https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99648
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 50566 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50566&action=edit gcc11-pr99648.patch Updated patch which doesn't ICE anymore. While I think the right thing would be to always punt on SUBREGs of constants, I think that is quite risky this late and so restricting it to MODE_COMPOSITE_P outermodes will make it restricted to powerpc IBM double double format and nothing else (well, there is also mips_extended_format, but no target seems to use it fortunately).