: ret void
;
br i1 %cond, label %t1, label %e1
t1:
br i1 undef, label %t2, label %e2
t2:
ret void
e2:
ret void
e1:
ret void
}
define i1 @ret_undef() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@ret_undef
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: ret i1 undef
;
ret i1 undef
}
define void @cond_br_on_undef_interproc() {
; TUNIT: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@cond_br_on_undef_interproc
; TUNIT-SAME: () #[[ATTR5]] {
; TUNIT-NEXT: unreachable
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@cond_br_on_undef_interproc
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: [[COND:%.*]] = call i1 @ret_undef() #[[ATTR10]]
; CGSCC-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CGSCC: t:
; CGSCC-NEXT: ret void
; CGSCC: e:
; CGSCC-NEXT: ret void
;
%cond = call i1 @ret_undef()
br i1 %cond, label %t, label %e
t:
ret void
e:
ret void
}
define i1 @ret_undef2() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@ret_undef2
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: br i1 true, label [[T:%.*]], label [[E:%.*]]
; CHECK: t:
; CHECK-NEXT: ret i1 undef
; CHECK: e:
; CHECK-NEXT: unreachable
;
br i1 true, label %t, label %e
t:
ret i1 undef
e:
ret i1 undef
}
; More complicated interproc deduction of undef
define void @cond_br_on_undef_interproc2() {
; TUNIT: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@cond_br_on_undef_interproc2
; TUNIT-SAME: () #[[ATTR5]] {
; TUNIT-NEXT: unreachable
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@cond_br_on_undef_interproc2
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: [[COND:%.*]] = call i1 @ret_undef2() #[[ATTR10]]
; CGSCC-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CGSCC: t:
; CGSCC-NEXT: ret void
; CGSCC: e:
; CGSCC-NEXT: ret void
;
%cond = call i1 @ret_undef2()
br i1 %cond, label %t, label %e
t:
ret void
e:
ret void
}
; Branch on undef that depends on propagation of
; undef of a previous instruction.
define i32 @cond_br_on_undef3() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@cond_br_on_undef3
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 1, undef
; CHECK-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CHECK: t:
; CHECK-NEXT: ret i32 1
; CHECK: e:
; CHECK-NEXT: ret i32 2
;
%cond = icmp ne i32 1, undef
br i1 %cond, label %t, label %e
t:
ret i32 1
e:
ret i32 2
}
; Branch on undef because of uninitialized value.
; FIXME: Currently it doesn't propagate the undef.
define i32 @cond_br_on_undef_uninit() {
; TUNIT: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@cond_br_on_undef_uninit
; TUNIT-SAME: () #[[ATTR5]] {
; TUNIT-NEXT: unreachable
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@cond_br_on_undef_uninit
; CGSCC-SAME: () #[[ATTR8]] {
; CGSCC-NEXT: unreachable
; CGSCC: t:
; CGSCC-NEXT: unreachable
; CGSCC: e:
; CGSCC-NEXT: unreachable
;
%alloc = alloca i1
%cond = load i1, ptr %alloc
br i1 %cond, label %t, label %e
t:
ret i32 1
e:
ret i32 2
}
; Note that the `load` has UB (so it will be changed to unreachable)
; and the branch is a terminator that can be constant-folded.
; We want to test that doing both won't cause a segfault.
; MODULE-NOT: @callee(
define internal i32 @callee(i1 %C, ptr %A) {
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@callee
; CGSCC-SAME: () #[[ATTR0]] {
; CGSCC-NEXT: entry:
; CGSCC-NEXT: unreachable
; CGSCC: T:
; CGSCC-NEXT: unreachable
; CGSCC: F:
; CGSCC-NEXT: ret i32 1
;
entry:
%A.0 = load i32, ptr null
br i1 %C, label %T, label %F
T:
ret i32 %A.0
F:
ret i32 1
}
define i32 @foo() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@foo
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: ret i32 1
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@foo
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: [[X:%.*]] = call noundef i32 @callee() #[[ATTR10]]
; CGSCC-NEXT: ret i32 [[X]]
;
%X = call i32 @callee(i1 false, ptr null)
ret i32 %X
}
; Tests for nonnull noundef attribute violation.
