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166 lines
6.7 KiB
Swift
166 lines
6.7 KiB
Swift
// RUN: %target-swift-frontend -emit-silgen %s | %FileCheck %s
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func takeClosure(_ fn: () -> Int) {}
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class C {
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func f() -> Int { return 42 }
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}
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struct A {
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unowned var x: C
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}
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_ = A(x: C())
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// CHECK-LABEL: sil hidden @_T07unowned1AV{{[_0-9a-zA-Z]*}}fC
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// CHECK: bb0([[X:%.*]] : $C, %1 : $@thin A.Type):
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// CHECK: [[X_UNOWNED:%.*]] = ref_to_unowned [[X]] : $C to $@sil_unowned C
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// CHECK: unowned_retain [[X_UNOWNED]]
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// CHECK: destroy_value [[X]]
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// CHECK: [[A:%.*]] = struct $A ([[X_UNOWNED]] : $@sil_unowned C)
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// CHECK: return [[A]]
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// CHECK: }
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protocol P {}
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struct X: P {}
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struct AddressOnly {
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unowned var x: C
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var p: P
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}
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_ = AddressOnly(x: C(), p: X())
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// CHECK-LABEL: sil hidden @_T07unowned11AddressOnlyV{{[_0-9a-zA-Z]*}}fC
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// CHECK: bb0([[RET:%.*]] : $*AddressOnly, [[X:%.*]] : $C, {{.*}}):
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// CHECK: [[X_ADDR:%.*]] = struct_element_addr [[RET]] : $*AddressOnly, #AddressOnly.x
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// CHECK: [[X_UNOWNED:%.*]] = ref_to_unowned [[X]] : $C to $@sil_unowned C
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// CHECK: unowned_retain [[X_UNOWNED]] : $@sil_unowned C
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// CHECK: store [[X_UNOWNED]] to [init] [[X_ADDR]]
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// CHECK: destroy_value [[X]]
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// CHECK: }
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// CHECK-LABEL: sil hidden @_T07unowned5test0yAA1CC1c_tF : $@convention(thin) (@owned C) -> () {
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func test0(c c: C) {
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// CHECK: bb0([[ARG:%.*]] : $C):
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var a: A
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// CHECK: [[A1:%.*]] = alloc_box ${ var A }, var, name "a"
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// CHECK: [[MARKED_A1:%.*]] = mark_uninitialized [var] [[A1]]
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// CHECK: [[PBA:%.*]] = project_box [[MARKED_A1]]
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unowned var x = c
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// CHECK: [[X:%.*]] = alloc_box ${ var @sil_unowned C }
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// CHECK: [[PBX:%.*]] = project_box [[X]]
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// CHECK: [[BORROWED_ARG:%.*]] = begin_borrow [[ARG]]
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// CHECK: [[ARG_COPY:%.*]] = copy_value [[BORROWED_ARG]]
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// CHECK: [[T2:%.*]] = ref_to_unowned [[ARG_COPY]] : $C to $@sil_unowned C
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// CHECK: unowned_retain [[T2]] : $@sil_unowned C
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// CHECK: store [[T2]] to [init] [[PBX]] : $*@sil_unowned C
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// CHECK: destroy_value [[ARG_COPY]]
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// CHECK: end_borrow [[BORROWED_ARG]] from [[ARG]]
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a.x = c
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// CHECK: [[BORROWED_ARG:%.*]] = begin_borrow [[ARG]]
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// CHECK: [[ARG_COPY:%.*]] = copy_value [[BORROWED_ARG]]
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// CHECK: [[WRITE:%.*]] = begin_access [modify] [unknown] [[PBA]]
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// CHECK: [[T1:%.*]] = struct_element_addr [[WRITE]] : $*A, #A.x
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// CHECK: [[T2:%.*]] = ref_to_unowned [[ARG_COPY]] : $C
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// CHECK: unowned_retain [[T2]] : $@sil_unowned C
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// CHECK: assign [[T2]] to [[T1]] : $*@sil_unowned C
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// CHECK: destroy_value [[ARG_COPY]]
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// CHECK: end_borrow [[BORROWED_ARG]] from [[ARG]]
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a.x = x
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// CHECK: [[READ:%.*]] = begin_access [read] [unknown] [[PBX]]
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// CHECK: [[T2:%.*]] = load [take] [[READ]] : $*@sil_unowned C
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// CHECK: strong_retain_unowned [[T2]] : $@sil_unowned C
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// CHECK: [[T3:%.*]] = unowned_to_ref [[T2]] : $@sil_unowned C to $C
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// CHECK: [[WRITE:%.*]] = begin_access [modify] [unknown] [[PBA]]
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// CHECK: [[XP:%.*]] = struct_element_addr [[WRITE]] : $*A, #A.x
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// CHECK: [[T4:%.*]] = ref_to_unowned [[T3]] : $C to $@sil_unowned C
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// CHECK: unowned_retain [[T4]] : $@sil_unowned C
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// CHECK: assign [[T4]] to [[XP]] : $*@sil_unowned C
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// CHECK: destroy_value [[T3]] : $C
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// CHECK: destroy_value [[X]]
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// CHECK: destroy_value [[MARKED_A1]]
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// CHECK: destroy_value [[ARG]]
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}
