[cfe-dev] Compatibility of -fsanitize-coverage and CFI

[Stephen Crane via cfe-dev]

I've been poking back through commit history and the mailing lists and I
can't find any explanation of why CFI is not allowed to be combined with
sancov. It even appears to me that CFI w/ diagnostics uses ubsan which
links in sancov and initializes coverage. Is CFI actually incompatible with
sancov or should I try to allow them together and add tests for this?

Thanks,
Stephen
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