;
; Tests for argument position
define void @arg_nonnull_1(ptr nonnull %a) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_1
; TUNIT-SAME: (ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[A:%.*]]) #[[ATTR6:[0-9]+]] {
; TUNIT-NEXT: store i32 0, ptr [[A]], align 4
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_1
; CGSCC-SAME: (ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[A:%.*]]) #[[ATTR9:[0-9]+]] {
; CGSCC-NEXT: store i32 0, ptr [[A]], align 4
; CGSCC-NEXT: ret void
;
store i32 0, ptr %a
ret void
}
define void @arg_nonnull_1_noundef_1(ptr nonnull noundef %a) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_1_noundef_1
; TUNIT-SAME: (ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[A:%.*]]) #[[ATTR6]] {
; TUNIT-NEXT: store i32 0, ptr [[A]], align 4
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_1_noundef_1
; CGSCC-SAME: (ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[A:%.*]]) #[[ATTR9]] {
; CGSCC-NEXT: store i32 0, ptr [[A]], align 4
; CGSCC-NEXT: ret void
;
store i32 0, ptr %a
ret void
}
define void @arg_nonnull_12(ptr nonnull %a, ptr nonnull %b, ptr %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_12
; TUNIT-SAME: (ptr nocapture nofree nonnull writeonly [[A:%.*]], ptr nocapture nofree nonnull writeonly [[B:%.*]], ptr nofree writeonly [[C:%.*]]) #[[ATTR6]] {
; TUNIT-NEXT: [[D:%.*]] = icmp eq ptr [[C]], null
; TUNIT-NEXT: br i1 [[D]], label [[T:%.*]], label [[F:%.*]]
; TUNIT: t:
; TUNIT-NEXT: store i32 0, ptr [[A]], align 4
; TUNIT-NEXT: br label [[RET:%.*]]
; TUNIT: f:
; TUNIT-NEXT: store i32 1, ptr [[B]], align 4
; TUNIT-NEXT: br label [[RET]]
; TUNIT: ret:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_12
; CGSCC-SAME: (ptr nocapture nofree nonnull writeonly [[A:%.*]], ptr nocapture nofree nonnull writeonly [[B:%.*]], ptr nofree writeonly [[C:%.*]]) #[[ATTR9]] {
; CGSCC-NEXT: [[D:%.*]] = icmp eq ptr [[C]], null
; CGSCC-NEXT: br i1 [[D]], label [[T:%.*]], label [[F:%.*]]
; CGSCC: t:
; CGSCC-NEXT: store i32 0, ptr [[A]], align 4
; CGSCC-NEXT: br label [[RET:%.*]]
; CGSCC: f:
; CGSCC-NEXT: store i32 1, ptr [[B]], align 4
; CGSCC-NEXT: br label [[RET]]
; CGSCC: ret:
; CGSCC-NEXT: ret void
;
%d = icmp eq ptr %c, null
br i1 %d, label %t, label %f
t:
store i32 0, ptr %a
br label %ret
f:
store i32 1, ptr %b
br label %ret
ret:
ret void
}
define void @arg_nonnull_12_noundef_2(ptr nonnull %a, ptr noundef nonnull %b, ptr %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_12_noundef_2
; TUNIT-SAME: (ptr nocapture nofree nonnull writeonly [[A:%.*]], ptr nocapture nofree noundef nonnull writeonly [[B:%.*]], ptr nofree writeonly [[C:%.*]]) #[[ATTR6]] {
; TUNIT-NEXT: [[D:%.*]] = icmp eq ptr [[C]], null
; TUNIT-NEXT: br i1 [[D]], label [[T:%.*]], label [[F:%.*]]
; TUNIT: t:
; TUNIT-NEXT: store i32 0, ptr [[A]], align 4
; TUNIT-NEXT: br label [[RET:%.*]]
; TUNIT: f:
; TUNIT-NEXT: store i32 1, ptr [[B]], align 4
; TUNIT-NEXT: br label [[RET]]
; TUNIT: ret:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_12_noundef_2
; CGSCC-SAME: (ptr nocapture nofree nonnull writeonly [[A:%.*]], ptr nocapture nofree noundef nonnull writeonly [[B:%.*]], ptr nofree writeonly [[C:%.*]]) #[[ATTR9]] {
; CGSCC-NEXT: [[D:%.*]] = icmp eq ptr [[C]], null
; CGSCC-NEXT: br i1 [[D]], label [[T:%.*]], label [[F:%.*]]
; CGSCC: t:
; CGSCC-NEXT: store i32 0, ptr [[A]], align 4
; CGSCC-NEXT: br label [[RET:%.*]]
; CGSCC: f:
; CGSCC-NEXT: store i32 1, ptr [[B]], align 4
; CGSCC-NEXT: br label [[RET]]
; CGSCC: ret:
; CGSCC-NEXT: ret void
;
%d = icmp eq ptr %c, null
br i1 %d, label %t, label %f
t:
store i32 0, ptr %a
br label %ret
f:
store i32 1, ptr %b
br label %ret
ret:
ret void
}
; Pass null directly to argument with nonnull attribute
define void @arg_nonnull_violation1_1() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation1_1
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation1_1
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: unreachable
;
call void @arg_nonnull_1(ptr null)
