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Usually there _must_ be a read from a consuming in-argument, because the function has to consume the argument. But in the special case if all control paths end up in an `unreachable`, the consuming read might have been dead-code eliminated. Therefore make sure to add the read-effect in any case. Otherwise it can result in memory lifetime failures at a call site. fixes a memory lifetime failure rdar://134881045
20 lines
646 B
Swift
20 lines
646 B
Swift
// RUN: %target-swift-frontend -O -Xllvm -sil-disable-pass=function-signature-opts -emit-sil -primary-file %s | %FileCheck %s
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public struct S {
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@inline(never)
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init<T>(_ t: T) {
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fatalError()
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}
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}
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// check that this doesn't cause a memory lifetime failure
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// CHECK-LABEL: sil @$s22generic_specialization6testityAA1SVSSF :
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// CHECK: [[F:%.*]] = function_ref @$s22generic_specialization1SVyACxclufCSS_Tt0g5 :
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// CHECK: = apply [[F]](%0) : $@convention(thin) (@owned String) -> S
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// CHECK: } // end sil function '$s22generic_specialization6testityAA1SVSSF'
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public func testit(_ s: String) -> S {
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return S(s)
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}
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