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Part of the Embedded Swift linkage model, this attribute ensures that the function it applies to has a strong definition in its owning module, and that its SIL is never serialized. That way, other modules will not have access to its definition. Implements rdar://158364184.
82 lines
3.0 KiB
Swift
82 lines
3.0 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: split-file %s %t
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// Library module
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// SIL checking
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// RUN: %target-swift-frontend %t/Library.swift -parse-as-library -entry-point-function-name Library_main -enable-experimental-feature Embedded -emit-sil -emit-module-path %t/Modules/Library.swiftmodule -o - | %FileCheck -check-prefix LIBRARY-SIL %s
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// IR checking to ensure we get the right weak symbols.
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// RUN: %target-swift-frontend %t/Library.swift -parse-as-library -entry-point-function-name Library_main -enable-experimental-feature Embedded -emit-ir -o - | %FileCheck -check-prefix LIBRARY-IR --dump-input-filter all %s
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// Application module
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// RUN: %target-swift-frontend %t/Application.swift -I %t/Modules -parse-as-library -entry-point-function-name Application_main -enable-experimental-feature Embedded -emit-sil -o - | %FileCheck -check-prefix APPLICATION-SIL %s
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// RUN: %target-swift-frontend %t/Application.swift -I %t/Modules -parse-as-library -entry-point-function-name Application_main -enable-experimental-feature Embedded -emit-ir -o - | %FileCheck -check-prefix APPLICATION-IR %s
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// REQUIRES: swift_in_compiler
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// REQUIRES: swift_feature_Embedded
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//--- Library.swift
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// LIBRARY-IR: define {{(protected |dllexport )?}}swiftcc ptr @"$e7Library5helloSaySiGyF"()
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@_neverEmitIntoClient
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public func hello() -> [Int] {
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getArray()
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}
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// LIBRARY-IR: define {{(protected |dllexport )?}}swiftcc ptr @"$e7Library8getArraySaySiGyF"()
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public func getArray() -> [Int] {
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throughInternal()
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}
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// LIBRARY-IR: define {{(protected |dllexport )?}}swiftcc ptr @"$e7Library15throughInternalSaySiGyF"()
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func throughInternal() -> [Int] {
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throughPrivate()
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}
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// LIBRARY-IR: define {{(protected |dllexport )?}}swiftcc ptr @"$e7Library14throughPrivate
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private func throughPrivate() -> [Int] {
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[5, 6, 7]
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}
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// LIBRARY-IR-NOT: unnecessary
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public func unnecessary() -> Int { 5 }
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// LIBRARY-IR: define linkonce_odr hidden swiftcc { ptr, ptr } @"$es27_allocateUninitializedArrayySayxG_BptBwlFSi_Tg5"
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// LIBRARY-SIL: sil @$e7Library5helloSaySiGyF
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// LIBRARY-SIL: sil @$e7Library8getArraySaySiGyF : $@convention(thin) () -> @owned Array<Int> {
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//--- Application.swift
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import Library
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@_neverEmitIntoClient
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public func testMe() {
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_ = hello()
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_ = getArray()
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}
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// Note: "hello" is emitted only into the object file, so there is no definition
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// here.
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// APPLICATION-SIL: sil @$e7Library5helloSaySiGyF : $@convention(thin) () -> @owned Array<Int>{{$}}
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// APPLICATION-IR: declare swiftcc ptr @"$e7Library5helloSaySiGyF"()
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// Note: "getArray" is not @_neverEmitIntoClient, so it's definition is
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// available.
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// APPLICATION-SIL: sil public_external @$e7Library8getArraySaySiGyF : $@convention(thin) () -> @owned Array<Int> {
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// APPLICATION-IR: define linkonce_odr hidden swiftcc ptr @"$e7Library8getArraySaySiGyF"()
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// APPLICATION-IR: define{{.*}}@Application_main
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@main
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struct Main {
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static func main() {
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}
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}
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// APPLICATION-IR: define linkonce_odr hidden swiftcc { ptr, ptr } @"$es27_allocateUninitializedArrayySayxG_BptBwlFSi_Tg5"
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