[Bug libstdc++/99117] [9/10/11 Regression] cannot accumulate std::valarray

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99117

--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Pedantically speaking if __e in the end reads _M_data of some std::valarray
that happens to alias __p it will be still violating aliasing, but at least
current GCC won't do anything with that.