1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -S -loop-deletion -enable-new-pm=0 < %s | FileCheck %s
3
4; Make sure this does not crash due to incorrect SCEV invalidation (PR49967).
5
6define void @test() {
7; CHECK-LABEL: @test(
8; CHECK-NEXT:  entry:
9; CHECK-NEXT:    br label [[VECTOR_PH:%.*]]
10; CHECK:       vector.ph:
11; CHECK-NEXT:    br label [[FOR_BODY63:%.*]]
12; CHECK:       for.cond.cleanup62:
13; CHECK-NEXT:    br i1 true, label [[FOR_BODY151_PREHEADER:%.*]], label [[VECTOR_PH]]
14; CHECK:       for.body151.preheader:
15; CHECK-NEXT:    br label [[FOR_COND_CLEANUP150_LOOPEXIT:%.*]]
16; CHECK:       for.body63:
17; CHECK-NEXT:    [[I58_010:%.*]] = phi i16 [ 32, [[VECTOR_PH]] ]
18; CHECK-NEXT:    store i16 undef, i16* undef, align 1
19; CHECK-NEXT:    [[INC89:%.*]] = add nuw nsw i16 [[I58_010]], 1
20; CHECK-NEXT:    [[EXITCOND12_NOT:%.*]] = icmp eq i16 [[INC89]], 33
21; CHECK-NEXT:    br i1 [[EXITCOND12_NOT]], label [[FOR_COND_CLEANUP62:%.*]], label [[FOR_BODY63_FOR_BODY63_CRIT_EDGE:%.*]]
22; CHECK:       for.body63.for.body63_crit_edge:
23; CHECK-NEXT:    unreachable
24; CHECK:       for.cond.cleanup150.loopexit:
25; CHECK-NEXT:    unreachable
26;
27entry:
28  br label %vector.ph
29
30vector.ph:                                        ; preds = %for.cond.cleanup62, %entry
31  br label %for.body63
32
33for.cond.cleanup62:                               ; preds = %for.body63
34  br i1 true, label %for.body151.preheader, label %vector.ph
35
36for.body151.preheader:                            ; preds = %for.cond.cleanup62
37  br label %for.body151
38
39for.body63:                                       ; preds = %for.body63, %vector.ph
40  %i58.010 = phi i16 [ 32, %vector.ph ], [ %inc89, %for.body63 ]
41  store i16 undef, i16* undef, align 1
42  %inc89 = add nuw nsw i16 %i58.010, 1
43  %exitcond12.not = icmp eq i16 %inc89, 33
44  br i1 %exitcond12.not, label %for.cond.cleanup62, label %for.body63
45
46for.cond.cleanup150.loopexit:                     ; preds = %for.body151
47  unreachable
48
49for.body151:                                      ; preds = %for.body151.preheader, %for.body151
50  %i146.29 = phi i16 [ %inc177, %for.body151 ], [ undef, %for.body151.preheader ]
51  %inc177 = add nuw nsw i16 %i146.29, 1
52  %exitcond.not = icmp eq i16 %inc177, 32
53  br i1 %exitcond.not, label %for.cond.cleanup150.loopexit, label %for.body151
54}
55