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borrow_expr.swift
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// RUN: %target-swift-frontend -enable-experimental-move-only -o - -Xllvm -sil-print-types -emit-silgen %s | %FileCheck %s
final class Klass {
func useKlass() {}
func doSomething() {}
func doSomething(_ k: Klass) {}
}
func useKlass(_ k: Klass) {}
struct Struct {
var k = Klass()
func doSomething() {}
func doSomething(_ k: Klass) {}
var computedK: Klass { Klass() }
}
func useStruct(_ s: Struct) {}
/////////////////////////
// Concrete Type Tests //
/////////////////////////
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr13simpleTestArgyyF : $@convention(thin) () -> () {
// CHECK: [[ADDR:%.*]] = project_box
//
// First check without the borrow:
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[VAL:%.*]] = load [copy] [[ACCESS]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr9useStructyyAA0D0VF : $@convention(thin) (@guaranteed Struct) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: destroy_value [[VAL]]
//
// Now with the borrow:
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[VAL:%.*]] = load_borrow [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr9useStructyyAA0D0VF : $@convention(thin) (@guaranteed Struct) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: end_borrow [[VAL]]
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr13simpleTestArgyyF'
func simpleTestArg() {
var s = Struct()
s = Struct()
// Without borrow.
useStruct(s)
// With borrow.
useStruct(_borrow s)
}
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr18simpleTestArgFieldyyF : $@convention(thin) () -> () {
// CHECK: [[ADDR:%.*]] = project_box
//
// First check without the borrow:
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[GEP:%.*]] = struct_element_addr [[ACCESS]] : $*Struct, #Struct.k
// CHECK: [[VAL:%.*]] = load [copy] [[GEP]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr8useKlassyyAA0D0CF : $@convention(thin) (@guaranteed Klass) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: destroy_value [[VAL]]
//
// Now with the borrow:
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[GEP:%.*]] = struct_element_addr [[ACCESS]] : $*Struct, #Struct.k
// CHECK: [[VAL:%.*]] = load_borrow [[GEP]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr8useKlassyyAA0D0CF : $@convention(thin) (@guaranteed Klass) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: end_borrow [[VAL]]
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr18simpleTestArgFieldyyF'
func simpleTestArgField() {
var s = Struct()
s = Struct()
// Without borrow.
useKlass(s.k)
// With borrow.
useKlass(_borrow s.k)
}
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr14simpleTestSelfyyF : $@convention(thin) () -> () {
// CHECK: [[ADDR:%.*]] = project_box
//
// First check without the borrow:
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[VAL:%.*]] = load [copy] [[ACCESS]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr6StructV11doSomethingyyF : $@convention(method) (@guaranteed Struct) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: destroy_value [[VAL]]
//
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[VAL:%.*]] = load [copy] [[ACCESS]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr6StructV11doSomethingyyAA5KlassCF : $@convention(method) (@guaranteed Klass, @guaranteed Struct) -> ()
// CHECK: apply [[FUNC]]({{%.*}}, [[VAL]])
// CHECK: destroy_value [[VAL]]
//
// Now with the borrow:
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[VAL:%.*]] = load_borrow [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr6StructV11doSomethingyyF : $@convention(method) (@guaranteed Struct) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: end_borrow [[VAL]]
// CHECK: end_access [[ACCESS]]
//
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[VAL:%.*]] = load_borrow [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr6StructV11doSomethingyyAA5KlassCF : $@convention(method) (@guaranteed Klass, @guaranteed Struct) -> ()
// CHECK: apply [[FUNC]]({{%.*}}, [[VAL]])
// CHECK: end_borrow [[VAL]]
// CHECK: end_access [[ACCESS]]
//
// CHECK: } // end sil function '$s11borrow_expr14simpleTestSelfyyF'
func simpleTestSelf() {
var s = Struct()
s = Struct()
// Without borrow.
s.doSomething()
s.doSomething(Klass())
// With borrow.
