[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 #10 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Peter Cordes from comment #0)

> Scalar 64-bit integer ops in vector regs may be useful in general in 32-bit
> code in some cases, especially if it helps with register pressure.

We have scalar-to-vector pass (-mstv) that does the above, but chooses not to
convert the above code due to costs.