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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
; RUN: opt -S -objc-arc < %s | FileCheck %s
declare i8* @objc_retain(i8*)
declare void @objc_release(i8*)
declare i8* @objc_retainAutoreleasedReturnValue(i8*)
declare i8* @objc_msgSend(i8*, i8*, ...)
declare void @use_pointer(i8*)
declare void @callee()
declare i8* @returner()
; ARCOpt shouldn't try to move the releases to the block containing the invoke.
; CHECK-LABEL: define void @test0(
; CHECK: invoke.cont:
; CHECK: call void @objc_release(i8* %zipFile) [[NUW:#[0-9]+]], !clang.imprecise_release !0
; CHECK: ret void
; CHECK: lpad:
; CHECK: call void @objc_release(i8* %zipFile) [[NUW]], !clang.imprecise_release !0
; CHECK: ret void
; CHECK-NEXT: }
define void @test0(i8* %zipFile) {
entry:
call i8* @objc_retain(i8* %zipFile) nounwind
call void @use_pointer(i8* %zipFile)
invoke void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*)*)(i8* %zipFile)
to label %invoke.cont unwind label %lpad
invoke.cont: ; preds = %entry
call void @objc_release(i8* %zipFile) nounwind, !clang.imprecise_release !0
ret void
lpad: ; preds = %entry
%exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
cleanup
call void @objc_release(i8* %zipFile) nounwind, !clang.imprecise_release !0
ret void
}
; ARCOpt should move the release before the callee calls.
; CHECK-LABEL: define void @test1(
; CHECK: invoke.cont:
; CHECK: call void @objc_release(i8* %zipFile) [[NUW]], !clang.imprecise_release !0
; CHECK: call void @callee()
; CHECK: br label %done
; CHECK: lpad:
; CHECK: call void @objc_release(i8* %zipFile) [[NUW]], !clang.imprecise_release !0
; CHECK: call void @callee()
; CHECK: br label %done
; CHECK: done:
; CHECK-NEXT: ret void
; CHECK-NEXT: }
define void @test1(i8* %zipFile) {
entry:
call i8* @objc_retain(i8* %zipFile) nounwind
call void @use_pointer(i8* %zipFile)
invoke void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*)*)(i8* %zipFile)
to label %invoke.cont unwind label %lpad
invoke.cont: ; preds = %entry
call void @callee()
br label %done
lpad: ; preds = %entry
%exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0
cleanup
call void @callee()
br label %done
done:
call void @objc_release(i8* %zipFile) nounwind, !clang.imprecise_release !0
ret void
}
; The optimizer should ignore invoke unwind paths consistently.
; PR12265
; CHECK: define void @test2() {
; CHECK: invoke.cont:
; CHECK-NEXT: call i8* @objc_retain
; CHECK-NOT: @objc_r
; CHECK: finally.cont:
; CHECK-NEXT: call void @objc_release
; CHECK-NOT: @objc
; CHECK: finally.rethrow:
; CHECK-NOT: @objc
; CHECK: }
define void @test2() {
entry:
%call = invoke i8* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i8* ()*)()
to label %invoke.cont unwind label %finally.rethrow, !clang.arc.no_objc_arc_exceptions !0
invoke.cont: ; preds = %entry
%tmp1 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void ()*)(), !clang.arc.no_objc_arc_exceptions !0
invoke void @use_pointer(i8* %call)
to label %finally.cont unwind label %finally.rethrow, !clang.arc.no_objc_arc_exceptions !0
finally.cont: ; preds = %invoke.cont
tail call void @objc_release(i8* %call) nounwind, !clang.imprecise_release !0
ret void
finally.rethrow: ; preds = %invoke.cont, %entry
%tmp2 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__objc_personality_v0 to i8*)
catch i8* null
unreachable
}
; Don't try to place code on invoke critical edges.
; CHECK-LABEL: define void @test3(
; CHECK: if.end:
; CHECK-NEXT: call void @objc_release(i8* %p) [[NUW]]
; CHECK-NEXT: ret void
; CHECK-NEXT: }
define void @test3(i8* %p, i1 %b) {
entry:
%0 = call i8* @objc_retain(i8* %p)
call void @callee()
br i1 %b, label %if.else, label %if.then
if.then:
invoke void @use_pointer(i8* %p)
to label %if.end unwind label %lpad, !clang.arc.no_objc_arc_exceptions !0
if.else:
invoke void @use_pointer(i8* %p)
to label %if.end unwind label %lpad, !clang.arc.no_objc_arc_exceptions !0
lpad:
%r = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__objc_personality_v0 to i8*)
cleanup
ret void
if.end:
call void @objc_release(i8* %p)
ret void
}
; Like test3, but with ARC-relevant exception handling.
; CHECK-LABEL: define void @test4(
; CHECK: lpad:
; CHECK-NEXT: %r = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__objc_personality_v0 to i8*)
; CHECK-NEXT: cleanup
; CHECK-NEXT: call void @objc_release(i8* %p) [[NUW]]
; CHECK-NEXT: ret void
; CHECK: if.end:
; CHECK-NEXT: call void @objc_release(i8* %p) [[NUW]]
; CHECK-NEXT: ret void
; CHECK-NEXT: }
define void @test4(i8* %p, i1 %b) {
entry:
%0 = call i8* @objc_retain(i8* %p)
call void @callee()
br i1 %b, label %if.else, label %if.then
if.then:
invoke void @use_pointer(i8* %p)
to label %if.end unwind label %lpad
if.else:
invoke void @use_pointer(i8* %p)
to label %if.end unwind label %lpad
lpad:
%r = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__objc_personality_v0 to i8*)
cleanup
call void @objc_release(i8* %p)
ret void
if.end:
call void @objc_release(i8* %p)
ret void
}
; Don't turn the retainAutoreleaseReturnValue into retain, because it's
; for an invoke which we can assume codegen will put immediately prior.
; CHECK-LABEL: define void @test5(
; CHECK: call i8* @objc_retainAutoreleasedReturnValue(i8* %z)
; CHECK: }
define void @test5() {
entry:
%z = invoke i8* @returner()
to label %if.end unwind label %lpad, !clang.arc.no_objc_arc_exceptions !0
lpad:
%r13 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__objc_personality_v0 to i8*)
cleanup
ret void
if.end:
call i8* @objc_retainAutoreleasedReturnValue(i8* %z)
ret void
}
; Like test5, but there's intervening code.
; CHECK-LABEL: define void @test6(
; CHECK: call i8* @objc_retain(i8* %z)
; CHECK: }
define void @test6() {
entry:
%z = invoke i8* @returner()
to label %if.end unwind label %lpad, !clang.arc.no_objc_arc_exceptions !0
lpad:
%r13 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__objc_personality_v0 to i8*)
cleanup
ret void
if.end:
call void @callee()
call i8* @objc_retainAutoreleasedReturnValue(i8* %z)
ret void
}
declare i32 @__gxx_personality_v0(...)
declare i32 @__objc_personality_v0(...)
; CHECK: attributes [[NUW]] = { nounwind }
!0 = metadata !{}
|