ret void
}
define void @arg_nonnull_violation1_2() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation1_2
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation1_2
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: unreachable
;
call void @arg_nonnull_1_noundef_1(ptr null)
ret void
}
; A case that depends on value simplification
define void @arg_nonnull_violation2_1(i1 %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation2_1
; TUNIT-SAME: (i1 [[C:%.*]]) #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation2_1
; CGSCC-SAME: (i1 [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: unreachable
;
%mustnull = select i1 %c, ptr null, ptr null
call void @arg_nonnull_1(ptr %mustnull)
ret void
}
define void @arg_nonnull_violation2_2(i1 %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation2_2
; TUNIT-SAME: (i1 [[C:%.*]]) #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation2_2
; CGSCC-SAME: (i1 [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: unreachable
;
%mustnull = select i1 %c, ptr null, ptr null
call void @arg_nonnull_1_noundef_1(ptr %mustnull)
ret void
}
; Cases for single and multiple violation at a callsite
define void @arg_nonnull_violation3_1(i1 %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation3_1
; TUNIT-SAME: (i1 noundef [[C:%.*]]) #[[ATTR0]] {
; TUNIT-NEXT: [[PTR:%.*]] = alloca i32, align 4
; TUNIT-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; TUNIT: t:
; TUNIT-NEXT: call void @arg_nonnull_12(ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) #[[ATTR7:[0-9]+]]
; TUNIT-NEXT: call void @arg_nonnull_12(ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr noalias nocapture nofree noundef writeonly align 4294967296 null) #[[ATTR7]]
; TUNIT-NEXT: unreachable
; TUNIT: f:
; TUNIT-NEXT: unreachable
; TUNIT: ret:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation3_1
; CGSCC-SAME: (i1 noundef [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CGSCC-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; CGSCC: t:
; CGSCC-NEXT: call void @arg_nonnull_12(ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) #[[ATTR11:[0-9]+]]
; CGSCC-NEXT: call void @arg_nonnull_12(ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr noalias nocapture nofree noundef writeonly align 4294967296 null) #[[ATTR11]]
; CGSCC-NEXT: unreachable
; CGSCC: f:
; CGSCC-NEXT: unreachable
; CGSCC: ret:
; CGSCC-NEXT: ret void
;
%ptr = alloca i32
br i1 %c, label %t, label %f
t:
call void @arg_nonnull_12(ptr %ptr, ptr %ptr, ptr %ptr)
call void @arg_nonnull_12(ptr %ptr, ptr %ptr, ptr null)
call void @arg_nonnull_12(ptr %ptr, ptr null, ptr %ptr)
call void @arg_nonnull_12(ptr %ptr, ptr null, ptr null)
br label %ret
f:
call void @arg_nonnull_12(ptr null, ptr %ptr, ptr %ptr)
call void @arg_nonnull_12(ptr null, ptr %ptr, ptr null)
call void @arg_nonnull_12(ptr null, ptr null, ptr %ptr)
call void @arg_nonnull_12(ptr null, ptr null, ptr null)
br label %ret
ret:
ret void
}
define void @arg_nonnull_violation3_2(i1 %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation3_2
; TUNIT-SAME: (i1 noundef [[C:%.*]]) #[[ATTR0]] {
; TUNIT-NEXT: [[PTR:%.*]] = alloca i32, align 4
; TUNIT-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; TUNIT: t:
; TUNIT-NEXT: call void @arg_nonnull_12_noundef_2(ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) #[[ATTR7]]
; TUNIT-NEXT: call void @arg_nonnull_12_noundef_2(ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr noalias nocapture nofree noundef writeonly align 4294967296 null) #[[ATTR7]]
; TUNIT-NEXT: unreachable
; TUNIT: f:
; TUNIT-NEXT: unreachable
; TUNIT: ret:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation3_2
; CGSCC-SAME: (i1 noundef [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CGSCC-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; CGSCC: t:
; CGSCC-NEXT: call void @arg_nonnull_12_noundef_2(ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) #[[ATTR11]]
