[PATCH] D122258: [MC][RFC] Omit DWARF unwind info if compact unwind is present for all archs

[Fangrui Song via Phabricator via cfe-commits]

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:
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  https://reviews.llvm.org/D122258/new/

https://reviews.llvm.org/D122258