arc-move.mm
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// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -O2 -std=c++11 -disable-llvm-passes -o - %s | FileCheck %s
// define void @_Z11simple_moveRU8__strongP11objc_objectS2_
void simple_move(__strong id &x, __strong id &y) {
// CHECK: = load i8*, i8**
// CHECK: store i8* null
// CHECK: = load i8*, i8**
// CHECK: store i8*
// CHECK-NEXT: call void @llvm.objc.release
x = static_cast<__strong id&&>(y);
// CHECK-NEXT: ret void
}
template<typename T>
struct remove_reference {
typedef T type;
};
template<typename T>
struct remove_reference<T&> {
typedef T type;
};
template<typename T>
struct remove_reference<T&&> {
typedef T type;
};
template<typename T>
typename remove_reference<T>::type&& move(T &&x) {
return static_cast<typename remove_reference<T>::type&&>(x);
}
// CHECK-LABEL: define void @_Z12library_moveRU8__strongP11objc_objectS2_
void library_move(__strong id &x, __strong id &y) {
// CHECK: call nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) i8** @_Z4moveIRU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_
// CHECK: load i8*, i8**
// CHECK: store i8* null, i8**
// CHECK: load i8**, i8***
// CHECK-NEXT: load i8*, i8**
// CHECK-NEXT: store i8*
// CHECK-NEXT: call void @llvm.objc.release
// CHECK-NEXT: ret void
x = move(y);
}
// CHECK-LABEL: define void @_Z12library_moveRU8__strongP11objc_object
void library_move(__strong id &y) {
// CHECK: [[X:%.*]] = alloca i8*, align 8
// CHECK: [[I:%.*]] = alloca i32, align 4
// CHECK: [[XPTR1:%.*]] = bitcast i8** [[X]] to i8*
// CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 8, i8* [[XPTR1]])
// CHECK: [[Y:%[a-zA-Z0-9]+]] = call nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) i8** @_Z4moveIRU8__strongP11objc_objectEON16remove_referenceIT_E4typeEOS5_
// Load the object
// CHECK-NEXT: [[OBJ:%[a-zA-Z0-9]+]] = load i8*, i8** [[Y]]
// Null out y
// CHECK-NEXT: store i8* null, i8** [[Y]]
// Initialize x with the object
// CHECK-NEXT: store i8* [[OBJ]], i8** [[X:%[a-zA-Z0-9]+]]
id x = move(y);
// CHECK-NEXT: [[IPTR1:%.*]] = bitcast i32* [[I]] to i8*
// CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 4, i8* [[IPTR1]])
// CHECK-NEXT: store i32 17
int i = 17;
// CHECK-NEXT: [[IPTR2:%.*]] = bitcast i32* [[I]] to i8*
// CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 4, i8* [[IPTR2]])
// CHECK-NEXT: [[OBJ:%[a-zA-Z0-9]+]] = load i8*, i8** [[X]]
// CHECK-NEXT: call void @llvm.objc.release(i8* [[OBJ]])
// CHECK-NEXT: [[XPTR2:%.*]] = bitcast i8** [[X]] to i8*
// CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 8, i8* [[XPTR2]])
// CHECK-NEXT: ret void
}
// CHECK-LABEL: define void @_Z10const_moveRU8__strongKP11objc_object(
void const_move(const __strong id &x) {
// CHECK: [[Y:%.*]] = alloca i8*,
// CHECK: [[X:%.*]] = call nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) i8** @_Z4moveIRU8__strongKP11objc_objectEON16remove_referenceIT_E4typeEOS5_(
// CHECK-NEXT: [[T0:%.*]] = load i8*, i8** [[X]]
// CHECK-NEXT: [[T1:%.*]] = call i8* @llvm.objc.retain(i8* [[T0]])
// CHECK-NEXT: store i8* [[T1]], i8** [[Y]]
// CHECK-NEXT: [[T0:%.*]] = load i8*, i8** [[Y]]
// CHECK-NEXT: call void @llvm.objc.release(i8* [[T0]])
id y = move(x);
}