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Bitwise takability is now part of the layout of a type, because non-bitwise takable types are never stored inline in an existential or resilient global's buffer, even if they would fit. The basic rule is that weak references, unknown-refcounted unowned references, and aggregates that contain them, are not bitwise takable, whereas everything else is bitwise takable. Also, since the bitwise takable for an unowned reference depends on the reference counting style, we have to record the superclass of a protocol, if any, to correctly determine the reference counting style of the protocol existential.
176 lines
7.8 KiB
Swift
176 lines
7.8 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-build-swift -lswiftSwiftReflectionTest %s -o %t/reflect_existential
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// RUN: %target-codesign %t/reflect_existential
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// RUN: %target-run %target-swift-reflection-test %t/reflect_existential | %FileCheck %s --check-prefix=CHECK-%target-ptrsize
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// REQUIRES: objc_interop
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// REQUIRES: executable_test
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import SwiftReflectionTest
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class TestGeneric<T> {
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var t: T
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init(_ t: T) {
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self.t = t
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}
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}
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protocol P {}
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protocol CP : class {}
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class C : CP {}
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class D : C, P {}
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reflect(object: TestGeneric(D() as Any))
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// CHECK-64: Type reference:
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// CHECK-64: (bound_generic_class reflect_existential.TestGeneric
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// CHECK-64: (protocol_composition))
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// CHECK-64: Type info:
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// CHECK-64: (class_instance size=48 alignment=8 stride=48 num_extra_inhabitants=0 bitwise_takable=1
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// CHECK-64: (field name=t offset=16
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// CHECK-64: (opaque_existential size=32 alignment=8 stride=32 num_extra_inhabitants=2147483647 bitwise_takable=1
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// CHECK-64: (field name=metadata offset=24
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// CHECK-64: (builtin size=8 alignment=8 stride=8 num_extra_inhabitants=2147483647 bitwise_takable=1)))))
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// CHECK-32: Type reference:
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// CHECK-32: (bound_generic_class reflect_existential.TestGeneric
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// CHECK-32: (protocol_composition))
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// CHECK-32: Type info:
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// CHECK-32: (class_instance size=24 alignment=4 stride=24 num_extra_inhabitants=0 bitwise_takable=1
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// CHECK-32: (field name=t offset=8
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// CHECK-32: (opaque_existential size=16 alignment=4 stride=16 num_extra_inhabitants=4096 bitwise_takable=1
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// CHECK-32: (field name=metadata offset=12
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// CHECK-32: (builtin size=4 alignment=4 stride=4 num_extra_inhabitants=4096 bitwise_takable=1)))))
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reflect(object: TestGeneric(D() as P))
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// CHECK-64: Type reference:
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// CHECK-64: (bound_generic_class reflect_existential.TestGeneric
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// CHECK-64: (protocol_composition
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// CHECK-64: (protocol reflect_existential.P)))
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// CHECK-64: Type info:
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// CHECK-64: (class_instance size=56 alignment=8 stride=56 num_extra_inhabitants=0 bitwise_takable=1
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// CHECK-64: (field name=t offset=16
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// CHECK-64: (opaque_existential size=40 alignment=8 stride=40 num_extra_inhabitants=2147483647 bitwise_takable=1
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// CHECK-64: (field name=metadata offset=24
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// CHECK-64: (builtin size=8 alignment=8 stride=8 num_extra_inhabitants=2147483647 bitwise_takable=1))
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// CHECK-64: (field name=wtable offset=32
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// CHECK-64: (builtin size=8 alignment=8 stride=8 num_extra_inhabitants=1 bitwise_takable=1)))))
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// CHECK-32: Type reference:
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// CHECK-32: (bound_generic_class reflect_existential.TestGeneric
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// CHECK-32: (protocol_composition
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// CHECK-32: (protocol reflect_existential.P)))
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// CHECK-32: Type info:
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// CHECK-32: (class_instance size=28 alignment=4 stride=28 num_extra_inhabitants=0 bitwise_takable=1
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// CHECK-32: (field name=t offset=8
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// CHECK-32: (opaque_existential size=20 alignment=4 stride=20 num_extra_inhabitants=4096 bitwise_takable=1
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// CHECK-32: (field name=metadata offset=12
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// CHECK-32: (builtin size=4 alignment=4 stride=4 num_extra_inhabitants=4096 bitwise_takable=1))
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// CHECK-32: (field name=wtable offset=16
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// CHECK-32: (builtin size=4 alignment=4 stride=4 num_extra_inhabitants=1 bitwise_takable=1)))))
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reflect(object: TestGeneric(D() as (P & AnyObject)))
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// CHECK-64: Type reference:
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// CHECK-64: (bound_generic_class reflect_existential.TestGeneric
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// CHECK-64: (protocol_composition any_object
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// CHECK-64: (protocol reflect_existential.P)))
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// CHECK-64: Type info:
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// CHECK-64: (class_instance size=32 alignment=8 stride=32 num_extra_inhabitants=0 bitwise_takable=1
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// CHECK-64: (field name=t offset=16
