[Bug target/64379] VFP register restore in ARM epilogue can break indirect tailcalls

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64379

--- Comment #15 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Thanks for the input on VxWorks, we'll draft something up about deprecating
> this option.

Note that the system compiler uses APCS frames and DWARF2 EH on VxWorks 6,
which is the mainstream version as of this writing, so this cannot be done too
quickly
for the sake of compatibility with it.