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Add computeKnownLiveness utility

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To fix LifetimeDependenceScopeFixup in the presense of pointer escapes.
This commit is contained in:
Andrew Trick
2024-03-14 20:48:44 -07:00
parent aa208bbf91
commit bdabc2145a
4 changed files with 123 additions and 66 deletions
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4
SwiftCompilerSources/Sources/Optimizer/Utilities/AddressUtils.swift
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@@ -502,7 +502,7 @@ extension AddressOwnershipLiveRange {
///
/// For address values, use AccessBase.computeOwnershipRange.
///
/// FIXME: This should use computeLinearLiveness rather than computeInteriorLiveness as soon as lifetime completion
/// FIXME: This should use computeLinearLiveness rather than computeKnownLiveness as soon as lifetime completion
/// runs immediately after SILGen.
private static func computeValueLiveRange(of value: Value, _ context: FunctionPassContext)
-> AddressOwnershipLiveRange? {
@@ -511,7 +511,7 @@ extension AddressOwnershipLiveRange {
// This is unexpected for a value with derived addresses.
return nil
case .owned:
return .owned(value, computeInteriorLiveness(for: value, context))
return .owned(value, computeKnownLiveness(for: value, context))
case .guaranteed:
return .borrow(computeBorrowLiveRange(for: value, context))
}