[Bug target/66960] Add interrupt attribute to x86 backend

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66960

--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Created attachment 38653 [details]
> A patch
>
> Please try this.

The patch fixes the issue, thanks.