[Bug target/80833] 32-bit x86 causes store-forwarding stalls for int64_t -> xmm

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80833

--- Comment #9 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #8)
>         movq    %xmm0, (%esp)       <<-- unneeded store due to RA problem

For some reason, reload "fixes" direct DImode register moves, and passes value
via memory. Later passes partially merge these moves, but leave the above insn.