[Bug target/119966] [16 regression] pru: Invalid register in RTL expression starting with r16-160-ge6f89d78c1a752

[dimitar at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119966

--- Comment #18 from Dimitar Dimitrov <dimitar at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #15)
> For debug insns, we generally want to be far more tolerant in what subregs
> they accept.

I filed PR120733 to track this particular fallout. I'm not sure if it is "too
much breakage" to warrant a revert, as suggested in
https://gcc.gnu.org/pipermail/gcc-patches/2025-June/685492.html