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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
; RUN: opt -passes=objc-arc -S < %s | FileCheck %s
declare void @llvm.objc.release(ptr %x)
declare ptr @llvm.objc.retain(ptr %x)
declare ptr @llvm.objc.autorelease(ptr %x)
declare ptr @llvm.objc.autoreleaseReturnValue(ptr %x)
declare ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %x)
declare ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %x)
declare ptr @tmp(ptr)
; Never tail call objc_autorelease.
; CHECK: define ptr @test0(ptr %x) [[NUW:#[0-9]+]] {
; CHECK: %tmp0 = call ptr @llvm.objc.autorelease(ptr %x) [[NUW]]
; CHECK: %tmp1 = call ptr @llvm.objc.autorelease(ptr %x) [[NUW]]
; CHECK: }
define ptr @test0(ptr %x) nounwind {
entry:
%tmp0 = call ptr @llvm.objc.autorelease(ptr %x)
%tmp1 = tail call ptr @llvm.objc.autorelease(ptr %x)
ret ptr %x
}
; Always tail call autoreleaseReturnValue.
; CHECK: define ptr @test1(ptr %x) [[NUW]] {
; CHECK: %tmp0 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %x) [[NUW]]
; CHECK: %tmp1 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %x) [[NUW]]
; CHECK: }
define ptr @test1(ptr %x) nounwind {
entry:
%tmp0 = call ptr @llvm.objc.autoreleaseReturnValue(ptr %x)
%tmp1 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %x)
ret ptr %x
}
; Always tail call objc_retain.
; CHECK: define ptr @test2(ptr %x) [[NUW]] {
; CHECK: %tmp0 = tail call ptr @llvm.objc.retain(ptr %x) [[NUW]]
; CHECK: %tmp1 = tail call ptr @llvm.objc.retain(ptr %x) [[NUW]]
; CHECK: }
define ptr @test2(ptr %x) nounwind {
entry:
%tmp0 = call ptr @llvm.objc.retain(ptr %x)
%tmp1 = tail call ptr @llvm.objc.retain(ptr %x)
ret ptr %x
}
; Always tail call objc_retainAutoreleasedReturnValue unless it's annotated with
; notail.
; CHECK: define ptr @test3(ptr %x) [[NUW]] {
; CHECK: %tmp0 = tail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %y) [[NUW]]
; CHECK: %tmp1 = tail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %z) [[NUW]]
; CHECK: %tmp2 = notail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %z2) [[NUW]]
; CHECK: }
define ptr @test3(ptr %x) nounwind {
entry:
%y = call ptr @tmp(ptr %x)
%tmp0 = call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %y)
%z = call ptr @tmp(ptr %x)
%tmp1 = tail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %z)
%z2 = call ptr @tmp(ptr %x)
%tmp2 = notail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %z2)
ret ptr %x
}
; By itself, we should never change whether or not objc_release is tail called.
; CHECK: define void @test4(ptr %x) [[NUW]] {
; CHECK: call void @llvm.objc.release(ptr %x) [[NUW]]
; CHECK: tail call void @llvm.objc.release(ptr %x) [[NUW]]
; CHECK: }
define void @test4(ptr %x) nounwind {
entry:
call void @llvm.objc.release(ptr %x)
tail call void @llvm.objc.release(ptr %x)
ret void
}
; If we convert a tail called @llvm.objc.autoreleaseReturnValue to an
; @llvm.objc.autorelease, ensure that the tail call is removed.
; CHECK: define ptr @test5(ptr %x) [[NUW]] {
; CHECK: %tmp0 = call ptr @llvm.objc.autorelease(ptr %x) [[NUW]]
; CHECK: }
define ptr @test5(ptr %x) nounwind {
entry:
%tmp0 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %x)
ret ptr %tmp0
}
; Always tail call llvm.objc.unsafeClaimAutoreleasedReturnValue.
; CHECK: define ptr @test6(ptr %x) [[NUW]] {
; CHECK: %tmp0 = tail call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %y) [[NUW]]
; CHECK: %tmp1 = tail call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %z) [[NUW]]
; CHECK: }
define ptr @test6(ptr %x) nounwind {
entry:
%y = call ptr @tmp(ptr %x)
%tmp0 = call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %y)
%z = call ptr @tmp(ptr %x)
%tmp1 = tail call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %z)
ret ptr %x
}
; CHECK: attributes [[NUW]] = { nounwind }
|
