https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81709
H.J. Lu <hjl.tools at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |WONTFIX --- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> --- If you want to use SSE registers, you can write the interrupt handler with the new naked attribute in GCC 8.