xref: /llvm-project/llvm/test/Transforms/ObjCARC/weak-dce.ll (revision 01e4f41b43b57dee751146fde9992c660bd7c714) 
1; RUN: opt -S -passes=objc-arc < %s | FileCheck %s
2; rdar://11434915
3
4; Delete the weak calls and replace them with just the net retain.
5
6;      CHECK: define void @test0(ptr %p) {
7; CHECK-NEXT: call ptr @llvm.objc.retain(ptr %p)
8; CHECK-NEXT: ret void
9
10define void @test0(ptr %p) {
11  %weakBlock = alloca ptr, align 8
12  %tmp7 = call ptr @llvm.objc.initWeak(ptr %weakBlock, ptr %p) nounwind
13  %tmp26 = call ptr @llvm.objc.loadWeakRetained(ptr %weakBlock) nounwind
14  call void @llvm.objc.destroyWeak(ptr %weakBlock) nounwind
15  ret void
16}
17
18;      CHECK: define ptr @test1(ptr %p) {
19; CHECK-NEXT: call ptr @llvm.objc.retain(ptr %p)
20; CHECK-NEXT: ret ptr %p
21
22define ptr @test1(ptr %p) {
23  %weakBlock = alloca ptr, align 8
24  %tmp7 = call ptr @llvm.objc.initWeak(ptr %weakBlock, ptr %p) nounwind
25  %tmp26 = call ptr @llvm.objc.loadWeakRetained(ptr %weakBlock) nounwind
26  call void @llvm.objc.destroyWeak(ptr %weakBlock) nounwind
27  ret ptr %tmp26
28}
29
30;      CHECK: define ptr @test2(ptr %p, ptr %q) {
31; CHECK-NEXT: call ptr @llvm.objc.retain(ptr %q)
32; CHECK-NEXT: ret ptr %q
33
34define ptr @test2(ptr %p, ptr %q) {
35  %weakBlock = alloca ptr, align 8
36  %tmp7 = call ptr @llvm.objc.initWeak(ptr %weakBlock, ptr %p) nounwind
37  %tmp19 = call ptr @llvm.objc.storeWeak(ptr %weakBlock, ptr %q) nounwind
38  %tmp26 = call ptr @llvm.objc.loadWeakRetained(ptr %weakBlock) nounwind
39  call void @llvm.objc.destroyWeak(ptr %weakBlock) nounwind
40  ret ptr %tmp26
41}
42
43declare ptr @llvm.objc.initWeak(ptr, ptr)
44declare void @llvm.objc.destroyWeak(ptr)
45declare ptr @llvm.objc.loadWeakRetained(ptr)
46declare ptr @llvm.objc.storeWeak(ptr %weakBlock, ptr %q)
47