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// CHECK-64: (class_existential size=16 alignment=8 stride=16 num_extra_inhabitants=2147483647 bitwise_takable=1
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// CHECK-64: (field name=object offset=0
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// CHECK-64: (reference kind=strong refcounting=unknown))
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// CHECK-64: (field name=wtable offset=8
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// CHECK-64: (builtin size=8 alignment=8 stride=8 num_extra_inhabitants=1 bitwise_takable=1)))))
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// CHECK-32: Type reference:
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// CHECK-32: (bound_generic_class reflect_existential.TestGeneric
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// CHECK-32: (protocol_composition any_object
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// CHECK-32: (protocol reflect_existential.P)))
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// CHECK-32: Type info:
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// CHECK-32: (class_instance size=16 alignment=4 stride=16 num_extra_inhabitants=0 bitwise_takable=1
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// CHECK-32: (field name=t offset=8
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// CHECK-32: (class_existential size=8 alignment=4 stride=8 num_extra_inhabitants=4096 bitwise_takable=1
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// CHECK-32: (field name=object offset=0
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// CHECK-32: (reference kind=strong refcounting=unknown))
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// CHECK-32: (field name=wtable offset=4
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// CHECK-32: (builtin size=4 alignment=4 stride=4 num_extra_inhabitants=1 bitwise_takable=1)))))
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reflect(object: TestGeneric(D() as CP))
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// CHECK-64: Type reference:
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// CHECK-64: (bound_generic_class reflect_existential.TestGeneric
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// CHECK-64: (protocol_composition any_object
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// CHECK-64: (protocol reflect_existential.CP)))
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// CHECK-64: Type info:
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// CHECK-64: (class_instance size=32 alignment=8 stride=32 num_extra_inhabitants=0 bitwise_takable=1
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// CHECK-64: (field name=t offset=16
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// CHECK-64: (class_existential size=16 alignment=8 stride=16 num_extra_inhabitants=2147483647 bitwise_takable=1
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// CHECK-64: (field name=object offset=0
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// CHECK-64: (reference kind=strong refcounting=unknown))
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// CHECK-64: (field name=wtable offset=8
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// CHECK-64: (builtin size=8 alignment=8 stride=8 num_extra_inhabitants=1 bitwise_takable=1)))))
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// CHECK-32: Type reference:
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// CHECK-32: (bound_generic_class reflect_existential.TestGeneric
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// CHECK-32: (protocol_composition any_object
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// CHECK-32: (protocol reflect_existential.CP)))
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// CHECK-32: Type info:
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// CHECK-32: (class_instance size=16 alignment=4 stride=16 num_extra_inhabitants=0 bitwise_takable=1
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// CHECK-32: (field name=t offset=8
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// CHECK-32: (class_existential size=8 alignment=4 stride=8 num_extra_inhabitants=4096 bitwise_takable=1
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// CHECK-32: (field name=object offset=0
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// CHECK-32: (reference kind=strong refcounting=unknown))
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// CHECK-32: (field name=wtable offset=4
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// CHECK-32: (builtin size=4 alignment=4 stride=4 num_extra_inhabitants=1 bitwise_takable=1)))))
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reflect(object: TestGeneric(D() as (C & P)))
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// CHECK-64: Type reference:
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// CHECK-64: (bound_generic_class reflect_existential.TestGeneric
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// CHECK-64: (protocol_composition any_object
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// CHECK-64: (class reflect_existential.C)
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// CHECK-64: (protocol reflect_existential.P)))
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// CHECK-64: Type info:
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// CHECK-64: (class_instance size=32 alignment=8 stride=32 num_extra_inhabitants=0 bitwise_takable=1
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// CHECK-64: (field name=t offset=16
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// CHECK-64: (class_existential size=16 alignment=8 stride=16 num_extra_inhabitants=2147483647 bitwise_takable=1
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// CHECK-64: (field name=object offset=0
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// CHECK-64: (reference kind=strong refcounting=native))
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// CHECK-64: (field name=wtable offset=8
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// CHECK-64: (builtin size=8 alignment=8 stride=8 num_extra_inhabitants=1 bitwise_takable=1)))))
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// CHECK-32: Type reference:
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// CHECK-32: (bound_generic_class reflect_existential.TestGeneric
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// CHECK-32: (protocol_composition any_object
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// CHECK-32: (class reflect_existential.C)
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// CHECK-32: (protocol reflect_existential.P)))
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// CHECK-32: Type info:
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// CHECK-32: (class_instance size=16 alignment=4 stride=16 num_extra_inhabitants=0 bitwise_takable=1
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// CHECK-32: (field name=t offset=8
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// CHECK-32: (class_existential size=8 alignment=4 stride=8 num_extra_inhabitants=4096 bitwise_takable=1
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// CHECK-32: (field name=object offset=0
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// CHECK-32: (reference kind=strong refcounting=native))
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// CHECK-32: (field name=wtable offset=4
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// CHECK-32: (builtin size=4 alignment=4 stride=4 num_extra_inhabitants=1 bitwise_takable=1)))))
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doneReflecting()
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// CHECK-64: Done.
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// CHECK-32: Done.
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