[PATCH] D42898: Do not spill CSR to stack on entry to noreturn functions

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> I did think about that, but came to the conclusion that longjmp would have to restore all callee-saves to the state they had at setjmp, and that setjmp would have to store them into the jmp_buf.

Huh.  I guess that works?  But you probably want to explicitly note that in a comment in the code.


https://reviews.llvm.org/D42898