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
|
; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -passes=loop-simplifycfg %s | FileCheck %s
; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -passes='require<domtree>,loop(loop-simplifycfg)' %s | FileCheck %s
declare ptr @fake_personality_function()
declare void @foo()
define i32 @test_remove_lpad(i1 %exitcond) personality ptr @fake_personality_function {
; CHECK-LABEL: @test_remove_lpad(
entry:
br label %for.body
for.body:
br i1 0, label %never, label %next
next:
br label %latch
latch:
br i1 %exitcond, label %exit, label %for.body
exit:
ret i32 0
never:
invoke void @foo() to label %next unwind label %never-unwind
never-unwind:
; CHECK: never-unwind:
; CHECK-NEXT: unreachable
%res = landingpad token cleanup
unreachable
}
define i32 @test_remove_phi_lpad(i1 %exitcond) personality ptr @fake_personality_function {
; CHECK-LABEL: @test_remove_phi_lpad(
entry:
br label %for.body
for.body:
br i1 0, label %never, label %next
next:
br label %latch
latch:
br i1 %exitcond, label %exit, label %for.body
exit:
ret i32 0
never:
invoke void @foo() to label %next unwind label %never-unwind
never-unwind:
; CHECK: never-unwind:
; CHECK-NEXT: ret i32 poison
%p = phi i32 [1, %never]
%res = landingpad token cleanup
ret i32 %p
}
define i32 @test_split_remove_phi_lpad_(i1 %exitcond) personality ptr @fake_personality_function {
; CHECK-LABEL: @test_split_remove_phi_lpad_(
entry:
invoke void @foo() to label %for.body unwind label %unwind-bb
for.body:
br i1 0, label %never, label %next
next:
br label %latch
latch:
br i1 %exitcond, label %exit, label %for.body
exit:
ret i32 0
never:
invoke void @foo() to label %next unwind label %unwind-bb
unwind-bb:
; CHECK: unwind-bb.loopexit:
; CHECK-NEXT: br label %unwind-bb
%p = phi i32 [1, %never], [2, %entry]
%res = landingpad token cleanup
ret i32 %p
}
|
