[Bug target/127256] libjxl build ICEs in simplify_gen_subreg_concatn, at lower-subreg.cc:744

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127256

--- Comment #3 from Richard Sandiford <rsandifo at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Possibly fixed by r17-3907-gec58d736cd572b on trunk?

Yeah, could be.  The lower-subreg.cc part would make sense as an independent
patch if so.