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164ac421d6
An early approach to codegen for `#_hasSymbol` relied on the Darwin platfom SDK, but now that the feature lowers directly to NULL checks in LLVM IR a platform restriction is no longer needed. However, the tests for `#_hasSymbol` remain unsupported on Windows since that OS does not support weak linking.
42 lines
1.4 KiB
Swift
42 lines
1.4 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: split-file %s %t
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// RUN: %target-swift-frontend -O -emit-module -emit-module-path %t/Library.swiftmodule -parse-as-library %t/Library.swift -enable-library-evolution
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// RUN: %target-swift-frontend -O -emit-sil %t/Client.swift -I %t -module-name test | %FileCheck %s
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// UNSUPPORTED: OS=windows-msvc
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//--- Library.swift
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@usableFromInline func usableFromInlineFunc() {}
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public struct S {
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@usableFromInline var member: Int = 0
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public init() {}
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}
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@_alwaysEmitIntoClient
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public func serializedHasSymbolFunc(_ s: S) -> Bool {
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guard #_hasSymbol(usableFromInlineFunc) else { return false }
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guard #_hasSymbol(s.member) else { return false }
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return true
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}
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//--- Client.swift
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@_weakLinked import Library
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public func foo() -> Bool {
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// CHECK: {{%[0-9]+}} = has_symbol #usableFromInlineFunc
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// CHECK: {{%[0-9]+}} = has_symbol #S.member
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return serializedHasSymbolFunc(S())
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}
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// Verify that the functions referenced by the deserialized `has_symbol`
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// instructions have also been deserialized and remain after dead function
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// elimination.
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// CHECK: sil @$s7Library20usableFromInlineFuncyyF : $@convention(thin) () -> ()
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// CHECK: sil @$s7Library1SV6memberSivg : $@convention(method) (@in_guaranteed S) -> Int
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// CHECK: sil @$s7Library1SV6memberSivs : $@convention(method) (Int, @inout S) -> ()
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// CHECK: sil @$s7Library1SV6memberSivM : $@yield_once @convention(method) (@inout S) -> @yields @inout Int
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