[PATCH] D116750: [clang][lex] Keep references to `DirectoryLookup` objects up-to-date

[Nico Weber via Phabricator via cfe-commits]

thakis added a comment.

1. `which is stable thanks to the bump-ptr-allocation strategy.` I don't understand this. In each slab, that's true, but why is it true between objects allocated in different slabs?
2. This increases numbers of TUs compiled for LexTests by over 10%. Is there no way around that Frontend dep?


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https://reviews.llvm.org/D116750