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
|
; Make sure we don't end up in an infinite recursion in singleReachablePHIPath().
; RUN: opt < %s -passes=newgvn -S | FileCheck %s
@c = external global i64, align 8
; CHECK-LABEL: define void @tinkywinky() {
; CHECK: entry:
; CHECK-NEXT: br i1 undef, label %l2, label %if.then
; CHECK: if.then: ; preds = %entry
; CHECK-NEXT: br label %for.body
; CHECK: ph: ; preds = %back, %ontrue
; CHECK-NEXT: br label %for.body
; CHECK: for.body: ; preds = %ph, %if.then
; CHECK-NEXT: br i1 undef, label %ontrue, label %onfalse
; CHECK: onfalse: ; preds = %for.body
; CHECK-NEXT: %patatino = load i64, i64* @c
; CHECK-NEXT: ret void
; CHECK: ontrue: ; preds = %for.body
; CHECK-NEXT: %dipsy = load i64, i64* @c
; CHECK-NEXT: br label %ph
; CHECK: back: ; preds = %l2
; CHECK-NEXT: store i8 poison, i8* null
; CHECK-NEXT: br label %ph
; CHECK: end: ; preds = %l2
; CHECK-NEXT: ret void
; CHECK: l2: ; preds = %entry
; CHECK-NEXT: br i1 false, label %back, label %end
; CHECK-NEXT: }
define void @tinkywinky() {
entry:
br i1 undef, label %l2, label %if.then
if.then:
br label %for.body
ph:
br label %for.body
for.body:
br i1 undef, label %ontrue, label %onfalse
onfalse:
%patatino = load i64, i64* @c
store i64 %patatino, i64* @c
ret void
ontrue:
%dipsy = load i64, i64* @c
store i64 %dipsy, i64* @c
br label %ph
back:
br label %ph
end:
ret void
l2:
br i1 false, label %back, label %end
}
|
