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38 lines
1.2 KiB
Swift
38 lines
1.2 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 @_T027force_cast_chained_optional4testAA1DCAA3FooCF
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// CHECK: bb0([[ARG:%.*]] : $Foo):
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// CHECK: [[BORROWED_ARG:%.*]] = begin_borrow [[ARG]]
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// CHECK: class_method [[BORROWED_ARG]] : $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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//
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// CHECK: [[NO_BAR]]:
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// CHECK: br [[TRAP:bb[0-9]+]]
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//
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// CHECK: [[SOME_BAR]]:
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// CHECK: [[PAYLOAD_ADDR:%.*]] = unchecked_take_enum_data_addr {{%.*}} : $*Optional<Bar>
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// CHECK: [[BAR:%.*]] = load [copy] [[PAYLOAD_ADDR]]
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// CHECK: [[METHOD:%.*]] = class_method [[BAR]] : $Bar, #Bar.bas!getter.1 : (Bar) -> () -> C!, $@convention(method) (@guaranteed Bar) ->
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// CHECK: apply [[METHOD]]([[BAR]])
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// CHECK: destroy_value [[BAR]]
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// CHECK: unconditional_checked_cast {{%.*}} : $C to $D
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// CHECK: end_borrow [[BORROWED_ARG]] from [[ARG]]
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//
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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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