[PATCH] D103745: [dfsan] Add full fast8 support

[Taewook Oh via Phabricator via cfe-commits]

twoh added a comment.

@browneee Thanks! Makes sense. Is there a chance that you have an idea of the ballpark overhead of the legacy mode? I'm curious if we track N-labels, the total CPU time is generally much higher with "legacy-mode single-run with N labels" than "fast-8 mode (N/8) runs". I think there are still reasons to prefer multiple runs of fast-8 mode over the legacy mode even when the total CPU times are similar, but I wonder how bad is the overhead of expensive union operations performed by the legacy mode.


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https://reviews.llvm.org/D103745