; CGSCC-NEXT: call void @arg_nonnull_12_noundef_2(ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], ptr noalias nocapture nofree noundef writeonly align 4294967296 null) #[[ATTR11]]
; CGSCC-NEXT: unreachable
; CGSCC: f:
; CGSCC-NEXT: unreachable
; CGSCC: ret:
; CGSCC-NEXT: ret void
;
%ptr = alloca i32
br i1 %c, label %t, label %f
t:
call void @arg_nonnull_12_noundef_2(ptr %ptr, ptr %ptr, ptr %ptr)
call void @arg_nonnull_12_noundef_2(ptr %ptr, ptr %ptr, ptr null)
call void @arg_nonnull_12_noundef_2(ptr %ptr, ptr null, ptr %ptr)
call void @arg_nonnull_12_noundef_2(ptr %ptr, ptr null, ptr null)
br label %ret
f:
call void @arg_nonnull_12_noundef_2(ptr null, ptr %ptr, ptr %ptr)
call void @arg_nonnull_12_noundef_2(ptr null, ptr %ptr, ptr null)
call void @arg_nonnull_12_noundef_2(ptr null, ptr null, ptr %ptr)
call void @arg_nonnull_12_noundef_2(ptr null, ptr null, ptr null)
br label %ret
ret:
ret void
}
; Tests for returned position
define nonnull ptr @returned_nonnnull(i32 %c) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@returned_nonnnull
; CHECK-SAME: (i32 noundef [[C:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: switch i32 [[C]], label [[ONDEFAULT:%.*]] [
; CHECK-NEXT: i32 0, label [[ONZERO:%.*]]
; CHECK-NEXT: i32 1, label [[ONONE:%.*]]
; CHECK-NEXT: ]
; CHECK: onzero:
; CHECK-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CHECK-NEXT: ret ptr [[PTR]]
; CHECK: onone:
; CHECK-NEXT: ret ptr null
; CHECK: ondefault:
; CHECK-NEXT: ret ptr undef
;
switch i32 %c, label %ondefault [ i32 0, label %onzero
i32 1, label %onone ]
onzero:
%ptr = alloca i32
ret ptr %ptr
onone:
ret ptr null
ondefault:
ret ptr undef
}
define noundef ptr @returned_noundef(i32 %c) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@returned_noundef
; CHECK-SAME: (i32 noundef [[C:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: switch i32 [[C]], label [[ONDEFAULT:%.*]] [
; CHECK-NEXT: i32 0, label [[ONZERO:%.*]]
; CHECK-NEXT: i32 1, label [[ONONE:%.*]]
; CHECK-NEXT: ]
; CHECK: onzero:
; CHECK-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CHECK-NEXT: ret ptr [[PTR]]
; CHECK: onone:
; CHECK-NEXT: ret ptr null
; CHECK: ondefault:
; CHECK-NEXT: unreachable
;
switch i32 %c, label %ondefault [ i32 0, label %onzero
i32 1, label %onone ]
onzero:
%ptr = alloca i32
ret ptr %ptr
onone:
ret ptr null
ondefault:
ret ptr undef
}
define nonnull noundef ptr @returned_nonnnull_noundef(i32 %c) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@returned_nonnnull_noundef
; CHECK-SAME: (i32 noundef [[C:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: switch i32 [[C]], label [[ONDEFAULT:%.*]] [
; CHECK-NEXT: i32 0, label [[ONZERO:%.*]]
; CHECK-NEXT: i32 1, label [[ONONE:%.*]]
; CHECK-NEXT: ]
; CHECK: onzero:
; CHECK-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CHECK-NEXT: ret ptr [[PTR]]
; CHECK: onone:
; CHECK-NEXT: unreachable
; CHECK: ondefault:
; CHECK-NEXT: unreachable
;
switch i32 %c, label %ondefault [ i32 0, label %onzero
i32 1, label %onone ]
onzero:
%ptr = alloca i32
ret ptr %ptr
onone:
ret ptr null
ondefault:
ret ptr undef
}
define noundef i32 @returned_nonnnull_noundef_int() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@returned_nonnnull_noundef_int
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: ret i32 0
;
ret i32 0
}
declare void @callee_int_arg(i32)
define void @callsite_noundef_1() {
; CHECK-LABEL: define {{[^@]+}}@callsite_noundef_1() {
; CHECK-NEXT: call void @callee_int_arg(i32 noundef 0)
; CHECK-NEXT: ret void
;
call void @callee_int_arg(i32 noundef 0)
ret void
}
declare void @callee_ptr_arg(ptr)
define void @callsite_noundef_2() {
; CHECK-LABEL: define {{[^@]+}}@callsite_noundef_2() {
; CHECK-NEXT: unreachable
;
call void @callee_ptr_arg(ptr noundef undef)
ret void
}
define i32 @argument_noundef1(i32 noundef %c) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@argument_noundef1
; CHECK-SAME: (i32 noundef returned [[C:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: ret i32 [[C]]
;
ret i32 %c
}
