mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
98805c9141
The InstructionDeleter can remove instructions including their destroys and then insert compensating destroys at a new place. This is effectively destroy-hoisting which doesn't respect deinit-barriers. Therefore it's not done for lexical lifetimes. However, since https://github.com/swiftlang/swift/pull/85334, the optimizer should treat _all_ lifetimes as fixed and not only lexical lifetimes. This change adds a `assumeFixedLifetimes` flag to InstructionDeleter which is on by default. Only mandatory passes (like OSLogOptimization) should turn this off.