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// RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -fobjc-runtime-has-weak -fblocks -fobjc-arc -O2 -disable-llvm-passes -o - %s | FileCheck %s
@interface A
@end
id getObject();
void callee();
// Lifetime extension for binding a reference to an rvalue
// CHECK-LABEL: define void @_Z5test0v()
void test0() {
// CHECK: call i8* @_Z9getObjectv
// CHECK-NEXT: call i8* @llvm.objc.retainAutoreleasedReturnValue
const __strong id &ref1 = getObject();
// CHECK: call void @_Z6calleev
callee();
// CHECK: call i8* @_Z9getObjectv
// CHECK-NEXT: call i8* @llvm.objc.retainAutoreleasedReturnValue
// CHECK-NEXT: call i8* @llvm.objc.autorelease
const __autoreleasing id &ref2 = getObject();
// CHECK: call void @_Z6calleev
callee();
// CHECK: call void @llvm.objc.release
// CHECK: ret
}
// No lifetime extension when we're binding a reference to an lvalue.
// CHECK-LABEL: define void @_Z5test1RU8__strongP11objc_objectRU6__weakS0_
void test1(__strong id &x, __weak id &y) {
// CHECK-NOT: release
const __strong id &ref1 = x;
const __autoreleasing id &ref2 = x;
const __weak id &ref3 = y;
// CHECK: ret void
}
typedef __strong id strong_id;
//CHECK: define void @_Z5test3v
void test3() {
// CHECK: [[REF:%.*]] = alloca i8**, align 8
// CHECK: call i8* @llvm.objc.initWeak
// CHECK-NEXT: store i8**
const __weak id &ref = strong_id();
// CHECK-NEXT: call void @_Z6calleev()
callee();
// CHECK-NEXT: call void @llvm.objc.destroyWeak
// CHECK-NEXT: [[PTR:%.*]] = bitcast i8*** [[REF]] to i8*
// CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 8, i8* [[PTR]])
// CHECK-NEXT: ret void
}
// CHECK-LABEL: define void @_Z5test4RU8__strongP11objc_object
void test4(__strong id &x) {
// CHECK: call i8* @llvm.objc.retain
__strong A* const &ar = x;
// CHECK: store i32 17, i32*
int i = 17;
// CHECK: call void @llvm.objc.release(
// CHECK: ret void
}
void sink(__strong A* &&);
// CHECK-LABEL: define void @_Z5test5RU8__strongP11objc_object
void test5(__strong id &x) {
// CHECK: [[REFTMP:%.*]] = alloca {{%.*}}*, align 8
// CHECK: [[I:%.*]] = alloca i32, align 4
// CHECK: [[OBJ_ID:%.*]] = call i8* @llvm.objc.retain(
// CHECK-NEXT: [[OBJ_A:%.*]] = bitcast i8* [[OBJ_ID]] to [[A:%[a-zA-Z0-9]+]]*
// CHECK-NEXT: store [[A]]* [[OBJ_A]], [[A]]** [[REFTMP:%[a-zA-Z0-9]+]]
// CHECK-NEXT: call void @_Z4sinkOU8__strongP1A
sink(x);
// CHECK-NEXT: [[OBJ_A:%[a-zA-Z0-9]+]] = load [[A]]*, [[A]]** [[REFTMP]]
// CHECK-NEXT: [[OBJ_ID:%[a-zA-Z0-9]+]] = bitcast [[A]]* [[OBJ_A]] to i8*
// CHECK-NEXT: call void @llvm.objc.release
// 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, i32
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: ret void
}
// CHECK-LABEL: define internal void @__cxx_global_var_init(
// CHECK: call i8* @_Z9getObjectv
// CHECK-NEXT: call i8* @llvm.objc.retainAutoreleasedReturnValue
const __strong id &global_ref = getObject();
// Note: we intentionally don't release the object.
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