[Bug target/120689] [12/13/14/15 Regression] Codegen optimization regression passing struct in register in gcc 10+ on x86-64 since r10-577

[amohr at amohr dot org]

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

--- Comment #6 from Alex Mohr <amohr at amohr dot org> ---
Beauty!  Thank you!