[Bug target/95571] xtensa stack unwinding doesn't work well with asynchronous register spilling

[jcmvbkbc at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95571

--- Comment #1 from jcmvbkbc at gcc dot gnu.org ---
Created attachment 48699
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48699&action=edit
minimal reproducer

Reproducer spills active register windows in a substitute memcpy as could be
done by an interrupt handler.