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
|
; RUN: opt -passes=gvn -S < %s | FileCheck %s
@a = external local_unnamed_addr global i32, align 4
@b = external local_unnamed_addr global i32, align 4
; Function Attrs: nounwind readnone
declare ptr @j() local_unnamed_addr #0
; CHECK: define {{.*}}@k()
define i64 @k() local_unnamed_addr {
bb:
br i1 undef, label %bb10.preheader, label %bb3
bb10.preheader: ; preds = %bb
br label %bb13
bb3: ; preds = %bb
%i4 = load i32, ptr @a, align 4
%i5.not = icmp eq i32 %i4, 0
br label %bb7
bb7: ; preds = %bb3
%i8 = tail call ptr @j()
br label %bb37
bb13: ; preds = %bb34, %bb10.preheader
br i1 undef, label %bb30thread-pre-split, label %bb16
bb16: ; preds = %bb13
%i17 = tail call ptr @j()
br i1 undef, label %bb22thread-pre-split, label %bb37.loopexit
bb22thread-pre-split: ; preds = %bb16
br label %bb27
bb27: ; preds = %bb22thread-pre-split
br i1 undef, label %bb30thread-pre-split, label %bb37.loopexit
bb30thread-pre-split: ; preds = %bb27, %bb13
%i31.pr = load i32, ptr @a, align 4
%i32.not2 = icmp eq i32 %i31.pr, 0
br label %bb34
bb34: ; preds = %bb30thread-pre-split
br i1 undef, label %bb37.loopexit, label %bb13
bb37.loopexit: ; preds = %bb34, %bb27, %bb16
br label %bb37
bb37: ; preds = %bb37.loopexit, %bb7
%i38 = load i32, ptr @a, align 4
store i32 %i38, ptr @b, align 4
%i39 = tail call ptr @j()
unreachable
}
attributes #0 = { nounwind readnone }
|
