[Bug bootstrap/91580] [10 Regression] i686-{darwin, linux} bootstrap fails after r274926

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91580

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 46777
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46777&action=edit
untested patch

I am testing the attached.