1; RUN: opt -objc-arc -S < %s | FileCheck %s
2
3declare void @alterRefCount()
4declare void @use(i8*)
5
6@g0 = global i8* null, align 8
7
8; Check that ARC optimizer doesn't reverse the order of the retain call and the
9; release call when there are debug instructions.
10
11; CHECK: call i8* @llvm.objc.retain(i8* %x)
12; CHECK: call void @llvm.objc.release(i8* %x)
13
14define i32 @test(i8* %x, i8* %y, i8 %z, i32 %i) {
15  %i.addr = alloca i32, align 4
16  store i32 %i, i32* %i.addr, align 4
17  %v1 = tail call i8* @llvm.objc.retain(i8* %x)
18  store i8 %z, i8* %x
19  call void @llvm.dbg.declare(metadata i32* %i.addr, metadata !9, metadata !DIExpression()), !dbg !10
20  call void @alterRefCount()
21  tail call void @llvm.objc.release(i8* %x)
22  ret i32 %i
23}
24
25; ARC optimizer shouldn't move the release call, which is a precise release call
26; past the call to @alterRefCount.
27
28; CHECK-LABEL: define void @test2(
29; CHECK: call void @alterRefCount(
30; CHECK: call void @llvm.objc.release(
31
32define void @test2() {
33  %v0 = load i8*, i8** @g0, align 8
34  %v1 = tail call i8* @llvm.objc.retain(i8* %v0)
35  tail call void @use(i8* %v0)
36  tail call void @alterRefCount()
37  tail call void @llvm.objc.release(i8* %v0)
38  ret void
39}
40
41declare void @llvm.dbg.declare(metadata, metadata, metadata)
42declare i8* @llvm.objc.retain(i8*) local_unnamed_addr
43declare void @llvm.objc.release(i8*) local_unnamed_addr
44
45!llvm.module.flags = !{!0, !1}
46
47!0 = !{i32 2, !"Dwarf Version", i32 4}
48!1 = !{i32 2, !"Debug Info Version", i32 3}
49!2 = !DILocalVariable(name: "i", arg: 1, scope: !3, file: !4, line: 1, type: !7)
50!3 = distinct !DISubprogram(name: "test", scope: !4, file: !4, line: 1, type: !5, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !8, retainedNodes: !9)
51!4 = !DIFile(filename: "test.m", directory: "dir")
52!5 = !DISubroutineType(types: !6)
53!6 = !{!7, !7}
54!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
55!8 = distinct !DICompileUnit(language: DW_LANG_ObjC, file: !4, isOptimized: false, runtimeVersion: 2, emissionKind: FullDebug, enums: !9, nameTableKind: None)
56!9 = !{}
57!10 = !DILocation(line: 1, column: 14, scope: !3)
58