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5680bfde55
The layouts of resilient value types shipped in the Swift 5 standard library x and overlays will forever be frozen in time for backward deployment to old Objective-C runtimes. This PR ensures that even if the layouts of these types evolve in the future, binaries built to run on the old runtime will continue to lay out class instances in a manner compatible with Swift 5. Fixes <rdar://problem/45646886>.
40 lines
1.3 KiB
Plaintext
40 lines
1.3 KiB
Plaintext
// RUN: %swift -gnone -O -disable-legacy-type-info -target x86_64-apple-macosx10.9 -emit-assembly %s -o - | %FileCheck %s
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// REQUIRES: CODEGENERATOR=X86
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// rdar://17999904
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// No i386 test right now because we don't actually have a formal pattern there.
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import Builtin
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class C {}
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sil_vtable C {}
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sil [ossa] @_TFC21autorelease_optimized1Cd : $@convention(method) (@owned C) -> @owned Builtin.NativeObject {
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bb0(%0 : @owned $C):
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%1 = unchecked_ref_cast %0 : $C to $Builtin.NativeObject // user: %2
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return %1 : $Builtin.NativeObject // id: %2
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}
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sil public_external @foo : $@convention(thin) (@owned C) -> @autoreleased C
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sil public_external @bar : $@convention(thin) (@owned C) -> ()
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sil [ossa] @baz : $@convention(thin) (@owned C) -> () {
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bb0(%0 : @owned $C):
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%1 = function_ref @foo : $@convention(thin) (@owned C) -> @autoreleased C
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%2 = apply %1(%0) : $@convention(thin) (@owned C) -> @autoreleased C
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// This call is just so that we won't tail-call
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// objc_retainAutoreleasedReturnValue, which complicates the test.
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%3 = function_ref @bar : $@convention(thin) (@owned C) -> ()
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apply %3(%2) : $@convention(thin) (@owned C) -> ()
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%5 = tuple ()
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return %5 : $()
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}
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// CHECK: callq _foo
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// CHECK-NEXT: movq %rax, %rdi
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// CHECK-NEXT: callq _objc_retainAutoreleasedReturnValue
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