[Bug rtl-optimization/123586] subreg_lowpart_p wrongly allows paradoxical subregs

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123586

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's worker also accepts non-subregs.