[qt/clang/llvm]: Summary of bulk changes made

Git repository change summary for qt/clang/llvm
Pushed by mirror-service into branch 'upstream/users/usx95/04-07-nfc-checker-prefix'.
Changed from 46931a7684da9f755c0137abd254efadb7b8ce77 to 0209269c96d91a1a063541d5e5ff9ef847e4d242
Acknowledgement was received that this change introduces only existing code that has been pushed to another public open source repository.

This change contains the following new commits:

Git commit 7d3f6dd010abe17832257522605f633689d41842 by Utkarsh Saxena on 24/07/2026 at 21:24..
[LifetimeSafety][NFC] Refactor AccessPath and Loan representations

This patch refactors the internal representations of `AccessPath` and `Loan` to support path elements, preparing for field-sensitive and interior-sensitive lifetime tracking.

- Introduces `PathElement` representing a field or interior dereference.
- Refactors `AccessPath` to contain a base and a list of `PathElement`s.
- Updates `Loan` and `LoanManager` to use the new `AccessPath` structure.
- Refactors debug dump formatting to output path elements if present.
- Updates Checker and FactsGenerator to compile with the new interfaces, keeping logic behaviorally identical (NFC).

TAG=agy
CONV=2cfd8d00-18d7-4a03-8d78-2aba2f9a8f23
https://invent.kde.org/qt/clang/llvm/-/commit/7d3f6dd010abe17832257522605f633689d41842

Git commit 0209269c96d91a1a063541d5e5ff9ef847e4d242 by Utkarsh Saxena on 24/07/2026 at 21:24..
[LifetimeSafety][NFC] Update Checker to use prefix comparison interfaces

This patch switches the Checker's expiry and invalidation checks to use `AccessPath::isPrefixOf` instead of equality (`==`).

Since all generated access paths are currently empty, `isPrefixOf` is behaviorally identical to `==` (NFC). This prepares the checker to handle nested paths (fields and container interiors) in subsequent commits.

TAG=agy
CONV=2cfd8d00-18d7-4a03-8d78-2aba2f9a8f23
https://invent.kde.org/qt/clang/llvm/-/commit/0209269c96d91a1a063541d5e5ff9ef847e4d242