https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115954
--- Comment #11 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Can someone please raise this also to https://github.com/ARM-software/abi-aa/issues ? Looks like the riscv folks are ahead of the curve of defining the size/alignment here, see https://github.com/riscv-non-isa/riscv-elf-psabi-doc/pull/112 and https://github.com/riscv-non-isa/riscv-elf-psabi-doc/pull/117 .
