[Bug target/65671] Assembly failure (invalid register operand) with -O3 -mavx512vl

[kyukhin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65671

--- Comment #2 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Created attachment 35272
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35272&action=edit
Proposed patch

I am testing this patch.