(_borrow s).doSomething()
(_borrow s).doSomething(Klass())
}
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr19simpleTestSelfFieldyyF : $@convention(thin) () -> () {
// CHECK: [[ADDR:%.*]] = project_box
//
// First check without the borrow:
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[GEP:%.*]] = struct_element_addr [[ACCESS]] : $*Struct, #Struct.k
// CHECK: [[VAL:%.*]] = load [copy] [[GEP]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr5KlassC11doSomethingyyF : $@convention(method) (@guaranteed Klass) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: destroy_value [[VAL]]
//
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[GEP:%.*]] = struct_element_addr [[ACCESS]] : $*Struct, #Struct.k
// CHECK: [[VAL:%.*]] = load [copy] [[GEP]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr5KlassC11doSomethingyyACF : $@convention(method) (@guaranteed Klass, @guaranteed Klass) -> ()
// CHECK: apply [[FUNC]]({{%.*}}, [[VAL]])
// CHECK: destroy_value [[VAL]]
//
// Now with the borrow:
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[GEP:%.*]] = struct_element_addr [[ACCESS]] : $*Struct, #Struct.k
// CHECK: [[VAL:%.*]] = load_borrow [[GEP]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr5KlassC11doSomethingyyF : $@convention(method) (@guaranteed Klass) -> (
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: end_borrow [[VAL]]
// CHECK: end_access [[ACCESS]]
//
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[GEP:%.*]] = struct_element_addr [[ACCESS]] : $*Struct, #Struct.k
// CHECK: [[VAL:%.*]] = load_borrow [[GEP]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr5KlassC11doSomethingyyACF : $@convention(method) (@guaranteed Klass, @guaranteed Klass) -> ()
// CHECK: apply [[FUNC]]({{%.*}}, [[VAL]])
// CHECK: end_borrow [[VAL]]
// CHECK: end_access [[ACCESS]]
//
// CHECK: } // end sil function '$s11borrow_expr19simpleTestSelfFieldyyF'
func simpleTestSelfField() {
var s = Struct()
s = Struct()
// Without borrow.
s.k.doSomething()
s.k.doSomething(Klass())
// With borrow.
(_borrow s.k).doSomething()
(_borrow s.k).doSomething(Klass())
}
////////////////////////
// Address Only Tests //
////////////////////////
protocol Q {
}
protocol P {
var q: Q { get /*_read*/ }
func doSomething()
func doSomething(_ k: Klass)
mutating func mutatingExtensionPointCallMethodOnSelf()
mutating func mutatingExtensionPointPassSelfAsArg()
}
func usePExistential(_ p: P) {}
func usePGeneric<T : P>(_ p: T) {}
func useQExistential<T : Q>(_ q: T) {}
func useQGeneric<T : Q>(_ q: T) {}
//--------------------------------------------------------------------------------
// Generics
//
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr20simpleTestGenericArgyyxAA1PRzlF : $@convention(thin) <T where T : P> (@in_guaranteed T) -> () {
// CHECK: [[ADDR:%.*]] = project_box
//
// First without borrow.
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[STACK:%.*]] = alloc_stack $T
// CHECK: copy_addr [[ACCESS]] to [init] [[STACK]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr11usePGenericyyxAA1PRzlF : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[FUNC]]<T>([[STACK]])
// CHECK: destroy_addr [[STACK]]
// CHECK: dealloc_stack [[STACK]]
//
// Now with borrow
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr11usePGenericyyxAA1PRzlF : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[FUNC]]<T>([[ACCESS]])
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr20simpleTestGenericArgyyxAA1PRzlF'
func simpleTestGenericArg<T : P>(_ pArg: T) {
var p = pArg
p = pArg
// Without borrow.
usePGeneric(p)
// With borrow.
usePGeneric(_borrow p)
}
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr25simpleTestGenericArgFieldyyxAA1PRzlF : $@convention(thin) <T where T : P> (@in_guaranteed T) -> () {
// CHECK: } // end sil function '$s11borrow_expr25simpleTestGenericArgFieldyyxAA1PRzlF'
func simpleTestGenericArgField<T : P>(_ pArg: T) {
var p = pArg
p = pArg
// Without borrow.
useQGeneric(p.q)
// With borrow.
//
// TODO: This doesn't work now. We should support this potentially for
// _read. But protocols seem to not support _read at this time.
// useQGeneric(_borrow p.q)
}
//--------------------------------------------------------------------------------
// Exisentials
//
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr24simpleTestExistentialArgyyAA1P_pF : $@convention(thin) (@in_guaranteed any P) -> () {
// CHECK: [[ADDR:%.*]] = project_box {{%.*}} : ${ var any P }, 0
//
// First without the borrow.
