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
|
; RUN: opt < %s -lcssa -verify -S -o /dev/null
; This bugpoint reduced test case used to assert when removing unused PHI nodes.
; Just verify that we do not assert/crash.
define void @test() {
entry:
br label %gazank
gazank:
%value = phi i16 [ 0, %entry ], [ undef, %gazonk ]
br i1 undef, label %gazink, label %qqq
gazink:
br i1 undef, label %gazonk, label %infinite.loop.pred
gazonk:
br i1 undef, label %exit1, label %gazank
qqq:
br i1 undef, label %www, label %exit2
www:
br i1 undef, label %qqq, label %foo.pred
foo.pred:
br label %foo
foo:
br i1 undef, label %bar, label %exit1.pred
bar:
br i1 undef, label %foo, label %exit2.pred
unreachable1:
br i1 undef, label %foo, label %exit2.pred
exit1.pred:
br label %exit1
exit1:
ret void
exit2.pred:
br label %exit2
exit2:
ret void
infinite.loop.pred:
br label %infinite.loop
infinite.loop:
%dead = phi i16 [ %value, %infinite.loop.pred ], [ 0, %infinite.loop ]
br label %infinite.loop
}
|
