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
|
; RUN: opt -basicaa -objc-arc -S < %s | FileCheck %s
target datalayout = "e-p:64:64:64"
declare i8* @objc_retain(i8*)
declare i8* @objc_retainAutorelease(i8*)
declare void @objc_release(i8*)
declare i8* @objc_autorelease(i8*)
declare void @clang.arc.use(...)
declare void @test0_helper(i8*, i8**)
; Ensure that we honor clang.arc.use as a use and don't miscompile
; the reduced test case from <rdar://13195034>.
;
; FIXME: the fact that we re-order retains w.r.t. @clang.arc.use could
; be problematic if we get run twice, e.g. under LTO.
;
; CHECK: define void @test0(
; CHECK: @objc_retain(i8* %x)
; CHECK-NEXT: store i8* %y, i8** %temp0
; CHECK-NEXT: @objc_retain(i8* %y)
; CHECK-NEXT: call void @test0_helper
; CHECK-NEXT: [[VAL1:%.*]] = load i8** %temp0
; CHECK-NEXT: call void (...)* @clang.arc.use(i8* %y)
; CHECK-NEXT: @objc_retain(i8* [[VAL1]])
; CHECK-NEXT: @objc_release(i8* %y)
; CHECK-NEXT: store i8* [[VAL1]], i8** %temp1
; CHECK-NEXT: call void @test0_helper
; CHECK-NEXT: [[VAL2:%.*]] = load i8** %temp1
; CHECK-NEXT: call void (...)* @clang.arc.use(i8* [[VAL1]])
; CHECK-NEXT: @objc_retain(i8* [[VAL2]])
; CHECK-NEXT: @objc_release(i8* [[VAL1]])
; CHECK-NEXT: @objc_autorelease(i8* %x)
; CHECK-NEXT: store i8* %x, i8** %out
; CHECK-NEXT: @objc_release(i8* [[VAL2]])
; CHECK-NEXT: ret void
define void @test0(i8** %out, i8* %x, i8* %y) {
entry:
%temp0 = alloca i8*, align 8
%temp1 = alloca i8*, align 8
%0 = call i8* @objc_retain(i8* %x) nounwind
%1 = call i8* @objc_retain(i8* %y) nounwind
store i8* %y, i8** %temp0
call void @test0_helper(i8* %x, i8** %temp0)
%val1 = load i8** %temp0
%2 = call i8* @objc_retain(i8* %val1) nounwind
call void (...)* @clang.arc.use(i8* %y) nounwind
call void @objc_release(i8* %y) nounwind
store i8* %val1, i8** %temp1
call void @test0_helper(i8* %x, i8** %temp1)
%val2 = load i8** %temp1
%3 = call i8* @objc_retain(i8* %val2) nounwind
call void (...)* @clang.arc.use(i8* %val1) nounwind
call void @objc_release(i8* %val1) nounwind
%4 = call i8* @objc_retain(i8* %x) nounwind
%5 = call i8* @objc_autorelease(i8* %x) nounwind
store i8* %x, i8** %out
call void @objc_release(i8* %val2) nounwind
call void @objc_release(i8* %x) nounwind
ret void
}
|
