https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68291
--- Comment #10 from Alexandre Oliva <aoliva at gcc dot gnu.org> --- I'm not comfortable with your relaxing the assert in cfgexpand.c:set_rtl. It means we could have a PARALLEL for a RESULT_DECL *and* other variables, because of coalescing. Although we can deal with PARALLELs in a RESULT_DECL, not all expanders will deal with them successfully, IIRC. We should make sure the RESULT_DECL is not coalesced with other variables if we are to accept a PARALLEL there. It's not obvious to me that we already do that, but maybe we do as a side effect of assigning other variables of the same mode to BLKmode and thus to memory, so it might be that it's not a problem, after all, but I'd rather have at least a comment in the assert indicating that the intent of that case is to cover uncoalesced PARALLELs in RESULT_DECLs only. If we did get coalescing, we would likely get expander ICEs elsewhere.
