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[stdlib] make _overrideLifetime() functions public #81224

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Merged
merged 4 commits into from
May 7, 2025
Merged

[stdlib] make _overrideLifetime() functions public #81224

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e0cfb31
[stdlib] make `_overrideLifetime` functions public
glessard Apr 30, 2025
26764bf
[test] use the stdlib _overrideLifetime functions
glessard Apr 30, 2025
bc22bcd
[stdlib] remove TODOs
glessard May 6, 2025
d0445f3
[test] remove more copies of `_overrideLifetime()`
glessard May 1, 2025
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6 changes: 3 additions & 3 deletions stdlib/public/core/LifetimeManager.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -290,7 +290,7 @@ public func _copy<T>(_ value: T) -> T {
@_alwaysEmitIntoClient
@_transparent
@lifetime(borrow source)
internal func _overrideLifetime<
public func _overrideLifetime<
T: ~Copyable & ~Escapable, U: ~Copyable & ~Escapable
>(
_ dependent: consuming T, borrowing source: borrowing U
Expand All @@ -308,7 +308,7 @@ internal func _overrideLifetime<
@_alwaysEmitIntoClient
@_transparent
@lifetime(copy source)
internal func _overrideLifetime<
public func _overrideLifetime<
T: ~Copyable & ~Escapable, U: ~Copyable & ~Escapable
>(
_ dependent: consuming T, copying source: borrowing U
Expand All @@ -326,7 +326,7 @@ internal func _overrideLifetime<
@_alwaysEmitIntoClient
@_transparent
@lifetime(&source)
internal func _overrideLifetime<
public func _overrideLifetime<
T: ~Copyable & ~Escapable, U: ~Copyable & ~Escapable
>(
_ dependent: consuming T,
Expand Down
51 changes: 0 additions & 51 deletions test/SILOptimizer/Inputs/SpanExtras.swift
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Original file line number Diff line number Diff line change
@@ -1,56 +1,5 @@
import Builtin

/// Unsafely discard any lifetime dependency on the `dependent` argument. Return
/// a value identical to `dependent` with a lifetime dependency on the caller's
/// borrow scope of the `source` argument.
@unsafe
@_unsafeNonescapableResult
@_alwaysEmitIntoClient
@_transparent
@lifetime(borrow source)
internal func _overrideLifetime<
T: ~Copyable & ~Escapable, U: ~Copyable & ~Escapable
>(
_ dependent: consuming T, borrowing source: borrowing U
) -> T {
// TODO: Remove @_unsafeNonescapableResult. Instead, the unsafe dependence
// should be expressed by a builtin that is hidden within the function body.
dependent
}

/// Unsafely discard any lifetime dependency on the `dependent` argument. Return
/// a value identical to `dependent` that inherits all lifetime dependencies from
/// the `source` argument.
@unsafe
@_unsafeNonescapableResult
@_alwaysEmitIntoClient
@_transparent
@lifetime(copy source)
internal func _overrideLifetime<
T: ~Copyable & ~Escapable, U: ~Copyable & ~Escapable
>(
_ dependent: consuming T, copying source: borrowing U
) -> T {
// TODO: Remove @_unsafeNonescapableResult. Instead, the unsafe dependence
// should be expressed by a builtin that is hidden within the function body.
dependent
}

@unsafe
@_unsafeNonescapableResult
@_alwaysEmitIntoClient
@_transparent
@lifetime(&source)
internal func _overrideLifetime<
T: ~Copyable & ~Escapable, U: ~Copyable & ~Escapable
>(
_ dependent: consuming T, mutating source: inout U
) -> T {
// TODO: Remove @_unsafeNonescapableResult. Instead, the unsafe dependence
// should be expressed by a builtin that is hidden within the function body.
dependent
}

// A MutableSpan<Element> represents a span of memory which
// contains initialized `Element` instances.
@frozen
Expand Down