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[STACK:%.*]] = alloc_stack $any P
// CHECK: copy_addr [[ACCESS]] to [init] [[STACK]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr15usePExistentialyyAA1P_pF : $@convention(thin) (@in_guaranteed any P) -> ()
// CHECK: apply [[FUNC]]([[STACK]])
// CHECK: destroy_addr [[STACK]]
// CHECK: dealloc_stack [[STACK]]
//
// Now with the borrow.
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr15usePExistentialyyAA1P_pF : $@convention(thin) (@in_guaranteed any P) -> ()
// CHECK: apply [[FUNC]]([[ACCESS]])
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr24simpleTestExistentialArgyyAA1P_pF'
func simpleTestExistentialArg(_ pArg: P) {
var p = pArg
p = pArg
// Without borrow.
usePExistential(p)
// With borrow.
usePExistential(_borrow p)
}
func simpleTestExistentialArgField(_ pArg: P) {
var p = pArg
p = pArg
// Without borrow.
useQGeneric(p.q)
// With borrow.
//
// TODO: This doesn't work now. We should support this potentially for
// _read. But protocols seem to not support _read at this time.
// useQGeneric(_borrow p.q)
}
/////////////
// Globals //
/////////////
var globalKlass = Klass()
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr0A6GlobalyyF : $@convention(thin) () -> () {
// CHECK: [[ADDR:%.*]] = global_addr @$s11borrow_expr11globalKlassAA0D0Cvp
// CHECK: [[ACCESS:%.*]] = begin_access [read] [dynamic] [[ADDR]]
// CHECK: [[VAL:%.*]] = load_borrow [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr5KlassC11doSomethingyyF : $@convention(method) (@guaranteed Klass) -> ()
// CHECK: apply [[FUNC]]([[VAL]]
// CHECK: end_borrow [[VAL]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[ACCESS:%.*]] = begin_access [read] [dynamic] [[ADDR]]
// CHECK: [[VAL:%.*]] = load_borrow [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr8useKlassyyAA0D0CF : $@convention(thin) (@guaranteed Klass) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: end_borrow [[VAL]]
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr0A6GlobalyyF'
func borrowGlobal() {
(_borrow globalKlass).doSomething()
useKlass(_borrow globalKlass)
}
/////////////
// Methods //
/////////////
struct MethodTestingStruct {
var k = Klass()
func doSomething() {}
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr19MethodTestingStructV012mutatingCallC6OnSelfyyF : $@convention(method) (@inout MethodTestingStruct) -> () {
// CHECK: bb0([[SELF:%.*]] :
//
// Without borrow
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[SELF]]
// CHECK: [[VAL:%.*]] = load [copy] [[ACCESS]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr19MethodTestingStructV11doSomethingyyF : $@convention(method) (@guaranteed MethodTestingStruct) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: destroy_value [[VAL]]
//
// With borrow
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[SELF]]
// CHECK: [[VAL:%.*]] = load_borrow [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr19MethodTestingStructV11doSomethingyyF : $@convention(method) (@guaranteed MethodTestingStruct) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: end_borrow [[VAL]]
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr19MethodTestingStructV012mutatingCallC6OnSelfyyF'
mutating func mutatingCallMethodOnSelf() {
// Without borrow
doSomething()
// With borrow
(_borrow self).doSomething()
}
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr19MethodTestingStructV26mutatingPassSelfAsArgumentyyF : $@convention(method) (@inout MethodTestingStruct) -> () {
// CHECK: bb0([[SELF:%.*]] :
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[SELF]]
// CHECK: [[VAL:%.*]] = load [copy] [[ACCESS]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr22useMethodTestingStructyyAA0deF0VF : $@convention(thin) (@guaranteed MethodTestingStruct) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: destroy_value [[VAL]]
//
// With borrow
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[SELF]]
// CHECK: [[VAL:%.*]] = load_borrow [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr22useMethodTestingStructyyAA0deF0VF : $@convention(thin) (@guaranteed MethodTestingStruct) -> ()
// CHECK: apply [[FUNC]]([[VAL]])
// CHECK: end_borrow [[VAL]]
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr19MethodTestingStructV26mutatingPassSelfAsArgumentyyF'
mutating func mutatingPassSelfAsArgument() {
// Without borrow
useMethodTestingStruct(self)
// With borrow
useMethodTestingStruct(_borrow self)
}
}
func useMethodTestingStruct(_ x: MethodTestingStruct) {}
extension P {
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr1PPAAE27mutatingCallingMethodOnSelfyyF : $@convention(method) <Self where Self : P> (@inout Self) -> () {
// CHECK: bb0([[ADDR:%.*]] :
//
// First without borrow.
