[Bug target/88469] [7/8/9 regression] AAPCS - Struct with 64-bit bitfield may be passed in wrong registers

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88469

--- Comment #5 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Tentative patch posted here.

https://gcc.gnu.org/ml/gcc-patches/2018-12/msg01231.html