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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
; RUN: opt -objc-arc -S < %s | FileCheck %s
; rdar://11229925
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
%struct.__block_byref_weakLogNTimes = type { i8*, %struct.__block_byref_weakLogNTimes*, i32, i32, i8*, i8*, void (...)* }
%struct.__block_descriptor = type { i64, i64 }
; Don't optimize away the retainBlock, because the object's address "escapes"
; with the objc_storeWeak call.
; CHECK-LABEL: define void @test0(
; CHECK: %tmp7 = call i8* @objc_retainBlock(i8* %tmp6) [[NUW:#[0-9]+]], !clang.arc.copy_on_escape !0
; CHECK: call void @objc_release(i8* %tmp7) [[NUW]], !clang.imprecise_release !0
; CHECK: }
define void @test0() nounwind {
entry:
%weakLogNTimes = alloca %struct.__block_byref_weakLogNTimes, align 8
%block = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, align 8
%byref.isa = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 0
store i8* null, i8** %byref.isa, align 8
%byref.forwarding = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 1
store %struct.__block_byref_weakLogNTimes* %weakLogNTimes, %struct.__block_byref_weakLogNTimes** %byref.forwarding, align 8
%byref.flags = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 2
store i32 33554432, i32* %byref.flags, align 8
%byref.size = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 3
store i32 48, i32* %byref.size, align 4
%tmp1 = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 4
store i8* bitcast (void (i8*, i8*)* @__Block_byref_object_copy_ to i8*), i8** %tmp1, align 8
%tmp2 = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 5
store i8* bitcast (void (i8*)* @__Block_byref_object_dispose_ to i8*), i8** %tmp2, align 8
%weakLogNTimes1 = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 6
%tmp3 = bitcast void (...)** %weakLogNTimes1 to i8**
%tmp4 = call i8* @objc_initWeak(i8** %tmp3, i8* null) nounwind
%block.isa = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 0
store i8* null, i8** %block.isa, align 8
%block.flags = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 1
store i32 1107296256, i32* %block.flags, align 8
%block.reserved = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 2
store i32 0, i32* %block.reserved, align 4
%block.invoke = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 3
store i8* bitcast (void (i8*, i32)* @__main_block_invoke_0 to i8*), i8** %block.invoke, align 8
%block.descriptor = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 4
store %struct.__block_descriptor* null, %struct.__block_descriptor** %block.descriptor, align 8
%block.captured = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 5
%tmp5 = bitcast %struct.__block_byref_weakLogNTimes* %weakLogNTimes to i8*
store i8* %tmp5, i8** %block.captured, align 8
%tmp6 = bitcast <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block to i8*
%tmp7 = call i8* @objc_retainBlock(i8* %tmp6) nounwind, !clang.arc.copy_on_escape !0
%tmp8 = load %struct.__block_byref_weakLogNTimes** %byref.forwarding, align 8
%weakLogNTimes3 = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %tmp8, i64 0, i32 6
%tmp9 = bitcast void (...)** %weakLogNTimes3 to i8**
%tmp10 = call i8* @objc_storeWeak(i8** %tmp9, i8* %tmp7) nounwind
%tmp11 = getelementptr inbounds i8* %tmp7, i64 16
%tmp12 = bitcast i8* %tmp11 to i8**
%tmp13 = load i8** %tmp12, align 8
%tmp14 = bitcast i8* %tmp13 to void (i8*, i32)*
call void %tmp14(i8* %tmp7, i32 10) nounwind, !clang.arc.no_objc_arc_exceptions !0
call void @objc_release(i8* %tmp7) nounwind, !clang.imprecise_release !0
call void @_Block_object_dispose(i8* %tmp5, i32 8) nounwind
call void @objc_destroyWeak(i8** %tmp3) nounwind
ret void
}
; Like test0, but it makes a regular call instead of a storeWeak call,
; so the optimization is valid.
