[Bug target/58416] Incorrect x87-based union copying code

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58416

--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 58718
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58718&action=edit
patch I am testing

Paul - can you test if this patch resolves the emacs issue?