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[STACK:%.*]] = alloc_stack $Self
// CHECK: copy_addr [[ACCESS]] to [init] [[STACK]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = witness_method $Self, #P.doSomething : <Self where Self : P> (Self) -> () -> () : $@convention(witness_method: P) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[FUNC]]<Self>([[STACK]])
// CHECK: destroy_addr [[STACK]]
// CHECK: dealloc_stack [[STACK]]
//
// Now with borrow
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[FUNC:%.*]] = witness_method $Self, #P.doSomething : <Self where Self : P> (Self) -> () -> () : $@convention(witness_method: P) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[FUNC]]<Self>([[ACCESS]])
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr1PPAAE27mutatingCallingMethodOnSelfyyF'
mutating func mutatingCallingMethodOnSelf() {
// Without borrow
doSomething()
// With borrow
(_borrow self).doSomething()
}
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr1PPAAE26mutatingPassSelfAsArgumentyyF : $@convention(method) <Self where Self : P> (@inout Self) -> () {
// CHECK: bb0([[ADDR:%.*]] :
//
// First without borrow.
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[STACK:%.*]] = alloc_stack $Self
// CHECK: copy_addr [[ACCESS]] to [init] [[STACK]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr11usePGenericyyxAA1PRzlF : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[FUNC]]<Self>([[STACK]])
// CHECK: destroy_addr [[STACK]]
// CHECK: dealloc_stack [[STACK]]
//
// Now with borrow
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr11usePGenericyyxAA1PRzlF : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[FUNC]]<Self>([[ACCESS]])
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr1PPAAE26mutatingPassSelfAsArgumentyyF'
mutating func mutatingPassSelfAsArgument() {
// Without borrow
usePGeneric(self)
// With borrow
usePGeneric(_borrow self)
}
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr1PPAAE38mutatingExtensionPointCallMethodOnSelfyyF : $@convention(method) <Self where Self : P> (@inout Self) -> () {
// CHECK: bb0([[ADDR:%.*]] :
//
// First without borrow.
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[STACK:%.*]] = alloc_stack $Self
// CHECK: copy_addr [[ACCESS]] to [init] [[STACK]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = witness_method $Self, #P.doSomething : <Self where Self : P> (Self) -> () -> () : $@convention(witness_method: P) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[FUNC]]<Self>([[STACK]])
// CHECK: destroy_addr [[STACK]]
// CHECK: dealloc_stack [[STACK]]
//
// Now with borrow
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[FUNC:%.*]] = witness_method $Self, #P.doSomething : <Self where Self : P> (Self) -> () -> () : $@convention(witness_method: P) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[FUNC]]<Self>([[ACCESS]])
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr1PPAAE38mutatingExtensionPointCallMethodOnSelfyyF'
mutating func mutatingExtensionPointCallMethodOnSelf() {
// Without borrow
doSomething()
// With borrow
(_borrow self).doSomething()
}
// CHECK-LABEL: sil hidden [ossa] @$s11borrow_expr1PPAAE35mutatingExtensionPointPassSelfAsArgyyF : $@convention(method) <Self where Self : P> (@inout Self) -> () {
// CHECK: bb0([[ADDR:%.*]] :
//
// First without borrow.
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[STACK:%.*]] = alloc_stack $Self
// CHECK: copy_addr [[ACCESS]] to [init] [[STACK]]
// CHECK: end_access [[ACCESS]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr11usePGenericyyxAA1PRzlF : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[FUNC]]<Self>([[STACK]])
// CHECK: destroy_addr [[STACK]]
// CHECK: dealloc_stack [[STACK]]
//
// Now with borrow
// CHECK: [[ACCESS:%.*]] = begin_access [read] [unknown] [[ADDR]]
// CHECK: [[FUNC:%.*]] = function_ref @$s11borrow_expr11usePGenericyyxAA1PRzlF : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
// CHECK: apply [[FUNC]]<Self>([[ACCESS]])
// CHECK: end_access [[ACCESS]]
// CHECK: } // end sil function '$s11borrow_expr1PPAAE35mutatingExtensionPointPassSelfAsArgyyF'
mutating func mutatingExtensionPointPassSelfAsArg() {
// Without borrow
usePGeneric(self)
// With borrow
usePGeneric(_borrow self)
}
}