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87 lines
3.5 KiB
Swift
87 lines
3.5 KiB
Swift
// RUN: %target-swift-frontend -Xllvm -sil-full-demangle -emit-silgen -enable-sil-ownership %s | %FileCheck %s
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class C {
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func f() -> Int { return 42 }
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}
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func takeClosure(fn: @escaping () -> Int) {}
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struct A {
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weak var x: C?
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}
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// CHECK: sil hidden @_T04weak5test01cyAA1CC_tF : $@convention(thin) (@owned C) -> () {
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func test0(c c: C) {
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var c = c
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// CHECK: bb0(%0 : @owned $C):
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// CHECK: [[C:%.*]] = alloc_box ${ var C }
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// CHECK-NEXT: [[PBC:%.*]] = project_box [[C]]
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var a: A
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// CHECK: [[A1:%.*]] = alloc_box ${ var A }
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// CHECK: [[MARKED_A1:%.*]] = mark_uninitialized [var] [[A1]]
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// CHECK-NEXT: [[PBA:%.*]] = project_box [[MARKED_A1]]
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weak var x = c
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// CHECK: [[X:%.*]] = alloc_box ${ var @sil_weak Optional<C> }, var, name "x"
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// CHECK-NEXT: [[PBX:%.*]] = project_box [[X]]
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// Implicit conversion
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// CHECK-NEXT: [[READ:%.*]] = begin_access [read] [unknown] [[PBC]]
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// CHECK-NEXT: [[TMP:%.*]] = load [copy] [[READ]] : $*C
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// CHECK-NEXT: end_access [[READ]]
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// CHECK-NEXT: [[OPTVAL:%.*]] = enum $Optional<C>, #Optional.some!enumelt.1, [[TMP]] : $C
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// CHECK-NEXT: store_weak [[OPTVAL]] to [initialization] [[PBX]] : $*@sil_weak Optional<C>
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// CHECK-NEXT: destroy_value [[OPTVAL]] : $Optional<C>
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a.x = c
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// Implicit conversion
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// CHECK-NEXT: [[READ:%.*]] = begin_access [read] [unknown] [[PBC]]
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// CHECK-NEXT: [[TMP:%.*]] = load [copy] [[READ]] : $*C
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// CHECK-NEXT: end_access [[READ]]
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// CHECK-NEXT: [[OPTVAL:%.*]] = enum $Optional<C>, #Optional.some!enumelt.1, [[TMP]] : $C
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// Drill to a.x
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// CHECK-NEXT: [[WRITE:%.*]] = begin_access [modify] [unknown] [[PBA]]
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// CHECK-NEXT: [[A_X:%.*]] = struct_element_addr [[WRITE]] : $*A, #A.x
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// Store to a.x.
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// CHECK-NEXT: store_weak [[OPTVAL]] to [[A_X]] : $*@sil_weak Optional<C>
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// CHECK-NEXT: destroy_value [[OPTVAL]] : $Optional<C>
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}
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// <rdar://problem/16871284> silgen crashes on weak capture
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// CHECK: closure #1 () -> Swift.Int in weak.testClosureOverWeak() -> ()
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// CHECK-LABEL: sil private @_T04weak19testClosureOverWeakyyFSiycfU_ : $@convention(thin) (@guaranteed { var @sil_weak Optional<C> }) -> Int {
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// CHECK: bb0(%0 : @guaranteed ${ var @sil_weak Optional<C> }):
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// CHECK-NEXT: %1 = project_box %0
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// CHECK-NEXT: debug_value_addr %1 : $*@sil_weak Optional<C>, var, name "bC", argno 1
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// CHECK-NEXT: [[READ:%.*]] = begin_access [read] [unknown] %1
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// CHECK-NEXT: [[STK:%.*]] = alloc_stack $Optional<C>
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// CHECK-NEXT: [[VAL:%.*]] = load_weak [[READ]] : $*@sil_weak Optional<C>
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// CHECK-NEXT: store [[VAL]] to [init] [[STK]] : $*Optional<C>
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func testClosureOverWeak() {
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weak var bC = C()
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takeClosure { bC!.f() }
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}
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class CC {
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weak var x: CC?
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// CHECK-LABEL: sil hidden @_T04weak2CCC{{[_0-9a-zA-Z]*}}fc : $@convention(method) (@owned CC) -> @owned CC {
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// CHECK: bb0([[SELF:%.*]] : @owned $CC):
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// CHECK: [[UNINIT_SELF:%.*]] = mark_uninitialized [rootself] [[SELF]] : $CC
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// CHECK: [[FOO:%.*]] = alloc_box ${ var Optional<CC> }, var, name "foo"
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// CHECK: [[PB:%.*]] = project_box [[FOO]]
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// CHECK: [[BORROWED_UNINIT_SELF:%.*]] = begin_borrow [[UNINIT_SELF]]
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// CHECK: [[X:%.*]] = ref_element_addr [[BORROWED_UNINIT_SELF]] : $CC, #CC.x
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// CHECK: [[READ:%.*]] = begin_access [read] [dynamic] [[X]] : $*@sil_weak Optional<CC>
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// CHECK: [[VALUE:%.*]] = load_weak [[READ]] : $*@sil_weak Optional<CC>
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// CHECK: store [[VALUE]] to [init] [[PB]] : $*Optional<CC>
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// CHECK: end_borrow [[BORROWED_UNINIT_SELF]] from [[UNINIT_SELF]]
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// CHECK: destroy_value [[FOO]]
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// CHECK: } // end sil function '_T04weak2CCC{{[_0-9a-zA-Z]*}}fc'
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init() {
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var foo = x
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}
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}
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