[libcxx-commits] [PATCH] D110731: [libunwind] Fix cfi_register for float registers.

[Martin Storsjö via Phabricator via libcxx-commits]

mstorsjo accepted this revision.
mstorsjo added a comment.

In D110731#3035927 <https://reviews.llvm.org/D110731#3035927>, @danielkiss wrote:

> As I know `.cfi_undefined` is not emitted and `.cfi_register` is emitted for general purpose registers only, while both appear in hand written assembly for floating point registers on aarch64.
> It is possible to write assembly code that misses this support on arm with dwarf.

Ok, thanks for the clarification.

With that in mind I guess this approach is fine until there's a real need for that construct on arm, on a platform that uses dwarf then.


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