[Bug target/120689] Codegen optimization regression passing struct in register in gcc 10+ on x86-64.

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120689

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This changed with r10-577-g325437b2a329715da7be4de792af052c19a0ac7b