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// RUN: %target-swift-emit-silgen -module-name force_cast_chained_optional %s | %FileCheck %s
class Foo {
var bar: Bar!
}
class Bar {
var bas: C!
}
class C {}
class D: C {}
// CHECK-LABEL: sil hidden [ossa] @$s27force_cast_chained_optional4testyAA1DCAA3FooCF
// CHECK: bb0([[ARG:%.*]] : @guaranteed $Foo):
// CHECK: class_method [[ARG]] : $Foo, #Foo.bar!getter : (Foo) -> () -> Bar?, $@convention(method) (@guaranteed Foo) ->
// CHECK: select_enum_addr {{%.*}}
// CHECK: cond_br {{%.*}}, [[SOME_BAR:bb[0-9]+]], [[NO_BAR:bb[0-9]+]]
//
// CHECK: [[SOME_BAR]]:
// CHECK: [[PAYLOAD_ADDR:%.*]] = unchecked_take_enum_data_addr {{%.*}} : $*Optional<Bar>
// CHECK: [[BAR:%.*]] = load [copy] [[PAYLOAD_ADDR]]
// CHECK: [[BORROWED_BAR:%.*]] = begin_borrow [[BAR]]
// CHECK: [[METHOD:%.*]] = class_method [[BORROWED_BAR]] : $Bar, #Bar.bas!getter : (Bar) -> () -> C?, $@convention(method) (@guaranteed Bar) ->
// CHECK: apply [[METHOD]]([[BORROWED_BAR]])
// CHECK: end_borrow [[BORROWED_BAR]]
// CHECK: unconditional_checked_cast {{%.*}} : $C to D
//
// CHECK: [[NO_BAR]]:
// CHECK: unreachable
func test(_ x: Foo) -> D {
return x.bar?.bas as! D
}
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