[Bug target/118827] riscv scalar and vector are all saved when __attribute__((interrupt)) used

[fanghuaqi at vip dot qq.com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118827

--- Comment #4 from Huaqi <fanghuaqi at vip dot qq.com> ---
But why interrupt attributed function behavior are different from normal
function?

see my previous comment https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118827#c2