MaskRay added a comment.

> Previously, omitting unnecessary DWARF unwinds was only done for watchOS,

I have looked at compact unwind descriptors in 2020-11 to write 
https://maskray.me/blog/2020-11-08-stack-unwinding#compact-unwind-descriptors
I vaguely remember there is a place where DWARF unwind info is enabled for all 
but few environments (like watchOS). Where is it?
My conjecture is that it may be related to the fact that the compact unwind 
descriptor does not support async unwind tables well and there may be cases 
needing it.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D122258/new/

https://reviews.llvm.org/D122258

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