[Bug middle-end/127378] widening _BitInt store leaves most significant limb unwritten on PPC64 (big-endian)

[mmatti.gnu at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127378

--- Comment #7 from Manjunath S Matti <mmatti.gnu at gmail dot com> ---
Thanks Jakub for pushing this in.