1// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -O2 -std=c++11 -disable-llvm-optzns -o - %s | FileCheck %s
2
3// define void @_Z11simple_moveRU8__strongP11objc_objectS2_
4void simple_move(__strong id &x, __strong id &y) {
5  // CHECK: = load i8**
6  // CHECK: store i8* null
7  // CHECK: = load i8**
8  // CHECK: store i8*
9  // CHECK-NEXT: call void @objc_release
10  x = static_cast<__strong id&&>(y);
11  // CHECK-NEXT: ret void
12}
13
14template<typename T>
15struct remove_reference {
16  typedef T type;
17};
18
19template<typename T>
20struct remove_reference<T&> {
21  typedef T type;
22};
23
24template<typename T>
25struct remove_reference<T&&> {
26  typedef T type;
27};
28
29template<typename T>
30typename remove_reference<T>::type&& move(T &&x) {
31  return static_cast<typename remove_reference<T>::type&&>(x);
32}
33
34// CHECK-LABEL: define void @_Z12library_moveRU8__strongP11objc_objectS2_
35void library_move(__strong id &x, __strong id &y) {
36  // CHECK: call i8** @_Z4moveIRU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_
37  // CHECK: load i8**
38  // CHECK: store i8* null, i8**
39  // CHECK: load i8***
40  // CHECK-NEXT: load i8**
41  // CHECK-NEXT: store i8*
42  // CHECK-NEXT: call void @objc_release
43  // CHECK-NEXT: ret void
44  x = move(y);
45}
46
47// CHECK-LABEL: define void @_Z12library_moveRU8__strongP11objc_object
48void library_move(__strong id &y) {
49  // CHECK: [[Y:%[a-zA-Z0-9]+]] = call i8** @_Z4moveIRU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_
50  // Load the object
51  // CHECK-NEXT: [[OBJ:%[a-zA-Z0-9]+]] = load i8** [[Y]]
52  // Null out y
53  // CHECK-NEXT: store i8* null, i8** [[Y]]
54  // Initialize x with the object
55  // CHECK-NEXT: store i8* [[OBJ]], i8** [[X:%[a-zA-Z0-9]+]]
56  id x = move(y);
57
58  // CHECK-NEXT: store i32 17
59  int i = 17;
60  // CHECK-NEXT: [[OBJ:%[a-zA-Z0-9]+]] = load i8** [[X]]
61  // CHECK-NEXT: call void @objc_release(i8* [[OBJ]])
62  // CHECK-NEXT: ret void
63}
64
65// CHECK-LABEL: define void @_Z10const_moveRKU8__strongP11objc_object(
66void const_move(const __strong id &x) {
67  // CHECK:      [[Y:%.*]] = alloca i8*,
68  // CHECK:      [[X:%.*]] = call i8** @_Z4moveIRKU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_(
69  // CHECK-NEXT: [[T0:%.*]] = load i8** [[X]]
70  // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retain(i8* [[T0]])
71  // CHECK-NEXT: store i8* [[T1]], i8** [[Y]]
72  // CHECK-NEXT: [[T0:%.*]] = load i8** [[Y]]
73  // CHECK-NEXT: call void @objc_release(i8* [[T0]])
74  id y = move(x);
75}
76