define i32 @violate_noundef_nonpointer() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@violate_noundef_nonpointer
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: ret i32 undef
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@violate_noundef_nonpointer
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: unreachable
;
%ret = call i32 @argument_noundef1(i32 undef)
ret i32 %ret
}
define ptr @argument_noundef2(ptr noundef %c) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@argument_noundef2
; CHECK-SAME: (ptr nofree noundef readnone returned "no-capture-maybe-returned" [[C:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: ret ptr [[C]]
;
ret ptr %c
}
define ptr @violate_noundef_pointer() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@violate_noundef_pointer
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: ret ptr undef
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@violate_noundef_pointer
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: ret ptr undef
;
%ret = call ptr @argument_noundef2(ptr undef)
ret ptr %ret
}
define internal noundef i32 @assumed_undef_is_ok(i1 %c, i32 %arg) {
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@assumed_undef_is_ok
; CGSCC-SAME: (i1 noundef [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: br i1 [[C]], label [[REC:%.*]], label [[RET:%.*]]
; CGSCC: rec:
; CGSCC-NEXT: br label [[RET]]
; CGSCC: ret:
; CGSCC-NEXT: ret i32 0
;
%stack = alloca i32
store i32 %arg, ptr %stack
br i1 %c, label %rec, label %ret
rec:
%call = call i32 @assumed_undef_is_ok(i1 false, i32 0)
store i32 %call, ptr %stack
br label %ret
ret:
%l = load i32, ptr %stack
ret i32 %l
}
define noundef i32 @assumed_undef_is_ok_caller(i1 %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@assumed_undef_is_ok_caller
; TUNIT-SAME: (i1 [[C:%.*]]) #[[ATTR0]] {
; TUNIT-NEXT: ret i32 0
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@assumed_undef_is_ok_caller
; CGSCC-SAME: (i1 noundef [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: [[CALL:%.*]] = call i32 @assumed_undef_is_ok(i1 noundef [[C]]) #[[ATTR10]]
; CGSCC-NEXT: ret i32 [[CALL]]
;
%call = call i32 @assumed_undef_is_ok(i1 %c, i32 undef)
ret i32 %call
}
;.
; TUNIT: attributes #[[ATTR0]] = { nofree norecurse nosync nounwind willreturn memory(none) }
; TUNIT: attributes #[[ATTR1]] = { nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(none) }
; TUNIT: attributes #[[ATTR2]] = { nofree norecurse nounwind willreturn memory(none) }
; TUNIT: attributes #[[ATTR3]] = { nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(write) }
; TUNIT: attributes #[[ATTR4]] = { nofree norecurse nounwind null_pointer_is_valid willreturn }
; TUNIT: attributes #[[ATTR5]] = { nofree norecurse noreturn nosync nounwind willreturn memory(none) }
; TUNIT: attributes #[[ATTR6]] = { nofree norecurse nosync nounwind willreturn memory(argmem: write) }
; TUNIT: attributes #[[ATTR7]] = { nofree nosync nounwind willreturn }
;.
; CGSCC: attributes #[[ATTR0]] = { nofree norecurse nosync nounwind willreturn memory(none) }
; CGSCC: attributes #[[ATTR1]] = { nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(none) }
; CGSCC: attributes #[[ATTR2]] = { nofree nosync nounwind willreturn memory(none) }
; CGSCC: attributes #[[ATTR3]] = { nofree norecurse nounwind willreturn memory(none) }
; CGSCC: attributes #[[ATTR4]] = { nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(write) }
; CGSCC: attributes #[[ATTR5]] = { nofree nosync nounwind willreturn memory(write) }
; CGSCC: attributes #[[ATTR6]] = { nofree norecurse nounwind null_pointer_is_valid willreturn }
; CGSCC: attributes #[[ATTR7]] = { nofree nounwind willreturn }
; CGSCC: attributes #[[ATTR8]] = { nofree norecurse noreturn nosync nounwind willreturn memory(none) }
; CGSCC: attributes #[[ATTR9]] = { nofree norecurse nosync nounwind willreturn memory(argmem: write) }
; CGSCC: attributes #[[ATTR10]] = { willreturn }
; CGSCC: attributes #[[ATTR11]] = { nounwind willreturn }
;.
|
