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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.
39 lines
1.1 KiB
Swift
39 lines
1.1 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-build-swift -lswiftSwiftReflectionTest %s -o %t/reflect_empty_class
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// RUN: %target-codesign %t/reflect_empty_class
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// RUN: %target-run %target-swift-reflection-test %t/reflect_empty_class | %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 EmptyClass { }
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var obj = EmptyClass()
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reflect(object: obj)
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// CHECK-64: Reflecting an object.
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// CHECK-64: Instance pointer in child address space: 0x{{[0-9a-fA-F]+}}
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// CHECK-64: Type reference:
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// CHECK-64: (class reflect_empty_class.EmptyClass)
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// CHECK-64: Type info:
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// CHECK-64: (class_instance size=16 alignment=1 stride=16 num_extra_inhabitants=0 bitwise_takable=1)
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// CHECK-32: Reflecting an object.
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// CHECK-32: Instance pointer in child address space: 0x{{[0-9a-fA-F]+}}
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// CHECK-32: Type reference:
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// CHECK-32: (class reflect_empty_class.EmptyClass)
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// CHECK-32: Type info:
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// CHECK-32: (class_instance size=8 alignment=1 stride=8 num_extra_inhabitants=0 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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