[Bug target/113763] [14 Regression] build fails with clang++ host compiler because aarch64.cc uses C++14 constexpr.

[rsandifo at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113763

--- Comment #11 from Richard Sandiford <rsandifo at gcc dot gnu.org> ---
Currently away so can't try it myself, but how about just using an ad-hoc
structure instead?