https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69530
--- Comment #6 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to H.J. Lu from comment #5) > Created attachment 37509 [details] > A patch > > I am testing this. Many post-reload splitters in i386.md check their operands with REG_P, based on the premise that there are no subregs after registers are allocated. I don't know what will break if this is not the case anymore.