; CHECK-LABEL: define void @test1(
; CHECK-NOT: @objc_retainBlock
; CHECK: }
define void @test1() nounwind {
entry:
%weakLogNTimes = alloca %struct.__block_byref_weakLogNTimes, align 8
%block = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, align 8
%byref.isa = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 0
store i8* null, i8** %byref.isa, align 8
%byref.forwarding = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 1
store %struct.__block_byref_weakLogNTimes* %weakLogNTimes, %struct.__block_byref_weakLogNTimes** %byref.forwarding, align 8
%byref.flags = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 2
store i32 33554432, i32* %byref.flags, align 8
%byref.size = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 3
store i32 48, i32* %byref.size, align 4
%tmp1 = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 4
store i8* bitcast (void (i8*, i8*)* @__Block_byref_object_copy_ to i8*), i8** %tmp1, align 8
%tmp2 = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 5
store i8* bitcast (void (i8*)* @__Block_byref_object_dispose_ to i8*), i8** %tmp2, align 8
%weakLogNTimes1 = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 6
%tmp3 = bitcast void (...)** %weakLogNTimes1 to i8**
%tmp4 = call i8* @objc_initWeak(i8** %tmp3, i8* null) nounwind
%block.isa = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 0
store i8* null, i8** %block.isa, align 8
%block.flags = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 1
store i32 1107296256, i32* %block.flags, align 8
%block.reserved = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 2
store i32 0, i32* %block.reserved, align 4
%block.invoke = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 3
store i8* bitcast (void (i8*, i32)* @__main_block_invoke_0 to i8*), i8** %block.invoke, align 8
%block.descriptor = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 4
store %struct.__block_descriptor* null, %struct.__block_descriptor** %block.descriptor, align 8
%block.captured = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 5
%tmp5 = bitcast %struct.__block_byref_weakLogNTimes* %weakLogNTimes to i8*
store i8* %tmp5, i8** %block.captured, align 8
%tmp6 = bitcast <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block to i8*
%tmp7 = call i8* @objc_retainBlock(i8* %tmp6) nounwind, !clang.arc.copy_on_escape !0
%tmp8 = load %struct.__block_byref_weakLogNTimes** %byref.forwarding, align 8
%weakLogNTimes3 = getelementptr inbounds %struct.__block_byref_weakLogNTimes* %tmp8, i64 0, i32 6
%tmp9 = bitcast void (...)** %weakLogNTimes3 to i8**
%tmp10 = call i8* @not_really_objc_storeWeak(i8** %tmp9, i8* %tmp7) nounwind
%tmp11 = getelementptr inbounds i8* %tmp7, i64 16
%tmp12 = bitcast i8* %tmp11 to i8**
%tmp13 = load i8** %tmp12, align 8
%tmp14 = bitcast i8* %tmp13 to void (i8*, i32)*
call void %tmp14(i8* %tmp7, i32 10) nounwind, !clang.arc.no_objc_arc_exceptions !0
call void @objc_release(i8* %tmp7) nounwind, !clang.imprecise_release !0
call void @_Block_object_dispose(i8* %tmp5, i32 8) nounwind
call void @objc_destroyWeak(i8** %tmp3) nounwind
ret void
}
declare void @__Block_byref_object_copy_(i8*, i8*) nounwind
declare void @__Block_byref_object_dispose_(i8*) nounwind
declare void @objc_destroyWeak(i8**)
declare i8* @objc_initWeak(i8**, i8*)
declare void @__main_block_invoke_0(i8* nocapture, i32) nounwind ssp
declare void @_Block_object_dispose(i8*, i32)
declare i8* @objc_retainBlock(i8*)
declare i8* @objc_storeWeak(i8**, i8*)
declare i8* @not_really_objc_storeWeak(i8**, i8*)
declare void @objc_release(i8*)
!0 = metadata !{}
; CHECK: attributes [[NUW]] = { nounwind }
; CHECK: attributes #1 = { nounwind ssp }
|
