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// RUN: %target-swift-emit-silgen -module-name unowned %s | %FileCheck %s
func takeClosure(_ fn: () -> Int) {}
class C {
func f() -> Int { return 42 }
}
struct A {
unowned var x: C
}
_ = A(x: C())
// CHECK-LABEL: sil hidden [ossa] @$s7unowned1AV{{[_0-9a-zA-Z]*}}fC
// CHECK: bb0([[X:%.*]] : @owned $C, %1 : $@thin A.Type):
// CHECK: [[X_UNOWNED:%.*]] = ref_to_unowned [[X]] : $C to $@sil_unowned C
// CHECK: [[X_UNOWNED_COPY:%.*]] = copy_value [[X_UNOWNED]]
// CHECK: destroy_value [[X]]
// CHECK: [[A:%.*]] = struct $A ([[X_UNOWNED_COPY]] : $@sil_unowned C)
// CHECK: return [[A]]
// CHECK: }
protocol P {}
struct X: P {}
struct AddressOnly {
unowned var x: C
var p: P
}
_ = AddressOnly(x: C(), p: X())
// CHECK-LABEL: sil hidden [ossa] @$s7unowned11AddressOnlyV{{[_0-9a-zA-Z]*}}fC
// CHECK: bb0([[RET:%.*]] : $*AddressOnly, [[X:%.*]] : @owned $C, {{.*}}):
// CHECK: [[X_ADDR:%.*]] = struct_element_addr [[RET]] : $*AddressOnly, #AddressOnly.x
// CHECK: [[X_UNOWNED:%.*]] = ref_to_unowned [[X]] : $C to $@sil_unowned C
// CHECK: [[X_UNOWNED_COPY:%.*]] = copy_value [[X_UNOWNED]] : $@sil_unowned C
// CHECK: store [[X_UNOWNED_COPY]] to [init] [[X_ADDR]]
// CHECK: destroy_value [[X]]
// CHECK: }
// CHECK-LABEL: sil hidden [ossa] @$s7unowned5test01cyAA1CC_tF : $@convention(thin) (@guaranteed C) -> () {
func test0(c c: C) {
// CHECK: bb0([[ARG:%.*]] : @guaranteed $C):
var a: A
// CHECK: [[A1:%.*]] = alloc_box ${ var A }, var, name "a"
// CHECK: [[MARKED_A1:%.*]] = mark_uninitialized [var] [[A1]]
// CHECK: [[MARKED_A1_LIFETIME:%[^,]+]] = begin_borrow [lexical] [var_decl] [[MARKED_A1]]
// CHECK: [[PBA:%.*]] = project_box [[MARKED_A1_LIFETIME]]
unowned var x = c
// CHECK: [[X:%.*]] = alloc_box ${ var @sil_unowned C }
// CHECK: [[X_LIFETIME:%[^,]+]] = begin_borrow [lexical] [var_decl] [[X]]
// CHECK: [[PBX:%.*]] = project_box [[X_LIFETIME]]
// CHECK: [[ARG_COPY:%.*]] = copy_value [[ARG]]
// CHECK: [[T2:%.*]] = ref_to_unowned [[ARG_COPY]] : $C to $@sil_unowned C
// CHECK: [[T2_COPY:%.*]] = copy_value [[T2]] : $@sil_unowned C
// CHECK: store [[T2_COPY]] to [init] [[PBX]] : $*@sil_unowned C
// CHECK: destroy_value [[ARG_COPY]]
a.x = c
// CHECK: [[ARG_COPY:%.*]] = copy_value [[ARG]]
// CHECK: [[WRITE:%.*]] = begin_access [modify] [unknown] [[PBA]]
// CHECK: [[T1:%.*]] = struct_element_addr [[WRITE]] : $*A, #A.x
// CHECK: [[T2:%.*]] = ref_to_unowned [[ARG_COPY]] : $C
// CHECK: [[T2_COPY:%.*]] = copy_value [[T2]] : $@sil_unowned C
// CHECK: assign [[T2_COPY]] to [[T1]] : $*@sil_unowned C
// CHECK: destroy_value [[ARG_COPY]]
a.x = x
// CHECK: [[READ:%.*]] = begin_access [read] [unknown] [[PBX]]
// CHECK: [[T2:%.*]] = load_borrow [[READ]] : $*@sil_unowned C
// CHECK: [[T3:%.*]] = strong_copy_unowned_value [[T2]] : $@sil_unowned C
// CHECK: end_borrow [[T2]]
// CHECK: [[WRITE:%.*]] = begin_access [modify] [unknown] [[PBA]]
// CHECK: [[XP:%.*]] = struct_element_addr [[WRITE]] : $*A, #A.x
// CHECK: [[T4:%.*]] = ref_to_unowned [[T3]] : $C to $@sil_unowned C
// CHECK: [[T4_COPY:%.*]] = copy_value [[T4]] : $@sil_unowned C
// CHECK: assign [[T4_COPY]] to [[XP]] : $*@sil_unowned C
// CHECK: destroy_value [[T3]] : $C
// CHECK: end_borrow [[X_LIFETIME]]
// CHECK: destroy_value [[X]]
// CHECK: end_borrow [[MARKED_A1_LIFETIME]]
// CHECK: destroy_value [[MARKED_A1]]
}
// CHECK: } // end sil function '$s7unowned5test01cyAA1CC_tF'
// CHECK-LABEL: sil hidden [ossa] @{{.*}}testunowned_local
func testunowned_local() -> C {
// CHECK: [[C:%.*]] = apply
let c = C()
// CHECK: [[MOVED_C:%.*]] = move_value [lexical] [var_decl] [[C]]
