[libc-commits] [libc] [libc] implement sigsetjmp/siglongjmp for x86-64 (PR #136072)

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gulfemsavrun wrote:

I reverted the change via https://github.com/llvm/llvm-project/pull/137077. Before relanding, please make sure that it fixes the reported issues. I can test it on our builders when you have the fix if you need my help.

https://github.com/llvm/llvm-project/pull/136072