[Bug target/113485] [14 regression] ICE with -fno-guess-branch-probability on aarch64 starting with r14-7187-g74e3e839ab2d36

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113485

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note the issue is really:
9730        rtx op = lowpart_subreg (<VNARROWQ2>mode, operands[1],
<VNARROWQ>mode);


We have:
(subreg:V8QI (reg/v:V4x8QI 110 [ input_pixels ]) 8)

And then lowpart_subreg  returns null.

Note I still have my doubts about aarch64_get_shareable_reg, especially when
spread across different splits.