// CHECK: [[UC:%.*]] = alloc_box ${ var @sil_unowned C }, let, name "uc"
// CHECK: [[UC_LIFETIME:%[^,]+]] = begin_borrow [lexical] [var_decl] [[UC]]
// CHECK: [[PB_UC:%.*]] = project_box [[UC_LIFETIME]]
// CHECK: [[BORROWED_C:%.*]] = begin_borrow [[MOVED_C]]
// CHECK: [[C_COPY:%.*]] = copy_value [[BORROWED_C]]
// CHECK: [[tmp1:%.*]] = ref_to_unowned [[C_COPY]] : $C to $@sil_unowned C
// CHECK: [[tmp1_copy:%.*]] = copy_value [[tmp1]]
// CHECK: store [[tmp1_copy]] to [init] [[PB_UC]]
// CHECK: destroy_value [[C_COPY]]
unowned let uc = c
// CHECK: [[tmp2:%.*]] = load_borrow [[PB_UC]]
// CHECK: [[tmp3:%.*]] = strong_copy_unowned_value [[tmp2]]
// CHECK: end_borrow [[tmp2]]
return uc
// CHECK: end_borrow [[UC_LIFETIME]]
// CHECK: destroy_value [[UC]]
// CHECK: destroy_value [[MOVED_C]]
// CHECK: return [[tmp3]]
}
// <rdar://problem/16877510> capturing an unowned let crashes in silgen
func test_unowned_let_capture(_ aC : C) {
unowned let bC = aC
takeClosure { bC.f() }
}
// CHECK-LABEL: sil private [ossa] @$s7unowned05test_A12_let_captureyyAA1CCFSiyXEfU_ : $@convention(thin) (@guaranteed @sil_unowned C) -> Int {
// CHECK: bb0([[ARG:%.*]] : @closureCapture @guaranteed $@sil_unowned C):
// CHECK-NEXT: debug_value %0 : $@sil_unowned C, let, name "bC", argno 1
// CHECK-NEXT: [[UNOWNED_ARG:%.*]] = strong_copy_unowned_value [[ARG]] : $@sil_unowned C
// CHECK-NEXT: [[FUN:%.*]] = class_method [[UNOWNED_ARG]] : $C, #C.f : (C) -> () -> Int, $@convention(method) (@guaranteed C) -> Int
// CHECK-NEXT: [[RESULT:%.*]] = apply [[FUN]]([[UNOWNED_ARG]]) : $@convention(method) (@guaranteed C) -> Int
// CHECK-NEXT: destroy_value [[UNOWNED_ARG]]
// CHECK-NEXT: return [[RESULT]] : $Int
// <rdar://problem/16880044> unowned let properties don't work as struct and class members
class TestUnownedMember {
unowned let member : C
init(inval: C) {
self.member = inval
}
}
// CHECK-LABEL: sil hidden [ossa] @$s7unowned17TestUnownedMemberC5invalAcA1CC_tcfc :
// CHECK: bb0([[ARG1:%.*]] : @owned $C, [[SELF_PARAM:%.*]] : @owned $TestUnownedMember):
// CHECK: [[SELF:%.*]] = mark_uninitialized [rootself] [[SELF_PARAM]] : $TestUnownedMember
// CHECK: [[BORROWED_SELF:%.*]] = begin_borrow [[SELF]]
// CHECK: [[BORROWED_ARG1:%.*]] = begin_borrow [[ARG1]]
// CHECK: [[ARG1_COPY:%.*]] = copy_value [[BORROWED_ARG1]]
// CHECK: [[FIELDPTR:%.*]] = ref_element_addr [[BORROWED_SELF]] : $TestUnownedMember, #TestUnownedMember.member
// CHECK: [[INVAL:%.*]] = ref_to_unowned [[ARG1_COPY]] : $C to $@sil_unowned C
// CHECK: [[INVAL_COPY:%.*]] = copy_value [[INVAL]] : $@sil_unowned C
// CHECK: assign [[INVAL_COPY]] to [[FIELDPTR]] : $*@sil_unowned C
// CHECK: destroy_value [[ARG1_COPY]] : $C
// CHECK: end_borrow [[BORROWED_SELF]]
// CHECK: [[RET_SELF:%.*]] = copy_value [[SELF]]
// CHECK: destroy_value [[SELF]]
// CHECK: destroy_value [[ARG1]]
// CHECK: return [[RET_SELF]] : $TestUnownedMember
// CHECK: } // end sil function '$s7unowned17TestUnownedMemberC5invalAcA1CC_tcfc'
// Just verify that lowering an unowned reference to a type parameter
// doesn't explode.
struct Unowned<T: AnyObject> {
unowned var object: T
}
func takesUnownedStruct(_ z: Unowned<C>) {}
// CHECK-LABEL: sil hidden [ossa] @$s7unowned18takesUnownedStructyyAA0C0VyAA1CCGF : $@convention(thin) (@guaranteed Unowned<C>) -> ()
// Make sure we don't crash here
struct UnownedGenericCapture<T : AnyObject> {
var object: T
var optionalObject: T?
func f() -> () -> () {
return { [unowned object] in _ = object }
}
func g() -> () -> () {
return { [unowned optionalObject] in _ = optionalObject }
}
}
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