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// CHECK: } // end sil function '_T07unowned5test0yAA1CC1c_tF'
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// CHECK-LABEL: sil hidden @{{.*}}testunowned_local
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func testunowned_local() -> C {
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// CHECK: [[C:%.*]] = apply
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let c = C()
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// CHECK: [[UC:%.*]] = alloc_box ${ var @sil_unowned C }, let, name "uc"
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// CHECK: [[PB_UC:%.*]] = project_box [[UC]]
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// CHECK: [[BORROWED_C:%.*]] = begin_borrow [[C]]
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// CHECK: [[C_COPY:%.*]] = copy_value [[BORROWED_C]]
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// CHECK: [[tmp1:%.*]] = ref_to_unowned [[C_COPY]] : $C to $@sil_unowned C
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// CHECK: unowned_retain [[tmp1]]
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// CHECK: store [[tmp1]] to [init] [[PB_UC]]
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// CHECK: destroy_value [[C_COPY]]
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// CHECK: end_borrow [[BORROWED_C]] from [[C]]
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unowned let uc = c
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// CHECK: [[tmp2:%.*]] = load [take] [[PB_UC]]
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// CHECK: strong_retain_unowned [[tmp2]]
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// CHECK: [[tmp3:%.*]] = unowned_to_ref [[tmp2]]
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return uc
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// CHECK: destroy_value [[UC]]
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// CHECK: destroy_value [[C]]
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// CHECK: return [[tmp3]]
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}
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// <rdar://problem/16877510> capturing an unowned let crashes in silgen
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func test_unowned_let_capture(_ aC : C) {
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unowned let bC = aC
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takeClosure { bC.f() }
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}
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// CHECK-LABEL: sil private @_T07unowned05test_A12_let_captureyAA1CCFSiycfU_ : $@convention(thin) (@owned @sil_unowned C) -> Int {
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// CHECK: bb0([[ARG:%.*]] : $@sil_unowned C):
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// CHECK-NEXT: debug_value %0 : $@sil_unowned C, let, name "bC", argno 1
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// CHECK-NEXT: strong_retain_unowned [[ARG]] : $@sil_unowned C
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// CHECK-NEXT: [[UNOWNED_ARG:%.*]] = unowned_to_ref [[ARG]] : $@sil_unowned C to $C
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// CHECK-NEXT: [[FUN:%.*]] = class_method [[UNOWNED_ARG]] : $C, #C.f!1 : (C) -> () -> Int, $@convention(method) (@guaranteed C) -> Int
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// CHECK-NEXT: [[RESULT:%.*]] = apply [[FUN]]([[UNOWNED_ARG]]) : $@convention(method) (@guaranteed C) -> Int
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// CHECK-NEXT: destroy_value [[UNOWNED_ARG]]
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// CHECK-NEXT: destroy_value [[ARG]] : $@sil_unowned C
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// CHECK-NEXT: return [[RESULT]] : $Int
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// <rdar://problem/16880044> unowned let properties don't work as struct and class members
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class TestUnownedMember {
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unowned let member : C
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init(inval: C) {
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self.member = inval
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}
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}
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// CHECK-LABEL: sil hidden @_T07unowned17TestUnownedMemberCAcA1CC5inval_tcfc :
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// CHECK: bb0([[ARG1:%.*]] : $C, [[SELF_PARAM:%.*]] : $TestUnownedMember):
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// CHECK: [[SELF:%.*]] = mark_uninitialized [rootself] [[SELF_PARAM]] : $TestUnownedMember
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// CHECK: [[BORROWED_SELF:%.*]] = begin_borrow [[SELF]]
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// CHECK: [[BORROWED_ARG1:%.*]] = begin_borrow [[ARG1]]
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// CHECK: [[ARG1_COPY:%.*]] = copy_value [[BORROWED_ARG1]]
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// CHECK: [[FIELDPTR:%.*]] = ref_element_addr [[BORROWED_SELF]] : $TestUnownedMember, #TestUnownedMember.member
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// CHECK: [[INVAL:%.*]] = ref_to_unowned [[ARG1_COPY]] : $C to $@sil_unowned C
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// CHECK: unowned_retain [[INVAL]] : $@sil_unowned C
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// CHECK: assign [[INVAL]] to [[FIELDPTR]] : $*@sil_unowned C
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// CHECK: destroy_value [[ARG1_COPY]] : $C
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// CHECK: end_borrow [[BORROWED_ARG1]] from [[ARG1]]
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// CHECK: end_borrow [[BORROWED_SELF]] from [[SELF]]
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// CHECK: [[RET_SELF:%.*]] = copy_value [[SELF]]
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// CHECK: destroy_value [[SELF]]
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// CHECK: destroy_value [[ARG1]]
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// CHECK: return [[RET_SELF]] : $TestUnownedMember
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// CHECK: } // end sil function '_T07unowned17TestUnownedMemberCAcA1CC5inval_tcfc'
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// Just verify that lowering an unowned reference to a type parameter
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// doesn't explode.
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struct Unowned<T: AnyObject> {
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unowned var object: T
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}
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func takesUnownedStruct(_ z: Unowned<C>) {}
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// CHECK-LABEL: sil hidden @_T07unowned18takesUnownedStructyAA0C0VyAA1CCGF : $@convention(thin) (@owned Unowned<C>) -> ()
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