[Bug tree-optimization/85478] ICE with single element vector

[krebbel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85478

--- Comment #7 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
The cross from comment #6 did not trigger the problem because I accidentally
built it with --disable-checking. Dropping this and adding
--with-long-double-128 triggers the ICE on a full cross as well as on a cross
without sysroot.