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31 lines
1.1 KiB
Swift
31 lines
1.1 KiB
Swift
// RUN: %target-swift-frontend -emit-silgen %s | FileCheck %s
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class Foo {
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var bar: Bar!
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}
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class Bar {
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var bas: C!
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}
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class C {}
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class D: C {}
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// CHECK-LABEL: sil hidden @_TF27force_cast_chained_optional4testFCS_3FooCS_1D
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// CHECK: class_method %0 : $Foo, #Foo.bar!getter.1 : Foo -> () -> Bar! , $@convention(method) (@guaranteed Foo) ->
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// CHECK: select_enum_addr
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// CHECK: cond_br {{%.*}}, [[SOME_BAR:bb[0-9]+]], [[NO_BAR:bb[0-9]+]]
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// CHECK: [[NO_BAR]]:
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// CHECK: br [[TRAP:bb[0-9]+]]
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// CHECK: [[SOME_BAR]]:
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// CHECK: [[PAYLOAD_ADDR:%.*]] = unchecked_take_enum_data_addr {{%.*}} : $*ImplicitlyUnwrappedOptional<Bar>
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// CHECK: [[BAR:%.*]] = load [[PAYLOAD_ADDR]]
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// CHECK: class_method {{%.*}} : $Bar, #Bar.bas!getter.1 : Bar -> () -> C! , $@convention(method) (@guaranteed Bar) ->
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// CHECK: function_ref @_TFSs36_getImplicitlyUnwrappedOptionalValueU__FGSQQ__Q_
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// CHECK: unconditional_checked_cast {{%.*}} : $C to $D
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// CHECK: [[TRAP]]:
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// CHECK: unreachable
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func test(x: Foo) -> D {
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return x.bar?.bas as! D
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}
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